一、SCI 16条
*Record 1 of 16. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Coupled hydrodynamic and water quality simulation of algal bloom in the Three Gorges Reservoir, China
Authors:Li, J; Yang, WJ; Li, WJ; Mu, L; Jin, ZW
Author Full Names:Li, Jian; Yang, Wenjun; Li, Wenjie; Mu, Lin; Jin, Zhongwu
Source:ECOLOGICAL ENGINEERING, 11997-108; 10.1016/j.ecoleng.2018.05.018AUG 15 2018
Language:English
Abstract: Patterns of spatial and temporal variability of algal bloom in the Three Gorges Reservoir (TGR) of China were investigated using Semi-implicit Eulerian-Lagrangian Finite Element (SELFE) model, an unstructured grid, 3-dimensional, hydrodynamic model fully coupled with an extended version of Water Quality Analysis Program (WASP) and the Carbon and Nutrients Diagenesis (CANDI) model. The coupled model was driven by the discharge , operational water level of the TGR, nutrients and phytoplankton from the upstream, climate condition included the solar radiation, heat fluxes and precipitation observed in the hydrometric and meteorological stations. The simulations were conducted to study the dynamic process of the algal blooms occurred in September 2007 and June 2008, and the modeling results agreed well with the field data included nutrients, chlorophyll-a concentrations in the TGR. The results indicated that the nutrients and chlorophyll-a concentrations showed obvious difference in the mainstream and the tributaries affected by the diurnal evolution of the phytoplankton during the algal bloom period. The location of algal bloom in the tributary Xiangxi River where the maximum chlorophyll-a concentration was greater than 30 mu g/L was about 20 km from the river mouth, which coincided with the position of backwater tail controlled by the operation of the TGR. Meanwhile, the nutrients concentration near the river bed reached nearly 10 times of the concentration near the water surface after considering the nutrients released from the re-suspended sediment and the biogeochemical process in the river bed sediment. Finally, the climate change affected the aquatic ecosystem in the TGR was investigated and the countermeasure to inhibit the algal bloom in the tributary was suggested through the scenario modeling.
ISSN:0925-8574
eISSN:1872-6992
IDS Number:GI6FC
Unique ID: WOS:000434463900011
*Record 2 of 16. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Microstructural and Textural Differences Induced by Water and Furnace Cooling in Commercially Pure Zr Annealed in the alpha plus beta Region
Authors:Chai, LJ; Wang, TT; Ren, Y; Song, B; Guo, N; Chen, LY
Author Full Names:Chai, Linjiang; Wang, Tingting; Ren, Yi; Song, Bo; Guo, Ning; Chen, Liangyu
Source:METALS AND MATERIALS INTERNATIONAL, 24(4):673-680; 10.1007/s12540-018-0079-6JUL 2018
Language:English
Abstract: In this work, a commercially pure Zr sheet with a typical bimodal basal texture was annealed in an alpha + beta region and then subjected to different coolings (in water and furnace). Microstructures and textures of both the as-received and the heat-treated specimens were investigated by electron channeling contrast imaging and electron backscatter diffraction techniques. Results show that a duplex microstructure consisting of untransformed bulk alpha grains and twinned martensitic plates is produced in the water-cooled specimen, which possesses a weakened texture compared to the initial one. For the specimen cooled in furnace, however, a uniform microstructure fully comprised of coarser equiaxed grains with a strengthened texture is obtained. Analyses reveal that the rapid cooling in water could suppress variant selection behaviors during beta -> alpha transformation and allow alpha plates with scattered orientations to be nucleated inside beta phases, contributing to the weakened texture. In contrast, during slow cooling in furnace, beta boundaries would act as preferred nucleation sites of alpha embryos, resulting in a strong variant selection that accounts for the intensified texture.
ISSN:1598-9623
eISSN:2005-4149
IDS Number:GJ1LG
Unique ID: WOS:000435016700001
*Record 3 of 16. Search terms matched: CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Theoretical Analysis of the Density of States and Band Structural Properties of Ti1-xSnxO2 Solid Solutions
Authors:Li, J; Zeng, W
Author Full Names:Li, Jian; Zeng, Wen
Source:JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS, 13(7):1057-1062; 10.1166/jno.2018.2371JUL 2018
Language:English
Abstract: The band structure and density of states (DOS) of Ti1-xSnxO2 solid solutions with x = 0, 1/8, 1/4, 1/2 and 1 were investigated by means of the first-principle calculations based on density functional theory. The result indicated that band gap and Fermi level of TiO2-SnO2 vary continuously from those of pure TiO2 to those of Sn content increasing. In addition, the DOS moves towards low energy and the bang gap is broadened with growing value of x. The wide band gap and the low density of the states in the conduction band result in the enhancement of photo-activity in Ti1-xSnxO2.
ISSN:1555-130X
eISSN:1555-1318
IDS Number:GI8VB
Unique ID: WOS:000434802800013
*Record 4 of 16. Search terms matched: CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:A comparison study at the flow stress prediction of Ti-5Al-5Mo-5V-3Cr-1Zr alloy based on BP-ANN and Arrhenius model
Authors:Gan, SW; Zhao, LN
Author Full Names:Gan Shouwu; Zhao Leina
Source:MATERIALS RESEARCH EXPRESS, 5(6):10.1088/2053-1591/aac689JUN 2018
Language:English
Abstract: A series of hot compression tests were conducted on a Gleeble-3500 isothermal simulator to obtain the hot flow curves of Ti-5Al-5Mo-5V-3Cr- lZr alloy and the specimens were compressed with the height reductions of 60% under the deformation temperatures of 973, 1023, 1073, 1123 K and the strain rates of 0.001, 0.01, 0.1, 1 s(-1) . The corresponding back-propagation artificial neural network (BP-ANN) model and the Arrhenius model for this alloy were constructed on the basis of the obtained flow curves for flow stress prediction. Subsequently, the constructed BP-ANN model was proved to be better by comparing the prediction accuracy with the developed Arrhenius model according to statistic calculations. The relative error and the standard deviation for BP-ANN model were calculated to be 1.4714% and 2.2271%, while for Arrhenius model, the corresponding values were 1.2213% and 5.3641%, respectively. Besides, the correlation coefficient of BP-ANN model is 0.9949 and it is 0.9761 for Arrhenius model. The average absolute relative error for BP-ANN model is 2.2836% and it is 23.4527% for Arrhenius model. Finally, the flow curves were extended on the basis of the BP-ANN model, which is believed to be helpful to achieve high accuracy in finite element simulation.
ISSN:2053-1591
Article Number:066505
IDS Number:GI6NU
Unique ID: WOS:000434488100002
*Record 5 of 16. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Multifunctional Light Sword Metasurface Lens
Authors:Zhang, ZR; Wen, DD; Zhang, CM; Chen, M; Wang, W; Chen, SQ; Chen, XZ
Author Full Names:Zhang, Zhengren; Wen, Dandan; Zhang, Chunmei; Chen, Ming; Wang, Wei; Chen, Shuqi; Chen, Xianzhong
Source:ACS PHOTONICS, 5(5):1794-1799; SI10.1021/acsphotonics.7b01536MAY 2018
Language:English
Abstract: The depth of focus of an imaging system determines the range of change for both the position of focal plane and image plane. Although a typical light sword optical element with angular modulation of phase transmittance can extend its focus of depth due to its angular variation of the optical power, it lacks rotational symmetry and exhibits a junction, rendering its fabrication extremely difficult. Optical metasurfaces provide an unusual approach to develop such a device due to their unprecedented capability in the manipulation of light propagation in a desirable manner. We propose and experimentally demonstrate a light sword metasurface lens with multiple functionalities. The position of focal segments can be controlled by changing the polarization state of the incident light. The developed ultrathin, ultraflat device can facilitate device miniaturization and system integration and may find applications in various fields such as optical coupling, imaging, and interconnections.
ISSN:2330-4022
IDS Number:GG5QW
Unique ID: WOS:000432751800024
*Record 6 of 16. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Electrokinetic-Fenton remediation of organochlorine pesticides from historically polluted soil
Authors:Ni, MF; Tian, SL; Huang, QF; Yang, YM
Author Full Names:Ni, Maofei; Tian, Shulei; Huang, Qifei; Yang, Yanmei
Source:ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 25(12):12159-12168; SI10.1007/s11356-018-1479-3APR 2018
Language:English
Abstract: Soil contamination by persistent organic pollutants (POPs) poses a great threat to historically polluted soil worldwide. In this study, soils were characterized, and organochlorine pesticides contained in the soils were identified and quantified. Individual electrokinetic (IE), EK-Fenton-coupled technologies (EF), and enhanced EK-Fenton treatment (E-1, E-2, and E-3) were applied to remediate soils contaminated with hexachloro-cyclohexane soprocide (HCH) and dichloro-diphenyl-trichloroethane (DDT). Variation of pH, electrical conductivity, and electroosmotic flow was evaluated during the EK-Fenton process. The IE treatment showed low removal efficiency for HCHs (30.5%) and DDTs (25.9%). In the EF treatment, the highest removal level (60.9%) was obtained for alpha-HCH, whereas P,P-DDT was the lowest (40.0%). Low solubility of pollutants impeded the HCH and DDT removal. After enhanced EK-Fenton treatment, final removal of pollutants decreased as follows: beta-HCH (82.6%) > gamma-HCH (81.6%) > alpha-HCH (81.2%) > delta-HCH (80.0%) > P,P-DDD (73.8%) > P,P-DDE (73.1%) > P,P-DDT (72.6%) > O,P-DDT (71.5%). The results demonstrate that EK-Fenton is a promising technology for POP removal in historically polluted soil.
ISSN:0944-1344
eISSN:1614-7499
IDS Number:GF2SM
Unique ID: WOS:000431790000089
PubMed ID:29455352
*Record 7 of 16. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Trade-off Analysis of Ecosystem Services in a Mountainous Karst Area, China
Authors:Lang, YQ; Song, W
Author Full Names:Lang, Yanqing; Song, Wei
Source:WATER, 10(3):10.3390/w10030300MAR 2018
Language:English
Abstract: Diversity in ecosystem services and variation in land use by humans leads to reciprocal trade-offs or synergistic relationships between different ecosystem services. To achieve the dual goals of improving human welfare and developing sustainable ecosystems, understanding and clarifying these relationships is an important step. This study selected a mountainous karst area of China as a study area and used the InVEST (Integrate Valuation of Ecosystem Services and Trade-offs) model and the production possibility frontier analysis method to evaluate the spatio-temporal variations in ecosystem services and analyze the trade-off or synergic relationship between different services. The results showed that from 1990 to 2010, the percentage variations in annual mean water yield, soil conservation, carbon storage, and nutrient retention in the mountainous karst area were 2.47, 39.43, -0.34, and -1.16%, respectively. Water yield had trade-off relationships with soil conservation, nutrient retention, and carbon storage, increasing water yields were correlated with decreases in soil conservation, nutrient retention, and carbon storage. Soil conservation and nutrient retention also showed a trade-off relationship, decreasing soil conservation was correlated with gradually increasing nutrient retention. Carbon storage had synergic relationships with nutrient retention and soil conservation, continuous increases in carbon storage were correlated with incremental increases in nutrient retention and gradual decreases in soil conservation.
ISSN:2073-4441
Article Number:300
IDS Number:GA7KV
Unique ID: WOS:000428516000065
*Record 8 of 16. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Allowable span length of submarine pipeline in shallow water
Authors:Fu, CJ; Wang, PY; Zhao, TL; Li, GY
Author Full Names:Fu, Changjing; Wang, Pingyi; Zhao, Tianlong; Li, Guoying
Source:MARINE GEORESOURCES & GEOTECHNOLOGY, 36(5):532-539; 10.1080/1064119X.2017.13510122018
Language:English
Abstract: Because of the complex geological conditions of the seabed, submarine pipelines buried beneath the ocean floor become suspended over the seabed under the long-term scour of waves eroding the surrounding sediment. Further, most oil fields were built in offshore areas while the country was developing. This gives the waves seen in shallow water obvious nonlinear features, and the abnormal characteristics of these waves must be considered when calculating their hydrodynamic forces. Particularly under such conditions, these suspended spans of submarine pipelines are prone to damage caused by the action of the external environment load. Such damages and eventual failures may result not only in great property losses but also pollution of the marine environment. The span length of these areas is a key predictive factor in pipeline damages. Therefore, determining the allowable span length for these submarine pipelines will allow future projects to avoid or prevent damage from excessive suspended span lengths. Expressions of the hydrodynamic loads placed on suspended spans of pipeline were developed in this work based on the first-order approximate cnoidal wave theory and Morison equation. The formula for the allowable free span length was derived for the common forms of free spanning submarine pipeline based on the point where maximum bending stresses remain less than the material's allowable stress. Finally, the allowable free span length of real-world pipelines was calculated for a subsea pipeline project in Bohai Bay. This research shows that, with consideration for the complicated marine environment, existing suspended spans are within allowable length limitations. However, continuing to limit the length of these submarine pipeline spans in the Nanpu oil field will require ongoing attention.
ISSN:1064-119X
eISSN:1521-0618
IDS Number:GH9KZ
Unique ID: WOS:000433989600004
*Record 9 of 16. Search terms matched: CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Spacing of Trapezoidal Cross-section with Pre-stressed Anchor Cable Anti-slide Pile in Light of Double Soil Arching
Authors:Peng, Y; Chen, HK; Wang, PW
Author Full Names:Peng, Yu; Chen, Hongkai; Wang, Pengwei
Source:JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 21(2):10.26802/jaots.2018.019832018
Language:English
Abstract: As a new method for the treatment of bank slope landslide, the advantages of the trapezoidal cross-section with pre-stressed anchor cable anti-slide pile lies in the integration of cantilever anti-slide pile and pre-stressed anchor cable anti-slide pile. Trapezoidal anti-slide piles have increased angles on both sides of anti-sliding piles compared to conventional rectangular section anti-slide piles through further utilizing the compressive properties in the concrete section, thus resulting in upward component force and promoting the formation of soil arching effects obviously. However, variations in the cross-sectional shape have caused changes in the force system of the soil arches between the piles. As a result, the calculation of the spacing of the piles has also changed, which has become a double soil arching shared by a main arch and a secondary arch. Based on the analysis of the staged force changes formed during the process of soil arching, this paper attempts to deduce the calculation method of trapezoidal anti-slide pile spacing in the form of double soil arching, which provides a theoretical reference for designing traditional anti-slide piles.
ISSN:1203-8407
Article Number:201801983
IDS Number:GH1HV
Unique ID: WOS:000433154902096
*Record 10 of 16. Search terms matched: CHONGQING 400074(5); CHONGQING JIAOTONG(5)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Research on GIS - based Urban Planning and Real Estate Management Information System under the Background of New Countryside Construction
Authors:Zhao, Y; Yuan, PY
Author Full Names:Zhao Yu; Yuan Pei-yin
Source:JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 21(2):10.26802/jaots.2018.043602018
Language:English
Abstract: Since the 16th National Congress of the Communist Party of China (CPC), all regions and departments have made great achievements in promoting the reform, economic and social development in accordance with the requirements of comprehensively implementing the scientific concept of development and building a socialist harmonious society. The application of geographic information system technology in urban planning has been widely concerned by the urban planning business department and academia. Based on the application status of GIS in urban planning, this paper has some problems in the application of geographic information system in urban planning, and discusses the development direction of GIS in urban planning with the development of GIS technology. This paper proposes a three - dimensional visualization technology (VR) to implement the urban planning scheme, and the application of Web GIS and VRML technology to achieve public participation in the establishment of the advisory feedback system. In addition, this paper describes the technology of the digital real estate management information system in the south from the aspects of GIS new technology, which includes new technology of database, new technology of software development and new technology of computer application in the background of the emerging technologies, we analysis of the basic principles of these technological progress to the real estate management work so that we can bring the progress and benefits.
ISSN:1203-8407
Article Number:201804360
IDS Number:GH1HV
Unique ID: WOS:000433154905087
*Record 11 of 16. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Research on Small and Medium Sized City Ecological Planning Management System Based on Ant Colony Algorithm
Authors:Zhou, H; Zhou, Y; Dai, ZL
Author Full Names:Zhou, Hui; Zhou, Yun; Dai, Zhili
Source:JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 21(2):10.26802/jaots.2018.054162018
Language:English
Abstract: Eco city as an ideal mode of future city, not only provides a feasible solution to solve the existing problems of the city for people, but also provides a feasible way to achieve the goal of sustainable development, has attracted wide attention from all walks of life. However, due to the defects of traditional urban planning methods and mathematical programming methods in planning and planning methods, it is difficult to solve these problems. For this reason, the ant colony algorithm theory into the study of city ecological planning, analyzing the index system of ecological city planning is put forward based on the background, research progress and typical case planning index system of eco city on the research at home and abroad, discusses the design elements of the city ecological planning index system; secondly, according to the requirements of planning index system the city's ecological theory and practice effects, combined with the evaluation of ecological environment quality of small and medium-sized city, through the use of scientific, practical, dynamic, representative, comparative, combined with the operation, level and the principle of qualitative and quantitative methods, from the three levels of environment, economy and society is designed suitable for small and medium-sized city ecological planning index system.
ISSN:1203-8407
Article Number:201805416
IDS Number:GH1HV
Unique ID: WOS:000433154907075
*Record 12 of 16. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Mechanical Quadrature Methods and Extrapolation for Solving Nonlinear Problems in Elasticity
Authors:Cheng, P; Zhang, L
Author Full Names:Cheng, Pan; Zhang, Ling
Source:MATHEMATICAL PROBLEMS IN ENGINEERING, 10.1155/2018/69321642018
Language:English
Abstract: This paper will study the high accuracy numerical solutions for elastic equations with nonlinear boundary value conditions. The equations will be converted into nonlinear boundary integral equations by the potential theory, in which logarithmic singularity and Cauchy singularity are calculated simultaneously. Mechanical quadrature methods (MQMs) are presented to solve the nonlinear equations where the accuracy of the solutions is of three orders. According to the asymptotical compact convergence theory, the errors with odd powers asymptotic expansion are obtained. Following the asymptotic expansion, the accuracy of the solutions can be improved to five orders with the Richardson extrapolation. Some results are shown regarding these approximations for problems by the numerical example.
ISSN:1024-123X
eISSN:1563-5147
Article Number:6932164
IDS Number:GI9BV
Unique ID: WOS:000434820800001
*Record 13 of 16. Search terms matched: CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Gaze Characteristics of Freeway Drivers in Foggy Weather
Authors:Zhang, XG; Gao, JP
Author Full Names:Zhang, Xuguang; Gao, Jianping
Source:JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 21(2):10.26802/jaots.2018.031792018
Language:English
Abstract: In order to research the differences in a driver's gaze characteristics between foggy and normal weather, a driver's gaze area demand in a foggy environment was analyzed. A dynamic clustering method was introduced to divide the driver's gaze area into five parts. Tests were performed using a real vehicle in naturally occurring foggy weather. The driver's visual references were acquired using smart eye tracking. Distributions for various parameters relevant to the driver's vision, changes of the driver's pupil diameter, gaze angles, and gaze duration were obtained. The results show that with decreasing visibility, the driver's gaze area is mainly concentrated on the pavement, the pupil diameter indicates different levels of visual shock, the driver's vertical gaze angle is less than 0 degrees, and the gaze area is more concentrated. Furthermore, the drivers' gaze duration in low visibility is 4-25% longer than in normal weather. The results of this research can provide a theoretical basis for accident prevention and traffic management in foggy weather.
ISSN:1203-8407
Article Number:201803179
IDS Number:GH1HV
Unique ID: WOS:000433154904002
*Record 14 of 16. Search terms matched: CHONGQING 400074(3); CHONGQING JIAOTONG(3)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Research on Influences of Excavation of Highway High Slope on Structural Stability of Architecture on Top of Slope
Authors:Wang, ZJ; Wu, LM; Wang, SC; Gao, R; Hu, JP; Wang, ZY
Author Full Names:Wang, Zijian; Wu, Liming; Wang, Sichang; Gao, Rong; Hu, Jinpeng; Wang, Zhuyang
Source:JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 21(2):10.26802/jaots.2017.060242018
Language:English
Abstract: Aiming at one certain frame structure, this paper does research on security and stability of slope and architecture on the slope under coupling effects of slope and superstructure. This research shows that it is feasible to utilize finite element strength reduction method to do analysis on security and stability of the structure under coupling effects of slope and superstructure. Structural deformation along X direction increases with the increasing of plastic zone of slope. Displacement of X direction sharply increases when plastic zone of slope passes through the architectural structure. Therefore this research provides reference for plan, design, construction and security evaluation of this type of architecture on the slope.
ISSN:1203-8407
Article Number:201706024
IDS Number:GH1HV
Unique ID: WOS:000433154900083
*Record 15 of 16. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:Effects of Vermicomposting on Heavy Metals in Sewage Sludge
Authors:Yuan, SC; Wang, M; Liu, J; Chen, Y
Author Full Names:Yuan, Shaochun; Wang, Min; Liu, Jie; Chen, Yao
Source:JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 21(2):10.26802/jaots.2018.012802018
Language:English
Abstract: This study investigated the effects of vermicomposting under different stocking densities and water contents on heavy metal content. The vermicomposting experiment used Eisenia foetida for sewage sludge treatment. According to the experiment results, TOC decreased significantly, the concentration of Ni and Cr increased, and the concentration of Cd and Hg had no obvious increase after 60 days experiment Earthworm activities can promote the decomposition and mineralization of organic matters and convert sludge into stable vermicompost. There was no significant difference between the vermicompost and the controlled treatment in the contents of Hg, Ni and Cr. However, the Cd concentration of vermicompost was slightly higher than that of the controlled treatment. The main reason for the increase of heavy metal content is the dry weight matrix decreased. Earthworms have biological enrichment effect for Ni and Cd, and biological absorption effect for Hg and Cr. The stocking density, water content and their interaction can affect the bioaccumulation factors (BAF) significantly.
ISSN:1203-8407
Article Number:201801280
IDS Number:GH1HV
Unique ID: WOS:000433154901155
*Record 16 of 16. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title:A New Incipient Fault Diagnosis Method Combining Improved RLS and LMD Algorithm for Rolling Bearings With Strong Background Noise
Authors:Huang, DR; Ke, LY; Mi, B; Zhao, L; Sun, GX
Author Full Names:Huang Darong; Ke Lanyan; Mi Bo; Zhao Ling; Sun Guoxi
Source:IEEE ACCESS, 626001-26010; 10.1109/ACCESS.2018.28298032018
Language:English
Abstract: Aiming at the dificulty of extracting information for incipient fault symptoms from rolling bearings with strong background noise, an improved incipient fault detection method based on modified recursive least squares (RLS) adaptive equalization, and a local mean decomposition (LMD) algorithm is proposed. First, an efficient RLS de-noising model is established by introducing a momentum factor together with a forgotten factor to de-noise the incipient fault signal of the bearings. Then, the LMD algorithm is used to decompose the pre-processed signal to obtain an effective PF component, and complete the envelope demodulation to extract information from the incipient fault. Based on the above algorithm, an improved RLS and LMD identifying algorithm for incipient faults can thus be achieved. Finally, some actual fault signals of a large unit rolling bearing are used to simulate and verify the accuracy and efficiency of the proposed algorithm. The experimental comparison indicated that our algorithm can not only improve the de-noising effect, but also correctly extract the features of the incipient fault and identify them with good engineering operability and expansibility.
ISSN:2169-3536
IDS Number:GI7NV
Unique ID: WOS:000434690100001
二、EI14条
1. Investigation of rheological and chemical properties asphalt binder rejuvenated with waste vegetable oil
Accession number: 20182505343241
Authors: Cao, Xinxin (1); Wang, Hao (2); Cao, Xuejuan (1); Sun, Wei (2); Zhu, Hongzhou (1); Tang, Boming (1)
Author affiliation: (1) Chongqing Jiaotong University, Chongqing, China; (2) Rutgers, The State University of New Jersey, Piscataway; NJ, United States
Corresponding author: Wang, Hao(hwang.cee@rutgers.edu)
Source title: Construction and Building Materials
Abbreviated source title: Constr Build Mater
Volume: 180
Issue date: 20 August 2018
Publication year: 2018
Pages: 455-463
Language: English
ISSN: 09500618
CODEN: CBUMEZ
Document type: Journal article (JA)
Publisher: Elsevier Ltd
Abstract: To improve the performance of asphalt mixture with high content of reclaimed asphalt pavement (RAP), rejuvenator is usually added. The traditional rejuvenator is non-renewable and contains large amount of carcinogenic polycyclic aromatic hydrocarbons. In this study, the effects of waste vegetable oil (W-oil) on rejuvenating aged asphalt binder were investigated in terms of rheological and chemical properties. The viscosity, complex shear modulus, and fatigue life were measured using Rotational Viscometer (RV) and Dynamic Shear Rheometer (DSR). The chemical properties were characterized by Gel Permeation Chromatography (GPC) and Fourier Transform Infrared Spectroscopy (FTIR). The experimental results indicated that the workability and fatigue resistance of aged asphalt were improved by addition of W-oil. The logarithm values of viscosity of rejuvenated asphalt at specific temperature showed linear relationship with the dosage of W-oil. The fatigue life of rejuvenated asphalt increased exponentially as the dosage of W-oil increased. There was no chemical reaction found between W-oil and aged asphalt. With the increasing content of W-oil, sulfoxide index (IS[dbnd]O) and the large molecule size (LMS) content decreased due to physical dilution. Besides, the workability and fatigue resistance of rejuvenated asphalt were found having close correlations with sulfoxide index and the LMS content. ? 2018 Elsevier Ltd
Number of references: 36
Main heading: Asphalt mixtures
Controlled terms: Asphalt pavements - Binders - Chemical properties - Fatigue of materials - Fourier transform infrared spectroscopy - Functional groups - Gel permeation chromatography - Molecular weight - Polycyclic aromatic hydrocarbons - Vegetable oils - Viscosity
Uncontrolled terms: Complex shear modulus - Dynamic shear rheometer - Gel permeation chromatography (GPC) - Linear relationships - Reclaimed asphalt pavements - Rejuvenator - Rotational viscometer - Waste vegetable oil
Classification code: 411.1 Asphalt
Asphalt
- 801 Chemistry
Chemistry
- 802.3 Chemical Operations
Chemical Operations
- 803 Chemical Agents and Basic Industrial Chemicals
Chemical Agents and Basic Industrial Chemicals
- 804.1 Organic Compounds
Organic Compounds
- 931.2 Physical Properties of Gases, Liquids and Solids
Physical Properties of Gases, Liquids and Solids
- 931.3 Atomic and Molecular Physics
Atomic and Molecular Physics
- 951 Materials Science
Materials Science
DOI: 10.1016/j.conbuildmat.2018.06.001
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
2. Mechanical Quadrature Methods and Extrapolation for Solving Nonlinear Problems in Elasticity
Accession number: 20182505343982
Authors: Cheng, Pan (1); Zhang, Ling (1)
Author affiliation: (1) School of Mathematics and Statistics, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: Cheng, Pan(cheng_pass@sina.com)
Source title: Mathematical Problems in Engineering
Abbreviated source title: Math. Probl. Eng.
Volume: 2018
Issue date: 2018
Publication year: 2018
Article number: 6932164
Language: English
ISSN: 1024123X
E-ISSN: 15635147
Document type: Journal article (JA)
Publisher: Hindawi Limited, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States
Abstract: This paper will study the high accuracy numerical solutions for elastic equations with nonlinear boundary value conditions. The equations will be converted into nonlinear boundary integral equations by the potential theory, in which logarithmic singularity and Cauchy singularity are calculated simultaneously. Mechanical quadrature methods (MQMs) are presented to solve the nonlinear equations where the accuracy of the solutions is of three orders. According to the asymptotical compact convergence theory, the errors with odd powers asymptotic expansion are obtained. Following the asymptotic expansion, the accuracy of the solutions can be improved to five orders with the Richardson extrapolation. Some results are shown regarding these approximations for problems by the numerical example. ? 2018 Pan Cheng and Ling Zhang.
Number of references: 24
Main heading: Nonlinear equations
Controlled terms: Asymptotic analysis - Boundary integral equations - Extrapolation
Uncontrolled terms: Asymptotic expansion - Logarithmic singularity - Mechanical quadrature methods - Nonlinear boundary integral equations - Nonlinear boundary value conditions - Nonlinear problems - Numerical solution - Richardson extrapolation
Classification code: 921 Mathematics
Mathematics
DOI: 10.1155/2018/6932164
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
3. Mechanical Fault Diagnosis Method Based on LMD Shannon Entropy and Improved Fuzzy C-means Clustering
Accession number: 20172603862487
Authors: Dong, Shaojiang (1, 2); Xu, Xiangyang (2, 3); Luo, Jiayuan (2)
Author affiliation: (1) School of Automation, Chongqing University, Chongqing; 400044, China; (2) School of Mechatronics and Automotive Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (3) College of Optoelectronic Engineering, Chongqing University, 400044, China
Source title: International Journal of Acoustics and Vibrations
Abbreviated source title: Int. J. Acoust. Vibr.
Volume: 22
Issue: 2
Issue date: June 2017
Publication year: 2017
Pages: 211-217
Language: English
ISSN: 10275851
Document type: Conference article (CA)
Publisher: International Institute of Acoustics and Vibrations, P O Box 13, Auburn, AL 36831, United States
Abstract: Aiming to diagnosis the mechanical fault precisely, the current research is proposing a method based on the local mean decomposition (LMD) Shannon entropy and improved fuzzy f-means flustering (IFCM). The features are first extracted by using the time-frequency domain method LMD and the Shannon entropy is used to process the original separated product functions (PF) so as to extract the original features. However, the extracted original features are still with high dimensional and include superfluous information. The nonlinear multi-features fusion technique LTSA is used to merge the features and reduce the dimension. Then, based on the extracted features, the IFCM model is used to achieve the mechanical fault diagnosis. In this model, a feature cluster determine function is established to achieve the weighted factor to achieve a better category effect. Case of a bearing test was analyzed and the results proved the effectiveness of the methodology.
Number of references: 13
Main heading: Fault detection
Controlled terms: Failure analysis - Frequency domain analysis
Uncontrolled terms: High-dimensional - Improved fuzzy c-means clustering - Local mean decomposition (LMD) - Mechanical fault diagnosis - Mechanical faults - Multi-features fusions - Product functions - Time frequency domain
Classification code: 921.3 Mathematical Transformations
Mathematical Transformations
DOI: 10.20855/ijav.2017.22.2466
Funding Details: Number; Acronym; Sponsor: 51405047; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 51405048; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
4. Microstructural characterization of dynamic recrystallization in hot deformed LDX2101
Accession number: 20182505341083
Authors: Fang, Yiliu (1); Gao, Zhengyuan (1); Bai, Wanjin (1); Sun, Pengfei (1)
Author affiliation: (1) School of Mechanotronics and Vehicle Engineering, Chongqing Jiaotong University, Xuefu Avenue No.66, Nan’an District Chongqing; 400074, China
Corresponding author: Fang, Yiliu(fangyiliu@sina.com)
Source title: International Journal of Materials Research
Abbreviated source title: Int. J. Mater. Res.
Volume: 109
Issue: 6
Issue date: June 2018
Publication year: 2018
Pages: 485-493
Language: English
ISSN: 18625282
Document type: Journal article (JA)
Publisher: Carl Hanser Verlag, Kolbergerstrasse 22, Munchen, D-81679, Germany
Abstract: The deformation behavior and dynamic recrystallization (DRX) mechanism of lean duplex stainless steel 2101 under hot compression were studied by means of optical microscopy and electron backscatter diffraction. Hot compression tests were performed at a temperature of 1 100 8C and strain rate of 0.01 s–1, and also at a temperature of 1 000 8C and strain rate of 30 s–1. The flow curves exhibit typical DRX characteristics, and the flow stress increases to a peak stress followed by work softening at higher strains. When the alloy was deformed at 1 000 8C and the strain rate of 30 s–1, new ferrite grains formed through a distinct DRX mechanism occurring in the vicinity of the d/c interface. When the alloy was deformed at 1 100 8C and strain rate of 0.01 s–1, a small number of fine c phase grains distributed both in the d ferrite matrix and at d/c interfaces. The refinement of c phase was expected to form by dynamic strain induced d to c transformation and discontinuous dynamic re-crystallisation (DDRX) mechanisms. ? Carl Hanser Verlag GmbH & Co. KG.
Number of references: 30
Main heading: Strain rate
Controlled terms: Compression testing - Crystal microstructure - Dynamic recrystallization - Dynamics - Ferrite - Hot pressing - Stainless steel
Uncontrolled terms: Deformation behavior - Dynamic recrystallization (DRX) - Electron back scatter diffraction - Ferrite matrix - Lean duplex stainless steel - Micro-structural characterization - Stress increase - Work softening
Classification code: 531.1 Metallurgy
Metallurgy
- 531.2 Metallography
Metallography
- 545.3 Steel
Steel
- 933.1.1 Crystal Lattice
Crystal Lattice
DOI: 10.3139/146.111632
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
5. Bolt Detection Signal Analysis Method Based on ICEEMD
Accession number: 20182505347190
Authors: Guo, Chunhui (1, 2); Zhang, Zhan (1); Xie, Xin (3); Yang, Zhengyu (3)
Author affiliation: (1) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China; (2) Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing, China; (3) Department of Electrical and Computer Engineering, Northeastern University, Boston; MA, United States
Corresponding author: Zhang, Zhan(zhanzhang_hhu@qq.com)
Source title: Shock and Vibration
Abbreviated source title: Shock Vib
Volume: 2018
Issue date: 2018
Publication year: 2018
Article number: 1590983
Language: English
ISSN: 10709622
CODEN: SHVIE8
Document type: Journal article (JA)
Publisher: Hindawi Limited, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States
Abstract: The construction quality of the bolt is directly related to the safety of the project, and, as such, it must be tested. In this paper, the improved complete ensemble empirical mode decomposition (ICEEMD) method is introduced to the bolt detection signal analysis. The ICEEMD is used in order to decompose the anchor detection signal according to the approximate entropy of each intrinsic mode function (IMF). The noise of the IMFs is eliminated by the wavelet soft threshold denoising technique. Based on the approximate entropy and the wavelet denoising principle, the ICEEMD-De anchor signal analysis method is proposed. From the analysis of the vibration analog signal, as well as the bolt detection signal, the result shows that the ICEEMD-De method is capable of correctly separating the different IMFs under noisy conditions and also that the IMF can effectively identify the reflection signal of the end of the bolt. ? 2018 Chunhui Guo et al.
Number of references: 38
Main heading: Signal detection
Controlled terms: Bolts - Entropy - Signal analysis - Vibration analysis
Uncontrolled terms: Analysis method - Approximate entropy - Construction quality - Detection signal - Ensemble empirical mode decomposition - Intrinsic Mode functions - Noisy conditions - Wavelet denoising
Classification code: 605 Small Tools and Hardware
Small Tools and Hardware
- 641.1 Thermodynamics
Thermodynamics
- 716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
DOI: 10.1155/2018/1590983
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
6. Evaluation of water resource security based on an MIV-BP model in a Karst Area
Accession number: 20182505343729
Authors: Liu, Liying (1, 2); Guan, Dongjie (3, 4); Yang, Qingwei (1)
Author affiliation: (1) College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) College of Mathematics and Statistics, Chongqing Technology and Business University, Chongqing; 400067, China; (3) College of Architecture and Urban Planning, Chongqing Jiaotong University, Chongqing; 400074, China; (4) Key Laboratory of Mountain Town Construction and New Technology, Ministry of Education, Chongqing University, Chongqing; 400045, China
Corresponding author: Guan, Dongjie(guandongjie_2000@163.com)
Source title: Water (Switzerland)
Abbreviated source title: Water
Volume: 10
Issue: 6
Issue date: June 14, 2018
Publication year: 2018
Article number: 786
Language: English
E-ISSN: 20734441
Document type: Journal article (JA)
Publisher: MDPI AG, Postfach, Basel, CH-4005, Switzerland
Abstract: Evaluation of water resource security deserves particular attention in water resource planning and management. A typical karst area in Guizhou Province, China, was used as the research area in this paper. First, based on data from Guizhou Province for the past 10 years, the mean impact value-back propagation (MIV-BP) model was used to analyze the factors influencing water resource security in the karst area. Second, 18 indices involving five aspects, water environment subsystem, social subsystem, economic subsystem, ecological subsystem, and human subsystem, were selected to establish an evaluation index of water resource security. Finally, a BP artificial neural network model was constructed to evaluate the water resource security of Guizhou Province from 2005 to 2014. The results show that water resource security in Guizhou, which was at a moderate warning level from 2005 to 2009 and a critical safety level from 2010 to 2014, has generally improved. Groundwater supply ratio, industrial water utilization rate, water use efficiency, per capita grain production, and water yield modulus were the obstacles to water resource security. Driving factors were comprehensive utilization rate of industrial solid waste, qualifying rate of industrial wastewater, above moderate rocky desertification area ratio, water requirement per unit gross domestic product (GDP), and degree of development and utilization of groundwater. Our results provide useful suggestions on the management of water resource security in Guizhou Province and a valuable reference for water resource research. ? 2018 by the authors.
Number of references: 25
Main heading: Network security
Controlled terms: Backpropagation - Data flow analysis - Groundwater - Groundwater resources - Landforms - Neural networks - Rain - Water management
Uncontrolled terms: BP artificial neural network models - BP neural networks - Comprehensive utilizations - Development and utilizations - Gross domestic products - Karst - Water resource planning - Water resource securities
Classification code: 443.3 Precipitation
Precipitation
- 444.2 Groundwater
Groundwater
- 481.1 Geology
Geology
- 723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
- 723.4 Artificial Intelligence
Artificial Intelligence
Numerical data indexing: Age 1.00e+01yr
DOI: 10.3390/w10060786
Funding Details: Number; Acronym; Sponsor: 41201546; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 41261038; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
7. Oblivious Transfer Based on NTRUEncrypt
Accession number: 20182505341645
Authors: Mi, Bo (1); Huang, Darong (1); Wan, Shaohua (2); Mi, Libo (3); Cao, Jianqiu (1)
Author affiliation: (1) Institute of Information Science and Engineering, Chongqing Jiaotong University, Chongqing, 400074 China.; (2) School of Information and Safety Engineering, Zhongnan University of Economics and Law, Wuhan, 430073 China.; (3) Modern Education Technology Centre, Chongqing University of Arts and Science, Yongchuan, 402160 China.
Source title: IEEE Access
Abbreviated source title: IEEE Access
Issue date: June 12, 2018
Publication year: 2018
Language: English
E-ISSN: 21693536
Document type: Article in Press
Publisher: Institute of Electrical and Electronics Engineers Inc.
Abstract: Oblivious transfer (OT) is the most fundamental process in cryptosystems and serves as the basic building block for implementing protocols such as the secure multi-party computation and the fair electronic contract. However, since most implementations of the Internet of Things (IoT) are time-sensitive, existing works that are based on traditional public cryptosystems are not efficient or secure under quantum machine attacks. In this paper, we argued that the fastest known 1-out-of-n oblivious transfer (OTn1) protocol, which was proposed by Chou, cannot achieve semantic security and is time-consuming due to exponent arithmetic of large parameters. Utilizing NTRUEncrypt and OT extension, we devised a 1-round post-quantum secure OTn1 protocol that is also proved to be active and adaptively secure under the universal composability (UC) framework. Compared with Chou’s protocol, the computational overheads of our scheme are approximately 6 and 1.7 times smaller on the sender and receiver sides, in line with the standard security level. OAPA
Main heading: Quantum efficiency
Controlled terms: Computational efficiency - Cryptography - Internet of things - Network protocols - Quantum cryptography - Receivers (containers) - Semantics - Uranium compounds
Uncontrolled terms: Computational model - NTRUEncrypt - Oblivious transfer - Random Oracle - Universal composability
Classification code: 723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
- 931.4 Quantum Theory; Quantum Mechanics
Quantum Theory; Quantum Mechanics
DOI: 10.1109/ACCESS.2018.2846798
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
8. Oxidation and erosion resistance of multi-layer SiC nanowires reinforced SiC coating prepared by CVD on C/C composites in static and aerodynamic oxidation environments
Accession number: 20182505340305
Authors: Qiang, Xinfa (1); Li, Hejun (2); Liu, Yunfan (1); Zhang, Nan (1); Li, Xin (1); Tian, Song (3); Cong, Yuan (1)
Author affiliation: (1) Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing; 211167, China; (2) State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an; 710072, China; (3) School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: Li, Hejun(lihejun@nwpu.edu.cn)
Source title: Ceramics International
Abbreviated source title: Ceram Int
Issue date: 2018
Publication year: 2018
Language: English
ISSN: 02728842
CODEN: CINNDH
Document type: Article in Press
Publisher: Elsevier Ltd
Abstract: A multi-layer SiC nanowires reinforced SiC (SiCnws-SiC) coating was prepared in-situ on carbon/carbon (C/C) composites by three chemical vapor deposition (CVD) processes. The microstructure and phase composition of the nanowires fabricated on the first-layer SiCnws-SiC coating and the coatings were examined by SEM, TEM, and XRD. The bamboo-like SiC nanowires with a 50 nm diameter and a length of several tens of micrometers are straight, randomly orientated and distributed like a net on the first-layer SiCnws-SiC coating. The growth direction is [111], and the growth mechanism is VS. The multi-layer SiCnws-SiC coating has three layers: the thickness of the first-layer is roughly 400 μm, and the outer two layers are about 200 μm. Each layer has a sandwich structure. The isothermal oxidation and erosion resistance of the multi-layer SiCnws-SiC coating were investigated in an electrical furnace and a high temperature wind tunnel. The results indicated that the weight loss of the multi-layer SiCnws-SiC coated C/C composites was only 1.8% after oxidation in static air at 1773 K for 361 h. Further, the coated sample failed due to fracture of the coating at the clamping position (i.e. 80 mm) after erosion at 1873 K for 130 h in the wind tunnel. The weight loss of the coated C/C composites occurred due to the formation of penetrating cracks in the coating during the oxidation thermal shock. The maximum bending moment and the larger clamping force caused the coating fracture and resulted in intense oxidation of the substrate and the failure of the specimen. ? 2018 Elsevier Ltd and Techna Group S.r.l.
Main heading: Silicon compounds
Controlled terms: Carbon carbon composites - Chemical vapor deposition - Coatings - Erosion - Fracture - Microstructure - Nanowires - Oxidation - Reinforcement - Silicon carbide - Wind tunnels
Uncontrolled terms: Chemical vapor depositions (CVD) - Clamping positions - Erosion resistance - Isothermal oxidations - Maximum bending moments - Oxidation environment - SiC coatings - SiC nanowire
Classification code: 415.4 Structural Materials Other Than Metal, Plastics or Wood
Structural Materials Other Than Metal, Plastics or Wood
- 651.2 Wind Tunnels
Wind Tunnels
- 761 Nanotechnology
Nanotechnology
- 802.2 Chemical Reactions
Chemical Reactions
- 804.2 Inorganic Compounds
Inorganic Compounds
- 813.2 Coating Materials
Coating Materials
- 933 Solid State Physics
Solid State Physics
- 951 Materials Science
Materials Science
Numerical data indexing: Percentage 1.80e+00%, Size 5.00e-08m, Size 8.00e-02m, Temperature 1.77e+03K, Temperature 1.87e+03K, Time 1.30e+06s, Time 4.68e+05s
DOI: 10.1016/j.ceramint.2018.06.005
Funding Details: Number; Sponsor: 2018M631190; China Postdoctoral Science Foundation - Number; Sponsor: BK20150727; Natural Science Foundation of Jiangsu Province
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
9. L$_{ 2} $L$_{ \ infin} $ Output Feedback Controller Design for Fuzzy Systems Over Switching Parameters
Accession number: 20182505346226
Authors: Su, Xiaojie (1); Xia, Fengqin (2); Song, Yong-Duan (3); Basin, Michael (4); Zhao, Ling (5)
Author affiliation: (1) College of Automation, Chongqing University, Chongqing China 400044 (e-mail: suxiaojie@cqu.edu.cn); (2) College of Automation, Chongqing University, 47913 Chongqing, Chongqing China (e-mail: xiafengqin@cqu.edu.cn); (3) School of Automation, Chongqing University, Chongqing China (e-mail: ydsong@bjtu.edu.cn); (4) Physical and Mathematical Sciences, Autonomous University of Nuevo Leon, San Nicolas de los Garza, Nuevo Leon Mexico 66450 (e-mail: mbasin@fcfm.uanl.mx); (5) School of Computer Science and Technology, Chongqing Jiaotong University, 47912 Chongqing, Sichuan China (e-mail: zhao.ling@163.com)
Source title: IEEE Transactions on Fuzzy Systems
Abbreviated source title: IEEE Trans Fuzzy Syst
Issue date: June 16, 2018
Publication year: 2018
Language: English
ISSN: 10636706
CODEN: IEFSEV
Document type: Article in Press
Publisher: Institute of Electrical and Electronics Engineers Inc.
Abstract: This paper focuses on the problem of $\ mathcal{ L} _{ 2} $-$\ mathcal{ L} _{ \ infty} $ dynamic output feedback controller design for nonlinear switched systems with nonlinear perturbations in the Takagi-Sugeno fuzzy framework. First, the average dwell time approach is used to stabilize a nonlinear switched system exponentially under an arbitrary switching law. Then, based on the technique of piecewise Lyapunov functions, a fuzzy-rule-dependent dynamic output feedback controller is designed to ensure that the overall closed-loop system is exponentially stable with a weighted $\ mathcal{ L} _{ 2} $-$\ mathcal{ L} _{ \ infty} $ performance level $\ left(\ gamma,\ alpha \ right)$. The solvability condition for the desired dynamic output feedback controller is derived using a linearization technique. It is shown that the controller parameters can be obtained as solutions to a set of strict linear matrix inequalities that are numerically solvable with available standard software. Finally, two simulation examples illustrate effectiveness of the developed technique, including cognitive-radio systems. IEEE
Main heading: Controllers
Controlled terms: Closed loop systems - Cognitive radio - Cognitive systems - Control system analysis - Distributed parameter control systems - Feedback control - Feedback linearization - Fuzzy control - Fuzzy inference - Fuzzy systems - Linear matrix inequalities - Lyapunov functions - Radio systems
Uncontrolled terms: Average dwell-time approach - Dynamic output feedback controller - Nonlinear perturbations - Nonlinear switched systems - Output feedback controller - Output feedback controls - Piecewise Lyapunov functions - Relaxed stabilities
Classification code: 716.3 Radio Systems and Equipment
Radio Systems and Equipment
- 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
- 731 Automatic Control Principles and Applications
Automatic Control Principles and Applications
- 731.1 Control Systems
Control Systems
- 732.1 Control Equipment
Control Equipment
- 921 Mathematics
Mathematics
- 921.1 Algebra
Algebra
- 961 Systems Science
Systems Science
DOI: 10.1109/TFUZZ.2018.2848652
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
10. Climate effects in data envelopment analysis for residential energy performance benchmarking: An empirical case validation
Accession number: 20182505347913
Authors: Wang, Endong (1); Mao, Peng (2); Chen, Min (3); Zhang, Xiaodong (4); Li, Lingzhi (5)
Author affiliation: (1) College of Engineering and Computer Science, Univ. of Tennessee at Chattanooga, 615 McCallie Ave., Chattanooga; TN; 37403, United States; (2) College of Civil Engineering, Nanjing Forestry Univ., 159 Longpan Rd., Nanjing; 210037, China; (3) School of Civil and Architecture Engineering, Nantong Univ., 9 Seyuan Rd., Nantong; 226019, China; (4) College of Civil Engineering, Chongqing Jiaotong Univ., 66 Xuefu Rd., Congqing; 400074, China; (5) School of Civil Engineering, Southeast Univ., 2 Sipailou Rd., Nanjing; 210096, China
Source title: Construction Research Congress 2018: Sustainable Design and Construction and Education - Selected Papers from the Construction Research Congress 2018
Abbreviated source title: Constr. Res. Congr.: Sustain. Des. Constr. Educ. - Sel. Pap. Constr. Res. Congr.
Volume: 2018-April
Part number: 1 of 1
Issue title: Construction Research Congress 2018: Sustainable Design and Construction and Education - Selected Papers from the Construction Research Congress 2018
Issue date: 2018
Publication year: 2018
Pages: 319-328
Language: English
ISBN-13: 9780784481301
Document type: Conference article (CA)
Conference name: Construction Research Congress 2018: Sustainable Design and Construction and Education, CRC 2018
Conference date: April 2, 2018 - April 4, 2018
Conference location: New Orleans, LA, United states
Conference code: 135435
Sponsor: Construction Institute (CI) of the American Society of Civil Engineers (ASCE); Construction Research Council
Publisher: American Society of Civil Engineers (ASCE)
Abstract: Reinforced fault diagnosis to discover inefficiency sources on energy performance of residential systems is critical for taking targeted retrofitting measures to enhance the effectiveness of energy upgrading investments. Data-driven energy benchmarking through nonparametric data envelopment analysis (DEA) has been classically adopted to locate malfunctions of energy systems with its unique capability of isolating the effects of diverse factors to differentiate overall efficiency, scale efficiency, and management efficiency. Nevertheless, extant works tend to subjectively process climate effects which could result in errors during DEA. This paper provides an empirical case to examine the reliability of two candidate methods on handling climate factors in residential energy efficiency evaluation, including the normalization-based and the weighting-based approaches. By investigating the performance of 70 single-family homes within a 3-year dynamic context, the improved robustness of normalization-based DEA approach is observed with statistical testing. It shows that the overall relative low energy efficiency is mainly due to poor management. This research intends to benefit retrofitting managers to make solid decisions. ? 2018 ASCE.
Number of references: 10
Main heading: Energy efficiency
Controlled terms: Benchmarking - Data envelopment analysis - Fault detection - Housing - Information management - Investments - Retrofitting - Sustainable development
Uncontrolled terms: Climate - Energy benchmarking - Energy performance - Management efficiency - Residential energy - Residential energy efficiency - Residential systems - Statistical testing
Classification code: 403.1 Urban Planning and Development
Urban Planning and Development
- 525.2 Energy Conservation
Energy Conservation
- 913.5 Maintenance
Maintenance
- 922 Statistical Methods
Statistical Methods
Numerical data indexing: Age 3.00e+00yr
DOI: 10.1061/9780784481301.032
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
11. Progressive graph-based transductive learning for multi-modal classification of brain disorder disease
Accession number: 20164803056061
Authors: Wang, Zhengxia (1, 2); Zhu, Xiaofeng (1); Adeli, Ehsan (1); Zhu, Yingying (1); Zu, Chen (1); Nie, Feiping (3); Shen, Dinggang (1); Wu, Guorong (1)
Author affiliation: (1) Department of Radiology and BRIC, University of North Carolina at Chapel Hill, Chapel Hill; NC; 27599, United States; (2) Department of Information Science and Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (3) School of Computer Science and OPTIMAL Center, Northwestern Polytechnical University, Xi’an; 710072, China
Corresponding author: Wu, Guorong(grwu@med.unc.edu)
Source title: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Abbreviated source title: Lect. Notes Comput. Sci.
Volume: 9900 LNCS
Part number: 1 of 3
Issue title: Medical Image Computing and Computer-Assisted Intervention - MICCAI 2016 - 19th International Conference, Proceedings
Issue date: 2016
Publication year: 2016
Pages: 291-299
Language: English
ISSN: 03029743
E-ISSN: 16113349
ISBN-13: 9783319467191
Document type: Conference article (CA)
Conference name: 1st International Workshop on Simulation and Synthesis in Medical Imaging, SASHIMI 2016 held in conjunction with 19th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2016
Conference date: October 21, 2016 - October 21, 2016
Conference location: Athens, Greece
Conference code: 185759
Publisher: Springer Verlag
Abstract: Graph-based Transductive Learning (GTL) is a powerful tool in computer-assisted diagnosis,especially when the training data is not sufficient to build reliable classifiers. Conventional GTL approaches first construct a fixed subject-wise graph based on the similarities of observed features (i.e.,extracted from imaging data) in the feature domain,and then follow the established graph to propagate the existing labels from training to testing data in the label domain. However,such a graph is exclusively learned in the feature domain and may not be necessarily optimal in the label domain. This may eventually undermine the classification accuracy. To address this issue,we propose a progressive GTL (pGTL) method to progressively find an intrinsic data representation. To achieve this,our pGTL method iteratively (1) refines the subject-wise relationships observed in the feature domain using the learned intrinsic data representation in the label domain,(2) updates the intrinsic data representation from the refined subject-wise relationships,and (3) verifies the intrinsic data representation on the training data,in order to guarantee an optimal classification on the new testing data. Furthermore,we extend our pGTL to incorporate multi-modal imaging data,to improve the classification accuracy and robustness as multi-modal imaging data can provide complementary information. Promising classification results in identifying Alzheimer’s disease (AD),Mild Cognitive Impairment (MCI),and Normal Control (NC) subjects are achieved using MRI and PET data. ? Springer International Publishing AG 2016.
Number of references: 11
Main heading: Classification (of information)
Controlled terms: Computer aided diagnosis - Computer aided instruction - Disease control - Graphic methods - Image processing - Iterative methods - Medical computing - Medical imaging
Uncontrolled terms: Brain disorders - Classification accuracy - Classification results - Computer assisted diagnosis - Mild cognitive impairments (MCI) - Multi-modal imaging - Optimal classification - Transductive learning
Classification code: 461.1 Biomedical Engineering
Biomedical Engineering
- 716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
- 723.5 Computer Applications
Computer Applications
- 746 Imaging Techniques
Imaging Techniques
- 921.6 Numerical Methods
Numerical Methods
DOI: 10.1007/978-3-319-46720-7_34
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
12. Study on the Day-Based Work Zone Scheduling Problem in Urban Road Networks Based on the Day-to-Day Traffic Assignment Model
Accession number: 20182505354839
Authors: Yang, Da (1, 2); Zhao, Xinpeng (1); Chen, Yuting (1); Zhang, Xi (3); Chen, Chongshuang (4)
Author affiliation: (1) School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, China; (2) Traffic Management Research Institute of the Ministry of Public Security, Wuxi, China; (3) School of Transportation, Chongqing Jiaotong University, Chongqing, China; (4) School of Mathematics, Southwest Jiaotong University, Chengdu, China
Corresponding author: Chen, Chongshuang(ccsmars@swjtu.edu.cn)
Source title: Transportation Research Record
Abbreviated source title: Transp Res Rec
Issue date: June 1, 2018
Publication year: 2018
Language: English
ISSN: 03611981
E-ISSN: 21694052
CODEN: TRREDM
Document type: Article in Press
Publisher: SAGE Publications Ltd
Abstract: Many work zones exist in the urban road network and have a great negative impact on city traffic. Finding the optimal work zone schedule can minimize the negative impact of work zones on traffic. This paper focuses on the day-based work zone scheduling problem in the urban network. Existing studies on the day-based work zone scheduling problem do not consider the progression of day-to-day traffic from a non-equilibrium state to an equilibrium state during the construction period. For the first time, this paper proposes a model for day-based work zone scheduling by introducing a day-to-day traffic assignment model, in which the target of the optimization problem is minimizing the increase in travel cost caused by work zones. Numerical examples are presented to explore the variations of the optimal construction sequence for different work durations, crew numbers, and model parameter values. Some new findings are obtained in the paper. When the construction duration of each work zone is relatively short (for example, less than 20 days), the optimal scheduling will obviously change with the work duration; when all of the construction durations increase to a threshold (for example, 60 days), the optimal construction sequence will no longer change. An optimal crew number exists that can minimize the increment of travel cost caused by work zones. During the construction period, the total travel cost in the network can be decreased by guiding travelers to change their original travel habits. ? 2018, National Academy of Sciences: Transportation Research Board 2018.
Main heading: Traffic control
Controlled terms: Construction - Costs - Motor transportation - Roads and streets - Scheduling
Uncontrolled terms: Construction duration - Construction period - Nonequilibrium state - Optimal construction - Optimization problems - Scheduling problem - Traffic assignment models - Urban road networks
Classification code: 405 Construction Equipment and Methods; Surveying
Construction Equipment and Methods; Surveying
- 406.2 Roads and Streets
Roads and Streets
- 911 Cost and Value Engineering; Industrial Economics
Cost and Value Engineering; Industrial Economics
- 912.2 Management
Management
Numerical data indexing: Age 1.64e-01yr, Age 5.48e-02yr
DOI: 10.1177/0361198118757982
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
13. Research on Value of Tangential Restitution Coefficient for Rockfall Collision
Accession number: 20182505336063
Authors: Ye, Siqiao (1, 2); Gong, Shangqing (1); Wang, Linfeng (1); Xie, Tao (1); Wang, Zongjian (1)
Author affiliation: (1) Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Postdoctoral Workstation, Chongqing Bureau of Geology and Minerals Exploration, Chongqing; 401121, China
Source title: Zhongguo Tiedao Kexue/China Railway Science
Abbreviated source title: Zhongguo Tiedao Kexue
Volume: 39
Issue: 1
Issue date: January 1, 2018
Publication year: 2018
Pages: 8-15
Language: Chinese
ISSN: 10014632
Document type: Journal article (JA)
Publisher: Chinese Academy of Railway Sciences
Abstract: The value of tangential restitution coefficient is the key parameter for calculating rockfall trajectories and designing passive protection systems. The tangential restitution coefficients were studied through rockfall collision tests under different conditions of slope, the shape and mass of rockfall. Results show that the tangential restitution coefficient is basically not affected by the shape of rockfall, and is obviously influenced by rockfall mass, slope conditions, gradient and falling height. The tangential restitution coefficient increases gradually as the slope changes from soft to hard or as the rockfall mass increases, and it decreases gradually with the increase of slope gradient or falling height. Most of the tangential restitution coefficients under various test conditions are above 0.4, which accounts for 98% of the total number of tests. The coefficients above 0.5 account for 93% of the total and those above 0.9 account for 25%, which indicates that the loss of tangential velocity is limited in the collision process. In the current simulation of rockfall movement path, the value of the existing tangential restitution coefficient is too small in some cases, which may lead to the lack of safety reserve in passive protection design. The suggested values for tangential restitution coefficients under various conditions are proposed by comprehensively considering slope state and gradient. It is suggested that higher value should be adopted when the slope is harder and the gradient is smaller. Otherwise, smaller value in the interval is taken or the interval random value is used directly. ? 2018, Editorial Department of China Railway Science. All right reserved.
Number of references: 17
Main heading: Rock bursts
Controlled terms: Mechanical engineering
Uncontrolled terms: Current simulation - Model tests - Passive protection - Passive protection systems - Restitution coefficient - Rockfall trajectory - Rockfalls - Tangential velocities
Classification code: 502.1 Mine and Quarry Operations
Mine and Quarry Operations
- 608 Mechanical Engineering, General
Mechanical Engineering, General
Numerical data indexing: Percentage 2.50e+01%, Percentage 9.30e+01%, Percentage 9.80e+01%
DOI: 10.3969/j.issn.1001-4632.2018.01.02
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
14. Influence of waste glass powder usage on the properties of alkali-activated slag mortars based on response surface methodology
Accession number: 20182505322131
Authors: Zhang, Lanfang (1); Yue, Yu (2)
Author affiliation: (1) School of Material Science & Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Chongqing Iron & Steel Group Construction Engineering Co.LTD, Chongqing; 400045, China
Corresponding author: Zhang, Lanfang(yyzhanglf@163.com)
Source title: Construction and Building Materials
Abbreviated source title: Constr Build Mater
Volume: 181
Issue date: 30 August 2018
Publication year: 2018
Pages: 527-534
Language: English
ISSN: 09500618
CODEN: CBUMEZ
Document type: Journal article (JA)
Publisher: Elsevier Ltd
Abstract: In this study, the effect of waste glass powder as a potential cementitious material on the strength, drying shrinkage and sulfate attack resistance of slag mortar activated by the mixture of water glass and sodium hydroxide was evaluated. Also, Central composite design and response surface method were used for the optimisation of the alkali content (sodium oxide equivalent) and replacement ratio of waste glass powder by maximising flexural and compressive strengths. The results of analysis of variance (ANOVA) indicated that the accuracy of the developed strength models based on response surface method was satisfactory. The optimal alkali content and replacement ratio of waste glass powder were found to be 8.31% and 14.57%, respectively. Under this condition, the experimental values of 3-, 7- and 28-day flexural strengths and 3-, 7- and 28-day compressive strengths of alkali-activated slag/glass powder mortar were 6.6 MPa, 7.1 MPa and 8.4 MPa, respectively and 49.2 MPa, 52.9 MPa and 66.4 MPa, respectively, which agreed closely with the predicted values since the percentages of error were negligible in the range of 0–2.38%. When the alkali content was 8.31%, the addition of 14.57% waste glass powder in alkali-activated slag mortar could improve the 3-, 7- and 28-day flexural and compressive strengths, reduce the dry shrinkage by up to 15.8% at 1 day and 20.3% at 120 days, and increase the resistance to sulfate attack. ? 2018 Elsevier Ltd
Number of references: 48
Main heading: Analysis of variance (ANOVA)
Controlled terms: Compressive strength - Glass - Mortar - Optimization - Shrinkage - Slags - Sodium hydroxide - Sulfur compounds - Surface properties
Uncontrolled terms: Alkali activation - Dry shrinkage - Glass Powder - Response surface methodology - Strength - Sulfate attack
Classification code: 414.3 Mortar (Before 1993, use code 412)
Mortar (Before 1993, use code 412)
- 812.3 Glass
Glass
- 921.5 Optimization Techniques
Optimization Techniques
- 922 Statistical Methods
Statistical Methods
- 951 Materials Science
Materials Science
Numerical data indexing: Age 2.74e-03yr, Age 3.29e-01yr, Age 7.67e-02yr, Percentage 1.46e+01%, Percentage 1.58e+01%, Percentage 2.03e+01%, Percentage 8.31e+00%, Pressure 4.92e+07Pa, Pressure 5.29e+07Pa, Pressure 6.60e+06Pa, Pressure 6.64e+07Pa, Pressure 7.10e+06Pa, Pressure 8.40e+06Pa
DOI: 10.1016/j.conbuildmat.2018.06.040
Funding Details: Number; Acronym; Sponsor: (Grant NO. 51502029); NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
