一、SCI 5条
*Record 1 of 5. Search terms matched: CHONGQING JIAOTONG(2)
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Title:Verification of the Kaiser Effect in Rocks under Tensile Stress: Experiment Using the Brazilian Test
Authors:Chen, YL; Irfan, M; Song, CP
Author Full Names:Chen, Yulong; Irfan, Muhammad; Song, Chenpeng
Source:INTERNATIONAL JOURNAL OF GEOMECHANICS, 18(7):10.1061/(ASCE)GM.1943-5622.0001181JUL 2018
Language:English
Abstract: For many aspects of rock engineering, it is important to measure the in situ stresses, not only under compression but also under tension. Brazilian tests were performed to generate tensile stress in granite samples. The granite was obtained from the Beishan site, a potential high-level radioactive waste repository area in China. In this study, Brazilian testing was performed on the Beishan granite samples via cyclic loading, increasing the magnitude of the stress either every cycle or every other cycle. This allowed for assessment of the Kaiser effect method's reliability in evaluating the tensile stress of a sample. The experimental results confirm the existence of the Kaiser effect in rocks under tensile stress. The Kaiser effect was obvious when the pre-existing stress was smaller than the crack damage stress and was ambiguous when the pre-existing stress exceeded the crack damage stress, after which cracks began to propagate and coalesce in an unstable manner. The felicity ratio values associated with the stress and mechanical parameters consistently decreased with increasing pre-existing stress. (C) 2018 American Society of Civil Engineers.
ISSN:1532-3641
eISSN:1943-5622
Article Number:04018059
IDS Number:GF8WO
Unique ID: WOS:000432256900015
*Record 2 of 5. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
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Title:Characteristic and mechanism of structural acoustic radiation for box girder bridge in urban rail transit
Authors:Zhang, XA; Zhai, WM; Chen, ZW; Yang, JJ
Author Full Names:Zhang, Xiaoan; Zhai, Wanming; Chen, Zhaowei; Yang, Jianjin
Source:SCIENCE OF THE TOTAL ENVIRONMENT, 6271303-1314; 10.1016/j.scitotenv.2018.01.297JUN 15 2018
Language:English
Abstract: Noise caused by urban rail transit (URT) has been a hot concerned issue for a long time, and the secondary noise caused by viaduct bridges even make the problem more serious. As well known, structural acoustic radiation (SAR) induced by vibrations of concrete bridges is usually in low frequency. By now, the existing studies mainly focused on the noise above 20 Hz, while the infrasonic wave below 20 Hz attracts few investigations. However, it is more harmful to human according to relevant medical researches. Focusing on the viaduct bridges in a URT line laid with floating-slab track (FST), the characteristic and mechanism of SAR caused by box girder bridges are investigated in this paper. Primarily, a detailed train-FST-bridge dynamic interaction model is established, which is solved through an advanced mixed explicit-implicit integration method. Then, the SAR of the concerned bridge is analyzed adopting indirect boundary element method, including the infrasonic wave below 20 Hz. And finally the mechanism of SAR is investigated based on the theories of structural vibration and acoustic. The conclusions provide theoretical foundation of vibration and noise reduction for viaduct bridges in URT systems. (C) 2018 Elsevier B.V. All rights reserved.
ISSN:0048-9697
eISSN:1879-1026
IDS Number:GF3IV
Unique ID: WOS:000431848500123
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Title:Effect of fuel injection rate shapes on mixture formation and combustion characteristic in a free-piston diesel engine generator
Authors:Han, CJ; Yuan, CH; He, YT; Liu, Y
Author Full Names:Han, Cuijie; Yuan, Chenheng; He, Yituan; Liu, Yang
Source:ADVANCES IN MECHANICAL ENGINEERING, 10(5):10.1177/1687814018775242MAY 17 2018
Language:English
Abstract: The free-piston engine generator is a new power machinery, which removes the crank-shaft mechanism. This article aims to study the impact of different injection rate shapes (left triangle, rectangle, and right triangle) on the free-piston engine generator spray and combustion characteristics. An iteration numerical model was established and validated by experiment. The results reveal that there is a positive correlation between injection rate and evaporation rate, and the faster evaporation rate is more conducive to total evaporated fuel mass. The left triangle and rectangle injection modes have the better level of atomization and mixing in the early injection due to stronger turbulent kinetic energy, longer penetration, and smaller Sauter mean diameter, while the right triangle has opposite results, which impairs the mixture formation, and its higher injection pressure in the late injection duration causes more impinged fuel mass. Moreover, the temperature, pressure, peak heat release rate, and indicated thermal efficiency for the left triangle are greater than the other two injection modes. Therefore, for the free-piston engine generator, faster injection rate in the early injection stage enables to improve the fuel evaporation, atomization, and mixing processes, meanwhile enhances the level of isochoric heat release around top dead center, resulting in higher indicated thermal efficiency.
ISSN:1687-8140
IDS Number:GG3QG
Unique ID: WOS:000432606900001
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Title:Use of nutrient medium technique for vegetation restoration in Karst region of Southwest China
Authors:Wu, F; Liu, CW; Chen, HK; Diao, ZF; Zhao, S; Xie, H
Author Full Names:Wu, Fan; Liu, Changwu; Chen, Hongkai; Diao, Zhaofeng; Zhao, Shuang; Xie, Hui
Source:JOURNAL OF INTEGRATIVE ENVIRONMENTAL SCIENCES, 15(1):139-159; 10.1080/1943815X.2018.1471725MAY 16 2018
Language:English
Abstract: Karst rocky desertification (KRD) is a global environmental degradation problem caused by human activities and vegetation deterioration. Vegetation restoration in KRD is very difficult due to severe water loss, soil erosion and extensive bare bedrock. For achieving vegetation restoration on bare bedrock areas of KRD, the nutrient medium technique was developed, which is based on the special hydro-geological conditions that is seasonal rainfall is abundant in Karst region of Southwest China and limestone fissures are extremely developed and rich in fissure water. The objective of this research is to investigate the feasibility of using nutrient medium technique to achieve vegetation restoration in KRD region. Through the indoor and field experiments, some properties of the nutrient medium mixture were tested, including water retention, water absorption and nutrient retention. The results showed that the moisture content on the 75th day and water absorption rate of No.2 mixture was 19.9% and 1.67mm/d, respectively, which could be used as optimum mix ratio for producing nutrient medium. The field results showed that the nutrient medium technique could effectively guarantee the survival of sapling at early age and sustainable growth at later age in the field, and the nutrient medium had less nutrient loss. This novel approach can retain and absorb moisture, and saplings do not need artificially supply water and fertiliser in the dry season, and the use of nutrient medium technique to achieve vegetation restoration in KRD region seems to be a feasible option.
ISSN:1943-815X
eISSN:1943-8168
IDS Number:GG2VX
Unique ID: WOS:000432552100001
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Title:ON IMPROVING THE LOCAL CUBIC LAW FOR FRACTURE FLOW MODELING BY KEEPING IMPACTS OF FLUID INERTIA AND IRREGULAR BOUNDARIES
Authors:Yu, C
Author Full Names:Yu, Cheng
Source:JOURNAL OF POROUS MEDIA, 21(1):51-64; 10.1615/JPorMedia.v21.i1.302018
Language:English
Abstract: Local cubic law (LCL) has been widely used for fracture flow modeling; however, its reliability is still subject to debate. In this paper the basic assumptions of LCL were revisited to take into account the impacts of variable boundaries and inertial forces. The vertical distributions and magnitudes of the flow velocities through variable apertures were improved by solving a semiempirically simplified nonlinear Navier-Stokes (N-S) equation. Nonlinear relationships were established between pressure gradients and local flow rates based on these solutions of velocities, and these relationships were regarded as conductivities for the revised LCL models. The following improvements are achieved: (1) the impacts of variable geometries and inertial forces were retained to accommodate the nonlinearity of N-S flow; (2) variations of both the vertical and horizontal velocities were taken into account. The revised LCL models were validated by analytical solutions of transmissivities through sinusoidally walled channels. Results suggest that these revised LCL models show significant improvement. The revised LCL models can also provide a more accurate prediction of pressure distributions, with a good representation of the nonlinearity of N-S flow as well. Meanwhile, the revised LCL model still keeps the advantage of the original LCL method for the convenience in boundary condition treatment.
ISSN:1091-028X
eISSN:1934-0508
IDS Number:GF8BH
Unique ID: WOS:000432192300003
二、EI 10条
1. Preparation and properties of polyethylene glycol/unsaturated polyester resin/graphene nanoplates composites as form-stable phase change materials
Accession number: 20182105236617
Authors: He, Lihong (1, 2); Wang, Hao (1); Yang, Fan (1); Zhu, Hongzhou (2)
Author affiliation: (1) School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) The National Joint Engineering Laboratories of Traffic Civil Materials, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: He, Lihong(sunnyhlh@126.com)
Source title: Thermochimica Acta
Abbreviated source title: Thermochim Acta
Volume: 665
Issue date: 10 July 2018
Publication year: 2018
Pages: 43-52
Language: English
ISSN: 00406031
CODEN: THACAS
Document type: Journal article (JA)
Publisher: Elsevier B.V.
Abstract: In this study, a series of poly(ethylene glycol) (PEG)/unsaturated polyester resin (UPR)/graphene nanoplates (GNPs) form-stable PCMs (FS-PCMs) were prepared via a simple melt blending method. In this composite, PEG was used as the phase change material for thermal storage, UPR was introduced as a supporting material to prevent the leakage of melted PEG during the phase change transition and the GNPs were selected as conductive fillers to enhance the thermal conductivity of the polymer-based FS-PCMs. The test results demonstrate that the FS-PCMs exhibit an outstanding form-stable performance because of the cross-linked spatial network of UPR. According to the FT-IR and XRD results, no new chemical bonds form among PEG, UPR and the GNPs. The results obtained from TGA and DSC show that the composites possess an excellent thermal stability and a high energy storage density. Moreover, it is also found that the incorporation of GNPs remarkably enhances the thermal conductivity of the prepared FS-PCMs. ? 2018 Elsevier B.V.
Number of references: 54
Main heading: Phase change materials
Controlled terms: Blending - Bond strength (chemical) - Crosslinking - Ethylene glycol - Heat storage - Nanostructures - Polyester resins - Polyethylene glycols - Polyols - Thermal conductivity - Unsaturated polymers
Uncontrolled terms: Conductive fillers - Form stable phase change material - High energy storage densities - Melt-blending methods - Nanoplates - Stable performance - Supporting material - Unsaturated polyester resin
Classification code: 641.1 Thermodynamics
Thermodynamics
- 761 Nanotechnology
Nanotechnology
- 801.4 Physical Chemistry
Physical Chemistry
- 802.2 Chemical Reactions
Chemical Reactions
- 802.3 Chemical Operations
Chemical Operations
- 804.1 Organic Compounds
Organic Compounds
- 815.1.1 Organic Polymers
Organic Polymers
- 933 Solid State Physics
Solid State Physics
DOI: 10.1016/j.tca.2018.04.012
Funding Details: Number; Acronym; Sponsor: 51508063; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
2. Global μ-synchronization of impulsive complex-valued neural networks with leakage delay and mixed time-varying delays
Accession number: 20182105220268
Authors: Hu, Binxin (1); Song, Qiankun (1); Li, Kelin (2); Zhao, Zhenjiang (3); Liu, Yurong (4, 5); Alsaadi, Fuad E. (5)
Author affiliation: (1) Department of Mathematics, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Department of Mathematics, Sichuan University of Science and Engineering, Sichuan; 643000, China; (3) Department of Mathematics, Huzhou University, Huzhou; 313000, China; (4) Department of Mathematics, Yangzhou University, Yangzhou; 225002, China; (5) Communication Systems and Networks (CSN) Research Group, Faculty of Engineering, King Abdulaziz University, Jeddah; 21589, Saudi Arabia
Corresponding author: Song, Qiankun(qiankunsong@163.com)
Source title: Neurocomputing
Abbreviated source title: Neurocomputing
Issue date: 2018
Publication year: 2018
Language: English
ISSN: 09252312
E-ISSN: 18728286
CODEN: NRCGEO
Document type: Article in Press
Publisher: Elsevier B.V.
Abstract: In this paper, the problem on synchronization is investigated for a class of impulsive complex-valued neural networks with discrete and distributed time-varying delays as well as leakage delay. By constructing appropriate Lyapunov–Krasovskii functional, and using Newton–Leibniz formulation, inequality technique and free-weighting matrix method, several sufficient criteria to guarantee the global μ-synchronization are derived for the considered impulsive complex-valued neural networks. The provided conditions are expressed in terms of linear matrix inequalities, and are dependent on the sizes of discrete delays, distributed delays and leakage delay. An example with simulations is provided to verify the effectiveness of the obtained results. ? 2018 Elsevier B.V.
Main heading: Time varying networks
Controlled terms: Complex networks - Linear matrix inequalities - Synchronization - Time delay - Time varying control systems
Uncontrolled terms: Complex-valued neural networks - Discrete time-varying delays - Distributed time-varying delays - Impulsive effects - Leakage delays
Classification code: 703.1 Electric Networks
Electric Networks
- 713 Electronic Circuits
Electronic Circuits
- 722 Computer Systems and Equipment
Computer Systems and Equipment
- 731.1 Control Systems
Control Systems
- 921.1 Algebra
Algebra
- 961 Systems Science
Systems Science
DOI: 10.1016/j.neucom.2018.04.040
Funding Details: Acronym; Sponsor: NSFC; National Natural Science Foundation of China
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
3. Rate and distribution of sedimentation in the Three Gorges Reservoir, Upper Yangtze River
Accession number: 20182105234477
Authors: Li, Wenjie (1); Yang, Shengfa (1); Xiao, Yi (2); Fu, Xuhui (2); Hu, Jiang (2); Wang, Tao (3)
Author affiliation: (1) National Inland Waterway Regulation Engineering Research Center, Chongqing Jiaotong Univ., Chongqing; 400074, China; (2) Key Laboratory of Ministry of Education for Hydraulic and Water Transport Engineering, Chongqing Jiaotong Univ., Chongqing; 400074, China; (3) Changjiang Chongqing Harbour and Waterway Engineering Investigation and Design Institute, Chongqing; 401147, China
Corresponding author: Li, Wenjie(li_wj1984@163.com)
Source title: Journal of Hydraulic Engineering
Abbreviated source title: J. Hydraul. Eng.
Volume: 144
Issue: 8
Issue date: August 1, 2018
Publication year: 2018
Article number: 05018006
Language: English
ISSN: 07339429
E-ISSN: 19437900
Document type: Journal article (JA)
Publisher: American Society of Civil Engineers (ASCE)
Abstract: Sedimentation in the Three Gorges Reservoir (TGR) has been studied with a primary focus on the amount due to the decrease in sediment inflow caused by water and soil conservation projects and sediment retention of recently constructed upstream cascade reservoirs. In this study, the rate and distribution of sedimentation in the TGR were investigated. A total of 1.6 billion tons of sediment was trapped in the TGR from 2003 to 2015. The sediment retention rate increased from 60% during the initial operation stage between 2003 and 2005 to 82% during the normal operation stage between 2006 and 2015. Sediment finer than 0.008 and 0.016 mm contributed 44 and 61% of the total sedimentation, respectively, and the median size of the sedimentation was 0.01 mm. The spatial distribution of the sedimentation was discontinuous, and 80% of the sedimentation occurred in one-third of the backwater region, with primary deposition zones being at the wide reservoir reaches. The sedimentation was assessed by the sediment transport capacity, which was embedded in the 1-D sediment transport and bed deformation equations. Due to the impoundment of the TGR, the sediment transport capacities decreased significantly at the wide reservoir reaches where flocculation occurred, resulting in deposition. However, the sediment transport capacities were still greater than the sediment concentrations at the gorges, which will be the fixed stretches with no deposition. The surplus sediment transport capacity at the gorge stretches would not allow cumulative sedimentation in the future, leading to a spatially discontinuous equilibrium sedimentation along the TGR instead of the predicted spatially continuous distribution. A uniform bed slope is not expected under the new sedimentation equilibrium state, and the actual sedimentation will be considerably less than the initially predicted value, generating a sustainable storage volume with about 84.7% of the initial volume, which will facilitate the engineering functions of the TGR significantly. ? 2018 American Society of Civil Engineers.
Number of references: 36
Main heading: Sedimentation
Controlled terms: Reservoirs (water) - Rivers - Sediment transport - Soil conservation - Spatial distribution
Uncontrolled terms: Continuous distribution - Discontinuous equilibrium - Fine sediments - Sediment retention - Sediment transport capacity - Sedimentation equilibrium - Three gorges reservoir - Water and soil conservations
Classification code: 441.2 Reservoirs
Reservoirs
- 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
- 802.3 Chemical Operations
Chemical Operations
- 921 Mathematics
Mathematics
Numerical data indexing: Percentage 2.00e+03% to 8.20e+01%, Percentage 4.40e+01%, Percentage 6.00e+01%, Percentage 6.10e+01%, Percentage 8.00e+01%, Percentage 8.47e+01%, Size 1.00e-05m, Size 1.60e-05m, Size 8.00e-06m
DOI: 10.1061/(ASCE)HY.1943-7900.0001486
Funding Details: Number; Acronym; Sponsor: 51679019; 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. Experimental study on aerodynamic characteristics of high-speed train on a truss bridge: A moving model test
Accession number: 20182105235330
Authors: Li, Xiao-Zhen (1); Wang, Ming (1); Xiao, Jun (1, 2); Zou, Qi-Yang (1); Liu, De-Jun (1, 3)
Author affiliation: (1) Department of Bridge Engineering, Southwest Jiaotong University, Chengdu; Sichuan; 610031, China; (2) School of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (3) College of Civil Engineering & Architecture, Jiaxing University, Jiaxing; Zhejiang; 314001, China
Corresponding author: Wang, Ming(Charming_1989@my.swjtu.edu.cn)
Source title: Journal of Wind Engineering and Industrial Aerodynamics
Abbreviated source title: J. Wind Eng. Ind. Aerodyn.
Volume: 179
Issue date: August 2018
Publication year: 2018
Pages: 26-38
Language: English
ISSN: 01676105
Document type: Journal article (JA)
Publisher: Elsevier B.V.
Abstract: To address the common issues and deficiencies associated with state-of-art static and moving train wind tunnel test, this paper devised a novel test system for the aerodynamic test of vehicles travelling across the bridges. A servo motor synchronous driving system was used along with a wireless module for the transducer in measuring aerodynamic forces on the high-speed train. The maximum speed of the train model can reach 15 m/s with an effective acquisition time of 0.7s. Besides, due to the independent arrangement between the bridge model and the test motion driving system, replacement of the bridge model can be achieved, enhancing the adaptability of the system. Based on the developed test system, a scaled model (including a steel-truss bridge and the CRH3 train system) was tested and aerodynamic characteristics of the moving train were measured and analyzed under various wind velocities, speeds of the train, and wind angles. It reveals that aerodynamic coefficients of the train measured with a static train model are different from those measured with the dynamic train model. The existence of truss bridge causes that the aerodynamic coefficients of model train vary significantly as the incoming wind velocity, speed of the train, and wind angle change. ? 2018 Elsevier Ltd
Number of references: 31
Main heading: Railroad tunnels
Controlled terms: Aerodynamics - Railroad cars - Railroad transportation - Railroads - Speed - Steel bridges - Testing - Trusses - Wind stress - Wind tunnels
Uncontrolled terms: Aerodynamic forces - Crosswind - Moving train - Truss bridge - Wind tunnel tests
Classification code: 401.1 Bridges
Bridges
- 401.2 Tunnels and Tunneling
Tunnels and Tunneling
- 408.2 Structural Members and Shapes
Structural Members and Shapes
- 433.1 Railroad Transportation, General
Railroad Transportation, General
- 443.1 Atmospheric Properties
Atmospheric Properties
- 651.1 Aerodynamics, General
Aerodynamics, General
- 651.2 Wind Tunnels
Wind Tunnels
- 682.1.1 Railroad Cars
Railroad Cars
Numerical data indexing: Time 7.00e-01s, Velocity 1.50e+01m/s
DOI: 10.1016/j.jweia.2018.05.012
Funding Details: Number; Acronym; Sponsor: 51708465; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: U1434205; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
5. State estimation of complex-valued neural networks with two additive time-varying delays
Accession number: 20182105219582
Authors: Liang, Jing (1); Li, Kelin (2); Song, Qiankun (1); Zhao, Zhenjiang (3); Liu, Yurong (4, 5); Alsaadi, Fuad E. (5)
Author affiliation: (1) Department of Mathematics, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Department of Mathematics, Sichuan University of Science and Engineering, Sichuan; 643000, China; (3) Department of Mathematics, Huzhou University, Huzhou; 313000, China; (4) Department of Mathematics, Yangzhou University, Yangzhou; 225002, China; (5) Communication Systems and Networks (CSN) Research Group, Faculty of Engineering, King Abdulaziz University, Jeddah; 21589, Saudi Arabia
Corresponding author: Song, Qiankun(qiankunsong@163.com)
Source title: Neurocomputing
Abbreviated source title: Neurocomputing
Issue date: 2018
Publication year: 2018
Language: English
ISSN: 09252312
E-ISSN: 18728286
CODEN: NRCGEO
Document type: Article in Press
Publisher: Elsevier B.V.
Abstract: This paper aims at the problem on state estimation of complex-valued neural networks with two additive time-varying delays. Via selecting appropriate Lyapunov–Krasovskii functionals and utilizing reciprocally convex approach and applying matrix inequality technique to analysis, a delay-dependent sufficient condition is derived in the form of linear matrix inequalities (LMIs) to estimate the neuron state with some observed output measurements so as to guarantee the global asymptotic stability of the error-state system. A numerical example is provided to illustrate the feasibility of the obtained result. ? 2018 Elsevier B.V.
Main heading: Time varying networks
Controlled terms: Asymptotic stability - Complex networks - Linear matrix inequalities - Robustness (control systems) - State estimation - Time delay - Time varying control systems
Uncontrolled terms: Complex-valued neural networks - Convex approach - Delay dependent - Error-state - Global asymptotic stability - Linear Matrix Inequalities (LMIs) - Matrix inequality - Time varying- delays
Classification code: 703.1 Electric Networks
Electric Networks
- 713 Electronic Circuits
Electronic Circuits
- 722 Computer Systems and Equipment
Computer Systems and Equipment
- 731.1 Control Systems
Control Systems
- 921.1 Algebra
Algebra
DOI: 10.1016/j.neucom.2018.05.003
Funding Details: Number; Acronym; Sponsor: 61473332; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61573010; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61773004; NSFC; National Natural Science Foundation of China
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
6. Effects and Laws of Spatial Rotations of Principal Stress Axes in Embankment Due to Moving Loads on High-speed Railway
Accession number: 20182105222808
Authors: Xue, Fuchun (1); Zhang, Jianmin (2)
Author affiliation: (1) School of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) School of Civil Engineering, Tsinghua University, Beijing; 100084, China
Source title: Tiedao Xuebao/Journal of the China Railway Society
Abbreviated source title: Tiedao Xuebao
Volume: 40
Issue: 2
Issue date: February 15, 2018
Publication year: 2018
Pages: 100-109
Language: Chinese
ISSN: 10018360
CODEN: TIXUF5
Document type: Journal article (JA)
Publisher: Science Press
Abstract: The elaborated nonlinearly coupled dynamic simulation model for track-embankment-foundation on straight high-speed railway was established to investigate the rotation laws of principal stresses axes in embankment. The dynamic interaction of the concrete base-upper layer of formation was simulated using contact pairs. The static stress state of the train before its operation was simulated by the combined use of nonlinear material constitutive model and the three-dimensional viscoelastic static-dynamic unified artificial boundaries. The effects and laws for the rotations of principal stress axes in embankment induced by moving loads were investigated based on high performance computation(HPC).The rotations in embankment were compared with the results of the direct action of the moving load on the surface of a semi-infinite foundation. The results show that the principal stress axes for the elements located just below loaded and unloaded rails at the same depth rotate synchronously and continuously in the xy, xz, and yz planes, but remarkable differences are found in rotation modes and intensity between them. The rotations in embankment are much more complicated than the situation of direct action of moving loads on the surface of a semi-infinite foundation. The intensity of rotations of principal stress axes for the elements located below the loaded rails attenuate with the increase of the depth. Surface waves have significant influences on the rotations of principal stress axes of the elements located at the top of the analysis models. ? 2018, Department of Journal of the China Railway Society. All right reserved.
Number of references: 13
Main heading: Rotation
Controlled terms: Embankments - Railroad plant and structures - Railroad transportation - Railroads - Rails - Resonance - Surface waves
Uncontrolled terms: Artificial boundaries - Embankment foundation - High - speed railways - High performance computation - Moving load - Nonlinearly coupled - Principal stress - Semi-infinite foundation
Classification code: 405 Construction Equipment and Methods; Surveying
Construction Equipment and Methods; Surveying
- 433.1 Railroad Transportation, General
Railroad Transportation, General
- 483 Soil Mechanics and Foundations
Soil Mechanics and Foundations
- 681.1 Railway Plant and Structures, General
Railway Plant and Structures, General
- 931.1 Mechanics
Mechanics
DOI: 10.3969/j.issn.1001-8360.2018.02.014
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
7. Global Mittag-Leffler stability and synchronization analysis of fractional-order quaternion-valued neural networks with linear threshold neurons
Accession number: 20182105226208
Authors: Yang, Xujun (1); Li, Chuandong (1); Song, Qiankun (2); Chen, Jiyang (1); Huang, Junjian (3)
Author affiliation: (1) Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing, College of Electronic and Information Engineering, Southwest University, Chongqing; 400715, China; (2) College of Mathematics and Statistics, Chongqing Jiaotong University, Chongqing; 400074, China; (3) Department of Computer Science, Chongqing University of Education, Chongqing; 400067, China
Corresponding author: Li, Chuandong(cdli@swu.edu.cn)
Source title: Neural Networks
Abbreviated source title: Neural Netw.
Volume: 105
Issue date: September 2018
Publication year: 2018
Pages: 88-103
Language: English
ISSN: 08936080
E-ISSN: 18792782
CODEN: NNETEB
Document type: Journal article (JA)
Publisher: Elsevier Ltd
Abstract: This paper talks about the stability and synchronization problems of fractional-order quaternion-valued neural networks (FQVNNs) with linear threshold neurons. On account of the non-commutativity of quaternion multiplication resulting from Hamilton rules, the FQVNN models are separated into four real-valued neural network (RVNN) models. Consequently, the dynamic analysis of FQVNNs can be realized by investigating the real-valued ones. Based on the method of M-matrix, the existence and uniqueness of the equilibrium point of the FQVNNs are obtained without detailed proof. Afterwards, several sufficient criteria ensuring the global Mittag-Leffler stability for the unique equilibrium point of the FQVNNs are derived by applying the Lyapunov direct method, the theory of fractional differential equation, the theory of matrix eigenvalue, and some inequality techniques. In the meanwhile, global Mittag-Leffler synchronization for the drive–response models of the addressed FQVNNs are investigated explicitly. Finally, simulation examples are designed to verify the feasibility and availability of the theoretical results. ? 2018 Elsevier Ltd
Number of references: 52
Main heading: Neural networks
Controlled terms: Differential equations - Eigenvalues and eigenfunctions - Linear networks - Matrix algebra - Stability criteria - Synchronization
Uncontrolled terms: Existence and uniqueness - Fractional differential equations - Fractional order - Inequality techniques - Linear threshold neurons - Lyapunov direct method - Mittag-Leffler - Synchronization problem
Classification code: 703.1 Electric Networks
Electric Networks
- 921.1 Algebra
Algebra
- 921.2 Calculus
Calculus
- 961 Systems Science
Systems Science
DOI: 10.1016/j.neunet.2018.04.015
Funding Details: Number; Acronym; Sponsor: 11501065; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61374078; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61773004; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: NPRP 9-166-1-031; QNRF; Qatar National Research Fund
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
8. Multifunctional Light Sword Metasurface Lens
Accession number: 20182105230440
Authors: Zhang, Zhengren (1, 2); Wen, Dandan (1); Zhang, Chunmei (1); Chen, Ming (3); Wang, Wei (1); Chen, Shuqi (4); Chen, Xianzhong (1)
Author affiliation: (1) SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh; EH14 4AS, United Kingdom; (2) School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (3) Centre for Photonics Research, Guilin University of Electronic Technology, Guilin; 541004, China; (4) Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Teda Applied Physics Institute, Nankai University, Tianjin; 300071, China
Corresponding author: Chen, Xianzhong(x.chen@hw.ac.uk)
Source title: ACS Photonics
Abbreviated source title: ACS Photonics
Volume: 5
Issue: 5
Issue date: May 16, 2018
Publication year: 2018
Pages: 1794-1799
Language: English
E-ISSN: 23304022
Document type: Journal article (JA)
Publisher: American Chemical Society
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. ? 2018 American Chemical Society.
Number of references: 29
Main heading: Diffractive optics
Uncontrolled terms: Angular-modulation - Light sword optical elements - long focus of depth - Metasurface - multiple functionalities - Polarization state - Rotational symmetries - System integration
Classification code: 741.1 Light/Optics
Light/Optics
DOI: 10.1021/acsphotonics.7b01536
Funding Details: Number; Acronym; Sponsor: 11504034; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 201608500036; CSC; China Scholarship Council
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
9. Study on Traffic Congestion Pre-Control of Link between Non-Signalized Intersections
Accession number: 20182105232847
Authors: Zhi, Han (1, 2); Zhenke, Wang (2); Hailiang, Yue (2)
Author affiliation: (1) College of Traffic and Transportation, Chongqing Jiaotong University, Chongqing; 400074, China; (2) China Merchants Chongqing Communications Technology Research and Design Institute Co., Ltd., Chongqing; 400067, China
Corresponding author: Zhenke, Wang(947759963@qq.com)
Source title: Proceedings - 10th International Conference on Intelligent Computation Technology and Automation, ICICTA 2017
Abbreviated source title: Proc. - Int. Conf. Intell. Comput. Technol. Autom., ICICTA
Volume: 2017-October
Part number: 1 of 1
Issue title: Proceedings - 10th International Conference on Intelligent Computation Technology and Automation, ICICTA 2017
Issue date: October 30, 2017
Publication year: 2017
Pages: 378-381
Language: English
ISBN-13: 9781538612309
Document type: Conference article (CA)
Conference name: 10th International Conference on Intelligent Computation Technology and Automation, ICICTA 2017
Conference date: October 9, 2017 - October 10, 2017
Conference location: Changsha, Hunan, China
Conference code: 133884
Sponsor: Communications Research Institute of Changsha University of Science and Technology; Department of Urban Management, Hunan City College; Shenzhen Research Institute of Central South University
Publisher: Institute of Electrical and Electronics Engineers Inc.
Abstract: Capacity is defined as the maximum traffic flow passing through a section of a road per hour, which is not related to the length of the link or the traffic characteristics of the upstream and downstream intersections. The traffic condition cannot be accurately expressed when the road is congested. The concept of Link Capacity was proposed in the paper, and the Link Capacity calculation model was established according to Traffic Wave Theory. All influences on Link Capacity were analyzed and ranked in impact. Traffic can be pre-controlled in order of the volume of downstream intersection, the speed of passing through the link, the length of the link, the time of passing through the downstream intersection, the speed of passing through the downstream intersection, and the optimal pre-control method of the link congestion without building more roads is proposed. ? 2017 IEEE.
Number of references: 5
Main heading: Traffic congestion
Controlled terms: Computation theory - Roads and streets - Street traffic control - Traffic signals
Uncontrolled terms: Control methods - Link capacities - Non-signalized intersection - Traffic characteristics - Traffic conditions - Traffic flow - Traffic wave theories
Classification code: 406.2 Roads and Streets
Roads and Streets
- 432.4 Highway Traffic Control
Highway Traffic Control
- 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI: 10.1109/ICICTA.2017.90
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
10. Structural, elastic, electronic, phonon, dielectric and optical properties of Bi3TeBO9from first-principles calculations
Accession number: 20182105236111
Authors: Zhong, Mi (1, 2); Liu, Qi-Jun (1, 2); Jiang, Cheng-Lu (1, 2); Liu, Fu-Sheng (1, 2); Tang, Bin (3); Peng, Xiao-Juan (4)
Author affiliation: (1) School of Physical Science and Technology, Southwest Jiaotong University, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Chengdu; 610031, China; (2) Bond and Band Engineering Group, Sichuan Provincial Key Laboratory (for Universities) of High Pressure Science and Technology, Southwest Jiaotong University, Chengdu; 610031, China; (3) State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an; 710072, China; (4) College of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: Liu, Qi-Jun(qijunliu@home.swjtu.edu.cn)
Source title: Journal of Physics and Chemistry of Solids
Abbreviated source title: J Phys Chem Solids
Volume: 121
Issue date: October 2018
Publication year: 2018
Pages: 139-144
Language: English
ISSN: 00223697
CODEN: JPCSAW
Document type: Journal article (JA)
Publisher: Elsevier Ltd
Abstract: The energy band structure, electronic density of states, elastic constants, phonon spectrum, dielectric and optical properties of Bi3TeBO9(BTBO) were studied by means of the first-principles calculations. The obtained structural parameters from PBEsol functional method are in good agreement with the experiment values. From the elastic constants, the bulk modulus (B), shear modulus (G), Young’s modulus (E), Poisson’s ratio (ν and νij), ratio of B/G and C12-C44have been obtained. The BTBO is found to be ductile. The energy band structure and DOS indicate that the nonlinear optical (NLO) properties are dominated by the electron jumping from the top of the valence bands to the bottom of the conduction bands. The phonon and dielectric properties of BTBO were calculated, indicating that the BTBO is dynamically stable and has relatively high dielectric constant. Moreover, the optical properties such as dielectric function Ε(ω), refractive index n(ω), extinction coefficientk(ω), absorption coefficient α(ω), optical reflectivityR(ω) and energy-loss function L(ω) were calculated and analyzed. ? 2018 Elsevier Ltd
Number of references: 53
Main heading: Structural properties
Controlled terms: Band structure - Bismuth compounds - Calculations - Dielectric properties - Elastic constants - Elastic moduli - Electronic density of states - Electronic structure - Energy dissipation - Optical properties - Phonons - Refractive index - Tellurium compounds
Uncontrolled terms: Absorption co-efficient - Bi3TeBO9 - Dielectric and optical properties - Dielectric functions - Energy loss function - First-principles calculation - High dielectric constants - Nonlinear optical properties
Classification code: 525.4 Energy Losses (industrial and residential)
Energy Losses (industrial and residential)
- 741.1 Light/Optics
Light/Optics
- 921 Mathematics
Mathematics
- 931.2 Physical Properties of Gases, Liquids and Solids
Physical Properties of Gases, Liquids and Solids
- 933 Solid State Physics
Solid State Physics
- 951 Materials Science
Materials Science
DOI: 10.1016/j.jpcs.2018.05.026
Funding Details: Number; Acronym; Sponsor: 51402244; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
