SCI 8条
Record 1 of 8
Invariant Borel probability measures for discrete long-wave-short-wave resonance equations
Authors: Wang, CZ; Xue, G; Zhao, CD
APPLIED MATHEMATICS AND COMPUTATION
Volume: 339 Pages: 853-865 Published: DEC 15 2018 Language: English Document type: Article
DOI: 10.1016/j.amc.2018.06.059
Abstract:
In this article we study the Borel probability measures that can be associated to the time averaged observation of the process generated by the non-autonomous long-wave-short-wave resonance equations on infinite lattices, via the notion of generalized Banach limit. We establish that the generated process possesses a pullback-D attractor, and further prove that there exists a unique family of invariant Borel probability measures carried by the Invariant measures pullback attractor. (C) 2018 Elsevier Inc. All rights reserved.
Record 2 of 8
Numerical simulation of heat transfer of the crushed-rock interlayer embankment of Qinghai-Tibet Railway affected by aeolian sand clogging and climate change
Authors: Chen, L; Yu, WB; Yi, X; Hu, D; Liu, WB
COLD REGIONS SCIENCE AND TECHNOLOGY
Volume: 155 Pages: 1-10 Published: NOV 2018 Language: English Document type: Article
DOI: 10.1016/j.coldregions.2018.07.009
Abstract:
The crushed-rock interlayer (CRI) has been used to cool the railway embankment subbase and subgrade of the Qinghai-Tibet Railway (QTR) in permafrost regions. However, in addition to the climate change, aeolian sand clogging has been affecting this mitigation techniques aimed to increase heat extraction and reduce subsurface heat penetration by air convection through the voids of the CAI. Its long-term performance is evaluated herein using a numerical modelling. Simulation results demonstrate an unclogged CRI can mitigate permafrost warming for the first 20 years with a simulated increase in average air temperature by 0.052 degrees C a(-1). But after sand clogging, including both filling of voids in the CRI and covering of embankment slopes, its cooling performance is weakened. In such conditions, permafrost table is increasing and the permafrost is warming up under different mean annual air temperature (MAAT) of -4.5, -5.5, and -6.5 degrees C. The water content of the aeolian sand can also affect the cooling effectiveness of CAI. A 1 m-thick dry sand cover can induce an increase in ground temperature. But wet sand layer can mitigate and delay the effect of climate change on the permafrost degradation. The sand-control measures and additional engineering techniques should be adopted to prevent the long-term thermal stability of the QTR in sandy permafrost zone of Qinghai-Tibet Plateau.
Record 3 of 8
Uncertainty relations for signal concentrations associated with the linear canonical transform
Authors: Xu, SQ; Feng, L; Chai, Y; Du, B; He, YG
DIGITAL SIGNAL PROCESSING
Volume: 81 Pages: 100-105 Published: OCT 2018 Language: English Document type: Article
DOI: 10.1016/j.dsp.2018.06.008
Abstract:
The linear canonical transform (LCT) has been shown to be a useful and powerful tool in optics and signal processing. In this paper, a new uncertainty relation in the LCT domain has been obtained at first. It shows that nonzero signal's energy in two arbitrary LCT domains cannot be arbitrarily large simultaneously, which is the generalization of the uncertainty principle for signal concentrations in the Fourier domain. Meanwhile, the signals which are the best in achieving simultaneous concentration in two arbitrary LCT domains are also proposed. In addition, some potential applications are presented to show the effectiveness of the theorems. (C) 2018 Elsevier Inc. All rights reserved.
Record 4 of 8
FEASIBILITY STUDY ON THE SUBMERGED FLOATING TUNNEL IN QIONGZHOU STRAIT, CHINA
Authors: Jiang, BL; Liang, B; Wu, SS
POLISH MARITIME RESEARCH
Volume: 25 Pages: 4-11 Published: AUG 2018 Language: English Document type: Article
DOI: 10.2478/pomr-2018-0066
Abstract:
Currently, one of the challenging tasks for Chinese engineering community is to construct a water-way crossing of Qiongzhou Strait in the south of China. This project has also gained significant attention from researchers in academia. The study presented herein is centered on providing a feasible solution for ac-complishing the above mentioned task. Initially, different alternatives as the best location, judged on the basis of the environmental constraints, are studied. Then the comparison between various structural solutions such as suspension bridge, submarine tunnel and SFT is presented. Among these solutions, SFT appears to be a very suitable alternative for Qiongzhou Strait waterway crossing due to distinctive advantages, like shorter distance, lower cost, less impact on environment and navigation, etc. Based on the appropriate conception for cross sections, support systems, materials, joints and connection schemes, a numerical model is developed by means of the FEM software ANSYS/Fluent. It is then analyzed under the influence of different environmental loading conditions, varying the wave heights and lengths, current velocities and water depths, which are typical in Qiongzhou Strait. The numerical results reveal that the proposed SFT solution performs safely even under extreme weather conditions.
Record 5 of 8
Experimental study on aerodynamic characteristics of high-speed train on a truss bridge: A moving model test
Authors: Li, XZ; Wang, M; Xiao, J; Zou, QY; Liu, DJ
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
Volume: 179 Pages: 26-38 Published: AUG 2018 Language: English Document type: Article
DOI: 10.1016/j.jweia.2018.05.012
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.
Record 6 of 8
Migration and transformation of nitrogen in algae organic matter (AOM) during the growth of Microcystis aeruginous
Authors: Li, G; Ren, Y; Gu, L; He, Q; Deng, R; Tang, LZ
DESALINATION AND WATER TREATMENT
Volume: 111 Pages: 79-87 Published: APR 2018 Language: English Document type: Article
DOI: 10.5004/dwt.2018.22029
Abstract:
Microcystis aeruginous were cultured to study on the algae organic matter (AOM) migration, transformation and potential to produce nitrogenous disinfection by-products (N-DBPs) during algae growth, dissolved organic nitrogen (DON) concentration shows an upward tendency. The migration of nitrogen in different inorganic ions were studied. Large molecular weight substances in EOM gradually transform into small molecules with the growth of algae, while the molecular weight distribution of IOM stay stable. EOM is mainly composed of humic acid-like materials and soluble microbial products, while IOM is mainly composed of aromatic proteins and soluble microbial products. The strongly hydrophobic organic matter (HPO) possesses the highest proportion. In IOM, but the hydrophilic fraction of IOM presents the highest N-DBPs formation potential. The hydrophilic organic matter (HPI) is the major content of EOM, but the HPO presents the highest N-DBPs formation potential.
Record 7 of 8
Generation and Meshing Analysis of a New Type of Double Helical Gear Transmission
Authors: Liang, D; Luo, TH; Tan, RL
MATHEMATICAL PROBLEMS IN ENGINEERING
Published: 2018 Language: English Document type: Article
DOI: 10.1155/2018/1539849
Abstract:
A study on the double helical gear transmission with curve element constructed tooth pairs is carried out in this paper. Generation and mathematical model of tooth profiles are proposed based on the geometric relationship. Tooth profiles equations are derived considering the developed equidistance-enveloping approach. Design of tooth profiles with point contact is conducted and numerical example is illustrated. And the solid models of double helical gear pair with curve element constructed tooth pairs are established. Computerized design and meshing simulation are also put forward. Furthermore, stress analysis of the gear pair is conducted and gear prototypes are manufactured using CNC machining technology. Further tooth contact analysis, dynamic and experimental studies on transmission properties of gear prototypes will be carried out.
Record 8 of 8
Reconstruction theorem for bandlimited signals from noisy samples in the offset linear canonical transform domain
Authors: Xu, SQ; Feng, L; Chai, Y; He, YG; Chen, ZW
OPTIK
Volume: 171 Pages: 862-868 Published: 2018 Language: English Document type: Article
DOI: 10.1016/j.ijleo.2018.06.104
Abstract:
As the offset linear canonical transform has became a novel and effective method in signal processing and optics, the sampling and reconstructing theorems for bandlimited signals associated with the OLCT have been widely researched in the literature. However, all these theorems are derived under the condition of noiseless. In this work, the reconstruction theorem of bandlimited signals by using its noisy samples associated with the OLCT has been well studied. We first show that the well-known reconstruction theorem for the OLCT bandlimited signals is invalid in the presence of random errors. Then, the oversampling theorem of the OLCT bandlimited signals is obtained based on the orthogonal complete set of the OLCT bandlimited signals. Subsequently, the reconstruction theorem for the OLCT bandlimited signals from samples in the presence of noise is derived by utilizing the oversampling theorem. Lastly, the simulations are provided to indicate the advantages and correctness of the derived results.
EI 9条
1. Hemispherical flower-like N-doped porous carbon/NiCo2O4 hybrid electrode for supercapacitors
Tang, Qi (School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing; 400074, China); Zhou, You; Ma, Li; Gan, Mengyu Source: Journal of Solid State Chemistry, v 269, p 175-183, January 2019
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
2. Driver’s Visual Load at Tunnel Entrance and Exit of Sections with High Ratio of Tunnels (高隧道比路段隧道出入口驾驶员视觉负荷研究)
Duan, Meng-Meng (School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing; 400074, China); Tang, Bo-Ming; Hu, Xu-Hui; He, Bai-Ke; Liu, Tang-Zhi Source: Jiaotong Yunshu Xitong Gongcheng Yu Xinxi/Journal of Transportation Systems Engineering and Information Technology, v 18, n 3, p 113-119, June 1, 2018 Language: Chinese
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
3. Feasibility study on the submerged floating tunnel in Qiongzhou Strait, China
Jiang, Bolin (Chongqing Vocational Institute of Engineering, Chongqing; 402260, China); Liang, Bo; Wu, Shanshan Source: Polish Maritime Research, v 25, p 4-11, August 1, 2018
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
4. Profit Allocation Optimization Based on Multi-center Vehicle Routing Problem (基于多中心车辆路径问题的收益分配优化研究)
Wang, Yong (School of Economics and Management, Chongqing Jiaotong University, Chongqing; 400074, China); Ren, Yin-Ji; Liu, Yong; Xu, Mao-Zeng Source: Jiaotong Yunshu Xitong Gongcheng Yu Xinxi/Journal of Transportation Systems Engineering and Information Technology, v 18, n 3, p 210-217, June 1, 2018 Language: Chinese
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
5. An experimental study on the effect of turbulent shear on flocculation of cohesive sediment in Three Gorges Reservoir (三峡库区黏性泥沙在紊动剪切作用下的絮凝试验研究)
Zu, Bo (National Inland Waterway Regulation Engineering Research Center Chongqing Jiaotong University, Chongqing; 400074, China); Wang, Jun; Li, Zhenliang; Li, Wang Source: Shuikexue Jinzhan/Advances in Water Science, v 29, n 2, p 196-203, March 30, 2018 Language: Chinese
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
6. Optimization of wind farm layout with modified genetic algorithm based on boolean code
Yang, Qingshan (School of Civil Engineering, Chongqing University, Chongqing; 400044, China); Hu, Jianxiao; Law, Siu-seong Source: Journal of Wind Engineering and Industrial Aerodynamics, v 181, p 61-68, October 2018
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
7. A study on the vibration equation of the rupture of perilous rock aggregate (危岩聚集体破坏振动方程研究)
Chen, Hongkai (College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang; 443002, China); Wu, Yahua; Wang, Shengjuan Source: Zhendong yu Chongji/Journal of Vibration and Shock, v 37, n 12, p 60-66, June 28, 2018 Language: Chinese
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
8. Microstructure and Deformation Mechanism of AZ31 Magnesium Alloy Under Dynamic Strain Rate
Lou, Chao (National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing Jiaotong University, Chongqing; 400074, China); Sun, Qi; Yang, Qingshan; Ren, Yi; Gao, Zhengyuan; Zhang, Xiyan Source: Journal of Materials Engineering and Performance, 2018 Article in Press
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
9. Research Progress on Self-healing of Asphalt Binder (沥青胶结料自愈合研究进展)
Zhu, Jianyong (School of Material Science and Engineering, Chongqing Jiaotong University, Chongqing; 400074, China); He, Zhaoyi Source: Cailiao Daobao/Materials Review, v 32, n 3, p 847-854, March 10, 2018 Language: Chinese
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
