一、SCI 6条
*Record 1 of 6. Search terms matched: CHONGQING UNIV, COMMUN(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title: The Turning Point for Morphomechanical Remodeling During Complete Intestinal Obstruction in Rats Occurs After 12-24 h
Authors: Sun, DM; Zhao, JB; Liao, DH; Huang, ZY; Gregersen, H
Author Full Names: Sun, Daming; Zhao, Jingbo; Liao, Donghua; Huang, Zhiyong; Gregersen, Hans
Source: ANNALS OF BIOMEDICAL ENGINEERING, 46 (5):705-716; 10.1007/s10439-018-1992-z MAY 2018
Language: English
Abstract: Intestinal obstruction prompts luminal dilation and wall remodeling proximal to the site of obstruction. Studies on temporal and spatial morphomechanical remodeling are needed for comprehending the pathophysiology of acute intestinal obstruction. The aim was to estimate the no-load and zero-stress morphomechanical properties in circumferential and longitudinal direction at 0, 6, 12, 24, 36, and 48 h after complete intestinal obstruction. Obstruction of the distal ileum was created surgically by placement of a polyethylene ring for up to 48 h in 30 rats. Sham and normal groups were also studied (n = 12). Five 6 cm-long intestinal segments proximal to the obstruction site were used for histological, morphometric and mechanical analysis at the designated times. Morphomechanical changes were huge but only subtle changes were observed between the 5 segments during the obstruction period. Due to dilation, the serosal length and mucosal length increased continuously from 6 to 48 h (p < 0.001). the wall area increased at 24 h and beyond (p < 0.001), demonstrating tissue growth. the opening and bending angle decreased to minimum values at 24 h where after the opening angle increased and the bending angle returned to pre-obstruction levels. for the residual stretch ratios and the position of the neutral axis the turning point was found after 24 h. histologically, the thickness and area of most wall layers were quite stable for the first 12 h but with an increase at the 24 h time point that continued to the 48 h time point. the most pronounced change was found for the circumferential muscle layer (p < 0.05). analysis of picrosirius red stained slides showed that submucosal type 3 collagen fraction increased significantly (p < 0.001), whereas the fraction of type 1 collagen decreased (p < 0.001). in conclusion, pronounced time-dependent morphomechanical remodeling was found. the obstructed intestine went from dilation remodeling to growth remodeling during the interval 12-24 h after creating the obstruction.
ISSN: 0090-6964
eISSN: 1573-9686
IDS Number: GC5GP
Unique ID: WOS:000429815200004
PubMed ID: 29427158
*Record 2 of 6. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title: Parametric study on the starting of a free-piston engine alternator
Authors: Yuan, CH; Xu, J; He, YT
Author Full Names: Yuan, Chenheng; Xu, Jing; He, Yituan
Source: INTERNATIONAL JOURNAL OF ENGINE RESEARCH, 19 (4):411-422; 10.1177/1468087417712161 APR 2018
Language: English
Abstract: The free-piston engine alternator is a new crankless engine. The traditional starting method cannot be used to conveniently initialize the new engine. This article introduced a resonance starting method and investigated the effects of influential parameters on the free-piston engine alternator starting. An experimental free-piston engine alternator prototype was developed, and the effects of starting force, connecting rod length, and piston assembly mass on the resonance starting were experimented. Experimental results show that the piston motion is influenced by the starting force, and the final compression ratio of the engine is increased with the enlarged thrust force. A more high starting compression ratio can be obtained by either increasing or decreasing from the certain translator mass. The experiment also suggests that properly enlarging the connecting rod length can enhance the starting capacity of a linear alternator with a constant force. Moreover, an advanced simulation model was presented for the parametric study of the starting process. The effects of heat transfer, friction, and leakage on the resonance starting were investigated. Simulation indicates that the heat transfer is a significant inference on free-piston engine alternator starting, and the peak gas pressure varies in negative correlation with the piston ring closed clearance and friction load. As a result, the starting control strategy of free-piston engine alternator is required to consider these influential parameters.
ISSN: 1468-0874
eISSN: 2041-3149
IDS Number: GC5QV
Unique ID: WOS:000429843900002
*Record 3 of 6. Search terms matched: CHONGQING 400074(1); CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title: Heat transfer deterioration in helically coiled heat exchangers in trans-critical CO2 Rankine cycles
Authors: Liu, XX; Xu, XX; Liu, C; Bai, WJ; Dang, CB
Author Full Names: Liu, Xinxin; Xu, Xiaoxiao; Liu, Chao; Bai, Wanjin; Dang, Chaobin
Source: ENERGY, 147 1-14; 10.1016/j.energy.2017.12.163 MAR 15 2018
Language: English
Abstract: The heat transfer deterioration (HTD) of supercritical CO2 encountered in trans-critical CO2 Rankine cycle is an important issue related the safety of the whole unit. For the purpose, numerical simulations are performed to get a further insight into the mechanism of heat transfer characteristics of supercritical CO2 flow in helically coiled tube (HCT) both in horizontal and vertical orientations with parameters in a range of p = 8 MPa, G = 100-800 kg/m(2)s and q = 15-140 kW/m(2). The Shear-Stress Transport (SST) k-omega turbulence model with enhanced wall treatment method is employed to handle the coupled wall-to-fluid heat transfer. Results show that secondary flow induced by the coil curvature produces a transverse transport of the fluid over the cross section of the pipe and therefore enhances the heat transfer. Additionally, in the vertical oriented HCT, the HTD at supercritical pressure observed in a smooth straight tube (ST) is significantly alleviated. At a higher q/G, the HTD still exists irrespective of coil orientations. But, different from ST, the HID in HCT is caused by both gravitational and centrifugal buoyancy force. Therefore, the onset of HID in HCT cannot be predicted by the empirical correlation (q = 0.0002G) derived from analytical and experimental results for ST. Based on numerical calculation, an improved buoyancy parameter is developed to predict buoyancy effect on vertical HCT with an internal upward flow. (C) 2018 Elsevier Ltd. All rights reserved.
ISSN: 0360-5442
eISSN: 1873-6785
IDS Number: GB9JW
Unique ID: WOS:000429391100001
*Record 4 of 6. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title: Fault diagnosis for the motor drive system of urban transit based on improved Hidden Markov Model
Authors: Huang, DR; Ke, LY; Chu, XY; Zhao, L; Mi, B
Author Full Names: Huang Darong; Ke Lanyan; Chu Xiaoyan; Zhao Ling; Mi Bo
Source: MICROELECTRONICS RELIABILITY, 82 179-189; 10.1016/j.microrel.2018.01.017 MAR 2018
Language: English
Abstract: Fault diagnosis for the motor drive system of urban rail transit could reduce the hidden danger and avoid the disaster events as far as possible. In this paper, an improved Hidden Markov Model (HMM) algorithm is proposed for fault diagnosis of motors equipment for urban rail transit. In this approach, the initial value for observation matrix B in HMM is selected based on the predictive neural network and intuitionistic fuzzy sets. Firstly, by predictive neural network the observation probability matrix B is described qualitatively based on its mathematical explanation. Then, the quartering approach is introduced to define the rules between non-membership degree and observation probability matrix B, which obtains the matrix B quantitatively. Next, the selection algorithm for matrix B is given. Finally, the experiments about the motor drive system fault diagnosis of the urban rail transit are made to prove the feasibility for the proposed algorithm.
ISSN: 0026-2714
IDS Number: GB1QP
Unique ID: WOS:000428825600021
*Record 5 of 6. Search terms matched: CHONGQING 400074(2); CHONGQING JIAOTONG(2)
*Click Here to View Full Record
*Order Full Text [ ]
Title: Preparation and Performance of PVC/CNT Nanocomposite
Authors: Wang, XH; Mu, YH; Tang, Q; Li, CQ
Author Full Names: Wang, Xiao Hua; Mu, Yuan Hua; Tang, Qi; Li, Chuan Qiang
Source: ADVANCES IN POLYMER TECHNOLOGY, 37 (2):358-364; 10.1002/adv.21674 MAR 2018
Language: English
Abstract: The PVC/CNT nanocomposite was prepared with commercial poly(vinyl chloride) (PVC) beads and multiwall carbon nanotube (CNT). The comparative values of the electromagnetic interference shielding effectiveness (EMI SE) and electrical conductivity of PVC/CNT nanocomposite in the presence and absence of PVC beads were described. The results showed that the EMI SE values and electrical conductivity values of PVC/CNT nanocomposite had increased compared to those without PVC beads. After the addition of PVC beads, both values of the EMI SE and electrical conductivity had also increased with the increasing of the amount of PVC bead on the PVC/CNT nanocomposite, and the PVC/CNT nanocomposite in the presence of PVC bead showed high EMI SE value (22.6 dB at 4.0 wt% CNT loading in the presence of 70 wt% bead) and high conductivity value (5.31x10(-2)S cm(-1) at 1.0 wt% CNT loading in the presence of 70 wt% bead) at low CNT loading. Thus, PVC beads effectively play a major role in enhancing the EMI SE value and electrical conductivity value of the nanocomposite. To check the bead region and solvent-dried CNT region in the nanocomposite, morphological studies have been done and morphological studies of the PVC/CNT nanocomposite supported the two-phase regions in the composite and the selective dispersion of the CNT in the solvent-dried phase has been clearly observed.
ISSN: 0730-6679
eISSN: 1098-2329
Article Number: 21674
IDS Number: GB1XA
Unique ID: WOS:000428843400006
*Record 6 of 6. Search terms matched: CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title: Mix design of asphalt mixture used for the waterproof and anti-cracking layer in the rainy area of South China
Authors: Liu, FM; Dong, AX; Liu, CQ; Wu, WQ
Author Full Names: Liu, Fuming; Dong, Aixia; Liu, Chaoqun; Wu, Wenqing
Source: JOURNAL OF APPLIED BIOMATERIALS & FUNCTIONAL MATERIALS, 16 112-118; 1 10.1177/2280800017753052 JAN 2018
Language: English
Abstract: Introduction: In this study, the asphalt mixture (porosity < 2%) was tested for use between the upper and middle layers of the asphalt pavement to improve its interlayer structure and to enhance its related waterproof and anti-cracking ability. methods: considering the weather characteristics and traffic conditions in jiangxi province, appropriate raw materials were selected. based on the technical indexes of the raw materials, expected porosity (< 2%), and ac-5 standard for the asphalt mixture, experiments were conducted to determine the best gradation range of the waterproof and anti-cracking layer, and to obtain the optimum amount of the asphalt and fiber used based on marshall tests. results: the high-temperature rutting test, low-temperature cracking test, and water stability test were conducted to evaluate the pavement performance of the waterproof and anti-cracking layer. conclusions: a waterproof and anti-cracking layer was added between the upper and middle layers of the asphalt pavement, which has excellent performance for avoiding cracks and water damage.
ISSN: 2280-8000
IDS Number: GC5VU
Unique ID: WOS:000429859100015
PubMed ID: 29618260
二、SSCI1条
*Record 1 of 1. Search terms matched: CHONGQING JIAOTONG(1)
*Click Here to View Full Record
*Order Full Text [ ]
Title: Constraints to achieve infrastructure sustainability for mountainous townships in China
Authors: She, YJ; Shen, LY; Jiao, LD; Zuo, J; Tam, VWY; Yan, H
Author Full Names: She, Yujuan; Shen, Liyin; Jiao, Liudan; Zuo, Jian; Tam, Vivian W. Y.; Yan, Hang
Source: HABITAT INTERNATIONAL, 73 65-78; 10.1016/j.habitatint.2018.01.009 MAR 2018
Language: English
Abstract: This paper investigates the constraints to achieving optimal infrastructure sustainability for mountainous townships in Southwest China. Although such townships are relatively less developed, it is well recognized that investment in infrastructure projects in less developed townships plays a vital role in China's sustainable development mission. While the benefits of infrastructure investments are usually measured by means of economic performance, their long-term sustainability performance is largely overlooked. It is therefore imperative to understand the constraints that impede infrastructure sustainability and what corrective actions can be taken. The constraints are identified in this study via exploratory factor analysis and structural equation modeling. Twenty-one townships in the mountainous regions of Southwest China were investigated by means of a questionnaire survey. The study reveals that the major constraints include four dimensions: "Economic Capacity", "Governance and Management", "Policy Instrument and Public Participation", and "Local Geographic Characteristics". Identification of these constraints provides a valuable reference for local governments to take adequate measures to ensure that their infrastructure sustainability can be improved.
ISSN: 0197-3975
eISSN: 1873-5428
IDS Number: GC1DR
Unique ID: WOS:000429518200008
三、EI 3条
1. BSSReduce an O(|U|) incremental feature selection approach for large-scale and high dimensional data
Accession number: 20181605023194
Authors: Gong, Ke (1); Wang, Yong (2); Xu, Maozeng (3); Xiao, Zhi (4)
Author affiliation: (1) School of Management, Chongqing Jiaotong University, Chongqing, Chongqing China 400074 (e-mail: gks_cn@163.com); (2) School of Economic Management, Chongqing Jiaotong University, chongqing, chongqing China (e-mail: yongwx6@gmail.com); (3) School of Economic Management, Chongqing Jiaotong University, Chongqing China (e-mail: xmzzrxhy@cqjtu.edu.cn); (4) College of Economics and Business Administration, Chongqing University, Chongqing China (e-mail: xiaozhi@cqu.edu.cn)
Source title: IEEE Transactions on Fuzzy Systems
Abbreviated source title: IEEE Trans Fuzzy Syst
Issue date: April 9, 2018
Publication year: 2018
Language: English
ISSN: 10636706
CODEN: IEFSEV
Document type: Article in Press
Publisher: Institute of Electrical and Electronics Engineers Inc.
Abstract: With the advent of big data era, data become bigger than ever. Recently, as a fundamental task of pattern recognition, predict and data mining, feature selection has aroused wide public concern. However, extant methods on feature selection have an O(|C|$^{ 2} $|U|$^{ y} $) time complexity, which is the bottleneck preventing people from exploring knowledge in large-scale or high dimensional data sets. In this paper, based on bijective soft sets, we propose a new rationale for feature selection, which can help to break the bottleneck. Subsequently, this paper proposes an $O(\ left|U\ right|)$ feature selection method, whose computational time increases linearly only with the number of instances. To validate the proposed method, we conduct extensive experiments on UCI data sets, in which large-scale and high-dimensional data sets containing four million instances and over three million features are included. The results reveal that the proposed method is an efficient and effective and outperforms traditional methods in runtime, which can save massive computing resources. Moreover, the proposed method can be applied to feature selection for large-scale and gigantic-dimensional data sets, which are hard to be processed with traditional methods. IEEE
Main heading: Big data
Controlled terms: Clustering algorithms - Data mining - Economics - Feature extraction - Job analysis - Rough set theory
Uncontrolled terms: Computational time - Feature selection methods - High dimensional data - Massive computing - Runtimes - Soft sets - Task analysis - Time complexity
Classification code: 723.2 Data Processing and Image Processing
Data Processing and Image Processing
- 903.1 Information Sources and Analysis
Information Sources and Analysis
- 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
Combinatorial Mathematics, Includes Graph Theory, Set Theory
- 971 Social Sciences
Social Sciences
DOI: 10.1109/TFUZZ.2018.2825308
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
2. An advanced vehicle–slab track interaction model considering rail random irregularities
Accession number: 20181605023464
Authors: Xu, Lei (1); Chen, Zhaowei (2); Zhai, Wanming (1)
Author affiliation: (1) Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu, People’s Republic of China; (2) Chongqing Jiaotong University, School of Mechanotronics & Vehicle Engineering, Chongqing, China
Corresponding author: Zhai, Wanming(wmzhai@swjtu.edu.cn)
Source title: JVC/Journal of Vibration and Control
Abbreviated source title: JVC/J Vib Control
Issue date: 2017
Publication year: 2017
Language: English
ISSN: 10775463
E-ISSN: 17412986
CODEN: JVCOFX
Document type: Article in Press
Publisher: SAGE Publications Inc.
Abstract: This paper investigates a more advanced vertical vehicle–slab track interaction model (VTIM) by considering the discontinuity of track slabs, besides, it can be degenerated to the traditional two-dimensional model conveniently. Moreover, a cyclic calculation method (CCM) is further developed to solve infinite length calculations. On this basis, the proposed dynamic model and CCM are validated by comparing with the more comprehensive three-dimensional train–track model and fixed-point excitation method. Then, from aspects of probability statistics and frequency analysis, an illustrative example is particularly conducted to comprehensively characterize the dynamic responses of vehicle–slab track systems, in which the representative and realistic rail irregularity sets simulated by the track irregularity probabilistic model are used as the loading inputs. Results show that, with a low consumption of computational time and computer memory, the dynamic results derived from VTIM and CCM have a high accuracy, which indicates that the proposed dynamic model and calculation method can be efficiently and accurately used to analyze train–slab track interactions. ? 2017, The Author(s) 2017.
Main heading: Railroad tracks
Controlled terms: Dynamic models - Vehicles - Vibrations (mechanical)
Uncontrolled terms: Calculation models - Modeling and calculations - Probabilistic modeling - Probability statistic - Rail irregularities - Random vibrations - Slab tracks - Two dimensional model
Classification code: 681.1 Railway Plant and Structures, General
Railway Plant and Structures, General
- 921 Mathematics
Mathematics
- 931.1 Mechanics
Mechanics
DOI: 10.1177/1077546317731005
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
3. Study on the impact factors of pedestrian behaviors and the choice prediction model during the pedestrian clearance time
Accession number: 20181605021289
Authors: Zhang, H. (1); Wang, Y. (1)
Author affiliation: (1) School of Traffic and Transportation, Chongqing Jiaotong University, 66 Xuefu Road, Nan’an, Chongqing; 400074, China
Source title: Advances in Transportation Studies
Abbreviated source title: Adv. Transp. Stud.
Volume: 44
Issue date: April 1, 2018
Publication year: 2018
Pages: 21-32
Language: English
ISSN: 18245463
Document type: Journal article (JA)
Publisher: Gioacchino Onorati Editore, Via Delle Strelitzie, 35,, Sama Palomba, Roma, 00134, Italy
Abstract: Pedestrian clearance time refers to a transition period when pedestrians may experience a psycho-physical process before deciding to cross the intersection. This paper focuses on this period and aims at exploring the impact factors of the pedestrian choice behavior. Three crosswalk sites with the pedestrian signal are selected to take the intercept survey on-street in Chongqing, China. Besides, questionnaires are designed according to the psychological model of planned behavior theory. Then Pedestrians are solicited to finish the questionnaire after they go through the crosswalk. At the same time, cameras are used to record the entire process of pedestrian’s behaviors, signal information, and intersection geometries, etc. The contributory factors, such as pedestrian’s gender, accompanied, display of the pedestrian clearance time, the length of the crosswalk, refuge, pedestrian red time, and the pedestrian’s psychological behaviors, to the pedestrian’s choice were analyzed. However, age and driving license holding was less important. Finally, pedestrian’s choice behaviors are predicted using a logistic regression model in accordance with these factors during the pedestrian clearance time. ? 2018, Gioacchino Onorati Editore. All rights reserved.
Number of references: 22
Main heading: Behavioral research
Controlled terms: Crosswalks - Regression analysis - Surveys
Uncontrolled terms: Intercept surveys - Logistic Regression modeling - Pedestrian clearance time - Questionnaire - Theory of Planned Behavior
Classification code: 406.2 Roads and Streets
Roads and Streets
- 922.2 Mathematical Statistics
Mathematical Statistics
- 971 Social Sciences
Social Sciences
DOI: 10.4399/97888255143462
Funding Details: Number; Acronym; Sponsor: 51508061; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
