scholarly journals GROUND SUBSIDENCE ALONG SHANGHAI METRO LINE 6 BY PS-InSAR METHOD

2018 ◽  
Vol XLII-3 ◽  
pp. 1889-1893 ◽  
Author(s):  
J. Wu ◽  
M. Liao ◽  
N. Li
Keyword(s):  
Ground Deformation ◽  
Rapid Development ◽  
Vertical Direction ◽  
Urban Rail Transit ◽  
Displacement Rate ◽  
Rail Transit ◽  
Maximum Displacement ◽  
Envisat Asar ◽  
Urban Rail ◽  
Shanghai Metro

With the rapid development of urban economy, convenient, safe, and efficient urban rail transit has become the preferred method for people to travel. In order to ensure the safety and sustainable development of urban rail transit, the PS-InSAR technology with millimeter deformation measurement accuracy has been widely applied to monitor the deformation of urban rail transit. In this paper, 32 scenes of COSMO-SkyMed descending images and 23 scenes of Envisat ASAR images covering the Shanghai Metro Line 6 acquired from 2008 to 2010 are used to estimate the average deformation rate along line-of-sight (LOS) direction by PS-InSAR method. The experimental results show that there are two main subsidence areas along the Shanghai Metro Line 6, which are located between Wuzhou Avenue Station to Wulian Road Station and West Gaoke Road Station to Gaoqing Road Station. Between Wuzhou Avenue Station and Wulian Road Station, the maximum displacement rate in the vertical direction of COSMO-SkyMed images is −9.92 mm/year, and the maximum displacement rate in the vertical direction of Envisat ASAR images is −8.53 mm/year. From the West Gaoke Road Station to the Gaoqing Road Station, the maximum displacement rate in the vertical direction of COSMO-SkyMed images is −15.53 mm/year, and the maximum displacement rate in the vertical direction of Envisat ASAR images is −17.9 mm/year. The results show that the ground deformation rates obtained by two SAR platforms with different wavelengths, different sensors and different incident angles have good consistence with each other, and also that of spirit leveling.

Design for Urban Rail Transit Energy Efficiency Management System

2013 ◽  
Vol 749 ◽  
pp. 629-633
Author(s):  
Jian Bin Ye ◽  
Zhi Yan Ding ◽  
Qi Zhu
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Management System ◽  
Rapid Development ◽  
Chinese Economy ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Service Architecture ◽  
Urban Rail ◽  
Emission Reduction Strategies

With the rapid development of Chinese economy and the speeding up urbanization, urban rail transit has entered a rapid development period, which results in more and more energy consumption. Meanwhile affected by energy source and environment factors, the state has implemented energy-saving emission reduction strategies in various fields, so energy efficient management for urban rail transit becomes more important. Based on the analysis of energy consumption problems in urban rail transit, the paper designs urban rail transit energy efficiency management system from the aspects of overall architecture, service architecture and application function, and provides technical support for the realization of the software system.

Adaptive Spectrum Management of Cognitive Radio in Intelligent Transportation System

2015 ◽  
Vol 743 ◽  
pp. 765-773 ◽  
Author(s):  
Cheng Wu ◽  
Y.M. Wang ◽  
Xiang Qiang ◽  
Z.Y. Zhang
Keyword(s):  
Cognitive Radio ◽  
Ad Hoc ◽  
Intelligent Transportation System ◽  
Environmental Changes ◽  
Rapid Development ◽  
Spectrum Management ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Value Functions ◽  
Urban Rail

With the rapid development of urban rail transit, the demand of the public in rail transportationto take real-time, reliable and efficient wireless access services, has become the focus of mobilebroadband communications. Wireless cognitive radio (CR) over urban rail transit is a newly emergingparadigm that attempts to opportunistically transmit in licensed frequencies, without affecting the preassignedusers of these bands. To enable this functionality, such a radio must predict its operationalparameters, such as transmit power and spectrum. These tasks, collectively called spectrum management,is difficult to achieve in a dynamic distributed environment, in which CR users may only takelocal decisions, and react to the environmental changes. In this paper, we propose a reinforcementlearning based approach for spectrum management. Our approach uses value functions to evaluate thedesirability of choosing different transmission parameters, and enables efficient assignment of spectrumsand transmit powers by maximizing long-term reward. We then investigate various real-worldscenarios, and compare the communication performance using different sets of learning parameters.The results proves our reinforcement learning based spectrum management can significantly reduceinterference to licensed users, while maintaining a high probability of successful transmissions in acognitive radio ad hoc network.

Research of Urban Rail Transit Vehicle Aluminum Alloy Bolster FSW Welding Technology Based on Thermal-Mechanical Coupling

2018 ◽  
Vol 773 ◽  
pp. 208-213 ◽  
Author(s):  
Ying Shi Sun
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Rapid Development ◽  
Engineering Application ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Mechanical Coupling ◽  
Friction Stir ◽  
Welding Technology ◽  
Urban Rail

With the rapid development of urban rail transit and the increasing level of research and development, aluminum alloy materials feature excellent physical and mechanical properties, and thus an urban rail transit vehicle adopts aluminum alloy materials. Friction Stir Welding (FSW) technology is adopted in the production process of a bolster in this article and research of stress strain of friction stir welding parts plays an important role for engineering application of friction stir welding technology.

Design and Implementation of Mobile Client for Passenger Dynamic Travel Information Enquiry in Urban Rail Transit Network

2014 ◽  
Vol 571-572 ◽  
pp. 502-506
Author(s):  
Qin Luo ◽  
Guan Di Ye ◽  
Jia Zhi Yang ◽  
Yi Kui Mo
Keyword(s):  
Rapid Development ◽  
Smart Phone ◽  
Mobile Internet ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Mobile Client ◽  
Travel Choice ◽  
Travel Information ◽  
Client Software ◽  
Urban Rail

With rapid development and popularity of smart phone and mobile internet, mobile client software (APP) is widely used in every aspect of daily life. To improve the informatization and intellectualization of Urban Rail Transit passenger services, the paper brings forward a method of optimal travel choice for passengers based on “dynamic travel time”(hereinafter to be referred as DTT), and also takes advantage of the Android platform to develop an APP for dynamic travel information enquiry. The structure of the APP and the key problems to be resolved during the development process are introduced. As the APP is applied into practice, it can provide passengers with effective support.

Urban Rail Transit Types and Single Wire on the Propagation Law of Delays

2016 ◽  
Vol 835 ◽  
pp. 763-766
Author(s):  
Dong Xue Zhang ◽  
Yan Hui Wang ◽  
Ya Fei Wang
Keyword(s):  
Rapid Development ◽  
Recursive Formula ◽  
Urban Rail Transit ◽  
Living Standard ◽  
Rail Transit ◽  
Urban Rail ◽  
Propagation Law ◽  
Politics And Culture ◽  
Several Delays

Along with our country, a steady and rapid development of economy, politics and culture, the traffic also got rapid development with the trend. The improvement of people's living standard in our country, more and more frequent transportation also emerged, the requirement for the quality of travel people also put forward higher requirements; Therefore, as a responsible for the daily commuter traffic tools, urban rail transit train delay problem should give our attention. The types of urban rail traffic delay is described in this paper, including the initial delay and joint and several delays, and expounds the time characteristics and spatial characteristics of delays, and the urban rail transit delays was studied, on the single line shows the single delays the transmission of the recursive formula, for the delay of the urban rail transit emergency disposal provides theory basis.

Method on Whole Rail Profile Auto-Matching and its Application in Urban Rail Transit

2012 ◽  
Vol 209-211 ◽  
pp. 846-850
Author(s):  
Wen Chen ◽  
Hai Feng Li ◽  
Yu De Xu
Keyword(s):  
Analytical Tool ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Practical Application ◽  
Measurement Instruments ◽  
Urban Rail ◽  
On Line ◽  
Rail Inspection ◽  
Shanghai Metro

With the increase in rail inspection technology, the whole rail profile can be measured by rail inspection cars or some typical static measurement instruments. Based on a large number of practical rail profile measurements, a whole rail profile auto-matching method is put forward to enhance the efficiency and accuracy of data analysis. An analytical tool applying this method is developed at the same time and the principle and calculation method of the tool will be introduced. Apart from this, data collected from in-situ measurements taken on line 2 of the Shanghai Metro will be performed and analyzed to verify this method. The main contributions of this paper are the generalization of an efficient analytical tool for the calculation of wear parameters at both specific and non-specific points and the practical application for comparison of data collected by both dynamic and static inspection with the standard, which proves that the method is correct and effective.

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