Results 101 to 110 of about 7,526 (294)

Pressure Wave Control Scheme for Metro Vehicle at Speed of 120 km/h

Chengshi guidao jiaotong yanjiu
Objective With the increasing demand for passenger comfort in urban rail transit, pressure wave control inside metro trains at speed of 120 km/h and above has become a an essential function of train air-conditioning system.
FENG Xuwei, ZHAO Jun, CHEN Yuan, YU Guanglu   +3 more
doaj   +1 more source

Tread braking of railway wheels – temperatures generated by a metro train

, 2014
Tread braking of railway wheels results in the kinetic energy of the train being dissipated into the wheel and blocks in the form of heat. This heat is further conducted into adjacent structures, notably the cold rail, and also transferred into the ...
Blennow, Fredrik,, Vernersson, Tore, Teimourimanesh, Shahab,, Teimourimanesh, Shahab, Lundén, Roger,, Lundén, Roger, Vernersson, Tore V, Meinel, Markus,, Lund\ue9n, Roger, Vernersson, Tore V,, Blennow, Fredrik, Meinel, Markus   +11 more
core   +1 more source

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Simulation Research on Metro Train Control Circuit Based on Network Topology

Chengshi guidao jiaotong yanjiu
[Objective] To meet the training needs of metro drivers and maintenance personnel in studying metro control circuit principles, a MTCCS (metro train control circuit simulation system) is designed to address the issues of high coupling and complex control
Yinfeng LU, Xuejun QIAN
doaj   +1 more source

Using Smart Card Data Trimmed by Train Schedule to Analyze Metro Passenger Route Choice with Synchronous Clustering

Journal of Advanced Transportation, 2018
The metro passenger route choice, influenced by both train schedule and time constraints, is important to metro operation and management. Smart card data (Automatic Fare Collection (AFC) data in metro system) including inbound and outbound swiping time ...
Wei Li, Qin Luo, Qing Cai, Xiongfei Zhang   +3 more
doaj   +1 more source

Life Cycle Assessment of a heavy metro train

Journal of Cleaner Production, 2015
The railway system represents one of the most resource-efficient answer to the ever-growing demand for transport service. Development trends for the following years project substantial increase in this sector. To date, environmental effects caused by railway transport services have been rarely inspected systematically and existing studies focus on ...
Francesco Del Pero, DELOGU, MASSIMO, PIERINI, MARCO, Davide Bonaffini   +3 more
openaire   +2 more sources

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

Deep Underground Science and Engineering, EarlyView.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan, Chenxi Yin, Guangdong Yang, Shengyong Ding, Bin Tian   +4 more
wiley   +1 more source

Nonsilting transport characteristics of coal slurry in a deep underground fluidization conveying pipeline under the action of a guide vane swirler

Deep Underground Science and Engineering, EarlyView.
Aiming at the scientific frontiers of in situ fluidized mining of deep resources, a deep coal fluidized pipeline lifting system based on hydraulic conveying has been proposed. To solve the issue of particle sedimentation of large particles in horizontal connection sections, a solution involving the installation of guide vane‐type swirlers in the ...
Jiusheng Bao, Shaodi Zhao, Yan Yin, Zhongbin Wang, Shuai Liu, Shirong Ge   +5 more
wiley   +1 more source

Real‐time monitoring of tunnel structures using digital twin and artificial intelligence: A short overview

Deep Underground Science and Engineering, EarlyView.
How artificial intelligence (AI) and digital twin (DT) technologies are revolutionizing tunnel surveillance, offering proactive maintenance strategies and enhanced safety protocols. It explores AI's analytical power and DT's virtual replicas of infrastructure, emphasizing their role in optimizing maintenance and safety in tunnel management.
Mohammad Afrazi, Danial Jahed Armaghani, Hossein Afrazi, Hadi Fattahi, Pijush Samui   +4 more
wiley   +1 more source

Modeling and Optimization of a Refrigeration System for Metro Train Air-conditioning

Zhileng xuebao, 2014
Though metro in China today is booming, the typical refrigeration system for metro train air-conditioning is at quite lower energy efficiency level (COP = 2.2-2.3) in comparison with the residential systems under the same operating conditions.
Yang Liang, Gao Jie, Zhang Chunlu
doaj