Results 71 to 80 of about 6,139 (291)

Nonlinear Impacting Dynamic Model of a Metro Vehicle

Journal of Mechanical Engineering, 2012
In the case of the consideration of the nonlinear stiffness and damping of couplers and buffers,friction force between wheel and rail,the nonlinear dynamic impacting model of metro vehicle group is established.The nonlinear stiffness and damping of the buffer are determined by means of test.Simulation results of impacting characteristics between one ...
openaire   +1 more source

Land Use Transformation and Climate Resilience in Smart Cities: Role of ICT in Modern Urban Planning

Land Degradation &Development, EarlyView.
ABSTRACT Modern urban planning is experiencing a transition from traditional planning to the integration of information technology, which defines the concept of a “smart city”. The study analyses the evolution of urban planning practices with an emphasis on the role of engineering and architecture in the process of urbanization, the transition to the ...
Dariusz Cichoń
wiley   +1 more source

The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review

Journal of Field Robotics, EarlyView.
ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton, Daniel Mitchell, Jamie Blanche, Euan McGookin, David Flynn   +4 more
wiley   +1 more source

Fatigue Damage Assessment of a Metro Vehicle Bogie Frame Based on Measured Field Load

As the operating conditions of metro vehicles become more complex, the fatigue damage of metro bogie frames under actual operating conditions becomes increasingly difficult to evaluate realistically.
Zunsong Ren, Yangmin Wu
core   +1 more source

The Role of Fintech and the Shadow Economy in Advancing Sustainable Development Across G7 Countries: Evidence From MMQR Analysis

Sustainable Development, EarlyView.
ABSTRACT Achieving sustainable development requires balancing economic growth with environmental conservation, but the relationship between informal economic activities and emerging financial technologies in boosting green growth (GG) is not well understood.
Muhammad Salah Uddin, Rashed Jahangir, Mamunur Rashid, Muhammad Hassan Abbas, Md. Al Amin   +4 more
wiley   +1 more source

Funding, Facilities, and the Face of Homelessness: Heterogeneous Impacts of Federal Grants on Sheltered and Unsheltered Counts

Southern Economic Journal, EarlyView.
ABSTRACT This paper examines the causal impact of federal homeless‐assistance grants on reported homelessness and shelter capacity across 370 Continuums of Care in 2019. We exploit cross‐sectional variation in pre‐1940 housing shares, used in Community Development Block Grant formula allocations, as an instrument for combined CoC and Emergency ...
Luke Maddock, Anita Alves Pena
wiley   +1 more source

Analysis and Optimization of Influencing Factors for Turnout Lateral Passing Performance of Rubber-tired Metro

Chengshi guidao jiaotong yanjiu
［Objective］ In the turnout section, the wheel-rail relationship of the rubber-tired metro vehicle is relatively special as it is the rubber tire that provides running support and the steel wheel that provides guidance.
DU Zixue, XU Chenyu, YANG Zhen, LIAO Congjian   +3 more
doaj   +1 more source

Perfluorohexanone for Clean Fire Suppression: Mechanisms, System Design, Applications, and Future Directions

Safety Science and Technology, EarlyView.
Driven by halon and high GWP agent phase out, perfluorohexanone is increasingly deployed in enclosures such as data centers, marine machinery spaces, and industrial process lines. This review summarizes application performance, discharge and distribution design, material compatibility, and byproduct control and maps practical gaps for large volume and ...
Zhilei Yu, Haibin Dong, Yanfeng Sheng, Xuelei Xian, Dehua Zhang, Feiran Li, Liang Liu, Junchao Zhao, Heping Zhang   +8 more
wiley   +1 more source

Experimental and Numerical Investigation of Bogie Hunting Instability for Railway Vehicles Based on Multiple Sensors

Sensors
Bogie hunting instability is one of the common faults in railway vehicles. It not only affects ride comfort but also threatens operational safety. Due to the lower operating speed of metro vehicles, their bogie hunting stability is often overlooked ...
Biao Zheng, Lai Wei, Jing Zeng, Dafu Zhang   +3 more
doaj   +1 more source

Comparison on Simulation and Experiment of Supply Air through Metro Vehicle Air Conditioning Duct

, 2010
CFD technique is often employed to simulate and optimize air duct design, but the corresponding experiment validation in metro vehicle is rare. By taking an independent metro vehicle duct as research object in this paper, supply air through air duct is ...
Jun Zhi Jiang, Jun Long Xie, Hong Ge Tao, Huan Xin Chen   +3 more
core   +1 more source