Results 41 to 50 of about 347,607 (294)

Bandgap mechanism and vibration reduction property of wave-resistance sleeper with negative effective mass density

AIP Advances, 2021
Based on the capability of controlling low-frequency elastic waves in solids with subwavelength size, locally resonant phononic crystals have potential applications in track vibration reduction.
Rixin Cui, Jinsong Zhou, Dao Gong, Shiqiao Tian   +3 more
doaj   +1 more source

Controlled Growth of Boron Nitride in Various Phases

Advanced Materials Interfaces, EarlyView.
Phase‐selective boron nitride growth is presented as a unified materials‐design problem across hexagonal, rhombohedral, cubic, and amorphous phases. By linking synthesis routes to thermodynamic stability, kinetic accessibility, surface diffusion, interfacial templating, and energetic activation, this review clarifies how bonding and stacking are ...
Pan Wu, Kanghao Xie, Jiajie Qi, Xiaorui Zheng, Kaihui Liu, Xuedong Bai, Li Wang   +6 more
wiley   +1 more source

Impact of Frog Height Deviations on Dynamic Response of High-Speed Metro Trains Negotiating Turnouts

Shock and Vibration
Composite frogs inevitably have manufacturing or installation errors, leading to deviations in the height of the frogs, which affects the dynamic performance of trains passing through turnouts.
Dongliang Zeng, Shan Jin, Fei Chen, Xiaoyu Hu, Xiuqi Wei, Kaiyu Zeng, Wang Kaiyun, Chang Li   +7 more
doaj   +1 more source

Method for Evaluating Bolt Competitive Failure Life Under Composite Excitation

Chinese Journal of Mechanical Engineering, 2023
In this study, the competitive failure mechanism of bolt loosening and fatigue is elucidated via competitive failure tests on bolts under composite excitation.
Guangwu Yang, Long Yang, Han Zhao, Haoxu Ding, Bing Yang, Shoune Xiao   +5 more
doaj   +1 more source

3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications

Advanced Robotics Research, EarlyView.
Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun, Jan Petrš, Omar Aloui, Dario Floreano   +3 more
wiley   +1 more source

A Fault Diagnosis Method for Planetary Gearboxes Based on IFMD

Shock and Vibration
The vibration signal from the planetary gearbox exhibits nonlinear and impulsive characteristics amidst strong noise, impeding the effective extraction of fault information and compromising the accuracy of fault diagnosis.
Fengfeng Bie, Xueping Ding, Qianqian Li, Yuting Zhang, Xinyue Huang   +4 more
doaj   +1 more source

A Feature-Enhanced Informer Model with Complex Network Representation for Multi-Step Short-Term Passenger Flow Forecasting in Urban Rail Transit

Vehicles
As urban rail transit systems enter a stage of high-quality development, accurate short-term passenger flow forecasting has become essential for efficient operation and management. To improve the accuracy and robustness of multi-step short-term passenger
Gang Li, Junfeng An, Junguo Si, Dong Wang, Wenwen Gao, Yunyun Cen, Hang Yu   +6 more
doaj   +1 more source

The economics of crowding in rail transit [PDF]

Journal of Urban Economics, 2017
Abstract We model trip-timing decisions of rail transit users who trade off crowding costs and disutility from traveling early or late. With no fare or a uniform fare, ridership is too concentrated on timely trains. Marginal-cost-pricing calls for time-dependent fares that smooth train loads and generate more revenue than an optimal uniform fare. The
de Palma, André, Lindsey, Robin, Monchambert, Guillaume   +2 more
openaire   +2 more sources

Multidimensional and Multifunctional Laser‐Induced Graphene (LIG) for Point‐of‐Care and Wearable Biosensing, Theranostics, and Bioactive Interfaces Toward Personalized Healthcare and Regenerative Medicine

Advanced Science, EarlyView.
Multidimensional laser‐induced graphene (LIG) spanning from 0D to 3D architectures is comprehensively reviewed for multifunctional biomedical platforms, including biosensing, theranostics, and bioactive interface applications, which highlights its potentials for point‐of‐care diagnostics, wearable health monitoring, smart drug delivery, and tissue ...
Li Zhang, Yurou Yuan, Xiaohong Ding, Wing Cheung Mak   +3 more
wiley   +1 more source

Analysis of modal frequency optimization of railway vehicle car body

Advances in Mechanical Engineering, 2016
High structural modal frequencies of car body are beneficial as they ensure better vibration control and enhance ride quality of railway vehicles. Modal sensitivity optimization and elastic suspension parameters used in the design of equipment beneath ...
Wenjing Sun, Jinsong Zhou, Dao Gong, Taiwen You   +3 more
doaj   +1 more source