Results 71 to 80 of about 1,461,299 (208)

Bifurcation and Stability Analysis of Time-Delayed Wheelset System under White Noise Excitation

Considering the impact of time delay in the lateral stiffness of the primary suspension and stochastic disturbances of equivalent conicity on the wheelset system, a stochastic time-delayed wheelset system is established.

core   +1 more source

Wear of double crown systems: electroplated vs. casted female part

Journal of Applied Oral Science, 2012
OBJECTIVES: The wear of telescopic crowns is a common problem often reducing the patient's satisfaction with the denture and resulting in a renewal of the denture. The study aims to compare the wear behavior of conical crowns using electroplated copings (
Stefan Bayer, Dominik Kraus, Ludger Keilig, Lina Gölz, Helmut Stark, Norbert Enkling   +5 more
doaj   +1 more source

Analysis of the Impact of Frog Wear on the Wheel–Rail Dynamic Performance in Turnout Zones of Urban Rail Transit Lines

Lubricants
To investigate how severe wear at No. 12 turnout frogs in an urban rail transit line operating at speeds over 120 km/h on the dynamic performance of the vehicle, a vehicle–frog coupled dynamic model was established by employing the 2021 version of ...
Yanlei Li, Dongliang Zeng, Xiuqi Wei, Xiaoyu Hu, Kaiyun Wang   +4 more
doaj   +1 more source

Holistic embedding of equivalent conicity in wheelset maintenance

, 2023
With continuing digitization of railways an increasing number of data is recorded but particularly in operation advanced analysis tends to be partially rudimentary. Yet, it is essential to implement sophisticated processing for all records in order to develop more purposeful and predictive vehicle maintenance strategies that adhere to the increasing ...
openaire   +1 more source

Grinding Management of Rail Profile Based on Abnormal Hunting of High-speed Train

机车电传动, 2020
To study the influence of the polished depth of rail profile at the gauge angle on the low-frequency vibration of high-speed train, a group of rail profiles were obtained by interpolating between the standard CN60 profile and the measured rail profile ...
Jingwei CHEN, Tao CUI, Jianfeng SUN, Wei WANG   +3 more
doaj  

Continuity Conditions for Piecewise Quadratic Functions on Simplicial Conic Partitions are Equivalent

IEEE Transactions on Automatic Control
Analysis of continuous-time piecewise linear systems based on piecewise quadratic (PWQ) Lyapunov functions typically requires continuity of these functions over a partition of the state space. Several conditions for guaranteeing continuity of PWQ functions over state space partitions can be found in the literature.
M. J. Erlandsen, T. J. Meijer, W. P. M. H. Heemels, S. J. A. M. van den Eijnden   +3 more
openaire   +2 more sources

Prediction and Control of Wheel Wear of a High-Speed Train Based on Measured Data and Simulation

Increased equivalent conicity of wheels because of hollow wear during long-term operation influences the ride comfort performance of Chinese high-speed trains.
Chen, Gang,, Stichel, Sebastian,, Hossein Nia, Saeed,, Netter, Helmut,, Ding, Xin,, Khoramzad, Elham,, Giossi, Rocco Libero,, Liu, Zhendong,   +7 more
core   +1 more source

Design of optimized tread profile for high-speed EMUs

机车电传动
To address two significant issues in high-speed electric multiple units (EMU), i.e. degraded vehicle dynamic performance under existing wheel-rail interactions and increased wheel tread wear at elevated operating speeds, this paper proposes an optimized ...
SUN Weinan, CHI Maoru, XIE Yucheng, CAI Wubin, ZHANG Xiao, CHEN Yongfa   +5 more
doaj  

Rail Vehicle Dynamics Simulation-based decision support for novel block brake material implementation in Sweden

, 2019
. The application of TSI Noise in Sweden needs decision support that can objectively state system-wide benefits and disadvantages, as there are issues with the introduction of novel block brakes: reduced braking performance and increased equivalent ...
Tohmmy, Bustad,, Tohmmy, Bustad, Dirks, Babette, Casanueva, Carlos, Casanueva, Carlos,, Dirks, Babette,   +5 more
core   +1 more source

On the Equivalence of Zero-Sum Games and Conic Programs

Mathematics of Operations Research
We prove the almost equivalence of the minimax theorem and the strong duality theorem for a large class of games and conic programs. The previous fundamental results on the equivalence of linear programming and two-player zero-sum games with simplex strategy sets are extended to Banach spaces, and a comprehensive framework unifying two-player zero-sum ...
openaire   +2 more sources