Results 151 to 160 of about 847,489 (307)

StrayCare Metro: Evaluation of a Targeted Cat Desexing Program to Manage Free-Roaming Cats. [PDF]

Animals (Basel)
Ma GC, Zito S, Kennedy BPA.
europepmc   +1 more source

Periodic Metro Scheduling.

, 2006
We introduce the { extsc{Periodic Metro Sched-ul-ing}} ({ extsc{PMS}}) problem, which aims in generating a periodic timetable for a given set of routes and a given time period, in such a way that the minimum time distance between any two successive trains that pass from the same point of the network is maximized.
Bampas, Evangelos, Kaouri, Georgia, Lampis, Michael, Pagourtzis, Aris   +3 more
openaire   +3 more sources

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Study on the mechanism of rolling contact fatigue in the central section of wheel treads for metro vehicles

机车电传动
Rolling contact fatigue (RCF) is a common form of wheel damage of metro vehicles, which has significant impacts on operational safety and maintenance of wheels. This paper focuses on the RCF observed in wheels used on a metro line in China.
YUAN Xinyi, GAO Ennan, TAO Gongquan
doaj  

Design optimization and performance evaluation of semi-prefabricated UHPC-RC metro station structures. [PDF]

Sci Rep
Lei G, Hua F, Yang Z, Jiang F, Zhu J.
europepmc   +1 more source

Critical expansion points: Mechanical signs of surrounding rock instability

Deep Underground Science and Engineering, EarlyView.
This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen, Chang Deng, Haijun Wang, Lei Tang, Jihong Yu   +4 more
wiley   +1 more source

Trends in primary surgery and overall survival in non-metastatic anal cancer: a population-based analysis. [PDF]

Oncologist
Shen C, Conces M, Ciombor K, Dorth J, Meyer JE, Geiger TM, Khan A, Aquino J, Lockney NA, Chakravarthy AB, Whisenant J, Benson AB, Eng C.   +12 more
europepmc   +1 more source

Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures

Deep Underground Science and Engineering, EarlyView.
This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao, Jiachen Xu, Kai Zhang, Changtai Zhou   +3 more
wiley   +1 more source

Impact of the COVID-19 pandemic on palliative care services in the Cape Metro District of South Africa. [PDF]

Palliat Care Soc Pract
Arendse JO, Zweigenthal V, Gwyther L.
europepmc   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source