Results 61 to 70 of about 5,247 (220)

Analysis of cyclic failure in high-specific-energy Li-rich Si/C pouch batteries

open access: yes机车电传动
Capacity decay, performance decline, and other degradations experienced by lithium-rich silicon/carbon pouch batteries during repeated charging and discharging processes are collectively called cyclic failures.
WANG Zhonghai   +5 more
doaj  

Evaluation Method of Freight Car Maintainability Indices

open access: yesВестник Научно-исследовательского института железнодорожного транспорта, 2015
With emergence of market relations and competitive environment there can be observed intensive market saturation with a great number of railway car products supplied by domestic and foreign manufactures.
G. V. Raikov, S. V. Petrov
doaj  

Isoetes ×atruensis (Isoetaceae – Lycopodiopsida), a new interspecific sterile hybrid from Rajasthan of Western India

open access: yesNordic Journal of Botany, EarlyView.
Isoetes ×atruensis hyb. nov. is shown to be a triploid (2n = 3× = 33 + 1) sterile interspecific hybrid between diploid (2n = 2× = 22 + 1) I. coromandelina and tetraploid (2n = 4× = 44 + 1) I. rajasthanensis. It has been found in two locations in Rajasthan, India.
Sarvesh Kumar Singh   +4 more
wiley   +1 more source

Design and strength analysis of a test bench for brake calipers on suspended monorail trains

open access: yes机车电传动
Brake calipers serve as the actuators in braking systems and are critical components for ensuring the safe operation of trains. However, there is currently a lack of dedicated test benches for brake calipers used on suspended monorail trains that employ ...
JIANG Yongzhi   +4 more
doaj  

Large, rugged and remote: The challenge of wolf–livestock coexistence on federal lands in the American West

open access: yesPeople and Nature, EarlyView.
Abstract The expansion of grey wolves (Canis lupus) across the western United States, including on public lands used for extensive livestock grazing, requires tools and techniques for reducing wolf–livestock conflict and supporting coexistence. We examined approaches used on forested lands managed by the U.S.
Robert M. Anderson   +3 more
wiley   +1 more source

Simulation and experimental study on aerodynamic characteristics of urban rapid trains in tunnel operation

open access: yes机车电传动
This study addresses the aerodynamic challenges faced by urban rapid trains during full-tunnel operation, focusing on transient pressure fluctuations induced when trains pass through tunnels and micro-pressure waves at tunnel exits.
CHEN Xijun   +4 more
doaj  

Views from the hill: Deer stalkers' perspectives on land‐use change in the Scottish Highlands

open access: yesPeople and Nature, EarlyView.
Abstract Land‐use and wildlife management are changing globally as part of efforts to address contemporary environmental challenges. In the Scottish Highlands, the hunting—or ‘stalking’—of deer has entered a period of considerable flux primarily because of national policy changes to mitigate climate change and biodiversity loss.
Callum Leavey‐Wilson   +2 more
wiley   +1 more source

Research on installation solution of eddy current braking devices on EMU bogies

open access: yes机车电传动
This research explored a solution for installing linear eddy current braking devices on the bogies of existing 400 km/h EMUs, aiming to make their braking systems more economical and environmentally friendly.
LIU Chao   +4 more
doaj  

Disentangling conservation asymmetries through socio‐economic transboundary factors across the Alto Paraná Atlantic Forest of South America

open access: yesPeople and Nature, EarlyView.
Abstract Ecoregions are often defined based on homogeneous biophysical and ecological conditions and are optimal spatial units for designing conservation strategies. However, transboundary ecoregions such as the Alto Paraná Atlantic Forest (APAF) experience asymmetrical conservation outcomes, understood here as cross‐border differences, resulting from ...
Lía Montti   +16 more
wiley   +1 more source

A decoupling method for wheel-rail contact forces of heavy-duty trains based on big data and neural networks

open access: yes机车电传动
To accurately identify and predict wheel-rail contact forces during the operation of heavy-duty trains, this paper proposes a novel method of decoupling and predicting these forces based on big data related to non-contact strain at the wheel periphery ...
ZHANG Zhenhui   +4 more
doaj  

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