Results 21 to 30 of about 10,712 (195)
Optimization simulation and crushing experiment of anti-impact energy absorption component of hydraulic support column [PDF]
Hydraulic support, being the primary supporting equipment in coal mining operations, is frequently subjected to rock burst pressure. Hence, the anti-impact energy absorption components play a pivotal role in safeguarding the hydraulic support system ...
Liyong TIAN +4 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic‐scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd‐Cu nanoalloys from chemically disordered to highly ordered states by composition control and
Fan Xue +5 more
wiley +1 more source
Dianci bileiqi, 2022 直流换流站中性母线避雷器在限制过电压过程中需要吸收大量能量，因此采用大规模多柱并联结构。为了研究中性母线多柱并联避雷器组的故障暂态特性，基于宁东-青岛±660 kV特高压直流输电工程，利用PSCAD程序建立系统仿真模型，计算避雷器组参数并建立多柱并联避雷器组模型，仿真得到不同运行方式下典型故障时中性母线避雷器过电压、电流及吸收能量的波形，分析波形特征。研究避雷器组自身发生击穿故障时的特性以及对系统的影响。仿真结果显示，在发生单极阀顶接地故障时中性母线EM避雷器吸收能量21 MJ,当某一柱伏安特性降低10%
刘志远 +6 more
doaj
Total gastrectomy vs subtotal gastrectomy for the Control of blood pressure on spontaneously hypertensive rats and the exploration of underlying mechanism [PDF]
, 2015 背景：我们的临床研究发现胃癌合并原发性高血压的病人，进行全胃切除术及胃大部切除术后，降压效果有显著差异。也有文章提出，胃减容手术能够有效改善肥胖患者的血压。因而我们推论，单纯胃切除术即可对血压产生影响。胃减容手术在肥胖个体上改善血压的效果被主要归因于体重的降低；而水钠代谢的紊乱被认为是原发性高血压的重要发病原因之一，胃转流手术对于水钠代谢的改善作用也已被人所验证。那么胃切除手术改善血压的原因可能也是由于这两者的作用。因此，本实验的研究目的在于对比单纯胃大部切除及单纯全胃切除术对原发性高血压大鼠体血压 ...
金娜
core
Rare Metals, EarlyView.ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He +9 more
wiley +1 more source
A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
Rare Metals, EarlyView.ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source
Nanoindentation characterization of shale micromechanics and fracturing ability evaluation of reservoir [PDF]
The micromechanical properties of shale are the key basis for shale reservoir compressibility evaluation. In this paper, the Marine shales of Longmaxi Formation in Sichuan Basin, Changhanguou Formation in Shiguai Basin in Inner Mongolia and Yangye ...
Diankun ZHANG +4 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT The growing concern over human health issues, driven by increasingly severe electromagnetic pollution from 5G communication, has made the urgent development of high‐performance electromagnetic wave (EMW) absorbing materials. Although carbide‐based materials are promising because of their conductive and polarization losses, existing single ...
Chenqiang Duan +9 more
wiley +1 more source
Dianci bileiqi, 2018 金属氧化物避雷器作为过电压保护设备,对电力系统绝缘配合起着关键作用。金属氧化物避雷器的能量吸收能力是避雷器的重要特征性能,决定着其保护特性和自身的运行安全,已引起使用部门和制造者的普遍关注。避雷器的能量吸收能力主要取决于电阻片的能量吸收能力,在运行和试验过程中,电阻片会有哪些破坏形式,哪些因素会影响到电阻片的能量吸收能力,本文对此进行初步试验探讨。试验结果显示,电阻片的主要破坏形式有贯穿、开裂、闪络,影响电阻片能量吸收能力的主要因素有电阻片的起始温度、热容量、能量注入的形式。
艾三 +5 more
doaj
SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis
New Phytologist, Volume 249, Issue 4, Page 1816-1830, February 2026.Summary The stress‐responsive hormone abscisic acid (ABA) is known for its inhibitory effects on various physiological processes, including seed germination, often resulting in energy deprivation. Interestingly, ABA‐induced germination inhibition can be alleviated by exogenous glucose (Glc), mimicking a functional interplay between ABA and sugar ...
Xueyi Xue +3 more
wiley +1 more source