Results 31 to 40 of about 2,983,786 (142)
Dianci bileiqi, 1986 本文叙述了RXQ型电压互感器消谐器的保护原理。此消谐器既能消除中性点不接地系统中由电压互感器(PT)的非线性励磁特性所引起的过电压,又能抑制由弧光接地所引起的流过PT的过电流,进而防止了PT的烧毁。文中提出了与经典理论不同的谐振范围曲线,论证了消谐器的参数与技术要求,介绍了运行情况,并与国内数种消谐器作了有关比较。
1.西北电力试验研究所 +2 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Electrocatalytic CO2 reduction reaction (CO2RR) represents a pivotal pathway for the promotion of carbon neutrality and the preparation of highly valuable chemicals. To improve the product selectivity and catalytic efficiency of CO2RR, single‐atom catalysts (SACs) offering highly efficient atomic utilization rates and adjustable electronic ...
Xiaorui Liu +7 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT This study systematically investigates the creep behavior of an Al19Co21Fe20Ni40 eutectic high‐entropy alloy (EHEA) at 500°C, focusing on the synergistic effects of heterostructure design and trace boron doping. Thermomechanical processing was employed to produce a heterostructure consisting of alternating lamellar and equiaxed regions.
Xudong Liu +7 more
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Gongye shui chuli, 2002 在火力发电厂化学的生产和科研中, 为了改革旧工艺和试验新方法, 经常要做许多多因素试验。如何安排多因素试验, 是一个值得研究的问题。正交试验设计是研究和处理多因素试验的一种科学方法, 已在火力发电厂化学中获得了有效的应用。文中结合国内外的有关资料及作者在试验设计中的一点体会, 论述了正交试验设计的原理和方法, 以及其在电厂化学研究中应用的诸多方面, 并指出了目前应用中存在的不足和解决方法。
李建华, 潘娟琴
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International Journal of Applied Linguistics, Volume 36, Issue 4, Page 3183-3202, November 2026.ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
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, 2010 本发明公开了一种高速列车动模型试验系统，该试验系统包括列车动模型单元和空气炮驱动单元，列车动模型单元包括列车模型及其导轨，列车模型可在空气炮驱动单元驱动下沿其导轨滑动；空气炮驱动单元包括高压气体发生装置、炮管、运动部件，运动部件安装在炮管内，高压气体发生装置直接或通过管路与炮管后端相接，并通过向炮管内输入高压气体驱动运动部件运动，并通过运动部件带用炮管外的列车模型一同运动。利用本发明试验系统不仅可以进行隧道空气动力学研究 ...
李斌, 李进平, 陈宏
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Dianci bileiqi, 1984 1984年5月,我们利用在西德参加IECTC36、SC36B、SC36C的机会,参观了一个研究所和三个电瓷厂,现简介如下,以供同行参考.一、高压大容量输变电研究所（FGH）该研究所位于西德的Mannheim.它重点研究交直流输变电,有大电流试验室、高压试验室、电工试验室、绝缘子部 ...
蔡国材, 周义华
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Rationally selection of precursor additives during perovskite crystallization is essential for obtaining high‐quality films and achieving high‐performance perovskite solar cells (PSCs). However, the discovery and optimization of effective additives still rely heavily on time‐consuming and costly trial‐and‐error experiments.
Zhimin Feng +12 more
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, 1985 该项研究对柽柳属植物的种类、分布、引种、育苗及固沙造林技术进行了较为系统、全面的试验研究。（一）引种试验：到１９８４年底，引种总数达１５种，占该属植物全国总数８０％以上。所引各种，分别适应流沙、盐渍化沙地、农田防护林和防沙林的栽种。（二）育苗方面：采用“窄行密植扦插法”，提高了大田产苗量，达到国内较好水平。（三）造林技术：在风蚀光板地、平沙地、流动沙地、盐渍化沙地、砾石戈壁滩等不同立地类型进行了造林试验。（四）对该属植物的水分状况、茎叶形态解剖、花粉孢子形态以及染色体进行了研究 ...
中国科学院新疆生物土壤沙漠研究所
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