Results 41 to 50 of about 920,028 (168)
, 1986 开关、断路器中的电弧研究与等离子体化学是低温等离子体两个通常的应用领域。开断器中电弧物理过程的研究结果可应用于回路开断、限止过失电流及脉冲功率系统中。脉冲功率技术可应用于原子能聚变发电及其模拟。随着电力系统的容量不断增加 ...
顾琅
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World Water Policy, Volume 11, Issue 4, Page 1048-1064, November 2025.ABSTRACT Groundwater governance is complex due to several externalities associated with groundwater being an invisible natural resource tied to the land with millions of extractors and limited means of exclusion. The paper traces the evolution of groundwater irrigation in India and the corresponding change in groundwater laws and policies to address ...
Anindita Sarkar, Amrita Sarkar
wiley +1 more source
Gaoya dianqi, 1982 《高压电器》一书的基本内容为:电力系统的开断与关合过程;各种高压断路器（油断路器、压缩空气断路器、SF6断路器、真空断路器）的结构、工作原理、性能分析及部分设计的计算;其他高压电器（熔断器、隔离开关、接地开关、负荷开关、互感器、组合电器等）的介绍 ...
刘绍峻
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Integrative Conservation, Volume 4, Issue 3, Page 277-286, September 2025.This study provides an innovation to address the challenge in accessibility to samples and genetic markers in Snow leopard conservation genetic studies. We performed next‐generation sequencing (NGS) on 19 fecal samples obtained from the eastern Qinghai‐Tibet Plateau, and successfully assembled 17 complete mitogenome sequences (~16,720 bp) and ...
Chen Cheng +7 more
wiley +1 more source
Gaoya dianqi, 2018 基于半桥子模块拓扑的模块化多电平电压源换流器（HBSM-MMC）和直流断路器构建的柔性直流电网能够实现大规模新能源的并网和消纳,发展前景良好。柔性直流电网技术的发展主要限制于高压直流断路器,因此对高压直流断路器开断过程以及开断能力影响因素的研究十分有必要。文中首先研究了适用于HBSM-MMC柔性直流电网的模块化混合型高压直流断路器运行原理;并在此基础上详细分析了模块化混合型直流断路器开断时间的影响因素;然后研究了直流断路器过电压的影响因素;最后在PSCAD ...
张军, 吴金龙, 王先为, 姚为正
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Detection of canine external ear canal lesions using artificial intelligence
Veterinary Dermatology, Volume 36, Issue 4, Page 424-432, August 2025.Background – Early and accurate diagnosis of otitis externa is crucial for correct management yet often can be challenging. Artificial intelligence (AI) is a valuable diagnostic tool in human medicine. Currently, no such tool is available in veterinary dermatology/otology.
Neoklis Apostolopoulos +3 more
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, 2010 在断裂力学基础上建立起来的材料抵抗裂纹扩展断裂的韧性性能称为断裂韧性。断裂韧 性与其它韧性性能一样，综合反映了材料的强度和塑性，在防止低应力脆断选用材料时，
中国科学院老科技工作者协会工程力学分会
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, 2007 采用简化的deWit替代系列法研究了盆栽冬小麦‘长武135’(Triticum aestivum cv.Changwu135)在拔节初期断根对冬小麦根冠关系、竞争能力及其与产量性状的关系。无论干旱或湿润,单栽条件下断根降低了小麦的根冠比,在混栽条件下,断根小麦的相对穗重和相对地上部生物量均显著低于未断根小麦,说明断根降低了小麦的竞争能力。根冠比越大竞争能力越强,即作物的竞争能力与根冠比存在正相关关系。单栽湿润条件,断根降低了小麦的穗重和籽粒产量,而在中等干旱条件下 ...
李凤民 +3 more
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Gaoya dianqi, 1973 作者回顾了十年来超高压网内短路电流显著的增长速度,阐明了制造厂所采取的提高空气断路器开断能力的各种方法;论述了用来鉴定目前和将来在电力网内使用的断路器开断能力的各种试验方法。目前,电力网中,短路电流已经高达100千安左右。
钱铭金
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