Gaoya dianqi, 2017 文中介绍一种新型全固态组合式陆地电火花震源。该陆地电火花震源由4台子震源组成。每台子震源采用半导体器件可控硅代替传统的三电极气体开关做放电开关,利用限流电感控制放电电流的峰值和上升时间,采用续流二极管抑制反向振荡的放电电流。通过改变放电电流波形,可以适当地改变电声转换的频谱特性。电声换能器采用的是同轴平行式电弧放电电极结构。每台子震源工作电压7 500 V时,储能为28 k J,总震源储能为112 k J。4台子震源可以同步放电或延迟放电。在河北衡水武强县进行了一次野外实验 ...
徐旭哲 +4 more
doaj
Gaoya dianqi, 2002 伪火花放电开关的触发技术是伪火花开关研究中的一项重要内容。因为触发方案的选择不仅关系到开关放电室的设计,而且对开关的工作电压范围,工作频率和使用寿命有很大影响。伪火花开关及其触发设计的最主要特征在于它的空心阴极结构,空心阴极的存在既是伪火花间隙放电的先决条件,又为开关的触发单元提供必要的空间和可靠的保护屏障,使得触发部件不受主放电等离子体电流的冲击和烧蚀。笔者提出了伪火花开关触发设计的技术要求,总结了现有伪火花放电开关的触发方法,并对它们的触发效果进行了比较,重点介绍了脉冲辉光放电（脉冲空心阴极 ...
谢建民, 邱毓昌, 姜惟, 曾建成
doaj
Research progress in the prevention and treatment of insomnia with classical prescriptions. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Shi X, Chen L, Li W, Wang R.
europepmc +1 more source
Dianci bileiqi针对山岩等高土壤电阻率地区输电线路杆塔接地施工不便、降阻技术经济效益差的问题，本研究提出一种含垂直接地装置的立体式输电杆塔接地方法。该方法利用现阶段大力推广的输电杆塔基础机械化施工技术，在杆塔基础施工的同时在接地射线的固定点位植入一定长度的接地锚栓，构成垂直接地装置，起到降阻增效的作用。文中首先给出含垂直接地装置的立体式输电杆塔接地装置的模型，并研究了考虑火花放电效应时输电杆塔接地装置冲击接地电阻数值计算方法。然后分析了土壤水平分层结构对该立体式输电杆塔接地装置冲击降阻效果的影响 ...
朱子茵 +5 more
doaj
XuanHuGPT: parameter-efficient fine-tuning of large language model in the field of traditional Chinese medicine. [PDF]
Chin MedTong X +9 more
europepmc +1 more source
[<i>Ching Shum</i> Pills alleviates non-alcoholic fatty liver disease in mice by ameliorating lipid metabolism disorders]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLuo B +7 more
europepmc +1 more source
[Determination of squalene and oxidized squalene in edible oil by gas chromatography-tandem mass spectrometry and evaluation of the thermal stability of squalene]. [PDF]
Se PuXiao GP, Liao DD, Li GS, Luo X, Yuan L.
europepmc +1 more source
[<i>Sangma Zhike</i> Formula alleviates airway inflammation and hyperresponsiveness in rats with postinfectious cough by inhibiting the TRPV1-SP/CGRP and pyroptosis pathways]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoYang Q +7 more
europepmc +1 more source
[Mechanism of Cnidii Fructus in the treatment of periodontitis with osteoporosis based on network pharmacology, molecular docking, and molecular dynamics simulation]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiFeng M, Xu X, Li N, Yang M, Zhai Y.
europepmc +1 more source
[Effects of acellular allogeneic dermis combined with autologous split-thickness skin grafts in repairing deep burn wounds in head, face, neck, and torso in children]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiZhang JL +5 more
europepmc +1 more source