Results 81 to 90 of about 13,279 (134)

[Brain-controlled unmanned aerial vehicle system based on meta brain computer interface open-source software platform]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li A, Mei J, Chen W, Tao L, Xu M, Ming D.   +5 more
europepmc   +1 more source

污秽绝缘子在交流下和在直流下闪络电压的差别

Dianci bileiqi, 1988
交流试验装置由250kVA,3·3/44kV的变压器,333kVA,10/0～3.65kV动线圈调压器和18μF谐波电容器组成。直流电源是桥式整流器。试验前试品用食盐进行污秽,然后放在雾室中。曾试验12只绝缘子试样,它们属于三种型式:针式、棒形支柱和用于电气铁道的合成绝缘子。列出了上述型式的绝缘子和绝缘子串的各种不同结构变形的闪络电压与污秽度的关系。直流电压的极性对放电过程的影响很小,这可用对称绝缘子状态来解释 ...
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[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao J, Ding Q, Li W, Ma Q, Lan Y, Zhang L, Han J.   +6 more
europepmc   +1 more source

[An unsupervised three-dimensional medical image registration method based on shifted window Transformer and convolutional neural network]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li Y, Ruan C, Ruan D.
europepmc   +1 more source

[Study on the electric field transmission characteristics of conducted-electrode tumor treating fields]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu K, Zhang J, Shi J, Fang H, Li X.
europepmc   +1 more source

[A coronary artery plaque segmentation method based on focal weighted accuracy loss function]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Xiong F, Lu H, Li L, Jiang R.
europepmc   +1 more source

[A motor imagery decoding study integrating differential attention with a multi-scale adaptive temporal convolutional network]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Dong Z, Bao X, Yang Y, Wu J.
europepmc   +1 more source

带波纹盖板的高效螺栓连接抗滑移系数影响因素试验研究

Jianzhu Gangjiegou Jinzhan
为提升高强度螺栓摩擦型连接的连接效率，本文提出了将硬金属波纹板与软金属进行组合的新型高效螺栓连接形式，通过接触面间的犁沟效应和黏着效应，可以显著提高螺栓连接的抗滑移系数。采用理论和试验相结合的研究方法，阐明了该种高效螺栓连接形式的作用机理及影响因素，设计并进行了27个抗滑移系数试验和4个表面硬度测试试验，探究了不同表面处理方式、不同孔型对螺栓连接抗滑移系数的影响，并与理论分析值进行对比。试验结果表明：硬金属和软金属的硬度比是影响高效螺栓连接抗滑移系数的重要因素，连接采用非标准孔将会降低抗滑移系数 ...
陈振明, 马琳, 高飞, 王综轶
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[Detection of neurofibroma combining radiomics and ensemble learning]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu Y, Wencheng D, Wang Y, Wang Y, Yan Y, Gan K, Pan T.   +6 more
europepmc   +1 more source

DJ—2型打击试验机简介

Gaoya dianqi, 1989
一、概述 打击试验是盘形悬式绝缘子的型式试验项目之一。国家标准GB1001-86《盘形悬式绝缘子技术条件》中对打击试验方法的要求是:试验时,将试品按正常使用情况安装于打击试验机上,沿试品轴向预先施加约8.9kN（908kgf）的拉伸负荷,然后将摆轴升高至规定的打击负荷值,并调节好摆轴和摆锤位置,即当释放摆锤使之自由落下,并打到绝缘子伞裙滴水缘上。
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