Results 101 to 110 of about 18,108 (135)

北京气象塔的振动分析及减振

, 1980
为了开展首都的大气污染研究而建造的北京气象塔,是我国最高的一座气象塔.此塔在建成后的两年内,经常发生振动,不仅影响到塔的使用寿命,而且影响到观测资料的准确性.因此有必要对气象塔的振动加以研究 ...
申仲翰, 王丹峰
core  

[Design and analysis of human arm pathological tremor simulation system]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
He Z, Liu H, Liu Q, Jiang Y, Zhu Z.
europepmc   +1 more source

[Suport scientific and technical innovation, and publish a world-class article to academic journal]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2021
Ren H.
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[Determination of perfluorinated compounds， antibiotics and pesticides in drinking water by automated solid phase extraction with ultra-performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Liang J, Feng J, Zeng D, Zhou L, Zhong X, Li Y, Chen D.   +6 more
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有限施工面积条件下配电线路杆塔紧凑型接地降阻方法研究

Dianci bileiqi
输配电线路防雷的重点均在于降低杆塔的接地电阻，但配电线路杆塔往往因距离居民生活区较近而缺少一定的接地施工面积，使得常规的杆塔降阻措施的应用受到了一定限制，并存在接地电阻不能达标等问题。首先利用有限元仿真计算软件COMSOL Multiphysics建立了配电线路杆塔桩基自然接地仿真模型，计算分析土壤电阻率、杆塔埋深等因素对桩基冲击散流特性的影响规律；然后针对现有同塔多回配电线路所面临的耐雷性能不佳与接地降阻可供施工面积不足等问题，提出基于柔性接地模块的杆塔紧凑型接地降阻策略 ...
刘伟, 安韵竹, 熊洁, 苏威, 王毅, 张流杰   +5 more
doaj  

[Rapid screening of 111 pesticides and veterinary drugs in livestock and poultry meat by ultra performance liquid chromatography-quadrupole-time of flight mass spectrometry]. [PDF]

Se Pu
Wang YM, Li XT, Chu K, Wang QQ, Wu S, Chen C.   +5 more
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[Determination of ergot alkaloids toxins in forage grass by ultra performance liquid chromatography-tandem mass spectrometry coupled with solid-phase supported liquid-liquid extraction]. [PDF]

Se Pu
Ren CX, Wang XM, Sheng WL, Han YZ, Zhang CY, Zheng SZ.   +5 more
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[Simultaneous screening of pesticides and mycotoxins in dried goji berries and mulberries by QuEChERS-liquid chromatography-quadrupole-time of flight mass spectrometry]. [PDF]

Se Pu
Yin H, Xie YJ, Shi MJ, Wu XQ, Tong KX, Chang QY, Fan CL, Chen H.   +7 more
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[Determination of glufosinate and its metabolite residues in tea by ultra-high performance liquid chromatography-tandem mass spectrometry coupled with precolumn derivatization]. [PDF]

Se Pu
Bi RF, Fu SH, Deng SC, Fu M, Zhang WW, Song YH.   +5 more
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[Role and mechanism of ubiquitin-specific protease 35 in ferroptosis of rheumatoid arthritis-fibroblast like synoviocytes]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Feng L, Hong L, Chen Y, Cai X.
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