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概述了现阶段建筑抗震设计方法,并介绍了底部剪力法、振型分解反应谱法、时程分析法的概念,主要计算方法和计算步骤。供建筑结构设计人员参考。 相似文献
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This paper discusses fabrication and performance of novel circular spiral inductors on silicon. The substrate materials underneath the inductor coil are removed by wet etching process. In the fabrication process, fine polishing of the photoresist is used to simplify the processes and ensure perfect contact between the seed layer and the top of pillars. Dry etching technique is used to remove the seed layer. The results show that Q-factor of the inductor is greatly improved by removing silicon underneath the inductor coil. The spiral inductor with line width of 50 μm has a peak Q-factor of 10 for the inductance of 2.5 nH at frequency of 1 GHz, and the resonance frequency of the inductor is about 8.5 GHz. For the inductor of conductor width 80 μm, the peak Q-factor increases to about 17 for inductance of 1.5 nH in the frequency range of 0.05 -3.00 GHz. 相似文献
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中国科学院昆明分院是中国科学院的派出机构,代院管理中国科学院在云南的科研单位.它们是:云南天文台,昆明植物研究所(西双版纳热带植物园),昆明动物研究所,昆明生态研究所.昆明分院的前身为中国科学院昆明办事处,始建于1957年.1958年扩建为云南分院,下辖的研究所包括物理、天文、化学、植物、动物、贵金属、地质、冶金等学科.1962年云南分院撤 相似文献
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