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以“氦质谱细检漏的基本判据和最长候检时间”为基础,分析了密封电子元器件内部水汽不超过5 000 ppm的可靠贮存寿命,确定了细漏检测的严密等级THemin分级,界定和拓展了适用内腔容积并进行了分段,设计了压氦法和预充氦法的固定方案,验证了固定方案规定的最长候检时间可以满足去除吸附氦的要求.从而突破了国内外相关标准改进中难以或无法实施的技术瓶颈,为加严密封性判据改进相关标准,提供了可行的技术方案. 相似文献
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On the announcement of the awarding of the Pritzker Prize to the first Chinese architect, Wang Shu, in May 2012, jury chair Lord Palumbo commended him for an architecture that is ‘timeless, deeply rooted in its context and yet universal’. Visiting Wang and his work in the ancient city of Hangzhou in Eastern China, shortly afterwards Edward Denison and Guang Yu Ren sought to understand why Wang might have succeeded where other architects have failed in a Chinese and international context, forging an innovative approach to architecture, which is in tune with tradition while being of a ‘genuine and often sublime originality’. 相似文献
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