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怎样挑选缅玉(翡翠)饰品
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作者 李黎海 李季 《云南地质》 1998年第3期241-244,共4页
文章以缅玉手镯为例,通过六个方面较系统的阐述了在挑选缅玉饰品过程中应掌握的基本知识和方法,怎样识别缅玉饰品的优劣、真品和假冒产品。引导消费者在全面认识了解衡量品质的各项标准的基础上,买到称心如意缅玉饰品。
关键词 缅玉 硬玉 翡翠 瑕疵 缅玉饰品 挑选法
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Development of a 325 MHz β=0.12 superconducting single spoke cavity for China-ADS
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作者 李菡 戴建枰 +8 位作者 沙鹏 王群要 黄泓 李黎海 张娟 马强 林海英 孙毅 潘卫民 《Chinese Physics C》 SCIE CAS CSCD 2014年第7期130-134,共5页
Twelve very low Beta superconducting single spoke cavities, whose Beta is only 0.12 (Spoke012) when operating at 325 IvIHz, are adopted in Injector I for China-ADS linac. This type of spoke cavity is believed to be ... Twelve very low Beta superconducting single spoke cavities, whose Beta is only 0.12 (Spoke012) when operating at 325 IvIHz, are adopted in Injector I for China-ADS linac. This type of spoke cavity is believed to be one of tile key challenges for its very low geometric Beta. So far, in collaboration with Peking University and Harbin Institute of Technology, IHEP has successfully designed, fabricated, and tested the Spoke012 prototype cavity. This paper presents the details of the design, fabrication and test results for Spoke012 prototype cavity. 展开更多
关键词 low beta spoke cavity EM design mechanical design fabrication cold test
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