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[期刊论文] 作者:X.P.Feng,B.W.James, 来源:ChineseOpticsLetters 年份:2003
Penning type discharge was adopted to excite helium atoms. It is suitable for generating high density of metastables at a range from 0.1 mTorr to 0.5 Torr. The highest metastable density of 3.5 * 10^(10) cm^(-3) was observed at a static gas......
[期刊论文] 作者:冯贤平,B.W.James, 来源:黑龙江科技学院学报 年份:2003
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7...
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