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	Estimation of groundwater levels with vertical electrical sounding in the semiarid area of South Keerqin sandy aquifer, China 期刊论文 OAI收割 JOURNAL OF APPLIED GEOPHYSICS, 2012, 页码: 11-18 作者: Song, Lining; Zhu, Jiaojun; Yan, Qiaoling; Kang, Hongzhang 收藏 \| 浏览/下载：24/0 \| 提交时间：2017/05/15 Grounwater Soil electrical resistivity Manual measurement Wenner array Sandy aquifers
	Estimation of groundwater levels with vertical electrical sounding in the semiarid area of South Keerqin sandy aquifer, China 期刊论文 OAI收割 JOURNAL OF APPLIED GEOPHYSICS, 2012, 页码: 11-18 作者: Song, Lining; Zhu, Jiaojun; Yan, Qiaoling; Kang, Hongzhang 收藏 \| 浏览/下载：20/0 \| 提交时间：2017/05/15 Grounwater Soil electrical resistivity Manual measurement Wenner array Sandy aquifers
	The research of rigid lapping technique on diamond grating ruling tool (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Materials Science and Engineering Science, ICMSES 2010, December 11, 2010 - December 12, 2010, Shenzhen, China Jirigalantu A.; Bayanheshig; Dong Q. X. 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/03/25 One of the effective method of improving diamond tool life on rulling large diffraction gratings is developing precise double-cone edged on line edge transfering tool. But traditional died weight or manual lapping technique couldn't meet the precision requirement of on line edge transfering tool. So preliminary studied rigid lapping of diamond grating ruling tool. Choosing traditional BC6063 shaping machine and made a series of alteration on it achieved the automation of lapping process of diamond grating ruling tool. Through lapping grating ruling tool and AFM measurement find that the surface roughness of tool is 1.51nm the radius of tool edge is 160nm edge quality is good enough this verified the feasibility of rigid lapping of diamond grating ruling tool and lay the foundation for developing precision lapping machine. (2011) Trans Tech Publications Switzerland.