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产程中徒手指转位法——减少头位性难产
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《适宜诊疗技术》 1999年第1期28-28,共1页
本法是使用于产程中及时纠正异常胎头位置,减少头位性难产的一种实用技术,其技术要点介绍如下:
关键词 产程 徒手指转位 头位性难产 转位方法 转位时机
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Realization of Tip Tilting By 8-Step Line Tilting
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作者 CHEN Ying-Tian ZHANG Yang +3 位作者 HU Sen HO Tso-Hsiu Boon Ham Lim Chen Sin Lim 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第9期549-554,共6页
By direct calculation of rotation matrices of SO(3),we show how certain specific sequence of eight consecutiverotations of digital angles can yield a tilting of a facet mirror.We also design a detailed program specifi... By direct calculation of rotation matrices of SO(3),we show how certain specific sequence of eight consecutiverotations of digital angles can yield a tilting of a facet mirror.We also design a detailed program specifically to tiltan array of mirrors from planar orientation to the required focusing orientation.We describe how to use the 8-step torealize the focusing of the mirror array.We have found,in our designed program,an important feature of row-sharingduring the rotations for the columns and similarly the column-sharing during the rotations for the row.This feature cansave a lot of operating time during the actual realization of the mechanical movements. 展开更多
关键词 rotational group solar energy optical device tip tilting line tilting
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