This is a guest post written by fellow PBN blogger Scott H. Young, who writes about creating habits, achieving goals, being productive, and other good stuff on his blog.

这是PBN网站的博主斯科特·h·扬写的一篇特约文稿，他博客中的文章包括习惯的养成、目标的实现、效率的提高和一些其他内容。

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A kinematics model by post D-H method for 4R-robot was offered in this paper, which derived the manipulator finger position and its attitude with unit vectors of direction cosine.

采用D-H后置法建立了4R机器人运动方程，建立机器人执行机构在空间相对位置关系的数学模型，由此可解出手部位置和用单位矢量方向余弦表示的姿态。

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Results:On post operative check the renal pelvis obviously lessened in the 48 A H pyeloplasty cases, the renal function improved, and the peristalsis at the UPJ was fine on the screen.

结果：48侧A- H肾盂成形术病人术后复查肾盂明显缩小，肾功能改善，电视动态观察UPJ处蠕动良好。

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No deliberations over a Hurd or an Apotheker can mean much when the board is content to let a company like H-P lurch from pillar to post in hopes of quick revenue injections to stave off inevitable market share erosions.

FORBES: H-P: Is There a Miraculous Recovery Ahead?

H. (pop. 2, 600) looks more like a frontier post in Alaska than a town in New England.

FORBES: Local heroes

Koop, who turned his once-obscure post into a bully pulpit for seven years during the Reagan and George H.

WSJ: Koop, who transformed surgeon general post, dies