目的：探讨离心性静脉穿刺抽血法的临床实用性。方法：采用随机分组的方法，将受试者分为试验组、对照一组、对照二组，每组50例。试验组采......

解决了关于自然坐标系的混乱状况。弧坐标没有意义。s根本不是弧坐标，而是路程。一切质点在无穷小时间dt内均绕曲率中心作圆周运动......

文章主要探讨诺思洛普·弗莱构建文化批评的方式。他以文学为切入点进入文化批评，由词语的向心力和离心力形成的两极张力构成了......

南下中原是契丹辽朝统治前期的根本国策之一。辽太祖灵活机动地推行远交近攻策略，辽太宗尝试了混一天下的理想，辽世宗则试图继续前辈......

Presented in this manuscript are conventional electrical engineering tools to model the earth as a rotating electrical m......

By combing the mass energy equivalence formula, E=mc2, with the speed of light and gravity formula, , a new equation for......

In this paper, flux transfer events from the Sun to the Earth are represented as an electrical frequency. The Earth’s i......

By modeling the Sun as an electrical dynamo, the speed and frequency of the Sun’s electromagnetic field is determined. ......

目的探讨膝关节主动等速向心结合离心肌力训练对膝部骨性关节炎患者肌肉力量及膝关节性能的影响。方法选取2013年3月至2018年3月在......

The velocity of the Earth around the Sun and its corresponding mass are used in a standard centripetal force equation to......