EFFICIENCY ANALYSIS OF DOUBLE CRANK RING-PLATE-TYPE PIN-CYCLOIDAL GEAR PLANETARY DRIVE

From the general formula for calculating the efficiency of planetary geartrains, the efficiency of the double crank ring-plate-type pin-cycloidal gear planetary drive isderived. To prove the theory, an experimental study has been conducted. The tested value of theefficiency of a sample set of the new-type drive in the experiment agrees with the calculated one.It shows that the new-type drive is of not merely high bearing capacity, but also quite highefficiency.

规范咨询和追访对青年未育流产女性落实LARC避孕方法的作用

目的探讨在计划生育门诊实施规范咨询和追访对青年未育流产女性采用LARC避孕方式的影响。方法本院计划生育门诊自2018年6月开始开展青年未育流产女性规范咨询和追访。纳入2018年1月至2018年10月来本院要求终止妊娠的100例未育青年女性作为研究对象。将开展规范咨询和追访前要求流产的未育女性设为对照组,将开展规范咨询和追访后要求流产的未育女性设为观察组,对两组女性进行为期12个月的追访,比较两组规范咨询前、追访结束后的避孕知识认知度、流产后避孕方式的选择情况。结果观察组女性规范咨询前的避孕知识认知度评分比较差异无统计学意义(t=0.281,P>0.05),追访结束时的避孕知识认知度评分为(82.11±5.02)分,高于对照组女性的(76.20±4.90)分(t=5.955,P<0.05),观察组女性的LARC避孕方法采用率为29.41%,高于对照组女性的20.41%(x^2=5.542,P<0.05)。结论对青年未育流产女性实施规范咨询和追访,能够有效加强青年未育流产女性对避孕知识的掌握,提高青年未育流产女性LARC避孕方法落实率。