And discusses the reason and improvement way of inefficient funds through the efficiency analysis and the differentialvariable analysis;
并通过效率分析和差额变数分析，探讨基金无效率的原因及优化目标；
2
This paper presents the performance of new model monkey winch for mine. and its design calculation of the planetary differentialvariable-speed drive device.
介绍了一种新型矿用小绞车的性能及其行星差速变速传动装置的设计计算。
3
Design of these controllers combines the differential geometry theory with the variable structure control theory.