A direct numerical method for the stability of multidegree-of-freedom systems with period parameters was proposed.
提出多自由度周期参激系统稳定性的数值直接法。
Methods Contacting subjects directly on the working sites of street-based FSW or with the help of street-based FSW volunteers who identified male clients at first,and applied indirect pision methods to estimate the size of male clients of street-based FSW.
方法通过街头暗娼志愿者识别,在街头暗娼站桩点主动接近调查对象,运用间接除数法估计街头性服务嫖客规模。