Methods to compare the principles and calculation methods of cumulative incidence rate, incidence density, and risk factors adjusted incidence density.
方法比较医院感染累积发病率、发病密度和危险因素调整的发病密度的计算原理。
In this paper the principles and methods of mechanical calculation models for tunnel was judged by using directly the information of displacement measurement in monitoring of tunnel construction.
本文研究了直接利用隧道施工监测的位移量测信息来判别隧道力学计算模型的原理和方法。
The principles and methods of geometric programming are adopted to deal with the calculation of compositions of combustion products in MHD system.
本文应用几何规划理论和方法处理磁流体发电装置中燃烧产物组分的计算问题。
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