本文依据流体力学的基本原理和电路中网络理论提出一种新的通风系统计算方法——网络矩阵法。

According to the basic principles of hydromechanics and the electrical network theory, a new method named network matrix approach is presented in this paper to calculate ventilation system.

youdao

本文运用流体力学的基本原理，对气吹式排种器的工作情况进行了分析。

In this paper the general working principles of pneumatic seed-metering device was analysed by tne principle of fluid mechanics.

youdao

根据流体力学和多孔介质渗流力学的基本原理，建立实验模型，结合一些数学方法，推导出煤层注水时间的解析解。

According to the basic principle of hydrodynamics and the seepage mechanics with pores, the experimental model is established and the analytic solution about the topping up time is deduced.

youdao