The underground hydrodynamic force function research technique may summarize is mathematics analogue method, the value analogue method and the experimental analogy method.
地下水动力作用的研究方法可概括为数学模拟法、数值模拟法和实验模拟法。
2
By comparison with analogue AC servo system, some remarkable features of digital AC servo system, such op programming function, system stability and system performance are described.