This paper analyses the synchronous machine modeling by taken into account the machine parameters usually used in industry and those used in researcher’s domains. Two models are presented. The first one is developed in the (d,q) natural reference

反射系数与地震子波褶积合成地震记录，p，d，s分别是预设地层纵波速度、密度、及横波速度模型。其中包含可以改变主频的ricker子波，avopp是提取反射系数的程序。wigb可以对其中的多道进行强化显示。-Reflection coefficient and the convolution synthetic seismogram, the seismic wavelet p, d, s are preset formation p-wave velocity, density, and shea

计算岩石在三维应力作用下，其三维莫尔圆随三个方向应力改变而变化的情况-The program calculates the 3-D Mohr s circle variations under 3-D stress, in animation status.

大地电磁法是20世纪50年代由前苏联提出并经法、美加等过科学家年代由前苏联提出并经法、美加等过科学家过多年努力发展起来的以交变电磁场为源一种物探方法。本文是大地电磁一维正反演的原理和matlab代码。-Magnetotelluric method is put forward by the former Soviet union in the 1950 s and by the method, such as the us and Canada scientist s put forward b