numerical repcipes in fortran

missile datcom user guide

说明：  可计算地下洞室的围岩稳定问题，模拟地下洞室的开挖、支护过程，介质可以是均质体，也可以是分区变化的非均质体，还可有夹层、节理等。(Calculate the stability of underground rock caverns, underground excavation simulation, supporting the process, the media can be a homogeneous body, you can also change the partition of non-homogeneous body, but also as a layer, joints and so on.)

说明：  利用Abaqus子程序UAMP实现PID控制。(PID control is implemented using the Abaqus subroutine UAMP.)

卫星精密定轨是一项非常复杂的任务，由于受到各种外在因素的影响，为了保持卫星在预定的轨道运行，必须进行轨道机动调整，程序主要为卫星机动模块，采用fortran语言编写。

This is 1D, 2D, 3D earth quake ray tomography forward and inverse procedures

damage and failure in unidirectional fiber composite materials

说明：  利用ABAQUS显示算法，引入损失断裂准则，计算金属断裂行为(Using ABAQUS display algorithm, the loss fracture criterion is introduced to calculate metal fracture behavior)

《数值模拟方法和运动界面追踪》VOF方法源代码(" Numerical simulation interface and motion tracking" VOF method source code)

说明：  常见有限差分格式构造，并有fortran代码实现，适合cfd学习(Common finite difference format construction, and FORTRAN code implementation, suitable for CFD learning)

线性相关 求逐月异常序列x(n,12)和y(n,12)(n是年)相同月份之间的滞后超前nt年的相关系数rt(-nt:nt,12)，其中nt最大的滞后或超前时间（单位：年）。 (Linearly related to demand monthly abnormal sequence x (n, 12) and y (n, 12) (n is the year) ahead of the same month lag between the years of the correlation coefficient nt rt (-nt: nt, 12), in which nt the largest lag or lead time (unit: years).)