高精度算法，精确到小数点后N位，是制作计算器的必备函数-High-precision algorithm, to the nearest N-bit, is to produce an essential function calculator

利用射线理论来计算全局地球模型的合成地震记录。更详细的介绍见英文描述。对于做波场模拟的同学很有参考价值。-Ray-theoretical approach to the calculation of synthetic seismograms in global Earth models. Authors: Vlastislav Cerveny, Jaromir Jansky General: Wave propagation Code level: Research

Finite Impulse Response C++ code, which contains four types of FIR filtering (LP, HP, BS, BB).