随机生成飞机轨迹

为了感谢惠俊英老师的谆谆教诲，再为好奇诸君奉上水声物理--海洋传播声场模拟的一份武林秘籍--海洋传播声场抛物方程解算方法--RAM！ 当好奇诸君阅毕此卷，再对照轻松跑完作业，即入门 RAM！ RAM 与 AcousticsToolbox 遵照 GNU 公共许可证进行分发。感谢Michael D. Collins 对 RAM 的原创，也感谢由 Free Software 凝聚起来的自由科学家社区(In order to thank Professor Hui Junying for his teachings, and then offer you a secret book of underwater acoustic physics, ocean propagation sound field simulation, the parabolic equation solution method of ocean propagation sound field, RAM! When curious gentlemen read this volume, and then compared with easy running homework, that is, access to RAM! RAM and Acoustics Toolbox are distributed under the GNU Public License. Thanks to Michael D. Collins for his original RAM and to the Free Software community of free scientists.)

说明：  石崇老师编的PFC建立不规则边坡模型的代码(Code for establishing irregular slope model by PFC compiled by Shi Chong)

说明：  flac3d模型读取到tecplot软件的代码(Flac3d model reads the code of Tecplot software)

说明：  dq坐标系恒定直流源并网逆变器控制，PSCAD仿真软件(inverter in dq frame)

冲床应用行业检修使用的PLC程序，包含了工艺上的完整过程，其他冲床的程序也都是类似的(The PLC program used in the maintenance of punch application industry includes the complete process of technology, and other punch programs are similar.)

说明：  LSDYNA自定义本构模型文件, 很实用(LSDYNA User Defined Materials)

Abaqus 子程序，与VS，IVF联用， 用于判断模拟时工件的滑移，粘着(The Abaqus subroutine, combined with VS, IVF, is used to judge the slip and adhesion of the workpiece in the simulation.)

采用可变模式分解对一维时间信号进行分解，其性能优于传统EMD，LMD等方法(signal processing method)

说明：  读取segy地震数据，将其转化为matlab能够识别的数据(Read the segy seismic data and transform it into the data that MATLAB can identify)

基于Weber公式的齿轮啮合刚度计算公式(calculation of gear mesh stiffness based on Weber)