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求N个字符的不重复排列数，不是标准的递归写法，供求职时笔试参考。(Seek N-character array of non-repetition number, not an ordinary recursive formulation for the job when the written reference.)

HCS300编码。。还要最少20个字？够了吧？？(HCS300 code. . But also at least 20 words? Enough, right? ?)

matlab 导入大文件工具，可以自动生成代码(matlab import large files tool that can automatically generate code)

John D. Anderson《计算流体力学基础及其应用》 第9章：二维不可压库埃特流的数值解。自己编写的Matlab源代码。(John D. Anderson " Computational Fluid Dynamics basis of its application" Chapter 9: two-dimensional numerical solution of incompressible Couette flow. I have written Matlab source code.)

潮流调和分析非常好用的一款程序，可进行潮流调和常数的计算(Tide harmonic analysis, a very easy to use procedures, harmonic currents can be constant calculation)

可以读取obj格式的文件到matlab空间中，obj格式的文件中，只能包含点和面的信息(Obj file format can be read into matlab space, obj file format, can contain only the information points and surfaces)

说明：  IIR 数字滤波器的MATLAB仿真实现(MATLAB Simulation of IIR Digital Filter Implementation)

说明：  四旋翼飞行器模拟仿真，可以调整预定轨迹，无人机六自由度仿真代码(Four - rotor aircraft simulation,can adjust the predetermined trajectory,Uav six degrees of freedom simulation code)

Flow Job Shop problem using genetic algorithm use g++ compiler

This InstructionVisitor executes the instructions that it visits on a given local variable frame and stack.