180420-画摩尔圆

说明：  2维装箱问题基于遗传算法求解二维装箱问题。。。。(2-D packing problem)

龙格库塔法求解常微分方程，matlab程序，解决速率方程的计算(Runge-Kutta method for solving ordinary differential equations, matlab program, to solve the calculation of the rate equation)

说明：  PLC Open编程手册，适合codesys平台(THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND MAY BE SUBJECT TO FUTURE ADDITIONS, MODIFICATIONS, OR CORRECTIONS. PLC OPEN HEREBY DISCLAIMS ALL WARRANTIES OR CONDITIONS OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES, OR CONDITIONS OF TITLE, NON-INFRINGEMENT,)

用红外控制步进电机转动角度，并且用LCD显示，采用51单片机控制，转速误差在1%之内(With infrared control stepper motor rotation angle, and with LCD display, using 51 single-chip microcomputer control, speed error is within 1%)

refprop9.1是一款用于制冷剂物性查询软件，可用于工质参数的调用(RefProp 9.1 is a refrigerant physical properties query software, which can be used to call refrigerant parameters.)

说明：  空间计量Elhorst的所有程序，已经加载了matlab的计量程序，可以通过修改读入文件的路径一次性成功。(All the procedures of spatial mathmetrics by Elhorst, which can be successfully operated once by modifying the path of reading files.)

FLAC3D软件生成球状模型的代码，采用fish语言(FLAC3D software generates the code of spherical model using fish language)

混沌工具箱，能很好的学习和了解混沌，包括绘制吸引子、分岔图、lyapunov指数等(Chaos toolbox can learn and understand chaos well, including drawing attractors, bifurcation graphs, Lyapunov exponents, etc.)

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

说明：  基于光电信号的的血氧饱和度计算，matlab的代码，请参考(Based on the photoelectric signal of blood oxygen saturation calculation, MATLAB code)