ofdm 频谱

水声射线反演，bellhop模型，水声信道matlab模型，还有说明书(Underwater acoustic ray inversion, bellhop model)

说明：  针对排列熵算法做出的改进，广义相位排列熵，通过调整参数，有效提升了排列熵算法的性能。(Aiming at the improvement of permutation entropy algorithm, generalized phase permutation entropy improves the performance of permutation entropy algorithm by adjusting parameters)

在线识别系统模型 自适应控制 先进PID控制与matlab仿真(Advanced PID Control and MATLAB Simulation of Online Identification System Model Adaptive Control)

C和C++程序员面试秘笈，解析C/C++面试题的书，可以帮助求职者更好地准备面试(C and C++ programmer interview tips, analytical C/C++ face questions of the book, can help candidates better prepare for interview)

Given N rational numbers in the form "numerator/denominator", you are supposed to calculate their sum. 输入描述: Each input file contains one test case. Each case starts with a positive integer N (<=100), followed in the next line N rational numbers "a1/b1 a2/b2 ..." where all the numerators and denominators are in the range of "long int". If there is a negative number, then the sign must appear in front of the numerator. 输出描述: For each test case, output the sum in the simplest form "integer numerator/denominator" where "integer" is the integer part of the sum, "numerator" < "denominator", and the numerator and the denominator have no common factor. You must output only the fractional part if the integer part is 0.(Input Description: Each input file contains one test case. Each case starts with a positive integer N (<=100), followed in the next line N rational numbers "a1/b1 a2/b2 ..." where all the numerators and denominators are in the range of "long int". If there is a negative number, then the sign must appear in front of the numerator. Output Description: For each test case, output the sum in the simplest form "integer numerator/denominator" where "integer" is the integer part of the sum, "numerator" < "denominator", and the numerator and the denominator have no common factor. You must output only the fractional part if the integer part is 0.)

继承、多继承、虚继承的使用！ 如果要想使一个公共基类在派生类中只产生一个基类子对象，则必须将这个基类设定为虚基类。-inheritance, multiple inheritance, the use of virtual inheritance! If we want to make a public base class in the derived class only have a base class Object son, they would have to set the base class for virtual base class.

VISUAL C++游戏编程里有详细的课件和源码(VISUAL C++ Game programming, there are detailed courseware and source)

动态计算网络最长最短路线-dynamic computing network longest shortest route

潜水器上浮模拟，对上浮中的速度、能耗和时间进行分析(Floating simulation of submersible)

MSB和LSB知识分析，了解MSB和LSB知识(Knowledge of MSB and LSB, MSB and LSB knowledge to understand)