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以二体问题为模型，从地球发射航天器探索火星，途中需经过一次无动力金星借力，寻找最优（总速度增量最小）的发射时间窗口和飞行时间，并绘制地球到金星的Pork-Chop发射能量等高线图。发射时间窗口为2023—2033年，总飞行时间不得大于2年。(Taking the two body problem as the model to explore Mars from the earth, it is necessary to seek an unpowered Venus transit force on the way to find the optimal time window and time of flight (the minimum total velocity increment), and draw the contour map of the Pork-Chop emission energy of the earth to Venus. The total launch time window is from 2023 to 2033, and the total flight time is not more than 2 years.)

Image treatment file:image filters and beginners commands ++

第9章 聚类分析的码源，有效进行科学数据的处理，有例子，测试效果好！！(Chapter 9 clustering analysis source code, valid scientific data processing, there are examples of test results is good! !)

说明：  这是一个基于matlab的三层神经网络算法，赋予不同的向量可对权值进行训练(This is a three-layer neural network matlab-based algorithm can give different weight vector for training)

偏微分方程的MATLAB解法 陆君安编著 PDF，讲的是matlab的pde工具箱(MATLAB Solution of Partial Differential Equations Jun-An Lu edited PDF, talking about the matlab pde toolbox)

this code is a matrix with 4 operation

星历数据读取文件，用来读取GPS获得的星历数据，以便计算。(Star calendar data reading files, to read the GPS get star calendar data, for the calculation.)

基于MUSIC算法的单频测角，即对来波的DOA到达角进行估计。(MUSIC algorithm based on single-frequency angle measurement, ie to the wave of DOA estimate the angle of arrival.)

使用matlab实现对空时分组码的协同分集系统进行性能仿真(Using matlab to realize synergies STBC diversity system performance simulation)

用超松弛迭代SOR求解线性方程组的matlab实例程序(a example program about solving linear equations with super- relaxation iterative )