信道估计

建立水声信道的射线模型在工程应用上有重要的意义。射线声学是把声波的 传播看作是一束无数条垂直于等相位面的射线的传播，每一条射线与等相位面相 垂直，称为声线。声线途经的距离代表波传播的路程，声线经历的时问为波传播 的时间。声线束所携带的能量即为波传播的声能量。与几何光学相似，射线声学 的描述方法给人直观的感觉，在一定的条件下，射线声学的数学运算也比较简捷， 由射线理论给出的声线图可以给声场以直观、形象的理解。 本模型可以准确的衡量声波在海洋中传播路径(Establishing ray model of underwater acoustic channel is of great significance in engineering application. X-ray acoustics refers to sound waves. Propagation is regarded as the propagation of a bunch of innumerable rays perpendicular to the isophase plane, each ray being in phase with the isophase plane. Vertical, called sound line. The distance through which the sound line Travels represents the distance of the wave propagation, and the time that the sound line experiences is the wave propagation. The time. The energy carried by the sound beam is the sound energy of wave propagation. Like geometric optics, ray acoustics The descriptive method gives people an intuitive feeling. Under certain conditions, the mathematical operation of ray acoustics is relatively simple. The sonogram given by ray theory can give an intuitive and visual understanding of the sound field.Accurate measurement of sound wave propagation in the ocean)

matlab下的三相异步电机模型，可用于仿真

读取IGS电离层文件，格式为IONEX1.0（具体可参见CODE或IGS官方网站）(Reading IONEX1.0 )

GIS软件，动态图层，很好玩的，在上面放一部车，设置车的属性还有起点和终点，车就能动起来-GIS software, dynamic layers, is a lot of fun, in the above release a car, a provision also attributes the starting point and end point, cars will be able to move

五子棋源码，C语言，适合新学编程或者新学C的软件工程师(Gomoku source code, C language, software engineer for new learning programming or new learning C)

说明：  STM32获取测量角度传感器和温度，加速度各项值,(It can measure angle sensor, temperature and acceleration.)

说明：  毕业证书查询系统源代码，同时具有调试工具可以使用(Graduation Certificate Query System Source Code, with debugging tools can be used)

手机游戏：雷电的遗址，画面精彩，运行流畅！-mobile games : lightning sites, wonderful picture, running smooth!

画出频控阵和相控阵天线方向图，只要进行0和1输入，便可以选择相应的天线方向图(Drawing frequency diverse array and phased array antenna pattern)

龙格库塔四阶计算,时数值分析课中的重要的算法！(this is the longe-kutta 4 degree, an important math work for computer.)