statcomm

matlab神经网络newff函数用来创建网络，为BP神经网络设置参数(newff is very important of BP.)

说明：  draw a signal with its envelope

任意输入年，月，日，通过输入日期查看它是该年的第几天(Any input year, month, day, it is the first few days)

matlab从入门到精通，想学matlab的朋友可以下载下来参考(matlab from entry to the proficient, want to learn matlab friends can download reference)

直接序列扩频DSSS， 跳频扩频FHSS， 码分多址CDMA编译码， 的实现(the realization of Direct Sequence Spread Spectrum DSSS, frequency hopping spread spectrum FHSS, Code Division Multiple Access CDMA codec, )

4) 创建一个名为Complex的类，进行复数的算术运算。复数的形式为： realpart+imaginarypart*i 用浮点变量表示类的private数据。提供构造函数，能够对所声明的该类对象进行初始化。在不提供初始化值的情况下，该构造函数应包含默认值。针对以下功能，分别提供一个public成员函数。 （1）两个复数相加； （2）两个复数相减 （3）用（a, b）的形式打印复数，其中a为实部，b为虚部。 (4) Create a class called Complex, and perform complex arithmetic operations. Plural form: realpart+imaginarypart* i said private data class with floating point variables. Provide a constructor, the object can be declared for the class is initialized. In the case do not provide initialization values, the constructor should contain default values. For the following functions, which provide a public member function. (A) two complex numbers (2) the subtraction of two complex (3) (a, b) in the form of plural printing, where a is the real part, b is the imaginary part.)

Image Processing using matlab

BP算法例子：用一个五层的神经网络去逼近函数(example_bpnetronetwork_5layers)

用卡尔曼滤波实现机动目标跟踪,并且给出了算法的详细说明(Kalman filter is used to track moving targets and gives a detailed description of the algorithm)

由一张图像提取圆形的边缘,得到离散的点来拟合椭圆,并简单的去除噪声,得到椭圆中心坐标.(Extracted by a picture rounded edges to fit the discrete points oval, and simply remove noise, get the coordinates of the center of the ellipse.)