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图像分割方法水平集中的代码,在MATLAB环境中使用。(level set image segmentation)

基于遗传算法与粒子群算法的相机标定程序，值得借鉴(The camera calibration program based on genetic algorithm and particle swarm optimization is worthy of reference)

说明：  期权定价模型与数值方法 BS公式隐含波动率计算(Option pricing model and numerical method Calculation of Implicit Volatility of BS Formula)

说明：  经典leach算法，和PSO算法，有想法的同学可以融合在一起，便于对比仿真。亲测有效(Classic LEACH algorithm, PSO algorithm, students with ideas can be fused together, easy to compare simulation. Pro test is effective)

这个代码描述了人类视觉系统的几个特性，希望能够对大家有帮助，共同进步！(This code described several characteristics of human visual system, the hope can to help, make progress together!)

说明：  对ask fsk用matlab写出 并有图像(that is a good thing)

说明：  利用Matlab编写求取4级移位寄存器的M序列 设初始序列为:1 1 1 1 通过一个四级的移位寄存器,其中在第三级有负反馈(一个模二加法),即将序列的第三位和第四位相加(如序列1 1 1 1经移位寄存器第一次移位后为0 1 1 1)的值再赋到第一位. 序列的周期为16.(The use of Matlab to prepare to strike four of the M shift register sequence based initial sequence as follows: 1 1 1 1 4 through a shift register, which in the third grade there is negative feedback (one-mode two adder), the upcoming series third and fourth combined (such as the sequence 1 1 1 1 by the shift register after the first shift for the 0 1 1 1) the value given to the first again. The cycle sequence was 16.)

合成孔径雷达sar成像源代码 距离多普勒算法(Sar synthetic aperture radar imaging algorithm source code from the Doppler)

在采样点之间的频率响应是由各采样点的加权内插函数叠加而形成的，因而有一定的逼近误差。该误差大小取决于理想频率响应的形状，理想频响特性变化越平缓，内插值越接近理想值，逼近误差越小；反之，如果采样点之间的理想频响特性变化越陡，则内插值与理想值之间的误差越大，因而在理想滤波器不连续点的两边，就会产生尖峰，而在通带和阻带就会产生波纹。用频率采样法设计的实际滤波器频率响应如图1所示。由图1可知，实际滤波器的阻带衰减取决于内插函数第一旁瓣幅度值的大小，其大小决定了所设计的滤波器的阻带性能。(Interpolation function superimposed between sampling points of the frequency response is weighted within each sampling point and the formation of, and thus have a certain degree of approximation error. The size of this error depends on the shape of the ideal frequency response and the ideal frequency response characteristic change is more gentle, interpolated and more close to the ideal value, the smaller the approximation errors Conversely, if the sampling point between the ideal frequency response characteristics of the steeper the change, and then the interpolated the larger the error between the ideal value, and thus in the ideal filter both sides of the discontinuity point, will produce spikes occurs ripple in the passband and stopband. Actual design frequency sampling filter frequency response is shown in Figure 1. Figure 1 shows, the actual filter stopband attenuation depending on the interpolation value of the size of the first side-lobe amplitude of the function that determin)

this program is for binary shift keying.