QPSK

Matlab FFT 实现 时域频域转换

说明：  空间直角坐标转换，BURSA模型解算七参数(Transformation of space rectangular coordinate and solution of seven parameters with bursa model)

matlab程序，自动多阈值分割，本方法较好用适合，经本人亲自验证(matlab program, automatic multi-threshold segmentation, the method used for good, I personally verified by the)

Oil flow control software.

研究OFDM系统抗干扰技术，采用Matlab仿真环境，评价采用循环前缀(CP)和均衡技术的OFDM系统在多径环境和衰落信道条件下的误比特率、误帧率等性能指标。(Study on anti-jamming technology OFDM system using Matlab simulation environment to evaluate the use of cyclic prefix (CP) technology and balanced OFDM system in multipath fading channel environment and under the condition of bit error rate, frame rate, such as misuse of performance indicators.)

说明：  粒子群加连续潮流法，能优化变压器分接头，进行多变量优化，使系统非常稳定(PSO plus continuous power flow, transformer taps can be optimized, multi-variable optimization, making the system very stable)

用Matlab编程，实现解决该问题的单样本训练BP网络，设置一个停止迭代的误差Emin和最大迭代次数。在调试过程中，通过不断调整隐层节点数，学习率η，找到收敛速度快且误差小的一组参数。产生均匀分布在区间[-4，4]的测试样本，输入建立的模型得到输出，与Hermit多项式的期望输出进行比较计算总误差（运行5次，取平均值）(Using Matlab programming, to solve the problem of single sample training BP network, set a stop error iterations Emin and the maximum number of iterations. In the debugging process, by continuously adjusting the hidden layer nodes, learning rate η, fast convergence and find a set of parameters small errors. Produce a uniform distribution in the interval [4,4] of the test sample, the model has been established input output with the expected output Hermit polynomial calculated by comparing the total error (run 5 times the average))

Image stegnography USING DCT

matlab相关教程PPT，适用于MATLAB初学者。(matlab tutorials PPT, MATLAB for beginners.)

利用直角坐标的电力系统潮流计算 利用直角坐标的电力系统潮流计算(Cartesian coordinate system using the power flow calculation)