Image Feature Extraction of Source code

主要讲matlab在数学建模中的作用，实例有电阻问题，给药方案问题等。(Matlab main stresses in the role of mathematical modeling, examples of problem there is resistance, administration of the program and so on.)

Codes for biometric systems performence uation

通过典型的图像操作来学习对数据绘图后的图像修改，以达到更加完美的效果(Through typical image manipulation to learn the image modification after data drawing, in order to achieve a more perfect effect)

说明：  QPSK的MATLAB实现包括发送数据、QPSK比特映射、成型滤波、载波调制、载波解调、收成型匹配、IQ抽样判决、接收比特数据恢复8个模块(The MATLAB implementation of QPSK includes eight modules: sending data, QPSK bit mapping, shaping filtering, carrier modulation, carrier demodulation, shaping matching, IQ sampling decision and receiving bit data recovery.)

实现信号处理中QAM调制、过信道、解调部分。其中QAM调制部分可改符号点数，M阶数，信道加高斯白噪声、时延、多径，调制解调均有星座图。通过本代码，可学习QAM调制解调，或者通信系统的知识。(To achieve QAM modulation, signal processing over channel, a demodulation section. QAM modulation section can be changed symbolic points M order channel additive white Gaussian noise, delay, multipath, the modem has constellation diagram. QAM modulation and demodulation, or communication system knowledge through this code, you can learn.)

一种基于DCT域盲数字水印嵌入程序，在DCT中频系数中嵌入水印，恢复時不用用到原始图像。(Based on DCT-domain blind digital watermark embedding process, in the intermediate frequency DCT coefficients to embed watermarks, when not used to restore the original image.)

performance improvement with different codes

说明：  利用PQ分解法进行电网潮流计算，得出待求解电网的各PQ节点的有功功率和无功功率，各PV节点的有功功率和节点电压(Make use of power flow PQ decomposition method calculated the PQ to be solved for each grid node of active and reactive power, active power and node voltage of each PV nodes.)

异步电机调速系统，参考模型神经网络控制器的感应电机转速(Induction motor speed control system, neural network reference model of induction motor speed controller)

利用cosin余弦距离量化不同数据集间相似性测度的matlab函数(quantize the similarity between data sets using cosin distance)