PrelimReport

大功率分布式发电系统通常采用三相逆变器并网，由于三相逆变器系统参数耦合，传统方法设计的控制器算法复杂。在d。q坐标系下为双模式三相并网逆变器的独市和并网模式建立了数学模型．采用新的解耦方法，依据独立和并网模式控制系统超调量越小，模式切换过程中被控量的波动越小。切换过程就越平滑的原则。完成了两种模式的控制器设计，即分别应用积分环节、比例环节即可将独立模式和并网模式整定成典型的二阶系统，控制器设计简单．能取得优良的动、静态特性。仿真与实验验证了设计方法的正确性和可行性。(It is necessary to research on three—phase grid-connected inverter which a8 an important part of distributed generation．The parameters of three—phase inverter are coupling．The traditional design algorithm of the controller is complicated．The mathematicM models of stand—alone mode and grid—connected mode are established in d，q fhme． Based on the principle that the lower overshoot of the controller system，the smaller fluctuation of the controlled vailables， the smoother in transfer，controllers of two modes are designed separately，as integral and proportional regulators are separately added to stand-alone mode and g而d—connected mode．The controller has good dynamic and static char— acteristics．Simulation and experimental results varify the correctness and feasibility of the proposed method．)

DCT and Image Compression In the JPEG image compression algorithm, the input image is divided into 8-by-8 or 16-by-16 blocks, and the two-dimensional DCT is computed for each block. The DCT coefficients are then quantized, coded, and transmitted. The JPEG receiver (or JPEG file reader) decodes the quantized DCT coefficients, computes the inverse two-dimensional DCT of each block, and then puts the blocks back together into a single image. For typical images, many of the DCT coefficients have values close to zero these coefficients can be discarded without seriously affecting the quality of the reconstructed image. The example code below computes the two-dimensional DCT of 8-by-8 blocks in the input image, discards (sets to zero) all but 10 of the 64 DCT coefficients in each block, and then reconstructs the image using the two-dimensional inverse DCT of each block. The transform matrix computation method is used.

实现单相交流信号锁相功能，单相锁相环，matlab simulink程序。(matlab simulink single phase )

Generates a lognormally faded signal with multipaths (10) and multiple scattering (5)

森林火灾模拟MATLAB程序，很完整的代码！对火灾模拟感兴趣的可以下载参考参考！互相学习！(Very good！)

游程编码 输入一个一维数组，会将其内容进行编码，编码程序中包含十进制与二进制之间的相互转换。解码为其逆过程(RLE enter a one-dimensional array, its contents will be encoded, encoding process includes the interaction between decimal and binary conversion. Decode its reverse process)

灰色预测的程序，灰色预测是对不确定系统数据的预测(Gray prediction procedure, gray prediction is for uncertain system data)

denoise and wacelet analysis of signals

三相异步电机矢量控制调速，在matlab6.5下完成的(Vector control of three-phase induction motor speed control, completed in the next matlab6.5)

说明：  UWB_信道交织，包括符号交织，音频交织和循环移位(Channel UWB_ intertwined, including symbols intertwined, audio intertwined and cyclic shift)