ellipse

摘　要 文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。 简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。 介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。 JPEG标准的特点是离散余弦变换。 比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。 (Abstract Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results. Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method. JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding. JPEG standard is characterized by discrete )

使用abc坐标系统转换为dq0坐标系统元件实现abc坐标系统转换为dq0坐标系统。(This block performs the abcto dq0 transformation on a set of three-phase signals.)

Chuong trinh mo phong he thong truyen dan OFDM.

commonrailsystem高压共轨系统matlab/simulink仿真模型(common rail system )

this simulation code can detect teta for active filter

绘制Elfouhaily海浪谱，对于研究GNSS-R反演海面风速的很有帮助(Drawing the Elfouhaily wave spectrum is very helpful in studying GNSS-R inversion of sea surface wind speed.)

对回波信号的信号处理过程分为正交相检，固定杂波对消，MTD窄带滤波器组处理，相参积累和恒虚警处理(Signal processing of echo signals into quadrature-phase review process, the fixed clutter cancellation, MTD narrowband filter processing, coherent and CFAR)

自己编写MATLAB函数，实现对数字图像的缩放处理，采用双线性插值，可缩放彩色或灰度图像。 (Write your own MATLAB function to achieve the digital image scaling, bilinear interpolation, scalable color or grayscale images.)

《水和水蒸气性质表》，用matlab编的源程序，希望大家喜欢(" Water and Steam Properties Form" , using matlab source code, hope you like)

simulink vanet in matlab