work2_3

typedef int ElemType: stuct LNode{ ElemType data LNode*next }

OFDM系统在频率选择性衰落信道下误码率特性。(OFDM systems in frequency selective fading channel bit error rate performance under)

该程序利用MATLAB仿真画出了了DSB信号的循环谱，程序中添加了解释，方便理解和阅读。(The program utilizes MATLAB simulation depicts the cyclic spectrum DSB signal, the program has been added to explain, easy to understand and read.)

Matlab科学计算的源代码，非常全，所有的代码都自己亲手跑一边，保证你不会为工程数学问题发愁，赶紧行动吧(Matlab scientific computing source code, very full, all the code yourself running while the guarantee that you will not engineering mathematical problems to worry about, and quickly action)

因子分析是指研究从变量群中提取共性因子的统计技术。最早由英国心理学家C.E.斯皮尔曼提出。因子分析可在许多变量中找出隐藏的具有代表性的因子。将相同本质的变量归入一个因子，可减少变量的数目，还可检验变量间关系的假设。(Factor analysis is the study of common factors extracted from the variable group statistical techniques. First proposed by British psychologist CE Spearman. Factor analysis can identify a representative factor to hide many variables. Will be essentially the same variables into one factor, can reduce the number of variables, but also test the hypothesis that the relationship between variables.)

用matlab编的数字信号处理实验，IIR数字滤波器设计，并且还是写好的报告，希望有帮助(With a series of digital signal processing matlab experiment, IIR digital filter design, and or written report, want to help)

单负介质中matlab波导导模曲线单负介质中matlab波导导模曲线(Matlab single negative media guide curves of guided modes )

研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散 余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的 K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角 阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这 反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特 性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。 虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。 (Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect. Although from related to the performance of the sense, DCT is a kind o)

研究生上的汽车动力学作业，汽车动力学仿真，四分之一车辆simulink模型(Graduate work on vehicle dynamics, vehicle dynamics simulation, simulink quarter vehicle model)

说明：  可以将信号很好的进行LMD分解，很好用，自己试试看(The signal can be well decomposed into LMD)