DCT

平面波展开法计算正方形结构光子晶体的带隙的程序，二维，平面(Plane wave expansion method to calculate the square of the structure of photonic crystal band-gap procedure, two-dimensional, planar)

幂法是一种计算矩阵主特征值（矩阵按模最大的特征值）及对应特征向量的迭代方法，特别适用于大型稀疏矩阵。 但是，一般幂法迭代向量v的各个不等于零的分量将随k 趋向于无穷大而使计算机溢出。因此，我们必须对某通幕法进行规范。即规范化幂法 (Power Method is a calculation of the main eigenvalue matrix (matrix according to the largest eigenvalue modulus) and the corresponding eigenvector of the iterative method, especially for large sparse matrix. However, the general power-law iteration vector v is not equal to zero all the components will be as k tends to infinity overflow of the computer. Therefore, we must pass a law to regulate screen. That is, standardized Power Method)

K MEANS CLUSTERING SOFTWARE ENGINEERING

MUSIC算法[1] 是一种基于矩阵特征空间分解的方法。从几何角度讲，信号处理的观测空间可以分解为信号子空间和噪声子空间，显然这两个空间是正交的。信号子空间由阵列接收到的数据协方差矩阵中与信号对应的特征向量组成，噪声子空间则由协方差矩阵中所有最小特征值（噪声方差）对应的特征向量组成。MUSIC算法就是利用这两个互补空间之间的正交特性来估计空间信号的方位。噪声子空间的所有向量被用来构造谱，所有空间方位谱中的峰值位置对应信号的来波方位。MUSIC算法大大提高了测向分辨率，同时适应于任意形状的天线阵列，但是原型MUSIC算法要求来波信号是不相干的。(algorithm MUSIC is a method based on matrix feature space decomposition. From a geometric point of view, the signal processing of the observation space can be decomposed into signal subspace and noise subspace, it is clear that these two spaces are orthogonal. Signal subspace by the array received data covariance matrix and signal corresponding to the feature vector and noise subspace is by the covariance matrix of all minimum feature values (noise variance) corresponding to the feature vectors are composed. MUSIC algorithm is to use the orthogonal characteristics of these two complementary space to estimate the azimuth of spatial signals. All vectors of the noise subspace are used to construct spectral, and the peak position in all spatial azimuth spectra correspond to the direction of arrival of the signal. MUSIC algorithm greatly improves the direction finding resolution, and at the same time it is suitable for the antenna array of any shape, but the prototype MUSIC algorithm requir)

principal component analysis+ databases

说明：  一本matlab初学者的入门级经典书籍编程人员案头必备的一本参考书籍,英文版,有助于提高英文及编程技术.(An entry-level matlab beginner programmers classic books necessary for a desk reference book, in English, help to improve English and programming.)

C++primer的中文版，一本很好的C++入门书籍。原著作者为：Stanley B.Lippman，由李师贤等翻译。(Chinese version of ‘C++primer’，original author is Stanley B.Lippman)

详细描述了pid各项参数的调试过程，主要是用于电机控制中。(A detailed description of the commissioning process pid parameters, mainly for motor control.)

PDF book about breaking into systems without authorization for educational purposes to better secure your systems

matlab similarity matching using SAD filter