matlab

针对二维熵图像分割方法在求取最佳阈值时存在计算量大及微粒群算法容易陷 入局部最优且速度较慢等等问题, 提出了基于混沌粒子群优化算法的二维熵图像分割方法。 该方法考虑了图像中像素点灰度􀀂 􀀂 􀀂 邻域灰度均值对作为阈值对图像进行分割 利用混沌运 动随机性、遍历性和初值敏感性, 将混沌粒子群优化算法与阈值法相结合在二维空间作全局搜 索。实验结果表明了基于混沌粒子群优化算法的二维熵图像分割法用于阈值寻优减少了搜索 时间, 提高了收敛率。(Calculation of its large capacity and particle swarm algorithm is easy to fall to strike the best threshold for the two-dimensional entropy image segmentation method Into the local optimum and slower, the proposed two-dimensional entropy image segmentation method based on chaotic particle swarm optimization algorithm. The method takes into account the image pixel the gray 􀀂 􀀂 􀀂 neighborhood average gray value as a threshold for image segmentation chaotic transport Dynamic randomness, ergodicity and initial value sensitivity of chaotic particle swarm optimization algorithm with the threshold method in two-dimensional space for the global search On request. Experimental results show that the entropy method of image segmentation method based on chaotic particle swarm optimization algorithm for threshold optimization to reduce the search Time and improve the convergence rate.)

The code implements an approximation of the multivariate bandwidth calculation from (The code implements an approximation of the multivariate bandwidth calculation from [1]. In contrast to other multivariate bandwidth estimators, it can be estimated from a preclustered sample distribution offering a simple way of estimating compact and accurate KDEs with variable kernels.)

说明：  AR谱估计函数，内置基于FPE准则、AIC准则以及CAT准则判定AR阶数(AR spectral estimation function, built-in standards-based FPE, AIC criteria and guidelines to determine the AR order of CAT)

说明：  这个确实有用 大家可以任意下载 完全免费的(this really useful we can download any free)

用matlab实现了对于已知序列求其离散傅里叶变换，并给出了三个实际例子进行解释。(Achieved with matlab known sequence requirements for its discrete Fourier transform, and gives practical examples to explain the three.)

编写程序将含有20个数据的数组M分成两个数组：正数组P和负数组N，并分别统计两个数组的个数，显示在屏幕上。(Write a program containing the data array 20 is divided into two arrays M: positive and negative groups Array P N, and the number of two arrays statistics were displayed on the screen.)

matlab实用程序小合集第3部分，都是一些完成特定功能的小程序，很适合新手朋友(matlab utility small collection Part 3, are some small programs to accomplish a specific function, it is suitable for novice friend)

精度很高的多椭圆中心提取代码。算法参考论文：A Simple Operator for Very Precise Estimation of Ellipses.

Region fucion homogenity creterea

结合Off-Policy的重要采样方法设计的EM策略搜索，用于处理连续状态和动作高维控制问题，例子为小球平衡问题。(Off-Policy sampling method designed EM strategy Search for processing the continuous state and action high-dimensional control problems, for example, is a small ball balance problems.)