percentile_plot

本文基于BP神经网络应用于预测的原理，提出预测步骤及预测可行性，探讨建立基于BP神经网络的预测模型的关键技术，包括样本的选取与预处理、输入输出变量的选取、隐层节点数的确定、初始权值和阈值的选取、激活函数、训练算法与参数的选取，最后建立合理的网络模型；结合住宅市场的实际情况，建立两类BP 神经网络预测模型：基于时间序列的趋势预测模型以及基于影响因素的回归预测模型，即分别采用神经网络趋势预测和回归预测的思路，把住宅市场的供给、需求与房价的历年数据以及其影响因素的数据分别作为学习样本，建立预测模型，进行预测。(Real estate development risk prediction )

师兄写论文用的混沌工具箱，传上来分享给大家(The brothers write papers chaotic Toolbox pass up for everyone to share)

how to placement by GA

matlab support vector machine training part 1

对于bpsk直扩系统的误码仿真，直扩系统对于功率、频偏、相偏的鲁棒性。(For bpsk DSSS BER simulation systems, direct expansion systems for power, frequency offset, phase offset robustness. .)

傅里叶变换 Z变换 拉普拉斯变换的gui(Fu Liye transform, Z transform, Laplasse transform, GUI)

MATLAB的编程，用于哈弗曼码的编码和解码，希望会对你用途啊(MATLAB programming for Havermann code encoding and decoding, I hope you will use ah)

模拟退火算法，模拟退火算法来源于固体退火原理，将固体加温至充分高，再让其徐徐冷却，加温时，固体内部粒子随温升变为无序状，内能增大，而徐徐冷却时粒子渐趋有序，在每个温度都达到平衡态，最后在常温时达到基态，内能减为最小。(Simulated annealing algorithm, simulated annealing algorithm derived from the principle of solid annealing, heating the solid to the full high, let it slowly cooling, heating, the solid particles with the internal temperature rise to disorder symptoms, which can be increased, and slowly gradually cooling particles in an orderly manner, at each temperature to reach equilibrium, and finally at room temperature reaches the ground state, which can be reduced to a minimum.)

Genetic algorithms in 8 queen problem

图像分割的matlab代码，运行效果很好的。(Image segmentation matlab code, run very good.)