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混沌发展，历史和编码，混沌的研究方法及编码。(Chaotic development, history and coding, chaos research methods and coding.)

使用stepwise方法选择因变量的基于AR模型的时间序列预测程序(This alogrithm can select the predictors using step-wise policy and forecast the time series based on AR model.)

短时傅里叶变换提取线性调频雷达信号的时频分布，具有很好的效果(When the short-time Fourier transform to extract chirp radar signal frequency distribution, with good results)

L4_1.m: SVD轉換(程式) L4_2.m: 影像轉換的能量集中能力(程式) L4_3a.m: 小波轉換之多重解析架構(程式) L4_3b.m: 小波轉換係數與影像的方向性(程式) energy.m: 能量集中(函式) L4_1.bmp: 影像檔 L4_2.bmp: 影像檔 L4_3b.bmp: 影像檔 woman.mat: Matlab的矩陣變數檔 (L4_1.m: SVD conversion (program) L4_2.m: image conversion of energy to focus capacity (program) L4_3a.m: the multi-resolution wavelet transform architecture (program) L4_3b.m: wavelet transform coefficient and the direction of the image (the program) energy.m: energy concentration (function) L4_1.bmp: image file L4_2.bmp: image file L4_3b.bmp: image file woman.mat: Matlab matrix variable file)

（1）输入职工数据，其中“实付工资”通过计算得到。 （2）显示全体职工数据。 （3）输入某部门值，显示该部门职工的数据、工资总额、平均工资 ((1) Input employee data, which " wages paid" Through calculated. (2) show that all employees data. (3) Enter the value of a department to show workers in the sector data, the total wages, average wage)

engineering optimization methods using newton method, quasi newton method, and conjugate gradient method

如何在vc6中调用matlab引擎进行科学计算。 包括，初始化引擎，数据交换等。(How to call matlab engine vc6 for scientific computing. Include engine initialization, data exchange, etc..)

it is helpful to konw the characreristics of bpsk modulation technique

本模型是基于matlab Simulink搭建的PQ控制和下垂控制模型，可以用于微电网的并网和孤岛运行PID参数已经调好，效果理想，可以供参考。(This model is based on the model of PQ control and droop control built by MATLAB Simulink. It can be used in the parallel operation of microgrid and islanding operation. The PID parameters have been adjusted, and the effect is ideal, which can be used for reference.)

说明：  一楼房的后面是一个很大的花园. 在花园中紧靠着楼房有一个温室,温室伸入花园2m,高3m,温室正上方是楼房的窗台. 清洁工打扫窗台周围,他得用梯子越过温室,一头放在花园中,一头靠在楼房的墙上. 因为温室是不能承受梯子压力的,所以梯子太短是不行的. 现清洁工只有一架7m长的梯子, 你认为它能达到要求吗? 能满足要求的梯子的最小长度为多少?(The back of a building is a big garden. In the garden close to a building in a greenhouse, greenhouse into the garden 2m, high-3m, the greenhouse is the top of the building' s bay windows. Cleaners cleaning around the windowsill, he crossed to use a ladder greenhouse, on a garden, against a building wall. because of the greenhouse can not bear the pressure of a ladder, so the ladder is not too short. cleaners are only a 7m long ladder, do you think it can meet the requirement it? ladder to meet the requirements of the minimum length of the number?)