calculator

一个报童从报刊发行中心订报后零售，每卖一份报纸可赚钱a元；若报纸卖不出去，则退回发行处，每退一份要赔钱b元。每天报童卖出的份数是随机的，但报童可以根据以往卖报情况统计得到每天卖k份报纸的概率密度p(k)。 （1） 求报童每天期望收益达到最大（或损失达到最小）的定报量z。 （2） 改变参数a/b的值，观察订报量的最优值变化，画出变化曲线。 试画出仿真流程图，进行程序实现，并对仿真结果进行分析。 (A newsboy subscribe from the press after the retail distribution centers, each sale of a newspaper can make money a million if newspapers can not be sold, then returned to Issue Department, each retire to a loss of a b element. Newsboy sold shares in a day is random, but the newsboy can sell based on past statistics reported to be selling daily newspaper k the probability density p (k). (1) seeking newsboy expected profit per day to maximize (or minimize loss) reported that the volume of fixed-z. (2) change the parameters a/b values, subscribe to observe changes in the volume of the optimal value, draw curve. Simulation test to draw a flow chart for program realization, and simulation results for analysis.)

说明：  利用matlab读取ers1/2sar 数据 代码简洁使用，希望能够起到抛砖引玉的作用(using matlab REDA ers sar data)

image file will rotate and give you translational matrix

插值法求出阶跃响应的Ts，Tr，deta，性能指标。方法准确，简单(interpolation step response is calculated by the Ts, Tr, deta, performance indicators. The method is accurate and simple)

数模源程序，港口模拟源程序，正在学数模的可以下载，到时直接应用，或者借鉴。。。(Digital-analog source, port analog source, is learning digital-analog can be downloaded, when applied directly, or draw. . .)

nutrient prediction for baby. this function can predicted baby nutrient with 90 accurated

to calculate psnr for images by matlab

说明：  采用不同的方法对HRV信号进行功率谱估计。选择矩形窗，汉宁窗，汉明窗，Blackman窗(Using different methods of HRV signal power spectrum estimation.Select the rectangular window and hanning window, hamming window and Blackman window)

说明：  复合材料属性矩阵A，B,D,As的确定，通过这些矩阵可以计算材料刚度矩阵(form material matrix of composite material)

基于matlab的小波分析工具箱WAVELAB850(based on the wavelet analysis Matlab toolbox WAVELAB850)