level-set

运用matlab7.1开发一个简单的GUI图形用户界面程序，很好的将GUI跟simulink仿真结合在一起，适合初学者参考。(Matlab7.1 develop a simple to use GUI graphical user interface program will be a very good GUI together with the simulink simulation for advanced users.)

本程序适用于matlab中，读取两幅图像，求取两幅图像的联合熵 程序非常易懂，适合初学者使用，可以用里面的图片进行测试，注意对程序读取图片名进行更改。(Read the two images and calculate the joint entropy of the two images.)

hysys and matlab link3

双级矩阵变换器的MATLAB的仿真实现，完整的验证了双级矩阵变换器的基本原理。(Two-stage Matrix Converter Simulation of MATLAB-)

The Levenberg–Marquardt Method writed by Lourakis

DC power is steady and continuous, with an electrical charge that flows in only one direction. When the output of DC power is represented on a graph, the result would be a straight line. AC power, on the other hand, flows back and forth in alternating directions so that, when represented on a graph, it appears as a sine wave, with smooth and regular peaks and valleys. A power inverter uses electronic circuits to cause the DC power flow to change directions, making it alternate like AC power. These oscillations are rough and tend to create a square waveform rather than a rounded one, so filters are required to smooth out the wave, allowing it to be used by more electronic devices. AdChoices

结构分析有限元法与MATLAB程序设计-源代码 徐荣桥的结构分析的有限元法与MATLAB程序设计的附属程序，好好学习，天天向上！(The structural analysis of the finite element method structural analysis of the finite element method with MATLAB Programming- source code Xu Rong bridge program MATLAB programming subsidiary, a good study, day day up!)

Edge detection result should be enhanced using linear method like Median filter to remove the garbage around the pupil to gain clear pupil to determine perfect centre. Get the centre of the pupil by counting the number of black pixels (zero value) of each column and row. Then get each row and column that has the maximum number of these black pixels. Then determine the center by simple calculation according to the image coordinate to set it correct on the image, consequently we can determine the radius of the pupil. Thus we can find the pupillary boundary (inner). A similar procedure is extended by using a coarse scale to locate the outer boundary (limbus) which can be apparent by using the mid-point algorithms of circle and ellipse.

大学数学实验实验三中的编程练习题目源代码(University Mathematics Experiment Experiment 3 programming source code practice questions)

Spread spectrum techniques can be very useful to overcome the communication problems like security and efficient usage of power. In this technique, the information signal to be transmitted is multiplied by the PN code (This is the general case and it can be any kind of sequence.),called spreading code signal. The signal which is obtained after the multiplication of PN code is called spread signal which is then transmitted.