Rotinas-E..

这两天着迷goolge earth抓图，编写了一个拼图的程序，主要是用到了imread imwrite和对话框几个知识点，很简单的。(This two-day fascination with goolge earth drawings, prepared a puzzle procedures, mainly used in the dialog box imread imwrite and several knowledge points, very simple.)

Thresholding of i/p image

MATLAB混合编程技术,COM（Component Object Model，组件对象模型）是以组件为发布单元的对象模型，是一系列面向对象技术和工具的集合。 (MATLAB program technology)

Echelon factorization A = c a b.

直流-直流变换器的matlab仿真模块，实现了直流降压的功能。(Matlab simulation of the DC- DC converter module, the function of DC buck.)

说明：  在matlab/simulink中，搭建和carsim联合仿真的MPC模型，实现对车速的跟踪(In Matlab / Simulink, the MPC model of joint simulation with CarSim is built to realize the speed tracking.)

张智星教授的数据聚类和模式识别MATLAB工具箱。(MTALAB)

这是bpsk的调制程序代码，它基于matlab环境编写，用于验证调制的效果是否达到设计要求。(qpsk)

S curve of PLL System

一个相当好用的matlab函数，由美国国家可再生能源实验室科研人员设计，可以计算太阳的直射维度和方位角。只要输入时间、观测地点即可。 (This algorithm is based on numerical approximation of the exact equations. The authors of the original paper state that this algorithm should be precise at+/- 0.0003 degrees. I have compared it to NOAA solar table (http://www.srrb.noaa.gov/highlights/sunrise/azel.html) and to USNO solar table (http://aa.usno.navy.mil/data/docs/AltAz.html) and found very good correspondance (up to the precision of those tables), except for large zenith angle, where the refraction by the atmosphere is significant (difference of about 1 degree). Note that in this code the correction for refraction in the atmosphere as been implemented for a temperature of 10C (283 kelvins) and a pressure of 1010 mbar. See the subfunction un_topocentric_zenith_angle_calculation� for a possible modification to explicitely model the effect of temperature and pressure as describe in Reda & Andreas (2003). )