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文章讲述了现在韩国的频谱政策和动态频谱接入技术。过去韩国的频谱管理政策需要特权，并且只有一小部分频谱可以公用。随着无线技术的发展，现在，韩国政府，使用了机遇动态频谱接入的新型频谱策略，例如LBT技术用于REID，UWB和FACS等。MIC还考虑如何在DTV过渡完成后，重新分配频谱。新型的无线电技术如认知无线电和SDR将在UHF边带中应用新的服务。MIC试图用一用有效地方式开放频谱并接受新技术用于频谱策略中。(In this paper, we introduce spectrum policies and dynamic spectrum access technologies in Korea. In the past, Korea spectrum management was the command and control with exclusive usage rights and small portions of spectrum commons bands. With the development of the radio technologies, Recently, Korea government, MIC(ministry of information and com- munication), has been adopting new spectrum policies based on dynamic spectrum access technology such as LBT(Listen Before Talk) for RFID, UWB, and FACS(Flexible Access Common Spectrum) etc. MIC is also considering spectrum reallocation of digital dividend bands after DTV transition. New radio techniques such as cognitive radio and SDR will be applied to new services in this UHF band. MIC is trying to open the radio spectrum in an efficient way and adopt new technology into spectrum policy. Thus MIC is extending the open spectrum such as spectrum commons and spectrum liberalization bands. )

说明：  编了一个用C++程序实现BP网络的异或问题。(compiled a C program BP network problems or differences.)

MATLAB/Simulink与过程控制系统仿真（修订版）书籍配套程序(MATLAB/Simulink simulation and process control systems (revised edition) books supporting program)

MATLAB学习的基础资料，便于初学者快速查找各类函数(Biography MATLAB learning easy for beginners to quickly find all types of functions)

PSO-ACO-TSP算法，解决旅行商问题，结合PSO和ACO算法(PSO- ACO- TSP algorithm to solve the traveling salesman problem, and with PSO and ACO Algorithm)

通过bp神经网络，读取水深和多光谱遥感图像的dn值，实现水深的反演功能(Bp neural network, read dn value of the water depth and multi-spectral remote sensing image inversion function of water depth.)

电力系统的潮流MATLAB计算问题 可以方便的计算潮流(MATLAB power flow calculation problem can easily calculate the trend )

MASReperageSecteur simulation of sector it is used for controling the inverters switch

基于训练符号的OFDM（正交频分复用）系统的仿真(Training OFDM symbols based on the simulation system)

用于数学建模，评价类模型，层次分析法的代码(For mathematical modeling, evaluation class model, AHP code)