OFDMA资源分配

说明：  对于无约束的非线性方程的求解以及有约束的线性方程的求解，粒子群算法表现较好的收敛性且鲁棒性较好。基于遗传算法的有约束的线性方程的最优值寻优，选取如下所示的目标函数（最小值）：(For solving unconstrained nonlinear equations and constrained linear equations, particle swarm optimization algorithm has good convergence and robustness. Based on the optimization of the constrained linear equation of genetic algorithm, the objective function (minimum value) is selected as follows:)

说明：  该文件提供微电网模型的基本组成部分，包括SUMULINK仿真图，计算公式等。(The file provides the basic components of the microgrid model, including SUMULINK simulation diagram, calculation formula, etc.)

说明：  422发送源码，目前使用的是20m时钟计算出来的波特率，后期可以根据自己的需要进行修改波特率时期匹配各种情况(422 sends the source code. At present, the baud rate calculated by 20m clock is used. Later, you can modify the baud rate according to your own needs to match various situations)

CS结构的VB网络数据库读取及操作程序，程序由服务端和客户端程序组成，两者都运行才能正确读取数据库，演示远程数据库数据读取和数据保存，演示程序是读取的数据库中的用户信息。

说明：  removal of space VBA excel

Engaged in LAN development, multimedia technology engineers

通过菜单的start 来开启一个线程程，以及停止功能来停止一个线程，同时可以开启多个线程，来实现界面图形多个时钟功能-Through the start menu to open a thread process, as well as the stop function to stop a thread, multiple threads can be opened at the same time, to achieve graphical interface features a number of clock

说明：  An Android weather project source code, using the API provided by Baidu, has the basic functions of weather query, city settings, Short Message Sharing weather, the interface is refreshing, but now because of Baidu key failure, can not update the weather. The code has more detailed comments. Code volume is not large, interested friends can check it by themselves.

SIMULINK 入门教程,详细讲解了SIMULINK的具体操作,参数设置,并附有练习习题.-SIMULINK Tutorial, SIMULINK detailed account of the specific operation, parameter setting, together with practice exercises.

下垂控制就是选择与传统发电机相似的频率一次下垂特性曲线（Droop Character）作为微源的控制方式，即分别通过P/f下垂控制和Q/V下垂控制来获取稳定的频率和电压，这种控制方法对微网中的微源输出的有功功率和无功功率分别进行控制，无需机组间的通信协调，实现了微源即插即用和对等控制的目标，保证了孤岛下微电网内电力平衡和频率的统一，具有简单可靠的特点(Droop control is to choose Droop Character, which is similar to the traditional generator, as the control mode of micro-source, that is, to obtain stable frequency and voltage through P/f droop control and Q/V droop control respectively. This control method controls active power and reactive power of micro-source output in micro-grid separately, without communication coordination between units. The goal of micro-source plug-and-play and peer-to-peer control is realized, which ensures the unification of power balance and frequency in the micro-grid under isolated islands, and has the characteristics of simplicity and reliability.)