matlab

说明：  简易电子乐器，基本功能都具备，能进行电子琴弹奏等等(Simple electronic instrument)

迅雷，工具大家都很清楚的，-Thunderbolt, tools, we are all very clear, after another Ding Ding Ding Ding Ding Ding

柔性直流输电技术是比传统直流输电更先进的直流输电技术。所以除了拥有传统高压直流输电技术即可以控制有功功率又可以控制无功功率、输电距离基本不受限制、直流输电比交流输电更稳定、实现异步系统互联和减轻环境影响的优点，柔性直流输电还具备许多自身特有的优点。(Flexible HVDC transmission technology is more advanced than traditional HVDC transmission technology. Therefore, in addition to the advantages of traditional HVDC technology, such as active power control and reactive power control, almost unlimited transmission distance, more stable HVDC than ac transmission, asynchronous system interconnection and environmental impact reduction, flexible HVDC also has many unique advantages.)

说明：  动态因子分层模型，用于经济分析商品初期价格，内容四层动态因子分析模型(Dynamic factor hierarchical model, which is used to analyze the initial price of goods economically, and four level dynamic factor analysis model of content)

隐藏windows系统托盘中指定进程名的图标，(Hide tray icons in the specified process name and refresh)

单相逆变并网电路的主电路与控制电路的 simulink 拓扑结构图， 主电路由直流源、 mosfet 全桥、 LC 无源滤波器、 负载 R1、 R2 组成， 其中 R1 为 恒定负载， R2 为仿真负载突变并入的。 控制电路为 SPWM 闭环调制， 通过检测输出端的电压有效值通过 PI 控制器反 馈回控制端使输出电压尽可能为一个优质的正弦波且有效值在 220V 左右， 频率 为 50Hz， 根据相关准则输出电压波形 THD 应在 5%以内。(The Simulink topology of the main circuit and the control circuit of the single-phase inverter grid connected circuit, The main circuit is composed of DC source, MOSFET full bridge, LC passive filter, load R1 and R2, wherein R1 is The constant load, R2, is incorporated into the simulation load mutation. The control circuit is SPWM closed loop modulation, and the effective value of the output voltage is detected through the PI controller The feed back control makes the output voltage as high as possible a sine wave, and the effective value is about 220V, frequency For 50Hz, the output voltage waveform THD shall be within 5%, according to the relevant guidelines.)

avr串口开发,计算串口的数据,及开发的代码-avr development, the calculation of serial data, and the development of the code

teach yourself C++ in 21 days 第五版-teach yourself C in the fifth edition of 21 days

通过该程序可以计算前缀、中缀和后缀表达式的值。-Through the program can calculate the prefix, infix and postfix expressions value.

弹性力学与有限元 算例 有限元平面问题 有限元求解器(Elasticity and Finite Element Examples Finite Element Plane Problems Finite Element Solvers)