71402020-M701_Camera-YHM701F_03.1(GC0329)

基于UML的食堂就餐卡系统的分析与设计 (UML-based cafeteria dining card system analysis and design of)

已知：信号中心波长为2,天线阵元的间距为1米,快拍数为2000，空中有四个 源信号,假设它们的频率 四个源信号的方向分别为： 求： 1）在不加入噪声的情况下,观察并计算协方差矩阵特征值,并对它的特点 加以说明 2）分别采用MUSIC算法,CAPON算法, ESPRIT算法在下面四种情况下，对 上述四个信号源的波达方向进行估计,并画出它们的空间谱图； ①在不加入噪声的情况下, ②在加入高斯白噪声的情况下,假设信噪比为10dB 3）在信噪比变化范围为-20dB~+20dB时，分别采用MUSIC算法,CAPON算 法, ESPRIT算法，对上述四个信号源的波达方向进行估计,并画出波达方 向估计误差,随着信噪比变化的曲线图(即横轴为信噪比,纵轴为误差值)()

可再生能源光伏发电和风力发电是重要的能源，而外界环境的影响也要分析，提出的方案很好地适应了这种变化。(The integration of renewable resources such as solar and wind energy is becoming increasingly attractive. This is being used widely for bstitution of oil-produced energy and will help to minimize atmospheric degradation.)

sync generator pscad

说明：  LLC系统设计，主要介绍了经典LLC设计思路和计算方法，很实用！(System design of LLC)

详细设计10KW逆变器的英文资料，内有原理图，有较大参考价值(10KW inverter detailed design information in English, there are schematic, a larger reference value)

在电网电压频率波动或者三相不平衡的情况下,硬件锁相很难准确检测到基波正序的相位。在结合PWM整流器空间矢量解耦控制算法的基础上,将软件锁相环技术应用在PWM整流器控制系统中,并用仿真和实验验证了该方案的可行性。实验结果表明,该方案解决了电网电压频率波动及三相不平衡时的相位同步等问题,并在工程上具有一定参考价值。(Frequency or voltage fluctuations in three-phase unbalanced case, the hardware lock is difficult to accurately detect the fundamental positive sequence phase. In the space vector PWM rectifier with decoupling control algorithm based on the software used in the PWM rectifier PLL control system, and use simulation and experimental verification of the feasibility. Experimental results show that the solutions to address the voltage and frequency fluctuations of the phase unbalanced three-phase synchronization issues, and the project has a certain reference value.)

实现了Yuri Y. Boykov论文中最简单的图割算法(vs2013)(graph-cuts algorithm,writing accoding to the aritcle that Yuri Y. Boykov public lished (vs2013))

最新USB3014 GPIF第二版正式版(the lastest USB3014 GPIF)

SUNRF-2012 配置型 透明无线模块 无线485 无线232 产品PCB——LIB 尺寸资料 ，直接PROTELL99SE使用(SUNRF-2012 configuration and transparent wireless 485 wireless 232 wireless module products PCB- LIB size data, with direct PROTELL99SE)