yuandongji

发射部分采用锁相环式频率合成器技术， MC145152和MC12022芯片组成锁相环，将载波频率精确锁定在35MHz，输出载波的稳定度达到4×10-5，准确度达到3×10-5，由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制；末级功放选用三极管2SC1970，使其工作在丙类放大状态，提高了放大器的效率，输出功率达到设计要求。-Part of the launch phase-locked loop frequency synthesizer using technology, MC145152 and MC12022 PLL chips to lock in the exact carrier frequency 35MHz, the output carrier to achieve the stability of 4 × 10-5, reaching the accuracy of 3 × 10-5 by the varactor diode V149 and integration to achieve MC1648 chip VCO FM modulation on the carrier selection transistor amplifier at the end of class 2SC1970, to work in the C state to enlarge and improve the efficiency of the amplifier output power to meet the design requirements.

谢谢大家的对我的支持，我觉得学习html就必须认真，在认真，在认真，不然没效果，我说的对吧(English words will not be available for the time being, thank you for all the support for me, I feel that learning HTML must be serious, in earnest, in serious, otherwise there is no effect, I said right)

说明：  该程序实现了对网站数据的爬虫以及词云图，各个省份疫情图，中国疫情图和世界疫情图。(The program realizes crawler and word cloud map of website data, epidemic map of each province, epidemic map of China and epidemic map of the world.)

CC2592 hex fie for 6lowpan

圣诞快到了，做了个恶搞程序，一打开程序，当前窗口就不停地抖动，显示屏会不间断出现白色亮点就像下雪一般.-Christmas is coming, made a program, an open procedure, the current window on non-stop to shake, the display will continuously appear as bright white snow in general.

讲述的是海面的各种散射情况的文章，包括经向散射，曼散射等(About the various scattering off the article, including by the scattering, scattering, etc. Man)

1) 使用凝聚型层次聚类算法（即最小生成树算法）对所有数据点进行聚类，最后聚成3类。相异度定义方法可选择single linkage、complete linkage、average linkage或者average group linkage中任意一种。 2) 使用C-Means算法对所有数据点进行聚类。C=3。 任务2（必做）： 使用高斯混合模型（GMM）聚类算法对所有数据点进行聚类。C=3。并请给出得到的混合模型参数（包括比例??、均值??和协方差Σ）。 任务3（全做）： 1) 参考数据文件第三列的类标签，使用聚类有效性评价的外部方法Normalized Mutual Information指标，分别计算任务1和任务2聚类结果的有效性。 2) 使用聚类有效性评价的内部方法Xie-Beni指标，分别计算任务1和任务2聚类结果的有效性。(The main results are as follows: 1) the condensed hierarchical clustering algorithm (that is, the minimum spanning tree algorithm) is used to cluster all the data points, and finally it is grouped into three categories. Any of the single linkage,complete linkage,average linkage or average group linkage methods can be selected for the definition of dissimilarity. 2) using C-Means algorithm to cluster all data points. C = 3.)

myPrint2 打印控件 myPrint2 打印控件-Print Print myPrint2 control myPrint2 control

说明：  VF算法控制三相无刷电机，开环控制，无传感器(VF controlled three-phase brushless motor)

本源程序提供在AWGN信道下的bpsk调制方式的仿真，并与理论曲线作比较，得到了理想的结果-This source provides bpsk under the AWGN channel modulation of the simulation, and compared with the theoretical curve obtained satisfactory results