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锁相环模块：熟悉锁相环内部的内部结构，工作原理。(PLL module: familiar with the internal structure and working principle of PLL.)

科斯塔斯环的一个程序 希望对大家有用~~~~(about costas)

说明：  我提供了一个基于FXLMS的单通道前馈有源噪声控制系统的一个小例子. 为了减少噪声，我们使用控制器C（z）产生另一个“噪声”yw（k）。我们希望它破坏性地干扰X（k）。这意味着控制器必须是传播介质P（z）的模型。采用最小均方算法对控制器系数/权重进行调整。 然而，还有流体介质S（Z）留在致动器和传感器之间。我们称之为二次传播路径。所以，为了使解正确，我们需要用SH（z）来补偿调整过程，这是S（z）的估计(I provided him a little example of a single channel feed-forward active noise control system based on the FxLMS. To reduce noise, we generate another 'noise' yw(k) using the controller C(z). We hope that it destructively interferes x(k). It means that the controller has to be a model of the propagation medium P(z). Least mean square algorithm is applied to adjust the controller coefficient/weight. However, there is also fluid medium S(z) that stay between the actuator and sensor. We called it the secondary propagation path. So, to make the solusion right, we need to compensate the adjustment process using Sh(z), which is an estimate of S(z).)

说明：  显示模拟时钟和数字时钟能看到指针在动可附加红外程序或者温度程序。(Display analog and digital clocks to see the pointer moving can be added to the infrared program or temperature program.)

说明：  遗传算法求解微电网，进行算例分析，有数据(Genetic algorithm to solve the micro grid, there are data)

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  超市进销存管理系统应该具有以下功能： l          前台销售结帐。 l          基本信息管理。 l          基本信息查询。 l          日结查询。 l          超市小票打印。

windows计算器，有加减乘除功能，和windows自带的计算器类似(windows calculator, a subtraction multiplication and division functions, and a similar calculator that comes with windows)

欧姆龙的NJ控制器与视觉控制器通信实例，内有详细的注释(OMRON NJ controller and visual controller communication example, there are detailed notes.)

说明：  山东地图基础资料SHP格式，不适用于ARCGIS(SD MAPS,not use for ArcGIS)