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摘　要:根据HFC网络上行信道的特性,建立了信道模型 分析了上行信道中存在的各种噪声对QPSK 调制技术的影响。结果表明在C /N (传输信道载噪比)较低的情况下,采用QPSK调制方式,可以提高系 统的抗干扰能力。 关键词: QPSK 光纤同轴电缆混合网 上行信道 噪声(Abstract: HFC network in accordance with the characteristics of the uplink channel, the establishment of a channel model an analysis of the various uplink channel noise on the impact of QPSK modulation. The results show that the C/N (transmission channel carrier-to-noise ratio) lower, the use of QPSK modulation, can improve the system of anti-interference ability. Keywords: QPSK hybrid fiber coaxial cable network uplink channel noise)

说明：  通过复杂例子，采用误差反向传播的BP算法，实现Kp、Ki、Kd参数自整定(Through complex examples, BP algorithm of error back propagation is adopted to realize self-tuning of Kp, Ki and Kd parameters)

controls light is a house

一共四个蚁群算法 程序源码，三个matlab，一个C语言(A total of four procedures for source code ant colony algorithm, three matlab, a C language)

二值图像的arnold置乱，二值图像为方阵，作用是打乱图像的相关性(Arnold scrambling of the binary image, binary image for the square, to disrupt the image correlation)

this is one of the best satelite code in the world to find the look angle

传感器网络的关系，半径和程序中的节点数的连通概率和通信，利用MATLAB软件对部署图的计算机模拟(The relationship of sensor networks, the connectivity probability and communication radius and the number of nodes in the program, use the Matlab software on the computer simulation of deployment and mapping)

实现基本leach分簇，每个节点带有能耗，根据每次数据交换的能耗处理能量，可以记录第一个节点死亡的时间(leach cluster)

一篇基于三维的传感器网络部署算法的论文希望和大家一起学习(wsn)

深度优先搜索属于图算法的一种,英文缩写为DFS即Depth First Search.其过程简要来说是对每一个可能的分支路径深入到不能再深入为止,而且每个节点只能访问一次.(DFS Depth First Search is a kind of graph algorithm, English abbreviation for DFS is the Depth First Search. The process is briefly branch of every possible path can t go deep into the deep, and each node can only access at a time.)