chazhi

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)

求解病态方程的matlab 正则化工具箱，含说明(The matlab toolbox for regularizing the ill-posed problem, including the instructions )

基于电流，转速的双闭环永磁同步电机的矢量控制的仿真模型。。。(Based on current double closed loop speed permanent magnet synchronous motor vector control simulation model)

黄金分割法求极小，返回值fm为函数极小值，tm为极小值点，f为给定函数，t为函数变量，[a,b]为变量t的搜索区间(Golden section method is extremely small, the return value for the function fm minimum, tm for the minimum point, f for a given function, t for the function of variables, [a, b] for variable search interval t)

香农编码源程序 如：p=[0.4 0.3 0.2 0.1] shannon(p)(shannon source code)

实现matlab的牛顿法。牛顿法是非常有高效的，它是许多强大的数值方法的基础。(Matlab realize the Newton method. Newton method is very efficient, it is many a strong basis of numerical methods.)

sir/mam, i have added some matlab source codes,in turn provide some required matlab source codes

基于matlab的平方根容积卡尔曼滤波SCKF程序，是一种较好的非线性滤波方法，希望促进大家的理解。(Based on the square root of the volume of the Kalman filter matlab SCKF program, it is a good non-linear filtering method, we hope to promote understanding.)

该界面可以用来分析控制系统在时域，频域和使用状态空间分析技术。它还提供了在采用极点配置的方法设计一个二阶系统的状态空间设计额外的特征。(This GUI can be used to analze control systems in time domain, in frequency domain and using using state space analysis techniques. It also provides an additonal feature of designing a second order system in state space design using pole placement approach. )

基于欧几里得距离的聚类分析，未来线路预测,分析误差,阐述了负荷预测的应用研究。( Clustering analysis based on Euclidean distance, Future line prediction, error analysis, It describes the application of load forecasting.)