fh_daima

说明：  Estimating the positions of sensor nodes is a fundamental and crucial problem in ad hoc wireless sensor networks (WSNs). In this paper, an accurate node localization method for WSNs is devised based on the weighted least squares technique with the use of time-of-arrival measurements. Computer simulations are included to evaluate the performance of the proposed approach by comparing with the classical multidimensional scaling method and Cram´ er-Rao lower bound.

说明：  Dynamic and steady state model of Doubly fed induction generator back to back supply for wind energy power system using matlab

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hessian matlab algorithm

利用som算法进行数据的聚类，实现无监督聚类(clustering the data with the som algorithm, that can relizing unsupervised cluster)

说明：  生成n维变量的拉丁超立方样本点，直接导出样本点。(Generate the sample points of n-dimensional input vectors.)

说明：  MATLAB s函数编程实例 可以让新手更好理解和入门，学习MATLAB的高级函数编程(MATLAB s function programming example can help newcomers better understand and get started, learn advanced function programming of MATLAB)

matlab程序将传递函数通过Z变换使其离散化，然后再把得到的脉冲传递函数改写成差分方程。便于接下来一步的C程序编程。(matlab program will transfer function Z-transform them through discrete, then put the resulting pulse transfer function of a differential equation rewritten. Facilitate the next step of the C programming.)

Hybrid PV-wind generation shows higher availability as compared to PV or wind alone. For rural electrifications, researches are focused on hybrid power system which provides sustainable power. The variable voltage and frequency of the self excited induction generator (SEIG) is rectified through Vienna rectifier (three switches) to the required D.C voltage level and fed to common D.C bus. The variable output voltage of PV module is controlled by DC/DC converter using proposed fuzzy logic controller and fed to common D.C bus. The DC bus collects the total power from the wind and photovoltaic system and used to charge the battery as well as to supply the A.C loads through inverter. A dynamic mathematical model and MATLAB simulations for the entire scheme is presented. Results from the simulations and experimental tests bring out the suitability of the proposed hybrid scheme in remote areas.

说明：  采用谱元法计算声传播问题，带matlab代码(spectral method used for wave transmission problems, with matlab code)