Wang Rongjie

A class of blind source extraction method using second-order statistics

A class of second-order statistics-based algorithms consisting of the offline BSE, online BSE algorithms, and they are proposed for extracting stationary and nonstationary signals. Within our algorithm, the new cost functions were given by exploiting the prosperities of signals, and a steepest descent update method of parameter-free adaptive steps-size was proposed to obtain optimal extracted weighted vector. Simulation results for stationary and nonstationary show that the proposed algorithms have the ability to restore original signals one by one, and its superior performances to the higher-order statistics-based BSE algorithm. Moreover, the steepest descent update method of parameter-free adaptive steps-size has the following merits: no parameters to be adjusted manually, low computational cost and no additional preprocessing requirements.

Design of Photovoltaic automatic Tracking System for solar energy utilization

This paper gave a particular description of a tracking and concentration system for solar energy utilization. A Multi-glasses Concentration and Tracking Photovoltaic System is designed. A research on the racking and concentration system for solar energy utilization was made. A tracking system based on the theory that solar can be gathered depending on plane mirror reflecting was set up. And an implement project of racking and concentration system for solar energy utilization was put forward. Hardware and software of the racking and concentration system for solar energy utilization was designed. Include of: the design of logic circuit control module, the design of AC-electromotor driver module the design of temperature detecting module. The results of the kind debugging showed, the controller designed to meet the requirements.