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In the terahertz (THz) band, materials that could be seen as smooth and homogeneous at microwave frequencies may display surface and volumetric scattering behavior. In this paper, we apply the integral equation method (IEM) and the vector radiative transfer (VRT) theory to simulate surface and volumetric scattering by a rough material boundary, respectively, in order to study the scattering characteristics...
In order to solve multi access interference (MAI) effect of multi-user blind detection in underwater acoustic communication networks, blind adaptive multi-user detection method based on improved Kalman filter algorithm was proposed. This method can suppress the MAI problem when the user number increases. Simulation was done for both traditional Kalman method and improved Kalman method in synchronous...
A robust predictive control algorithm based on memory state feedback is proposed for a class of uncertain discrete time system with input constraint and multiple state delays. By introducing Lyapunov-Krasovskii function and using linear matrix inequality (LMI) method, the algorithm can convert the infinite time domain optimization problems into linear programming problems. Sufficient conditions of...
The space vector pulse width modulation (SVPWM) exhibits unique advantages when applied to Permanent Magnet Linear Synchronous Motor (PMLSM) control systems. In the paper, principle and algorithm of SVPWM and mathematical model of PMLSM are analyzed. Simulation model of Frequency Conversion Timing Control System is set up by MATLAB/SIMULINK for PMLSM based on SVPWM algorithm. This provided a good...
There are more and more attacks aiming at P2P network, and those attacks take on sophisticated technology and hidden ways, which bring in serious threat to P2P network. Current countermeasure only copes with one certain kind of P2P attack, and is powerless to other attacks or new emerged attack. We have researched features and effects of main P2P attacks with quantitative analysis method, and have...
A virtual instrument (VI) based fuzzy control system for permanent magnet linear synchronous motor (PMLSM) drive is presented in this paper. Mathematic model of the PMLSM is presented and the stepper drive scheme is used in the position loop of PMLSM drive. To improve the performance of PMLSM drive, a LabVIEW based fuzzy controller (FC) is proposed for the position loop of PMLSM drive to deal with...
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