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This paper studies the implementation and optimization of a high-order weighted essentially non-oscillatory (WENO) solver to the solution of the Euler equations on the multi-core and many-core architectures (Intel Ivy Bridge CPU, Intel Xeon Phi 7110P coprocessor and NVIDIA Kepler K20c GPU). The implementation of up to ninth-order accurate WENO schemes is used in the solver. For the GPU platform, both...
A modified Elman neural network (MENN) based neural adaptive inverse control scheme is proposed for trajectory tracking of rate-dependent hysteresis. To attenuate the influence of the rate-dependent hysteresis, a modified inverse backlash operator (MIBO) is developed to act as the hidden layer neuron of the MENN to describe the dynamic behavior of the inverse rate-dependent hysteresis. The diagonal...
In this paper, we accelerate a double-precision alternating direction implicit (ADI) solver for three-dimensional compressible Navier-Stokes equations from our in-house computational fluid dynamics (CFD) software on the latest multi-core and many-core architectures (Intel Ivy Bridge CPU, Intel Xeon Phi 7110P coprocessor and NVIDIA Kepler K20c GPU). For the GPU platform, both the OpenACC-based and...
Finite-time Lyapunov exponent (FTLE) is widely used to extract coherent structure of unsteady flow. However, the calculation of FTLE can be highly time-consuming, which greatly limits the application's performance efficiency. In this paper, we accelerate a double precision PDE-based FTLE application for two- and three-dimensional analytical flow field on Intel multi-core and many-core architectures...
This paper focuses on the performance aspects of two types of many-core architectures, Tesla K20c GPU and Xeon Phi 31SP coprocessor, in solving complicated flow structures with a high-order weighted essentially non-oscillatory (WENO) scheme. Some performance optimization techniques are also detailed discussed. The results show that the K20c GPU can run several times faster than Xeon Phi 31SP due to...
A novel control scheme for three-phase PWM rectifier is proposed in the paper which improves variable-frequency hysteresis-current control and space vector control due to the fact that there are common shortcomings in the traditional hysteresis controlling method. Compared with traditional current hysteresis control and space-vector control methods, the improving variable-frequency hysteresis and...
A pseudo-Hammerstein model based identification scheme is proposed for rate-dependent hysteresis. In this strategy, the pseudo-Hammerstein model constituted by a nonlinear moving average model with exogenous inputs(NMAX) in series with an auto-regressive moving average(ARMA) model is presented to describe the dynamic behavior of rate-dependent hysteresis. In view of the multi-valued mapping of hysteresis,...
On the basis of the maglev spindle structure design, the PID control system is designed and its mathematical model is established. The influence of the PID control parameters on the response performance of the system is studied by using the MATLAB SISO. The global optimization design of the PID control system is achieved by using SRO (Simulink Response Optimization) module, and the system response...
In order to suppress effectively the effects of RSSI error to wireless sensor networks node localization's precision in pervasive computing environment, individual diversity difference coefficient, distance difference coefficient and distance difference localization equation is defined based on the analysis of the models of maximum likelihood estimation and RSSI. The closest beaconing node to object...
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