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Declining groundwater levels caused by over-exploitation in the middle reaches of the Heihe River basin have raised concerns with respect to the sustainability of the aquifer system. The groundwater depletion in the Daman irrigation district is particularly serious suffering ~20 m drawdown of groundwater level since 1980s. In this paper, a transient groundwater flow model was constructed and calibrated...
Due to restricted dimensions, the two-dimensional structure is not able to simulated one special geometry precisely, such as the asymmetric heater structure, Edge contact and u-trench structures. In this paper, a real 3d numerical model based on the finite element method for phase change random access memory is developed. Study on the phase change by using the heat-transfer equations, Laplace equation...
The snapback effect of amorphous chalcogenide materials has attracted a wide attention. But the mechanism of ovonic threshold switching is still controversial. And two-dimensional model can't simulate device with complicated boundaries. In this paper we developed a three-dimensional numerical model based on trap to band and in-band transition. The simulation results are compared with experimental...
There is a significant interest in the research community to develop large scale, high performance implementations of neuromorphic models. These have the potential to provide significantly stronger information processing capabilities than current computing algorithms. In this paper we present the implementation of five neuromorphic models on a 50 TeraFLOPS 336 node Playstation 3 cluster at the Air...
We present a new optimization-based reconstruction model with geometric feature-preserving regularization. The previous construction approach of optimization-based requires generally solving a tremendously large discrete linear system. In addition, the analytic algorithms, such as, back-projection related methods, Fourier transform based reconstruction algorithms, are sensitive to noise. These disadvantages...
In this paper, we introduce a method to estimate the object's pose from multiple video cameras. We derive a centralized solution to pose estimation from multiple video cameras by solving a general matrix equation. Moreover, we provide an equivalent distributed solution to the pose estimation problem based on the independent pose estimation obtained from each camera. We demonstrate that both methods...
Multi-motor synchronous system is being widely applied in industrial field, in order to ulteriorly improve synchronous performance of multi-motor system, this paper presents a synchronous control system for three-motor which includes three intelligent PID controllers based on BP neural network arithmetic which adjusts the parameters of PID controllers on-line, and neuron decoupling compensator fulfilling...
Taking the multi-variable of synchronization system of the AC induction motors as study object, focusing on the system of induction motors powered by current-tract SPWM transducers, the mathematical model of the system of two motors is established. Combining decoupling technology of adaptive neuron decoupling compensator, RBF neural network adaptive PID controller is adopted to design the neural network...
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