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In electromagnetic welding process, electromagnetic forming technology can be used to form sheet metal into shape. The physics of electromagnetic forming process are quite the same as for electromagnetic welding, until the point the contact of the two sheets, after which they are either formed against each other or joined, creating a solid state joint. The contact modeling is presented to obtain normal...
In the case of III–V dilute magnetic semiconductors (DMSs), the holes from Mn doping are known to mediate the ferromagnetic interaction. We firstly demonstrated the organic molecular manipulation of the magnetism of (Ga,Mn)As. Mn-doped GaAs thin films with various thicknesses were grown by low-temperature molecular-beam epitaxy, and organic charge-transfer molecules were deposited on the surface of...
We firstly demonstrated the organic molecular manipulation of the magnetism of (Ga, Mn)As. Mn-doped GaAs thin films with various thicknesses were grown by low-temperature molecular-beam epitaxy (LT-MBE), and organic charge-transfer molecules were deposited on the surface of (Ga, Mn)As films by either solution-based self-assembly or vacuum thermal evaporation, which led to large carrier density modulation,...
In this paper, we focus on the problem of H-infinity control for a class of nonlinear systems described by the Takagi-Sugeno (T-S ) fuzzy descriptor model with multiple time delays and disturbance. The descriptor type of Lyapunov-Krasovskii functional is employed to analyze the H-infinity stability, then a state feedback H-infinity controller is determined, which ensures that the closed system is...
The DC bus voltage is the main criteria to reflect whether the converter system is working properly or not. When grid voltage drops, the stability control of the DC bus voltage is the key to ensure that wind power generators not take off the grid. This paper had done a research on direct-drive wind power system and proposed a coordinated control method combining the crowbar circuit with sliding mode...
Distribution network reconfiguration is a complex, large-scale and nonlinear combinatorial optimization problem. In order to solve this problem, a new method based on harmony search (HS) algorithm and genetic algorithm (GA) is proposed. The HS algorithm is a recently developed meta-heuristic algorithm, and has been very successful in a wide variety of optimization problems. Refresh strategy of solution...
Learning from social network is one important way of entrepreneurs' informal learning. The objective of this study investigates how trust affects entrepreneur's exploitative learning and explorative learning when entrepreneurs learn from social network. Based on a sample of 129 entrepreneurs of small and medium-sized firms from the TaiZhou urban area and economic development zone, results reveal that...
For a typical video conference system, generally it is required to satisfy some basic requirements such as real-time and security. In the past few years, a large number of investigators concentrate on how to develop efficient video encryption algorithms, which are mainly fell into three categories: complete encryption, selective encryption, and entropy coding based encryption. Among above three kinds...
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