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Hybrid methods of fuzzy clustering and particle swarm optimization (PSO) are important techniques for image segmentation. The spatial credibilistic clustering (SCC) shows better performance than traditional fuzzy clustering, because of the “typicality” represented by credibility memberships degree is much more accurate than the “sharing” represented by probability membership degree to characterize...
In this work, an algorithm for coupling external circuit elements to electromagnetic (EM) particle-in-cell (PIC) simulations is developed. The circuit equation including an external voltage or current source, resistance, inductance, capacitance, and a dynamic load is solved simultaneously with the EM PIC updaters through an instant measured voltage across the system to obtain the supplied current...
In this work, an algorithm for coupling external circuit elements to EM PIC simulations is developed. The circuit equation including an external voltage or current source, resistance, inductance, capacitance, and a dynamic load is solved simultaneously with the EM PIC updaters through an instant measured voltage V across the system to obtain the supplied current I for feeding into the system. This...
In general, the operating characteristics of RF vacuum electronic or plasma devices are affected by the power supply, e.g., a pushing effect on the oscillating frequency of a magnetron by a supplied anode current. The external impedance connected to the system under study should be included in the electromagnetic (EM) particle-in-cell (PIC) simulations especially when the system is in a transient...
The touch-down test is widely used to calibrate the flying-height (FH) of sliders by gently contacting the disk with the thermal protrusion of thermal FH control (TFC) sliders. However, the dynamic instability of TFC slider during the touch-down process may significantly affect the contact detection and the FH calibration, and therefore, hinders further reduction of the FH of TFC sliders. This paper...
In order to analysis models of fault management systems in power plants, a method combining software engineering techniques and DEDS (discrete event dynamic system, DEDS) models was put forward in this paper. Fault detection system was proposed as an example to set up models. Firstly, the UML charts and corresponding Petri nets were founded. Then, in order to optimize the model, reduction rules were...
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