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Traditional multi-class image classification needs a large number of training samples for building a classifier model. However, it is very time-consuming and costly to obtain labels for a large number of training samples from human experts. Active learning is a feasible solution. This paper proposes a maximum classification optimization method (MCO) for actively selecting unlabeled images to acquire...
An important phenomenon, known as the bullwhip effect, indicates that the variation of orders is amplified as one moves upstream in a supply chain. In this paper, we propose an analytical model to quantify the bullwhip effect by integrating the information sharing and the risk pooling strategies. The developed technique shows that the increase in variability across a three-stage supply chain can be...
A new modeling method for the complicated switching power converter, which is called parameters of differential equations fitting algorithm, is proposed in the paper. The models of the buck converter and boost converter are built using this method, which prove that the method is feasible.
In this paper, the technique of active clamp is applied in ZVT boost converter and forms active clamp ZVT boost converter. This converter is not only simple in topology but also achieves ZVT in both the main switch and the auxiliary switch. The boost diode turns off naturally and there is no reverse recovery loss. Current of the boost inductor flows in bi-direction and the usage rate of the magnetic...
This paper introduces a new topology - parallel resonant converter with multipliers (PRCM), which is a good choice in high voltage applications, such as TWTA power supply. The operating principle of PRCM is analyzed in detail. Design guideline is presented. Then a design example in a TWTA power supply is introduced. At last the conclusion is given
In this paper, PCB planar transformer is introduced. Based on the physical structure, a new model of this kind of planar transformer is presented. The formula to calculate the parameters of the elements in the model is given. Simulating and experimental results validate the model and the calculation methods. Based on these results, the optimization design methods are introduced to reduce the bad influence...
The technique of active clamp is widely applied in single end converters for the perfect performance. In this paper the author combined the active clamp technology with multipliers, and formed the topology of ZVS single end converters with multipliers. The operation principle is analyzed in detail, and the results of computer simulation validate the analysis. At last an experimental example is given
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