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The power/signal synchronous transmission between converters has attracted much attention since no extra independent signal transmitting equipment is required. In this paper, bifurcation behaviors of a cascaded two-stage Buck-Boost converter are discussed by simplifying the second stage boost converter as constant power load. The amplitude variation of the bus voltage caused by bifurcation is used...
Based on the analysis of the SRG power generation system, a zero-input current ripple QBC with coupled inductor was designed to solve the problem about the large ripple of output voltage and the influence of current ripple on the load in case of endangering the operation of sensitive load, which can realize zero-input current ripple and zero-output voltage ripple by allocating parameters(turn ratio,...
The poor viability of transplanted stem cells hampers their therapeutic efficacy for treatment of myocardial infarction. The aim of this study was to investigate whether rosuvastatin improved survival of adipose-derived mesenchymal stem cells (AD-MSCs) after transplantation into infarcted hearts. AD-MSCs isolated from Tg(Fluc-egfp) mice which constitutively express both firefly luciferase (Fluc) and...
In recent years, environmental problems and energy problems have been increasingly serious. And reducing emissions of CO2 is required. Research of hybrid and electrical vehicles became one of the top targets. These cars need power devices such as inverter to control electric power. Since operating temperature of an Si power device is about 150°C, a big cooling system is needed to control the module's...
High-temperature power devices using SiC as a semiconductor have attracted attention. The author's group had proposed a new packaging structure for the use of SiC power devices. The pure Al board and Ag-nano layer to age mount SiC chip was adopted in this new structure. In addition, Ni-plating was applied on the pure Al board. However, as a result of temperature cycling tests, there appeared cracks...
Session segmentation can not only facilitate further study of users' interest mining but also act as the foundation of other retrieval researches based on users' complicated search behaviors. This paper proposes session boundary discrimination model (the binary classification tree) utilizing time interval and query likelihood on the basis of COBWEB. The model has prominently improved recall ratio,...
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