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This paper presents a novel structure of high step-up DC/DC converters intended for distributed generation systems such as fuel cells and photovoltaic (PV) systems. Proposed topologies integrate the classical Y-source impedance network with different step-up cells to acquire strong boost ability which is unmatched by existing impedance networks. Compared to Y-source, proposed converters reserve versatile...
This paper proposes a dynamic wireless power transfer system with parallel transmitters for electric vehicles. The transmitter consists of two DD type coils which connect with one inverter in parallel. To overcome the power-null phenomenon, one additional rectangular coil named Q coil is added into the DD type receiver, composing the DDQ type receiver. One big challenge in dynamic wireless power transfer...
As the application of electric vehicles expands, their charging power demand will influence the operation of the power grid. This paper firstly considers the relevant factors which influence the charging power demand; by using the Monte Carlo method to calculate the large-scale electric vehicle charging power demand. Based on the problem that the large-scale electric vehicle's disordered charging...
How to develop a digitizing information system of performance appraisal for administrative staff in university is an urgent problem in university management. According to the target and characteristics of performance appraisal for administrative staffs, this paper have designed an Employee Performance Assesses Management Information System for administrative staffs in university(EPAMIS) base on the...
When we study on the research teaching through implementation of network teaching platform we found the absence of learning effect on the feedback. In order to solve the problem, this paper design and implementation of a research network teaching platform based on intelligent evaluation of learning outcomes (RBLMS). This platform could provide basis for decision making for teachers when they implement...
Traditional approach for exception handling has no good reusability and scalability, the source code will be changed when faced with unpredictable exception handling. Based on reflection and XML configuration technology, an extensible framework for application exception handling is presented in this paper, experiment indicates an encouraging effect in case of unpredictable exception handling compared...
To improve the accuracy of measurement and response speed, a phase-sensitive detection (PSD) theory based micro-capacitance detect circuit is designed. In the front of circuit, the DDS chip generate a sinusoidal signal to excite the capacitor under test, the measured signal and reference signal enter into phase-sensitive detector after the capacitance/voltage convertion. After lock-in amplify and...
Team learning is a driving force for the continuous development of enterprises, and it is becoming a hot topic in recent years. In this paper, we use the Multi-Team System Theory (MTS) to explore how multi-team learning from multi-dimensional, multi-view, and multi-objective in different levels. Meanwhile, we put forward a multi-team learning model based on the analysis of how knowledge flows in MTS...
With the increasing scale and complexity of modern project, project schedule management are influenced by lots of factors, such as delays and reworks. They also increase project schedule risk. Tradition project management methods can not guarantee project performance because they don't consider integrity, dynamism and nonlinearity of project. On basis of analyzing the project process flow, the paper...
This work reports, high electron mobility transistors (HEMTs) using a dilute antimony In0.2Ga0.8AsSb channel, grown by molecular beam epitaxy (MBE) system. Introducing the surfactant-like Sb atoms during growth of the InGaAs/GaAs quantum well (QW) was devised to effectively improve the channel confinement capability and the interfacial quality within the InGaAsSb/GaAs QW heterostructure, resulting...
Traditional planar shape representations cannot efficiently solve some problems such as recognition under occlusion, reconstruction and partial matching. In this paper, an improved shape representation by the extraction of contour curvature is presented based on the invariance of curvature. Then the invariance and discrete approximation solution are demonstrated. Finally the reconstruction method...
This work reports an accurate, reliable, and systematic method to extract the small-signal equivalent-circuit elements of the high electron mobility transistor (HEMT) models by integrating the generic algorithm (GA) analyses. Superior extraction accuracy of 95% over the entire operation frequency range has been achieved. Different from the strong dependence on the starting value of parameter search...
This work provides comprehensive comparisons of the device characteristics, including the voltage gain, power performance, linearity, and noise characteristics, for the InAlAs/InGaAs/GaAs metamorphic high electron mobility transistors with respect to different indium contents in the InGaAs channel. The kink effects in high In-ratio InGaAs channel were found to seriously degrade the device performance...
This letter reports, for the first time, a high-electron mobility transistor (HEMT) using a dilute antimony In0.2Ga0.8 AsSb channel, which is grown by a molecular-beam epitaxy system. The interfacial quality within the InGaAsSb/GaAs quantum well of the HEMT device was effectively improved by introducing the surfactantlike Sb atoms during the growth of the InGaAs layer. The improved heterostructural...
An algorithm based on non-linear interior point methods is developed for the point-to-point FTR obligations auction problem in the case of the full AC network model. The bid quantities for FTR auction are introduced into the model as controllable variables and then a new augmented Hessian matrix is formed. Except for adding the dual and slack variables corresponding to FTR to the diagonal, the modifications...
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