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We propose a magnetic field resonance type wireless power transfer system for the Li-ion battery (Lithium-ion battery). The transmitting efficiency is changed by the changing of the charging current to the storage battery. The system places the DC/DC converter at both of the primary and secondary sides. This system suppresses the degradation of transmitting efficiency due to the secondary side load...
Development of distributed power systems with photovoltaic (PV) panels and storage batteries has become very active. Since the generated power by PV panel is unstable, development of an intelligent and efficient charging system is strongly demanded. Also, the distributed systems are optimized by co-operating by each node. Thus, inexpensive and quickly responding PV emulation system is effective to...
This paper discusses an SOC estimation system for lithium ion batteries based on the extended Kalman filter. The accuracy of the estimation is strongly dependent on accuracy of the battery model. We have newly formulated the equivalent circuit model that covers temperature and SOC dependencies. As the result, the error rate of the estimation has been improved significantly. The experimental results...
This study examines the impact of service innovation on business performance in service firms in China. Based on RBV and innovation theories, we construct an integrative model which links service innovation, service quality and business performance together. 277 valid samples were gathered through survey questionnaire in China's tourism sector and structural equation modeling (SEM) approach was employed...
Requirements elicitation, as the first phase of the software life cycle, its importance is becoming more and more prominent. How fast and accurate user requirements can be elicited, is a problem that people wants to solve for a long time. This paper proposes to establish an automated elicitation system based on domain knowledge on user requirements. By gradually perfecting and refining the original...
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