The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Xu Wang - One of the best experts on this subject based on the ideXlab platform.
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dimensionless optimization of piezoelectric vibration energy harvesters with different Interface circuits
Smart Materials and Structures, 2013Co-Authors: Xu WangAbstract:Conversion of mechanical vibration energy into electric energy could provide reliable and efficient energy utilization. Both the harvested resonant power and the energy efficiency have been studied based on a single degree of freedom weak electromechanical coupling piezoelectric vibration energy harvester and normalized in a dimensionless form. Performance optimizations have been conducted for the energy harvester connected with different Interface circuits in terms of normalized harvested resonant power and resonant energy harvesting efficiency to identify both qualitatively and quantitatively the best energy extraction and Storage Interface circuit. Both the dimensionless harvested resonant power and the resonant energy harvesting efficiency formulae have been normalized to contain only two normalized variables of resistance and force factor regardless of the size and excitation magnitude of the energy harvesters.
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Piezoelectric vibration energy harvester - design and prototype
Volume 12: Vibration Acoustics and Wave Propagation, 2012Co-Authors: Bogdan Cojocariu, Anthony Hill, Alejandra Escudero, Han Xiao, Xu WangAbstract:This paper proposes a new approach for vibration energy harvesting analysis. The research investigates and compares efficiencies of a vibration energy harvesting system with two different electric Storage Interface circuits. One of the Interface circuits is the standard Interface circuit comprised of four rectifier diodes connected in a classical single phase bridge. The other Interface circuit is a newly proposed Interface circuit integrated with a voltage multiplier, an impedance converter and an off shelf booster. To validate the effectiveness of the newly proposed Interface circuit, a vibration energy harvesting beam system has been developed in connection with this proposed circuit. The harvested efficiency and harvested power output of the system with the two different electric Storage Interface circuits have been measured and compared.Copyright © 2012 by ASME
David Moreland - One of the best experts on this subject based on the ideXlab platform.
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A Service-Oriented Architecture to enable virtual Storage services: a dynamic collaboration context
International Journal of Ad Hoc and Ubiquitous Computing, 2009Co-Authors: Shiping Chen, Surya Nepal, Jonathan Chan, David MorelandAbstract:A dynamic collaboration, formed by business partners, requires self-contained, secure and reliable Storage for sharing data among collaborating participants. As such this paper presents a virtual Storage services architecture that utilises a Simple Distributed Storage Interface for virtualisation of different physical Storage technologies and capabilities into a pool of logical Storage for collaboration data. An e-health case study, with implementation and performance evaluation, shows the Storage Interface and architecture within the context of a Secure Storage Service, a key management service and a global backup service. The performance evaluation uses various experimental configurations and several commonly used data transport protocols.
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Virtual Storage Services for Dynamic Collaborations
16th IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises (WETICE 2007), 2007Co-Authors: Shiping Chen, Surya Nepal, Jonathan Chan, David MorelandAbstract:Dynamic coalitions formed by business partners who may be competitors but yet still need to co-operate with each other require independent, secure and reliable Storage for exchanging and sharing data among its members. This paper presents a virtual Storage services architecture that addresses these requirements by abstracting physical Storage space in order to provide a pool of logical Storage space using virtualisation technique. The abstraction of a variety of physical Storage technologies and their capabilities is achieved by designing an XML-based simple distributed Storage Interface (SDSI). This paper also presents a case study of a secure distributed Storage service to demonstrate how our architecture offers secure data storing and sharing for dynamic coalitions. We present a summary of our implementation, a Web Services-based prototype Storage system using SDSI, and evaluated its performance against a number of alternative distributed Storage technologies and data transport protocols.
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WETICE - Virtual Storage Services for Dynamic Collaborations
2007Co-Authors: Shiping Chen, Surya Nepal, Jonathan Chan, David MorelandAbstract:Dynamic coalitions formed by business partners who may be competitors but yet still need to co-operate with each other require independent, secure and reliable Storage for exchanging and sharing data among its members. This paper presents a virtual Storage services architecture that addresses these requirements by abstracting physical Storage space in order to provide a pool of logical Storage space using virtualisation technique. The abstraction of a variety of physical Storage technologies and their capabilities is achieved by designing an XML-based simple distributed Storage Interface (SDSI). This paper also presents a case study of a secure distributed Storage service to demonstrate how our architecture offers secure data storing and sharing for dynamic coalitions. We present a summary of our implementation, a Web Services-based prototype Storage system using SDSI, and evaluated its performance against a number of alternative distributed Storage technologies and data transport protocols.
J.l. Bobet - One of the best experts on this subject based on the ideXlab platform.
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Supported metal NPs on magnesium using SCFs for hydrogen Storage: Interface and interphase characterization
The Journal of Supercritical Fluids, 2020Co-Authors: C. Aymonier, A. Denis, Y. Roig, M. Iturbe, E. Sellier, S. Marre, F. Cansell, J.l. BobetAbstract:International audienceMixing catalyst NPs with magnesium was proved to be an efficient way to improve the sorption kinetics of hydrogen. Recently, as an alternative to conventional ball milling process, we have reported the interest of using the supercritical fluid chemical deposition process to deposit catalyst metal NPs on the surface of Mg crystals in order to improve significantly the material cyclability for hydrogen Storage. Through a detailed characterization of the obtained composite nanostructured materials (SEM, XPS, HRTEM), we demonstrate hereafter the creation of a chemical link, through the formation of metallic interphases between the supported metal catalyst NPs and the magnesium particles, explaining potentially the improvements previously reported. Additionally, this work opens new routes towards the development of more complex materials, with a possible control of the Interface between the supported NPs and their support, opening interesting perspectives, for instance in the field of catalysis
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Supported metal NPs on magnesium using SCFs for hydrogen Storage: Interface and interphase characterization
Journal of Supercritical Fluids, 2010Co-Authors: C. Aymonier, A. Denis, Y. Roig, M. Iturbe, E. Sellier, S. Marre, F. Cansell, J.l. BobetAbstract:Abstract Mixing catalyst NPs with magnesium was proved to be an efficient way to improve the sorption kinetics of hydrogen. Recently, as an alternative to conventional ball milling process, we have reported the interest of using the supercritical fluid chemical deposition process to deposit catalyst metal NPs on the surface of Mg crystals in order to improve significantly the material cyclability for hydrogen Storage. Through a detailed characterization of the obtained composite nanostructured materials (SEM, XPS, HRTEM), we demonstrate hereafter the creation of a chemical link, through the formation of metallic interphases between the supported metal catalyst NPs and the magnesium particles, explaining potentially the improvements previously reported. Additionally, this work opens new routes towards the development of more complex materials, with a possible control of the Interface between the supported NPs and their support, opening interesting perspectives, for instance in the field of catalysis.
Yan Xing - One of the best experts on this subject based on the ideXlab platform.
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Bidirectional Three-Phase DC–AC Converter With Embedded DC–DC Converter and Carrier-Based PWM Strategy for Wide Voltage Range Applications
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Jiangfeng Wang, Hongfei Wu, Tianyu Yang, Li Zhang, Yan XingAbstract:A bidirectional three-phase dc-ac converter with embedded dc-dc converter for bidirectional Storage Interface is proposed in this paper. With the help of the embedded dc-dc converter, the voltage of the Storage battery can vary in a wide range. To minimize the power rating and power losses of the embedded dc-dc converter, a simple carrier-based pulsewidth modulation (PWM) strategy with zero-sequence injection is proposed. By adopting the proposed PWM strategy, only a small ratio of total power needs to be processed by the embedded dc-dc converter, while most of the power is only processed by the three-phase dc-ac stage within a single conversion stage. As a result, quasi single-stage power conversion is achieved to improve the conversion efficiency of the overall dc-ac power system. Principles, characteristics, and implementations of the proposed three-phase dc-ac converter and its PWM strategy are analyzed in detail. The feasibility and effectiveness of the proposed solutions are verified with experimental results.
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Performance Evaluation of a Bidirectional Three-Phase DC-AC Converter with Embedded DC-DC Converter and Carrier-Based PWM Strategy
2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018Co-Authors: Hongfei Wu, Jiangfeng Wang, Yan Xing, Peng XuAbstract:A bidirectional three-phase DC-AC converter with an embedded DC-DC converter for Storage Interface is analyzed and evaluated in this paper. With the help of the embedded DC-DC converter, a constant and stable intermittent DC-bus can be provided for the three-phase converter. Different from a conventional two-stage DC-AC converter, only a small ratio of power needs to be processed by the embedded DC-DC converter. Therefore, the conversion stages and power losses of the whole DC-AC converter are reduced. A novel carrier-based (CB) PWM strategy is presented for the proposed bidirectional three-phase DC-AC converter. By injecting a zero-sequence component into the modulation signals, the power processed by the embedded DC-DC converter is minimized. Operation principles, characteristics and implementation of the proposed solution are analyzed in detail. The feasibility and effectiveness of the presented solutions are evaluated with experimental results.
Shiping Chen - One of the best experts on this subject based on the ideXlab platform.
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A Service-Oriented Architecture to enable virtual Storage services: a dynamic collaboration context
International Journal of Ad Hoc and Ubiquitous Computing, 2009Co-Authors: Shiping Chen, Surya Nepal, Jonathan Chan, David MorelandAbstract:A dynamic collaboration, formed by business partners, requires self-contained, secure and reliable Storage for sharing data among collaborating participants. As such this paper presents a virtual Storage services architecture that utilises a Simple Distributed Storage Interface for virtualisation of different physical Storage technologies and capabilities into a pool of logical Storage for collaboration data. An e-health case study, with implementation and performance evaluation, shows the Storage Interface and architecture within the context of a Secure Storage Service, a key management service and a global backup service. The performance evaluation uses various experimental configurations and several commonly used data transport protocols.
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Virtual Storage Services for Dynamic Collaborations
16th IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises (WETICE 2007), 2007Co-Authors: Shiping Chen, Surya Nepal, Jonathan Chan, David MorelandAbstract:Dynamic coalitions formed by business partners who may be competitors but yet still need to co-operate with each other require independent, secure and reliable Storage for exchanging and sharing data among its members. This paper presents a virtual Storage services architecture that addresses these requirements by abstracting physical Storage space in order to provide a pool of logical Storage space using virtualisation technique. The abstraction of a variety of physical Storage technologies and their capabilities is achieved by designing an XML-based simple distributed Storage Interface (SDSI). This paper also presents a case study of a secure distributed Storage service to demonstrate how our architecture offers secure data storing and sharing for dynamic coalitions. We present a summary of our implementation, a Web Services-based prototype Storage system using SDSI, and evaluated its performance against a number of alternative distributed Storage technologies and data transport protocols.
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WETICE - Virtual Storage Services for Dynamic Collaborations
2007Co-Authors: Shiping Chen, Surya Nepal, Jonathan Chan, David MorelandAbstract:Dynamic coalitions formed by business partners who may be competitors but yet still need to co-operate with each other require independent, secure and reliable Storage for exchanging and sharing data among its members. This paper presents a virtual Storage services architecture that addresses these requirements by abstracting physical Storage space in order to provide a pool of logical Storage space using virtualisation technique. The abstraction of a variety of physical Storage technologies and their capabilities is achieved by designing an XML-based simple distributed Storage Interface (SDSI). This paper also presents a case study of a secure distributed Storage service to demonstrate how our architecture offers secure data storing and sharing for dynamic coalitions. We present a summary of our implementation, a Web Services-based prototype Storage system using SDSI, and evaluated its performance against a number of alternative distributed Storage technologies and data transport protocols.
