The Experts below are selected from a list of 164934 Experts worldwide ranked by ideXlab platform
Michael Wang - One of the best experts on this subject based on the ideXlab platform.
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vehicle use intensity in china current status and Future Trend
Energy Policy, 2012Co-Authors: Qiang Zhang, Kebin He, Michael WangAbstract:Vehicle-use intensity (kilometers traveled per vehicle per year or VKT) is important because it directly affects simulation results for vehicle fuel use and emissions, but the poor understanding of VKT in China could significantly affect the accuracy of estimation of total fuel use and CO2 emissions, and thus impair precise evaluation of the effects of associated energy and environmental policies. As an important component of our work on the Fuel Economy and Environmental Impacts (FEEI) model, we collected VKT survey data in China from available sources and conducted additional surveys during 2004 and 2010, from which we derived VKT values and VKT-age functions by vehicle type for China. We also projected the Future VKT for China by examining the relationship of vehicle use to per-capita GDP in 20 other countries worldwide. The purpose of this work is to achieve a better understanding of vehicle-use intensity in China and to generate reliable VKT input (current and Future VKT levels) for the FEEI model. The VKT results obtained from this work could also benefit other work in the field associated with vehicle energy use and emissions.
Alexander M. Seifalian - One of the best experts on this subject based on the ideXlab platform.
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Intracranial Stents Past, Present and the Future Trend: Stents Made with Nano-particle or Nanocomposite Biomaterials
Current medicinal chemistry, 2014Co-Authors: Junjie Zhao, Deepak M. Kalaskar, Yasmin Farhatnia, Xiaoxin Bai, Peter E.m. Bulter, Alexander M. SeifalianAbstract:Stroke or cerebral vascular accidents are among the leading causes of death in the world. With the availability of Digital Subtraction Angiography, transluminal angioplasty has become feasible in many situations and the role of intracranial stents is becoming ever more important in the management of cerebral vascular diseases. In current review, we outline the chronological development of various stents namely; balloon expandable stent, self-expandable open cell stent, self-expandable close cell stent and the flow diverting stent. Further we discuss their advantages and limitations in terms of stent migration, thromboemboli, damage to vessels during procedure, in-stent stenosis and hyper-perfusion damage. We also discuss the importance of in-situ endothelialization, controlled expandability and hemodynamic manipulation in stent design. Further, we summarized the role and need for further development in the areas of bio-compatible materials, endothelial progenitor cell capture technique, bio-functionalized-magnetic-nano-particles and nanotechnology which are significant in intracranial stent development.
Injazz J Chen - One of the best experts on this subject based on the ideXlab platform.
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planning for erp systems analysis and Future Trend
Business Process Management Journal, 2001Co-Authors: Injazz J ChenAbstract:The successful implementation of various enterprise resource planning (ERP) systems has provoked considerable interest over the last few years. Management has recently been enticed to look toward these new information technologies and philosophies of manufacturing for the key to survival or competitive edges. Although there is no shortage of glowing reports on the success of ERP installations, many companies have tossed millions of dollars in this direction with little to show for it. Since many of the ERP failures today can be attributed to inadequate planning prior to installation, we choose to analyze several critical planning issues including needs assessment and choosing a right ERP system, matching business process with the ERP system, understanding the organizational requirements, and economic and strategic justification. In addition, this study also identifies new windows of opportunity as well as challenges facing companies today as enterprise systems continue to evolve and expand.
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planning for erp systems analysis and Future Trend
Business Process Management Journal, 2001Co-Authors: Injazz J ChenAbstract:The successful implementation of various enterprise resource planning (ERP) systems has provoked considerable interest over the last few years. Management has recently been enticed to look toward these new information technologies and philosophies of manufacturing for the key to survival or competitive edges. Although there is no shortage of glowing reports on the success of ERP installations, many companies have tossed millions of dollars in this direction with little to show for it. Since many of the ERP failures today can be attributed to inadequate planning prior to installation, we choose to analyze several critical planning issues including needs assessment and choosing a right ERP system, matching business process with the ERP system, understanding the organizational requirements, and economic and strategic justification. In addition, this study also identifies new windows of opportunity as well as challenges facing companies today as enterprise systems continue to evolve and expand.
Qiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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vehicle use intensity in china current status and Future Trend
Energy Policy, 2012Co-Authors: Qiang Zhang, Kebin He, Michael WangAbstract:Vehicle-use intensity (kilometers traveled per vehicle per year or VKT) is important because it directly affects simulation results for vehicle fuel use and emissions, but the poor understanding of VKT in China could significantly affect the accuracy of estimation of total fuel use and CO2 emissions, and thus impair precise evaluation of the effects of associated energy and environmental policies. As an important component of our work on the Fuel Economy and Environmental Impacts (FEEI) model, we collected VKT survey data in China from available sources and conducted additional surveys during 2004 and 2010, from which we derived VKT values and VKT-age functions by vehicle type for China. We also projected the Future VKT for China by examining the relationship of vehicle use to per-capita GDP in 20 other countries worldwide. The purpose of this work is to achieve a better understanding of vehicle-use intensity in China and to generate reliable VKT input (current and Future VKT levels) for the FEEI model. The VKT results obtained from this work could also benefit other work in the field associated with vehicle energy use and emissions.
Rik W De Doncker - One of the best experts on this subject based on the ideXlab platform.
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innovative and reliable power modules a Future Trend and evolution of technologies
IEEE Industrial Electronics Magazine, 2014Co-Authors: Christoph Neeb, Lars Boettcher, Marcus Conrad, Rik W De DonckerAbstract:Since the introduction of the first power module by Semikron in 1975, many innovations have been made to improve the thermal, electrical, and mechanical performance of power modules. These innovations in packaging technology focus on the enhancement of the heat dissipation and thermal cycling capability of the modules. Thermal cycles, caused by varying load and environmental operating conditions, induce high mechanical stress in the interconnection layers of the power module due to the different coefficients of thermal expansion (CTE), leading to fatigue and growth of microcracks in the bonding materials. As a result, the lifetime of power modules can be severely limited in practical applications. Furthermore, to reduce the size and weight of converters, the semiconductors are being operated at higher junction temperatures. Higher temperatures are especially of great interest for use of wide-?bandgap materials, such as SiC and GaN, because these materials leverage their material characteristics, particularly at higher temperatures. To satisfy these tightened requirements, on the one hand, conventional power modules, i.e., direct bonded Cu (DBC)-based systems with bond wire contacts, have been further improved. On the other hand, alternative packaging techniques, e.g., chip embedding into printed circuit boards (PCBs) and power module packaging based on the selective laser melting (SLM) technique, have been developed, which might constitute an alternative to conventional power modules in certain applications.
