新一代宽禁带半导体材料由于具有优异的潜在材料性能，在功率器件中得到了广泛应用，十几年来一直是电力电子领域的研发热点。其中碳化硅（S i C）功率器件的技术成熟度最高，几年前率先进入实用商品化阶段后，保持了较高的增长势头，...新一代宽禁带半导体材料由于具有优异的潜在材料性能，在功率器件中得到了广泛应用，十几年来一直是电力电子领域的研发热点。其中碳化硅（S i C）功率器件的技术成熟度最高，几年前率先进入实用商品化阶段后，保持了较高的增长势头，吸引了产业界很多关注。相关新能源技术和产业（包括太阳能、风电、混合及纯电动汽车等）的发展更加速了SiC功率器件产业的成长。市场预测，该行业在今后的几年中将保持高达38%的年增长率[1]。展开更多
In order to improve the scalability and reliability of Software Defined Networking(SDN),many studies use multiple controllers to constitute logically centralized control plane to provide load balancing and fail over.I...In order to improve the scalability and reliability of Software Defined Networking(SDN),many studies use multiple controllers to constitute logically centralized control plane to provide load balancing and fail over.In this paper,we develop a flexible dormant multi-controller model based on the centralized multi-controller architecture.The dormant multi-controller model allows part of controllers to enter the dormant state under light traffic condition for saving system cost.Meanwhile,through queueing analysis,various performance measures of the system can be obtained.Moreover,we analyze the real traffic of China Education Network and use the results as the parameters of computer simulation and verify the effects of parameters on the system characteristics.Finally,a total expected cost function is established,and genetic algorithm is employed to find the optimal values of various parameters to minimize system cost for the deployment decision making.展开更多
文摘新一代宽禁带半导体材料由于具有优异的潜在材料性能，在功率器件中得到了广泛应用，十几年来一直是电力电子领域的研发热点。其中碳化硅（S i C）功率器件的技术成熟度最高，几年前率先进入实用商品化阶段后，保持了较高的增长势头，吸引了产业界很多关注。相关新能源技术和产业（包括太阳能、风电、混合及纯电动汽车等）的发展更加速了SiC功率器件产业的成长。市场预测，该行业在今后的几年中将保持高达38%的年增长率[1]。
基金the National High-tech R&D Program ("863" Program) of China，the National Science Foundation of China，National Science & Technology Pillar Program of China，the National Science Foundation of China，the Post-Doctoral Funding of China，Tsinghua-Huawei joint research project
文摘In order to improve the scalability and reliability of Software Defined Networking(SDN),many studies use multiple controllers to constitute logically centralized control plane to provide load balancing and fail over.In this paper,we develop a flexible dormant multi-controller model based on the centralized multi-controller architecture.The dormant multi-controller model allows part of controllers to enter the dormant state under light traffic condition for saving system cost.Meanwhile,through queueing analysis,various performance measures of the system can be obtained.Moreover,we analyze the real traffic of China Education Network and use the results as the parameters of computer simulation and verify the effects of parameters on the system characteristics.Finally,a total expected cost function is established,and genetic algorithm is employed to find the optimal values of various parameters to minimize system cost for the deployment decision making.
