DFSM (doubly fed synchronous machine) presents several advantages such as efficiency improvement, weight reduction and increase of the utilization factor (kW/kg). In this paper the authors focus on impact of the D...DFSM (doubly fed synchronous machine) presents several advantages such as efficiency improvement, weight reduction and increase of the utilization factor (kW/kg). In this paper the authors focus on impact of the DFSM on the efficiency and machine weight in comparison to conventional synchronous generator with wound rotor. Different topologies of DFSM are briefly described and the different methods and models for performances prediction are presented.展开更多
基于Holmstrom and Milgrom(1991)的多任务代理理论,本文论证了在经济发展初期,加大对地方政府促进经济增长等容易度量指标的激励,以维持经济持续高速增长,并弱化对地方政府提供基本公共服务等不易考核指标的激励,是给定政治集权体制下...基于Holmstrom and Milgrom(1991)的多任务代理理论,本文论证了在经济发展初期,加大对地方政府促进经济增长等容易度量指标的激励,以维持经济持续高速增长,并弱化对地方政府提供基本公共服务等不易考核指标的激励,是给定政治集权体制下中央政府的最优选择路径。但若持续地采取这种高能激励手段,经济增长将会和居民福利的提高渐行渐远,并将会对未来持续的经济增长造成损害。展开更多
文摘DFSM (doubly fed synchronous machine) presents several advantages such as efficiency improvement, weight reduction and increase of the utilization factor (kW/kg). In this paper the authors focus on impact of the DFSM on the efficiency and machine weight in comparison to conventional synchronous generator with wound rotor. Different topologies of DFSM are briefly described and the different methods and models for performances prediction are presented.
文摘基于Holmstrom and Milgrom(1991)的多任务代理理论,本文论证了在经济发展初期,加大对地方政府促进经济增长等容易度量指标的激励,以维持经济持续高速增长,并弱化对地方政府提供基本公共服务等不易考核指标的激励,是给定政治集权体制下中央政府的最优选择路径。但若持续地采取这种高能激励手段,经济增长将会和居民福利的提高渐行渐远,并将会对未来持续的经济增长造成损害。