A new type of vibrating centrifuge with wider frequency range is designed instead of the traditional one with a single frequency to improve the vibrating effect. With the aid of a new dynamical model, one simulation w...A new type of vibrating centrifuge with wider frequency range is designed instead of the traditional one with a single frequency to improve the vibrating effect. With the aid of a new dynamical model, one simulation without considering the visco-elasticity of basis is presented, then the dynamical responses of time and frequency in different scheme are given. The computational results show that the improved vibrating centrifuge possesses a remarkably widened frequency range.展开更多
China and Russia are two countries of important consequences in the world, which are also amicable neighboring countries. In recent years, not only good neighboring amity between the two countries has been developed a...China and Russia are two countries of important consequences in the world, which are also amicable neighboring countries. In recent years, not only good neighboring amity between the two countries has been developed and consolidated in politics, but also an historic significant step has been reached in aspect of economic cooperation.展开更多
Wu Yue, a lung transplant recipi ent. now regards August 31, the day she underwent surgery, as her re-birth day. In the eyes＇ of many people, the 30-year- old woman is an embodiment of love, dili gence and intelligence.
This year marks the 30th anniversary of the establishment of the Hainan Special Economic Zone and its designation as a Chinese province.Hainan’s progress over the past three decades has been a microcosm of the achiev...This year marks the 30th anniversary of the establishment of the Hainan Special Economic Zone and its designation as a Chinese province.Hainan’s progress over the past three decades has been a microcosm of the achievements of China’s reform and opening-up drive.展开更多
Ⅰ. The Status-quo of Product Development Capability In DFM The departments for auto development at two levels have been built up, i.e., DFM’s headquarters has established its technical center——Dongfeng Automotive ...Ⅰ. The Status-quo of Product Development Capability In DFM The departments for auto development at two levels have been built up, i.e., DFM’s headquarters has established its technical center——Dongfeng Automotive Engineering Institute (DFAEI), Material & Manufacturing展开更多
交通基础设施对城市经济发展具有强大的推动作用,尤其是大型交通基础设施的建设,对土地利用和空间形态产生重大影响。针对城市交通基础设施广义经济效益评估分析需求,本文提出基于城市经济-土地利用-交通整体规划(Urban-Integrated Econ...交通基础设施对城市经济发展具有强大的推动作用,尤其是大型交通基础设施的建设,对土地利用和空间形态产生重大影响。针对城市交通基础设施广义经济效益评估分析需求,本文提出基于城市经济-土地利用-交通整体规划(Urban-Integrated Economy, Land Use, and Transport, U-IELUT)建模的交通基础设施广义经济效益评估框架和方法。在传统“四阶段”交通规划模型的基础上,加入城市经济和人口预测、社会经济活动空间分配、城市空间开发,以及交通基础设施广义经济效益评估模块,构建面向交通基础设施广义经济效益评估的“PECAS+(Production, Exchange and Consumption Allocation System)”广义经济效益评估模型。以武汉地铁2号线为例,基于武汉“PECAS+”广义经济效益评估模型测算其直接经济效益和广义经济效益。结果表明,地铁2号线在2027年的直接经济效益约为10.43亿元;广义经济效益中,动态集聚效益约为2.64亿元,约为直接经济效益的25.3%,说明广义经济效益尤其是集聚效益等带来的经济效益不可忽略。同时,还探明交通基础设施建设对不同小区的影响差异,即广义经济效益的空间分布,可为交通基础设施投资建设提供多维度决策支持。展开更多
在网格环境中,多数节点希望能够更多地使用其他节点的资源,而不愿共享本地的资源.每个理性的用户在追求自身利益最大化的同时,严重影响了协作整体的运行效率.在实际应用中,要吸引资源的拥有者加入资源协作,就必须保证其利益和安全.讨论...在网格环境中,多数节点希望能够更多地使用其他节点的资源,而不愿共享本地的资源.每个理性的用户在追求自身利益最大化的同时,严重影响了协作整体的运行效率.在实际应用中,要吸引资源的拥有者加入资源协作,就必须保证其利益和安全.讨论了资源激励机制和分配机制之间的依赖与制约关系,从经济、信任角度提出自适应的信任-激励相容的资源分配机制.在网格环境中,资源供需的变化会引发价格的浮动,基于经济学的一般均衡理论,给出了资源提供者的动态价格调整策略.提供者可根据当前资源的供需和负载状况,制定自适应的信任-激励相容的分配策略ATIM(adaptive trust-incentive compatible resource allocation),遵循多贡献多分配的原则,激励节点共享出有价值的资源,最大化资源的聚合效用.在CROWN(China research and development environment over wider-area network)平台中评估了ATIM机制的效率和性能.展开更多
基金This project is supported by Provincial Natural Science Foundation of Shanxi,China(No.2005A06)Xi'an Jiaotong University Natural Science Foundation of China(No.2003025).
文摘A new type of vibrating centrifuge with wider frequency range is designed instead of the traditional one with a single frequency to improve the vibrating effect. With the aid of a new dynamical model, one simulation without considering the visco-elasticity of basis is presented, then the dynamical responses of time and frequency in different scheme are given. The computational results show that the improved vibrating centrifuge possesses a remarkably widened frequency range.
文摘China and Russia are two countries of important consequences in the world, which are also amicable neighboring countries. In recent years, not only good neighboring amity between the two countries has been developed and consolidated in politics, but also an historic significant step has been reached in aspect of economic cooperation.
文摘Wu Yue, a lung transplant recipi ent. now regards August 31, the day she underwent surgery, as her re-birth day. In the eyes＇ of many people, the 30-year- old woman is an embodiment of love, dili gence and intelligence.
文摘This year marks the 30th anniversary of the establishment of the Hainan Special Economic Zone and its designation as a Chinese province.Hainan’s progress over the past three decades has been a microcosm of the achievements of China’s reform and opening-up drive.
文摘Ⅰ. The Status-quo of Product Development Capability In DFM The departments for auto development at two levels have been built up, i.e., DFM’s headquarters has established its technical center——Dongfeng Automotive Engineering Institute (DFAEI), Material & Manufacturing
文摘交通基础设施对城市经济发展具有强大的推动作用,尤其是大型交通基础设施的建设,对土地利用和空间形态产生重大影响。针对城市交通基础设施广义经济效益评估分析需求,本文提出基于城市经济-土地利用-交通整体规划(Urban-Integrated Economy, Land Use, and Transport, U-IELUT)建模的交通基础设施广义经济效益评估框架和方法。在传统“四阶段”交通规划模型的基础上,加入城市经济和人口预测、社会经济活动空间分配、城市空间开发,以及交通基础设施广义经济效益评估模块,构建面向交通基础设施广义经济效益评估的“PECAS+(Production, Exchange and Consumption Allocation System)”广义经济效益评估模型。以武汉地铁2号线为例,基于武汉“PECAS+”广义经济效益评估模型测算其直接经济效益和广义经济效益。结果表明,地铁2号线在2027年的直接经济效益约为10.43亿元;广义经济效益中,动态集聚效益约为2.64亿元,约为直接经济效益的25.3%,说明广义经济效益尤其是集聚效益等带来的经济效益不可忽略。同时,还探明交通基础设施建设对不同小区的影响差异,即广义经济效益的空间分布,可为交通基础设施投资建设提供多维度决策支持。
文摘在网格环境中,多数节点希望能够更多地使用其他节点的资源,而不愿共享本地的资源.每个理性的用户在追求自身利益最大化的同时,严重影响了协作整体的运行效率.在实际应用中,要吸引资源的拥有者加入资源协作,就必须保证其利益和安全.讨论了资源激励机制和分配机制之间的依赖与制约关系,从经济、信任角度提出自适应的信任-激励相容的资源分配机制.在网格环境中,资源供需的变化会引发价格的浮动,基于经济学的一般均衡理论,给出了资源提供者的动态价格调整策略.提供者可根据当前资源的供需和负载状况,制定自适应的信任-激励相容的分配策略ATIM(adaptive trust-incentive compatible resource allocation),遵循多贡献多分配的原则,激励节点共享出有价值的资源,最大化资源的聚合效用.在CROWN(China research and development environment over wider-area network)平台中评估了ATIM机制的效率和性能.
