动脉粥样硬化血栓栓塞所导致的疾病是世界上最大的致命性杀手.由赛诺菲-安万特集团出资,在全球开展了两项研究CLARITY-TIMI 28(CLopidogrel as Adjunctive ReperfusIon Therapy-Thrombolysis In Myocardial Infarction Study 28)和COMMI...动脉粥样硬化血栓栓塞所导致的疾病是世界上最大的致命性杀手.由赛诺菲-安万特集团出资,在全球开展了两项研究CLARITY-TIMI 28(CLopidogrel as Adjunctive ReperfusIon Therapy-Thrombolysis In Myocardial Infarction Study 28)和COMMIT/CCS-2(C1Opidogrel and Metoprolol in Myocardial Infarction Trial),这项两项重要临床研究结果在2005年3月第54届美国心脏病学会(ACC)年会上公布.应法国赛诺菲-安万特集团中国公司的邀请,著名心血管专家胡大一教授和Braunwald博士2005年3月25日在北京对有关媒体通报ACC年会上发表的CLARITY-TIMI28和COMMIT/CCS-2重要临床研究结果进行通报,结果显示:抗血小板药物氯吡格雷(75mg每日1次)联合标准治疗对于急性心肌梗死(AMI)[(ST段抬高AMI(STE-AMI)]的患者显著有益.两项重大临床研究共包括了近50000名患者.展开更多
The paper summarizes results of the China Energy Modeling Forum's(CEMF)first study.Carbon emissions peaking scenarios,consistent with China's Paris commitment,have been simulated with seven national and indust...The paper summarizes results of the China Energy Modeling Forum's(CEMF)first study.Carbon emissions peaking scenarios,consistent with China's Paris commitment,have been simulated with seven national and industry-level energy models and compared.The CO2 emission trends in the considered scenarios peak from 2015 to 2030 at the level of 9e11 Gt.Sector-level analysis suggests that total emissions pathways before 2030 will be determined mainly by dynamics of emissions in the electric power industry and transportation sector.Both sectors will experience significant increase in demand,but have low-carbon alternative options for development.Based on a side-by-side comparison of modeling input and results,conclusions have been drawn regarding the sources of emissions projections differences,which include data,views on economic perspectives,or models'structure and theoretical framework.Some suggestions have been made regarding energy models'development priorities for further research.展开更多
With the development of e-commerce, digital product has been the main format of multimedia product onthe Internet. At the same time, the problem of copyright protection has gained much attention. Because of the char-a...With the development of e-commerce, digital product has been the main format of multimedia product onthe Internet. At the same time, the problem of copyright protection has gained much attention. Because of the char-acter to be copied easily, the software products such as JPEG or GIF images, applications and documents are beingcopied illegally every day. This does harm to the merchants' benefit. The goal of digital fingerprinting protocol is tostudy a method based on cryptography to trace the source of illegal copy, which in certain conditions can be applied inall kinds of software product. The basic idea of digital fingerprinting, like the fingerprint of human being, is to embedan unique "fingerprint" into each copy of the product sent to the buyer. When finding the illegal copy, the merchantcan trace the source of it, who maybe is a dishonest buyer called traitor, accuse the traitor. So the merchant can pro-tect his copyright. This paper introduces the history of digital fingerprinting protocol and discusses some of the im-portant protocol schemes.展开更多
CPN(Colored Petri Net)是一种面向图形的语言,用来仿真和验证系统,尤其适用于复杂的分布式系统。简单介绍分布式事务处理协议中的两阶段提交协议,提出一种基于CPN的两阶段提交协议建模和分析方法,完整阐述两阶段提交协议的建模过程和...CPN(Colored Petri Net)是一种面向图形的语言,用来仿真和验证系统,尤其适用于复杂的分布式系统。简单介绍分布式事务处理协议中的两阶段提交协议,提出一种基于CPN的两阶段提交协议建模和分析方法,完整阐述两阶段提交协议的建模过程和模型验证方法,清晰直观地分析模型的仿真结果,形象地表现两阶段提交协议的一致性。利用CPN模型对两阶段提交协议性能的分析,为进一步研究两阶段提交协议提供了一种新的手段。展开更多
The increasing integration of variable wind generation has aggravated the imbalance between electricity supply and demand. Power-to-hydrogen(P2H) is a promising solution to balance supply and demand in a variable powe...The increasing integration of variable wind generation has aggravated the imbalance between electricity supply and demand. Power-to-hydrogen(P2H) is a promising solution to balance supply and demand in a variable power grid, in which excess wind power is converted into hydrogen via electrolysis and stored for later use. In this study, an energy hub(EH) with both a P2H facility(electrolyzer) and a gas-to-power(G2P) facility(hydrogen gas turbine) is proposed to accommodate a high penetration of wind power. The EH is modeled and integrated into a security-constrained unit commitment(SCUC) problem, and this optimization problem is solved by a mixed-integer linear programming(MILP) method with the Benders decomposition technique. Case studies are presented to validate the proposed model and elaborate on the technological potential of integrating P2H into a power system with a high level of wind penetration(HWP).展开更多
文摘动脉粥样硬化血栓栓塞所导致的疾病是世界上最大的致命性杀手.由赛诺菲-安万特集团出资,在全球开展了两项研究CLARITY-TIMI 28(CLopidogrel as Adjunctive ReperfusIon Therapy-Thrombolysis In Myocardial Infarction Study 28)和COMMIT/CCS-2(C1Opidogrel and Metoprolol in Myocardial Infarction Trial),这项两项重要临床研究结果在2005年3月第54届美国心脏病学会(ACC)年会上公布.应法国赛诺菲-安万特集团中国公司的邀请,著名心血管专家胡大一教授和Braunwald博士2005年3月25日在北京对有关媒体通报ACC年会上发表的CLARITY-TIMI28和COMMIT/CCS-2重要临床研究结果进行通报,结果显示:抗血小板药物氯吡格雷(75mg每日1次)联合标准治疗对于急性心肌梗死(AMI)[(ST段抬高AMI(STE-AMI)]的患者显著有益.两项重大临床研究共包括了近50000名患者.
文摘The paper summarizes results of the China Energy Modeling Forum's(CEMF)first study.Carbon emissions peaking scenarios,consistent with China's Paris commitment,have been simulated with seven national and industry-level energy models and compared.The CO2 emission trends in the considered scenarios peak from 2015 to 2030 at the level of 9e11 Gt.Sector-level analysis suggests that total emissions pathways before 2030 will be determined mainly by dynamics of emissions in the electric power industry and transportation sector.Both sectors will experience significant increase in demand,but have low-carbon alternative options for development.Based on a side-by-side comparison of modeling input and results,conclusions have been drawn regarding the sources of emissions projections differences,which include data,views on economic perspectives,or models'structure and theoretical framework.Some suggestions have been made regarding energy models'development priorities for further research.
文摘With the development of e-commerce, digital product has been the main format of multimedia product onthe Internet. At the same time, the problem of copyright protection has gained much attention. Because of the char-acter to be copied easily, the software products such as JPEG or GIF images, applications and documents are beingcopied illegally every day. This does harm to the merchants' benefit. The goal of digital fingerprinting protocol is tostudy a method based on cryptography to trace the source of illegal copy, which in certain conditions can be applied inall kinds of software product. The basic idea of digital fingerprinting, like the fingerprint of human being, is to embedan unique "fingerprint" into each copy of the product sent to the buyer. When finding the illegal copy, the merchantcan trace the source of it, who maybe is a dishonest buyer called traitor, accuse the traitor. So the merchant can pro-tect his copyright. This paper introduces the history of digital fingerprinting protocol and discusses some of the im-portant protocol schemes.
文摘CPN(Colored Petri Net)是一种面向图形的语言,用来仿真和验证系统,尤其适用于复杂的分布式系统。简单介绍分布式事务处理协议中的两阶段提交协议,提出一种基于CPN的两阶段提交协议建模和分析方法,完整阐述两阶段提交协议的建模过程和模型验证方法,清晰直观地分析模型的仿真结果,形象地表现两阶段提交协议的一致性。利用CPN模型对两阶段提交协议性能的分析,为进一步研究两阶段提交协议提供了一种新的手段。
基金supported by National Natural Science Foundation of China(No.51377035)NSFC-RCUK_EPSRC(No.51361130153)
文摘The increasing integration of variable wind generation has aggravated the imbalance between electricity supply and demand. Power-to-hydrogen(P2H) is a promising solution to balance supply and demand in a variable power grid, in which excess wind power is converted into hydrogen via electrolysis and stored for later use. In this study, an energy hub(EH) with both a P2H facility(electrolyzer) and a gas-to-power(G2P) facility(hydrogen gas turbine) is proposed to accommodate a high penetration of wind power. The EH is modeled and integrated into a security-constrained unit commitment(SCUC) problem, and this optimization problem is solved by a mixed-integer linear programming(MILP) method with the Benders decomposition technique. Case studies are presented to validate the proposed model and elaborate on the technological potential of integrating P2H into a power system with a high level of wind penetration(HWP).
