This paper analyses the author's escapism In this Composed Upon Westminster Bridge, Sept. 3, 1802 ,and conclusion is reached that the poet wrote this particular poem for his beloved sister. And the sister 's c...This paper analyses the author's escapism In this Composed Upon Westminster Bridge, Sept. 3, 1802 ,and conclusion is reached that the poet wrote this particular poem for his beloved sister. And the sister 's calmness and complacency came to be the best pill to heal the wounds of the poet.展开更多
A comprehensive mission sensitivity analysis index based on Sobol's index called global mission sensitivity( GMS) was proposed in this paper which focused on analyzing the mission sensitivity of components of phas...A comprehensive mission sensitivity analysis index based on Sobol's index called global mission sensitivity( GMS) was proposed in this paper which focused on analyzing the mission sensitivity of components of phased mission systems( PMS). The simulation strategy of GMS based on a Petri net and Monte Carlo method was presented which had broad applicability. Finally,the GMS and Birnbaum's sensitivity of components in a PMS example were compared. The GMS of component is demonstrated to be more adaptable to reflect the component mission sensitivity when the rated reliability parameters of components cannot be obtained, and components have state dependency or the system is subjected to common cause failure.展开更多
China’s first Mars exploration mission is scheduled to be launched in 2020.It aims not only to conduct global and comprehensive exploration of Mars by use of an orbiter but also to carry out in situ observation of ke...China’s first Mars exploration mission is scheduled to be launched in 2020.It aims not only to conduct global and comprehensive exploration of Mars by use of an orbiter but also to carry out in situ observation of key sites on Mars with a rover.This mission focuses on the following studies:topography,geomorphology,geological structure,soil characteristics,water-ice distribution,material composition,atmosphere and ionosphere,surface climate,environmental characteristics,Mars internal structure,and Martian magnetic field.It is comprised of an orbiter,a lander,and a rover equipped with 13 scientific payloads.This article will give an introduction to the mission including mission plan,scientific objectives,scientific payloads,and its recent development progress.展开更多
This article describes practical preparation of marine engineers on the full mission simulator complex of the ship＇s automated electrical power plant. A full mission simulator complex of the ship＇s automated power m...This article describes practical preparation of marine engineers on the full mission simulator complex of the ship＇s automated electrical power plant. A full mission simulator complex of the ship＇s automated power management system meets International Convention STCW （Standards of Training, Certification and Watchkeeping） 78 （with Manila amendments 2010） requirements in part of adequate reproduction of its operational modes corresponding to the actual configuration and layout of the ship＇s automated power management system with real consumers and typical loads. The simulator is fully consistent with the goals and objectives of the practical training, as well as the goals and objectives of proficiency testing engine department officers on issues of technical maintenance of real ship＇s equipment （high voltage installations included） and means of automation. The simulator＇s complex is designed for training and proficiency testing of cadets and students of maritime educational institutions, as well as training and proficiency testing of marine specialists （mechanics and electricians） by watch-keeping and maintenance of modem integrated automated control systems of ship＇s electric power plant and the individual ship electromechanical systems, including high-voltage systems. A simulator＇s complex provides adequate reproduction of operational situations on technical side of real ship electric and automation equipment provides training on monitoring, control and management diesel-generator sets in hand, semi-automatic and automatic modes of power station, control and management of electromechanical systems, as well as the set of tasks upon parameterization, visualization and etc. Besides number of combinations of monitoring, control and management tasks, the simulator＇s complex provides an opportunity to simulate various practical fault conditions. It allows students to focus on the work of automatic control system in emergency situations and to work out correct actions for a watch-keeper on searching, localizing of faults and troubleshooting of equipment.展开更多
Spring is a vibrant and thriving season when everything looks fresh and new.In such a moment full of hope,I would like to give my best wishes to all the readers of International Understanding on behalf of CAFIU."...Spring is a vibrant and thriving season when everything looks fresh and new.In such a moment full of hope,I would like to give my best wishes to all the readers of International Understanding on behalf of CAFIU."The relationship between two countries relies on the friendly sentiments between their peoples".The friendly relationship between two countries is,in the final analysis,decided by the friendship between the two peoples.展开更多
Recently, we interviewed Cewang Jigmei, President of the Tibet Academy of Social Sciences, on the efforts Tibet has made to save King Gesar.QUESTION: The 31st UNESCO Session held in Paris in October 2001 decided unani...Recently, we interviewed Cewang Jigmei, President of the Tibet Academy of Social Sciences, on the efforts Tibet has made to save King Gesar.QUESTION: The 31st UNESCO Session held in Paris in October 2001 decided unanimously to include activities to celebrate the millennium anniversary of King Gesar in the list of projects undertaken with UNESCO involvement in 2002-2003. Could you please tell me your views on this?ANSWER: This shows the international recognition of, and appreciation for, the展开更多
为了适应未来航天任务的发展,构建以服务为导向的、开放的、可重用的航天器任务操作系统,分析了CCSDS(Consultative Committee for Space Data Systems,空间数据系统咨询委员会)中MOIMS(Mission Operations and Information Management ...为了适应未来航天任务的发展,构建以服务为导向的、开放的、可重用的航天器任务操作系统,分析了CCSDS(Consultative Committee for Space Data Systems,空间数据系统咨询委员会)中MOIMS(Mission Operations and Information Management System,任务操作及信息管理系统)领域的任务操作服务框架的原理、层次结构及优点,对任务操作相关的通用服务、功能服务、COM(Common Object Model,通用对象模型)及MAL(Message Abstraction Layer,消息抽象层)对服务的抽象化描述方法进行了研究。MAL向任务操作相关的服务提供了通用的服务模型框架,所有服务均可用MAL消息格式进行规范化的描述,在此基础上建立了MAL消息格式与CCSDS空间包的映射关系,从而以CCSDS空间包为信息载体实现了航天器与地面系统间的任务操作通信,可以作为以服务为导向的任务操作系统实际工程应用的参考。展开更多
文摘This paper analyses the author's escapism In this Composed Upon Westminster Bridge, Sept. 3, 1802 ,and conclusion is reached that the poet wrote this particular poem for his beloved sister. And the sister 's calmness and complacency came to be the best pill to heal the wounds of the poet.
基金National Natural Science Foundation of China(No.71071159)
文摘A comprehensive mission sensitivity analysis index based on Sobol's index called global mission sensitivity( GMS) was proposed in this paper which focused on analyzing the mission sensitivity of components of phased mission systems( PMS). The simulation strategy of GMS based on a Petri net and Monte Carlo method was presented which had broad applicability. Finally,the GMS and Birnbaum's sensitivity of components in a PMS example were compared. The GMS of component is demonstrated to be more adaptable to reflect the component mission sensitivity when the rated reliability parameters of components cannot be obtained, and components have state dependency or the system is subjected to common cause failure.
基金Supported by the Major Program of the National Science Foundation of China(41590851)the Beijing Municipal Science and Technology Commission(Z181100002918003)。
文摘China’s first Mars exploration mission is scheduled to be launched in 2020.It aims not only to conduct global and comprehensive exploration of Mars by use of an orbiter but also to carry out in situ observation of key sites on Mars with a rover.This mission focuses on the following studies:topography,geomorphology,geological structure,soil characteristics,water-ice distribution,material composition,atmosphere and ionosphere,surface climate,environmental characteristics,Mars internal structure,and Martian magnetic field.It is comprised of an orbiter,a lander,and a rover equipped with 13 scientific payloads.This article will give an introduction to the mission including mission plan,scientific objectives,scientific payloads,and its recent development progress.
文摘This article describes practical preparation of marine engineers on the full mission simulator complex of the ship＇s automated electrical power plant. A full mission simulator complex of the ship＇s automated power management system meets International Convention STCW （Standards of Training, Certification and Watchkeeping） 78 （with Manila amendments 2010） requirements in part of adequate reproduction of its operational modes corresponding to the actual configuration and layout of the ship＇s automated power management system with real consumers and typical loads. The simulator is fully consistent with the goals and objectives of the practical training, as well as the goals and objectives of proficiency testing engine department officers on issues of technical maintenance of real ship＇s equipment （high voltage installations included） and means of automation. The simulator＇s complex is designed for training and proficiency testing of cadets and students of maritime educational institutions, as well as training and proficiency testing of marine specialists （mechanics and electricians） by watch-keeping and maintenance of modem integrated automated control systems of ship＇s electric power plant and the individual ship electromechanical systems, including high-voltage systems. A simulator＇s complex provides adequate reproduction of operational situations on technical side of real ship electric and automation equipment provides training on monitoring, control and management diesel-generator sets in hand, semi-automatic and automatic modes of power station, control and management of electromechanical systems, as well as the set of tasks upon parameterization, visualization and etc. Besides number of combinations of monitoring, control and management tasks, the simulator＇s complex provides an opportunity to simulate various practical fault conditions. It allows students to focus on the work of automatic control system in emergency situations and to work out correct actions for a watch-keeper on searching, localizing of faults and troubleshooting of equipment.
文摘Spring is a vibrant and thriving season when everything looks fresh and new.In such a moment full of hope,I would like to give my best wishes to all the readers of International Understanding on behalf of CAFIU."The relationship between two countries relies on the friendly sentiments between their peoples".The friendly relationship between two countries is,in the final analysis,decided by the friendship between the two peoples.
文摘Recently, we interviewed Cewang Jigmei, President of the Tibet Academy of Social Sciences, on the efforts Tibet has made to save King Gesar.QUESTION: The 31st UNESCO Session held in Paris in October 2001 decided unanimously to include activities to celebrate the millennium anniversary of King Gesar in the list of projects undertaken with UNESCO involvement in 2002-2003. Could you please tell me your views on this?ANSWER: This shows the international recognition of, and appreciation for, the
文摘为了适应未来航天任务的发展,构建以服务为导向的、开放的、可重用的航天器任务操作系统,分析了CCSDS(Consultative Committee for Space Data Systems,空间数据系统咨询委员会)中MOIMS(Mission Operations and Information Management System,任务操作及信息管理系统)领域的任务操作服务框架的原理、层次结构及优点,对任务操作相关的通用服务、功能服务、COM(Common Object Model,通用对象模型)及MAL(Message Abstraction Layer,消息抽象层)对服务的抽象化描述方法进行了研究。MAL向任务操作相关的服务提供了通用的服务模型框架,所有服务均可用MAL消息格式进行规范化的描述,在此基础上建立了MAL消息格式与CCSDS空间包的映射关系,从而以CCSDS空间包为信息载体实现了航天器与地面系统间的任务操作通信,可以作为以服务为导向的任务操作系统实际工程应用的参考。
