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
The SJ-5 (Shijian-5) spacecraft is the first China-made satellite for scientific research with theCAS as the user. Blasting off from the TaiyuanSatellite Launch Center on May 10, l999, the SJ-5completed its main exper...The SJ-5 (Shijian-5) spacecraft is the first China-made satellite for scientific research with theCAS as the user. Blasting off from the TaiyuanSatellite Launch Center on May 10, l999, the SJ-5completed its main experimental tasks on scheduleafter a 90-day-long earth-orbit flight. The normaloperation of the satellite’s platform provided aguarantee for the smooth fulfillment of its mission.All payloads aboard the satellite were independent-展开更多
Organizations, no matter their kinds, are established to serve specific societal needs. The success of an organization depends on its ability to direct the energies of its members in effectively serving these needs. T...Organizations, no matter their kinds, are established to serve specific societal needs. The success of an organization depends on its ability to direct the energies of its members in effectively serving these needs. The primary motive for the existence of any organization is often expressed in its mission. It is heartwarming that most Nigerian organizations （profit and non-profit alike） have mission statements conspicuously displayed in their front offices However, the efficacies of these mission statements in securing the needed employees support and commitment have not being fully investigated within the Nigerian context. The authors used structured questionnaires to elicit required responses from respondents＇ employees of various Nigerian organizations. It was affirmed that the statements of properly formulated and communicated missions are potent tools in the hands of management in unleashing employees＇ commitment and improving organizational performance. It was recommended that Nigeria organizations should move beyond the use of mission statements as mere ＂slogans＂ and open up employees＇ ＂eyes to see how their daily tasks and roles as enshrined in the vision and mission can move the organization towards the attainment of its objectives展开更多
The higher education reform course with the change of time is closely linked.Recalling the road of sixty years development of higher education,higher Jiaoyugaige must clarify the relationship between the development a...The higher education reform course with the change of time is closely linked.Recalling the road of sixty years development of higher education,higher Jiaoyugaige must clarify the relationship between the development and changes of the era,explore the effect of the development cycle of change,and change their understanding in the mission of times to the development of a reserve force in the transformation steadily forward.展开更多
The code of ethics and standards of professional conduct are important and necessary,for it provides standards for professional's daily dealing.It forbids conflicts of interest minimizing problems;it enhances publ...The code of ethics and standards of professional conduct are important and necessary,for it provides standards for professional's daily dealing.It forbids conflicts of interest minimizing problems;it enhances public trust;and it lifts up high moral and ethical standards.Maintaining independence and objectivity in daily activities and following the code provide a fine basis of ethi caljudgments.展开更多
The definition, goal and impacts of deep space exploration are summarized. After a retrospect to past deep exploration activities of human being to date, both recent deep space missions and future missions in 5 years ...The definition, goal and impacts of deep space exploration are summarized. After a retrospect to past deep exploration activities of human being to date, both recent deep space missions and future missions in 5 years are also listed. There are also brief introductions about the future strategic plans of NASA, ESA, RAKA, JAXA and ISRO. Then authors analyze some important features of global deep space exploration scheme. Key technologies of deep space exploration are also determined. The status of China deep exploration plan is introduced including CE-1 lunar orbiter, the subsequent China Lunar Exploration Program, especially proposal for the second stage of China Lunar Exploration Program, Mars exploration program of China with Russia Kuafu mission, Hard X-Ray Modulated Telescope, Space Solar Telescope. At the end, some suggestions for China future deep space exploration are made.展开更多
低轨遥感星座任务规划是一个复杂的多目标优化问题,目前基于深度强化学习的卫星任务规划研究存在试验数据星座规模小、优化目标单一、任务重复安排或模型适应性差等问题.针对上述问题,提出CON_DQN(Contract network and Deep Q Network...低轨遥感星座任务规划是一个复杂的多目标优化问题,目前基于深度强化学习的卫星任务规划研究存在试验数据星座规模小、优化目标单一、任务重复安排或模型适应性差等问题.针对上述问题,提出CON_DQN(Contract network and Deep Q Network)算法,采用主从星在轨分布式协商机制,从星基于规划决策,主星基于深度强化学习算法决策,从任务优先级、资源代价和负载均衡等方面进行多目标优化,实现面向即时响应的卫星在轨分布式协商智能任务规划.针对用户需求高频动态到达重点观测区域的场景,进行百星级星座不同规模任务集的仿真实验,结果表明本文所提算法的响应速度较快且能达到较高的任务收益.展开更多
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The SJ-5 (Shijian-5) spacecraft is the first China-made satellite for scientific research with theCAS as the user. Blasting off from the TaiyuanSatellite Launch Center on May 10, l999, the SJ-5completed its main experimental tasks on scheduleafter a 90-day-long earth-orbit flight. The normaloperation of the satellite’s platform provided aguarantee for the smooth fulfillment of its mission.All payloads aboard the satellite were independent-
文摘Organizations, no matter their kinds, are established to serve specific societal needs. The success of an organization depends on its ability to direct the energies of its members in effectively serving these needs. The primary motive for the existence of any organization is often expressed in its mission. It is heartwarming that most Nigerian organizations （profit and non-profit alike） have mission statements conspicuously displayed in their front offices However, the efficacies of these mission statements in securing the needed employees support and commitment have not being fully investigated within the Nigerian context. The authors used structured questionnaires to elicit required responses from respondents＇ employees of various Nigerian organizations. It was affirmed that the statements of properly formulated and communicated missions are potent tools in the hands of management in unleashing employees＇ commitment and improving organizational performance. It was recommended that Nigeria organizations should move beyond the use of mission statements as mere ＂slogans＂ and open up employees＇ ＂eyes to see how their daily tasks and roles as enshrined in the vision and mission can move the organization towards the attainment of its objectives
文摘The higher education reform course with the change of time is closely linked.Recalling the road of sixty years development of higher education,higher Jiaoyugaige must clarify the relationship between the development and changes of the era,explore the effect of the development cycle of change,and change their understanding in the mission of times to the development of a reserve force in the transformation steadily forward.
文摘The code of ethics and standards of professional conduct are important and necessary,for it provides standards for professional's daily dealing.It forbids conflicts of interest minimizing problems;it enhances public trust;and it lifts up high moral and ethical standards.Maintaining independence and objectivity in daily activities and following the code provide a fine basis of ethi caljudgments.
文摘The definition, goal and impacts of deep space exploration are summarized. After a retrospect to past deep exploration activities of human being to date, both recent deep space missions and future missions in 5 years are also listed. There are also brief introductions about the future strategic plans of NASA, ESA, RAKA, JAXA and ISRO. Then authors analyze some important features of global deep space exploration scheme. Key technologies of deep space exploration are also determined. The status of China deep exploration plan is introduced including CE-1 lunar orbiter, the subsequent China Lunar Exploration Program, especially proposal for the second stage of China Lunar Exploration Program, Mars exploration program of China with Russia Kuafu mission, Hard X-Ray Modulated Telescope, Space Solar Telescope. At the end, some suggestions for China future deep space exploration are made.
文摘低轨遥感星座任务规划是一个复杂的多目标优化问题,目前基于深度强化学习的卫星任务规划研究存在试验数据星座规模小、优化目标单一、任务重复安排或模型适应性差等问题.针对上述问题,提出CON_DQN(Contract network and Deep Q Network)算法,采用主从星在轨分布式协商机制,从星基于规划决策,主星基于深度强化学习算法决策,从任务优先级、资源代价和负载均衡等方面进行多目标优化,实现面向即时响应的卫星在轨分布式协商智能任务规划.针对用户需求高频动态到达重点观测区域的场景,进行百星级星座不同规模任务集的仿真实验,结果表明本文所提算法的响应速度较快且能达到较高的任务收益.
