Through the centurial research upon the thoughts of Marx,there is a turning from historical restoration to fusion of horizons,which is closely related to the research methodology of the thoughts of Marx as well as the...Through the centurial research upon the thoughts of Marx,there is a turning from historical restoration to fusion of horizons,which is closely related to the research methodology of the thoughts of Marx as well as the big change of the academic study,economy and society.To have a better understanding of Marxism,communication between readers and authors,integration of the theory and practice are necessary.Besides,we should distinguish academic study from politics,definition from significance,and genuine knowledge from misunderstanding.Different researchers study Marxism from different aspects and in different historical contexts,thus forming different images of Marx and different understandings of Marxism.Therefore,research upon the thoughts of Marx and Marxism cannot be completed once and for all.展开更多
The earth observation satellites(EOSs)scheduling problem for emergency tasks often presents many challenges.For example,the scheduling calculation should be completed in seconds,the scheduled task rate is supposed to ...The earth observation satellites(EOSs)scheduling problem for emergency tasks often presents many challenges.For example,the scheduling calculation should be completed in seconds,the scheduled task rate is supposed to be as high as possible,the disturbance measure of the scheme should be as low as possible,which may lead to the loss of important observation opportunities and data transmission delays.Existing scheduling algorithms are not designed for these requirements.Consequently,we propose a rolling horizon strategy(RHS)based on event triggering as well as a heuristic algorithm based on direct insertion,shifting,backtracking,deletion,and reinsertion(ISBDR).In the RHS,the driven scheduling mode based on the emergency task arrival and control station time window events are designed to transform the long-term,large-scale problem into a short-term,small-scale problem,which can improve the schedulability of the original scheduling scheme and emergency response sensitivity.In the ISBDR algorithm,the shifting rule with breadth search capability and backtracking rule with depth search capability are established to realize the rapid adjustment of the original plan and improve the overall benefit of the plan and early completion of emergency tasks.Simultaneously,two heuristic factors,namely the emergency task urgency degree and task conflict degree,are constructed to improve the emergency task scheduling guidance and algorithm efficiency.Finally,we conduct extensive experiments by means of simulations to compare the algorithms based on ISBDR and direct insertion,shifting,deletion,and reinsertion(ISDR).The results demonstrate that the proposed algorithm can improve the timeliness of emergency tasks and scheduling performance,and decrease the disturbance measure of the scheme,therefore,it is more suitable for emergency task scheduling.展开更多
The deepwater horizon blowout led to the release of 4.9 million barrels of crude oil into the Gulf of Mexico （GOM）. Here the paper analyzes available sediment datasets to determine whether changes in petrogenic cont...The deepwater horizon blowout led to the release of 4.9 million barrels of crude oil into the Gulf of Mexico （GOM）. Here the paper analyzes available sediment datasets to determine whether changes in petrogenic contaminants are evident in GOM sediment following the blowout. Locations sampled by EPA （Environmental Protection Agency）, British Petroleum （BP） and NOAA （National Oceanic and Atmospheric Administration） were reduced and grouped into 46 similar locations and analyzed. Eleven groups suggested an increase in PAIl （polycyclic aromatic hydrocarbon） and nickel, one group showed a statistically significant increase in Phenanthrene. Four locations were analyzed for time trends and differences between initial and peak concentrations of oil range organics （ORO）, diesel range organics （DRO）, vanadium and nickel. One location had significant increases in ORO, DRO and vanadium and a suggestive increase in nickel. Correlations between ORO/DRO, ORO/V, ORO/Ni, V/Ni were computed （RE= 0.85, 0.67, 0.64, 0.92, respectively）. Overall, the analyses suggest that future monitoring should employ a sampling strategy that coordinates response sampling to previously sampled locations, such that baseline datasets can be used in detection of event associated contamination.展开更多
拉里·约翰逊(Larry Johnson)博士是美国新媒体联盟(New Media Consortium,NMC)的首席执行官,是国际知名的教育信息化专家,一直致力于为学习、研究和创新来探索和开发新技术。他曾担任过高等教育领域的多个研究机构的主席或高级管...拉里·约翰逊(Larry Johnson)博士是美国新媒体联盟(New Media Consortium,NMC)的首席执行官,是国际知名的教育信息化专家,一直致力于为学习、研究和创新来探索和开发新技术。他曾担任过高等教育领域的多个研究机构的主席或高级管理人员,拥有将近30年的全球教育领域的经验。从教授到院长,教务处长到校长,从首席技术官(CIO)到首席执行官(CEO),拉里·约翰逊博士具有丰富的跨领域工作的经历。到目前为止,他已出版了5本专著,参与7本著作的撰写,发表50多篇研究论文和研究报告,被世界各国的权威组织、科研机构和政府部门邀请作了125场主题报告。近20年来,新媒体联盟持续关注国际教育信息化的发展趋势,其成员来自于全球数百个知名大学、博物馆和顶尖企业。作为美国新媒体联盟地平线项目(Horizon Project)的创始人,拉里·约翰逊博士与来自世界各地的未来学家和思想领袖就新技术应用开展对话和合作,并探讨新出现的趋势和问题。该项目已发布了一系列《地平线报告》(Horizon Reports),覆盖视觉素养,学习对象,教育游戏,沉浸学习和社交网络等议题。目前,地平线报告已通过六种语言发布,为全球100多个国家的教育机构提供信息化发展战略咨询,在全球150多个国家拥有超过125万读者,已成为高等教育学校和博物馆高级管理人员的重要参考资料。在访谈中,拉里·约翰逊博士与我们一起分享了《地平线报告》的发展历程,并对全球教育信息化的发展现状和未来趋势进行了介绍和评价。展开更多
国际新媒体联盟(New Media Consortium,简称NMC)发布的《地平线报告(高等教育版)》已成为高等教育未来发展与革新的指南,影响着新兴技术在高等教育中的应用与发展。《2017地平线报告(高等教育版)》的发布,再一次吸引了国内外学者的眼球...国际新媒体联盟(New Media Consortium,简称NMC)发布的《地平线报告(高等教育版)》已成为高等教育未来发展与革新的指南,影响着新兴技术在高等教育中的应用与发展。《2017地平线报告(高等教育版)》的发布,再一次吸引了国内外学者的眼球。该地平线报告采用德尔菲法,预测高等教育未来5年所采用的六项关键技术、六个发展趋势、六项挑战。六项关键技术:自适应学习技术、移动学习、物联网、下一代学习管理系统、人工智能、自然用户界面。六个发展趋势:混合学习设计、协作学习方法、日益注重学习测量、重新设计学习空间、推动创新文化、深度学习方法。六项挑战:提升数字素养、整合正式学习与非正式学习、成就差异、数字公平、管理知识老化、重塑教育者角色。通过解读报告,分析了新兴技术影响高等教育的教学、学习和创新等问题,并对未来高等教育的发展做深入的讨论。展开更多
美国新媒体联盟(New Media Consortium,NMC)发布的《地平线报告》采用德尔菲法,着重探讨影响未来5年高等教育变革的六项新兴技术,并从政策、领导力和实践三个方面讨论影响高等教育技术应用的趋势和挑战。文章通过对《2016地平线报告(高...美国新媒体联盟(New Media Consortium,NMC)发布的《地平线报告》采用德尔菲法,着重探讨影响未来5年高等教育变革的六项新兴技术,并从政策、领导力和实践三个方面讨论影响高等教育技术应用的趋势和挑战。文章通过对《2016地平线报告(高等教育版)》进行深度解读,分析了高等教育未来的机遇与挑战,以期为高等教育变革提供可行性的建议,进一步推进教育信息化的发展。展开更多
基金the staged achievement of the national fund program of social sciences for the western regions-The Historical Evolution and Contemporary Development of the Research Methodology of the Formation History of the Marxist Philosophy in China(12XZX003)
文摘Through the centurial research upon the thoughts of Marx,there is a turning from historical restoration to fusion of horizons,which is closely related to the research methodology of the thoughts of Marx as well as the big change of the academic study,economy and society.To have a better understanding of Marxism,communication between readers and authors,integration of the theory and practice are necessary.Besides,we should distinguish academic study from politics,definition from significance,and genuine knowledge from misunderstanding.Different researchers study Marxism from different aspects and in different historical contexts,thus forming different images of Marx and different understandings of Marxism.Therefore,research upon the thoughts of Marx and Marxism cannot be completed once and for all.
基金supported by the National Natural Science Foundation of China(71671059)
文摘The earth observation satellites(EOSs)scheduling problem for emergency tasks often presents many challenges.For example,the scheduling calculation should be completed in seconds,the scheduled task rate is supposed to be as high as possible,the disturbance measure of the scheme should be as low as possible,which may lead to the loss of important observation opportunities and data transmission delays.Existing scheduling algorithms are not designed for these requirements.Consequently,we propose a rolling horizon strategy(RHS)based on event triggering as well as a heuristic algorithm based on direct insertion,shifting,backtracking,deletion,and reinsertion(ISBDR).In the RHS,the driven scheduling mode based on the emergency task arrival and control station time window events are designed to transform the long-term,large-scale problem into a short-term,small-scale problem,which can improve the schedulability of the original scheduling scheme and emergency response sensitivity.In the ISBDR algorithm,the shifting rule with breadth search capability and backtracking rule with depth search capability are established to realize the rapid adjustment of the original plan and improve the overall benefit of the plan and early completion of emergency tasks.Simultaneously,two heuristic factors,namely the emergency task urgency degree and task conflict degree,are constructed to improve the emergency task scheduling guidance and algorithm efficiency.Finally,we conduct extensive experiments by means of simulations to compare the algorithms based on ISBDR and direct insertion,shifting,deletion,and reinsertion(ISDR).The results demonstrate that the proposed algorithm can improve the timeliness of emergency tasks and scheduling performance,and decrease the disturbance measure of the scheme,therefore,it is more suitable for emergency task scheduling.
文摘The deepwater horizon blowout led to the release of 4.9 million barrels of crude oil into the Gulf of Mexico （GOM）. Here the paper analyzes available sediment datasets to determine whether changes in petrogenic contaminants are evident in GOM sediment following the blowout. Locations sampled by EPA （Environmental Protection Agency）, British Petroleum （BP） and NOAA （National Oceanic and Atmospheric Administration） were reduced and grouped into 46 similar locations and analyzed. Eleven groups suggested an increase in PAIl （polycyclic aromatic hydrocarbon） and nickel, one group showed a statistically significant increase in Phenanthrene. Four locations were analyzed for time trends and differences between initial and peak concentrations of oil range organics （ORO）, diesel range organics （DRO）, vanadium and nickel. One location had significant increases in ORO, DRO and vanadium and a suggestive increase in nickel. Correlations between ORO/DRO, ORO/V, ORO/Ni, V/Ni were computed （RE= 0.85, 0.67, 0.64, 0.92, respectively）. Overall, the analyses suggest that future monitoring should employ a sampling strategy that coordinates response sampling to previously sampled locations, such that baseline datasets can be used in detection of event associated contamination.
文摘国际新媒体联盟(New Media Consortium,简称NMC)发布的《地平线报告(高等教育版)》已成为高等教育未来发展与革新的指南,影响着新兴技术在高等教育中的应用与发展。《2017地平线报告(高等教育版)》的发布,再一次吸引了国内外学者的眼球。该地平线报告采用德尔菲法,预测高等教育未来5年所采用的六项关键技术、六个发展趋势、六项挑战。六项关键技术:自适应学习技术、移动学习、物联网、下一代学习管理系统、人工智能、自然用户界面。六个发展趋势:混合学习设计、协作学习方法、日益注重学习测量、重新设计学习空间、推动创新文化、深度学习方法。六项挑战:提升数字素养、整合正式学习与非正式学习、成就差异、数字公平、管理知识老化、重塑教育者角色。通过解读报告,分析了新兴技术影响高等教育的教学、学习和创新等问题,并对未来高等教育的发展做深入的讨论。
文摘美国新媒体联盟(New Media Consortium,NMC)发布的《地平线报告》采用德尔菲法,着重探讨影响未来5年高等教育变革的六项新兴技术,并从政策、领导力和实践三个方面讨论影响高等教育技术应用的趋势和挑战。文章通过对《2016地平线报告(高等教育版)》进行深度解读,分析了高等教育未来的机遇与挑战,以期为高等教育变革提供可行性的建议,进一步推进教育信息化的发展。
