基于SCI论文的机构研究发展态势与竞争力研究是分析我国某一学科领域发展现状和竞争力的重要分析点。从论文产出、国际合作与论文发展竞争等方面设计相关指标,从不同侧面构建基于SCI论文的领域研究发展态势与国际地位的分析方法,并以我...基于SCI论文的机构研究发展态势与竞争力研究是分析我国某一学科领域发展现状和竞争力的重要分析点。从论文产出、国际合作与论文发展竞争等方面设计相关指标,从不同侧面构建基于SCI论文的领域研究发展态势与国际地位的分析方法,并以我国天文学为例进行阐释,为相关科技决策部门提供政策制定、资金支持等方面的决策依据。利用Web of Science数据库、ESI数据库开展文献计量分析,获得我国天文台SCI论文产出(1990-2014)、王冠指数、f指数等指标,并与世界其他不同层次的机构进行对比,分析我国天文台SCI论文产出发展态势和国际竞争力,寻找与国外类似研究机构相比的优势与差距。展开更多
A model for binary evolution is introduced which can determine whether the rotation of components is synchronized with the orbital motion, and can calculate the evolution of both the synchronized and non-synchronized ...A model for binary evolution is introduced which can determine whether the rotation of components is synchronized with the orbital motion, and can calculate the evolution of both the synchronized and non-synchronized binary systems. With this model, the evolution of a binary system consisting of a 9 M star and a 6 M star is studied with mass transfer Case B. The result shows that the synchronization of the rotational and orbital periods can be reached when the binary system is a detached system and before the occurrence of the first mass transfer. After the onset of the first mass transfer, the binary system becomes non-synchronized. The mass accepted component (the secondary) rotates faster with a period much smaller than that of the orbital motion.展开更多
文摘基于SCI论文的机构研究发展态势与竞争力研究是分析我国某一学科领域发展现状和竞争力的重要分析点。从论文产出、国际合作与论文发展竞争等方面设计相关指标,从不同侧面构建基于SCI论文的领域研究发展态势与国际地位的分析方法,并以我国天文学为例进行阐释,为相关科技决策部门提供政策制定、资金支持等方面的决策依据。利用Web of Science数据库、ESI数据库开展文献计量分析,获得我国天文台SCI论文产出(1990-2014)、王冠指数、f指数等指标,并与世界其他不同层次的机构进行对比,分析我国天文台SCI论文产出发展态势和国际竞争力,寻找与国外类似研究机构相比的优势与差距。
文摘A model for binary evolution is introduced which can determine whether the rotation of components is synchronized with the orbital motion, and can calculate the evolution of both the synchronized and non-synchronized binary systems. With this model, the evolution of a binary system consisting of a 9 M star and a 6 M star is studied with mass transfer Case B. The result shows that the synchronization of the rotational and orbital periods can be reached when the binary system is a detached system and before the occurrence of the first mass transfer. After the onset of the first mass transfer, the binary system becomes non-synchronized. The mass accepted component (the secondary) rotates faster with a period much smaller than that of the orbital motion.
