科学基金作为最重要的科学研究保障性资源,在"双一流"建设中的角色和地位值得关注。文章以"双一流"建设学科中68个自然学科为研究对象,使用Web of Science数据库2012-2016年的521938篇相关研究论文及其引文等数据,...科学基金作为最重要的科学研究保障性资源,在"双一流"建设中的角色和地位值得关注。文章以"双一流"建设学科中68个自然学科为研究对象,使用Web of Science数据库2012-2016年的521938篇相关研究论文及其引文等数据,考察科学基金对我国"双一流"建设学科的前期资助现状、产出情况与影响力。结果显示:在"双一流"建设前期的2012-2016年五年中,科学基金对"双一流"建设学科的资助具有一定的精准性,并在资助率和影响力两个方面有所体现;68个"双一流"建设学科中,科学基金对其中52个学科的资助率高于我国基金资助率平均水平,对58个学科的论文影响力有提升作用。展开更多
"双一流"建设不仅是国家高等教育战略,也应带动区域科技创新与发展。文章从"双一流"建设学科与区域产业发展互动的角度,以上海市为例,将上海市"全球科创中心"建设中的信息技术、生物医药、装备制造三大..."双一流"建设不仅是国家高等教育战略,也应带动区域科技创新与发展。文章从"双一流"建设学科与区域产业发展互动的角度,以上海市为例,将上海市"全球科创中心"建设中的信息技术、生物医药、装备制造三大重点领域与该市在国家"双一流"建设中的相关学科进行关联分析。基于Web of Science数据库2012-2016年上海"双一流"建设学科在三大领域的基础研究论文数据,从产出支撑水平、学科特色优势、企业协作倾向三个方面进行分析。研究发现:上海市"双一流"建设学科发展速度低于该学科整体,其高校与企业合作比重也存在提升空间;上海市生物医药与装备制造领域的"双一流"建设学科对区域企业创新均具有一定引领作用,但信息技术领域"双一流"学科科研支撑需进一步提升与加强。展开更多
To find out the influence of technological parameters on optical performance of fused optical fiber device, the fiber coupler was served as subject investigated by using the fused biconical taper machining as experime...To find out the influence of technological parameters on optical performance of fused optical fiber device, the fiber coupler was served as subject investigated by using the fused biconical taper machining as experimental setup. Fused fiber coupler's optical performances such as insertion loss, excess loss, directivity and uniformity were tested with the optical test system that was constituted of tunable laser and optical spectrum analyzer. Especially the relationship between optical performance and drawing speed was investigated. The experimental results show that the optical performance is closely related to process conditions. At fused temperature of 1 200 ℃, there exists a drawing speed of 150 μms, which makes the device's performance optimum. Out of this speed region, the optical performance drops quickly. At drawing speed of 200 μms, the excess loss is relatively small when the fused temperature is above 1 200 ℃. So the technological parameters have close relationship with optical performance of the coupler, and the good performance coupler can't get until the drawing speed and fused temperature match accurately.展开更多
文摘科学基金作为最重要的科学研究保障性资源,在"双一流"建设中的角色和地位值得关注。文章以"双一流"建设学科中68个自然学科为研究对象,使用Web of Science数据库2012-2016年的521938篇相关研究论文及其引文等数据,考察科学基金对我国"双一流"建设学科的前期资助现状、产出情况与影响力。结果显示:在"双一流"建设前期的2012-2016年五年中,科学基金对"双一流"建设学科的资助具有一定的精准性,并在资助率和影响力两个方面有所体现;68个"双一流"建设学科中,科学基金对其中52个学科的资助率高于我国基金资助率平均水平,对58个学科的论文影响力有提升作用。
文摘"双一流"建设不仅是国家高等教育战略,也应带动区域科技创新与发展。文章从"双一流"建设学科与区域产业发展互动的角度,以上海市为例,将上海市"全球科创中心"建设中的信息技术、生物医药、装备制造三大重点领域与该市在国家"双一流"建设中的相关学科进行关联分析。基于Web of Science数据库2012-2016年上海"双一流"建设学科在三大领域的基础研究论文数据,从产出支撑水平、学科特色优势、企业协作倾向三个方面进行分析。研究发现:上海市"双一流"建设学科发展速度低于该学科整体,其高校与企业合作比重也存在提升空间;上海市生物医药与装备制造领域的"双一流"建设学科对区域企业创新均具有一定引领作用,但信息技术领域"双一流"学科科研支撑需进一步提升与加强。
基金Project (50605063) supported by the National Natural Science Foundation of ChinaProject(NCET-040753) supported by New Century Excellent Talents in University of ChinaProject (20050533037) supported by the Doctoral Program of Higher Education of China
文摘To find out the influence of technological parameters on optical performance of fused optical fiber device, the fiber coupler was served as subject investigated by using the fused biconical taper machining as experimental setup. Fused fiber coupler's optical performances such as insertion loss, excess loss, directivity and uniformity were tested with the optical test system that was constituted of tunable laser and optical spectrum analyzer. Especially the relationship between optical performance and drawing speed was investigated. The experimental results show that the optical performance is closely related to process conditions. At fused temperature of 1 200 ℃, there exists a drawing speed of 150 μms, which makes the device's performance optimum. Out of this speed region, the optical performance drops quickly. At drawing speed of 200 μms, the excess loss is relatively small when the fused temperature is above 1 200 ℃. So the technological parameters have close relationship with optical performance of the coupler, and the good performance coupler can't get until the drawing speed and fused temperature match accurately.
