During the afternoon of April 27,2017,a symposium attended by the editorial department of the journal Contemporary Social Sciences and the deans of the colleges of foreign languages of universities in Sichuan was held...During the afternoon of April 27,2017,a symposium attended by the editorial department of the journal Contemporary Social Sciences and the deans of the colleges of foreign languages of universities in Sichuan was held at the Sichuan Academy of Social Sciences(SASS).The theme of the symposium was,'Giving play to the advantages of foreign language schools,integrating resources and展开更多
Introduction On November 1 and 2,2024,53 deans,associate deans,and other educational leaders from 40 institutions across 29 countries gathered in Shanghai for the sixth annual Global Education Deans Forum(GEDF).The GE...Introduction On November 1 and 2,2024,53 deans,associate deans,and other educational leaders from 40 institutions across 29 countries gathered in Shanghai for the sixth annual Global Education Deans Forum(GEDF).The GEDF was established to afford educational deans at research universities from around the world the opportunity to identify and discuss shared problems and challenges and to forge collaborative partnerships.GEDF co-founding Deans Zhenguo Yuan and Rick Ginsberg seeded the conversations for the coming day and a half in their opening remarks.展开更多
Artificial intelligence(AI)is upending industries and,in many cases,supplanting traditional computer science techniques.This transition from an emerging technology to an established one is putting new burdens on unive...Artificial intelligence(AI)is upending industries and,in many cases,supplanting traditional computer science techniques.This transition from an emerging technology to an established one is putting new burdens on universities to adapt.The Fifth Global Forum on Development of Computer Science convened at Tsinghua University in the spring of this year to discuss these changes under the theme of“Development of Computer Science in the AI Era”with the aim of reaching a consensus regarding these challenges.Six heads of computer science departments shared keynotes exploring issues such as how to adapt academic and research programs to align with the advancement of AI,how to align educational programs to provide necessary AI skills,how to raise awareness around AI ethics,and how to evaluate researcher productivity.Throughout these discussions,various approaches emerged,including structurally distinguishing AI initiatives from core programs to support more targeted programs,introducing new programs that expand access to AI education,and using AI tools to support personalized education.展开更多
The flow characteristics of shell-side fluid in the tube-and-shell heat exchangers with trisection helical baffles with 35° inclined angles are numerically analyzed. The secondary flow distribution of the fluid i...The flow characteristics of shell-side fluid in the tube-and-shell heat exchangers with trisection helical baffles with 35° inclined angles are numerically analyzed. The secondary flow distribution of the fluid in the shell-side channel is focused on. The results on meridian planes indicate that in the shell-side channel, the center part of fluid has an outward tendency because of the centrifugal force, and the peripheral region fluid has an inward tendency under the centripetal force. So in a spiral cycle, the fluid is divided into the upper and lower beams of streamlines, at the same time the Dean vortices are formed near the left baffle, and then the fluid turns to centripetal flow near the right baffle. Finally the two beams of streamlines merge in the main flow. The results of a number of parallel slices between two parallel baffles with the same sector in a swirl cycle also show the existence of the secondary flow and some backward flows at the V-gaps of the adjacent baffles. The secondary flows have a positive effect on mixing fluid by promoting the momentum and mass exchange between fluid particles near the tube wall and in the main stream, and thus they will enhance the heat transfer of the helix heat exchanger.展开更多
将弯道层流流动形成的Dean涡产生的微粒分离原理运用于污水的2级处理,通过研发水动力分离处理装置,采用投加适量絮凝剂后的某河水进行实验,研究在流道中不同体积流量和絮凝剂含量下装置的分离效果。结果表明：当进水粒径在94.55~161.4μ...将弯道层流流动形成的Dean涡产生的微粒分离原理运用于污水的2级处理,通过研发水动力分离处理装置,采用投加适量絮凝剂后的某河水进行实验,研究在流道中不同体积流量和絮凝剂含量下装置的分离效果。结果表明：当进水粒径在94.55~161.4μm时,分离效果最好;当体积流量小于600 m L/min时,体积流量越大则分离效果越高,而体积流量大于600 m L/min后,分离效果基本不变;在体积流量为600 m L/min时对浊度的去除率在90%以上,对TP和SS去除率分别在85%和50%以上,经装置分离后的清水的浊度大致为1 NTU;在体积流量为600 m L/min时,絮凝剂Fe Cl3的适宜投加质量浓度为21 mg/L。展开更多
文摘During the afternoon of April 27,2017,a symposium attended by the editorial department of the journal Contemporary Social Sciences and the deans of the colleges of foreign languages of universities in Sichuan was held at the Sichuan Academy of Social Sciences(SASS).The theme of the symposium was,'Giving play to the advantages of foreign language schools,integrating resources and
文摘Introduction On November 1 and 2,2024,53 deans,associate deans,and other educational leaders from 40 institutions across 29 countries gathered in Shanghai for the sixth annual Global Education Deans Forum(GEDF).The GEDF was established to afford educational deans at research universities from around the world the opportunity to identify and discuss shared problems and challenges and to forge collaborative partnerships.GEDF co-founding Deans Zhenguo Yuan and Rick Ginsberg seeded the conversations for the coming day and a half in their opening remarks.
文摘Artificial intelligence(AI)is upending industries and,in many cases,supplanting traditional computer science techniques.This transition from an emerging technology to an established one is putting new burdens on universities to adapt.The Fifth Global Forum on Development of Computer Science convened at Tsinghua University in the spring of this year to discuss these changes under the theme of“Development of Computer Science in the AI Era”with the aim of reaching a consensus regarding these challenges.Six heads of computer science departments shared keynotes exploring issues such as how to adapt academic and research programs to align with the advancement of AI,how to align educational programs to provide necessary AI skills,how to raise awareness around AI ethics,and how to evaluate researcher productivity.Throughout these discussions,various approaches emerged,including structurally distinguishing AI initiatives from core programs to support more targeted programs,introducing new programs that expand access to AI education,and using AI tools to support personalized education.
基金The National Natural Science Foundation of China (No.50976022)the National Key Technology R&D Program of China during the 11th Five-Year Plan Period (No.2008BAJ12B02)
文摘The flow characteristics of shell-side fluid in the tube-and-shell heat exchangers with trisection helical baffles with 35° inclined angles are numerically analyzed. The secondary flow distribution of the fluid in the shell-side channel is focused on. The results on meridian planes indicate that in the shell-side channel, the center part of fluid has an outward tendency because of the centrifugal force, and the peripheral region fluid has an inward tendency under the centripetal force. So in a spiral cycle, the fluid is divided into the upper and lower beams of streamlines, at the same time the Dean vortices are formed near the left baffle, and then the fluid turns to centripetal flow near the right baffle. Finally the two beams of streamlines merge in the main flow. The results of a number of parallel slices between two parallel baffles with the same sector in a swirl cycle also show the existence of the secondary flow and some backward flows at the V-gaps of the adjacent baffles. The secondary flows have a positive effect on mixing fluid by promoting the momentum and mass exchange between fluid particles near the tube wall and in the main stream, and thus they will enhance the heat transfer of the helix heat exchanger.
文摘将弯道层流流动形成的Dean涡产生的微粒分离原理运用于污水的2级处理,通过研发水动力分离处理装置,采用投加适量絮凝剂后的某河水进行实验,研究在流道中不同体积流量和絮凝剂含量下装置的分离效果。结果表明：当进水粒径在94.55~161.4μm时,分离效果最好;当体积流量小于600 m L/min时,体积流量越大则分离效果越高,而体积流量大于600 m L/min后,分离效果基本不变;在体积流量为600 m L/min时对浊度的去除率在90%以上,对TP和SS去除率分别在85%和50%以上,经装置分离后的清水的浊度大致为1 NTU;在体积流量为600 m L/min时,絮凝剂Fe Cl3的适宜投加质量浓度为21 mg/L。
