Tsinghua University Tsinghua-TOYO Research and Development Center of Magnesium and Aluminum Alloys Processing Technology

Tsinghua-TOYO Research and Development Center of Magnesium and Aluminum Alloys Processing Technology was officially established between Tsinghua University and TOYO Machinery & Metal Co. on Feb. 26, 2002, which is a non-independent legal research organization located in Department of Mechanical Engineering of Tsinghua University. The center was equipped with one set of 650t automatic magnesium and aluminum alloys diecasting machine and necessary accessories including the melting furnaces for magnesium alloys and aluminum alloys, an accurate magnesium pump to transfer the magnesium alloys to the shot sleeve of the die casting machine, a die temperature controller, and data logging systems for cavity pressure and die temperature distributions, etc. The center is aimed to the research and development of magnesium and aluminum die casting process and their related technologies, and the main research contents include:

Development and Application of Universal Formability Technology

Using mathematical plasticity theories, universal formability (UF) technology has been developed and applied in the automotive stamping engineering and production. As a formability analysis tool, this technology is the major methodology for the development of stamping expert system (solution provider) for (a) product design and feasibility analysis, (b) material automatic selection using nomograms, (c) draw die design using pre-models, and (d) UF and robustness analysis of die performance in finite element analysis (FEA) environment.

Developing Universities into Learning Organizations

A number of companies and organizations consider that it is necessary todevelop into learning organizations in order to meet the challenges of rapidly changing world. Aftera review on the literature on the learning organization, there is no question that the concept isboth attractive and complex. There appears to be more consensus about that becoming a learningorganization is more of a journey than a destination. Senge identifies five key disciplines thatKelp organization to become a learning organization, and the disciplines mean commitment, focus,and practice. In recent years the concept of the learning organization is translated into theeducation sector. Today, more than ever, more and more people see education as the highest form ofleverage to improve society. As the highest form of the education sector, universities must try todevelop into learning organizations. But the process will be neither easy nor swift, and we shouldview the process not as a task to be completed, but as the ongoing work. Effective change andimprovement can only happen by conducting long-term practice involving teachers, administrators,parents, and students who have a common vision and work and live with a learning culture.

Research on the Transformation and Development of Universities under the Combination of Science and Education and the Combination of Production and Education

The research on the transformation and development of colleges and universities in China involves the connotation,causes,target orientation,content and conditions,problems encountered in the transformation and development.Therefore,the author studies the transformation and development of Universities under the integration of education,industry and education.The research shows that the development of integration of general vocational education is the basic feature of Applied Undergraduate education,the development of integration of industry and education is the basic way of Applied Undergraduate education,and the development of integration of science and education is the basic law of Applied Undergraduate education.Colleges and universities must grasp the transformational development path of integration of science and education,integration of production and education,and clarify the orientation of running schools for the local economic development and the development of disciplines to connect regional industries.

Study on the Rights to Subsistence and Development with Reference to the Origin of the Universal Declaration of Human Rights

I.The History of the Drafting of the Universal Declaration of Human Rights:the Position and Role of the UN Economic and Social Council and the General Assembly of the United Nations should not be Ignored The reason for me to use the term "source"in the discussion on the right to subsistence

职业化专业化背景下高校辅导员工作“1+X”模式的设计

目前,高校辅导员工作存在着思想政治教育主功能弱化、专业化动力不足、职业化瓶颈明显等普遍性、深层次的问题。辅导员工作"1+X"模式对现有辅导员工作体系进行优化设计,进一步明确辅导员在高校人才培养体系中的主体地位,畅通和拓宽辅导员职称、职务发展通道,充分发挥高校育人工作主体协同育人的作用,以期"解放辅导员",从而加快推进辅导员职业化、专业化建设,实现辅导员"横向"和"纵向"的职业动态化发展,提高辅导员工作科学化水平。

围绕重点学科建设的高校图书馆信息服务

分三方面阐述如何深化图书馆信息服务 ,以促进重点学科建设 :1 建立全面系统的文献信息保障 ;2 主动开展深层次的情报信息服务 ;3 营造良好的服务条件。

Symposium on Cell Signaling in Cancer, Development and Stem Cells Held at Tsinghua University

A Symposium on Cell Signaling in Cancer, Development and Stem Cells was held at Tsinghua on June 13-16, 2007 The symposium was co-organized by China＇s State Key Lab of Biomembrane and Membrane Biotechnology, the US National Institute of Health, the University of Chicago, and the Beijing Society for Cell Biology.

A TEACHER DEVELOPMENT PROJECT IN CHONGQING UNIVERSITY

This article reports on an on-going teacher development project in Chongqing University. The project, run by the College of Foreign Languages, is aimed at promoting professional development among its teachers, particularly new teachers, by adapting the reflective model of teacher development. It outlines the project framework and discusses the impact of the project on the teachers involved.

Global sensitivity and uncertainty analysis of the VIP ecosystem model with an expanded soil nitrogen module for winter wheat-summer maize rotation system in the North China Plain

Accurately simulating the soil nitrogen(N)cycle is crucial for assessing food security and resource utilization efficiency.The accuracy of model predictions relies heavily on model parameterization.The sensitivity and uncertainty of the simulations of soil N cycle of winter wheat-summer maize rotation system in the North China Plain(NCP)to the parameters were analyzed.First,the N module in the Vegetation Interface Processes(VIP)model was expanded to capture the dynamics of soil N cycle calibrated with field measurements in three ecological stations from 2000 to 2015.Second,the Morris and Sobol algorithms were adopted to identify the sensitive parameters that impact soil nitrate stock,denitrification rate,and ammonia volatilization rate.Finally,the shuffled complex evolution developed at the University of Arizona(SCE-UA)algorithm was used to optimize the selected sensitive parameters to improve prediction accuracy.The results showed that the sensitive parameters related to soil nitrate stock included the potential nitrification rate,Michaelis constant,microbial C/N ratio,and slow humus C/N ratio,the sensitive parameters related to denitrification rate were the potential denitrification rate,Michaelis constant,and N2 O production rate,and the sensitive parameters related to ammonia volatilization rate included the coefficient of ammonia volatilization exchange and potential nitrification rate.Based on the optimized parameters,prediction efficiency was notably increased with the highest coefficient of determination being approximately 0.8.Moreover,the average relative interval length at the 95% confidence level for soil nitrate stock,denitrification rate,and ammonia volatilization rate were 11.92,0.008,and 4.26,respectively,and the percentages of coverage of the measured values in the 95% confidence interval were 68%,86%,and 92%,respectively.By identifying sensitive parameters related to soil N,the expanded VIP model optimized by the SCE-UA algorithm can effectively simulate the dynamics of soil nitrate stock,denitrification rate,and ammonia volatilization rate in the NCP.