The effect zones of layer face for RCC （rolled control concrete） dam have gradual change characteristics. Based on the analysis thought of complex material, a model was built to analyze above principle of RCC dam by...The effect zones of layer face for RCC （rolled control concrete） dam have gradual change characteristics. Based on the analysis thought of complex material, a model was built to analyze above principle of RCC dam by use of series-wound and shunt-wound connection. Some methods were proposed to determine the instantaneous Young＇s modulus, delayed Young＇s modulus and viscosity coefficient of effect zones of layer face. Above models and methods were used to mine the principle of gradual change of key calculation parameters which can response the characteristics of effect zones. The principle of gradual change was described. A model was established to analyze the threedimensional viscoelastic problem of RCC dam. Above programs were developed. The examples show that the proposed models and methods to determine the key calculation parameters of effect zones can reflect the status of RCC dam accurately.展开更多
In this paper, a strong 1TCZ process and an 1TCZ - absent process during FGGE in 1979 were selected for comparison to explore how they were subject to the influence of the evolution of the upper easterly jets.
A trial test method is introduced to form and magnify regular interface. Through researching on the carbonation of the magnifying interfacial transition zone （ITZ）, the practical carbonation of the concrete can be s...A trial test method is introduced to form and magnify regular interface. Through researching on the carbonation of the magnifying interfacial transition zone （ITZ）, the practical carbonation of the concrete can be simulated. Because the diffusion rate of CO2 in the ITZ is several times greater than that in the bulk paste, the diffusion rate and direction of CO2 will change and form a new carbonation front line. An interfacial effect zone caused by the ITZ will change the distribution of the complete carbonation zone and the partial carbonation zone. One of the important reasons for the formation of the partial carbonation zone was the existence of the interfacial effect zone. Consequently, the method mentioned in this paper provides a new way for researching on the microstructure of the cement based materials during the carbonation process.展开更多
The Renminbi(RMB)exchange rate regime reform has gone through three stages roughly once every decade since 1994.It is a structural evolution through the unification of dual exchange rates,increased fluctuations and ce...The Renminbi(RMB)exchange rate regime reform has gone through three stages roughly once every decade since 1994.It is a structural evolution through the unification of dual exchange rates,increased fluctuations and central parity rate reform in response to the dynamic macro environment in China and abroad.This paper unpacks leading and supporting reforms for each stage and reviews the effects.The reform has developed historical experience in adopting progressive strategies,avoiding sharp exchange rate fluctuations in the near term,maintaining appropriate capital controls,and guaranteeing the reform through domestic structural reforms.Achieving a free-floating exchange rate will be the ultimate goal,but it will not be made easily in the short run.During the transitional period,it is recommended that an annual target zone for RMB's effective exchange rate be arranged for the CFETS currency basket,along with necessary capital controls.展开更多
基金Project supported by the National Natural Science Foundation of China (Nos.50579010, 50539010)the National Basic Research Program of China (973 Program) (No.2002CB412707)the National Basic Research Program of Ministry of Water Resources, China (No.CT200612)
文摘The effect zones of layer face for RCC （rolled control concrete） dam have gradual change characteristics. Based on the analysis thought of complex material, a model was built to analyze above principle of RCC dam by use of series-wound and shunt-wound connection. Some methods were proposed to determine the instantaneous Young＇s modulus, delayed Young＇s modulus and viscosity coefficient of effect zones of layer face. Above models and methods were used to mine the principle of gradual change of key calculation parameters which can response the characteristics of effect zones. The principle of gradual change was described. A model was established to analyze the threedimensional viscoelastic problem of RCC dam. Above programs were developed. The examples show that the proposed models and methods to determine the key calculation parameters of effect zones can reflect the status of RCC dam accurately.
文摘In this paper, a strong 1TCZ process and an 1TCZ - absent process during FGGE in 1979 were selected for comparison to explore how they were subject to the influence of the evolution of the upper easterly jets.
基金Funded by the National Natural Science Foundation of China(No.51178103)
文摘A trial test method is introduced to form and magnify regular interface. Through researching on the carbonation of the magnifying interfacial transition zone （ITZ）, the practical carbonation of the concrete can be simulated. Because the diffusion rate of CO2 in the ITZ is several times greater than that in the bulk paste, the diffusion rate and direction of CO2 will change and form a new carbonation front line. An interfacial effect zone caused by the ITZ will change the distribution of the complete carbonation zone and the partial carbonation zone. One of the important reasons for the formation of the partial carbonation zone was the existence of the interfacial effect zone. Consequently, the method mentioned in this paper provides a new way for researching on the microstructure of the cement based materials during the carbonation process.
基金funded by the Center for Modern Financial Studies under Shanghai Jiao Tong University,presents the latest progress in CASS's innovation project on Development Trends and Interconnections of Global and Chinese Financial Markets.
文摘The Renminbi(RMB)exchange rate regime reform has gone through three stages roughly once every decade since 1994.It is a structural evolution through the unification of dual exchange rates,increased fluctuations and central parity rate reform in response to the dynamic macro environment in China and abroad.This paper unpacks leading and supporting reforms for each stage and reviews the effects.The reform has developed historical experience in adopting progressive strategies,avoiding sharp exchange rate fluctuations in the near term,maintaining appropriate capital controls,and guaranteeing the reform through domestic structural reforms.Achieving a free-floating exchange rate will be the ultimate goal,but it will not be made easily in the short run.During the transitional period,it is recommended that an annual target zone for RMB's effective exchange rate be arranged for the CFETS currency basket,along with necessary capital controls.
