Based on the value sensitivity of options to underlying and corresponding treaty clauses, this paper poses a measuring method of path dependence intensity, which breaks the setup where the path dependence intensity is...Based on the value sensitivity of options to underlying and corresponding treaty clauses, this paper poses a measuring method of path dependence intensity, which breaks the setup where the path dependence intensity is only classified roughly and which becomes a deep study on path-dependent options. Then, its feasibility, instructions, and application to compare the path dependence intensity of sorts of options will be discussed.展开更多
U.S. deposit insurance system has important and deep influence on the building and operating of the deposit insurance system for many countries in the world. Based on the analysis of the development stage and status q...U.S. deposit insurance system has important and deep influence on the building and operating of the deposit insurance system for many countries in the world. Based on the analysis of the development stage and status quo of the U.S. deposit insurance system, this paper suggests that China should learn from the experience of U.S. deposit insurance system, to build and perfect the laws of deposit insurance system, and the mandatory, the scope, the insurance premium, and the top insurance amount of the deposit insurance system should be stated, and the deposit insurance agencies should maintain their independence and restrain the moral hazard. Only in that way can the deposit insurance system of China be built and perfected.展开更多
The direct asymmetric aldol reaction between various aldehydes and acetone catalyzed by L-proline catalyst was successfully carried out in supercritical CO_(2) (scCO_(2)) and 1,1,1,2-tetrafluoroethane (R-134a) fluids....The direct asymmetric aldol reaction between various aldehydes and acetone catalyzed by L-proline catalyst was successfully carried out in supercritical CO_(2) (scCO_(2)) and 1,1,1,2-tetrafluoroethane (R-134a) fluids.The enantioselectivity of 84% ee to the targeted product was achieved under 20 MPa,40 °C,and 15 mol% of the catalyst in supercritical CO_(2) (scCO_(2)) fluid.The effects of reaction parameters,such as temperature,pressure,catalyst loading and different substituted aldehydes on both enantioselectivity and aldol yield were discussed.The titled reaction was also performed in 1,1,1,2-tetrafluoroethane,and the obtained results were compared with those in scCO2.This new reaction procedure provides an environmental asymmetric aldol reaction system as compared with that in organic solvents.展开更多
文摘Based on the value sensitivity of options to underlying and corresponding treaty clauses, this paper poses a measuring method of path dependence intensity, which breaks the setup where the path dependence intensity is only classified roughly and which becomes a deep study on path-dependent options. Then, its feasibility, instructions, and application to compare the path dependence intensity of sorts of options will be discussed.
文摘U.S. deposit insurance system has important and deep influence on the building and operating of the deposit insurance system for many countries in the world. Based on the analysis of the development stage and status quo of the U.S. deposit insurance system, this paper suggests that China should learn from the experience of U.S. deposit insurance system, to build and perfect the laws of deposit insurance system, and the mandatory, the scope, the insurance premium, and the top insurance amount of the deposit insurance system should be stated, and the deposit insurance agencies should maintain their independence and restrain the moral hazard. Only in that way can the deposit insurance system of China be built and perfected.
基金the National Natural Science Foundation of China (20976102)Specialized Research Fund for the Doctoral Program of Higher Education (20070718003)
文摘The direct asymmetric aldol reaction between various aldehydes and acetone catalyzed by L-proline catalyst was successfully carried out in supercritical CO_(2) (scCO_(2)) and 1,1,1,2-tetrafluoroethane (R-134a) fluids.The enantioselectivity of 84% ee to the targeted product was achieved under 20 MPa,40 °C,and 15 mol% of the catalyst in supercritical CO_(2) (scCO_(2)) fluid.The effects of reaction parameters,such as temperature,pressure,catalyst loading and different substituted aldehydes on both enantioselectivity and aldol yield were discussed.The titled reaction was also performed in 1,1,1,2-tetrafluoroethane,and the obtained results were compared with those in scCO2.This new reaction procedure provides an environmental asymmetric aldol reaction system as compared with that in organic solvents.
