美国次贷金融衍生产品结构与风险传导路径

美国源于次贷支持证券的金融危机是百年一遇的危机。本文认为次贷金融衍生产品,呈现类似扇型的结构具有典型的风险传导路径。这种结构便于风险的累积、扩大和传递,是金融危机的根源。本文探讨了美国次级抵押贷款资产证券化产品的风险特征,并提出有力的监管措施。

琵琶沿革及演奏方法的演进

通过对古代乌德──琵琶形制变革,演奏姿势及方法演进的研究,论证我国古代人民是如何引进、消化、改革这一外国乐器,使之成为我国最具民族特点的乐器之一,也是彪炳于世界乐器之林中最富于表现力的乐器之一。

Numerical simulation investigations of energy-saving diffuser of main fan

Based on the boundary condition of field engineering, numerical simulations of28 conditions of existing diffusers of 3 structure types were investigated by ComputationalFluid Dynamics software package, and there were the problems of larger structure resistanceand lower diffusing efficiency of these diffusers by analysis of CFD results.Thestructure outlines of the energy-saving diffuser were constructed by the application ofstream function and potential function superimposing.On the basis of numerical simulationsof energy-saving diffusers of 5 area-enlarging ratios, structural resistances and diffusingefficiencies of 5 energy-saving diffusers were comparatively analyzed, and therange from 2.00 to 2.31 of the rational area-enlarging ratio of energy-saving diffusers wasderived.The optimization area-enlarging ratio of the energy-saving diffuser was presently2.28 through comparable analysis.From the above, the results show that the coefficient ofperformance of the energy-saving diffuser is better than 3 existing diffusers.

通过“染色问题”,培养中学生化归思维

本文在解决扇型结构染色问题的基础上,深入探讨如何将其他的染色问题化归为扇形结构染色问题,引导读者深入理解化归思维的内涵与实质。通过实例展示了在问题解决过程中,人们是如何通过化归思维来实现"化难为易、化繁为简、化陌生为熟悉"的。