The author firstly describes the main trends of contemporary American jurisprudence, and then points out R.Dworkin’s theoretical role in the academia. Secondly, the author also classifies what Dworkin thought about t...The author firstly describes the main trends of contemporary American jurisprudence, and then points out R.Dworkin’s theoretical role in the academia. Secondly, the author also classifies what Dworkin thought about the concept of law, and explains the inadequacy of Dworkin’s ideas.展开更多
A unified nonlinear strength criterion(i.e UNS criterion) is proposed,for the sake of versatility,to capture the complex strength behaviors of frictional materials in geotechnical field.It covers wide ranges on the me...A unified nonlinear strength criterion(i.e UNS criterion) is proposed,for the sake of versatility,to capture the complex strength behaviors of frictional materials in geotechnical field.It covers wide ranges on the meridian and octahedral planes to describe nonlinear strength behaviors of soils.The Modified Cam-Clay model,incorporating the unified nonlinear strength criterion,is employed as an example to derive working mathematical equations and to illustrate yielding surfaces in three-dimensional stress space for improving the model's predictive capability.The unified nonlinear strength criterion,demonstrated here,is capable of capturing the experimental results of different types of soils on the meridian and octahedral planes.In addition,the revised model,based on this unified nonlinear strength criterion,though very simple,is versatile to predict the true triaxial test results from literature when considering the influences of the intermediate principal stress on strength and deformation under complex stress conditions.展开更多
For a given polyhedron K contain M, the notation RM（K） denotes a regular neighborhood of K in M. The authors study the following problem： find all pairs （m, k） such that if K is a compact k-polyhedron and M a PL ...For a given polyhedron K contain M, the notation RM（K） denotes a regular neighborhood of K in M. The authors study the following problem： find all pairs （m, k） such that if K is a compact k-polyhedron and M a PL m-manifold, then RM（f（K））≌RM（g（K）） for each two homotopic PL embeddings f,g ： K→M. It is proved that Rs^k＋2（Sk）≌/ S^k × D^2 for each k≥2 and some PL sphere S^k contain S^k＋2 （even for any PL sphere S^k contain S^k＋2 having an isolated non-locally flat point with the singularity S^k-1 contain S^k＋1 such that π1（S^k＋1 - S^k-1）≌/Z）.展开更多
文摘The author firstly describes the main trends of contemporary American jurisprudence, and then points out R.Dworkin’s theoretical role in the academia. Secondly, the author also classifies what Dworkin thought about the concept of law, and explains the inadequacy of Dworkin’s ideas.
基金supported by the National Natural Science Foundation of China for Distinguished Young Scholar (Grant No. 50825901)the Public Service Sector R&D Project of Ministry of Water Resource of China (Grant No. 200801014)+1 种基金Scientific Innovation Research Scheme for Jiangsu University Graduate (Grant No. CX10B_207Z)Jiangsu Civil Engineering Graduate Center for Innovation and Academic Communication Foundation
文摘A unified nonlinear strength criterion(i.e UNS criterion) is proposed,for the sake of versatility,to capture the complex strength behaviors of frictional materials in geotechnical field.It covers wide ranges on the meridian and octahedral planes to describe nonlinear strength behaviors of soils.The Modified Cam-Clay model,incorporating the unified nonlinear strength criterion,is employed as an example to derive working mathematical equations and to illustrate yielding surfaces in three-dimensional stress space for improving the model's predictive capability.The unified nonlinear strength criterion,demonstrated here,is capable of capturing the experimental results of different types of soils on the meridian and octahedral planes.In addition,the revised model,based on this unified nonlinear strength criterion,though very simple,is versatile to predict the true triaxial test results from literature when considering the influences of the intermediate principal stress on strength and deformation under complex stress conditions.
基金Project supported by the Pierre Deligne Fund based on 2004 Balzan Prize in Mathematics,INTAS Grants(No.YSF-2002-393)the Russian Foundation for Basic Research(Nos.05-01-00993,04-01-00682,06-01-72551-NCNILa)+1 种基金President of the Russian Federation Grants(Nos.MD-3938.2005.1,NSH-1988.2003.1,MD-4729.2007.1)the Slovenian Research Agency(Nos.BI-RU/05-07-04,BI-RU/05-07-13).
文摘For a given polyhedron K contain M, the notation RM（K） denotes a regular neighborhood of K in M. The authors study the following problem： find all pairs （m, k） such that if K is a compact k-polyhedron and M a PL m-manifold, then RM（f（K））≌RM（g（K）） for each two homotopic PL embeddings f,g ： K→M. It is proved that Rs^k＋2（Sk）≌/ S^k × D^2 for each k≥2 and some PL sphere S^k contain S^k＋2 （even for any PL sphere S^k contain S^k＋2 having an isolated non-locally flat point with the singularity S^k-1 contain S^k＋1 such that π1（S^k＋1 - S^k-1）≌/Z）.
