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Direct CP violation in hadronic B decays

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Science china(Physics,mechanics & Astronomy) 2006年第3期49卷 357-366页

作者： HONG Bihai1,2 & Lü Caidian3 1. department of Physics, Lishui university, Lishui 323000,china 2. department of Physics, shanghai Jiaotong university, shanghai 200030, china 3. Institute of High Energy Physics, Beijing 100049,china department of Physics Lishui University Lishui 323000 China department of Physics Shanghai Jiaotong University Shanghai 200030 China Institute of High Energy Physics Beijing 100049 China

There are different approaches for the hadronic B decay calculations, recently. In this paper, we upgrade three of them, namely factorization, QCD factorization and the perturbative QCD approach based on kT factorization, using new parameters and full wave functions. Although they get similar results for many of the branching ratios, the direct CP asymmetries predicted by them are different, which can be tested by recent experimental measurements of B factories.

关键词： CP violation hadronic B decay factorization.

DIRECT EXMNSIONS FOR THE DISTRIBUTION FUNCTIONS AND DENSITY FUNCTIONS OF χ~2-TYPE AND t-TYPE DISTRIBUTED RANDOM VARIABLES

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Chinese Annals of Mathematics,Series B 1996年第3期17卷 289-300页

作者： ZHENG ZUKANG(department of Statistics & Operational Research, Fudan university, shanghai 299433, china) department of Statistics and Operational Research Fudan University Shanghai 299433 China

Suppose that Z1 , Z2,’’’ Zn are independent normal random variables with common meanμ and variance σ2. Then S2 and have distribution andtn-1 distribution respectively. If the normal assumption fails, there will be the remaindersof the distribution functions and density functions. This paper gives the direct expansions ofdistribution functions and density functions of S2 alld T up to o(n-1). They are more intuitiveand convenient than usual Edgeworth expansions.

关键词： Edgeworth expansion Distribution function Density function

A Heuristic Algorithm for the Two-Machine Flowshop Group Scheduling Problem

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Journal of Systems Engineering and Electronics 2002年第4期13卷 8-16页

作者： Wang Xiuli & Wu Tihua department of Automation, shanghai Jiaotong university, shanghai 200030, P.R. china department of Automation Shanghai Jiaotong University Shanghai 200030 P. R. China

This paper presents the two-machine flowshop group scheduling problem with the optimal objective of maximum lateness. A dominance rule within group and a dominance rule between groups are established. These dominance rules along with a previously established dominance rule are used to develop a heuristic algorithm. Experimental results are given and analyzed.

关键词： Group scheduling Flowshop Heuristic algorithm.

同方期刊数据库

An improved approach to the efficient construction of and search operations in motion graphs

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Science china(Information Sciences) 2012年第5期55卷 1042-1051页

作者： GAO Yan 1,CHEN ZhiHua 2,CHEN MinGang 3 & SHEN Yang 3 1 Software Engineering Institute,East china Normal university,shanghai 200062,china 2.department of Computer Science and Engineering,East china university of Science and Technology,shanghai 200237,china 3 department of Computer Science and Engineering,shanghai Jiao Tong university,shanghai 200240,china 1. Software Engineering Institute East China Normal University Shanghai 200062 China2. Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China3. Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

Motion graphs have been widely used as an effective technique in the synthesis of human *** synthesize well-formed motions,motion graphs require smooth transitions and good ***,the time and costs grow quadratically as the graph size *** this paper,we present a method to set up a hierarchical structure,called a structure *** coarse level of this graph models different motion categories and their transitions,and the fine level mainly captures different motion *** interpolation space method is used to improve the graph connectivity at the fine *** structure guides the establishment of a faster and more realistic graphical *** the building process,this structure also helps with searching the motion graph,by performing a traverse search and placing the findings into a direct look-up table or local search ***,when there is no direct link between the different motions,a navigation map is introduced to conduct an appropriate search path via a series of transition motion *** experimental results indicate that our approach could lower the computation time in construction and searching,while simultaneously providing a richer variety of motion styles.

关键词： motion graph structure table registration curve motion interpolation

Theorems about the Existence of Solutions to Problems with Nonlocal Initial Value

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Acta Mathematica Sinica,English Series 2001年第2期17卷 197-206页

作者： Yuan Di WANG department of Mathematics, shanghai university, shanghai 200436. P. R. china department of Mathematics Shanghai University Shanghai 200436 P. R. China

Recently much work has been devoted to nonlocal problems. However, very little has been accomplished in the literature for nonlocal initial problems with nonlinear boundary conditions. It is the purpose of this paper to prove the existence results for solutions to a semilinear parabolic PDE with linear homogeneous boundary conditions, and to other ones with nonlinear boundary conditions, provided the ordered upper and lower solutions are given. Semigroup, fractional order function spaces and generalized Poincare operators play an important role in proving the existence of solutions.

关键词： Nonlocal problem Nonlinear boundary condition Palabolic equation Solution Existence Generalized Poincaree operator

Chen's Theorem with Small Primes

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Acta Mathematica Sinica,English Series 2002年第3期18卷 597-604页

作者： Ying Chun CAI department of Mathematics, shanghai university, shanghai 200436. P. R. china department of Mathematics Shanghai University Shanghai P. R. China

Let N be a sufficiently large even integer. In this paper it is proved that the equation N=p+P_2, p≤N^(0.95), is solvable, where p denotes a prime and P_2 denotes an almost prime with at most two prime factors.

关键词： Chen's theorem Sieve Mean value theorem

ON THE APPROXIMATELY SIMILARITY OF OPERATORS

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Chinese Annals of Mathematics,Series B 1998年第4期19卷 465-472页

作者： WEI GUOQIANG (department of Mathematics, East china Normal university, shanghai 200062, china.) E china Normal Univ Dept Math Shanghai 200062 Peoples R China

The author shows that a rank-preserving *-isorporphism between separable C*-algebras with unity is approximately equivalent to the identity representation. Some applications are made for approximately similarity of n-... 详细信息

关键词： C*-algebra Rank-preserving *-isomorphism Approximately equevalent,Approximately similar n-tuples of operators

THE STABILITY ANALYSIS OF THE θ-METHODS FOR DELAY DIFFERENTIAL EQUMIONS

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Journal of Computational Mathematics 1996年第3期14卷 203-212页

作者： H.J.Tian J-X.Kuang(department of Mathematics, shanghai Normal university, shanghai, china) shanghai NORMAL UNIV DEPT MATH SHANGHAI PEOPLES R CHINA

This paper deals with the stability analysis of θ-methods for the numericalsolution of delny dmerential equations (DDEs). We focus on the behavioux of suchmethods in the solution of the linear test equation y'(t) = a(t)y(t) + b(t)y(t - T),where T > o, a(t) and b(t) are functions from R to C. It is proved that the linearθ-method and the one-leg θ-method are TGP-stable if and only if θ = 1.

关键词： METHODS FOR DELAY DIFFERENTIAL EQUMIONS THE STABILITY ANALYSIS OF THE Math

Model test of the tunnel subjected to high water pressure in Jinping Second Cascade Hydropower Station,china

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Science china(Technological Sciences) 2011年第S1期54卷 192-198页

作者： WANG JianXiu 1,2,FENG Bo 2,HU LiSheng 2,TIAN PuZhuo 2,SUI DongChang 2,TANG YiQun 1,2 &YANG Ping 1,2 1 Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji university,shanghai 200092,china 2.department of Geotechnical Engineering,Tongji university,shanghai 200092,china 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji University Shanghai 200092 China2. Department of Geotechnical Engineering Tongji University Shanghai 200092 China

In the area with high groundwater pressure,grout curtain is often adopted to reduce the water pressure on tunnel lining.A series of model tests for the diversion tunnel of the Jinping Second Cascade Hydropower Station,china,is designed to study the effect of grout *** impact of the thickness of grout curtain,permeability of grout curtain,internal water pressure and drainage inflow on the distribution of water pressure are *** results indicates that under un-drained condition,water pressure is equal to hydrostatic one no matter grout curtain is selected or not,water pressure under drained condition is far less than that of un-drained condition,drainage in tunnel can reduce tunnel water pressure *** same inflow,both increasing of thickness and decrease of hydraulic conductivity of grout curtain can reduce water pressure *** the same water pressure,the smaller inflow of grout curtain,the less volume of water to be *** impact of hydraulic conductivity of grout curtain is more obvious than that of *** increasing of internal water pressure,the water pressure of grout curtain increases too,and the water pressure increases nearly *** proposed thickness of grout curtain for the diversion tunnels is 16 m.

关键词： tunnel grout curtain water pressure model test