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D-Dimensional Dirac Fermions BEC-BCS Crossover Thermodynamics

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Communications in Theoretical Physics 2007年第7期48卷 99-106页

作者： CHEN Ji-Sheng institute of Particle Physics & Physics Department,Central china Normal University,Wuhan 430079,china institute of Particle Physics & Physics Department Central China Normal University Wuhan 430079 China

An effective relativistic continuum massive Proca Lagrangian action is used to account for the Lorentzvector condensation effects on the equation of state of the strongly interacting fermions *** interior quantumfluctuation effects are incorporated as an external field approximation indirectly through a fictive generalized ThomsonProblem counterterm *** general analytical formulas for the d-dimensional thermodynamics are given nearthe unitary limit region,In the non-relativistic limit for d=3,the universal dimensionless coefficientε=4/9 andenergy gap △/ε_f=5/18 are reasonably consistent with the existing theoretical and experimental *** the unitarylimit for d=2 and T=0,the universal coefficient can even approach the extreme occasion ξ=0 corresponding to theinfinite effective fermion mass m~*=∞,which can be mapped to the strongly coupled two-dimensional electrons and isquite similar to the three-dimensional Bose-Einstein condensation of ideal boson ***,for d=1,the universalcoefficient ξ is negative,implying the non-existence of phase transition from superfluidity to normal *** solutionsmanifest the quantum Ising universal class characteristic of the strongly coupled unitary fermions gas.

关键词： unitary fermions thermodynamics BEC-BCS crossover statistical methods

KrF Laser-induced Damage to ZrO2/SiO2 Coatings

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Chinese Journal of Lasers 1995年第2期B4卷 161-168页

作者： WANG Naiyan GAO Huailin(china institute of Atomic Energy, P. O. Box 275-7, Bejijng 102413, china) china Inst of Atomic Energy Beijing China

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关键词： KrF laser coating laser-induced coating damage

Modern sea level changes of the Eastern china Seas and their influences on coastal areas

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Journal of Environmental Sciences 1992年第1期4卷 52-59页

作者： Liu ZhenxiaFirst institute of Oceanography, SOA, Qingdao 266003, china

The statistics of tidal gauging records showed that the mean sea level of the china Seas has risen for 14 cm in past 100 years. The annual mean sea levels of the Eastern china Seas have been rising at a speed of about 0.21 -0.23 cm/a since 1960. The annual mean sea levels of the Eastern china Seas in 1989 were 1.45 cm higher than that in 1988 on *** sea level rise may cause the damage of the dynamical balance of the natural environments in the coastal area? and form or strengthen many coastal disasters, such as storm-tide catastrophic events, sea water invasion landward, soil salinization in coastal lowland and plains, and beach erosion retreat.

关键词： sea level: Eastern china Seas coastal area.

SIMULATION STUDY OF GENERALIZED MINIMUM VARIANCE CONTROL FOR AN EXTRACTION TURBINE

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Chinese Journal of Mechanical Engineering 2003年第4期16卷 424-427,444页

作者： Shi XiaopingSimulation Center,Harbin institute of Technology,Harbin 150001, china Simulation Center Harbin Institute of Technology Harbin 150001

In an extraction turbine, pressure of the extracted steam and rotate speed of the rotor are two important controlled quantities. The traditional linear state feedback control method is not perfect enough to control the two quantities accurately because of existence of nonlinearity and coupling. A generalized minimum variance control method is studied for an extraction turbine. Firstly, a nonlinear mathematical model of the control system about the two quantities is transformed into a linear system with two white noises. Secondly, a generalized minimum variance control law is applied to the system. A comparative simulation is done. The simulation results indicate that precision and dynamic quality of the regulating system under the new control law are both better than those under the state feedback control law.

关键词： Extraction turbine Rotate speed Generalized minimum variance control Simulation

CHARACTERIZATION AND CONSTRUCTION OF LINEAR SYMPLECTIC RK-METHODS

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Journal of Computational Mathematics 1994年第2期12卷 101-112页

作者： Sun Geng (institute of Mathematics, Academia Sinica, Beijing, china) 中科院数学所北京

A characterization of linear symplectic Runge-Kutta methods, which is based on the W-transformation of Hairer and Wanner, is presented. Using this characterization three classes of high order linear symplectic Runge-Kutta methods are constructed. They include and extend known classes of high order linear symplectic Runge-Kutta methods.

关键词： RK CHARACTERIZATION AND CONSTRUCTION OF LINEAR SYMPLECTIC RK-METHODS high

ELTA-WAVE IN A SIMPLE 1-D 2 x 2 HYPERBOLIC PROBLEM

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Journal of Computational Mathematics 1996年第4期14卷 311-318页

作者： S.L. Yang(institute of Applied Mathematics, Chinese Academy of Sciences, Beijing, china) institute of Applied Mathematics Chinese Academy of Sciences Beijing China

A simple one-dimensional 2 x 2 hyperbolic system is considered in the *** model contains a linear hyperbolic equation, as well as a hyperbolic equation ofwhich the coefficients are about the solution of the linear one. The exact solution ispresented and discussed, then numerical experiments are given by TVD (or MmB)type schemes for Riemann problems. From the results, we know that the solutionsdo have δ-waves for some suitable initial data.

关键词： Zhang Figure DELTA-WAVE IN A SIMPLE 1-D 2 HYPERBOLIC PROBLEM

CONSTRUCTION OF HIGH ORDER SYMPLECTIC PRK METHODS

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Journal of Computational Mathematics 1995年第1期13卷 40-50页

作者： Sun Geng(institute of Mathematics, Academia Sinica, Beijing, china) 中科院数学所北京

In this paper three classes of high order symplectic partitioned Runge-Kutta (PRK) methods, which are based on the W-transformation of Hairer and Wanner, and a particular class of diagonally implicit symplectic PRK methods of arbitrarily high order, which are based on the composite algorithm, are constructed. In particular, the symplectically composite PRK methods of arbitrarily high order become explicit when applied to separable Hamiltonian systems.

关键词： PRK CONSTRUCTION OF HIGH ORDER SYMPLECTIC PRK METHODS Math

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B_c Meson Studies

高能物理与核物理 2002年第Z1期26卷 1-10页

作者： CHANG Chao-Hsi (institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, china) Inst. of Theor. Phys. Chinese Acad. of Sci. Beijing 100080 China

Our studies on the meson Bc arc briefly *** decays of the meson Bc to a P-wave charmonium Xc or hc are reported comparatively precisely because they are fresh

关键词：高能物理核物理增刊张肇西 B_c Meson Studies Rev

δ-WAVE FOR 1-D AND 2-D HYPERBOLIC SYSTEMS

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Journal of Computational Mathematics 1996年第3期14卷 256-262页

作者： S.L. Yang(institute of Applied Mathematics, Chinese Academy of Sciences, Beijing, china) 中科院应用数学所北京

Here a new kind of nonlinear wave, which is called δ-wave, is described by some high resolution difference solutions for Riemann problems of one-dimensional (1-D) and two-dimensional (2-D) nonlinear hyperbolic systems in conservation laws. Some phenomena are numerically shown for the solutions of Riemann problems for 2-D gas dynamics systems

关键词： Zhang WAVE FOR 1-D AND 2-D HYPERBOLIC SYSTEMS