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Table of Content
20 November 2005 Volume 24 Issue 11
著者文摘
Metallic surface plasmon resonance
. 2005, 24(11): 1-1.
Abstract
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711
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490
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The mechanism of metallic surface plasmon resonance is analyzed explicitly. The plasmon frequencies of semi-infinite metal,metallic film and metal nanosphere are obtained with the Laplace＇s equation.
On the microscopic dynamical foundation of statistical mechanics
. 2005, 24(11): 5-5.
Abstract
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860
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561
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The basic starting point of statistics is the stochasticity of the underlying system. Macroscopic thermodynamic properties of different systems under different situations is originated from the diversity in the intrinsic stochasticity of these systems. Based on an exhaustive exploration of microscopic nonlinear dynamics of thermodynamic system,one can get a deeper understanding of a number of thermodynamic phenomena such as matter-state equations and phase transitions. In this paper, nonlinear dynamics of Hamiltonian systems and dynamical stochasticity in ergodic theory are analyzed. Our analysis indicates that global chaos is the essence for the validity of statistics. Infinite numbers of degrees of freedom and thermodynamic limit are not the decisive criterion for statistics. In torms of this few-body statistical mechanics and thermodynamics can be built.
A critical phenomenon simulation of phase transition of the 2D Ising model by cellular automaton
. 2005, 24(11): 10-10.
Abstract
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965
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592
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The cellular automaton model is used to simulate the critical phenomenon of the two dimensional Ising model. The diagrams of phase transition and space-time evolution are given. It is found that the critical temperature gotten through numerical simulation fits quite well with the theoretical value when there is no external field.
A discussion for the symbol of factorial-products βεi in probability function
. 2005, 24(11): 14-14.
Abstract
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882
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(289KB) (
323
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The products βεi be unnegative is without question in mathematics, but some scientists suspect this conclusion in physics.They regard that the products βεi is both positive and negative in probability function. In order to settle the suspects of the small but fundamental problem, we put forward this discussion for the symbol of products βεi.
A study of electrostatic field problems consisting of eccentric and separated charged cylindrical conductors with image method
. 2005, 24(11): 18-18.
Abstract
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1132
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516
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Based on the superposition principle and uniqueness theorem of electrostatic field, two kinds of electrostatic field boundary-value problems, consisting of two eccentric and separated charged cylindrical conductors,are solved by image method, and the analytical solution formulation of the field is derived.
Energy analysis of massive springs in series
. 2005, 24(11): 20-20.
Abstract
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944
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(195KB) (
433
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A general discussion of kinetic energy and elastic potential energy of springs in series is made on the occasion that the mass of spring can not be neglected. It turns out that kinetic energy of springs in series is not only related to spring mass ml, m2, but also spring constant kl ,k2, however, elastic potential energy is only decided by absolute elongation of springs in series and their elastic constants.
The frequency of an elastic rod connected to a particle
. 2005, 24(11): 23-23.
Abstract
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667
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(212KB) (
417
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The frequency equation of an elastic rod with one end fixed and the other connected to a massive particle is derived. Based on this equation, the frequencies with a series of mass ratios are calculated.
The relativistic transformation of an expanding spherical surface
. 2005, 24(11): 25-25.
Abstract
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791
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385
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An analysis of the relativistic transformation of an expanding spherical surface is made.
Comments on "relativistic theorem for the motion of center of mass"
. 2005, 24(11): 27-27.
Abstract
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1078
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(152KB) (
911
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The center of mass is not a certain concept in relativity theory. In relativistic mechanics, center of mass system is replaced by center of momentum system（the reference system in which the total momentum of a physical system equals zero）. The arguments and conclusions in the paper“Relativistic theorem for the motion of center of mass and the mass defect”are commented.
Electric displacement vector:from the perspective of Helmholtz's theorem
. 2005, 24(11): 28-28.
Abstract
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1027
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297
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From the perspective of Helmholtz＇s theorem, the inherent relationship between electric displacement vector and the source is made clear, and that the electric displacement vector is relevant to dielectric, polarization charge and the boundary conditions as well as the distribution of free charge is pointed out, putting emphasis on the prerequisites for interaction between electric displacement vector and the distribution of free charge.
Potential and electrical field created by a uniform charged disc
. 2005, 24(11): 31-31.
Abstract
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1513
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(260KB) (
1143
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According to the superposition principle, the series solution of the potential and electrical field created by a uniform charged disc are obtained.
A new kind explaination of polarization of Zeeman spectrum
. 2005, 24(11): 35-35.
Abstract
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1006
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(263KB) (
749
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According to the electromagnetic theory of light and the graphic method of vector, the characteristic of σ and π polarizations of the transition of atom is analyzed.
The ordinary accumulation for processing the data in physics experiment
. 2005, 24(11): 39-39.
Abstract
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766
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(199KB) (
441
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The ordinary accumulation method is introduced and applied to processing the linear regression in physics experiment. As compared with the conventional least square,the ordinary accumulation is not based on any assumption about the data,so it is more practical.
Measuring velocity of sound by using acoustic levitation
. 2005, 24(11): 42-42.
Abstract
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1109
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926
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A new method of measuring velocity of sound by using acoustic levitation is introduced. The conditions and the positions of objects suspending in air by vibrated sound wave within an acoustic resonator are analyzed and discussed in detail.
Single photon emission computed tomography
. 2005, 24(11): 45-45.
Abstract
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805
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(235KB) (
382
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The principle and image properties of single photon emission computed tomography are introduced.
The problems and their countermeasures of physics course in health science education
. 2005, 24(11): 48-48.
Abstract
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776
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(336KB) (
814
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According to questionnaire investigation of the current status of physics course teaching for medicine in 69 universities and colleges in China, four problems are turned out. Some countermeasures against these problems are advanced and the teaching reformation for physics course in health science education are discussed.
Dynamic demonstration of Fresnel single slit diffraction
. 2005, 24(11): 52-52.
Abstract
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942
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(273KB) (
536
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By designing a simple light beam expanding system and using computer technique a physics demonstration is developed that can demonstrate the distribution of light intensity of the Fresnel single slit diffraction reahimely.
MATLAB-based software of quantum mechanics for three-dimensional graphic designing and animated picture generating
. 2005, 24(11): 55-55.
Abstract
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891
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(377KB) (
478
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A comprehensive MATLAB-based software with the functions of three dimensional graphs designing and movie generating is developed to get more obvious static pictures and dynamic process in quantum mechanics. The software has more than forty different GUIs and provides circumspect services. It not only offers additional means of studying quantum mechanics to the students, but also gives better helps to the researchers in their work of computing and visualization technique.
Electromagnetic weapons
. 2005, 24(11): 59-59.
Abstract
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1707
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(392KB) (
1065
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The development of electromagnetic weapons is summarized and a new one called recoil gun, an electromagnetic accelerator is introduced.
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