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Table of Content
20 June 2006 Volume 25 Issue 6
著者文摘
On the superposition principle of states in quantum mechanics
. 2006, 25(6): 1-1.
Abstract
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1042
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(409KB) (
1593
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The superposition principle of states in quantum mechanics formulated by Blokhintsev, Dirac and Landau are introduced and reviewed.
A research of the thermodynamic character for solids in any dimension
. 2006, 25(6): 5-5.
Abstract
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710
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PDF
(278KB) (
385
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The thermodynamic functions and heat capacity of solids in n-dimensional system are calculated accurately. When the temperature is extremely high or low, the results are discussed. The thermodynamic characters for solids in different dimensions are expressed uniformly by a set of formulas.
Value of the distribution function at walls of the container and the problems caused by it
. 2006, 25(6): 9-9.
Abstract
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730
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PDF
(242KB) (
280
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The value of the distribution function f at walls of the container is believed to be zero, if so the equilibrium distribution function will be discontinuous at walls and will cause unreasonable result. Therefore, it should not assume the value of f at walls of the container being zero in the derivation of the H theorem.
Study of the parameters influencing the period of a simple pendulum
. 2006, 25(6): 12-12.
Abstract
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957
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PDF
(275KB) (
771
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The parameters affecting the period of a simple pendulum are studied. The conclusions are that the more the oscillation angle, the size of the oscillating ball, the latitude degree of earth, the height of the object above ground, the coefficient of viscosity of medium, and the density of medium, the more the period; the more the latitude degree of the earth, the less the period relavant curves are given.
Study on the movement of bouncing ball
. 2006, 25(6): 16-16.
Abstract
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863
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PDF
(263KB) (
511
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Stability of the 2-D mapping is studied by using the principles and methods of nonlinear dynamics in different control parameter. Numerical results show that systems have variant properties in different control parameter.
Teaching velocity potential by analogy
. 2006, 25(6): 20-20.
Abstract
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779
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PDF
(289KB) (
432
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Analogy method is used in teaching velocity potential, and satisfactory effect is obtained.
On the application of three factor method in transient circuit
. 2006, 25(6): 24-24.
Abstract
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837
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PDF
(143KB) (
332
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Starting from the differential equation of the first order, the definition of the first order circuit and its time constant are discussed.
Jaynes-Cummings model in a system of two-level atom coupled the field with inverse operators
. 2006, 25(6): 26-26.
Abstract
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770
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PDF
(186KB) (
387
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By representation transform, the evolvement wave functions of the J-C model with two-level atom coupled to the inverse field operators are obtained in schroedinger and interaction representation respectively. The ratio vibration is also discussed when the mistuning quantity is zero.
Quantum operator methods associated with canonical transformation for 1D harmonic oscillator problem
. 2006, 25(6): 29-29.
Abstract
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1375
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PDF
(146KB) (
896
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The quantum operator methods associated with the canonical transformation are discussed around the Hamiltonian of 1D harmonic oscillator problems. The origin of energy quantum and the difference between energy quantum and phonons are also analyzed.
On general solutions of equations in mathematical physics
. 2006, 25(6): 31-31.
Abstract
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905
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(250KB) (
715
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It is illustrated that the method of general solution is more applicable than one might imagine for partial differential equations. It is also illustrated that, after some variation, the method of traveling wave can apply to situations of unbounded interval.
Application of virtual projection oscilloscope in the college physics demonstration experiments
. 2006, 25(6): 33-33.
Abstract
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718
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PDF
(323KB) (
451
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The virtual projection oscilloscope based on sound card and its operation methods are introduced, and some examples to illustrate the application in college physics demonstration experiments are presented.
The analyses of the Hg-green spectrum hyperfine structure and isotope shifts
. 2006, 25(6): 36-36.
Abstract
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907
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PDF
(287KB) (
1018
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In comparison the theoretical calculating results of hyperfine structure by the 546.1 nm Hg -green spectra with the experimental results, the magnetic dipole Am and electric quadrupole B0 of the atomic hyperfine structure are determined.
Mrs Mayer and shell model of the atomic nucleus
. 2006, 25(6): 40-40.
Abstract
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987
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PDF
(430KB) (
740
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Mrs Mayer＇s life and her main contributions to the development of physics are reviewed. We describe how she started from magic numbers, then set up the shell model of atomic nucleus. This paper explores the reasons for her success and discusses what inspiration we can draw from her.
The physics principle of high density information storage
. 2006, 25(6): 44-44.
Abstract
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845
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(391KB) (
822
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The physics principles of compact disk, magneto-optical disk and phase-change disk are discussed. The latest development of high density information storage is introduced and the near-field optical storage technique and super-REMS technology are taken as examples.
A bottleneck in modern physics teaching for engineering students
. 2006, 25(6): 49-49.
Abstract
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712
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PDF
(241KB) (
734
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The content of quantum mechanics should be reinforced in university physics teaching because of its proportion is very small. The bottleneck in quantum mechanics foundational teaching is operator and the relation between eigenvalue of operator and probability distribution of dynamical variables. The authors＇ new textbook and teaching practice breaking through the bottleneck.
An estimation for the effect to the rotation of the earth due to tide
. 2006, 25(6): 54-54.
Abstract
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834
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(239KB) (
689
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The mechanism of this effect is studied, a simple model is studied and thereby the degree of angular acceleration is calculated, the rationality of the assumptions are checked.
The states of surface electron in the quantum corral
. 2006, 25(6): 57-57.
Abstract
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745
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PDF
(299KB) (
352
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Using the model of two-dimensional infinite potential well, stationary Schroedinger equation is solved to find out the wave function. Based on the solution, the states of surface electrons in the quantum corral is discussed, and the computer simulation made by MATLAB 6.1 results in a good fit to data obtained experimentally.
Infinite ladder resisters calculation based on discrete Fourier transformation
. 2006, 25(6): 61-61.
Abstract
(
906
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PDF
(146KB) (
645
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A novel idea for calculation the infinite ladder resisters based on discrete Fourier transformation is presented.
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