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Table of Content
20 February 2010 Volume 29 Issue 2
著者文摘
Finite-size effects in ideal quantum gas
. 2010, 29(2): 1-1.
Abstract
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823
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356
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Based on the Euler-MacLaurin formula, the expressions of thermodynamic quantities of a finite-size ideal quantum gas are derived and the effects of the size of the system and the shape of the boundary are revealed. It is shown that the finite-size effects result in several novel characteristics such as the non-extensively of the system, the anisotropy of the pressure, and so on, which are different from those obtained under the thermodynamic limit condition.
A discussion on wave function at infinite farness
. 2010, 29(2): 3-3.
Abstract
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1201
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(177KB) (
558
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Based on the former work, the hypothesis in quantum mechanics in terms of three related problems the wave function at infinite farness equal to zero is discussed.
Analysis on ion movement and stability in Paul ion trap
. 2010, 29(2): 5-5.
Abstract
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1267
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(352KB) (
1328
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Paul ion trap is an important experiment equipment to store and study ion without Zeeman effect infection by magnetic field. Based on the structure of Paul ion trap adopted in experiment and the distribution character of electric field, this article educes the ion movement equation and resolves the equation, analyzes ion motions and ion storage stability, finally summarizes the study of ion motion. It is concluded that the movement in Paul ion trap is a resonance motion, primary frequency vibration and high-level frequency vibration.
Scale invariance on conical trumpet shell
. 2010, 29(2): 9-9.
Abstract
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949
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(256KB) (
420
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The scale invariance of conical trumpet shell is proved from experimental observation and theoretic study.
Physical analysis of cycloidal property
. 2010, 29(2): 11-11.
Abstract
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1004
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746
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This paper discusses the cycloidal property through a college entrance examination item, and leads to the nature of cycloid from the physical point of view by modeling the pure roll
Solving the KdV equation by the mapping method
. 2010, 29(2): 14-14.
Abstract
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841
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(248KB) (
444
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Using the mapping method, we obtain the physically meaningful solutions of the KdV equation in the forms of the solitary wave and the Jacobi elliptic functions. The figures of these solutions are displayed .
The time-average Poynting＇ s vector power density in moving medium interface with high speed
. 2010, 29(2): 17-17.
Abstract
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908
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(411KB) (
548
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By using the coordinate transformation, the relation of wave vector and electromagnetic fields between incidence, reflected and transmitted wave, we discuss in detail the rules of their time-average Poynting＇ s vector power density in moving medium interface incidence by plane electromagnetic wave.
The dynamic behavior of two-dimensional logistic system and the fractal characterization of strange attractors
. 2010, 29(2): 21-21.
Abstract
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946
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655
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The dynamic behaviors of the two-dimensional logistic system are analyzed and the fractal characterization of strange attractors is researched. By using phase maps, bifurcation graphics and Lyapunov exponent, the paper reveals the transition of two-dimensional logistic system from regularity to chaos. By using G-P algorithm, the correlation dimension and Kolmogorov entropy of strange attractors are calculated, so the fractal characterization of strange attractors is described qualitatively. By using escape time algorithm, the color general Mandelbrot-Julia sets of strange attractors are construeted, so the fractal characterization of strange attractors is described quantitatively. The results show that the fractal characterization of strange attractors is explained clearly when these methods are used altogether.
The relation between the probability density, probability flux and time for the harmonic oscillator
. 2010, 29(2): 26-26.
Abstract
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1169
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(476KB) (
846
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Taking into account the one-dimensional harmonic oscillator as an example, the time-dependence of the distribution of the probability density and probability flux are calculated for the non-stationary case. The essential features of these two physical quantities are also discussed.
The observation of beat wave and amplitude modulation wave using digital oscilloscope
. 2010, 29(2): 31-31.
Abstract
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1526
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(355KB) (
3150
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The beat wave and amplitude modulation wave is observed using digital oscilloscope. The principle and the characteristics of them are discussed.
The observation of beat wave and amplitude modulation wave using digital oscilloscope
. 2010, 29(2): 34-34.
Abstract
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941
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PDF
(279KB) (
540
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The beat wave and amplitude modulation wave is observed using digital oscilloscope. The principle and the characteristics of them are discussed.
Measuring specific rotation and concentration of the sucrose solution with light intensity equipment
. 2010, 29(2): 37-37.
Abstract
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876
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PDF
(375KB) (
964
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Introduced the use of light intensity distribution of test measured the rotation rate of sucrose solution and the concentration method of measurement of light intensity distribution of light intensity tester, using digital galvanometer collect data, and calculate the rotation through the Malus law degrees, and thus sucrose solution derived rotation rate and concentration, details of its measuring principle, and through example to illustrate the measurement method, and shows the experimental results.
Optimized shoot and reconstruction of holographic real image
. 2010, 29(2): 40-40.
Abstract
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931
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420
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Based on the basic theories of holography, the conditions of occurrence of holographic real image are analyzed. The scheme that the holographic real image is shot and reconstructed with normal and collimated laser beam is put forward. The experimental results suggest that the qualities of the holographic real image can be im- proved by using normal and collimated laser beam for shoot and reconstruction. In addition, the holographic real image is displayed in different scattering media, respectively, and the one meeting requirement is determined.
Reform and practice of different assessments for physical experimen-- Active effect of operation exam being the most obvious
. 2010, 29(2): 43-43.
Abstract
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805
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(411KB) (
710
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According to the reform and practice of the different assessments for physics experiments about the students of the photoeleetricity major in the grade 05, 06 and 07, we summarize that the final exam of the experiment course is very necessary. We suggest that the assessment means with operation and written examination is fitting. The active effect of the operation exam is the most obvious.
The aim, method and key point of the integration of college physics curriculum and teaching pattern
. 2010, 29(2): 47-47.
Abstract
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842
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(498KB) (
861
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The aim, method and key point of the integration of college physics curriculum and teaching pattern are .introduced. The integration changes the isolated actuality between teachers, students and curriculum. Thus the muhilayer and multiform cultivating mode of person with ability, and carries out the education ideas of study-orientation and teaching students in accordance with their aptitude are constructed.
Bilingual teaching research on quantum mechanics
. 2010, 29(2): 51-51.
Abstract
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806
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(304KB) (
667
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From quantum mechanics teaching practice, this article focus on problems which should be paid attention to bilingual teaching in quantum mechanics from three aspects including the choice of bilingual textbooks, teaching methods and means, examination and assessment.
Studio physics and the education of college physics -- An introduction to studio physics
. 2010, 29(2): 54-54.
Abstract
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949
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(312KB) (
943
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The article introduces a new teaching format of college physics, studio physics, which is successfully adopted in many US universities including MIT and Harvard University. In studio physics class, theoretical and experimental teaching are integrated. Evaluating shows that it not only intrigues students to explore actively, but improves the student ability of commanding basic concepts. For its success, studio teaching has been widely extended to many other courses such as chemistry and engineering program.
Studies on two unexpected phenomena from the Pohl resonance experiment
. 2010, 29(2): 57-57.
Abstract
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1170
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(352KB) (
741
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Two unexpected phenomena got from the experiment ＇ torsion pendulum of free and forced rotational oscillations using the Poht resonance equipment are analyzed. Mechanicl damping and nonlinear effects of coil spring are found to be mainly responsible for the unexpected phenomenon. Furthermore, unstable driving fre- quency under some conditions can be the possible explanation for the second unexpected phenomenon. The linear dynamical equations are modified to become a nonlinear equation whose numerical solution explains the unexpected phenomena successfully.
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