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Table of Content
20 May 2010 Volume 29 Issue 5
著者文摘
Application of complex network theory to university physics teaching
. 2010, 29(5): 11-11.
Abstract
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641
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(363KB) (
320
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In recent years, the complex network becomes a hot spot domain in the research of complexity, and has the close relationship with the physical development. It is of great benefit to let the student understand the basic concepts, methods and the relationship between physics of this domain. In this paper, we introduce the basic concepts and the methods of complex networks, and solve two typical problems in physics teaching by means of the concepts and methods of complex networks.
An equivalence proving for the chiral media constitutive equation
. 2010, 29(5): 15-15.
Abstract
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612
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(248KB) (
421
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Several forms of constitutive equations are put forth on the study of chiral media. Because of the difference of the expression and symbol, it is easy to bring forth misunderstand and confuse in the application. In this paper the common expressions of constitutive equation of four kinds are given and the relation of the four forms are derived in terms of the electromagnetic theory.
Nonextensive statistical mechanics and the statistical distribution in completely open systems
. 2010, 29(5): 17-17.
Abstract
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837
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(536KB) (
935
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Tsallis＇ statistics is simply introduced in the nonextensive statistical mechanics. Complete gases is discussed by using the Tsallis＇ statistics. The statistical distributions for completely open systems are simply derived by the Shannon＇ s entropy contained a nonextensive constant of entropy and Tsallis＇ entropy for the nonextensive statistical mechanics.
Dynamic rotation vector applied to spring oscillator under air damping and sliding friction
. 2010, 29(5): 23-23.
Abstract
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731
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(388KB) (
422
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A dynamic rotation vector, including its starting point, length and phase change according to certain rules, is used to research the vibration of spring oscillator under sliding friction and air small damping. The vibration of spring oscillator is also studied under sliding friction and critical air damping （ or large air damping） , the curves of four kinds are given according to the initial value and damping. Four phase diagrams and phase diagram rotation vector of spring oscillator are analyzed.
A comparative study for diffraction pattern of ultrasonic grating and plane transmission grating
. 2010, 29(5): 27-27.
Abstract
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1161
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(332KB) (
479
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The formation mechanism of ultrasonic grating is analyzed, analytical expression for the light intensity distribution of diffraction pattern of ultrasonic grating is derived, as well as a comparative study of diffraction pattern of ultrasonic grating and plane transmission grating is given by theoretical analysis and numerical simulation. The results show that the diffraction principal maximum satisfies the similar grating equation, but the intensity distribution of the pattern is different, capable of generating the phenomenon of missing order, but the law is different, and the ultrasonic grating is a dynamic grating, the frequency of every diffraction fringe is also different.
Discussion on location of projectile point of satellite on elliptic orbit
. 2010, 29(5): 30-30.
Abstract
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654
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(310KB) (
352
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This article presents a detailed analysis about the equations of the artificial earth satellite＇ s elliptical orbit around earth and the position of satellite projectile points in the elliptical orbit in a variety of situations.
The minimum work for picking out an object from water in a container
. 2010, 29(5): 34-34.
Abstract
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641
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(156KB) (
506
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This article presents a simple method and formula for calculating the minimum work for picking out an object from water in a container.
The removal of the degeneracy of the low energy levels of a hydrogen atom in the electromagnetic field of the same direction
. 2010, 29(5): 36-36.
Abstract
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648
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(235KB) (
386
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The low levels of a hydrogen atom were removed by the effect of the electromagnetic field of the same direction.
Principle of high resolution soft X-ray microscopy formation and its application
. 2010, 29(5): 38-38.
Abstract
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805
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(391KB) (
1550
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The soft X-ray microscopy has unique advantages in the study of micrographs of hydrated biological samples with high resolution and low radiation damage. At present it has become special tool in the research of ultra microcosm of life sciences and biology. In this paper the principle and application of high resolution soft X-ray microscopy based on zone plate are brief presented.
Solving thermal dynamic distribution for a cell in optical trap by the concept of excursion and diffusion
. 2010, 29(5): 42-42.
Abstract
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654
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(273KB) (
500
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A dynam density distribution for a Boltzmann distribution, ical method based on the cell driven by a thermal is available for the concept of excursion and diffusion is used to solve the probability noise in an optical trap. The result shows that the cell obeys the force calibration of commonly shape or anisotropic bio-cells.
An assessments of physical education research
. 2010, 29(5): 44-44.
Abstract
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489
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(475KB) (
671
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Scientifically qualitative and quantitative assessment methods are important in the research. Recently, the general international education assessment tests with different objects content surveys, attitude surveys and scientific reasoning ability surveys. We have used several physical education including physical tests introduced to assess the physical education in different countries.
Investigation on measuring the local latitude based on a FOG north seeker
. 2010, 29(5): 48-48.
Abstract
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706
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(447KB) (
413
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The fiber-optic gyroscope （FOG） can be used to measure the size of its axial velocity. Using this sensitivity, we measure the north of the earth and the latitude of laboratory. The experiments of FOG north seeker are introduced briefly. The article focuses on two different definitions of latitude and analyze calculation results. We also discuss the relationship between the method of current international common calculating latitude and the Chinese general method, and give the conversion between them.
Application of MRI to measurements of liquid-solid-liquid contact angles
. 2010, 29(5): 53-53.
Abstract
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701
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(502KB) (
501
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This paper describes the measurements of the contact angles of wate-glass-oil and water-glass-benzene which is hard with optical ways with nuclear magnetic resonance imaging technique. The result is curve-fitted and the angles are calculated by the Matlab. This is the first time that the measurement of contact angles with MRI is introduced, it may lead to further applications of liquid-solid-liquid and gas-solid-liquid contact angles measurements.
The modification of Malus law experimental for depolarized polaroid and verification
. 2010, 29(5): 58-58.
Abstract
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1365
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(392KB) (
2190
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Considering the depolarization of polarizer, the Malus law is extended and the physical model of transmitted light intensity of natural light through two non-ideal polarizers is established and tested. The experimental results show that the physical model coincides well with the experimental data and has significantly reduced the experimental error, which is only about 5% , in the general physics experiment ＂Verification of Malus Law＂. The principle of this model is simple and the physical image is very clear, so it is a good simplified model coincidence well with the experiment. It can help to reduce laboratory maintenance costs, broaden students critical thinking and cultivate students the quality of innovation.
Developing creative ability and re-exploring for discoveries in the history of physics
. 2010, 29(5): 62-62.
Abstract
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577
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(440KB) (
667
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We discuss the problem to develop the creative ability of students by means of the history of physics. There are many good materials in the history of physics, and these materials need to be processed to form the case suitable to the students in China today.
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