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Table of Content
20 August 2008 Volume 27 Issue 8
著者文摘
Discussion on the state equation of the ideal gas＂pV = NkB T＂
. 2008, 27(8): 1-1.
Abstract
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1139
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(323KB) (
565
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The state equation of the ideal gas is studied by using the statistical physics method, which is rewritten as ＂pV=NkBT（ 1 ＋△） ＂, however, it is not the form pV = NkBT. The quantum statistical connection for the quantum molecules is discussed.
Interference with an anisotropic medium parallel plate
. 2008, 27(8): 6-6.
Abstract
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711
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PDF
(231KB) (
273
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A calculation method for phase difference in interference with an anisotropic medium parallel plate is proposed. It has been proved that fringes of extraordinary waves are ellipses. The ratio of two semi-axes of the ellipse is equal to the ratio of two principal refractive indices. The experiment with a lithium niobate crystal has been completed and which is in agreement with the theoretical result.
Stark effect on the 1s2s configuration of helium atom
. 2008, 27(8): 9-9.
Abstract
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847
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(277KB) (
419
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The Stark effect on the 1s2s configuration of helium atom is calculated to the second order based on the effective Hamihonian theory. The result shows that the energy levels in the 1s2s configuration of helium atom shift nonlinearly according to the intensity of electric field.
Two solving methods for symmetrical four-oscillators system with normal vibration
. 2008, 27(8): 13-13.
Abstract
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659
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PDF
(133KB) (
735
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The normal vibration frequency of symmetrical coupled-four-oscillators system is obtained by using both of the algebraic and uncoupling analysis methods.
Bernoulli＇ s equation for compressible flow
. 2008, 27(8): 15-15.
Abstract
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1552
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PDF
(329KB) (
2670
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The extreme volume of air pressure in liquid storage tank during injection process is derived based on the Bernoulli＇ s equation for compressible flow.
Calculation of the self inductance of elliptic cylinder electric cable per unit length
. 2008, 27(8): 19-19.
Abstract
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627
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PDF
(138KB) (
364
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The self inductance of elliptic cylinder electric cable per unit length is calculated by using the transform of Roucofeskie＇s conversion in the complex coordinate system,and the result is also discussed.
Discussion on methods of two and electric field of an kinds for calculating capacitance unparallel-plate capacitor
. 2008, 27(8): 21-21.
Abstract
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2332
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PDF
(225KB) (
1624
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The methods of two kinds for calculating the capacitance and electric field between an unparallelplate capacitor are presented： the one is by using the concept of parallel plate capacitor and the formula of capacitors connected in parallel, another is by using the electric energy formulae of an electric field and a capacitor with charges. It is found in comparison with the two methods that the second method is stricter, simpler, clearer and more innovative.
Discussion on the particle density and granule current density operators of several kinds
. 2008, 27(8): 24-24.
Abstract
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1001
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PDF
(270KB) (
696
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The related operators of several kinds are analyzed and their nature and reciprocity are discussed from the particle and granule current densities. The appropriate forms of the particle density and granule current density operators are determined according to the concrete physical significance.
Applications of the spin exchange operator in quantum mechanics
. 2008, 27(8): 28-28.
Abstract
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951
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PDF
(278KB) (
1172
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The applications of the spin exchange operator in quantum mechanics are discussed based on its properties. This method provides a convenient approach for the coupled system of two-body spin.
Experimentat Study on the two-step linearization method based on thermistance bridge thermometer
. 2008, 27(8): 31-31.
Abstract
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555
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PDF
(338KB) (
494
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The two-step linearization method for the nonlinear problem is introduced based on the thermistance bridge thermometer, and the analytical expression of linear equation, maximum nonlinear error and maximum error of temperature measurement for several typical plan of which are deduced. The optimal plan of which is also given and the step used to determine the bridge parameters of several typical plan of which is introduced. Both the theoretical analysis and experimental result show that the two-step linearization method is correct. The optimal plan of which is less than about 1.4℃ of the method of one-step linearization for the temperature range from 25℃ to 85℃.
Research on holograph grating experimental system with high quality
. 2008, 27(8): 35-35.
Abstract
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644
)
PDF
(214KB) (
758
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Theoretical analysis of holographic grating and a new experimental system of high quality holographic gratings are presented based on the important station of holographic gratings in the information optic and spectrometer. The predominance of this experimemal system lies in that the Gaussian light beams coming from the laser can be changed into uniform plane light wave and used as a source for making high quality holographic gratings.
A demo experiment for optical vector-matrix multiplicator teaching
. 2008, 27(8): 38-38.
Abstract
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834
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PDF
(346KB) (
336
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In order to make the parallel computing capability of the light and the realization ways more clearly for the students during the optical computing course teaching, we propose a simple teaching demo experiment. The optical core of the experiment is a 4 × 4 optical vector-matrix multiplicator, which consists of some pieces of LED arrays, photoelectric diodes and lens. The demo experiment lays out the basic function and make up of the parallel optical computing system, which are helpful for excite the interest of the students in learning the course.
How to produce the formula of Lorentz force
. 2008, 27(8): 42-42.
Abstract
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885
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PDF
(243KB) (
848
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How was the formula of Lorentz force produced in 1892 when electron had not been discovered and no any evidence had been given？ After recalling the argument between action with distance and action without distance as well as the argument of ＂what electricity was＂ in the history of electromagnetics, we point out that the formula of Lorentz force is the product of combination the electromagnetic field with ＂electricity is charged particle＂. Any magnetic force is the one of magnetic field acting on a moving charged particle, i. e. , the Lorentz force.
Establishing a student teaching assistant system to increase quality of experimental teachings
. 2008, 27(8): 45-45.
Abstract
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550
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PDF
(250KB) (
697
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In view of the current questions of experimental teachings, we establish a student assistant system. The method, function and production of this system are discussed.
Practice and exploration of the experimental teaching combining with scientific research
. 2008, 27(8): 48-48.
Abstract
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585
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PDF
(344KB) (
439
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The contents and results of study on the electrical properties of ZnO thin films varistor were introduced into the experimental teaching including the research-based professional physical experiments, public elective experiments, USRP activities and subjects of college physics contest. We have being explored on the combining teaching with scientific researching, which can well train students with the practice ability, creative ability and the idea and method of scientific researching.
Development of intelligent interference fringes counter
. 2008, 27(8): 52-52.
Abstract
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576
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PDF
(232KB) (
518
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The design and applications of the intelligent interference fringes counter is introduced. The experiment of linear expansion coefficient testing has proved the counter can work automatically. Exact counting, better anti-jamming, cheapness and other merits is obtained.
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