Loading...
NianQi Search
Quick Search
Advanced Search
Toggle navigation
Home
About Journal
Editorial Board
Instruction
History
Indexed in
Subscription
Contact Us
中文
Office
Office
Submission/Manuscript
Peer Review
Editor Work
Office Work
Editor-in-Chief
Journal
Just Accepted
Current Issue
Archive
Advanced Search
Most Read
Most Download
E-mail Alert
RSS
Wechat
Table of Content
20 September 2012 Volume 31 Issue 9
著者文摘
Beyond Leibnitz calculous and Newton mechanics
. 2012, 31(9): 1-1.
Abstract
(
980
)
PDF
(533KB) (
544
)
Related Articles
|
Metrics
The origin, determination and examples mean of frictional velocity is analyzed. The dissipation shown for the fractional derivatives are introduced and the physical of frictional oscillator is discussed and some applications are
Suppersymmetric method for the solution of Schrōdinger equation of harmonic oscillator
. 2012, 31(9): 7-7.
Abstract
(
1108
)
PDF
(272KB) (
523
)
Related Articles
|
Metrics
By constructing the supersymmetric system which Hamiltonian commutates with that of harmonic os-cillator, the properties of harmonic oscillator can be obtained through the investigation of supersymmetric system. Based on the property of supersymmetric system, the recursion relation between the expanding parameter in the ei-genfunction of harmonic oscillator is obtained without using the theory of Hermite polynomials, then the eigenfunc-tion can be directly found from the recursion relation. The normalized eigenfunction obtained is actually the same as that represented through Hermite polynomials, and the parity of the eigenfunction can be evidently exhibited.
Wave functions for the （np）^3 electron configuration
. 2012, 31(9): 10-10.
Abstract
(
903
)
PDF
(454KB) (
499
)
Related Articles
|
Metrics
Based on the asymmetric wave functions for fermion and symmetry of raising operator and lowering operator, the wave functions of the （np）^3 electron configuration for LS coupling are discussed by using the second quantization from Pauli＇s exclusion principle.
The general proof of completeness of eigenfunction of Hermitian operators
. 2012, 31(9): 16-16.
Abstract
(
1724
)
PDF
(359KB) (
1601
)
Related Articles
|
Metrics
Starting from a set of completed eigenfunctions, we build a phenomenological formula under the rep-resentation principle, and then the completeness of eigenfunction of the Hermitian operators is proved by reduction to absurdity. This set of completed eigenfunctions of mechanical quantities can be projected onto the eigenfunctions of operator space, which gives the general proof of completeness of eigenfunctions of operators.
Magnus effect and the motion of falling diabolo
. 2012, 31(9): 19-19.
Abstract
(
948
)
PDF
(273KB) (
1163
)
Related Articles
|
Metrics
Magnus effect is introduced zontal axes is investigated. It is compared charged ball in horizontal magnetic field simply and then the motion of falling with the motion of falling body near diabolo which rotates on the earth＇s equator and an hori-of falling
Modulation and demodulation analysis of the laser holography
. 2012, 31(9): 22-22.
Abstract
(
760
)
PDF
(301KB) (
362
)
Related Articles
|
Metrics
In analogy with the amplitude modulation-demodulation of the signal, we demonstrate the laser ho-lography from the modulation and demodulation of the information angle. We use this analogy to describe the infor-mation of the optical path difference modulated by the two-beam interference and the slit width information demodu-lated by the optical diffraction pattern.
A simple fast method in solving nonlinear transmission line equation
. 2012, 31(9): 25-25.
Abstract
(
752
)
PDF
(257KB) (
476
)
Related Articles
|
Metrics
The sine-cosine method is used to construct periodic and soliton solutions of nonlinear transmission-line equation. It is shown that the method is simple, effective and can be used for many other nonlinear equations.
Minkowski＇ s geometrical analysis of the ＂Twin Paradox＂ and discussion of result
. 2012, 31(9): 27-27.
Abstract
(
1383
)
PDF
(268KB) (
1629
)
Related Articles
|
Metrics
Twin effect is resolved by using two-dimensional plot in the Minkowski＇ s four-dimensional space time, it also comes to a quantitative analysis of the earthmen＇ s age jump caused by the isochrone＇ s jump which is the consequence of spacecraft＇ turning in particular. Then there comes to an absolute conclusion of those who came through the accelerated movement of the spacecraft are younger than their twins who lives on the earth which is thought as an inertial system. In the end, the discussion of the results supported by the numerical calculation gives the specific observations on the spacecraft in the round trip and the whole system in two different references.
Relativistic mass in teaching of college physics
. 2012, 31(9): 30-30.
Abstract
(
761
)
PDF
(282KB) (
604
)
Related Articles
|
Metrics
The mass conservation equation, which is the misunderstood core in deviation of relativistic mass in textbook of college physics, is analyzed. The more reasonable derivation is given by introducing two-dimensional movement.
Development of a teaching laboratory on electron optics
. 2012, 31(9): 32-32.
Abstract
(
612
)
PDF
(664KB) (
683
)
Related Articles
|
Metrics
This paper reviews the development of a teaching laboratory on electron optics. The experimental measurement is carried out on the cathode ray tube of a single-trace oscilloscope. The results from the simulation software Simion and Comsol are very helpful for understanding the electron traces in the lens system.
Random laser based on laser speckle
. 2012, 31(9): 36-36.
Abstract
(
689
)
PDF
(600KB) (
777
)
Related Articles
|
Metrics
A random laser based on the laser speckle structure is proposed. The ferent pumping conditions are investigated systematically. The experiment provides a frontier science and technology for college physics teaching. laser characteristics promising design to under dif-touch the
The contribution of Hu Chien-shan to physics and China＇s education
. 2012, 31(9): 39-39.
Abstract
(
908
)
PDF
(662KB) (
547
)
Related Articles
|
Metrics
Hu Chien-shan is a famous expert on vibration and educator on engineering mechanics. He graduat-ed from physics department of Tsinghua University in 1933, and he went to University of London to make cosmic rays research in 1934. After he received a doctor＇s degree in 1937, he retuned back. He engaged in mechanical engineering research and education of engineering mechanics since 1944, and he made great contribution to the de- velopment of mechanics of Southeast Uniersity. This paper analyzes Hu＇s research on cosmic rays, mechanics, and his education contribution, also analyzes in-depth Hu＇s academic achievements and characteristics in education. This work provieds historical materials for modern physics history through digging Hu＇s life experience and academic work so that learn noble qualites from Hu Chien-shan and memory of him.
The strategies on the end-of-chapter problems of the texts in introductory physics of the United States
. 2012, 31(9): 45-45.
Abstract
(
859
)
PDF
(810KB) (
627
)
Related Articles
|
Metrics
The development of strategies and ideas about the problems in the foreign text books written for in-troductory physics course is reviewed based on three popular American text books. The numbers of problems, the help in solving problems and the advantages in problem design of those books are analyzed. Our work provides a reference to the development of introductory physics text books in China.
Study on the variation of current signal intensity in Franck-Hertz experiment
. 2012, 31(9): 50-50.
Abstract
(
1130
)
PDF
(357KB) (
1152
)
Related Articles
|
Metrics
In the Franck-Hertz experiment, the intensity of iYp-V varies with the temperature of the oven and the voltage of the filament. We find that the intensity of Ip-V signal decreases with the temperature when the tem-perature is below 160 ℃, and increases with the temperature when the temperature is higher than 170 ℃. We then introduce the model of thermal excitation and ionization, which explains such phenomenon when the law of thermal-dynamic equilibrium and the Le Chateler＇s law are applied. After that, we have designed some additional experi- ments, whose results support our postulation.
A design of impact-separated device used to measure the particle concentration
. 2012, 31(9): 53-53.
Abstract
(
740
)
PDF
(370KB) (
412
)
Related Articles
|
Metrics
To achieve measurements of the atmospheric particle concentration, we design an impact-type clas-sified device based on the traditional impact of sampling theory and calibrated exactly. The extinct principle is used to particle samples which had been classified, and enhances the sensitivity of the measurement device by using re-flectors to increase the optical path. Finally, we realize the exact measurement of the grain concentrations of three particle ranges： 0～5μm,5～20μm and 15～40μm in the atmosphere.
A platform for the integrated research of thermal radiation
. 2012, 31(9): 57-57.
Abstract
(
998
)
PDF
(360KB) (
1021
)
Related Articles
|
Metrics
An experimental platform about thermal radiation is designed in this paper. Three basic principles of thermal radiation, including inverse square law of radiation, Stefan-Boltzmann radiation law and Lambert cosine law, are studied quantitatively. The results obtained agree with the theory well. The Kirchhoffs law is also studied qualitatively and it demonstrates the positive relativity between radiating capacity and absorbing capacity.
Just Accepted
