Loading...
NianQi Search
Quick Search
Advanced Search
Toggle navigation
April 12, 2025
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 January 2009 Volume 28 Issue 1
著者文摘
The static equilibrium and the vibrations of the spring-particle system under the action of the gravitational force
. 2009, 28(1): 1-1.
Abstract
(
1119
)
PDF
(772KB) (
646
)
Related Articles
|
Metrics
The static equilibrium configuration of the spring-particle system under the action of the gravitational force depends on the effective mass of the system;the eigenvihration frequncies ωn of the system depends on the mass ratio between the spring and the paticle. The mean values of ωn depends on the initial conditions of the system,the different initial conditions lead to different mean values of the ωn.For example, if u（y,0）=u0f（y）=u0y,thenω^2=k/（m2＋1/3m1）. An accurate approximate-calculation formula for θ1=ω1/ω0 is derived.
Effective permittivity of dielectric sphere with an eccentric spherical inclusion
. 2009, 28(1): 11-11.
Abstract
(
844
)
PDF
(315KB) (
452
)
Related Articles
|
Metrics
The analytical expressions of effective dipole moment and quadrupole moment for a dielectric sphere with an eccentric spherical inclusion under the influence of a static uniform external field are obtained by using the variable separation. The approximate effective permittivity （AEP） of dielectric sphere with an eccentric spherical inclusion is introduced. Because the AEP is related not only to the dielectric inside the sphere but also to the dielectric outside the sphere, it is unlike the equivalent permittivity of concentric layered dielectric sphere. The variation of AEP with the eccentricity and permittivity of dielectric outside the sphere is shown by numerical results.
To explain the fundamental optical phenomena of anisotropic crystals using electromagnetic theory
. 2009, 28(1): 15-15.
Abstract
(
1034
)
PDF
(328KB) (
1092
)
Related Articles
|
Metrics
Double refraction and linear polarization are the fundamental optical phenomena of anisotropic crystals, they are explained by using the electromagnetic theory.
Where is the center of mass of a spring
. 2009, 28(1): 18-18.
Abstract
(
1182
)
PDF
(182KB) (
1359
)
Related Articles
|
Metrics
The mass distribution and position of the center of mass of a spring are discussed.
An alternatively derivation of time formula of a planet in an elliptical orbit around the sun
. 2009, 28(1): 20-20.
Abstract
(
1135
)
PDF
(151KB) (
928
)
Related Articles
|
Metrics
By using the energy equation, we give an alternatively derivation of time formula of a planet in an elliptical orbit around the sun.
Exchange operators in the coberent state representation for a Fermi system
. 2009, 28(1): 22-22.
Abstract
(
1198
)
PDF
(316KB) (
648
)
Related Articles
|
Metrics
Using the Fermi coherent state and the integration technique of normal- ordered to study exchange operators of the two states in a Fermi system, we obtain the operators in the coherent state representation and the number representation. Furthermore, we generalize the results to the case of several states.
A demonstration of completeness of coordinate eigenvectors
. 2009, 28(1): 25-25.
Abstract
(
1277
)
PDF
(253KB) (
829
)
Related Articles
|
Metrics
A vector ｜x〉 expressed by the real number x, the creation operator and the ground state of particle number operator is obtained in terms of the eigenvectors and the completeness relation of particle number operator. It is proved that the vector ｜x〉 is the eigenvector of coordinate operator; the integral over coordinate projective operators is equal to the identity operator; and the eigenvectors of coordinate operator are orthogonal. Hence all eigenvectors { ｜x〉 } form a complete and orthogonal set of basic vectors in an infinite-dimensional vector space.
Discussion on dilation transformation and symmetry of Maxwell equations
. 2009, 28(1): 28-28.
Abstract
(
1003
)
PDF
(346KB) (
792
)
Related Articles
|
Metrics
It is shown that the Maxwell equations are not invariant under the dilation transformations.
Measurement of expansion coefficient of liquid by using force sensor
. 2009, 28(1): 31-31.
Abstract
(
805
)
PDF
(258KB) (
967
)
Related Articles
|
Metrics
Using the force sensor to measure the expansion coefficient of liquid, we improve the traditional experimental methods and instruments. Thus non-electric measurement is realized and the accuracy and stability of the experiment is increased.
Analysis of several methods for the results in scientific experiments
. 2009, 28(1): 34-34.
Abstract
(
796
)
PDF
(474KB) (
412
)
Related Articles
|
Metrics
Several typical methods of scientific research about granular materials are analyzed and the advantages of them are introduced. Their innovative thought and the methods of dealing with the complex problems should be worthy of reference.
Estimation of the position of diffraction object in the interference and diffraction experiments
. 2009, 28(1): 39-39.
Abstract
(
835
)
PDF
(254KB) (
1286
)
Related Articles
|
Metrics
The formulae used to estimate the position of the diffraction object in the interference and diffraction experiments are derived through two approaches ： analyzing the space coherence property of the source and considering the edge diffraction property of the practical source. The double slits interference experiment and the circle opaque diffraction experiment are analyzed as two examples.
Distinguish tri-port sinusoidal oscillator phasic balance by reactance line
. 2009, 28(1): 41-41.
Abstract
(
916
)
PDF
(326KB) (
683
)
Related Articles
|
Metrics
A concept of reactance line for components including multiple-unit one is proposed if the condition of amplitude balance is satisfied during one uses the tri-port sinusoidal oscillator. This can distinguish intuitively, accurately and rapidly the phasic balance.
Salzburg conferences --the beginning Einstein entered the physicist core layer
. 2009, 28(1): 44-44.
Abstract
(
1674
)
PDF
(416KB) (
1081
)
Related Articles
|
Metrics
In 1905, Einstein submitted three important papers to ＂Annalen der physik＂ of Germany. Soon two of the papers were evaluated by the German physics community with Plank as the leader; in 1909 Einstein was invited to attend Salzburg conferences for the first time, In the report ＂On the Development of Our Views Concerning the Nature and Composition of Radiation＂ Einstein further expounded the two hot issues on the principle of relativity and optical quantum hypothesis. This speak caused a great stir, and enabled him to enter world-class physicists core layer once and for all.
Discussion on rotating trap of two-dimensional harmonic oscillator
. 2009, 28(1): 48-48.
Abstract
(
958
)
PDF
(164KB) (
564
)
Related Articles
|
Metrics
To study the rotating trap which is related with BEC, two-dimensional harmonic oscillator is analyzed and Hamiltonian is provided. Wave function and energy eigenvalue are given. A coincidence is found that the rotating trap of two-dimensional harmonic oscillator has the similar form as the potential of charged particle in magnetic field.
Using Runge-Lenz vector to deduce the Bohr formula
. 2009, 28(1): 50-50.
Abstract
(
1082
)
PDF
(160KB) (
388
)
Related Articles
|
Metrics
By using the Hamiltonian, conversation of angular momentum and Ruge - Lenz vector, the Bohr formula is deduced in the frame of classical mechanics. This can avoid complex integral and makes the deduction to be simply.
Geometrical deduction on the Rutherford scattering formula
. 2009, 28(1): 52-52.
Abstract
(
1121
)
PDF
(158KB) (
923
)
Related Articles
|
Metrics
Using of some basic geometrical knowledge, together with the physical meaning of the parameter, the Rutherford scattering formula is easily deduced
Just Accepted
