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Table of Content
20 October 2007 Volume 26 Issue 10
著者文摘
The unevadable inertial force
. 2007, 26(10): 1-1.
Abstract
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519
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649
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It is emphasized that the inertial force is unevadable and not to be ignored in Newtonian mechanics.
Treatment of the ultra-violet integral divergence of the self-energy for fermions with the method of approximate values of Dirac δ function
. 2007, 26(10): 5-5.
Abstract
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572
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(337KB) (
505
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With the extension rule of the method of approximate values ot Dirac δ functiona set regularization equations for the electron self-energy is developed. The equations are similar to those in reference books such as the Pauli-Villars as well as the dimensional regularization equations. The renormalized self-energy equation for electrons is as well developed which is the same as that in reference books. Finally the counterterm Lagrangian equation is confirmed.
The electric current density fields superposition principle and its applications
. 2007, 26(10): 9-9.
Abstract
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743
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(216KB) (
554
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The electric current density vector field also satisfies superposition principle, some applications thereof are introduced
Numerical-calculation and analysis of basketball-shot probability by Monte-Carlo method
. 2007, 26(10): 12-12.
Abstract
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601
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(289KB) (
385
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Establishing an ideal shot model, Monte-Carlo numerical calculation probability, the optimal shot velocity and angle and cut-off velocity. The parabola is used traces to obtain hollow-shot of shot based on goal angles corresponding to different velocity area are outlined schematically, and the relationship between hollow-shot probability and the shot distance,the height of the shot point are decussed.
A general analysis of extreme range for projectile
. 2007, 26(10): 16-16.
Abstract
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629
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(143KB) (
442
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The work shown in the title is accomplished by using Lagrange multiplicator method for all cases.
Research on some mechanical properties of Jupiter＇s satellites by using Ioglog coordinate
. 2007, 26(10): 18-18.
Abstract
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532
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PDF
(209KB) (
450
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Using loglog coordinate the data relationship of Jupiter＇s satellites are studied, some mechanical properties of the satellites are revealed.
Calculation of the connecting big and small soap bubbles
. 2007, 26(10): 20-20.
Abstract
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652
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PDF
(309KB) (
457
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From the extra pressure of curved liquid surface, state equation of ideal gas and the related equations of spheroid, the connecting big and small soap bubbles is studied and the approximate equation of the radius of the final big bubble is deduced. The demonstration experiment is introduced, three different pictures of the three bubbles are taken, and the radii are measured. The approximate equation is verified and the reason of error is analyzed
The application of mirror symmetry in electromagnetism
. 2007, 26(10): 24-24.
Abstract
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707
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(294KB) (
822
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The role of symmetry analysis in teaching of electromagnetism is clarified systematically, and a logically clear teaching procedure for relevant contents is proposed. The application of mirror symmetry is emphasized.
An explanation and application for several formulas of diffraction theory
. 2007, 26(10): 27-27.
Abstract
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694
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(288KB) (
868
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An explanation in detail for several formulas of Kirchhoff＇ s diffraction theory are introduced, some applications of these formulas are introduced as well.
A C＋＋ programming to confirm spectroscopic terms of equivalent electrons system
. 2007, 26(10): 31-31.
Abstract
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610
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PDF
(223KB) (
719
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The delete principle can confirm the spectroscopic terms of three equivalent electrons system. If the number of equivalent electrons is above three, the workload to reduce the delete principle is really large. After the delete principle is introduced, a C ＋＋ programming which can easily solve the problem is depicted. The result of eight equivalent electrons is used to illustrate the validity of the programming. The programming can confirm spectroscopic terms of equivalent electrons system directly, and it improves the delete principle.
New definitions of true value, random error and systematic error
. 2007, 26(10): 34-34.
Abstract
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771
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(245KB) (
363
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In《JJF1001-1998 General Terms in Metrology and Their Definitions》, new definitions of truevalue,random error and systematic error have been given. The scientificness and rationality of the definitions are discussed. It is suggested to he adopted in college physics experiment teaching and teaching material.
Brief introduction of capacitance parameter digital surveying principle
. 2007, 26(10): 36-36.
Abstract
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646
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PDF
(213KB) (
403
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A circuit on capacitance parameter digital surveying is designed by C - V T transformation. The capacitance parameter digital surveying principles are introduced .
Measuring specific rotation and concentration of the sucrose with laser
. 2007, 26(10): 38-38.
Abstract
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852
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PDF
(244KB) (
1214
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The specific rotation and concentration of the sucrose are measured with laser, It can collect the data and out put the curve real - timely by computer,it has the advantages of easy clarity and high accuracy.
Designing quasi-distributed based on OTDR threshold temperature actuator and SMA principle
. 2007, 26(10): 40-40.
Abstract
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610
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PDF
(569KB) (
378
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The design of threshold temperature actuator is the key technology for the quasi-distributed fiber optical temperature annunciator system to locate the position where the temperature alarm is taking place. Therefor the principle of designing the actuator based on OTDR （optical time domain reflectometer） and SMA （shape memory alloy） are analyzed, and the actuator＇s physical model are put forward too. By experiment research such SMA spring that meet the actuator＇ technical specififcations had been chosen from the samples. And then the actuator＇s mechanic design are implemented by making use of that SMA spring. The system＇s running show that the threshold temperature actuator can operate efficiently and that the system can realize quasi-distributed temperature alarm, and moreover the system has such excellent performance parameter as spatial resolution approaching 1.5 meter and response time under 16 second.
第一段
The founder of modern magnetism ——Van Vleck
. 2007, 26(10): 47-47.
Abstract
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751
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(422KB) (
589
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John Hasrouck Van Vleck, the famous American theoretical physicist, is the laureate of Nobel prize for physics in 1977. His life and his contributions in scientific investigation and achievement in the training of students are presented.
著者文摘
The researching study based on the platform of digital technology
. 2007, 26(10): 52-52.
Abstract
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472
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PDF
(409KB) (
332
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This paper introduced, in the teaching of university physics, how to guide students to carry out researching study independently by making use of digital platform. First, we spread and transfer the knowledge. Then, under the guide of teacher, the students research, explore and finally act on their own research and innovation independently. It has proved that the teaching method created in our practice is effective extremely to train student＇s scientific quality and the ability.
The mass evolvement of system with negative heat capacity in background radiation and the numerical simulation using Runge- Kutta method
. 2007, 26(10): 57-57.
Abstract
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524
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(246KB) (
321
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A differential equation of the mass of system with negative heat capacity in background radiation, for example Schwarzschild black hole,is obtained ignoring an underlying unitary theory. A necessary study and discussion on the equation, mentioned in《Mechanics of new concept physics》, and《Heat of new concept physics》 are made. At the end a numerical simulation of the mass evolvement is carried out using Runge-Kutta method. It helps students understand the system with negative heat capacity more easily.
The property of surface waves of water studied by diffraction of light
. 2007, 26(10): 60-60.
Abstract
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764
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PDF
(299KB) (
737
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The surface wave of water is regarded as a grating of sine phase type and the laser diffraction pattern thereby is related to the wavelength thereof. It turns out that the composition of the surface wave is mainly the capillary wave, at last the dispersion relation of this wave is verified.
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