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Table of Content

    24 August 1989, Volume 9 Issue 3 Previous Issue    Next Issue
    A0535+26 AND THE STRUCTURE OF GAS OUTFLOW FROM Be STAR
    Mi Guo-zhu;Shen Jin-ying
    1989, 9 (3):  161-167.  doi: 10.11728/cjss1989.03.161
    Abstract ( 1402 )   PDF (481KB) ( 537 )   Save
    In the transient hard X-ray binaries, the structure of gas outflow from Be stars is not clear. We establish a hybrid model with a disc plus gradually accelerated wind. The velocity structure is presented and the X-ray light curves are calculated. Alot of observational phenomena of A0535+26 can be explained by this model.
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    STOCHASTIC ACCELARATION OF IONS IN THE PLASMA SHEET BY THE BROADBAND ELECTROSTATIC NOISE
    Mu Jian-lin;Pu Zu-yin;Cai Shi-dong
    1989, 9 (3):  168-174.  doi: 10.11728/cjss1989.03.168
    Abstract ( 1308 )   PDF (477KB) ( 565 )   Save
    In this paper the stochastic accelaration of ions in the plasma sheet boundary layer of the Earth's magnetotail by the broadband electrostatic noise is discussed. The calculations show that, due to the interaction with the noise, the trajectories of some ions in the phase space are stochastic. The area of the random motion in phase space is raleted to the amplitude, frequency and wave vector of the noise; through the stochastic accelaration, a part of the ions can be accelarated to the order of about 100 keV. These results may be used to explain the observations that some ions with very high energy exist in the plasma theet of the Earth magnetotail.
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    RELAXATION PROCESS OF IONIZATION IN FLARING REGION
    Chen Gui-fu;Huang Yong-nian
    1989, 9 (3):  175-179.  doi: 10.11728/cjss1989.03.175
    Abstract ( 1406 )   PDF (359KB) ( 1879 )   Save
    This paper presents a model describing the changes of ion charges and their relaxation process in solar flare phenomena based on the fact of low temperature magnetic loops emerging before solar flare bursts and prompt heation of plasma in impulsive phase of solar flares. Numerical calculations of charge state distributions and mean ionic charges of element C, N, Oare obtained and the results are coincident with the observations.
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    THE INFLUENCE OF HIGH ENERGY ELECTRONS AND CONTAMINATION ON LANGMUIR PROBE DIAGNO-STICS OF GAS DISCHARGED
    Zhou Huai-bei;Wang Wen-qing;Sun Chuan-li
    1989, 9 (3):  180-186.  doi: 10.11728/cjss1989.03.180
    Abstract ( 1347 )   PDF (410KB) ( 1361 )   Save
    In the typical method of Langmuir Probe diagnostics of laboratory plasma, only iorr current correction is made. In fact, some electrons escaped from the filament, are accelerated through DCelectric field, they make electron temperature observed by probe "greater" than its real value. The error of electron temperature distorted by high energy electrons is as large as 80%-200%. At the same time, the measurement error of saturated electron current caused by high energy electrons is 70%-150%, that is also the measurement error of electron density. The error caused by the probe surface contamination is also discussed.
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    THE EXPERIMENTAL RESEARCH OF BGK MODE'S ION ACOUSTIC WAVE
    Wang Wen-qing
    1989, 9 (3):  187-194.  doi: 10.11728/cjss1989.03.187
    Abstract ( 1352 )   PDF (508KB) ( 661 )   Save
    The existence of BGKmode's Ion Acoustic Wave (IAW) is verified experimentally. The growing ion acoustic wave instability caused by the slow electron drift is studied by both CWand pulse modulated wave methods.The optimum conditions for exciting BGKmode's IAWare obtained experimentally in an unmagnetized plasma for the first time. The results are quite agreeable with the theoretical preduction.
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    STUDIES ON PHYSIOLOGICAL CRITICAL INDEX OF RHESUS MonKEYS AURING EXPOSING TO TRANSVERSE ACCELERATION FORCE
    Zhang Shu-fu;Wu Zhen-rong;Song Ru-gai;Bao Zheng
    1989, 9 (3):  195-205.  doi: 10.11728/cjss1989.03.195
    Abstract ( 1349 )   PDF (1620KB) ( 577 )   Save
    Ten rhesus monkeys (Macaco, mulatta) are exposed to 16Ghypergravity force, the respiratory rate, EEGare continuously recorded. Under the action of 16G, the respiratory rate of all the monkeys increases first, then slowed down, and at the end of the centrifugation, the respiration almost ceased. The heart rate showed an initial increase (70% monkeys), then a gradual decrease, sometimes occurs arrhythmia, heart block etc. The brain waves appeared mainly to be the "delta" waves with high amplitude and low frequency. Then the wave amplitude fell down gradually and accompanied by the appearance of 4-6 c/sec. "theta" waves with small amplitude. Not until the EEGdisappeared did stop the centrifugation.
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    THE MAGNETIC FIELD TWIST AND THE FLARE OCCURRENCE RATE IN A SOLAR ACTIVE REGION
    Lin Yuan-zhang;Chen Jian
    1989, 9 (3):  206-215.  doi: 10.11728/cjss1989.03.206
    Abstract ( 1346 )   PDF (611KB) ( 624 )   Save
    In this paper the well-known solar active region McMath 12094 of Oct. 1972 is taken-as an example to investigate the relation between the magnetic field twist and the flare occurrence rate in a solar active region. Adopting a model of constant a force-free magnetic field for the region and taking the observed photospheric longitudinal magnetic field as the boundary condition, the values of force-free factor a, which represent the average level of magnetic twist in the region, are calculated for the four days when the region was near the center of solar disk (28-31 Oct.). The nusing these a values, the three dimensional configurations of the lines of magnetic force are extrapolated. Based on these data, the evolutionary characteristics of the magnetic field as well as the relation between the magnetic field twist and the flare occurrence rate are discussed. Finally, the electric current in the preceding sunspot Aof the region the electric current density and the stored magnetic energy caused by the on of the sunspot Aare estimated under the approximative model of an unipolar magnetic field. The main conclusions obtained are as follows.1) The magnetic field twist in McMath 12094 was rather strong since 28 Oct. and reached a maximum on30 Oct.. After 31 Oct. it became weaker. The principle source of the magnetic twist was the counterclockwise rotation of the preceding sunspot A, which was caused by MHDin the photosphere.(2) The values of the force-free factor a which represent the average level of the magnetic twist varied in parallel with the flare occurrence rate, indicating that the latter is proportional to the magnetic field twist in the region.(3) The electric currents through the umbra of the large preceding sunspot Aare 4.3-6.6×1012A. The stored free energies caused by the magnetic twist are 0.44-1.11×1032erg. The densities of electric current in the region rise up to 0.96-1.47×10-2 A/m2. Probably these high densities are responsible for making the active region with high occurrence rate of flares.
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    FREQUENCY DISPERSION OF THE HF BACKSCATTER CHANNAI
    Zhang Xiu-ju
    1989, 9 (3):  216-220.  doi: 10.11728/cjss1989.03.216
    Abstract ( 1328 )   PDF (331KB) ( 861 )   Save
    In this paper an experiment to measure the frequency changes in an ionospheric channal by HFbackscatter techniques are described. The method of the digital spectra analysis are used, the variations of the Doppler frequency shifts and frequency spread versus time of the day are discussed. By comparing with the land echo spectra and response echo spectra, the results show that in HFbackscatter the contribution of the land to Doppler frequency shifts does not exist, but it affects the spectra width.
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    OBSERVATIONS AND PRELIMINARY ANALYSIS OF THE DEVELOPMENT OF ARTEMIA EGGS RECOVERED FROM SATELLITE “8799”
    Zhou Qi-ling;He Jian;Xing Guo-ren;Zheng De-cun;Su Rui-zhen;Chen Qu-e
    1989, 9 (3):  221-225.  doi: 10.11728/cjss1989.03.221
    Abstract ( 1399 )   PDF (352KB) ( 886 )   Save
    Eggs of Chinese native brine shrimp, Arteinia salina, were carried by satellite "8799". The total dose of ionizing radiations received by the eggs during 8-day spaceflight was about 169 mrad. The flown eggs started to be incubated in artificial sea water and observed, along with ones of the lab control and the launching-site control groups, on 21st-29th, 96th and 155th days after accomplishment of the flight. The main results are: (1) it was observed again that significant delay of emergence and hatching occurred in flown eggs and the extent of this delay appeared to have reduced gradually during prolongation of the egg storage at 42C; (2) the hatching rate of flown eggs and the survival curve, within 21 days, of larvae hatched from flown eggs were very similar to those seen in the earth control groups; (3) in the on-earth experiments of simulating super-gravity (up to 160 g), we didn't find any obvious effect on development. The necessity of two control groups (one kept in lab and the other sent to launching-site) parallel with the spaceflight samples was emphasized, and the importance of the effect of micro-gravity in the spaceflight was presumed.
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    THE TEMPERATURE PROBLEM OF SOLAR PANEL OF SPACECRAFT IN ORBIT
    Tang Ling-li;Zhu Lian-fang
    1989, 9 (3):  226-232.  doi: 10.11728/cjss1989.03.226
    Abstract ( 1474 )   PDF (354KB) ( 1112 )   Save
    The basic equations of energy equilibrium of solar panel in several typical heat environments and the equations for the space heat radiation angle coefficients are obtained py the principle of energy equilibrium. The angle coefficients and the maximum temperature fluctuation are obtained for a solar panel at different orbits by the method of numerical integration. After considering this temperature effect the intrinsic frequency characteristics of the solar panel is analysed and calculated by the finite element method. The result shows that the effect of dynamic characteristics of selsr panel of the spacecraft in orbits between shaded and sun lit parts can not be ignored.
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    A REPLICATION FOR THE “SEVERAL PROBLEMS ON THE DESIGNING OF THE MILLISECOND ORDER RADIO RECEIVER IN EARLY1980'S IN BEIJING OBSERVATORY”
    Jin Shen-zheng;Fu Qi-jun;Zhao Ren-yang
    1989, 9 (3):  233-240.  doi: 10.11728/cjss1989.03.233
    Abstract ( 1462 )   PDF (618KB) ( 865 )   Save
    This paper is a replication for the "Several problems on the designing of the millisecond order radio receiver in early 1980's in Beijing" by Zhen et al. In this paper, some problems such as the calibration, the zero-point, the electronical attenuotion, the A/Dconverler, the formation of the outut data and others in our primary radio receiver with millisecond time resolution are discussed. We belive that the design of the system was correct and applicable.
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