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Table of Content

    24 August 1982, Volume 2 Issue 3 Previous Issue    Next Issue
    论文
    AN INVESTIGATION OF STEEL PRESSURE VESSELS WITH VERY HIGH STRENGTH
    Qi Rui-chang;Cheng Liang-shan;Zo Lian-ming
    1982, 2 (3):  165-172.  doi: 10.11728/cjss1982.03.165
    Abstract ( 1314 )   PDF (843KB) ( 983 )   Save
    The influences of basic metal chemical composition,heat treatment conditions and welding parameters on the pressure vessel brittle fracture have been investigated.The fracture control analysis of vessel was performed with modern fracture mechanics.Many experimental tests confirmed that the pressure vessels fabricated according to our technical norms are safe and reliable in the service.
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    A NEW TYPE OF MULTILAYER THERMAL INSULATION SYSTEM WITH HIGH EFFECTIVENESS (GS-80 MULTILAYER INSULATION SYSTEM)
    Su Zheng-gin;Lu Yan-jing
    1982, 2 (3):  173-179.  doi: 10.11728/cjss1982.03.173
    Abstract ( 1460 )   PDF (596KB) ( 1080 )   Save
    Anew type of multilayer thermal insulation system with high effectiveness (GS-80 multilayer thermal insulation system) was developed.The base material of the insulator is Mylar film.One surface of it is coated with high reflectance aluminium,used as reflective shield,the other surface is painted with stome powdered inorganic material,used as spacer.The powdered spacer can highly increase the thermal performance of the multilayer insulation system.This insulation material has many other advantages such as high strength,small weight (148/m2 for each layer) and thickness (20-40μ for each layer),shock resistance,softness and easy to operate.The thermal perfomance of multilayer insulation systems made from this insulation material were measured and the results were analysed.
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    THE ABLATION MODEL OF THE SOIDUM LAYER IN THE MIDDLE ATMOSPHERE
    Zhuang Hong-chun;D. M. Hunten;Y. L. Yung
    1982, 2 (3):  180-193.  doi: 10.11728/cjss1982.03.180
    Abstract ( 1543 )   PDF (1099KB) ( 884 )   Save
    Ameteor ablation model of the sodium layer is developed,in which ablation is the source and depositon on dust particles is the sink.All the photochemical reactions which appeared in previous work are considered and 40 reactions are picked out,ot be included in the model.Kealistic eddy diffusion and downward electrodynamic transport are also incorporated in the model.The importance of the photochemical reactions and the various other aspects of the model are evaluated and compared with each other.Results show that the relative concentrations of various species of sodium and its compounds are mainly determined by a set of photochemical reactions.The main species above 105 km is Na+,below 80 km is NaOHand between 80 km and 105 km is Na.The total concentration is mainly determined by the profiles of ablation and dust concentration.The atmospheric background and the photo-ionization rate constants can produce seasonal and diurnal variations of the sodium layer.Comparison of the theoretical model with observation shows generally a good agreement.
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    THE PROCESS OF THE FORMATION AND EVOLUTION OF THE JILIN METEORITE
    Ouyang Zi-yuan
    1982, 2 (3):  194-204.  doi: 10.11728/cjss1982.03.194
    Abstract ( 1712 )   PDF (973KB) ( 965 )   Save
    On the basis of the data from a multi disciplinary integrated study of the Jilin meteorite,we have made a discussion on the formation and evolution of it involving the following aspects: (1) the fractionation-eondensation of the solar nebula,based on the condensation conglomeration age and the mineral association of the Jilin meteorite; (2) the thermoametamorphic history of the Jilin parent body,based on the data on the loss of rare gases,the chemical composition of the whole rock,the self-purification of BEEand the compositional stability of olivine and orthopyroxene; (3) the cowling process of the Jilin parent body,in reference to the Ni content and range of taenite as well as to the retention of argon and fission tracks in the minerals: (4) the breakup of the Jilin parent body and its cosmic ray irradiation history.Based on the measurements of the cosmogenic nuclides as He3,Ne20,21,22,Ar38,Na22,Al26,Mn54,Mn53,Co60 etc,a tw,o-stage model of irradiation history of the Jilin meteorite has been proposed.From the data on the Jilin parent body of the first stage (the age=10-11 my and r=10m) and that of the second stage (the age=0.3-0.5 my and r=80-90cm),we have defined the relative positions of the samples in the parent body,and their burial depths as well as the post-atmospheric loss on ignition,respectively; (5) the falling process of the Jilin meteorite,the orbits of the Jilin meteor in the solar system and in the atmosphere,and its falling process have been discussed.
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    STUDIES OF THE CONTENT AND THE DISTRIBUTION OF URANIUM OF LUNAR MARE BASALTIC FRAGMENTS TAKEN BY APOLLO 17
    Hu Rui-ying;Liu Shun-sheng;Sun Sheng-fen;Guo Shi-lun;Meng Wu;Deng Xin-lu
    1982, 2 (3):  205-208.  doi: 10.11728/cjss1982.03.205
    Abstract ( 1408 )   PDF (366KB) ( 936 )   Save
    The U-content and the U-distribution in 70017-291 lunar mare basalts was studied by means of fission tracks.The pure moscovite sheets and "Lexan" polycarbonate foils were used as track detectors.The samples were irradiated in the thermal column of the heavy-water reactor,Institute of Atomic Energy,Academia Sinica.After irradiation,the moscovite sheets and Lexan foils were removed,then etched in 40% HFat 25℃ for 20 minutes and in 6 N NaOHat 70℃ for 10 minutes respectively.The U-eoncentra-tions in basaltic fragments range from 3.0 ppb to 43.4 ppb,and in pyroxene from 0.95 ppb to 15 ppb.From the data of pyroxene,a tendency of decreasing U-concentra-tion with increasing crystal size is recognizable.The U-microdistribution pattern of rock fragments shows that uranium is mainly concentrated in intergranul,ar material.The higher the silicon content,the higher the U-content.These are obviously due to the fact that the residual liquid would be isolated prefer ably in the final stage of crystallization,and it is highly enriched in uranium.
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    STUDY ON THE CHEMICAL COMPOSITION OF 9 CHONDRITES IN CHINA
    Chen Wen-hua;Du Eui-zhi;Fang Xiu-ying;Peng Jin-lian;Xie Chang-sheng
    1982, 2 (3):  209-214.  doi: 10.11728/cjss1982.03.209
    Abstract ( 1579 )   PDF (525KB) ( 921 )   Save
    In this paper,not only has an analytical procedure to determine various chemical elements in chondrites been developed,but also their contents in 9 chondrites have been determined.In addition,chemical parameters were calculated.According to their chemical composition and parameters,we can come to the following conclusions:1.The 9 chondrites belong to 3 chemical groups,H (Lunan,Tuochi,Xinyang),L (Jartai,Xiwu,Rugao,Lishui,Guangrao) and LLgroup (Dongtai).2.Fe0 and the ratio of FeO/Fe decrease from Hto LL,but FeOand FeSincrease,It means that the degree of oxidation is growing higher.3.The contents of SiO2 also increase from H to LL whereas TFe,Ni and Co decrease.The variation rule can be used as the reference criteria to distingush the chemical groups of chondrites.4.The contents of SiO2,MgO,FeO,Fe0 FeS and TFe in chondrites from Eugao determined earlier have been corrected.
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    THE STRUCTURE OF A EQUILIBRIUM MAGNETOTAIL
    Ding Da-qing;Fu Zhu-feng
    1982, 2 (3):  215-223.  doi: 10.11728/cjss1982.03.215
    Abstract ( 1387 )   PDF (659KB) ( 654 )   Save
    Considering the presence of the plasma sheet and the plasma mantle,we obtain a two-dimensional self-consistent equilibrium model of the magnetoteil based on the Vlasov equation.The model is characterized by an equilibrium state.The pressure is assumed to be isotropic.The gradients parallel to the tail are assumed to be much smaller than the perpendicular one.Our model is of two-dimensions,the gradients in y-direction are neglected.Our model includes a number of dominant structural elements: (1) the plasma sheet,a region of hot plasma; (2) the closed field lines inside the plasma sheet; (3) the tail lobe,regions of dilute plasma between plasma sheet and magnetopause; (4) the plasma mantle,regions of magnetosheath-like plasma inside and adjacent to the magnetopause; (5) magnetopause,the boundary of the magnetosphere; (6) the flaring magnetotail.We have discussed the influence of the presence of the plasma mantle on the equilibrium model of the magnetotail.The model tells that the presence of the plasma mantle makes the magnetotail more "tail" like.So it overcomes partly,at least,the difficulty in Birn's model.
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    A METHOD FOR DETERMINING THE AGE OF COSMIC RAYS IN THE GALAXY
    Huang Yong-nian
    1982, 2 (3):  224-230.  doi: 10.11728/cjss1982.03.224
    Abstract ( 1422 )   PDF (562KB) ( 949 )   Save
    This paper presents a way to determine the age of cosmic rays in the galaxy by using the data on the ratio of the abundance of manganese to iron from,the Danish-French isotope instrument on board HEAO-3.The leaky-box model and the exponential path-length distribution have been adopted in this paper.
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    THE EXPERIMENTAL MEASUREMENT OF TOTAL ABSORPTANCE BY THE OZONE 9.6 MICRON BAND
    Zhu Guang-ze
    1982, 2 (3):  231-240.  doi: 10.11728/cjss1982.03.231
    Abstract ( 1274 )   PDF (801KB) ( 546 )   Save
    The total absorptance of ozone (O3)9.6 micron band has been measured at the room temperature.The amount of ozone is from 0.0188 to 0.5 atm-cm and the range of pressure is from 17 to 760 mmHg.In the experiment the cross-shaped absorption cell containing ozone is used; the ultra-violet absorption is recorded through one arm of the absorption cell to determine the amount of ozone and the infrared spectrum is recorded through the other arm to determine the total absorptance of ozone in the cell.The experimental data have been analysed and processed according to the theory of the absorption spectrum model.The result of the experiment shows that the experimental data are consistent with the statistical model.Finally,the band parameter applied to the statistical modle is given.
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    THE DYNAMICAL ANALYSIS OF ORBITAL CORRECTION FOR EARTH'S OBSERVATORY SATELLITE
    Gao Huai-bao
    1982, 2 (3):  241-250.  doi: 10.11728/cjss1982.03.241
    Abstract ( 1319 )   PDF (671KB) ( 858 )   Save
    In this paper,the dynamical process of orbital adjustment by small thrust,for Earth's observatory satellite is discussed.All procedures of orbital transfer includes the co-planar transfer which eliminates errors of the altitude and the symmetrical non-coplanar transfer which eliminates the error of the inclination.At first,control equations are given.Then,the change of orbital parameters with the thrust's operation is calculated by means of a numerical example.Finally,the effects of the thrust's directional deviation on the orbital transfer are studied.
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    LOCATING OF A RADIATING SOURCE IN SPACE BY TIME DELAY MEASUREMENT AND IT'S ERROR ESTIMATION
    Ling Fu-gen
    1982, 2 (3):  251-259.  doi: 10.11728/cjss1982.03.251
    Abstract ( 1222 )   PDF (627KB) ( 925 )   Save
    In this paper a ground based array named crossbiline array for determination of the location of a radiating source in space is discribed.First,the location of radiating source can be represented by some different coordinates,either by Bq.(2) in rectangular coordinate x,y,z,or by Bq.(3) in range R,azimuth A,and elevation E,or by Eq.(1) in range R,relatively bearingis θ1 and θ2.Second,we derived the formulas (5)-(8) to determine the R,θ1 and θ2 based on time delay measurement between sensors of the array.The signal propagating velocity v can be eliminated by Eq.(9),so that the velocity uncertainty does not affect the estimates of R,θ1 and θ2.Finally' this paper gives a method to calculate the errors (这里有图片19820311-251-1.GIF) and bθ2 in estimating (这里有图片19820311-251-2.GIF),(这里有图片19820311-251-3.GIF)1 and (这里有图片19820311-251-3.GIF)2 (Eq.(16) and (17)).Eq.(18) is a simple form for the case of equal distance array,L1=L2.It was pointed out that the errors of range estimates are proportional to the range itself,and the range is usually overestimated rather than underestimated.
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