Abstract: The source 4U 1538--52 is one of the well-studied X-ray pulsars. 4 mediumenergy (ME) observations with EXOSATare processed and analyzed, in which 2observations are during the X-ray eclipsing. Combined with the results of the otherobservations, some analyses and explainations are given in this paper....
Abstract: The circular polarization spectra in W33A are observed on emission from the 2Ⅱ3/2 J=3/2, F=1→1 and F=2→2 transition of OH. The hydrogen density in the masing region is infered about 107 cm-3 in both the long thin tube and spherical maser,Apump rate of ～1(OH) cm-3s-1 is required in both geometries fo...
Abstract: The basic equation discribing Spread--Finstability with the existance of acousticgravity waves in the ionospheric Fregion are derived and the numerical simulationsfor certain cases are conducted. The results show that the Spread-Fwill occur inlarge-scale wavelike structures under the conbined action...
Abstract: In this paper, it is assumed that at high latitudes when the air of the auroraloval is heated and then the molecule enriched air rises during the magnetic stormmain phase. This kind of molecule enriched air moves toward middle and low latitudes due to diffusion and interaction with the background ne...
Abstract: The problem of the stability of the forced Rossby wave packets which are nonlinearly interacted resonantly in the middle atmosphere is examined analytically.The expression of the stationary state and the condition of the stability are given.When there is only one forced wave packet, if its lengthsca...
Abstract: The two-dimensional hemispherical dynamo theory is based on the symmetry aboutthe equator, and has certain inherent theoretical shortcomings and limitations in application. In order to extend the dynamo theory to the globe, the assumption of thesymmetry about the equator is removed in present study,...
Abstract: The results of the experiment show that the rats exposed to the suspension(HDT--30°) and the noise environment of 85 dB(A) for 10 days has a significantdecrease in lympocyte blastogenesis and interleukin--2 (IL2), a significant increase inthe content of plasma corticosterone, a tendency to be raised...
Abstract: Based on the principle of measuring the solar diameter by CCD astrolabe, a method of reducing the data of the solar images is proposed and tested, and 8 frames of the solar images exposed on a CCD chip for each of three seeing conditions areyielded. Based on these frames of exposures, adopting digit...
Abstract: Using the phase space reconstructing method, taking the time series data ofionosphere to construct m-dimension phase space and to investigate the relationshipbetween phase points, as well as to extract the fractional dimension and Lyapunovindex, the chaotic features of there time series and the maxi...
Abstract: In this paper, a new method for atmospheric remote sensing from the ground isproposed. The nonlinear deconvolution method and reference effective instrumentfunction are used to increase the spectral resolution. The nonlinear least Squares method is used to retrieve the atmospheric ozone profile. Thi...
Abstract: The influences of the interplanetary magnetic field (IMF) total intensity Bandits sector boundary on the magnetic field of the Earth are investigated by examination of the maximum αα indices during geomagnetic storms. The stroms are classifiedinto three types according to their different linear'corr...
Abstract: The recurrence of geomagnetic activities has provided the. possibility for the prediction. Aquantitative, computable. method--self--adaptive filtering, is introducedto forecast Kindex; its objective is, going with the filtering, to estimate and rectifythe model parameters (on--line) continuously by ...
Abstract: In this paper, a new single-frequency positioning method using five satellitesand algorithm of selecting these satellites are proposed, with which the propagationzenith time delay error can be estimated authomatically. Simulation results show that,when the source error is only due to ionospheric del...
