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1.
Usually,because of the Starkbroadening
for the spectrum lines,the half widths of hydrogen higher Balmer emission lines of the solar flare
increase with the principal quantum number N. Their variation curve,as observed before,has a minimum value near N=8 or 9. However,a curve for the solar flare which
occurred at the limb of solar disk on June 12,1982shows an all-time decline with increasing N. How to
explain this phenomena remains to be discussed. 相似文献
2.
Using the characteristic
values of sunspot number variations during the descent and ascent of solar cycles,a neural network is designed to
make long-term predications of the ascending period and the maximum smoothed monthly mean
sunspot number for the Solar Cycle 23. Moreover,the factor of geomagnetic disturbance is also added as an
input. The trained and tested results from Solar Cycle 12 to 22 have been obtained.
Finally,the
predictions of the ascending period and the maximum smoothed monthly mean sunspot number
are given for Solar Cycle 23. 相似文献
3.
In this paper,5 proton events and corresponding
active regions in the descending phase of Solar Cycle 22(1993～1995) are analysed. The result shows that (1)The proton
flares in 1993～1995
occurred mainly in the longitudy zone of 140～270 degree. (2)4 of 5 events (80%) studied have their
small magnetic fluxes to disappear in their magnetic flux regions with a major polarity,one day before the event. (3)It
is 60% of the event studied to show characteristic of the merging of 2 or greater than 2
magnetic fluxes with similar polarity in their active regions,one day before of the proton
event. The results are possibly useful for the short-term prediction of proton events. 相似文献
4.
In this paper we
introduce the results of our investigations for some new methods of the automatic
observation forecast、data
processing and research,IncludingAutomatic
forecast and capture of solar flare events;A method in drawing light curves of solar flares with high
accuracy;A method for
the automatic observation of solar active regions etc. 相似文献
5.
A Solar and interplanetary observational system composed of
two artificial planets and the earth is suggested for the solar-terrestrial study and
prediction.The two planets should move along the earth's orbit around the sun. The angle
distance between the two planets and between them with the earth is 120°. This system can
be used to improve greatly the short-term,midiu-mterm solar activity predictions and monitor an
earth-toward coronal mass ejection,giving an accurate warning of a solar-terrestrial
disturbance. Observational data obtained by this system would be very useful in a model
work of solar wind and an evolution study of structures in solar atmosphere such as solar
active regions and magnetic fields with various scales. 相似文献
6.
Two parameters,the smoothed sunspot numbers in the eleventh month during
rising phase of the current cycle and the length month of the minimum period (R<14),are selected to predict the
maximum-value of sunspot number of cycle 23 in this paper. The predicted maximum-values of
smoothed sunspot number are 115<Ri<149 and 114<Ri<146 also predicted by
statistical method. The peak-time will be from September,1999 to March,2000,and the end-time will be from August,2006 to April,2008. 相似文献
7.
An introduction to the
instrumonts to be used for solar radio observations in Beijing in Solar Cycle 23 is made
in this paper. They are 10cm solar radio telescope which has been used for a long time,and 1.0～2.0GHz,2.6～3.8GHz and 5.2～7.6GHz spectrometers. The former two spectrometers has
passed a test,showing
high guality,and the
5.2～7.6GHz one will
be in operation from 1999. It is believed that highl gualified data should be obtained in
the next solar cycle. 相似文献
8.
The article analysizes
the current situation and opportunity of the development of radioheliograph in China. It
provides an idea to construct the radioheliograph by three stepsfrom small sized,to middle sized,then tobig sized. Each step is to construct a complete
radioheliograph. The article also analysizes some important technical performance,such as diameter of element
antenna,overall
pointing error and observing frequency. 相似文献
9.
10.
A correlation between
the coronal mass ejection(CME) and the meter wavelength radio bursts is analyzed in this
paper. It is found that type Ⅱ and type Ⅳ bursts
have very good correlation with CME. Noise storms occur several tens minutes before the
onset of the moving type Ⅳ bursts. A sudden stop of noise storms can be used as a sign to foresee the
possibility of a following CME. The three kinds of the moving type Ⅳ
also introduced in this present papersolated source type,the expanding-arc moving Ⅳ type and the advancing front
type. 相似文献
11.
大震以后,跟随着一系列的余震,其震源机制有的和主震一致,有的则大不一样,这表现在P波初动的反向,反应了震源应力场的变化。 余震震源机制变化的原因,既不是岩块的错动过头,也不是液体流出的下陷,而是发生大震的滑动岩块对其前后邻接岩块产生的转换应力场所引起的剪切破裂。 相似文献
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13.
柯坪塔格前缘断裂东段是柯坪推覆构造系前缘的一条活动断裂,野外调查获得了其晚第四纪错断洪积扇、冲沟阶地面的证据,实测了变形地貌面上的断层陡坎,分析了断层的形变量,通过采样测年估算了断层的缩短速率。由7个观测点的断层陡坎剖面测量,计算了观测点处断层的水平缩短速率,结果表明,断裂弧顶部位的五道班、三间房以西及其大山口道班附近,断层错断了Ⅰ级和Ⅱ级洪积扇(阶地)。断层在这些地点最新活动强烈,水平缩短平均速率全新世以来为0·35~0·44mm/a,更新世晚期末以来为0·16~0·30mm/a,而在非弧顶部位的巴楚磷矿、三岔口以北及大山口北断层只错断了更新世晚期Ⅲ级洪积扇,且水平缩短速率较小,断层水平缩短平均速率更新世晚期以来为0·05~0·07mm/a 相似文献
14.
蒙脱石的脱水作用对断层摩擦本构行为的影响 总被引：4，自引：3，他引：4
利用高温双轴摩擦装置，研究了含蒙脱石的断层带在不同温度下摩擦滑动的速度依赖性，以期了解脱水作用对摩擦行为的影响。结果表明，断层带摩擦强度随温度而升高，而速度依赖性较为复杂，以１．４ｕ／ｓ为界，室温和１００℃时，低滑动速率下表现为微弱的速度弱化，高滑动速率下则表现为速度强化；２００℃时均为速度强化；３００℃时高滑动速率下仍为速度强化，但低滑动速率下转变为速度弱化；４００℃以上，均为明显的速度弱化。摩擦行为的变化与脱水过程及相应的断层物质变形方式的变化密切相关 相似文献
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本文是对陕西长安、山西代县和太谷等地工业爆破的资料采用时间项法研究晋中南地壳结构的初步成果。文中首先结合长安爆破观测资料的总结,对时间项方法作一介绍。为使用太谷等缺乏起爆时刻的爆破资料,对时间项方法作了一些改进,使对于那些未有起爆时刻的爆破资料亦能用于确定时间项。使用上述爆破和各台记录的初动到时获得了晋中南地区的界面速度为7.95±0.04公里/秒,求得了41个点的时间项,取莫霍面以上介质的平均速度v0=6.4公里/秒反演求得了各点的莫霍界面深度,并对所得的结果结合晋中南地区的地震活动性及部分地震震源机制结果进行了初步的分析和讨论。 相似文献