共查询到20条相似文献，搜索用时 41 毫秒
1.
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
2.
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
3.
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
4.
5.
《地球物理学进展》1999,14(1):32
In the paper,the effects of short-term
prediction techniques of solar activity of the World Warning Agency (W) and Beijing
Astronomical Observatory in 1970s(B7) and 1990s(B9) were analyzed statistically by the
standard of the effects of the persistance prediction technique(CH) in the same periods of
time. A Q-index evaluating effects of prediction has been put forward;the index indicates the synthesis of positive effects of
correct forecasts and negative effects of false forecasts. Against the persistence
prediction (CH),the
effects of WWA prediction (W),BAO prediction using 1970s' technique (B7) and 1990s' technique (B9) during the
same periods of time as (CH) have been evaluated by the Q-index. Based on the above,we have advanced a concrete
scientific way to improve the short-term prediction technique. Especially,we have raised that in order to
improve prediction technique,the results of persistence prediction should become the basic component of
short-term prediction of solar activity;namely,present prediction of forecasting the levels of solar
activity should be transformed to forecast the coming change of solar activity levels with
the aim of using the effects of persistence prediction fully. 相似文献
6.
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
7.
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
8.
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
9.
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
10.
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
11.
12.
本文根据一个由较新的月震、月球形状、月球重力及月球天平动资料所建立的真实月球内部结构模型,解算了在地球和太阳的引潮力作用下月球表面的弹性潮汐形变。得到了表征月球弹性潮汐形变的特征数--月球勒夫数。这个结果与国外一些学者采用假想或简单月球模型所得结果有较大不同。同时,本文还根据近年来出现的新的地球模型,再次求解了地球的静态勒夫数。结果表明,采用不同的地球模型对解算地球的静态弹性潮汐形变的结果影响很小。 相似文献
13.
本文简介从新疆叶城至西藏狮泉河的大地电磁测深剖面．它北起塔里木盆地，横跨昆仑山脉和喀喇昆仑山脉地区到冈底斯西段，全长８００余公里．探测结果表明，不同测点的地壳内部有的有两个低阻层，有的则只有一个低阻层，壳内第１低阻层的埋藏深度约１０－３５ｋｍ，第２低阻层的埋藏深度约３０－６５ｋｍ。在南昆仑缝合带以南，壳内低阻层的埋藏深度有从南向北不断加深的趋势；而在其以北的壳内低阻层的埋藏深度则与此相反．上地幔第１低阻层的埋藏深度约在１００－１５０ｋｍ之间，第２低阻层的埋藏深度约在３５０－５５０ｋｍ之间． 相似文献
14.
本文阐述了浙江东部沿海海蚀地貌的分布特征,认为高位古海蚀地貌是浙江东部一种普遍存在的现象,这些海蚀地貌确系古海面遗迹,但它们今日之分布高度乃是长时期构造抬升作用的结果。同期海蚀地貌的分布高度不同,除在形成时受到各种因素制约外,断块间的差异升降运动也是其影响因素之一。 相似文献
15.
本文对大地电磁阻抗相位资料的性质及其意义作了总结和评述。文中述及的阻抗相位资料正则化反演方法,是在文献〔1〕的基础上进行了改进,笔者就此给出了实际算例和概要分析 相似文献
16.
文中介绍了一个新的引潮位展开,含有潮波3070项及一些新的信息;潮波振幅给至小数点后第6位.为了与精密引潮位比较,专门建立了一套标准数据,其精度为±0.001μGal.按照这一标准数据,我们评价了精密引潮位展开的精度,并给出了其余差及功率谱分析的结果.结果表明,对于潮汐重力,精密引潮位展开的精度,可达±0.005μGal. 相似文献
17.
随着结构震害统计资料的不断增加,许多结构在地震作用下的宏观破坏现象用现有的反应谱理论不能获得合理的解释。在地震中,结构-地基耦合振动十分明显。就此问题出发,利用集总参数法建立了结构-地基耦合振动模型,分析推导了该模型下的地震反应谱公式。通过实例计算得出了耦合体系在不同频率地震波作用下的反应谱曲线,得出了一些有意义的结论。研究结果表明,对于具有浅埋刚性基础的结构体系在考虑耦合后的地震响应值与现有反应谱理论计算值有明显差异,地震作用在较大结构周期跨度上得到折减,同时,耦合体系对特定频率的地震波有吸收作用,现有反应谱理论没有体现这一点有利作用。 相似文献
18.
19.
本文利用冲绳、台北、广州、海南四个电离层垂测站的f0F2月报表资料,分析东亚扇区赤道异常北峰的移动规律,得到北峰位置随季节、太阳活动不同周相的移动规律。并且发现赤道异常的两日振荡将引起北峰位置作相应的波动。 相似文献
20.
THE RESEARCH OF THE SEISMOGENIC STRUCTURE OF THE LUSHAN EARTHQUAKE BASED ON THE SYNTHESIS OF THE DEEP SEISMIC DATA AND THE SURFACE TECTONIC DEFORMATION 
下载免费PDF全文
下载免费PDF全文 WANG Lin ZHOU Qing-yun WANG Jun LI Wen-qiao ZHOU Lian-qing CHEN Han-lin SU Peng LIANG Peng 《地震地质》2016,38(2):458-476
The seismogenic structure of the Lushan earthquake has remained in suspensed until now. Several faults or tectonics, including basal slipping zone, unknown blind thrust fault and piedmont buried fault, etc, are all considered as the possible seismogenic structure. This paper tries to make some new insights into this unsolved problem. Firstly, based on the data collected from the dynamic seismic stations located on the southern segment of the Longmenshan fault deployed by the Institute of Earthquake Science from 2008 to 2009 and the result of the aftershock relocation and the location of the known faults on the surface, we analyze and interpret the deep structures. Secondly, based on the terrace deformation across the main earthquake zone obtained from the dirrerential GPS meaturement of topography along the Qingyijiang River, combining with the geological interpretation of the high resolution remote sensing image and the regional geological data, we analyze the surface tectonic deformation. Furthermore, we combined the data of the deep structure and the surface deformation above to construct tectonic deformation model and research the seismogenic structure of the Lushan earthquake. Preliminarily, we think that the deformation model of the Lushan earthquake is different from that of the northern thrust segment ruptured in the Wenchuan earthquake due to the dip angle of the fault plane. On the southern segment, the main deformation is the compression of the footwall due to the nearly vertical fault plane of the frontal fault, and the new active thrust faults formed in the footwall. While on the northern segment, the main deformation is the thrusting of the hanging wall due to the less steep fault plane of the central fault. An active anticline formed on the hanging wall of the new active thrust fault, and the terrace surface on this anticline have deformed evidently since the Quaterary, and the latest activity of this anticline caused the Lushan earthquake, so the newly formed active thrust fault is probably the seismogenic structure of the Lushan earthquake. Huge displacement or tectonic deformation has been accumulated on the fault segment curved towards southeast from the Daxi country to the Taiping town during a long time, and the release of the strain and the tectonic movement all concentrate on this fault segment. The Lushan earthquake is just one event during the whole process of tectonic evolution, and the newly formed active thrust faults in the footwall may still cause similar earthquake in the future. 相似文献