| 1. | The results can show when the 24 - hour period of the gcrs disappeared and when they emerged again . we also analyzed the 27 - day periodicity of the gcrs " intensity
分析结果可以看出银河宇宙线强度的24小时周期和27天的周期何时消失，何时又重新出现。 |
| 2. | Though many results have been obtained so far , it is still in the research stage and far from being used in practical predictions
磁暴前银河宇宙线强度的谱分析主要还是采用最大熵方法和fourier方法，尽管得到不少结果，但离实际应用还是有一定的距离。 |
| 3. | It is the very reason that many scientists try to make the prediction of geomagnetic storms by analyzing gcrs variation properties before the commencement of a geomagnetic storm
正是由于这个特性，国际上很多科学家试图利用磁暴前银河宇宙线强度变化的先兆特征来进行地磁暴预报。 |
| 4. | We also made a statistical study on precursors appeared in gcrs before major and large geomagnetic storms only by using the two cusp stations " nm data obtained at mcmurdo and thule
对大磁暴前银河宇宙线强度的变化和各向异性进行的统计分析分析表明，银河宇宙线强度在磁暴前是有先兆的。 |
| 5. | The statistical results show that there are about 66 . 7 % geomagnetic storms with precursors in gcrs . we can roughly judge the cmes " direction when passing through the earth by using the two nm station data
其先兆特征为宇宙线强度的增加、减少和各向异性有较大的提高，分析结果表明采用这种方法进行分析，约66 . 7的大磁暴前有先兆。 |
| 6. | The ocrs intensity with the periods of 32 - 64 hours increased remarkably for those events that ocrs intensity decreased before the geomagnetic storms , while the intensity of ocrs with the periods shorter than 24 - hour are not obvious
对于磁暴前银河宇宙线强度减弱的事件，如1982年7月事件，周期为32 ? ? 64小时的信号幅度有较明显的增强，而周期低于24小时的信号变化非常不明显。 |
| 7. | Because catastrophic space weather events occur in general very suddenly , such as geomagnetic storms with sudden commencements . forbush decrease ( fds ) in ocrs intensity is also a kind of sudden event . the properties of these sudden events " are very evident
山ttsh下降也是全球范围内银河宇宙线强度的突然下降，这是cme到达地球后对全球台站记录的宇宙线强度造成突然的影响，这些突发事件其突发特征非常明显。 |
| 8. | We still analyzed the time - frequency variation properties of the data before several selected geomagnetic storms . the result shows that the gcrs " intensity with period of 16 - 32 hours increased remarkably for those events that ocrs intensity increased before the geomagnetic storms
对于磁暴前银河宇宙线强度增强的事件，银河宇宙线周期为16 ? ? 32小时的信号都有较明显的增强，部分事件银河宇宙线周期为儿个小时的信号也明显提高（如1991年的事件） 。 |
| 9. | The results show that there are really obvious scintillation in gcrs intensity at the periods of 10 - 60 minutes as expected by many scientists , such as dorman , et al . then we analyzed the data observed at beijing snm between two solar cycles " transitional phases by using wavelet method
我们还计算了几个磁暴前银河宇宙线强度的短周期的变化特征，计算结果显示，磁暴前银河宇宙线强度在10 ? 60分钟范围内出现明显的闪烁，这是磁暴前银河宇宙线强度变化的的一种先兆特征。 |
| 10. | This paper analyzed the data obtained at mcmurdo and thule neutron monitor ( nm ) stations and at guangzhou muon monitor station during the cme event in march 1991 . the results show that in this event when the cme structure passed the earth , it was shifted to the earth ' s southern hemisphere and the strongest magnetic structure associated with the cme passing the earth at about 2000ut , march 24 . 1991
我们利用mcmurdo和thule两个台站的银河宇宙线强度的观测数据和广州多方向介子探测器记录的宇宙线强度的数据分析了1991年3月cme的特征，注意到cme是一定程度地偏向地球的南半球，并给出了cme中最强的磁场结构到达磁层的时间为1991年3月24日2000ut左右，这是过去没有注意到的一个特征。 |
