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排序方式: 共有181条查询结果,搜索用时 62 毫秒
71.
72.
Ruizhi Wen Zhenghua Zhou Xiaojun Li Cheng Yang Yuhuan Wang Quan Liu Xiaotao Yin Mindu Zhou Jianwen Cui Institute of Engineering Mechanics China Earthquake Administration Harbin China Earthquake Administration of Gansu Province Lanzhou China Earthquake Administration of Yunnan Province Kunming China 《地震学报(英文版)》2009,(2):181-187
In this paper, the mobile strong ground motion observation for the destructive earthquake is introduced.Considering the characteristics and its spatial distributions of aftershock, 59 strong ground motion instruments were installed along the Longmenshan fault area, and more than 2 000 records have been accumulated.It shows that it is necessary to per-form the mobile strong ground motion observation after the destructive earthquake, and the precious collected data could be applied for further research. 相似文献
73.
Dawei Lu Jianwen Cui Xiaojun Li Weiping Lian National Earthquake Infrastructure Service China Earthquake Administration Beijing China Earthquake Administration of Yunnan Province Kunming China Institute of Engineering Mechanics Harbin China 《地震学报(英文版)》2010,(1):95-100
The great MS8.0 Wenchuan earthquake has been the most destructive earthquake since 1949 in China. The earthquake occurred no more than half a year after the establishment of the National Strong Motion Observation Network System (NSMONS) of China; what is more, the epicenter was located in the area with dense strong motion observation stations so that a large number of strong motion records of the main shock were obtained. In this paper, 501 strong motion records from 167 observation stations are utilized to... 相似文献
74.
福建龙海牛头山新生代玄武岩橄榄岩包体的水 总被引:1,自引:0,他引:1
对福建龙海牛头山新生代玄武岩中橄榄岩包体进行了傅利叶变换红外光谱(FTIR)分析,结果显示,二辉橄榄岩中的辉石包体含有结构水,均以OH的形式存在,结构水含量分别如下: 单斜辉石为(151~845)×10-6,斜方辉石为(40~710)×10-6,全岩为(25~90)×10-6.无论是辉石中的水含量还是全岩中的水含量,福建牛头山地区均高于华北克拉通的安徽女山、河北汉诺坝和苏北盆地,而与同是华北克拉通的河北阳原地区水含量相当.实验证明辉石是牛头山地区上地幔重要的水储库.初步推断福建牛头山经历了洋壳俯冲作用及底侵作用. 相似文献
75.
Xishuangbanna of Yunnan Province is a famous tropical foggy region. A field experiment wascarried out from November 23 to 30 of 1997 during which fogs occurred regularly every day. In thepaper the characteristics of macrostructure of fog are analyzed and the physical processes offormation and dissipation of fog are studied. The results show that the Xishuangbanna valley fogforms firstly in the lower atmosphere with two-layer structures and then develops suddenly in thevertical direction after reaching the ground. Furthermore, the vegetation effect on the formationand dissipation of fog is discussed specially. 相似文献
76.
前兆异常与强震时空点的研究 总被引:2,自引:0,他引:2
本文研究了云南三次7 级以上强震前的小震活动, 前兆异常总台项频数变化, 地下水时空特征。得出在大震前3 ~6 个月前兆异常台项总频数的升高现象与30 ~39 级小震向震中区收缩的时间大致同步, 可能是大震前的异常从短期向短期临震过渡的时间标志。震前1 ~3 个月出现的前兆台项总频数异常峰值和水位、水氡的场兆现象则是异常进入短期临震的时间; 峰值回落是震源区进入临震状态的时间。 相似文献
77.
Xu Chunrong Lin Yunfang Lu Guifang Zhao Ming Li Shengxiang Gou Xianbin Yu Jingzhong and Zeng XiaopingInstitute of Crustal Dynamics CSB Beijing China Institute of Geophysics CSB Beijing China Seismological Bureau of Yunnan Province Kunming China Seismological Office of Chongqing Municipality Chongqing China 《中国地震研究》1998,(4)
Many earthquakes occurred during the period 1994 -1996 in Sichuan and Yunnan Provinces, Southwest China. Taking the process of the initial main phase recovery phase of the magnetic storm as the process of load-unload response of the geomagnetic field to the solar wind, we have estimated and analyzed the distribution in time and space of the load-unload response ratio P(z) of the storm time disturbance daily variation of the vertical component Z of the geomagnetic field at ten stations in Southwest China. We found that the area with high ratio P(z) was just the area where moderately strong earthquakes would occur from 44 days to 15 months later. The relationship between the high ratio P(z) and weather disasters in both seismic and non-seismic areas is discussed briefly. 相似文献
78.
基于数字岸线分析系统的海岸线时空变化速率分析——以海州湾为例 总被引:2,自引:1,他引:1
本文选取1985?2018年间具有代表性的6期Landsat遥感影像,运用数字海岸线分析系统,综合利用面积法和基线法定量分析海州湾的岸线变迁,并进行岸线分类和驱动力分析。结果表明,30多年来海州湾岸线整体呈持续向海推进的态势,增长岸线比例总体处于不断增加的趋势,除了2005?2009年发生短暂的减小;1985?2018年,岸线长度增加了10.40 km,陆域面积增加了52.84 km2;海州湾岸线以人工岸线为主,且比重日渐增大,从1985年的47.90%到2018年的70.88%,前中期的沿海围垦养殖及后期的围海造陆是海岸线变迁的主要驱动力;其终点变化速率为26.09 m/a,净海岸线变化为155.12 m,记录增加总横断面在各个时期均大于50%,岸线变迁最剧烈的区域为新沭河?高公岛段,陆域增长点在于赣榆新城、连云新城建设和连云港港口建设。 相似文献
79.
Li-Hong Yan Jian-Cheng Wang Yunnan Observatory /National Astronomical Observatories Key Laboratory for the Structure Evolution of Celestial Objects Chinese Academy of Sciences Kunming China Graduate School of Chinese Academy of Sciences Beijing China 《中国天文和天体物理学报》2011,(6)
We present a new explanation for the origin of the steep power-law(SPL) state of X-ray binaries.The power-law component of X-ray emission is the synchrotron radiation of relativistic electrons in highly magnetized compact spots orbiting near the inner stable circular orbit of a black hole.It has a hard spectrum that extends to above MeV energies,which is determined by the electron acceleration rate.These photons are then down-scattered by the surrounding plasma to form an observed steep spectrum.We discuss ... 相似文献
80.
Xiao-Yan Gao Jian-Cheng Wang Ming Zhou National Astronomical Observatories /Yunnan Observatories Chinese Academy of Sciences Kunming China Key Laboratory for the Structure Evolution of Celestial Objects China Graduate University of Chinese Academy of Sciences Beijing China 《中国天文和天体物理学报》2011,(8)
The external Compton(EC) model is used to study the high energy emission of some blazars,in which the external photon field is considered to dominate inverse Compton radiation. We explore the properties of the external photon field through analyzing the FERMI LAT bright AGN sample within three months of the start of operations in sky-survey mode. In the sample,assuming the high energy radiation of low synchrotron peaked blazars is from the EC process,we find that the external photon parameter Uext/νext may ... 相似文献