基于Nagios软件的综合短信联动告警系统在地震行业中的应用研究   总被引：8，自引：0，他引：8  

李刚  王晓磊  孙路强  姚兰予  周利霞  齐士超  姚会琴  刘文兵 《地震研究》2012,35(1):133-138,158

阐述了基于Nagios开源网管软件的手机短信联动告警系统的研制思路与初步应用效果,探索了网络化的地震监测系统中告警信息的分析、处理和多级联动分发技术。  相似文献   

地震应急快速触发与短信息发送软件的核心技术和实现方法          下载免费PDF全文

刘胜国  蒋春花  高景春  冯录刚  常亮  李永庆  胡斌  王立军  丁瑞同 《地震工程学报》2010,32(2):196-200

重点介绍了地震应急快速触发响应系统中地震应急快速触发和短信息发送两个软件模块的核心功能、实现方法、模块间接口等内容,并具体介绍了各部分的主体技术方法、原理和实现流程等内容。  相似文献   

1976年M_S7.8唐山地震断层动态破裂及近断层强地面运动特征          下载免费PDF全文

杜晨晓  谢富仁  张扬  史保平 《地球物理学报》2010,53(2)

采用美国南加州地震委员会(SCEC)Steven Day博士提供的三维有限差分断层瞬态破裂动力学模型(3D-FDM),以1976年唐山M_S7.8地震为例,从简化的断层双侧破裂模式出发,对该地震发震断层的动态破裂过程及近断层地表运动特征进行了仿真模拟和计算.研究区域为围绕发震断层200 km×140 km×40 km(深度)的长方形块体组成,模拟计算的空间分辨率和时间分辨率分别为200 m和0.012 s,形成的空间网格节点数为1051×701×201.在DELL小型上作站上,我们实现了对源程序的移植和并行计算.同时,通过引进计算机可视化技术,对模拟数据进行了3D/4D解释分析.另外,在对源程序修改过程中,实现了对京津唐地区三维地壳速度结构的嵌入,在一定程度上增强了对地震波传播以及地面运动模拟的真实性,并讨论了地震破裂的方向性对近断层地表运动的影响.最后根据初步研究结果结合京津唐地区活动断层构造特征,对唐山M_S7.8级主震后随之而来的1976滦县M_S7.1级余震及宁河M_S6.9级余震的动态触发机制提出了新的解释.由于受主震破裂方向性作用的影响,使得主震对后续两个较大余震产生的动态应力变化的峰值在断层的走滑方向上较大,为2～3 MPa,在逆冲方向上较小,为0.1～0.2 MPa.即唐山主震的发生使得其周边的应力场有一个瞬态的应力调整,唐山主震对后续余震的发生有促发作用.  相似文献   

Research Progress on Physical Parameterization Schemes in Numerical Weather Prediction Models     

Ma Leiming  Bao Xuwei 《地球科学进展》2017,32(7):679-687

Atmospheric physics in numerical weather prediction model which predominantly determines the evolution of atmospheric processes is mainly described by physical parameterization. As a result, the development of physical parameterization has been a hot research issue in the area of numerical prediction for a long time. In this regard, the theoretical background and history of physical parameterization schemes for convection, microphysics, and planetary boundary layer, were reviewed in this study. It is suggested that the advance of physical parameterization for the model with high-resolution grid spaces should be considered as a principle issue for numerical model development in the future. Although the gird spaces in current operational numerical models generally decrease toward 10 km owing to the rapid development of high-performance computation, yet most of these schemes are designed for coarse grid spaces. Because of this kind of deficiency, the theoretical basis of these schemes inevitably faces controversy. Directions for development of physical parameterization were also suggested according to the trends of research in numerical prediction.  相似文献   

Clearing enhances dust devil formation     

T.J. Lyons  U.S. Nair  I.J. Foster   《Journal of Arid Environments》2008,72(10):1918-1928

In the southwest of Western Australia, the large scale replacement of native perennial vegetation with agriculture based on winter growing annual species leads to a significant change in the surface albedo and roughness. Whilst the redistribution of the surface energy balance impacts on cloud climatology, the reduced roughness of the agricultural area has enhanced the injection of aerosols into the atmosphere through the increased potential for dust devils. Although the native vegetation experiences a higher sensible heat flux, it is the reduced frictional drag of the cleared agricultural lands that enhances the potential for dust devil formation and thus provides an additional source of atmospheric aerosols.  相似文献   

卫星观测到的青藏高原雷电活动特征   总被引：19，自引：6，他引：13  

郄秀书  Ralf Toumi 《高原气象》2003,22(3):288-294

利用TRMM卫星上携带的闪电探测系统获取的闪电定位资料首次对青藏高原上的闪电活动进行了研究。研究发现,青藏高原上的闪电活动呈现出大陆性气候特征,但是受其特殊地形的热力和动力特征所调制,高于93％的闪电活动发生于5—9月之间,并在夏季出现单一闪电活动峰值。随着地表加热和湿度的增加,闪电活动在5月份开始明显增加。较高的闪电密度发生在高原的中部,揭示了闪电活动与地形特征的相关性。63％的闪电活动发生于14：00—18：00(地方时,下同)之间,而只有＜3％的闪电发生于00：00—l0：00之间。闪电光辐射能的时平均值也呈现出明显的日变化,随着太阳的升起,闪电光辐射能在08：00开始增加,并在l0：00达到稳定的极大值,直到02：00开始明显减小。闪电的光辐射能在高原北部呈现最大值,高原西部呈现最小值。青藏高原上的闪电放电强度比其它地区弱得多,其差别归因于高原上较低的对流不稳定能量。  相似文献   

MAGE ANALYSIS OF GEOSTATIONARY METEOROLOGICAL SATELLITE FOR MONITORING MOVEMENT OF MESOSCALE CONVECTIVE SYSTEMS OVER TIBETAN PLATEAU     

《中国地理科学(英文版)》2005,(3)

1IN TR O D U C TIO NRecentevidencehasindicatetdhatdisastewreathercon-dition,ssuchasstorms,typhoons,andintensivceonvec-tion,aredirectliynfluencde by MesoscaleConvectiveSystems(MCSs)(JIANG and FAN,2002).Also,theMCSs,whichmove outoftheTibetanPlatea,uarerela-…  相似文献   

Observations of the Relation Between Upslope Flows and the Convective Boundary Layer in Steep Terrain   总被引：1，自引：1，他引：0  

C.?ReutenEmail author  D.?G.?Steyn  K.?B.?Strawbridge  P.?Bovis 《Boundary-Layer Meteorology》2005,116(1):37-61

Slope flow mechanisms are crucial for the transport of air pollutants in complex terrain. Previous observations in sloping terrain showed upslope flows filling the entire convective boundary layer (CBL) and reducing air pollution concentrations by venting air pollutants out of the CBL into the free atmosphere. During the Pacific 2001 Air Quality Field Study in the Lower Fraser Valley, British Columbia, Canada, we observed slope flows during weak synoptic winds, clear skies, and strong daytime solar heating. With a Doppler sodar we measured the three wind components at the foot of a slope having an average angle of 19° and a ridge height of 780 m. We operated a scanning lidar system and a tethersonde at a nearby site on the adjacent plain to measure backscatter of particulate matter, temperature, wind speed, wind direction, and specific humidity. Strong daytime upslope flows of up to 6 m s⁻¹ through a depth of up to 500 m occurred in the lower CBL, but with often equally strong and deep return flows in the upper part of the CBL. The mass transport of upslope flow and return flow approximately balanced over a 4-h morning period, suggesting a closed slope-flow circulation within the CBL. These observations showed that air pollutants can remain trapped within a CBL rather than being vented from the CBL into the free atmosphere.  相似文献   

热带西太平洋对流活动与中国夏季降水   总被引：1，自引：0，他引：1       下载免费PDF全文

宋文玲 《应用气象学报》2005,16(Z1):63-69

利用 1 979～ 2 0 0 3年月平均射出长波辐射 (OLR)资料 ,分析了中国夏季江淮多 (少 )雨年的同期及前期热带太平洋地区OLR场分布特征。通过定义和计算OLR对流强度指数 ,探讨对流活动与中国夏季雨型的关系。结果表明 ,夏季热带西太平洋地区平均对流活动强度与同期江淮地区降水有很好的反相关关系 ,即当热带西太平洋地区对流活动强时 ,江淮地区降水易偏少 ,当对流活动弱时 ,江淮地区降水易偏多。不仅如此 ,前期冬、春季对流活动强度与夏季对流活动强度有明显的正相关关系 ,则可利用前期冬、春季对流活动强度对当年中国夏季降水趋势进行预测和补充订正。因此 ,热带西太平洋地区对流活动强弱对于中国夏季降水预测有一定的指示意义。  相似文献   

Chondritic osmium isotopic composition of Archean ophiolitic mantle, North China craton     

Timothy M. Kusky  Xiachen Zhi  Jianghai Li  Qiongxia Xia  Tsilavo Raharimahefa  Xiongnan Huang 《Gondwana Research》2007,12(1-2):67

Podiform chromitites are diagnostic but rare features of Phanerozoic ophiolites, and often contain the most pristine textural, chemical and isotopic record of convective upper mantle conditions extant during ophiolite genesis. Ophiolitic podiform chromitites, owing to their high Os concentrations and low Re/Os ratios provide the best evidence for the Os-isotopic evolution of oceanic mantle, but established records of ophiolitic chromites from bona fide Archean ophiolites are still lacking. We report Re–Os isotopic compositions of the world's oldest known ophiolitic podiform chromites from the 2.5 billion year old Dongwanzi–Zunhua ophiolite, North China. This provides the oldest Os isotope composition for the convective upper mantle yet obtained from ophiolitic podiform chromitites, and reveals a chondritic Os isotopic composition of the Archean convective upper mantle.  相似文献