地震速报(Ms≥4.0)的震级校正——以伽师震群为例

1997年 1月 2 1日～ 1 999年 2月 2 8日 ,伽师发生了 Ms≥ 4 .0级地震 1 0 6次。通过分析对比速报和编目震级资料 ,发现速报震级偏差较大。应用线性拟合结合偏差分析的方法 ,对伽师震群速报震级进行了校正。通过对校正前后的结果比较以及 T假设检验 ,其效果相当理想     

引用JOOMLA平台快速搭建基于WEBGIS的流动地震前兆台网信息系统

为了解决福建省流动前兆地震台网基础信息保存分散和查询检索的不便,本文采用JOOMLA开源CMS系统,结合Google map API,快速架构了基于WebGIS的流动地震前兆台网信息系统。该信息系统具有查询福建省流动观测台网台站信息、测项信息、地理信息、人员信息等基础信息数据的功能,并可动态浏览地图,进行地图检索与数据库备份,极大方便了科技管理人员快速查询流动地震台网信息。     

A parabolic equation extended to account for rapidly varying topography

In this paper, following the procedure outlined by Li (1994. An evolution equation for water waves. Coastal Engineering, 23, 227-242) and Hsu and Wen (2000. A study of using parabolic model to describe wave breaking and wide-angle wave incidence. Journal of the Chinese Institute of Engineers, 23(4), 515–527) and Hsu and Wen (2000) the extended refraction–diffraction equation is recasted into a time-dependent parabolic equation. This model, which includes higher-order bottom effect terms, is extended to account for a rapidly varying topography and wave energy dissipation in the surf zone. The importance of the higher-order bottom effect terms is examined in terms of the relative water depth. The present model was tested for wave reflection in a number of different environments, namely from a plane slope with different inclinations, from a patch of periodic ripples. The model was also tested for wave height distribution around a circular shoal and wave breaking on a barred beach. The comparison of predictions with other numerical models and experimental data show that the validity of the present model for describing wave propagation over a rapidly varying seabed is satisfactory.     

砖红壤速效磷3种测定方法的比较

用Ｏｌｓｅｎ、Ｂｒａｙ－１ 和Ｍｅｈｌｉｃｈ－３ 三种方法对不同植被下的砖红壤进行速效磷的测定比较。结果表明：种植橡胶的土壤磷,Ｂｒａｙ－１ 法和Ｍｅｈｌｉｃｈ－３ 法间有较好的一致性,且呈显著相关;种植甘蔗的土壤磷,三种方法间均呈极显著相关;而种植其它植物的土壤磷,方法间的一致性较差,相关也不显著。一般情况下,建议不要用Ｍｅｈｌｉｃｈ－３ 作为砖红壤速效磷的提取剂。