南黄海中古生代残留沉积地层的地震成像

文中展示了南黄海中古生代沉积地层的成像结果,显示南黄海隆起区存在较稳定的中古生代沉积地层残留区.南黄海中古生代残留沉积地层的成像问题一直是地震资料处理的难点,主要原因是以海底鸣震为主的层间多次波和与中古生界顶界面相关的长程多次波非常发育,致使有效反射波无法准确识别.本文利用平面波域层间多次波的可预测性,对地震数据平面波分解之后进行预测反褶积,较好地消除了层间多次波.利用速度差异分离长程多次波,在有效波速度无法确定的条件下,先从低速的、可以确认的多次波开始进行分离,逐步确认并分离多次波,同时逐步进行有效波的确认和成像速度的尝试,最终得到合适的成像速度场和多次波被充分分离的数据.成像结果对南黄海残留盆地研究有一定借鉴意义.     

华北地区第四活动期两次地震活动过程的相似性研究

着重分析研究华北地区第四活动期以来M_S≥5.0地震时空分布特征。结果表明,该地区第四活动期从1820年至1976年期间,地震活动出现了前后两次基本相似的强弱起伏活动过程,分别历时69年和66年。前后两个活动过程不但时序结构类似,进程一致,且空间演化格局相似,都是先从华北地区的中南部开始,再迁移至东北部辽东半岛及附近海域,最终在华北地区北部集中出现一系列强震活动,而完成整个活动过程。进一步分析表明,前后两活动过程的第一阶段6级以上强震,在空间分布上除南黄海地区外,基本上互不重复。这一现象的发现,有助于该地区今后地震活动主体区域的分析判断。     

关于辽宁地区b值方法定量预测的研究

本文利用地震学分析预报方法程式指南和“八五”攻关成果中提出的地震b值定量预测方法,对辽宁及邻区1969年以来发生的8次地震震例作了回顾性检验研究。在此基础上,根据震前b值的变化特征,总结出了可能适用于辽宁地区半年左右尺度的b值预测方法的异常羊别指标及预报规则。     

A new inverse method and application to ocean data

A new method is proposed to inverse normalization data of hidden variables in a dynamical system by embedding a time series in multidimensional spaces and applying a normalization analysis to the conditional probability density of points in the reconstructed phase spaces. The method is robust in the application to Lorenz system and 4-dimensional R?ssler system by testing quantitatively and qualitatively the correlation coefficient between inverse data and original data in time domain and in frequency domain, respectively. By applying the method to analyzing the South China Sea data, the normalization data of wind speed is extracted from the sea surface temperature time series.     

Analytical Model for Permeability Evolution in Microcracking Rock

— Analytical expressions to predict the enhancement of permeability due to stress-induced microcracking in initially low porosity rock are presented. A fracture mechanical microcrack model is employed to derive integrated effective hydraulic variables as a function of stress, which are then used to calculate the evolution of permeability using the statistically-based Dienes model. The model enables determination of permeability enhancement as a function of two loading parameters and three material parameters. Results are in reasonable agreement with experimental measurements and indicate that appreciable increases in permeability can be anticipated during brittle failure. The analytical nature of the model makes it easily incorporatable into numerical models that require quantification of the permeability evolution as a function of stress, for which there is currently no law.     

美国城市搜索与救援体系的组成及运作模式概述

美国城市搜索与救援体系是世界上最完善的体系之一，多年来在城市救灾和应对突发事件中发挥了重要作用，减轻了生命和财产的损失。文章概述了美国城市搜索与救援体系的组成、任务、运作原则和管理机构及支援机构。     

地震灾害现场救援搜索策略与搜索方法有关问题的讨论

对地震灾害现场的搜索策略和搜索方法等有关问题进行了讨论，推荐了常用的搜索策略，对不同搜索方法的利弊进行了分析；对搜索方法的使用也做了讨论。通过讨论，文章就搜索分队的组成、任务、装备和部署等提出了建议。     

DISTRIBUTIONS AND HYDROLOGICAL CHARACTERISTICS OF TROPICAL CYCLONE RAINSTORMS AND FLOODS IN CHINA

I.horoductionPleNorthwestPacificOceanisti1elnostfrequentlyaffeCtedareaoftropicalcyclone(TC).AboLIt36percentTCoftheworldoccurinffosarea[2],andthenumberofTCWhichlandedonChinawiti1n1akimumwindforcescalesoverlOisabout35percentofti1atintheeastemcoastalcoLUitriesofAsia[l].BothrainstormsandfloodsMide,theidriuenceofTCareheaVyinChina,suchastherainfalldePthof2749mm/3datXinliao,Taiwanandpeakdischargeof44,6oOm'/satHuanggo(55,42okn'),YalujiangRjver.Therefore,TCisanimportantfaCtorforflooddisas…     

测量不确定度的验证方法

本文介绍了测量不确定度的验证方法,并举例说明.     

A proposal for the theoretical analysis of the interactive coupled effects between urbanization and the eco-environment in mega-urban agglomerations

Mega-urban agglomerations are strategic core areas for national economic development and the main regions of new urbanization. They also have important roles in shifting the global economic center of gravity to China. However, the development of mega-urban agglomerations has triggered the interactive coercion between resources and the eco-environment. The interactive coupled effects between urbanization and the eco-environment in mega-urban agglomerations represent frontier and high-priority research topics in the field of Earth system science over the next decade. In this paper, we carried out systematic theoretical analysis of the interactive coupling mechanisms and coercing effects between urbanization and the eco-environment in mega-urban agglomerations. In detail, we analyzed the nonlinear-coupled relationships and the coupling characteristics between natural and human elements in mega-urban agglomerations. We also investigated the interactive coercion intensities between internal and external elements, and the mechanisms and patterns of local couplings and telecouplings in mega-urban agglomeration systems, which are affected by key internal and external control elements. In addition, we proposed the interactive coupling theory on urbanization and the eco-environment in mega-urban agglomerations. Furthermore, we established a spatiotemporal dynamic coupling model with multi-element, multi-scale, multi-scenario, multi-module and multi-agent integrations, which can be used to develop an intelligent decision support system for sustainable development of mega-urban agglomerations. In general, our research may provide theoretical guidance and method support to solve problems related to mega-urban agglomerations and maintain their sustainable development.