用于地震作用预测的弱震数字记录分析

本文中使用了麦迪奥台９０个小震的近震数字记录，这些小震分布在阿拉木图市附近，处在东经７６°４０’～７７°４０’和北纬４２°５０’～４３°２０’座标所局限的区域范围内。分析了ＣＫＭ信道水平分量Ｓ波振相的记录。对于所有被研究的数字地震记录，得到了如下动力学参数：基底最大位移的振幅Ａｍａｘ，与Ａｍａｘ相应的周期Ｔ和０．５Ａｍａｘ水平上的相对持续时间ｄ。这些参数是对于各个分量按每个滤波信道来测定的。编制了原始地震记录图以及最大振动分量的参数Ｔ和ｄ的整体分布。确定了７０％置信区间内的中值和误差。它们的分布接近于正态分布。对Ｔ和ｄ的研究表明；这些参数彼此互相关：周期愈大，相对持续时间的值也愈大。得到了Ｔ和ｄ与地震能级及震级的初步关系。     

塔里木地台西南缘皮山煌斑岩的^40Ar／^39Ar年龄及其地质意义

塔里木地台西南缘皮山县煌斑岩脉群为超钾系列的煌斑岩,侵位于元古宇角门片岩中。经~(40)Ar/~(39)Ar法测定,煌斑岩中金云母的等时线年龄为(231.7±0.3)Ma,全岩等时线年龄为(228.5±0.3)Ma。地球化学数据指示其源区为受俯冲     

ADULT DRAGONFLY COMMUNITIES IN TROPICAL RIVERS OF THE NORTHERN PENINSULAR MALAYSIA： SPECIES COMPOSITION, BIOTOPE AND HOST PLANT PREFERRENCES

1INTRODUCTION Manyfactorshavebeenlinkedwithobserved patternsofodonatediversity.Eachhabitatisdifferent andpresentsitsownopportunitiesforexploitationby welladaptedspecies(Krebs,1989).Theyaresensi tiveresponderstonewlycreatedphysicalandtogether withphysiogra…     

2004年9月28日加州帕克菲尔德M6．0级地震的初步报告

引言 2004年9月28日17时15分14秒(协调世界时)加州中部帕克菲尔德发生了一次 Mw6．0级地震。震中位于圣安德烈斯断层靠近戈尔德希尔附近的帕克菲尔德镇东南 11 km的地方(图1)。加州综合地震台网 (CISN)报告说,震源位于北纬35．819°,西经120．364°的8．8 km深的地下。根据余震的分布状况以及此次地震的地震图、应变变     

Towards an operational use of space imagery for oil pollution monitoring in the Mediterranean basin: a demonstration in the Adriatic Sea

Studies of operational pollution carried out by European commission - Joint Research Centre in the Mediterranean Sea for the years 1999-2004 are briefly introduced. The specific analysis of the Adriatic Sea for the same period demonstrates that this area has been characterized by a relevant number of illegal discharges from ships. After setting the historical background of the project AESOP (aerial and satellite surveillance of operational pollution in the Adriatic Sea), the content, partners and aim of the project are presented. Finally, the results of the first phase of the AESOP project are presented. The results seem very encouraging. For the first time in the Adriatic, real time detection of oil spills in satellite images and an immediate verification by the Coast Guard has been undertaken. An exploratory activity has also been carried out in collaboration with the University of Ljubljana to use automatic information system (AIS) to identify the ships detected in the satellite images.     

http://www.sciencedirect.com/science/article/pii/S1674987114000255

Geophysical studies point to a complex tectonic and geodynamic evolution of the Alboran Basin and Gulf of Cadiz.Tomographic images show strong seismic waves velocity contrasts in the upper mantle.The high velocity anomaly beneath the Alboran Sea recovered by a number of studies is now a well established feature.Several geodynamic reconstructions have been proposed also on the base of these images.We present and elaborate on results coming from a recent tomography study which concentrates on both the Alboran and the adjacent Atlantic region.These new results,while they confirm the existence of the fast anomaly below the Alboran region,also show interesting features of the lithosphere-asthenosphere system below the Atlantic.A high velocity body is imaged roughly below the Horseshoe Abyssal plain down to sub-lithospheric depths.This feature suggests either a possible initiation or relic subduction.Pronounced low velocity anomalies pervade the upper mantle below the Atlantic region and separate the lithospheres of the two regions.We also notice a strong change of the upper mantle velocity structure going from south to north across the Gorringe Bank.This variation in structure could be related to the different evolution in the opening of the central and northern Atlantic oceans.     

花岗质岩浆产生和演化过程中水的作用与来源

温度和含水量是形成花岗质岩浆最重要的两个参数。在大多数硅质岩浆中，水的含量为2－4wt%。水的主要来源有二，其一是地壳内含水硅酸盐的脱水作用，并视脱水矿物为白云平、黑云母或角闪石，所产生熔体的初始温度相应依次升高，成分由过铝质到偏铝质变为偏铝质到过碱质，K／Na比值、^87Sr/^86Sr初始比值和δ^18O值则依次降低。水的另一主要来源是由俯冲洋壳及上地幔（以含水玄武岩和安山岩的形式)迁移到地壳中的挥发分，所产生花岗岩的地球化学性质将随地壳岩浆与地幔岩浆的相对重要性而变化。     

DDT residue in soil and water in and around the abounded area of DDT manufacturing factory

Due to the persistent nature of DDT, a persistent organic pollutant and its adverse environmental and health impacts, the present study was undertaken to examine the residual DDT in and around DDT manufacturing factory in Amman Gharh, Nowshera, NWFP. The factory was established in 1963 and remained in operation till 1994. Composite samples of soil, sediments and water were collected in and around the factory area, nearby DDT stores, main factory drain leading to river and nearby villages. Standard procedures were used for the collection, transportation and storage of samples for analysis. Physical parameters for the collected water samples measured were temperature, pH and conductance. Extraction of each sample for DDT analyses was carried out in triplicates using soxhlet extraction apparatus. The extract was transferred to well washed, clean; dry glass vial, sealed and put in the refrigerator. Gas Chromatograph with electron capture detector and capillary column was used for analysis. DDT in the samples was identified on the basis of their retention time and quantified on the basis of peak areas. It is evident from the analytical data obtained in the present study that both water and soil in and around the factory area are still contaminated with DDT, despite the closure of the factory since the past few years.     

MATHEMATICAL MODELS FOR LIQUID-SOLID TWO-PHASE FLOW

I INTRODUCTIONTurbulence models for single-phase fluid flows have been developed and widely applied in mechanical,aeronautical, environmental and hydraulic engineering, and other fields. The closure techniques for theReynolds-averaged Navier-Stokes equations for various levels of models including the simple turbulencemodel, one-equation turbulence model, k-s turbulence model and turbulence stress/flux model have beenverified to be physically reasonable and have acceptable accuracy in app…