中国数字化地震观测系统

介绍了中国地震局“九五”重点项目中国数字化地震观测系统，特别重点介绍了中国数字化地震台网、国家标准数字化地震台、中国地震局卫星数据通信网、中国数字地震台网中心的建设规模、设计思路、技术参数、设备结构、服务功能，以及中国数字地震台网的运行流程和运行状况。     

Carbon and strontium isotope variations and responses to sea-level fluctuations in the Ordovician of the Tarim Basin

In the Ordovician, a carbonate platform system grading from the platformal interior eastwards to basin was developed in the Tazhong area of the Tarim Basin, and the study column is located in the place where the paleoslope occurred. The isotope compositions of the carbonates there are thus considered as having reflected those of simultaneous sea waters in view of its good connection with the open seas. The carbon and strontium isotope compositions of the Ordovician carbonates in the Tazhong area are analyzed, and their relationships to the sea-level fluctuations are discussed as well. Studies have revealed that the carbon isotope composition is related positively with the sea-level fluctuations, whereas an opposing situation occurs to the strontium isotope variation. Similar responses of carbon and strontium isotope compositions to the sea-level fluctuations are reported elsewhere in the world, suggesting that the Ordovician sea-level fluctuations of the Tarim Basin were of eustatic implication.     

甘肃南金山金矿床的~(40)Ar-~(39)Ar同位素年龄及其地质意义

南金山金矿是我国西北地区最重要的金矿床之一 ,矿床产于下石炭统白山组浅变质海相火山碎屑岩中。本文通过对金矿床中的蚀变绢云母进行了40 Ar 3 9Ar同位素年龄测定 ,获得了两组数据 ,分别为 2 5 0 .6±2 .8Ma和 2 32 .7± 4.1Ma ,说明南金山金矿的形成经历了两期成矿作用。     

数字式智能化锚索预应力传感器的研究与设计

预应力传感器是锚固工程，预应力混凝土工程，预应力桥梁工程等领域进行监测，研究与试验必不可少的测量用传感器，在分析预应力传感器[研究现状的基础上，详细了介绍了数字式智能化锚索预应力传感器的工作原理，结论设计，计量检定结果，主要特点和应用情况。     

塔里木北部地区岩石物性参数测试和区域层滑系统的确定

为了定量地研究塔里木北部地区区域的层次结构．拆离构造，特别是同油气地质、圈闭构造密切相关的沉积盖层中的层滑倾滑和推覆滑覆等各种构造的形成机制，对该区沉积盖层进行了较系统的岩石物性和岩石力学标本采集和测试（包括三轴参照实验）．依其参数结构特点和地质、物探资料，划分出４套７层区域性层滑系统，并与研究程度较高的中、下扬子区的物性参数、岩性组合和构造特征进行综合对比．最后还进一步阐明了塔里木北部地区特征的前列式冲断构造和含油气局部构造等，均受到这７层区域层滑系统的制约．     

地震数据数字化及实时传输

简要地介绍了地震数据国际交换试验系统和台站地震数据实时采集传输系统的组成、各部分的特性与功能、地震数据数字化及实时传输过程。     

多种岩石的Qp,Qs,Qc

本采用脉冲传播谱振幅比法、能量法、尾波法分别测多种岩样的Ｐ波Ｑ值、Ｓ波Ｑ值及尾波Ｑ值。结果表明，能量法所得Ｑｐ、Ｑｓ较小。谱振幅比法所得Ｑｐ一般居中，Ｑｓ较大。尾波Ｑｃ有的偏大，有的偏小。     

激光荧光遥感系统在地物识别上的应用研究

应用我国自行研制组装的激光荧光遥感系统,测试了包括岩石、土壤、植物、水体以及人工建筑材料在内的各种样品的激光诱导荧光光谱。研究结果表明,应用地物荧光峰的位置、强度及它们的组合指标,不仅能区分上述各基本类型的地物,而且还能往下级单元续分。还表明,激光荧光遥感系统具有相当广泛的应用前景,在某些方面可望超过当前常用的、以反射光谱为基础的被动式遥感。     

An overview of the Madden-Julian oscillation and its relation to monsoon and mid-latitude circulation

In the past decade there has been extensive research into tropical intraseasonal variability, one of the major com-ponents of the low frequency variability of the general atmospheric circulation. This paper briefly reviews the state-of-the-art in this research area: the nature of the Madden-Julian Oscillation, its relation to monsoonal and extratropical circulations, and the current theoretical understandings.