Evaluation of site effects by means of Joint Analysis of Sonogram and Standard Spectral Ratio (JASSSR)

In order to evaluate thefrequency dependence of site effects, thejoint analysis of the standard spectralratio technique with a sonogram approach isproposed (Joint Analysis of Sonogram andStandard Spectral Ratio). Two tools aresuggested: the enhanced sonograms andthe differential sonograms. Inparticular, the local geology effects areinvestigated by considering both theamplification of the seismic signals andtheir prolongation. Tests carried out onsynthetic signals show the capability ofthe sonogram approach to evaluate thefrequency-dependent lengthening of theseismic signal. The JASSSR is applied todata recorded by a dense local networkdeployed during the Umbria-Marche seismicsequence of 1997 and to data recorded inthe Volvi Test site (Euroseistest, Greece).The results show that using the JASSSR gives amore complete overview of the effects oflocal geology on seismic ground motion than maybe obtained by using the StandardSpectral Ratio alone. In particular, theeffect of secondary arrivals, both on theamplitude and on the lengthening of theseismic ground motion, can be pointed out.In addition, the characteristic frequencyof these arrivals can be evaluated.     

断层场地震害研究综述

本文介绍了国内外断层场地震害的研究现状和主要观点，指出了断层提高烈度的观点的片面性，阐述了我国地震考察中研究方法的创新和取得的主要研究结果，总结了断层场地的震害特征和非发震断层对震害无明显影响的主要结论。     

2002年山西太原郝庄ML5.0地震宏观烈度考察报告

对2002年9月3日山西太原郝庄ML5.0地震的宏观烈度进行了考察，得出极震区烈度为V度，呈椭圆形，长轴走向北北西，长度53km，短轴走向为北东东，长度34km，面积5660km^2的结论。分析了地震发生的构造环境，认为此次地震的震中位于东西、南北和北北西向三级断层的交汇部位，其中北北西向的东山山前断层为发震断层。     

Applications Of Electrical And Electromagnetic Methods For Environmental And Geotechnical Investigations

Electrical and electromagnetic methods are powerful tools in environmentaland geotechnical investigations. Techniques developed for deeper applications, such as mining,geothermal and crustal studies, are scaled for shallow targets by moving to higher frequencies,earlier decay times and/or smaller array configurations. Another extremely important factor is dense stationspacing, to reduce spatial aliasing, and high quality data to resolve small features. Hence, new instrumentsare concerned with making continuous or dense measurements with high precision, and interpretationalmethods fast enough to handle large datasets quickly. Continuously measuring electrical and time-domainelectromagnetic systems have been developed for geological mapping in hydrological investigations withone-dimensional inversion routines that are rapid and robust. At a smaller scale an electrical systemis used for archaeology studies with excellent results. Working to and above the upper limits ofthe quasi-static approximation, a very early time electromagnetic system is proving successful at mapping subsurfaceinfrastructure in areas of conductive, clay cover, where ground penetrating radar is ineffective.Induced polarization (IP) and resistivity systems that employ multiplexing techniques, while not continuouslymeasuring, allow for relatively rapid production rates and dense sampling for applications ranging fromlandfill and contaminant characterization studies, to verifying the integrity of engineeredsubsurface structures and monitoring infiltration in the vadose zone.     

Site-Specific Analysis of Strong Motion Data from the September 7, 1999 Athens,Greece Earthquake

The strong ground motion from Athens, Greece 07/09/1999 earthquake has been recorded by eighteen (18) stations, fourteen (14) within the central Athens area and four (4) at the centers of nearby towns. The ground conditions for most of the recording sites were identified, based on previous geotechnical investigations carried out in the wider area of the sites, and consequently correlated to the seismic motion characteristics. Hence, it has been possible to evaluate the accuracy of different seismological methods for site characterization and also estimate soil effects on peak ground acceleration and elastic response spectra. In addition, preliminary estimates are drawn for the seismic motion characteristics at the epicentral area, where no strong motion recordings are available. The detailed soil profiles at the recordingsites are placed in the Appendix.     

Study on inelastic attenuation coefficient, site response and source parameters in Shanxi region

Introduction Seismic recording is the information recorded by seismograph when earthquake occurs, which is a kind of comprehensive information, including the characteristics of earthquake focus, propagation path of seismic wave and site response, etc. Therefore, we must try to distinguish source effect, propagation path and site response in the seismic recordings in order to obtain accu-rate parameters. The method of Atkinson has better solved the problem (Atkinson, Mereu, 1992), which is bas…     

U-series dating of Locality 15 at Zhoukoudian, China, and implications for hominid evolution

This paper reports U-series dates on speleothem samples from Locality 15 at Zhoukoudian, one of the richest Paleolithic sites in northern China. The age of the lower part of Layer 2 is securely bracketed between 155,000 and 284,000 yr. The underlying Layer 3 dates back at least 284,000 yr. Layer 4, further below, should be older still, possibly by a cycle on the SPECMAP time scale before 284,000 yr ago. These ages, much greater than the previous estimates of 110,000-140,000 yr from U-series and electron spin resonance dating of fossil teeth, suggest that Locality 15 was broadly contemporaneous with Locality 4 (New Cave) and with the uppermost strata of Locality 1 (Peking Man site). The physical evolution and cultural development evidenced by the timing of the Zhoukoudian localities are in line with the opinion of Chinese anthropologists for a regional transition from Homo erectus to archaic Homo sapiens.     

我国高放废物深地质处置战略规划探讨

本文探讨我国高放废物地质处置的战略规划，提出我国高放废物处置库的开发可参考采用“三步曲”式的技术路线，即处置库选址和场址评价一特定场址地下实验室研究一处置库建设。处置库的选址和场址评价工作可与地下实验室研究的相关工作结合。以2040年前后建成处置库为目标，把工作划分为4个阶段，即选址和场址评价阶段、场址确认和地下实验室建设阶段、现场实验和示范处置阶段及处置库建设阶段，规划出各阶段的工作目标和工作内容。论证各项工作内容之间的逻辑关系，指出选址和场址评价是基础、基础研究和地下实验室研究是支撑、性能评价是“指挥棒”、设计并建造出符合标准的处置库是目标。将选址工作划分为预选地段对比、预选场址对比和场址确认3个阶段。按此规划设想，我国将在2015年以前确定处置库和地下实验室的场址，并开始建造地下实验室。2025年左右建成地下实验室，2040年建成处置库。     

内蒙古包头市阿善遗址鸟类化石

研究表明，内蒙古包头市阿善遗址的鸟类化石总计有5目7科10属10种鸟类，其中赤嘴潜鸭、白枕鹤和骨顶鸡为中国鸟类首次化石记录。阿善遗址鸟类群除3种为鸡形目地栖者外，其余全为涉水鸟类，是中国迄今为止首次发现的以水鸟为主体的史前时期鸟类群。这些鸟类化石对研究遗址的生态环境、气候变化以及鸟类地理分布、迁徙和演化等都有重要意义。     

神华煤液化项目浩勒报吉水源地地下水开发研究

摘要：浩勒报吉水源地位于鄂尔多斯的白垩系自流水盆地的中东部，白垩系下统志丹群三、四岩段承压水含水层为主要供水含水层，地下水量丰质优，是神华煤直接液化项目的理想供水水源。本次施工的20眼探采结合井，单井涌水量约在3000m^3／d以上，对神华煤液化一期需水3.0万m^3／d是有保证的。