1927年古浪8级大震地表破裂特征及形成机制   总被引：10，自引：3，他引：7       下载免费PDF全文

侯康明 《地震地质》1998,20(1):20-26

野外考察结果表明,１９２７年古浪８级大地震造成了６段不同规模、不同方向、不同力学成因、不同等级的地表破裂,构成了呈面状分布的复杂地震破裂带,与我国西部地区由走滑断层运动形成的破裂带相比具有较大差异。其中的４段破裂与极震区及余震分布的位置相重合,主体散布在冬青顶北麓一带,沿皇城－双塔活动断裂的东段和武威－天祝活动断裂北段分布,是１９２７年古浪地震的主破裂带。其余两段分别分布在Ⅸ度区内的皇城－双塔断裂中段和西山堡－滴水崖断裂带上,是高烈度区内的次级破裂。４段主破裂是在统一构造应力场作用下形成的产物,具有统一变形机制。其中冬青顶张性破裂带是发育在山前下方寨－严家新庄逆断层上盘的次级张性破裂,而主破裂是由逆断层运动在寺儿沟滩等处的山前洪积台地上产生的  相似文献   

三维地震数据的方位角时差校正及其应用     

侯爱源  曾锦光 《物探化探计算技术》1998,20(3):270-273

三维地震数据的同一共中心点道集是由不同方位角的地震道组成的。当地下地层倾斜时,共中心点道集的反射同相轴就存在方位角时差。本文根据方位角时差校正（ＡＭＯ）的基本原理,从ｆ－ｋ域的正、逆ＤＭＯ出发,通过稳相法得到积分法ＡＭＯ脉冲响应的时间、振幅因子公式。把ＡＭＯ应用于一束实际三维地震数据处理,经ＡＭＯ处理后的剖面绕射波和断面反射波得到了加强,其效果是令人满意的。  相似文献   

金属成矿各论(二)          下载免费PDF全文

侯德封 《地质科学》1965,6(4):303-312

本文从分散元素讨论金属成矿问题,这必然涉及到与它们共存金属的成矿体系。因而提出金属元素的产生和资源类型之间的关系问题,供今后研究。一、一般情况分散元素是一个经验名词,是指常存在于另一种主金属矿物中的元素,它们虽在一定条件下也可以形成独立矿物,但是它们很少形成自己的独立矿石。因此,找分散元素的富集点常是在金属矿石里下工夫。  相似文献   

黄河三角洲短期暴雨预报系统   总被引：1，自引：0，他引：1  

张经珍  郝家学  候淑梅  孙忠欣 《气象》1998,24(9):46-50

在天气学分析的基础上,利用１９９０～１９９５年日本数值预报产品与实时资料相结合,研制黄河三角洲短期暴雨预报系统,经１９９６年使用效果较好。  相似文献   

A COMBINED MODEL OF WIND, WAVE, TIDE AND STORM SURGES     

Xie Qiang  Hou Yi-jun  Yin Bao-shu  Fan Shun-ting  Cheng Ming-hua 《中国海洋湖沼学报》2000,18(4):297-300

A combined numerical model of wind, wave, tide, and storm surges was built on the basis of the “wind field model in limited sea surface areas”. When used to forecast the sea surface wind, wave height and water level, it can describe them very well. Contribution No. 4108 from the Institute of Oceanology, Chinese Academy of Sciences. This work supported by Stress Project (KZ952-S1-420), Chinese Academy of Sciences; 863 Project (863-818-06-05), and (863-818-Q-07)  相似文献   

ELECTROCHEMICAL CORROSION BEHAVIOR OF HOT DIP COATING IN ARTIFICIAL SEAWATER     

孙虎元  侯保荣  马士德  魏绪钧 《中国海洋湖沼学报》1999,17(2):181-186

INTR0DUCnONAlloycoatingscandetivelyproteCtsteelagainstcormsioninseri0uscormsionenvir-orunent,suchasthedrinesplashandtidalzones-TwoInainhodiptincaldrinumalloycOaingswidelyusedcommroiallyareGalfancoaing(contalningZn-5wt%kl-us)devel-oPedbytheIntemaionaltalZincReenhheZaionandhocoating(c0n-talningZn-55Wt%Al-1.6Wt%Si)develoPedbytheBethlehemSteelCorpOration-Anewrinc-basedalloycOaingdevel0PedbyNortheaStemUniversityisdiscussedinthesPaperbyelecthehendcalmethod.FromSun(l996),welmOWthecorms…  相似文献   

菏泽市土地利用存在的问题及潜力分析     

侯颖 《山东国土资源》2008,24(2):36

1土地利用特点 泽市土地总面积121.94万hm2,已利用土地115.28万hm2,土地利用率为94.54%,农用土地97.99万hm2,占土地总面积的80.36%,其中耕地83.30万hm2,占土地总面积的.68.26%,园地1.22万hm2,占土地总面积的1.00%,林地6.38万hm2,占土地总面积的5.22%;其他农用地7.24万hm2,占土地总面积的5.88%;建设用地18.93万hm2,占土地总面积的15.52%;未利用土地5.35万hm2,占土地总面积的4.12%.  相似文献   

Electro-connection marine corrosion test method and its application     

Hou Baorong 《中国海洋湖沼学报》1986,4(3):293-303

Corrosion of marine steel constructions may vary to a considerable extent owing to their different locations such as atmosphere, splash zone, tidal zone, immersion zone and mud zone^{[7, 8]}. A rather lengthy hanging steel sample is needed to test its corrosion resistance in various environments. But it is cumbersome to handle and not convenient for frequent observation and maintenance. So an indoor analogue test method is generally adopted for this purpose^[1]. This paper is a report of such a test. Contribution No. 1333 from the Institute of Oceanology, Academia Sinica.  相似文献   

Zonal displacement of western Pacific warm pool and zonal wind anomaly over the Pacific Ocean     

张启龙  张庆华  侯一筠  许建平  翁学传  程明华 《中国海洋湖沼学报》2007,25(3):277-285

The thermal condition anomaly of the western Pacific warm pool and its zonal displacement have very important influences on climate change in East Asia and even the whole world. However, the impact of the zonal wind anomaly over the Pacific Ocean on zonal displacement of the warm pool has not yet been analyzed based on long-term record. Therefore, it is important to study the zonal displacement of the warm pool and its response to the zonal wind anomaly over the equatorial Pacific Ocean. Based on the NCDC monthly averaged SST (sea surface temperature) data in 2°×2° grid in the Pacific Ocean from 1950 to 2000, and the NCEP/NCAR global monthly averaged 850 hPa zonal wind data from 1949 to 2000, the relationships between zonal displacements of the western Pacific warm pool and zonal wind anomalies over the tropical Pacific Ocean are analyzed in this paper. The results show that the zonal displacements are closely related to the zonal wind anomalies over the western, central and eastern equatorial Pacific Ocean. Composite analysis indicates that during ENSO events, the warm pool displacement was trigged by the zonal wind anomalies over the western equatorial Pacific Ocean in early stage and the process proceeded under the zonal wind anomalies over the central and eastern equatorial Pacific Ocean unless the wind direction changes. Therefore, in addition to the zonal wind anomaly over the western Pacific, the zonal wind anomalies over the central and eastern Pacific Ocean should be considered also in investigation the dynamical mechanisms of the zonal displacement of the warm pool.  相似文献   

基于GPU的数字影像的正射纠正技术的研究     

侯毅  沈彦男  王睿索  余宗超 《现代测绘》2009,32(3):10-11

本文简述了CUDA编程模型高性能并行计算的特性,在实现了基于GPU的数字影像正射纠正的基础上,阐述了基于GPU的加速技术在数字影像处理方面的应用情景.  相似文献