Surface wave propagation in a transversely isotropic elastic layer overlying a liquid saturated porous solid half-space and lying under the uniform layer of liquid     

M. D. Sharma  Rajneesh Kumar  M. L. Gogna 《Pure and Applied Geophysics》1990,133(3):523-539

Dispersion of Rayleigh-type surface wave is studied in a homogeneous transversely isotropic elastic layer overlying a nondissipative liquid-saturated porous solid half-space and lying under a uniform layer of homogeneous liquid. The frequency equation in the form of ninth-order determinant is obtained.Special cases have been deduced by reducing the depth of the layers to zero and by changing the transverse isotropic layer to an isotropic layer. Dispersion curves for the phase velocity have been plotted for a particular model.  相似文献   

区域化探异常研究方法探讨   总被引：1，自引：0，他引：1  

李武俊  唐开金 《陕西地质》1991,(1)

本文对区域化探异常图示、异常评序、可能成矿元素、综合解释及成矿预测等方面进行了探索性研究,这对异常深入的剖析研究,确定异常检查范围及成矿预测都十分有益。数据处理系统是在无 X—Y 绘图仪的 PC 微机上实现数据处理、成图及各类处理分析的程序软件。  相似文献   

中国西部三维速度结构及其各向异性   总被引：24，自引：5，他引：24  

宋仲和  庄真 《地球物理学报》1991,34(6):694-707

本文用覆盖中国的358条勒夫面波路径资料,研究了10.45-113.80s范围内中国西部的三维SH波速度结构.结果表明,各构造单元的SH波速度结构均有明显的差别.作为稳定块体的塔里木盆地,壳内重力分异程度较高,上、中、下地壳厚度差别小,壳内无明显的低速层,地壳平均速度比较小;上地幔低速层埋深大且层中速度大;区内横向变化小.构造活动区如天山、青藏高原,其突出的特征是下地壳厚度大且速度大,上地幔盖层速度值相当高.这与西伯利亚、印支板块的挤压有密切的关系.青藏高原东部及其北、东边缘地区壳内存在低速层,上地幔低速层埋深浅,一些地区存在壳幔过渡层.面波各向异性研究表明,青藏高原、天山及印支板块北缘下存在明显的各向异性,以构造边缘地区及上地幔低速层附近最为突出.印度板块、西伯利亚板块与中国大陆间的碰撞引起强大的水平压力和一定的下插作用,是造成青藏高原隆起、地壳增厚、天山隆起的最根本的因素,同时也促成壳幔中辉石、橄榄石的定向排列和物质运移,因而出现明显的各向异性现象.  相似文献   

1989年中日青藏高原冰川联合考察研究   总被引：3，自引：1，他引：3  

姚檀栋  上田丰 《冰川冻土》1991,13(1):1-8

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Grid dispersion in generating finite-differences synthetic seismograms     

Abdolrahim Javaherian 《地震学报(英文版)》1994,7(3):397-407

Ｇｒｉｄｄｉｓｐｅｒｓｉｏｎｉｎｇｅｎｅｒａｔｉｎｇｆｉｎｉｔｅ－ｄｉｆｆｅｒｅｎｃｅｓｓｙｎｔｈｅｔｉｃｓｅｉｓｍｏｇｒａｍｓＡｂｄｏｌｒａｈｉｍＪａｖａｈｅｒｉａｎ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ｔｈｅＵｎｉｖｅｒｓｉｔｙｏｆＴｅｈ...  相似文献   

参考大气在中期天气预报和气候模拟中的应用     

陈嘉滨  舒静君 《大气科学》1994,18(6):660-673

本文概述了根据应用参考大气概念提出的参考大气谱模式计算格式（或称静力扣除法）在国内外一些气象机构的中期天气预报、后处理和四维同化、以及气候模拟中的应用。计算表明，这种参考大气谱模式计算格式，能有效的减少截谱误差，明显地改进中期天气预报和气候模拟。  相似文献   

沙漠地区春季的大气浑浊度及沙尘大气对地面辐射平衡的影响   总被引：10，自引：8，他引：10  

沈志宝  文军 《高原气象》1994,13(3):330-338

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TROPICAL ATMOSPHERIC NONLINEAR STEADY RESPONSE SOLUTION UNDER EFFECTS OF PAIRED HEAT SOURCES OF CONTRASTING NATURE          下载免费PDF全文

周学龙  孙照渤 《Acta Meteorologica Sinica》1994,(3)

Based on steady semi-geostrophic model equations,analysis is carried out of the linear and nonlinearmodification/response of the tropical atmosphere to the forcing of ideal paired heat sources of contrasting nature.Re-suits show that the linear part is dominant in the steady response but the nonlinear modification is quite noticable in theneighborhood of the heat source and between the paired sources,and the barotropic mode and second baroclinic modeplay a different role in the modification,with the barotropic(second baroclinic)mode modification depending largely onthe Rossby wave self-interaction(the magnitude due to the Kelvin-Rossby wave interaction)between the pairedsources.  相似文献   

氯化钠－溴水封闭溶样碘量法测定矿石中的金   总被引：2，自引：0，他引：2  

薛光 《岩矿测试》1994,(2)

采用ＮａＣｌ－溴水为溶剂、封闭溶样法分解试样，泡塑抽滤吸附以及碘量法测定矿石中Ａｕ。方法简单快速、准确、不污染环境，适用于测定矿石中０．ｘ～ｘｘｇ／ｔ的Ａｕ。  相似文献   

TROPICAL ATMOSPHERIC NONLINEAR STEADY RESPONSE SOLUTION UNDER EFFECTS OF PAIRED HEAT SOURCES OF CONTRASTING NATURE^*          下载免费PDF全文

Zhou Xuelong  Sun Zhaobo 《Acta Meteorologica Sinica》1994,8(3):356-364

Based on steady semi-geostrophic model equations,analysis is carried out of the linear and nonlinear modification/response of the tropical atmosphere to the forcing of ideal paired heat sources of contrasting nature.Resuits show that the linear part is dominant in the steady response but the nonlinear modification is quite noticable in the neighborhood of the heat source and between the paired sources,and the barotropic mode and second baroclinic mode play a different role in the modification,with the barotropic(second baroclinic)mode modification depending largely on the Rossby wave self-interaction(the magnitude due to the Kelvin-Rossby wave interaction)between the paired sources.  相似文献