一个微震群会误判为一次爆炸吗？     

Leona.  G 朱玉新 《地震科技情报》1996,(4):3-3

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加拿大地产结构信息系统的设计     

Camp.  G 周琪 《测绘译丛》1992,(2):47-48,F003,F004

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Some experiments with multivariate objective analysis scheme of heights and winds using optimum interpolation     

S. K. Sinh  S. G. Narkhedkar  D. R. Talwalkar  S. Rajamani 《大气科学进展》1992,9(4):431-440

A two-dimensional, multitvariate objective analysis scheme for simultaneous analysis of geopotential height and wind fields has been developed over Indian and adjoining region for use in numerical weather prediction. The height-height correlations calculated using daily data of four July months (1976-1979), are used to derive the other autocorrelations and cross-correlations assuming geostropic relationship. A Gaussian function is used to model the autocorrelation function. Since the scheme is multivariate the regression coefficients (weights) are matrix.Near the equator, the geostrophic approximation relating mass and wind is decoupled in a way similar to Bergman (1979). The objective analyses were made over Indian and adjoining region for 850, 700, 500, 300 and 200 hPa levels for the period from 4 July to 8 July 1979, 12 GMT. The analyses obtained using multivariate optimum in-terpolation scheme depict the synoptic situations satisfactorily. The analyses were also compared with the FGGE ana-lyses (from ECMWF) and also with the station observations by computing the root mean square (RMS) errors and the RMS errors are comparable with those obtained in other similar studies.  相似文献   

EVALUATION OF MODELS FOR ESTIMATION OF NET RADIATION FOR ALPINE SLOPING SURFACES          下载免费PDF全文

Huo Zonghui  W. G. Bailey 《Acta Meteorologica Sinica》1992,6(2):189-197

This paper describes and tests two models for estimating net radiation(or the radiation balance)on sloping surfacesof alpine environments.They are an empirical method based on the linear relationship between net radiation and globalsolar radiation and a flux-by-flux method involving the estimation of all the individual components of radiation budgetindependently.The results show that the empirical method is capable of predicting hourly net radiation on sloping sur-faces to within about±53 W m~(-2) under all sky conditions.During clear sky conditions,it could predict net radiation onslopes to within±58 W m~(-2) or 16% of the measured values.The flux-by-flux method,although it did not perform aswell as the empirical method,performed adequately and could give estimates of net radiation on slopes with root meansquare error of less than 74 W m~(-2)(20%)and a mean bias error of 27 W m~(-2)(7%).  相似文献   

MULTIVARIATE ANALYSIS OF 2D SURFACES:FOLDING AND INTERPRETATION     

BJRN K.ALSBERG  BJRN G.REMSETH 《地理学报(英文版)》1992,(3)

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澳大利亚特里托里(TERRITORY)北部ARLTUNGE金矿区含金石英脉分布的构造控制     

PaulH.G.M.Dirks  陈硕彦 《西北地质》1992,(2)

1 绪言在几个世代的石英脉及与其共生的矿化建造中,渐进的脆性—韧性剪切带通常显示一种特有的型式。一组早期的贫金石英脉在剪切带内通常呈雁行状展布。这些石英脉随渐进的形变作用而变形,且被膨胀的石英脉穿切,这种膨胀脉是在剪切事件发生期间较晚期形成的,当时大多数的位移已形成于特有的狭窄裂隙带内。尽管人们通常能够识别上述矿化类型,但却未很好了解其成因和形态约束。本文涉及澳大利亚中部若干后生脉状金矿床,这些矿床是代表从韧性发展到脆性一韧性剪切带中矿化的极好实例。设想通过详细的岩性和构造形态地  相似文献   

预测尚未发现的油气田总数及其资源量：以弗里奥滨海...     

Schu.  JH 龚建明 《地质科学译丛》1992,9(2):57-63

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高山流域分布水文系统的研究—以意大利北部Ampezzan Dolomites Upper Boite     

G.B.Engelen  梁杏 《地质科学译丛》1992,9(1):68-72

文章介绍在北意大利Ampezzan Dolomites的Upper Boite河的高山流域在山区水文学方面进行分布水文系统研究（Engelen和Vrnneker,1988,见本卷）的实例。文章对这个面积约200km^2、高程1800-3000m的范围作了概要的结论性分析。Upeer Booite流域的水文特征主要受较高部位的大片裸露的或植被稀少的白云岩和岩溶化的石灰岩分布区的控制。本区春及初夏形成融雪的洪水，由春到夏持续产生基流，夏秋的暴雨产生洪流，并在低处形成泥石流。较低区域（标高在1800－2000m以下）蒸散强烈而在水文上不敏感，只有在某些渗透性相当差的火山凝灰岩与泥灰岩坍塌出露区，随夏季洪流才产生大量悬浮物质。  相似文献   

用断裂力学模型对地震前兆进行分类     

I.G.Main邱泽华  张宝红 《地壳构造与地壳应力》1992,(2):48-55

目前在地震前兆的观测方面，普遍趋向于将最突出的地震前兆根据可能有的预警时间归类于一种地震发生的模型．例如，Rikitakc(1987)最近收集了418个日本的地震前兆异常，并按照前兆时间作了分类．虽然在可靠性和统计意义上变动很大，但是这种经验观测至少可以分出4种截然不同的类型，  相似文献   

地磁场的变化     

Tarli.  G 陈会鑫 《国外地质与勘测》1992,(1):F003-F004

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