基于参照点的任意区域检测方法

区域检测，即判定当前点是否位于某个已知的区域之内，这是电子地图处理和计算机图形学以及目标定位中经常遇到的问题。对于任意区域的检测目前尚无很满意的方法，文中给出的基于参照点的检测方法，思路清晰、实现简便，且适用3维空间任意区域的检测。     

基于改进能力谱方法的位移反应估计

本文阐述了Pushover分析中改进能力谱方法的概念和实施步骤；对不同场地条件下四个中、低层框架结构采用改进能力谱方法估计的目标位移和非线性时程反应分析结果进行了比较，分析，并提供了不同场地条件下两种方法的相对误差，为该方法的实际应用提供了一些参考依据。     

Discovery of the Paleo-Tethys residual peridotites along the Anyemaqen–KunLun suture zone (North Tibet)

The spinel peridotite from the Anyemaqen suture contains ?5% residual clinopyroxene and is characterized by a high abundance of the magmaphile elements Fe, Al and Ti in the primary mineral phases. Our data demonstrate that this rock represents residual mantle material, which has been affected by less than 10% partial melting prior to its emplacement. Its textural features indicate that the rock has been plastically deformed in a non-coaxial regime under lithospheric physical conditions at a relatively cool thermal regime below solidus temperature. We suggest that the peridotites from the Anyemaqen suture represent mantle material, which was either emplaced during incipient rifting on the Palaeozoic passive margin of Asia, or uplifted at slow spreading ridge setting in Paleo-Tethyan Ocean. Further researches are needed to make a definite choice between these two alternatives. To cite this article: E.A. Konstantinovskaia et al., C. R. Geoscience 335 (2003).     

The seismic energy of Yaoan earthquake sequence estimated by peak velocity

For a long time, a quantitative calculation of energy radiated by seismic waves has been an important problem in the basic study of seismology. Up to now the well-known relationship of lgE=l.5MS+11.8 created by Gutenberg and Richter (1956) has still been a better experiential statistical relation for estimating the energy of seismic waves. Since the creation of seismic dislocation model in the 1960s, seismologists have studied a quantitative calculation of energy radiated by seismic waves. F…     

广西姑婆山岩体侵位构造及侵位机制研究

本文从环形构造和线性构造特征、侵位断裂—岩墙、岩脉、定向构造和挤压变形构造、外接触带的褶皱构造、岩体的应变测量等方面,系统地对姑婆山花岗岩的侵位构造进行了研究,并得出了该岩体属“气球膨胀”的侵位机制。     

Volcanisme de l'ı̂le aux Pingouins,archipel Crozet,témoin de l'hétérogénéité du manteau fertile au sud de l'océan IndienPenguins Island,Crozet archipelago,volcanic evidence for a heterogeneous mantle in the southern Indian Ocean

Despite its small area (5.6 km²), the Penguins Island brings magmatic information concerning mantle geochemical heterogeneities in southwestern Indian Ocean. The volcanism that built the island was firstly associated with marine deposits, and secondly with aerial, giving then abundant volcanic breccias and lava flows. The rocks are weakly differentiated and result of magmatic fractionation from picritic to tephritic types. KAr ages are near 1.1 Ma. The magmatic source may be related to a HIMU reservoir or to EMI ± EMII ones, depending on the geochemical evidences that are taken into account. However, comparisons with the Marion Island, on the same oceanic plateau and far to the west, as well as with Kerguelen Islands, far to the east, suggest a very heterogeneous mantle source. To cite this article: A. Giret et al., C. R. Geoscience 334 (2002) 481–488.     

ZC油田活性剂驱效果评价研究

通过实验物理模拟，确定HABS磺酸盐型阴离子表面活性剂作为化学驱三次采油的驱油剂，在ZC油田进行了为期一年的矿场先导性试验并做出效果评价，确证HABS表面活性剂驱在ZC油田起到了稳油控水、增产挖潜的作用，有明显的经济效益。     

Deep－Source Ore－Forming Materials and Prospecting of Gold Deposits in Eastern Hebei,China

Eastern Hebei Province is one of the important gold mineralization areas in North China,and detailed investigations have been made in this area.Different mineralization models and different ore-formng surces have been proposed for the gold deposits in this area.As more detailed work was made and more information has been accumulated,it is necessary to make a new investigation on gold metallogenesis and its source.This paper presents the data about 13 gold deposits(occurrences.)It is concluded that the element gold came from the deep mantle.Different models of metallogenesis substantially describe such processes that ore-forming fluids were involved in metallogenesis in different favorable loci.Gold ore prospecting should be focused on fluid channel ways and favorable structures.     

Sustaining productive ecosystems in face of risk

Ecosystems lacking human induced energy input from outside are in danger to degrade if man requires any sustainable yield. The risk of failure strongly depends on the amount of exploitation. This is shown by a simple one dimensional analytical feed-back model. Natural fluctuations determine the degradation probability of productive ecosystems. The stability behaviour of the latter is demonstrated by an analytical model in the two dimensional phase space. Full quantitative evaluation of the risk needs simulation experiments. One is carried out in the thorn shrub savannah rangelands at a site in Namibia where a fully calibrated simulation model shows that the less a sustainable yield is required, the more the breakdown is delayed. In this case of highly fluctuating rainfall any sustainability sensu strictu does not exist. This revised version was published online in August 2006 with corrections to the Cover Date.     

La vague de chaleur de l'été 2003 et sa prévision saisonnière

The main features of the heat wave that has affected western Europe during the summer 2003 are first recalled, with particular concern to analogies and differences with previous warm-summer episodes. The skills of the various operational and pre-operational seasonal forecasting models in use at that time are evaluated. None of them has been able to consistently forecast the heat wave three month in advance. The meteorological and climatic situation prevailing during spring 2003 is then analysed. A strong sea-surface-temperature (SST) anomaly is found to have developed over North Atlantic a few months before the heat wave. The particular mechanism at work to explain the occurrence of the heat wave is not a ‘simple downwind influence’ of the SST anomaly. It very likely involves complex ocean–atmosphere interaction phenomena of a kind that is not properly taken into account in today's seasonal forecasting models. To cite this article: J.-C. André et al., C. R. Geoscience 336 (2004).