地质体的二维数值剖分

本文通过对５种最基本的地质模型的建立及对角度不整合模式的剖分,详细探讨了对三维地质体进行二维（剖面）数值剖分的算法,建立起地质体和油气储层从建模到量化全过程的工作方法和思路。     

Natural and human forcing in recent geomorphic change; case studies in the Rio de la Plata basin

An analysis of geomorphic system's response to change in human and natural drivers in some areas within the Río de la Plata basin is presented. The aim is to determine whether an acceleration of geomorphic processes has taken place in recent years and, if so, to what extent it is due to natural (climate) or human (land-use) drivers. Study areas of different size, socio-economic and geomorphic conditions have been selected: the Río de la Plata estuary and three sub-basins within its watershed. Sediment cores were extracted and dated (²¹⁰Pb) to determine sedimentation rates since the end of the 19th century. Rates were compared with time series on rainfall as well as human drivers such as population, GDP, livestock load, crop area, energy consumption or cement consumption, all of them related to human capacity to disturb land surface. Data on river discharge were also gathered. Results obtained indicate that sedimentation rates during the last century have remained essentially constant in a remote Andean basin, whereas they show important increases in the other two, particularly one located by the São Paulo metropolitan area. Rates in the estuary are somewhere in between. It appears that there is an intensification of denudation/sedimentation processes within the basin.Rainfall remained stable or varied very slightly during the period analysed and does not seem to explain increases of sedimentation rates observed. Human drivers, particularly those more directly related to capacity to disturb land surface (GDP, energy or cement consumption) show variations that suggest human forcing is a more likely explanation for the observed change in geomorphic processes. It appears that a marked increase in denudation, of a “technological” nature, is taking place in this basin and leading to an acceleration of sediment supply. This is coherent with similar increases observed in other regions.     

试论地勘单位的变革管理

本文阐述了新形势下面临复杂多变的地勘单位实施变革管理的重要性和必然性，并对其难度进行了分析．最后浅谈了几个重要的步骤。     

长沙市区岩土体工程地质特征

在收集大量勘察资料的基础上，结合勘察工程实践，对长沙市区岩土体地质特征及工程性能进行了系统地归纳总结，并提出了该地区岩土体主要物理力学性质指标经验值。     

基于GIS的金属矿山地质灾害预警系统研究与开发

综述了G IS应用于地质灾害研究方面的进展,认为目前在金属矿山地质灾害预警系统G IS技术方面的研究存在严重的不足,从而提出了金属矿山地质灾害预警系统研究的实施内容及方法。对一个基于G IS的地压灾害监测管理系统实例作了简单介绍。     

21世纪前期新疆油气资源开发战略探讨

根据我国油气资源面临的供需矛盾和新疆油气资源状况以及开发态势,认为新疆将成为我国陆上油气资源的战略接替区。进而依据此目标并针对目前开发中存在的问题,提出了21世纪前期新疆油气资源开发的战略对策：加强资源的勘探开发;实现开发领域的技术创新;积极拓展中亚市场,构建地下“油气大陆桥”;加强战略规划和管理;注重环境保护。     

三维地矿工程体视化技术

描述了体视化技术的主要过程。对地矿工程的两种数据，即离散的钻孔采样数据和连续的工程布置几何模型数据．分别通过插值处理和体素化处理形成三维规则体数据场。最后，通过对体视化的各种算法和地矿工程数据的特点进行了剖析，给出了一种改进的光线投射法，并结合某一铁矿山的情况进行了模型验证。     

创新理念，激活地热洁净能源勘查与开发

地热资源是本土绿色可再生能源。煤、石油、天然气化石类能源的日趋紧张和造成的环境污染将严重影响着经济社会的发展和人类的生存环境。为此，大力开发利用地热洁净资源具有重大意义。通过学习国务院《关于加强地质工作决定》，对我国地热资源勘查与开发浅谈了一些认识和建议，并认为只有创新理念，才能激活地热洁净能源的勘查与开发。     

大庆油田北三区西部井网加密的实践和认识

试验区PI 1-4油层属河流-三角洲相沉积,水淹严重且极不均匀,各沉积单元水淹状况与单元的油层发育、注采完善状况紧密相连。砂体发育决定了水淹厚度具有南北条带的一致性,并且西部水淹程度比东部高,油层纵向上呈多段水淹,高中水淹部位大部分集中在各沉积单元的底部。指出试验区内有6种剩余油分布,并总结出了井网加密后对水驱的认识,为进行三元复合驱试验奠定了基础。     

Organic Food: Buying More Safety or Just Peace of Mind? A Critical Review of the Literature

Consumer concern over the quality and safety of conventional food has intensified in recent years, and primarily drives the increasing demand for organically grown food, which is perceived as healthier and safer. Relevant scientific evidence, however, is scarce, while anecdotal reports abound. Although there is an urgent need for information related to health benefits and/or hazards of food products of both origins, generalized conclusions remain tentative in the absence of adequate comparative data. Organic fruits and vegetables can be expected to contain fewer agrochemical residues than conventionally grown alternatives; yet, the significance of this difference is questionable, inasmuch as actual levels of contamination in both types of food are generally well below acceptable limits. Also, some leafy, root, and tuber organic vegetables appear to have lower nitrate content compared with conventional ones, but whether or not dietary nitrate indeed constitutes a threat to human health is a matter of debate. On the other hand, no differences can be identified for environmental contaminants (e.g. cadmium and other heavy metals), which are likely to be present in food from both origins. With respect to other food hazards, such as endogenous plant toxins, biological pesticides and pathogenic microorganisms, available evidence is extremely limited preventing generalized statements. Also, results for mycotoxin contamination in cereal crops are variable and inconclusive; hence, no clear picture emerges. It is difficult, therefore, to weigh the risks, but what should be made clear is that 'organic' does not automatically equal 'safe.' Additional studies in this area of research are warranted. At our present state of knowledge, other factors rather than safety aspects seem to speak in favor of organic food.