判别分析法在农业旱情识别中的应用

在本文中,作者提出了利用数理统计学中的判别分析法,来进行农业旱情识别的方法,该方法从水文和气象对水量进行识别,以水文、气象和作物受旱三个方面综合起来对农业旱情进行识别。在邵阳市农业干旱研究中应用了判别分析法对当地的农业旱情进行了识别,识别结果与实际情况较为符合。该方法为农业旱情识别提供了一种新的途径。     

西北黄土地区地铁深基坑工程监测的关键技术

根据西北黄土地区第一条地铁——西安地铁近四年地铁基坑工程的监测经验,提出了基坑工程监测的主要内容、作用及其常用监测手段,介绍了轴力监测关键技术;测斜仪量测墙体位移关键技术;地裂缝段地表监测点布设的关键技术;盾构地表监测作用、监测项目、地层移动特征;监测报警注意事项。其中着重分析了黄土地区常用的内支撑形式——钢支撑监测的注意事项及常见异常测量数据的出现原因,提出温度对其测量结果的影响不可忽略。     

磁性源近区瞬变电磁法电阻率偏低的原因

探讨瞬变电磁法观测电阻率偏低或很大偏低于实际电阻率的原因。认为它是由供电期间供电回线与接收回线之间电场耦合产生的附加效应造成的,该效应产生的电势成为观测瞬变电势的强背景值;最后给出了减弱（或消除）这种电场干扰的方法与措施。     

萍乐坳陷西段早三叠世飞剑潭组的创建及地层层序研究

描述了创建剖面,划分了6地性段,并从沉积特征研究入手,确定了各种沉积相,微相及沉积体系,通过对小层序组划分,结合层序界面,首泛面和最大海泛面确定体系域和层序,在萍乐坳陷西段早三叠世飞剑组划分出4个正层序。     

Populism,localism and the geography of democracy

This short intervention argues that mainstream politicians are increasingly adopting localism as a framework for public policy. This is, in part, a product of popular, and populist, disillusionment with the nature and practice of mainstream politics. While it has the potential to transform the political geography of the UK, as yet, the localism agenda remains poorly researched. This intervention makes the case for geographers to engage in this work.     

Does the perception of climate change vary with the socio-demographic dimensions? A study on vulnerable populations in Bangladesh

Natural Hazards - This study tried to explore the perception of climate change by considering the socio-demographic dimensions of vulnerable populations in Bangladesh. This study included 158...     

长江中下游环境地质问题及对防洪工程的影响

今夏,长江继1954年后再次发生全流域特大洪灾。根据对长江中下游的水土流失、江湖淤积、地面沉降等环境地质所作的分析,日益严重的环境地质问题是洪灾加剧的重要原因,并对防洪工程产生不利影响。     

The influence of grinding on the dissolution kinetics of calcite

This study of the dissolution of calcite in an acid environment demonstrates a significant dissolution anomaly for small particles. This cannot be attributed to very small, finely ground particles “stuck” to the grains, as there were too few to explain the magnitude of the observed anomaly. It is linked to the disruption resulting from the grinding. When observed in the electron microscope, the grains appear to be constructed of an aggregate of small crystals oriented in several principal directions. Their size increases progressively from the surface to the interior of the grain. An exothermic reaction is produced when the calcite is heated to 350° C. This causes a change in the microcrystalline structure leading to a nearly monocrystalline state. This recrystallisation retards the dissolution speed.     

Water Scarcity and the Role of Groundwater in Salinization of the Don Avandelta

Doklady Earth Sciences - This paper reports on the seasonal changes in the regimes of mineralization in the Don delta. This study was based on the database of the automatic hydrometeorological...     

设立“地下明灯研究计划”的建议

20世纪末，空间对地观测技术的发展，获得了地球表面清晰的图像，使人们可以实时地观测地球水圈和大气圈的结构、状态和运动过程，及其与生物圈的相互作用，这是地球系统科学革命性的进展。介绍的“地下明灯研究计划”，其目标是获得地球内部不同深度情况下不同尺度的图像，这些图像是新型的地球内部“三维地图”，它将完善和改变我们对大陆动力学、岩石圈结构和状态的认识。     

地球物理科学计算可视化应用系统的开发

本文介绍了以Ｗｉｎｄｏｗｓ９５为ｉ平台进行开发的用于地球物理数据处理的应用系统,它为地球物理数据提供提供了一种新的手段。     

Micromechanically inspired investigation of cemented granular materials: part II— from experiments to modelling and back

Acta Geotechnica - This paper presents an experimental and analytical/numerical study of the mechanics of cemented granular materials (CGMs). This study incorporates both in situ X-ray tomography...     

Analysis and Estimation of Multi-unit Deposits: Application to a Porphyry Copper Deposit

This work concerns mineral deposits consisting of geological bodies whose metal grades have different characteristics in terms of distribution and variogram, which means that estimating grades by ordinary kriging may produce unrealistic spatial continuity. This paper proposes a method based on the indicators of the geological objects (hereafter called units) and their product with the metal grade. This is illustrated by an application to a porphyry copper deposit. The aim of this paper is essentially to promote the use of variogram ratios to analyze and characterize deposits.     

地质灾害监测数据集成系统设计及实现

多源监测数据的自动汇聚和分析是实现地质灾害监测预警的重要基础。针对目前监测数据在集成过程中遇到的问题和困难,同时为了实现地质灾害监测工作的自动化,本文结合项目实际需求,开发了一套地质灾害监测数据集成系统。该系统集成了监测数据入库标准、异常数据处理技术等,并将先进的存储理念引入地质灾害监测工作中,借助于系统服务（System Service）的思想,实现了监测数据的自动化处理并实时汇聚入库,在监测数据平台上无缝集成各种监测数据,达到了地质灾害监测自动化的目的。     

Growth-strata geometry in fault-propagation folds: a case study from the Gafsa basin, southern Tunisian Atlas

The structural and sedimentological study of fault-propagation folds in Southern Tunisia highlights a special geometry of the growth strata (strata deposited simultaneously with the formation or growth of a fold). This distinct geometry is visible in the uppermost growth-strata beds and consists of one flank with unconformity as opposed to the other flank with perfect conformity. This geometry can be explained by the mechanism of fault-propagation folding, with asymmetrical flank dips and hinge migration kinematics. This kinematics was originally predicted by the fault-propagation fold model, which facilitates the study of this special geometry in a narrow domain of sedimentation-to-shortening ratios. A plot projection provides a generalisation of the results of all types of fault-propagation folds by revealing the expected geometry of the growth strata. This study constitutes one of the most complete examples of kinematic model validation on a field scale.     

内蒙古平庄盆地早白垩世植物群性质及特征

内蒙古平庄煤田是我国东北部主要含煤盆地之一,盆地内植物化石丰富,本文报道了平庄盆地含煤地层的植物化石25属38种,对其性质、特征及分布进行了讨论,对平庄植物群的苏铁类、银杏类和松柏类做了角质层研究。该植物群主要由真蕨类、苏铁类、茨康叶类、银杏类和松柏类组成,即没有侏罗纪古老残存分子,也没有出现被子植物,以松柏类、银杏类最为丰富,而苏铁类、本内苏铁类极度贫乏。该植物群与中国东北早白垩世含煤沉积及相关地层中的植物组合可比较,与西伯利亚、北美、日本早白垩世植物群亦十分接近。根据植物群的性质和特征及结合相关地层中的植物群进行了对比,认为平庄含煤盆地植物群的时代为早白垩世早期,当时该区可能地处北半球的暖温带,该项研究对恢复该区的古地理,古气候,古环境及成煤规律提供了可靠的有关古生物学依据。     

电信网络两类逻辑图自动生成算法

为解决电信手工绘制的逻辑图不易维护的问题,研究了电信带方向逻辑图和不带方向逻辑图的自动生成算法.算法是从数据库提取缆线的路由信息,用深度优先的方式遍历缆线经过的所有坐标,采取回溯的方式,计算缆线在每个点的偏移值,调整缆线顺序,自动绘制逻辑图.产生的逻辑图没有不必要的交叉,避免了传统的手工绘制.结果表明,对于常用的电信逻辑图,自动生成算法是可以满足要求的.      

扩展传统的岩石锚固技术

主要介绍了膨胀锚杆的锚固性能。这种锚杆不仅可以用于硬岩，而且还可以在不适合其它锚杆的条件下加以应用。     

Identification of network cities in South Africa

GeoJournal - Settlements, cities and regions function as integrated systems. This resulted in the creation of functional connections and when linked, networks within which trade occurred. This...     

地质实验室绘制标准曲线的数学模拟法

本文讨论了一种新的绘制标准曲线方法——数学模拟法。该方法不仅具有作图法的度和实验意义,而且还有线性回归法的数学意义。