浓集值在矿床预测中的应用

有用物质可否成为矿床,取决于某元素含量与最低工业品位的比值。使用浓集值可以预测和判定找矿矿种一成矿元素,发现新的矿产地。     

龙门县寒冷天气统计特征及其对人体舒适度的影响

根据龙门县1962—2012年逐日气象资料,采用线性回归、滑动平均、人体舒适度指数等方法,研究了龙门县寒冷天气统计特征及其对人体舒适度的影响。结果表明,近50年来龙门寒冷天气日数呈不显著减少趋势,减少速率每10年1.9 d,但近10年寒冷天气日数呈增加趋势。寒冷天气主要出现在12—2月,占全年的86.8%。寒冷天气可分阴冷寡照型、晴空辐射型、冷空气来袭型3种类型。部分橙色寒冷天气虽然早晚气温较低,人体感觉寒冷,但中午气温较高,人体感觉舒适;而黄色寒冷天气若为阴雨寡照型时,全天气温较低,人体感觉寒冷。     

突发性灾害事件应急服务策略

总结2011年4月17日气象应急服务过程的经验教训,分析了受灾人群的特点,从灾害预警的发布手段着手,探讨完善气象应急服务策略的方法及可行性,为更有效地做好气象应急服务提供参考。     

基于企业级地理信息系统服务平台的气象信息检索平台的设计与实现

为了改变气象信息服务方式,根据气象信息的特点,结合气象信息检索平台的要求,利用企业级地理信息系统服务平台技术,借助于J2EE开发平台和Flex技术,提出了基于B／S架构实现气象信息检索平台的构想,设计了系统的基本框架,功能和数据库,并且对其中的一些关键技术进行了详细介绍,如企业级地理信息系统服务平台的体系结构以及平台所用到的ESRI公司为应用开发者提供的框架flexview的整体结构,初始化过程等,最后根据设计原则对本气象信息检索平台进行了实现。     

HEATING DEGREE DAY RESEARCH IN ALBERTA: RESIDENTS CONSERVE NATURAL GAS

A high correlation exists between monthly population-weighted heating degree days (below 18C) and the use of natural gas per household for residential heating in Alberta for the period 1962–80. The use of natural gas for residential heating per household declines since 1973 following a sharp increase in gas prices.     

海洋航空遥感多传感器应用系统集成

面向对象的程序设计思想和可视化编程技术使新技术的应用与推广变得越来越简单,在测绘和遥感等领域也已产生了前所未有的影响。在国家863计划项目航空遥感多传感器集成与应用技术系统(IAMSMA)的开发过程中,针对数据来源于多种传感器,充分利用数字图像处理的方法,采用模块化设计,将各传感器获取的数据与信息处理模块封装于统一的界面下,最终实现应用系统的集成。     

青海贵德地区DR1地热井井旁涌水原因分析 及处理工艺应用研究

地热资源属于清洁能源,主要通过地热井方式进行开发利用,成井工艺质量决定地热资源开发利用。贵德盆地DR1地热井由于成井时间较长,出现井旁涌水事故。本文详细分析了井旁涌水原因,采用合理方式成功处理涌水事故。为类似地热工程提供借鉴。     

Engineering geomorphology: A novel professional profile to face applied challenges in earth surface dynamics in mid-Europe

Engineering geomorphology is concerned with the assessment of surface processes, sediment dynamics, landform changes and geomorphological hazards, which are related to civil engineering and construction. As an important planning component, it contributes significantly to the solution of societal problems on a dynamic earth surface. Unlike in the UK and other countries where it has become an independent sector within geotechnical engineering, the discipline has found little attention up to now in mid-European applied geosciences. This ESEX commentary discusses the under-representation and proposes an advancement of professional engineering geomorphology within the German-speaking countries. The relation to neighbouring disciplines and the history of the field are illustrated from the academic and practical perspectives. A brief outline of potential fields of activity, recent professional practice and requirements for academic training are presented to provide aspiring practitioners with an idea of their future prospects as engineering geomorphologists. As part of their qualification, teamwork with geologists and engineers must be considered a key aspect, involving mutual knowledge of methods, techniques and interfaces for the propagation of uncertainty. The discussion demonstrates ways engineering geomorphology could be implemented as an established profession/academic discipline in mid-Europe as part of physical geography, geosciences and neighbouring engineering disciplines.     

Ancient charcoal as a natural archive for paleofire regime and vegetation change in the Mayumbe,Democratic Republic of the Congo

Charcoal was sampled in four soil profiles at the Mayumbe forest boundary (DRC). Five fire events were recorded and 44 charcoal types were identified. One stratified profile yielded charcoal assemblages around 530 cal yr BP and > 43.5 cal ka BP in age. The oldest assemblage precedes the period of recorded anthropogenic burning, illustrating occasional long-term absence of fire but also natural wildfire occurrences within tropical rainforest. No other charcoal assemblages older than 2500 cal yr BP were recorded, perhaps due to bioturbation and colluvial reworking. The recorded paleofires were possibly associated with short-lived climate anomalies. Progressively dry climatic conditions since ca. 4000 cal yr BP onward did not promote paleofire occurrence until increasing seasonality affected vegetation at the end of the third millennium BP, as illustrated by a fire occurring in mature rainforest that persisted until around 2050 cal yr BP. During a drought episode coinciding with the ‘Medieval Climate Anomaly’, mature rainforest was locally replaced by woodland savanna. Charcoal remains from pioneer forest indicate that fire hampered forest regeneration after climatic drought episodes. The presence of pottery shards and oil-palm endocarps associated with two relatively recent paleofires suggests that the effects of climate variability were amplified by human activities.