基于实时栅格法的多机器人协作建图

针对多机器人协作建立空间地图的问题,提出一种实时栅格法,通过控制机器人的编队,在探索环境的过程中,实时生成栅格地图,并标示出障碍的位置。机器人之间采用定向红外测距和无线通信技术保持多机器人的编队形态,同时划分栅格区域。用领导-跟随法和VHF+避障法控制编队绕过障碍。论证了该方法的基本原理及可行性,在InnoSTAR机器人平台上验证了该方法的有效性。该方法计算简单,占用存储空间小,可以使用简单廉价的传感器在小型机器人上实现,但必须要精确控制机器人编队的相对位置。     

Heat Roadmap Europe: Combining district heating with heat savings to decarbonise the EU energy system

Six different strategies have recently been proposed for the European Union (EU) energy system in the European Commission's report, Energy Roadmap 2050. The objective for these strategies is to identify how the EU can reach its target of an 80% reduction in annual greenhouse gas emissions in 2050 compared to 1990 levels. None of these scenarios involve the large-scale implementation of district heating, but instead they focus on the electrification of the heating sector (primarily using heat pumps) and/or the large-scale implementation of electricity and heat savings. In this paper, the potential for district heating in the EU between now and 2050 is identified, based on extensive and detailed mapping of the EU heat demand and various supply options. Subsequently, a new ‘district heating plus heat savings’ scenario is technically and economically assessed from an energy systems perspective. The results indicate that with district heating, the EU energy system will be able to achieve the same reductions in primary energy supply and carbon dioxide emissions as the existing alternatives proposed. However, with district heating these goals can be achieved at a lower cost, with heating and cooling costs reduced by approximately 15%.     

基于ARM的GPS数据接收系统的设计与实现

基于地质勘探与测绘对地理位置信息的需要,设计了基于ARM的GPS测量数据接收系统.从系统的硬件组成、前端的GPS数据采集原理、采集过程中使用的软硬件方法进行了简要的说明,ARM硬件资源丰富,运行速度快,非常适于在嵌入式系统中使用;使用的GPS集成度高,能够获取载波相位测量数据,为高精度测量结果的获得提供了必要条件.还使...     

Comparison of Northern Ireland radon maps based on indoor radon measurements and geology with maps derived by predictive modelling of airborne radiometric and ground permeability data

Publicly available information about radon potential in Northern Ireland is currently based on indoor radon results averaged over 1-km grid squares, an approach that does not take into account the geological origin of the radon. This study describes a spatially more accurate estimate of the radon potential of Northern Ireland using an integrated radon potential mapping method based on indoor radon measurements and geology that was originally developed for mapping radon potential in England and Wales. A refinement of this method was also investigated using linear regression analysis of a selection of relevant airborne and soil geochemical parameters from the Tellus Project. The most significant independent variables were found to be eU, a parameter derived from airborne gamma spectrometry measurements of radon decay products in the top layer of soil and exposed bedrock, and the permeability of the ground. The radon potential map generated from the Tellus data agrees in many respects with the map based on indoor radon data and geology but there are several areas where radon potential predicted from the airborne radiometric and permeability data is substantially lower. This under-prediction could be caused by the radon concentration being lower in the top 30 cm of the soil than at greater depth, because of the loss of radon from the surface rocks and soils to air.     

基于Microstation V8实现制图效果与GIS数据要求的统一

针对Microstation V8平台二次开发,阐述了以＂骨架线＋构造数据＂表现地形图点线面等元素的设计思路和方法,辅以图形要素关系间的处理手段,有效解决了制图效果与GIS数据要求的冲突,实现了＂一套数据、两种用途＂。     

城市测绘生产与档案信息综合管理平台的设计与实现

结合西安市勘察测绘院测绘生产与档案管理现状,基于B/S架构,采用MVC设计模式J、2EE框架、数据库、工作流等技术开发了运行在局域网内的院测绘生产与档案信息一体化综合管理平台。本文对该平台的总体架构、流程及功能设计、采用的关键技术及平台特点进行了详细阐述。本平台的应用大大减少了重复性劳动,提高了工作效率,改变了管理模式...     

基因组Mapping系统索引构建原理

基因组mapping是将由高通量测序技术产生的大量短read数据映射到人类参考基因组,对基因组表达量分析,SNP位点预测及疾病预测有重要意义。首先,介绍基因组mapping的研究背景和研究现状,介绍mapping系统中索引构建的基本概念和主要方法,并重点分析基于BWT结构的索引构建原理,同时也介绍序列比对的主要加速方法。最后,以总结BWT技术和mapping系统索引构建中涉及的相关方法和原理,揭示了新型索引技术的本质。     

城市信息化测绘体系及其关键技术研究

信息化测绘体系是"数字城市"的主要技术支撑之一,用于保障空间信息数据库有效运行与更新。本文结合福州市空间信息资源建设现状及其应用需求,提出了面向"数字城市"的信息化测绘体系架构,并就若干关键技术进行了分析,最后介绍有关应用实例,可供城市测绘的有关人员参考。     

城市肌理形态研究中的图示化方法及其意义

作为能够表达城市的物质空间的城市肌理形态是多学科共同的研究对象,运用图示对现实形态进行描述则是各学科共同的研究途径。然而,由于研究的问题不同导致了研究的视角和选用的尺度都存在很多差异,这些差异构成了多学科共同研究的屏障。本文从地理学、建筑学、社会学和环境科学领域中的城市形态研究出发,总结分析了图示语言在各学科运用中的共性方法,并对图示表述的差异作了澄清。进而,本文分别从线性、轮廓、色差和转译等四个方面总结了图示的表达及功用,详细解析了这些图示在研究城市空间容量(土地利用的经济性)、城市空间认知(城市的视觉环境)以及城市微气候控制等方面的意义,为建立跨学科城市中观形态研究的共用图示语言描述平台寻找可能的方向。     

基于OpenGL的视景仿真系统中纹理的应用

系统地介绍了OpenGL中纹理映射技术的概念、特点及工作流程,并结合实际视景仿真系统开发中的具体应用,深入剖析了纹理映射技术的应用方法和技术特点。采用OpenGL中的融合技术,大大地减少了编程工作量,提高了仿真图形的逼真度。