基于模板的六角格兵棋地图可视化设计研究     

汤奋  武志强  张欣  李坤伟  张寅宝 《测绘工程》2016,25(4):55-59

兵棋地图是兵棋的重要组成部分,是战场环境信息的载体,是兵棋推演者认知战场环境的工具。在介绍兵棋地图概念和作用的基础上,阐明兵棋地图可视化设计的重要性,总结目前兵棋地图可视化设计存在的问题和不足。以提高兵棋地图可视化设计效率和改进其可视化表达效果为目的,将地图模板技术运用到兵棋地图可视化设计中,分析兵棋地图可视化模板设计的影响因素,构建兵棋地图可视化模板库,并对其实现机制进行研究,最后给出应用实例,证明效果良好。  相似文献   

多源数据协同定量遥感产品生产系统的领域模型     

张正  唐娉  李宏益  冯峥 《遥感学报》2016,20(2):184-196

大数据技术中的一个难点是如何统筹多源异构的数据。在多源数据协同定量遥感产品生产系统中,不同传感器数据的协同使用为生产系统的各个环节都带来了许多的问题,例如异构数据文件的统一表示和调度,繁杂生产流程的统一抽象等。领域驱动设计是一种应对软件核心复杂性的设计方式。领域驱动是指在设计过程中经过不断的迭代,逐渐提炼出一套灵活优雅的领域模型。领域模型专注于分析问题领域本身,发掘重要的业务领域概念,并建立业务领域概念之间的关系。本文在不断实践的基础上提出了一组较成熟的领域模型,该模型用一种统一的方式解决了多源数据协同生产系统中各方面的问题,并显著地降低了系统集成的难度和工作量,且为新数据源的加入预留了灵活性。  相似文献   

From taxonomies to ontologies: formalizing generalization knowledge for on-demand mapping     

Nicholas Gould  William Mackaness 《制图学和地理信息科学》2016,43(3):208-222

Automation of the cartographic design process is central to the delivery of bespoke maps via the web. In this paper, ontological modeling is used to explicitly represent and articulate the knowledge used in this decision-making process. A use case focuses on the visualization of road traffic accident data as a way of illustrating how ontologies provide a framework by which salient and contextual information can be integrated in a meaningful manner. Such systems are in anticipation of web-based services in which the user knows what they need, but do not have the cartographic ability to get what they want.  相似文献   

Computer-aided design of bus route maps     

Yukio Sadahiro  Takahito Tanabe  Maxime Pierre  Koichi Fujii 《制图学和地理信息科学》2016,43(4):361-376

The bus route map is a diagram that aims to convey necessary information for map readers to find an appropriate way of moving from an origin to a destination. Design of bus route map is a complicated and time-consuming task that requires careful consideration of readability and aesthetics. This paper proposes a new computational method for designing bus route maps. The method helps us to reduce six types of undesirable elements in bus route maps, i.e., gap, shift, crossing, overlap, misalignment, and acute bend. The method consists of two phases: line layout phase determines the relative order of bus routes on each road segment and map layout phase calculates the actual position of bus routes drawn on a map. This paper applies the method to the design of bus route maps of Chiba City, Japan. The result supports the effectiveness of the method as well as reveals open topics for future research.  相似文献   

受控定向钻进技术在福建马坑矿区的应用          下载免费PDF全文

邹道全 《探矿工程》2016,43(1):70-74,80

重点介绍了福建马坑矿区ZK8321分支孔受控定向钻进技术。施工中运用了国内先进的螺杆钻造斜技术及光纤陀螺测量定向技术,避开上部复杂孔段（松散破碎层、溶洞地层、采空区等）及对勘探工作的影响,达到了施工目的;总结了施工技术难点与措施,分析了施工技术效果,积累了宝贵的施工经验。  相似文献   

Improved assessments of wave-induced fatigue for free spanning pipelines     

《Applied Ocean Research》2016

For subsea pipeline projects, the costs related to seabed correction and free span intervention are often considerable. Development of reliable methods for fatigue analyses of pipelines in free spans contributes to minimize costs without compromising pipeline integrity. Assessment of wave-induced fatigue damage on multi-span pipelines is investigated, and improved analysis methods are suggested in this paper. A time-domain (TD) algorithm is developed, which accounts for non-linear hydrodynamic loading and dynamic interaction between adjacent spans. The proposed TD approach is employed to evaluate linearized frequency-domain (FD) solutions from recognized design standards and to study the dynamic response of multi-span pipelines to direct wave loading. Differences between multi- and single-span analyses are described for the first time, and the common assumption that the main fatigue damage contribution comes from the fundamental mode is demonstrated not to hold for multi-spans. An improved FD solution capable of predicting multi-mode response is derived and demonstrated to give accurate fatigue life estimates for multi-span pipelines.  相似文献   

Compression limit state of HVAC submarine cables     

《Applied Ocean Research》2016

An industry accepted standard does not currently exist for determination of compression limits in a subsea cable. This has resulted in most manufacturers specifying that subsea cables are not permitted to be axially loaded in compression.Additionally industry guidance does not exist regarding the consequences of inducing compression forces within subsea cables and the resulting effect on cable integrity. Industry recommended practice and guidance also does not have any information regarding experimental test arrangements to determine allowable compression levels within a subsea cable. This lack of modelling/testing guidance along with manufacturer recommendations of zero compressive loads within subsea cables results in overly conservative and restrictive design parameters for subsea cable installation and use.Due to the complex interaction within a subsea cable structure, such as contact interaction and friction between cable strands, theoretical modelling has been unable to provide reliable stress predictions and therefore an experimental testing regime is required if compression limits within the cable are to be appropriately determined. This paper describes combined axial and bending test arrangements that can be used as a guideline for determination of allowable compression limits for subsea cables.  相似文献   

基于灵敏度分析的海洋油气资源BP神经网络预测模型的优化   总被引：2，自引：2，他引：0  

赵健  刘展 《海洋科学》2016,40(5):103-108

作者针对BP神经网络结构设计中存在的问题,提出利用灵敏度分析方法对BP神经网络预测模型进行优化。通过BP算法与参数灵敏度分析的结合,寻找网络输入属性与输出属性之间的影响因子;在保证精度的前提下优选网络输入属性,简化网络结构,以增强网络的泛化能力,减少人为主观因素对网络设计的影响。最后以海洋油气资源预测为例,结合实测资料建立BP神经网络预测模型并进行了优化及预测精度评价,表明优化后的模型既能有效提高油气资源预测结果的稳定性,又不损失预测精度。  相似文献   

Measuring Urban Streetscapes for Livability: A Review of Approaches   总被引：1，自引：0，他引：1  

Chester Harvey  Lisa Aultman-Hall 《The Professional geographer》2016,68(1):149-158

Increasing interest in urban livability demands that geographers and planners more precisely define what constitutes a livable streetscape, a fundamental building block of urban places. Widespread examination of streetscape livability will require precise and efficient measurements of (1) physical characteristics at the spatial scale of individual streetscapes and (2) indicators of experiential quality based on revealed behavior or stated preference. This article reviews approaches to collecting both types of measurements, showing that innovative methods using geographic information systems (GIS), Internet-enabled surveys, and even social media could be useful complements to traditional qualitative methods for collecting streetscape measurements.  相似文献   

土地集约利用数据库实时更新系统的研制          下载免费PDF全文

张翠英  余学祥  赵兴旺 《山东国土资源》2016,32(6)

针对PDA产品信息采集不全、屏幕小不易图形编辑、维护保管难及数据库更新不及时等问题,文章将更新数据的编辑、审核和更新入库功能移至服务器端。在系统结构设计、数据库设计以及功能设计等基础上,利用组件式GIS开发、空间数据拓扑分析、软件系统集成、地理建模等先进技术,对土地集约利用数据库实时更新系统进行开发,实现了土地集约利用评价数据库采集和更新内外业一体化,进而实现与"土地集约利用终端系统"的完美对接,为土地集约利用评价系统提供了实时、准确的数据源。  相似文献