Semantic Visual Variables for Augmented Geovisualization

ABSTRACT

The human–cyber–physical world produces a considerable volume of multi-modal spatio-temporal data, thus leading to information overload. Visual variables are used to transform information into visual forms that are perceived by the powerful human vision system. However, previous studies of visual variables focused on methods of ‘drawing information’ without considering ‘intelligence’ derived from balancing ‘importance’ and ‘unimportance’. This paper proposes semantic visual variables to support an augmented geovisualization that aims to avoid exposing users to unnecessary information by highlighting goal-oriented content over redundant details. In this work, we first give definitions of several concepts and then design a semiotic model for depicting the mechanisms of augmented geovisualization. We also provide an in-depth discussion of semantic visual variables based on a hierarchical organization of the original visual variables, and we analyse the critical influencing factors that affect the choice of visualization forms and visual variables. Finally, a typical application is used to illustrate the relevance of this study.     

Relative astrometric and photometric measurements of visual binaries made with the Nice 76‐cm refractor in 2008

We present relative astrometric and photometric measurements of visual binaries made in 2008, with the 76‐cm refractor of Côte d'Azur Observatory. Our observing list contains orbital couples as well as binaries whose motion is still uncertain. Three different techniques were used for obtaining measurements: Lucky imaging, speckle interferometry and the Direct Vector Autocorrelation method. We obtained 2420 new measurements of the relative position of 2225 objects, with angular separations in the range 0″.07‐11″.5, and an average accuracy of 0″.02. The mean error on the position angles is 0°.6. We managed to observe faint systems (m_V ≈ 12) with large magnitude difference (up to Δm_V ≈ 5). We have thus been able to measure many systems containing red dwarf stars that had been poorly monitored since their discovery. We also measured the difference of magnitude of the two components of 376 objects with an estimated error of 0.1 mag. Finally, we provide a list of 33 newly discovered components of multiple or binary systems, which is a significant complement to our GII catalog (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Matlab三维可视化编程在砂岩型铀矿勘查中的应用

根据Matlab编程简单、数据处理功能强大和图形可视化方便的特点,提出了将Matlab三维可视化编程、系列物探曲线解译和砂岩型铀矿理论相结合的找矿方法。通过实例验证表明,该方法能有效地识别矿体、追索矿体走向、圈定矿体范围、分析沉积环境,可在铀矿勘查中发挥重要作用。     

地质科技论文中语言文字表达的几个要求

根据地质科学的研究特点,针对地质论文语言文字表达方面存在的一些问题,结合编辑实例,阐述了地质科技论文语言表达的准确性、简练性、平实性、生动性和规范性要求。准确性要求用字用词要得当,语句要符合语法和语言逻辑;简练性要求要用最简洁的语言表达丰富的内容;平实性要求语言表达质朴、自然;生动性要求语言表达富有生气、感染力;规范性要求论文的撰写符合国家标准规范。文章还指出了提升地质论文语言表达能力的途径。     

Cu,Zn和Cd对5种单细胞藻的酶基因表达调控的研究

报道了在Cu2 +、Cd2 +和Zn2 +的毒害作用下 ,三角褐指藻 (PhaeodactylumtricornutumBohlin) ,湛江叉鞭藻 (IsochrysiszhanjiangensisHu &Lui) ,绿色巴夫藻 (PaviovaviridisTsengChenetZhang) ,青岛大扁藻 (Platymonashelgolandicavar.TsingtaoensisTsengetT.J.Chang) ,小球藻(Chlorellasp.)等单细胞藻的苹果酸脱氢酶发生了明显的变化。其中 ,不同种类重金属离子对该酶的基因表达作用不同 ,即使是同种离子但浓度不同 ,这种作用也不同。一般情况下高离子浓度抑制了酶基因的表达。低离子浓度促进了表达。但也有例外 ,如Cd2 +(24.53μg/ml)、Zn2 +(24.31,16.21μg/ml)促进三角褐指藻MDH 1座位等位基因的表达量 ;Cd2 +(24.53,12.26μg/ml)促进小球藻MDH 1座位等位基因的表达量。由此可推出 ,重金属离子可以干扰等位基因的表达 ,并在等位酶的活性上表现出来     

土体的观察和描述

野外观察和描述是地质调查、勘查最基本且最重要的手段,也是地质工作者必须掌握的基本功。本文结合最新发布的技术规范要求,结合甘肃省第四纪地层特点及分布,对野外土体观察和描述的内容进行了概要总结,对不同目的水文地质、工程地质角度的对土体的观察着眼点进行了分析,并对开展野外调查工作中如何提高调查质量、取得更有价值的原始资料提出了相关建议。     

http://www.sciencedirect.com/science/article/pii/S167498711100137X

This study presents promising variants of genetic programming (GP),namely linear genetic programming (LGP) and multi expression programming (MEP) to evaluate the liquefaction resistance of sandy soils....     

一种自适应的数字栅格地图可见水印算法

基于数字栅格地图的数据特性,运用小波变换工具,结合人类视觉系统特征,提出一种自适应的数字栅格地图可见水印算法。首先,对可见水印信息进行扩展等预处理;然后通过计算数字栅格地图的视觉重要区域来选择水印嵌入位置,水印嵌入位置由人类视觉系统特征和地图数据特性共同决定;最后,将可见水印自适应地嵌入地图所选择嵌入区域的小波域中。对提出的水印算法进行了试验分析,结果表明,该算法不仅具有良好的抗差性,同时还较好地保持了可见水印和原地图的视觉特征,以一种更积极有效的方式保护了数字栅格地图的版权。     

空间数据的栅格与矢量自适应可视化表达研究

为优化WEBGIS中空间数据的可视化表达效率,对栅格图片和矢量文本两种表达方式进行实验比较,文中提出矢量文本表达方式的结果数据量大小最终需要取决于用于描述空间数据的顶点信息量之和,因此不具有普适性,同时证明当顶点信息量之和在一定范围内时其效率又要优于栅格表达方式,在此基础上提出空间信息的栅格与矢量自适应数据表达模式。实验表明,该模式确实很好地提高了空间数据表达效率。     

面向空间数据更新的多源数据融合关键技术研究

针对当前空间数据融合与持续高效更新存在的问题,对多源数据融合的理论和方法进行深入研究,目的是提高多源数据的智能化融合程度和融合效率,进而推进多源数据的应用和成果转化.文中着重阐述了面向空间数据更新的资料分析与评价、数学基础一致性处理、矢量数据语义转换、多源数据的组织与管理、数据定位精度提高检验和面向应用需求的多模式表达等关键技术.