基于Voronoi图的遥感影像校正地面控制点选取

遥感影像几何校正时要求选取的地面控制点应尽可能在整幅影像内均匀分布,而对于均匀分布的理解主观性较强。本文运用Voronoi图控制地面控制点的均匀分布,并建立了控制点的分布与数量的联系,使选取的地面控制点分布均匀,且数量足够。实验证明,用Voronoi图控制地面控制点的均匀分布,是提高遥感影像多项式几何校正精度的有效途径。     

基于空间关系的海上应急救援力量调度模型

本研究以Voronoi图为研究工具,对普通Voronoi图在海上救援应用中的局限性进行分析,并对其进行了合理改进,提出了“海上救援V图”。同时,结合模糊层次分析法和引力模型方法计算各海事机构救援力量的“吸引力”权重矩阵,提出了基于Voronoi图的海上救援调度模型。最后,结合具体救援案例,构建了基于Voronoi图的海上应急救援模型MRSV。实验结果表明：该模型能够在顾及海上特殊地理环境以及要素间空间关系的基础上,综合考虑各海事机构的救援力量,针对不同海难情况,选调合适的救援机构,调度结果合理,能够达到优化救援力量配置的目的,可以为目前海上应急救援力量调度提供参考。     

一种基于面向对象的企业建模技术

将一种面向对象的思想应用于企业建模中 ,利用面向对象的技术实现功能模型和信息模型的集成。对象的独立性和封装性增强了系统的鲁棒性 ,能适应企业功能和结构的动态重组。提出了对象状态图、对象状态矩阵和对象属性矩阵 ,容易贯彻“自顶向下”的系统分析策略 ,使系统的外部视图(用户视图 )与内部视图 (计算机视图 )统一 ,达到清晰的、完整的描述系统的目的。     

Photometric Survey of Galactic Open Clusters

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单触法可编程控制器程序设计

用于顺序过程控制的程序设计方法－－单触法,规则、快捷、应用简便,可用于可编程控制器（ＰＣ）及硬件继电器控制电路的程序设计,阐述了设计原则与设计步骤,说明了单一顺序、并发顺序、选择顺序、循环等不同结构控制程序的设计方法,讨论了该方法的限制及实用价值。     

Eh—pH相图在玉龙铜矿床次生富集作用研究中的应用

玉龙铜矿床表生成矿过程中成矿物质主要呈碳酸盐络合物的形成迁移。以孔雀石,蓝铜矿组合为主的次生富集带是在碱性,氧化的环境中形成的,所以它们相对靠近氧化带的上部及碳酸盐岩发育的地区分布。以赤铜矿,自然铜组合为主的次生氧化物富集带形成环境为弱氧化－还原,它们常靠近氧化带的中,下部分布。表生成矿环境中ＣＯ２含量高是玉龙铜矿床氧化带中黑铜矿极不发育的根本原因。『     

Polar Mohr diagram method and its application in calculating the shear displacements of general shear zones with volume loss

The main problem, in determining the shear displacement of a general shear zone with volume change using the available formula, is that it is hard to know the initial angle between the planes (or lines) in the plane of shear. A planar deformation analysis of this kind of ductile shear zone is carried out with the polar Mohr diagram. If the volume change is induced by homogeneous contraction in the Z direction of the shear zone, there are sufficient conditions for constructing a polar Mohr diagram regardless of sequence of the simple shear and volume change. Therefore, the angle between a line and the shear direction before and after the deformation can be measured. Making use of these lines the shear strain and the volume change can be calculated and the shear displacement can be determined.     

Amphibolites with staurolite and other aluminous minerals: calculated mineral equilibria in NCFMASH

Amphibolite facies mafic rocks that consist mainly of hornblende, plagioclase and quartz may also contain combinations of chlorite, garnet, epidote, and, more unusually, staurolite, kyanite, sillimanite, cordierite and orthoamphiboles. Such assemblages can provide tighter constraints on the pressure and temperature evolution of metamorphic terranes than is usually possible from metabasites. Because of the high variance of most of the assemblages, the phase relationships in amphibolites depend on rock composition, in addition to pressure, temperature and fluid composition. The mineral equilibria in the Na₂O–CaO–FeO–MgO–Al₂O₃–SiO₂–H₂O (NCFMASH) model system demonstrate that aluminium content is critical in controlling the occurrence of assemblages involving hornblende with aluminous minerals such as sillimanite, kyanite, staurolite and cordierite. Except in aluminous compositions, these assemblages are restricted to higher pressures. The iron to magnesium ratio (X_Fe), and to a lesser extent, sodium to calcium ratio, have important roles in determining which (if any) of the aluminous minerals occur under particular pressure–temperature conditions. Where aluminous minerals occur in amphibolites, the P–T–X dependence of their phase relationships is remarkably similar to that in metapelitic rocks. The mineral assemblages of Fe‐rich amphibolites are typically dominated by garnet‐ and staurolite‐bearing assemblages, whereas their more Mg‐rich counterparts contain chlorite and cordierite. Assemblages involving staurolite–hornblende can occur over a wide range of pressures (4–10 kbar) at temperatures of 560–650 °C; however, except in the more aluminous, iron‐rich compositions, they occupy a narrow pressure–temperature window. Thus, although their occurrence in ‘typical’ amphibolites may be indicative of relatively high pressure metamorphism, in more aluminous compositions their interpretation is less straightforward.     

基于GIS的任意发生元Voronoi图逼近方法

许多地理问题的空间分析中需要采用Voronoi图,但是目前我们尚缺乏一些简单的易于实现的构建任意发生元Voronoi图的方法,也缺乏一个能直接生成任意发生元Voronoi图的软件,为此我们提出了一种基于GIS的构建任意发生元的未加权Voronoi图的逼近方法。首先用有限点来逼近原始发生元,然后构建这些点发生元Voronoi图,最后消除那些属于同一发生元的顶点和边,即得到原始发生元的逼近的Voronoi图。在该算法的具体实现过程中,充分利用了现有GIS软件可以生成点发生元Voronoi图的特性和处理空间数据的能力。试验结果表明,这种方法可以生成未加权的任意形状发生元的逼近Voronoi图,能满足地理问题空间分析的需要。如地理客体可以是点状地理客体(城市、县城、交通枢纽、商业中心和金融中心等)、线状地理客体(交通运输线、经济地带和河系等)、面状地理客体(经济区、公园和绿地等)或者它们的组合,它们的空间影响范围或空间服务范围都可以采用Voronoi图来界定。