GIS空间分析与模糊综合评判在银行ATM网点选址中的应用

空间分析是GIS的核心和灵魂,是GIS区别于一般信息系统的主要标志之一。运用GIS空间分析中的叠置分析、缓冲区分析、网络分析等功能对自动柜员机(ATM)网点进行选址,应用模糊综合评判模型对选址区位评价确定出ATM布放的最终布局,并通过实例验证该方法能为在ATM网点选址中提供决策依据,最后探讨了今后研究的方向。     

测量控制网优化设计的可靠性准则法

测量控制网优化设计与网的精度、可靠性、灵敏度以及费用等准则有关,但这些准则之间的关系又十分密切,本文提出了一种基于观测值内部可靠性指标的测量控制网模拟法优化设计新方法,介绍了其原理和特点,并用实例说明了用该方法的计算步骤和优化效益。     

随机Dirichlet问题解的调和展开

针对重力学随机Dirichlet问题,通过适当地对边界检验函数的分解,并在随机边界样本空间中提取确定性部分的对偶基,本文将随机Dirichlet问题的一般解展开为一随机系数的调和级数形式。     

吐哈盆地丘东凝析气藏中侏罗统储层流动单元划分

对吐哈盆地丘东凝析气藏中侏罗统储层的流动单元的划分方法和参数选取进行探讨。针对丘东凝析低渗透气藏的储层和流体特点,纵向上对研究区中侏罗统地层进行小层精细划分,平面上应用SPSS统计分析软件对厚度、孔隙度、泥质含量、流动带指数等4个参数进行聚类分析和判别分析,将研究区中侏罗统储层砂体划分为4类流动单元。结果表明各流动单元的类型与储层物性、沉积微相具有很好的对应关系,能够客观地反映气藏储层的地质特征。虽然丘东凝析低渗透气藏中流动单元的划分和油藏中流动单元的划分没有太大差别,但是参数的选取却与油藏中的存在着明显的不同。     

鄂尔多斯盆地合水地区长8储层特低渗透成因分析与评价

鄂尔多斯盆地合水地区长8储层的物性总体较差,发育粒间孔、溶孔,孔隙结构类型属小孔隙、微细喉道和微喉道型;分析表明其特低渗透成因主要受沉积作用和成岩作用的共同影响,不同沉积微相储层的物性差异较大,柔性组分含量高、粒度细和成分成熟度较低是造成储层特低渗透特征的主要原因;同时成岩压实、胶结作用使得储层的孔隙度减小、渗透性变差,而溶蚀作用和少量成岩微裂缝的产生又在很大程度上改善了储层的特低渗透性能;水下分流河道与河口坝砂体是研究区主要储层的分布相带.     

山东三山岛金矿床流体包裹体特征及其地质意义

三山岛金矿床位于莱州市三山岛—仓上断裂带内,矿石主要为蚀变岩和含金石英脉2种类型。随着胶东金矿床研究的深入和三山岛金矿资源的不断减少,对三山岛金矿床的成矿作用及深部开发前景问题研究具有更重要的意义。针对上述问题,对三山岛金矿床2种类型矿石的成矿流体特征进行对比研究,认为代表成矿早—中期的蚀变岩型矿石形成于中温(均一温度为325～240℃)、低盐度(2.07%～6.88%)、低密度(0.720～0.868g/cm3)、酸碱性不均匀(pH=3.27～10.43)、以氟化物和氯化物为成矿物质载体的还原性流体;代表成矿中—晚期的含金石英脉型矿石形成于中—低温(均一温度为306～160℃)、低盐度(1.05%～9.73%)、低密度(0.739～0.962g/cm3)、碱性(pH=9.25～9.85)、以氯化物和硫化物为成矿物质载体的还原性流体。成矿流体性质的转变反映了成矿流体处于由比较封闭到比较开放的构造环境的转变期,且成矿流体早期以原生岩浆水为主,后期有变质水、大气降水以及海水的参与作用。三山岛金矿成矿深度为2.5～5km,根据目前的开采深度推算其深部还有一定的资源量可供开发。     

川西新场气田地气测量试验

通过对新场气田地气测量分析,发现地气测量的纳米微粒金属元素在新场气田上方有明显的异常显示。综合土壤地球化探结果对比分析,认为Ba、Cd、Cu、Mo、Zn、P、V、Ni等20多种纳米微粒金属元素在新场气田与相同的土壤微量元素都有着共同的响应。同时分析了有机地球化学指标在气田地表上方的表现模式,其特征和地气、土壤元素表现基本一致。地气测量方法在一定条件下对寻找天然气藏、确定气田范围具有一定的应用前景。     

基于ArcGIS的1:5万DLG数据库生成地形图的设计与实现

探讨在ArcGIS环境下利用1:5万DLG数据库直接生成地形图的若干关键技术,如定制1:5万DLG符号库、符号配置,并给出地形图生产的完整的工艺流程,这样能够缩短1:5万地形图的成图周期,提高工作效率。     

<Superscript>40</Superscript>Ar-<Superscript>39</Superscript>Ar dating of lamprophyre dykes in the Baimazhai nickel deposit,Yunnan Province,China, and its geological significance

The Baimazhai nickel deposit, Yunnan Province, China, is located in the southern part of the Sanjiang （Tri-river） alkali-rich intrusive rock belt （Sanjiang ARIR）. In this paper was conducted ^40Ar-^39Ar dating of two phlogopites in lamprophyres which are, as dikes, widely distributed in the orefield, and two plateau ages were acquired, i.e., 32.46±0.62 Ma and 32.01±0.60 Ma, respectively （averaging 32.23±0.60 Ma）. The ages are obviously younger than those of the ore-hosted complex and mineralization of the Baimazhai nickel deposit. In combination with the characteristics, it is indicated that lamprophyres in the orefield and those in the Sanjiang ARIR are similar in tectonic setting, mineral assemblage and geochemistry. It is considered that lamprophyres in the orefield are the important component of the Sanjiang ARIR, and the lamprophyres and ore-hosted complex in the orefield represent the products of two times of different magmatic activity from different mantle sources. On the other hand, the age of lamprophyres in the orefield is older than that of the strike-slip shearing of the Ailaoshan-Honghe fault belt, suggesting that the strike-slip shearing of the Ailaoshan-Honghe fault belt is not the factor leading to magmatic activity of lamprophyres in the orefield, while it is more possible that magmatic activity of the Sanjiang ARIR promoted strike-slip shearing of the fault belt.     

Multifractal Analysis of Element Distribution in Skarn-type Deposits in the Shizishan Orefield, Tongling Area, Anhui Province, China

A series of element concentrations sampled from four drill cores with a length about 1000 m into different skarn-type deposits were selected from the Shizishan orefield, central Tongling, southeastern part of Anhui Province. Using the multifractal method, the distribution and migration characteristics of the major and trace elements are analyzed. The multifractal spectrum of the major elements is left-skewed, whereas the spectrum of the trace elements is right-skewed, which shows that in the process of skarn formation, the trace elements were enriched only locally, and major elements transported within a much larger range. The correlation coefficients of the multifractal parameters Aa （width of the multifractal spectrum） of the four drill cores are relatively low, but the correlation coefficients of the multifractal parameters R （spectrum symmetry parameter） and Af are relatively higher, indicating that although the non-homogeneous intensity of the distribution of elements is inconsistent, their spatial accumulation patterns are almost the same during the ore-forming process. The statistics of the mnltifractal parameters of various elements in the different locations show that the ore-forming processes and element migration pattern in the Shizishan orefield are consistent, and that the migrations of trace elements and major elements exhibit some differences.