泛克立格法在渗透系数随机场离散中的应用及存在的问题

在分析各种随机场离散方法优缺点的基础上,提出用泛克立格方法对渗透系数随机场进行离散.编制了KRING.FOR程序对渗透系数随机场的离散效果进行了验证,结果表明在实测点所包围区域内部用最小二乘法所求解得到的权系数而进行的克立格估值计算是符合工程要求的.并针对程序调试过程中及计算结果分析中所出现的问题,提出了相应的解决对策.     

对数正态克立格法理论及其应用

本文首先讨论了对数正态分布及三参数对数正态分布理论,然后重点研究了对数正态克立格法。在分析了无偏条件及最小估计方差之后,给出了对数正态克立格法方程组及对数克立格方差。克立格权系数λ_a即为该方程组的解。据此,可以估计矿床中每一块段的克立格估值Z_v,该估值是具最小估计方差的无偏线性估计量。该法已用于一个铁铜矿床的储量计算。     

土壤特性的空间差异及其空间插值方法研究

对土壤养分的空间差异及其空间插值方法进行研究,获得田间土壤养分的连续空间分布,是精准农业技术体系中用GIS管理和分析土壤背景数据的一项基础性工作.本研究对一块面积为28533m2的旱地以30m×30m间隔采样,获36个有关土壤速效钾、速效磷和有机质含量的采样数据.用移动平均、趋势面拟合、点状克立格、逆距离加权等空间插值方法得到各种插值的连续空间分布,与同期用15m×15m采样间隔所得132个实际观察数据进行比较,结果表明几种插值方法并无显著差异,但其中以克立格和逆距离加权插值整体效果最好,尤以克立格指数模型最佳.     

克立格方法在区域化探数据处理中的应用

针对克立格支助有征变量空间结构特征，以团结沟金矿研究区的化探数据处理为例，讨论了一般多元统计方法、协同克立格方法和普通克立格方法在化探元素间的相关分析结果。协同克立格方法对原始数据进行估以的绝对误差的均值要比用其它方法得到的绝对误差的均值低，标准差也明显降低。相比之下，协同克立格方法在一定程度上较为优越，它提高了地质统计学的预测精度，缺点是计算工作量较大。     

一种估计区域生物灾害空间分布的方法

介绍一种研究区域生物灾害空间分布的方法：基于区域化变量理论的克立格插值技术,包括空间半变异方差的计算及其曲线的拟合,克立格内插权重的推导,以及待估点内插值的计算。通过构造一个简单例子,说明该方法在生成区域生物灾害空间分布情景中的独特作用。     

应用GEO-EAS软件进行露天矿区域化变量评价

结合露天煤矿区域化变量评价的具体情况,论述了地质统计学中变异函数的确定与拟合、克立格估值以及参数选择等基本理论和方法,介绍了GEO-EAS交互式软件包的主要特点和功能,提出了露天矿区域化变量评价的流程.最后以某露天矿为例,建立了17#煤层厚度的理论半变异函数模型,对其变异规律和勘探程度进行了分析评价;绘制了克立格估值等值线图、渲染图以及方差等值线图,并对其空间分布和估值精度进行了评价.实践证明,该软件在煤层、煤质以及开采指标评价等方面具有广阔的应用前景.     

福建行洛坑钨矿变异函数模型的研究

以行洛坑细-网脉状钨矿为实例,对服从对数正态分布的区域化变量,分别用原始品位值和对数变换值建立变异函数模型。通过交叉验证等方法研究表明,对原始数据进行对数变换所得到的模型能更好地揭示区域化变量的空间变化规律,而且,对数线性克立格估值也比线性克立格估值更佳。     

利用克立金方法预测湿地水质的变化趋势

将空间域上的克立金方法延伸到时空域中,得出当时间信息量大于空间信息量时区域化变量的无偏最优估计形式,进而给出时间域上克立金的估计形式,最后利用该方法对某湿地近几年水体中BOD-DO的未来的趋势进行了预测,实例说明该方法是一种比较稳健的预测方法.     

变异函数自动拟合初探

克立格法是估计矿石储量的一种较新方法,目前使用该方法时,求实验变异函数及作克立格估值均可在电子计算机上自动进行,唯由实验变异函数拟合理论模型时还要依靠手工,它妨碍了由原始数据到储量估算整个过程的自动化。本文从变异函数的统计性质出发,探讨了变异函数的自动拟合问题,得到了一些初步的结果。     

地统计学方法在环境污染研究中的应用

空间自相关性是环境变量普遍具有的一个统计特征.地统计学方法是描述、模拟和预测这一类变量空间变异特征的有效工具.本文概述地统计学方法在环境污染研究中的应用情况,主要包括:通过变异函数分析来描述和模拟环境变量的空间分布结构;由克立格插值技术来估算环境变量在未采样点处的取值;采用多元地统计学方法研究多个环境变量间的空间相关结构;通过指示地统计学方法评价空间插值的局部不确定性以及进行环境变量空间分布的随机模拟等.同时结合实例分析,简要探讨了地统计学方法在描述、预测环境变量空间结构特征和空间相关分析方面的优势.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that