基于RCC及粗糙模型的模糊地理对象拓扑关系表达

在粗糙集的基本概念上定义了二维离散空间中的粗糙区域和粗糙模型,基于粗糙模型描述了二维离散空间中的模糊地理对象,并给出了粗糙区域的类型。在RCC-D-8的基础上,依据模糊地理对象拓扑关系之间的概念临近及拓扑约束关系,研究得出了二维离散空间中简单模糊地理对象之间的599种全拓扑关系。     

2D空间模糊区域之间拓扑关系的定性描述

地理空间实体的模糊不确定性是客观存在的.本文首先对九元组模型进行了扩展,其次根据模糊拓扑理论对模糊区域之间的空间拓扑关系进行定性的分析,最后研究模糊区域之间空间关系在空间语义上的表达.     

模糊区域间空间关系的组合推理

模糊性区域的空间目标之间的空间关系描述与推理问题在近年来成为GIS界研究的一个热点.本文首先讨论了模糊区域的定义和边界问题,然后把描述确定性区域的9交模型引入到模糊区域,建立了二维空间中描述模糊区域之间的9交模型,最后提出了基于空间方向关系和空间拓扑关系的组合推理方法.     

0-维模糊拓扑空间

本文的主要工作是在模糊拓扑空间中引入了模糊E.ech O-维数以及模糊Урыcoн-Menger O-维数的概念,这是分明拓扑空间中的E.ech O-维数和Уpыcoн-Menger O-维数在模糊拓扑空间的推广。讨论了两种模糊O-维数的特征刻划及性质,得出了在T_1拟完全紧的模糊拓扑空间当中两种模糊O-维数之间的关系。     

一种模糊区域之间拓扑关系的描述方法

在地理空间推理中,空间关系是一类重要的研究内容,其主要研究成果体现在空间拓扑关系,空间距离关系,空间方向关系方面的研究.随着GIS的发展,人们越来越认识到研究空间拓扑关系的重要性.本文在分析模糊拓扑关系的基础上,提出利用模糊数学的贴近度来描述模糊区域空间关系的拓扑关系,并对其优化.     

移动对象时空拓扑关系模型

时空拓扑关系是移动对象时空特性研究的一个重要内容。针对二维欧氏空间内的平面移动对象,建立基于时间片的时空数据模型。并基于点集理论定义移动对象时空拓扑关系的定性模型,表达为由9交模型描述的时态拓扑关系和空间拓扑关系的复合。同时提出其时空拓扑有效性、可计算性约束及其计算规则,进而给出移动对象动态时空特征的表达方法。该模型提出了一种移动对象时空拓扑关系的表达和计算方法,有效的刻画其动态特征,可以为移动对象数据库及其时空查询提供理论基础     

自反、传递(模糊)关系与拓扑空间

研究了自反传递模糊关系与拓扑空间的联系,证明了一个自反传递的模糊关系对应一个单调的拓扑空间族,从而对应一个模糊化拓扑.特别地,当R是自反传递关系时,该拓扑族退化为一个拓扑空间,该拓扑空间以粗糙下近似为其内部算子.     

GIS面目标间拓扑关系的粗糙表达模型

在分析传统9交模型和特例4交模型的基础上,利用粗糙集理论的下近似RA表示空间实体内部,边界域A-RA表示空间实体的边界,并结合粗糙集中的变精度粗糙集、模糊粗糙集分别建立了基于粗糙集和4交模型的空间面状实体拓扑关系的三种粗糙表达模型。     

关于粗糙集中的导集拓扑及性质之研究

为了研究粗糙集与导集拓扑之间的关系,文中以粗糙集、导集运算、拓扑空间为研究对象,采用文献研究法、数学方法、探索性研究法,先定义了粗糙集中的导集运算,然后构建和证明了糙集中的导集拓扑,研究结果表明糙集中的存在导集拓扑,并取得了在粗糙集中用开集公理建立的拓扑和用导集运算建立的拓扑是等价的、粗糙集中满足导集运算和拓扑空间闭包运算的结论,该结论推广了粗糙集中已有的拓扑研究。     

基于二型模糊集理论的应急设施选址方法

为了研究应急管理中的应急设施选址问题,在传统选址方法基础上,提出了一种基于二型模糊集理论的应急设施选址方法,以区域人口密度量化应急资源需求程度,构建选址集最大覆盖模型.由于人口的流动性,采用二型模糊变量描述人口密度信息,二型模糊变量可提供不确定性建模额外的自由度.在置信度理论框架下,将原模糊模型转化为其等价确定性模型.针对模型中大规模复杂高维的空间地理数据,设计了一种基于网格空间表示法的矩阵编码策略与遗传算法耦合进行模型求解.研究表明:矩阵编码策略可以有效避免维数灾难,并且能够显著提升求解效率,所提方法可以提供合理的应急设施选址决策,以提升突发事件应急管理水平.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with