扩张模糊算子与模糊真值可能度

本文在半序集上利用△算子与▽算子来讨论模糊集的一般运算形式.进而,利用扩张原理得到扩张模糊算子,证明了在引进的新的序关系下,扩张模糊算子仍为△算子和▽算子.文中还引进了模糊真值可能度,研究了模糊真值可能度的性质.模糊真值逻辑作为模糊真值可能度的特例被引进,并研究了模糊真值逻辑的推理性质.     

多Agent模糊概率信念逻辑

在经典信念形式化研究中,信念在某一可能世界中的真值取值范围是{0,1）。基于新模糊集合论给出信念真值的模糊真值计算方法,将信念的真值取值范围推广到[0,1]。在这样模糊逻辑框架下,将广义概率Aumann语义推广到广义模糊概率Aumann语义,从而建立多Agent模糊概率信念逻辑。在该逻辑中,给出多Agent模糊概率信念逻辑的语法和语义,并且证明了该逻辑系统的可靠性。     

二型模糊真值代数性质

讨论二型模糊真值在连续t-模(┬)与t-余模(┴)下的性质.首先给出具有单调函数的模糊真值性质,二型模糊集在最小t-模与最大t-余模下有限并与有限交的最大值性特征;然后讨论凸模糊集在最小t-模与最大t-余模下的有限并与有限交性质;最后得到具有相同最大值的凸模糊集在二型模糊的并与交运算下构成一个格.     

基于真值限定概念的多条件模糊推理

本文采用 Ｍ Ａ Ｘ－ ⊙复合运算,在基于模糊关系 Ｒｂ 的多条件模糊推理的框架中,依据 Ｊ． Ｆ． Ｂａｌｄｗｉｎ 的真值限定概念,给出具有抽象逻辑特征的一种多条件模糊真值推理方法。     

基于中介真值程度度量处理图像的应用理论研究

中介数学系统是处理模糊现象的一种数学工具.文中首先将中介真值程度的度量方法拓展到对称的数值区域中并结合数字图像的特点,以中介真值程度度量为基础,研究了图像单个像素点灰度的度量、图像集合灰度的度量、图像像素点间的相似性度量以及图像集合问相似性度量.定义了图像中介熵,获得了利用图像中介熵表示的图像离散模糊程度,为处理图像建立了一种新的基于中介逻辑的、自然的数值化方法.     

能够表示缺省知识的模糊推理算法(Ⅱ)

4 真值空间上的交、并运算 1 真值空间上的交运算若V(P)和V(Q)是二个模糊真值限定,可用交运算来组合。由定理1、(7)式和(17)得:     

格型模糊谓词逻辑与推理

本文研究真值取在布尔格上的模糊逻辑与推理。讨论了布尔格的结构性质及其构造、模糊语言的格型模糊谓词逻辑描述和消解法模糊推理。     

基于语言真值直觉模糊推理的公共交通资源投入评估方法

为了在智能信息处理中能够对具有可比性和不可比性的语言值信息进行处理,从而对推理过程中的正、反2个方面证据进行处理,提出一种语言真值直觉模糊推理方法;基于格蕴涵代数和2n元语言真值直觉模糊格,研究了语言真值Kleene-Dienes蕴涵算子和语言真值Zadeh蕴涵算子,讨论两者之间的性质和运算关系;利用所提的蕴涵算子构建一种基于模糊语言值推理的公共交通评估方法,以公共交通资源投入实例来说明方法的合理性。结果表明,与传统的模糊蕴涵算子相比,所提的2种蕴涵算子对具有语言值信息的公共交通资源投入评估分析中的信息应用更加全面,所得的具有语言值信息的评估结果更加接近人类思维。     

基于直觉模糊格的不确定性证据分析

针对属性值和权重均为语言真值直觉模糊对的多属性决策问题,文章提出一种基于直觉模糊格和证据理论的群决策方法:对专家给出的每个方案的属性值和属性权重进行证据合成,根据十元语言真值直觉模糊对LI10格对证据合成结果进行排序,通过案例验证了所提出方法的有效性和合理性。首次用语言值直觉模糊对代替数值进行证据合成和群决策,解决了人的自然语言在转化成数值的过程中会出现信息缺失等问题。     

国际商务谈判中模糊限制语的元功能及语用分析

模糊限制语分为变动型模糊限制语和缓和型模糊限制语。在语义层面,模糊限制语修正命题的真值条件,增强语言的可接受性;在语用层面,模糊限制语的使用能维持谈判顺利进行,确保谈判双赢;在语篇层面,模糊限制语标记话语宏观结构,暗藏丰富话语信息。     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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     

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