一种基于区间值 Pythagorean 三角模糊语言集的多准则决策方法

为提升不确定环境下信息描述的准确性, 提出了区间值勾股三角模糊语言集(interval-valued pythagorean triangular fuzzy linguistic set, IVPTrFLS), 并研究了区间值勾股三角模糊语言变量(IVPTrFL variable, IVPTrFLV)相关的基本理论. 同时, 针对区间值勾股三角模糊语言环境的多准则决策问题, 提出了一种改进的基于区间的组合评价(combinative distance-based assessment, CODAS)方法, 即 IVPTrFL-CODAS 法. 首先, 定义了 IVPTrFLV 的概念、运算法则、Score 函数、Accuracy 函数及距离公式, 提出了区间值勾股三角模糊语言优先加权(IVPTrFL prioritized weighted arithmetic averaging, IVPTrFLPWAA)算子, 并对计算规则及算子性质给予证明; 然后, 通过求解属性权重的相对重要性系数, 建立了基于 IVPTrFLV 的改进 CODAS 方法; 最后, 通过实例对所提出方法的有效性及稳定性进行了验证.     

一种基于新的不确定语言集成算子的多属性群决策方法

针对不确定语言评价信息的多属性群决策问题,为避免直接运算时产生的越界现象,文章构建基于等信息转换理论的不确定语言模型,定义该模型下的新运算法则,提出新运算法则下的广义不确定语言加权平均算子(ULWA_2)和广义不确定语言有序加权平均算子(ULOWA_2).基于所定义的不确定语言集成算子,文章提出一种多属性群决策方法,并通过实例说明该决策方法的可行性与有效性.     

基于直觉二元语言评价的多准则决策方法

针对直觉语言信息的多准则决策问题,定义了直觉二元语言数的概念及其运算法则,以及直觉二元语言数的期望值和精确值,提出直觉二元语言和(IBLS)算子与直觉二元语言加权平均(IBLWA)算子,并讨论了IBLWA算子的相关性质。基于直觉二元语言和算子和加权平均算子,提出一种准则权重已知且准则值为直觉语言信息的多准则决策方法,并通过算例说明该方法的有效性。     

毕达哥拉斯不确定语言Maclaurin对称集成算子及其在多属性决策中的应用

毕达哥拉斯不确定语言变量是直觉不确定语言变量的拓展和一般化.针对毕达哥拉斯不确定语言变量的集成问题,首先结合语言刻度函数,提出新的毕达哥拉斯不确定语言变量运算法则和排序方法,克服已有运算存在的缺少封闭性和灵活性的不足.进而,提出了捕获多元关联关系的毕达哥拉斯不确定语言Maclaurin对称集成算子(PULMSM)及其加权形式(PULWMSM),并探讨其优良性质和特例.最后,提出一种基于PULWMSM的毕达哥拉斯不确定语言多属性决策方法,并通过实例来分析其合理性和有效性.     

基于LOWGA算子集结的组合语言判断矩阵保持互反性的条件

语言有序加权几何平均(LOWGA)算子是一种能有效地集结语言数据信息的方法.利用语言判断矩阵的转换函数定义了语言互反判断矩阵,利用LOWGA算子进行集结,同时采用模糊语言量化算子(BUM函数)的方法确定其权向量时,涉及到BUM函数中参数对的选择问题.主旨研究了基于LOWGA算子集结组合语言判断矩阵保持互反性的条件.     

权重为区间数的语言多属性群决策方法

利用不确定语言评估标度的运算法则,给出基于语言评估标度及其运算法则的算子,提出一种基于区间权重语言集结(IWLA)算子和不确定语言混合区间权重集结(ULHIWA)算子的语言多属性群决策方法,并用实例验证该方法的可行性及合理性.实例分析表明,该方法计算简便,能够充分利用已有的决策信息,而且能够充分考虑决策者自身的重要性,并且可以消除个别决策者主观因素的影响,保证了决策结果的合理性.     

指数型整函数Birkhoff型缺插值的推广

通过引进差分多项式算子P((1)/(2h)Δh),研究了一类等距结点上指数型整函数(0,P((1)/(2h)Δh))的Birkhoff型缺插值问题,给出它在B2σ中有惟一解的充分必要条件和这种插值函数的明显表达式,同时讨论了插值算子的收敛性.     

模糊扩展DSmT在移动机器人环境感知中的应用

通过考虑模糊理论中的不同模糊T-模算子扩展dezert-smarandache理论(DSmT),发展了一种更一般、更灵活的组合规则来融合不同信息源;并把这种方法与δ领域轮廓匹配方法相结合应用到移动机器人的环境感知中,通过比较不同T-模算子在地图创建中的效果,找到了解决环境感知中不确定信息融合的有效途径.     

组合数的一种矩阵表示及应用

给出由一对恰当的指数型发生函数所确定的无穷矩阵表示二元组合序列的方法．通过发生函数的代数运算，可用于统一处理一些涉及二项式系数及Ｓｔｉｒｌｉｎｇ型数偶的组合恒等式．最后，给出这种无穷矩阵的同余性刻划     

半亚正常算子的函数模型

夏道行教授于[1]中引入了半亚正常算子T=VP,它满足p-VPV~*=R~2≥0。这儿T=VP是T的极分解.易知这时V总可以延拓为上的等距算子.[1]在V为酉算子的假设下给出了T的函数模型.本文对V为一般的等距算子情况给出T类似的函数模型. 文[2]对等距算子的结构给出了Wold分解,即每个等距算子V可以直和分解为一个酉算子u和一个单向平移算子S.相对于这个分解,T有表示     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the