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1.
Coomb条件下的传递性偏好断面规律分析   总被引:1,自引:0,他引:1  
对具有传递性的偏好断面规模问题进行研究,讨论了使偏好断面具有传递性的约束条件-Coomb条件,并分析Coomb条件的形式化描述,在此基础上探讨Coomb条件下的传递性偏好断面规模问题,研究满足Coomb条件的偏好断面的特性,给出了满足Coomb条件的偏好序的表示形式,通过对满足Coomb条件的偏好序的特性分析,得到了Coomb条件下的传递性偏好断面规模的计算式。  相似文献   

2.
以∏^φ模糊偏好结构为框架,讨论了该模糊偏好结构的有关传递性性质及在不可比关系为空情形下的有关半传递性质、Ferrers性质。  相似文献   

3.
以Πφ模糊偏好结构为框架,讨论了该模糊偏好结构的有关传递性性质及在不可比关系为空情形下的有关半传递性质、Ferrers性质。  相似文献   

4.
一种给出方案不完全偏好信息的多指标决策方法樊治平,郭亚军,潘德惠本文针对决策者给出决策方案的不完全偏好信息的多指标决策问题,给出了一种逼近于决策方案们好信息的决策分析方法,并给出了一个算例.一种给出方案不完全偏好信息的多指标决策方法@樊治平,郭亚军,...  相似文献   

5.
对具有传递性的偏好断面规模问题进行研究.讨论了使偏好断面具有传递性的约束条件--Coomb条件,并分析Coomb条件的形式化描述;在此基础上探讨Coomb条件下的传递性偏好断面规模问题,研究满足Coomb条件的偏好断面的特性,给出了满足Coomb条件的偏好序的表示形式;通过对满足Coomb条件的偏好序的特性分析,得到了Coomb条件下的传递性偏好断面规模的计算式.  相似文献   

6.
针对基于方案对比较的不完全模糊偏好信息的方案优选群决策问题,通过引入模糊偏好关系中的可加一致性概念,提出了一种估算评估专家缺失的偏好信息的迭代估算方法。该方法仅仅依赖专家在可加一致性和可加互补性基础上提供的信息,而不用考虑其他专家的信息,因而估算出来的偏好信息能够与专家原始偏好信息保持良好的一致性,从而提高了估算结果的可信度。最后给出了一个算例。  相似文献   

7.
关于单峰单凹混合约束的特性分析   总被引:1,自引:0,他引:1  
对具有传递性的偏好断面约束条件进行研究。介绍使偏好断面具有传递性的约束条件-单峰单凹混合约束,在此基础上分析单峰单凹混合约束的特性。将满足单峰单凹混合约束的偏好序分为两个集合,分别讨论两个集合中偏好序的特性,给出其描述形式,从而得到所有满足单峰单凹混合约束的偏好序的描述形式。这将有利于单峰单凹偏好断面规模问题的解决。  相似文献   

8.
对「0,1」上一般的算子‘*’引入*-紧Fuzzy关系及-可分解Fuzzy关系的概念,证明了保并算子‘*’及产算子‘*’所定义的-可分解和-可分解Fuzzy关系在某种意义上构成了新的可传递Fuzzy关系类,并具还给出了这些类在不同类型的传递性之间的一种位置关系,特别地对二元-可分解Fuzzy关系,我们还得到了一个关于其传递性的完全刻画。  相似文献   

9.
本文首先定义模糊α-真的概念,然后以Mizumoto所给方法[1]为例,研究了模糊推理的有关性质及推理规则,最后给出关于模糊α-真和在这种推理运算规则下的模糊推理模型.  相似文献   

10.
模糊关系运算的传递性   总被引:1,自引:0,他引:1  
详细讨论模糊关系一元及二元运算的传递性性质。首先给定一个模糊关系具有某种传递性性质,讨论其余关系、逆关系、对偶关系的传递性性质;然后基于两个模糊关系具有某类传递性,讨论它僮的模并、模交运算的传递性性质。  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
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.  相似文献   

14.
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。  相似文献   

15.
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.  相似文献   

16.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

17.
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.  相似文献   

18.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

19.
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-  相似文献   

20.
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-  相似文献   

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