首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
在直觉模糊集理论基础上,结合模糊蕴涵的概念,构造了一个新的蕴涵算子,证明了该算子满足边界性、正则性、单调性等一些重要性质.在此基础上,证明了该蕴涵算子和直觉模糊交运算可构成直觉模糊剩余格.  相似文献   

2.
给出了模糊形式背景下一种由Lukasiewicz蕴涵算子构造的模糊概念格的定义方式,讨论了它的性质,并给出了计算模糊概念的算法。最后,给出了一个数值例子,说明了在该定义下形成的模糊概念格。  相似文献   

3.
基于对偶三角模,将直觉模糊粗糙集模型在完备格上进行统一处理:首先在完备格上引入非算子的概念,定义和讨论了完备格上基于t算子的直觉模糊集及其运算法则;讨论了完备格上基于t算子的对偶三角模剩余蕴涵及其相互转化关系;在讨论完备格上基于t算子的直觉模糊集的对偶三角模TS隶属度和非隶属度表示的基础上,给出了完备格上基于t算子的直觉模糊集对应的剩余蕴涵之隶属度和非隶属度计算公式;最后,在定义完备格上基于t算子相似关系的基础上,定义和刻画了完备格上基于t算子的直觉模糊粗糙集模型.  相似文献   

4.
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。  相似文献   

5.
首先提出了伪伴随对的概念,基于此给出了基于一类蕴涵算子或带参数的蕴涵算子的FMP三I算法的统一形式;然后给出了基于两族蕴涵算子的三I算法的具体表达式;最后进一步给出了基于一类蕴涵算子或带参数的蕴涵算子α-FMP三I算法的统一形式.  相似文献   

6.
基于Vague集的一类蕴涵算子   总被引:1,自引:0,他引:1  
介绍了采用Fuzzy集进行近似推理的一些蕴涵算子的性质,根据Vague集的直觉特性提出了采用Vague集实现近似推理的一类蕴涵算子的构造方法,并根据Vague集的模糊熵对上述蕴涵算子的特性进行了解释。  相似文献   

7.
当值格为有界格时,借助广义子格的定义,给出模糊蕴含算子的一种新的延拓方法。证明了这种新的延拓方法能够保持模糊蕴涵算子的大多数基本性质,同时研究了其它一些性质得以保持的条件。  相似文献   

8.
验证了15个有可能存在伴随对的模糊蕴涵算子的保存在交性质,结果表明它们都满足保存在交性质.求出了这15个模糊蕴涵算子的伴随对,得到了14个模糊蕴涵算子.给出了一种构造模糊蕴涵算子的方法,并求出了在这种构造方法下,由46个模糊蕴涵算子构造得到的模糊蕴涵算子及这46个模糊蕴涵算子的圈乘算子,共构造出89个模糊蕴涵算子.  相似文献   

9.
在(U,N)-蕴涵的基础上,从经典蕴涵算子p→q=?p∨q的对偶形式p→q=?(p∧?q)出发,用合取一致模U取代?(p∧?q)中的∧运算,用一般模糊否定N取代?(p∧?q)中的?运算,生成了一类新的模糊蕴涵,称为(N,U)-蕴涵。(N,U)-蕴涵是一类不同于(U,N)-蕴涵的蕴涵算子,与(U,N)-蕴涵形成了互补,丰富了蕴涵算子的生成方法。  相似文献   

10.
将全蕴涵思想应用于基于L-模糊集的推理问题(其中L是一完备格),建立α-多Ⅰ算法的计算公式,并基于一类广泛的蕴涵算子讨论相应的多Ⅰ算法的还原性问题. 最后,作为多Ⅰ算法的应用,解决一类多准则决策问题.  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.
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   

13.
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   

14.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

15.
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   

16.
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   

17.
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。  相似文献   

18.
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   

19.
20.
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  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号