基于区间数的多级模糊优选模型

以区间数表示模糊集的相对隶属度，引入相对优势度对区间数的大小进行比较，建立一个多级模糊优选模型，解决了由于相对隶属度求解方法不同而导致方案优选中评价结果不一致的问题．     

模糊优选模型在机械制造工艺方案优选中的应用

由于传统的模糊综合评判模型依赖于隶属度的确定,而隶属度的确定往往带有较强的主观性,使得评判结果有时难以让人信服。为了解决这个问题,大连理工大学的陈守煜教授提出了相对隶属度的概念,并在此基础上建立模糊优选模型。本文将多层次模糊优选模型应用于机械制造工艺方案的优选中,取得了较为满意的结果。     

系统模糊优选理论在投资项目决策中的应用

从相对隶属度的概念出发,结合投资项目决策的特点,提出一种多目标系统模糊优选方法,建立了决策模型.该模型具有较好的通用性和可操作性,可供决策者参考.     

滑坡位移曲线模糊相似优选

在考虑岩土工程的随机性和模糊性的基础上．将模糊优选理论应用于滑坡位移曲线模型的选取,提出了滑坡位移曲线的模糊相似优选方法．选取若干典型滑坡位移模型作为参选曲线,利用实测数据对所选模型进行拟合解算,求得各模型参数;然后选取若干特征点构成参选曲线指标特征值向量．取相应的观测值作为标准相似曲线的指标特征值向量,求出参选曲线与实测曲线相似的相对隶属度向量,并选其中相对隶属度最大的参选曲线模型为最佳的边坡位移曲线模型．对参选曲线指标相对隶属度和指标权重的确定提出了新的见解,并给出了相应的计算公式．     

基于两级模糊识别的桥型方案优选模型

根据桥型设计方案资料,对包含定性指标的桥型方案进行客观评价。以马洋大桥设计方案为研究案例,根据两级模糊识别原理,提出定性指标相对隶属度确定方法,采用多目标最大距离法计算指标权重,建立基于两级模糊识别的桥型方案优选模型。优选结果为矮塔斜拉桥方案,符合客观实际。     

相对隶属度理论及其在地下水水质评价中应用

论述了相对隶属度理论及该理论应用于模糊评价的基本原理和方法，包括相对隶属度函数的建立；模糊识别目标函数的建立和由该目标函数进行的模糊模式识别模型推导：模糊评价矩阵生成以及级别特征值评价法。结合地下水水质评价应用实例，分析了该理论用于模糊评价的特点和实用性，结论是用该理论求得的相对隶属度使评价对象因素之间具有很好的可比性，其模糊识别模型具有清晰的数学和物理意义，所使用的级别特征值评价法能更好的反映评价对象的特征。因此，用相对隶属度理论进行模糊评价更具实用性。     

基于相对隶属度的模糊信息的多目标决策法

针对模糊信息的多目标决策问题,基于模糊集理论,首先,将决策者的主观偏好信息所隐含的目标权重通过一个线性规划模型计算出来。其次,借助每一方案与最优、最劣方案的综合加权距离,求得每个方案相对与最优方案的相对隶属度,提出了基于相对隶属度的模糊信息的多目标决策的相对隶属度法对方案进行择优和排序。最后,通过算例说明方法的可行性和实用性。     

模糊聚类迭代模型在洪水灾害度划分中应用

介绍了陈守煜的模糊聚类迭代模型.利用该模型的计算结果可对聚类样本作进一步的排序.即先求各个类对模糊划分的相对隶属度,以此相对隶属度为权重,根据各聚类样本对各类以相对隶属度加权,求得样本对模糊概念的类别特征值,并根据其大小对聚类样本进行排序.将其应用于"96.7"洪水灾害分析,较清晰地划分出了各受灾地受灾程度的轻重.     

系统模糊优选理论解水电站最优排序

太文从系统分析,模糊分析的基本概念出发,提出模糊优选隶属度公式,模糊优序理论与模型,用以求解水电站的最优开发程序,且可用于其他领域的方案优选与最优排序。     

相对隶属度与两级模糊识别模型及其在水工评价中应用

根据辩证唯物论关于差异与共维、中介和两极的观点,详细论述了模糊性、模糊概念、相对隶属度、相对隶属度函敬等相对隶属度理论。以该理论为基础建立了两级模糊模式识别模型,讨论了该模型的3个性质,水工坝体实测性态评价的具体应用实例证明,该模型有清晰的物理意义。     

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.     

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.     

A computer generator for randomly layered structures

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

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。     

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     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.