岩土工程随机—模糊可靠度的概念和方法

岩体最基本属性之一是其力学性质的随机——模糊性。针对这种情况,本文分析了岩土工程随机可靠度理论面临的问题,提出了岩土工程随机——模糊可靠度的概念和计算方法。这种方法将模糊数学原理引入确定性分析,实现模——精结合,既充分考虑了岩石的客观属性,又满足了对工程稳定性定量评价的需要。     

Imprecise (fuzzy) information in geostatistics

A methodology based on fuzzy set theory for the utilization of imprecise data in geostatistics is presented. A common problem preventing a broader use of geostatistics has been the insufficient amount of accurate measurement data. In certain cases, additional but uncertain (soft) information is available and can be encoded as subjective probabilities, and then the soft kriging method can be applied (Journel, 1986). In other cases, a fuzzy encoding of soft information may be more realistic and simplify the numerical calculations. Imprecise (fuzzy) spatial information on the possible variogram is integrated into a single variogram which is used in a fuzzy kriging procedure. The overall uncertainty of prediction is represented by the estimation variance and the calculated membership function for each kriged point. The methodology is applied to the permeability prediction of a soil liner for hazardous waste containment. The available number of hard measurement data (20) was not enough for a classical geostatistical analysis. An additional 20 soft data made it possible to prepare kriged contour maps using the fuzzy geostatistical procedure.This paper was presented at MGUS 87 Conference, Redwood City, California, 14 April 1987.     

模糊优先比在东北中强地震危险区判定中的应用

应用模糊数学中的模糊优先比方法，对东北地区未来地震危险进行判断。所得结果表明，在给定的５个地区中，吉林省的四平地区和内蒙古的布特哈旗地区的地震危险性最大，存在未来发生中强震的可能。     

应用模糊评判法预测延吉盆地含油气有利勘探区

应用模糊评判法，在对延吉盆地石油地质基本特征分析的基础上，选取地质、物化探多年数，利用对各参数的权重分配进行调整，确定最佳分配方法，对盆地各区块大拉子组合油气性进行综合评判，其结果验证了目前钻井的情况，进而预测了下一步钻探的有利区块。     

模系上Fuzzy矩阵的T直积及其应用

本文讨论了模系([0,1],S,T,N)上Fuzzy矩阵的T直积及其在解模系上的关系方程A⊕X⊕B=C和讨论TG逆中的应用。     

用模糊综合评判划分矿床的勘探类型

为了建立划分矿床勘探类型的定量模型,本文试用一组模糊数对划分勘探类型的各项定性因素进行定量化处理,并根据不同因素的状态特征建立相应的隶属函数。这样对于任何一个具体的矿床,都可以用该模型得到相应的模糊关系矩阵,最后通过模糊变换得出划分矿床勘探类型的综合评判结果。     

Basinwide flood control system by combining prediction and reservoir operation

Japan has traditionally performed flood prevention through the construction and use of dikes, storage reservoirs, and basins which are costly and time consuming options. Another non-structural option is to operate the flood control system appropriately with a view to reducing flood damage. In this paper, a flood control system combining the runoff prediction model in the whole river basin with the reservoir operation is discussed. Different models of the runoff process are introduced in order to compare their accuracies and the computational time for the flood forecasting system. The reservoir operational rule is formulated in terms of fuzzy inference theory. Historical data are applied in a case study for verification of the proposed theories.     

模糊聚类分析用于基于分形的影像纹理分类

利用模糊数学中的模糊聚类分析方法，通过计算和比较不同影像纹理空隙数据的相似系数ｒｉｊ来达到分类的目的。试验表明，此方法是有效可行的。     

GPS空间位置精度因子模糊分析

高精度测量是GPS的重要特性，但由于各种因素的存在，所有GPS测量信息都存在着一定的误差，这说明GPS的读数并不能准确代表目标的真实位置。本文提出一种为提高GPS测量精度的模糊分析，比较本方法与简单的点平均，并提供了在S／A存在与不存在不同时间的真实试验数据，证明了本方法能比简单的点平均提供更精确的位置信息。