Information Extraction from Text – Dealing with Imprecise Data

Burhan, Iman Mohammed

doi:10.5772/7223

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Bearing in mind how long it is since type-2 fuzzy sets were first proposed by Zadeh (1975), their use remains restricted (Mendel, 2007a). Nevertheless, they have been successfully used in several applications, such as: Controllers (Sepúlveda et al, 2012;Chaoui et al, 2013), industrial applications (Dereli et al, 2011), data mining (Turksen and Celikyilmaz, 2010), image processing and pattern recognition (Melin, 2012;Mitchell, 2005) and in a predictive model for financial applications (Bernardo et al, 2013). In terms of approaches to construction of the membership functions, in the majority of the studies each author develops functions employing the available knowledge (which is dependent on the domain of the application), heuristically or with the help of experts.…”

Section: Methods For Generation Of Type-2 Membership Functionsmentioning

confidence: 99%

Automatic Methods for Generation of Type-1 and Interval Type-2 Fuzzy Membership Functions

Schwaab¹,

Nassar²,

Filho³

2015

Journal of Computer Science

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Generation of membership functions is an important step in construction of fuzzy systems. Since membership functions reflect what is known about the variables involved in a problem, when they are correctly modeled the system will behave in the manner that is expected in the context of the problem being addressed. Since their creation, type-1 membership functions have been used in domains characterized by uncertainty. Nevertheless, use of type-2 membership functions has been expanding over recent years because they are considered more appropriate for this application. Both types of membership function can be generated with the aid of automatic methods that implement generation of membership functions from data. These methods are convenient for situations in which it is not possible to obtain all the information needed from an expert or when the problem in question is complex. The aim of this study is to present a review of the most important automatic methods for generation of membership functions, both type 1 and interval type-2, highlighting the principal characteristics of each approach.

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Section: Methods For Generation Of Type-2 Membership Functionsmentioning

confidence: 99%

Automatic Methods for Generation of Type-1 and Interval Type-2 Fuzzy Membership Functions

Schwaab¹,

Nassar²,

Filho³

2015

Journal of Computer Science

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Comparative Evaluation of Water Resource Data Policy Inventories Towards the Improvement of East African Climate and Water Data Infrastructure

Garibay

Gitau

Kongo³

et al. 2022

Water Resour Manage

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The recognized challenge of freely accessing climate and water data in East Africa poses a problem in undertaking relevant analytical studies and making informed water resources management decisions in the region. This study seeks to understand the defining characteristics of policies and distribution infrastructure, in the context of meteorological, water quantity, and water quality data, that determine whether or not a user will be able to freely and readily access existing data. An analysis was developed to quantify the information contained in legislation, official documents and websites, and similar textual resources from the study region and elsewhere to establish commonalities, potential trends, and patterns in the documentation behind data streams culminating successfully in a portal or database accessible by the public. A quantitative analysis was applied to discern overall patterns in what constitutes effective policy and to diagnose where there may be impediments in the path between data collection and its application. Generally, the foundational elements present in the documentation pertaining to most accessible data streams represented are: (1) known organization in charge of that data type; (2) known location where this data would be stored; (3) defined data collection format; and (4) commitment to a plan for making data available to potential users. Examination of overlap between elements absent in unsuccessful data streams and present in successful data streams suggests that those without a documented commitment to making data available online rarely result in a functioning, accessible portal and vice versa. Amongst other findings, this knowledge has the potential to contribute towards the development and refinement of policies so that more emphasis is placed on openness and access, leading to informed decision-making and management of water resources.

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Information Extraction from Text – Dealing with Imprecise Data

Cited by 2 publications

References 27 publications

Automatic Methods for Generation of Type-1 and Interval Type-2 Fuzzy Membership Functions

Automatic Methods for Generation of Type-1 and Interval Type-2 Fuzzy Membership Functions

Comparative Evaluation of Water Resource Data Policy Inventories Towards the Improvement of East African Climate and Water Data Infrastructure

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