Search results

1 – 10 of over 6000
Article
Publication date: 9 December 2020

Wei Meng, Qian Li, Bo Zeng and Yingjie Yang

The purpose of this paper is to unify the expression of fractional grey accumulating generation operator and the reducing generation operator, and build the FDGM(1,1…

Abstract

Purpose

The purpose of this paper is to unify the expression of fractional grey accumulating generation operator and the reducing generation operator, and build the FDGM(1,1) model with the unified fractional grey generation operator.

Design/methodology/approach

By systematically studying the properties of the fractional accumulating operator and the reducing operator, and analyzing the sensitivity of the order value, a unified expression of the fractional operators is given. The FDGM(1,1) model with the unified fractional grey generation operator is established. The relationship between the order value and the modeling error distribution is studied.

Findings

The expression of the fractional accumulating generation operator and the reducing generation operator can be unified to a simple expression. For −1<r < 1, the fractional grey generation operator satisfies the principle of new information priority. The DGM(1,1) model is a special case of the FDGM(1,1) model with r = 1.

Research limitations/implications

The sensitivity of the unified operator is verified through random numerical simulation method, and the theoretical proof was not yet possible.

Practical implications

The FDGM(1,1) model has a higher modeling accuracy and modeling adaptability than the DGM(1,1) by optimizing the order.

Originality/value

The expression of the fractional accumulating generation operator and the reducing generation operator is firstly unified. The FDGM(1,1) model with the unified fractional grey generation operator is firstly established. The unification of the fractional accumulating operator and the reducing operator improved the theoretical basis of grey generation operator.

Details

Grey Systems: Theory and Application, vol. 11 no. 3
Type: Research Article
ISSN: 2043-9377

Keywords

Article
Publication date: 13 April 2021

Shuliang Li, Ke Gong, Bo Zeng, Wenhao Zhou, Zhouyi Zhang, Aixing Li and Li Zhang

The purpose of this paper is to overcome the weakness of the traditional model, in which the grey action quantity is a real number and thus leads to a “unique solution”…

Abstract

Purpose

The purpose of this paper is to overcome the weakness of the traditional model, in which the grey action quantity is a real number and thus leads to a “unique solution” and to build the model with a trapezoidal possibility degree function.

Design/methodology/approach

Using the system input and output block diagram of the model, the interval grey action quantity is restored under the condition of insufficient system influencing factors, and the trapezoidal possibility degree function is formed. Based on that, a new model able to output non-unique solutions is constructed.

Findings

The model satisfies the non-unique solution principle of the grey theory under the condition of insufficient information. The model is compatible with the traditional model in structure and modelling results. The validity and practicability of the new model are verified by applying it in simulating the ecological environment water consumption in the Yangtze River basin.

Practical implications

In this study, the interval grey number form of grey action quantity is restored under the condition of insufficient system influencing factors, and the unique solution to the problem of the traditional model is solved. It is of great value in enriching the theoretical system of grey prediction models.

Social implications

Taking power consumption as an example, the accurate prediction of the future power consumption level is related to the utilization efficiency of the power infrastructure investment. If the prediction of the power consumption level is too low, it will lead to the insufficient construction of the power infrastructure and the frequent occurrence of “power shortage” in the power industry. If the prediction is too high, it will lead to excessive investment in the power infrastructure. As a result, the overall surplus of power supply will lead to relatively low operation efficiency. Therefore, building an appropriate model for the correct interval prediction is a better way to solve such problems. The model proposed in this study is an effective one to solve such problems.

Originality/value

A new grey prediction model with its interval grey action quantity based on the trapezoidal possibility degree function is proposed for the first time.

Details

Grey Systems: Theory and Application, vol. 12 no. 2
Type: Research Article
ISSN: 2043-9377

Keywords

Article
Publication date: 6 January 2012

Getaneh Alemu, Brett Stevens and Penny Ross

With the aim of developing a conceptual framework which aims to facilitate semantic metadata interoperability, this paper explores overarching conceptual issues on how…

2883

Abstract

Purpose

With the aim of developing a conceptual framework which aims to facilitate semantic metadata interoperability, this paper explores overarching conceptual issues on how traditional library information organisation schemes such as online public access catalogues (OPACs), taxonomies, thesauri, and ontologies on the one hand versus Web 2.0 technologies such as social tagging (folksonomies) can be harnessed to provide users with satisfying experiences.

Design/methodology/approach

This paper reviews works in relation to current metadata creation, utilisation and interoperability approaches, focusing on how a social constructivist philosophical perspective can be employed to underpin metadata decisions in digital libraries. Articles are retrieved from databases such as EBSCO host and Emerald and online magazines such as D‐Lib and Ariadne. Books, news articles and blog posts that are deemed relevant are also used to support the arguments put forward in this paper.

Findings

Current metadata approaches are deeply authoritative and metadata deployments in digital libraries tend to favour an objectivist approach with focus on metadata simplicity. It is argued that unless information objects are enriched with metadata generated through a collaborative and user‐driven approach, achieving semantic metadata interoperability in digital libraries will remain difficult.

Practical implications

In this paper, it is indicated that the number of metadata elements (fields) constituting a standard has a direct bearing on metadata richness, which in turn directly affects semantic interoperability. It is expected that this paper will contribute towards a better understanding of harnessing user‐driven metadata.

Originality/value

As suggested in this paper, a conceptual metadata framework underpinned by a social constructivist approach substantially contributes to semantic interoperability in digital libraries.

Details

New Library World, vol. 113 no. 1/2
Type: Research Article
ISSN: 0307-4803

Keywords

Book part
Publication date: 8 July 2013

Alan Poulter

This chapter covers the significant developments in subject access embodied in the Functional Requirements (FR) family of models, particularly the Functional Requirements…

Abstract

Purpose

This chapter covers the significant developments in subject access embodied in the Functional Requirements (FR) family of models, particularly the Functional Requirements for Subject Authority Data (FRSAD) model.

Design/methodology/approach

A structured literature review was used to track the genesis of FRSAD. It builds on work by Pino Buizza and Mauro Guerrini who outlined a potential subject access model for FRBR. Tom Delsey, the author of Resource Description and Access (RDA), also examined the problem of adding subject access.

Findings

FRSAD seemed to generate little comment when it appeared in 2009, despite its subject model which departed from that in previous FR standards. FRSAD proposed a subject model based on “thema” and “nomen,” whereby the former, defined as “any entity used as the subject of a work,” was represented by the latter, defined as “any sign or sequence of signs.” It is suggested in this chapter that the linguistic classification theory underlying the PRECIS Indexing System might provide an alternative model for developing generic subject entities in FRSAD.

Originality/value

The FR family of models underpin RDA, the new cataloguing code intended to replace AACR2.Thus issues with FRSAD, which are still unresolved, continue to affect the new generation of cataloguing rules and their supporting models.

Details

New Directions in Information Organization
Type: Book
ISBN: 978-1-78190-559-3

Book part
Publication date: 19 April 2017

Pino G. Audia and Fiona Kun Yao

We study the spatial diffusion of stock backdating, an instance of corporate misconduct about which public information was virtually absent until 2005. Contrary to the…

Abstract

We study the spatial diffusion of stock backdating, an instance of corporate misconduct about which public information was virtually absent until 2005. Contrary to the findings of Bizjack, Lemmon, and Whitby (2009), our results reveal that this “invisible” practice did not diffuse through board interlocks. Rather, stock backdating spread through geographic proximity: firms were more likely to backdate stock options to the extent that other firms located geographically close to them had done so. Lending support to the importance of localized interactions among members of the local business elite, the effect of geographical proximity was conditional on high levels of local board interlocks. Our findings regarding the differential impact of geographic proximity and board interlocks on the diffusion of this invisible practice are analogous to the diffusion pattern of controversial practices proposed by Davis and Greve (1997).

Details

Geography, Location, and Strategy
Type: Book
ISBN: 978-1-78714-276-3

Keywords

Article
Publication date: 4 January 2021

Kaihe Shi and Lifeng Wu

The proposed model can emphasize the priority of new information and can extract messages from the first pair of original data. The comparison results show that the…

Abstract

Purpose

The proposed model can emphasize the priority of new information and can extract messages from the first pair of original data. The comparison results show that the proposed model can improve the traditional grey model.

Design/methodology/approach

The grey multivariate model with fractional Hausdorff derivative is firstly put forward to enhance the forecasting accuracy of traditional grey model.

Findings

The proposed model is used to predict the air quality composite index (AQCI) in ten cities respectively.

Originality/value

The effect of population density on AQCI in cities with poor air quality is not as significant as that of the cities with better air quality.

Details

Kybernetes, vol. 50 no. 11
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 26 March 2021

Ceri Binding, Claudio Gnoli and Douglas Tudhope

The Integrative Levels Classification (ILC) is a comprehensive “freely faceted” knowledge organization system not previously expressed as SKOS (Simple Knowledge…

Abstract

Purpose

The Integrative Levels Classification (ILC) is a comprehensive “freely faceted” knowledge organization system not previously expressed as SKOS (Simple Knowledge Organization System). This paper reports and reflects on work converting the ILC to SKOS representation.

Design/methodology/approach

The design of the ILC representation and the various steps in the conversion to SKOS are described and located within the context of previous work considering the representation of complex classification schemes in SKOS. Various issues and trade-offs emerging from the conversion are discussed. The conversion implementation employed the STELETO transformation tool.

Findings

The ILC conversion captures some of the ILC facet structure by a limited extension beyond the SKOS standard. SPARQL examples illustrate how this extension could be used to create faceted, compound descriptors when indexing or cataloguing. Basic query patterns are provided that might underpin search systems. Possible routes for reducing complexity are discussed.

Originality/value

Complex classification schemes, such as the ILC, have features which are not straight forward to represent in SKOS and which extend beyond the functionality of the SKOS standard. The ILC's facet indicators are modelled as rdf:Property sub-hierarchies that accompany the SKOS RDF statements. The ILC's top-level fundamental facet relationships are modelled by extensions of the associative relationship – specialised sub-properties of skos:related. An approach for representing faceted compound descriptions in ILC and other faceted classification schemes is proposed.

Details

Journal of Documentation, vol. 77 no. 4
Type: Research Article
ISSN: 0022-0418

Keywords

Article
Publication date: 6 April 2012

Shu‐jiun Chen and Hsueh‐hua Chen

The study aims to investigate, through mapping analysis, the operation of knowledge organization systems (KOS) in different languages (English and Chinese), the types of…

Abstract

Purpose

The study aims to investigate, through mapping analysis, the operation of knowledge organization systems (KOS) in different languages (English and Chinese), the types of term equivalence and the degree of similarity between different conceptual structures, and issues related thereto.

Design/methodology/approach

Terms are selected from the Art & Architecture Thesaurus developed by Getty Research Institute in the USA (source language) and the National Palace Museum in Taiwan participating in Taiwan e‐Learning and Digital Archives Program (target language). In respect of data analysis, mapping analysis and content analysis are both adopted.

Findings

Among the six types of term equivalence, “exact equivalence” appears most frequently. The degree of similarity between different conceptual structures can be divided into four types: similar structure, transferring part of the structure of source language into the system of target language by modeling; similar structure, but the structure of source language needs to be expanded or revised; dissimilar structure, the term in target language can be partially mapped to the term in source language; lack of structure, no matches between target language and source language.

Practical implications

The next step is to develop a more comprehensive conceptual structure that can incorporate multicultural perspectives. If the “partial equivalence” terms are further identified as important concepts, the problems of non‐exact equivalence terms and dissimilar conceptual structures can be solved by addressing the needs of English users in searching for Chinese art collections.

Originality/value

The study serves as a pilot study applicable to the development of multilingual KOS in the domain of Chinese fine arts, building the first demonstration model for the interoperability of KOS in Chinese and English.

Details

The Electronic Library, vol. 30 no. 2
Type: Research Article
ISSN: 0264-0473

Keywords

Article
Publication date: 20 July 2012

Thomas Zschocke

This paper aims to address the issue of matching controlled vocabulary on agroforestry from knowledge organization systems (KOS) and incorporating these terms in DITA…

Abstract

Purpose

This paper aims to address the issue of matching controlled vocabulary on agroforestry from knowledge organization systems (KOS) and incorporating these terms in DITA markup. The paper has been selected for an extended version from MTSR'11.

Design/methodology/approach

After a general description of the steps taken to harmonize controlled vocabulary on agroforestry, a general discussion of related work enriching documents and matching controlled vocabularies as well as details on managing controlled vocabulary in DITA are provided.

Findings

The paper identifies a number of practical and theoretical issues in matching controlled vocabulary from different sources, e.g. the complexity of addressing inconsistencies and incompatibilities between systems, and came across a number of approaches to semantically enrich documents, such as semantic‐document approach, facet classification, and integrating metadata and markup in documents.

Practical implications

Ways of incorporating controlled vocabularies into DITA markup are presented that can be drawn upon to guide future work in this area.

Originality/value

No previous work has reflected on the actual experience used to enrich DITA markup, especially with reference to the agrorestry domain.

Details

Program, vol. 46 no. 3
Type: Research Article
ISSN: 0033-0337

Keywords

Article
Publication date: 8 July 2010

Libo Eric Si, Ann O'Brien and Steve Probets

The paper aims to develop a prototype middleware framework between different terminology resources in order to provide a subject cross‐browsing service for library portal systems.

Abstract

Purpose

The paper aims to develop a prototype middleware framework between different terminology resources in order to provide a subject cross‐browsing service for library portal systems.

Design/methodology/approach

Nine terminology experts were interviewed to collect appropriate knowledge to support the development of a theoretical framework for the research. Based on this, a simplified software‐based prototype system was constructed incorporating the knowledge acquired. The prototype involved mappings between the computer science schedule of the Dewey Decimal Classification (which acted as a spine) and two controlled vocabularies, UKAT and ACM Computing Classification. Subsequently, six further experts in the field were invited to evaluate the prototype system and provide feedback to improve the framework.

Findings

The major findings showed that, given the large variety of terminology resources distributed throughout the web, the proposed middleware service is essential to integrate technically and semantically the different terminology resources in order to facilitate subject cross‐browsing. A set of recommendations are also made, outlining the important approaches and features that support such a cross‐browsing middleware service.

Originality/value

Cross‐browsing features are lacking in current library portal meta‐search systems. Users are therefore deprived of this valuable retrieval provision. This research investigated the case for such a system and developed a prototype to fill this gap.

Details

Aslib Proceedings, vol. 62 no. 4/5
Type: Research Article
ISSN: 0001-253X

Keywords

1 – 10 of over 6000