1,720,964 research outputs found
Z-numbers Based Hybrid MCDM Approach for Energy Resources Ranking and Selection
Get PDFEnergy resource selection is a multi-criteria decision-making task, and in most cases, it is characterized by uncertainties, information incompleteness,
and vagueness. In such circumstances, a group decision making and experts` opinion study are appropriate approaches for the problem solution. These
approaches allow to a considerable extent to compensate the deficiency of the relevant and reliable data on alternatives and decision-makers’ priorities.
In this paper fuzzy information and Z-numbers based MCDM models have been studied and used as a group decision-making tool for energy resources
ranking and selection. In order to make a well-founded and reliable decision and to get insights how methodological backgrounds of models used
are influencing results of evaluations, comparative study of applications of the outranking, distance-based and pairwise comparisons methods for the
same subject area is carried out and merits and demerits of each approach from a decision-makers’ point of view are evaluated. The availability of
solutions based on various approaches allows to decision-maker to select the more justified and consistent solution. A numerical example of energy
resources ranking and selection for Azerbaijan illustrates the efficiency of the integrated approach and comparative study
Fuzzy Information and Z-number-based Approaches to Energy Resource Selection
Get PDFIn this paper, we study models for ranking renewables and a mix of energy resources in the development of long-term energy policy. Energy resource
selection is a multi-criteria decision-making problem, characterized by incomplete information, uncertainties and intangibles, competitive priorities and
contradictory requirements. The uniqueness of the problem and the limited relevant data necessitates the use of expert opinion as a principal source of
information. All these factors contribute to subjectivity and vagueness in the decision-making process. Taking into consideration these circumstances,
fuzzy information and a Z-number-based analytic hierarchy process (AHP) has been used as a decision-making tool. Z–number represents both the
restriction and the reliability of evaluation and, due to these characteristics, it provides a better description of the uncertainty. Numerical examples
and comparative analysis of fuzzy and Z-number-based models illustrate the process to solution and results
An Integrated Approach for Renewable Energy Resource and Plant Location Selection
Get PDFRenewable energy resources ranking, and power plant location selection are multi-criteria decision-making (MCDM) problems. These problems can
be solved as two-phase decision-making tasks separately and sequentially or, in a unified form, as a single-step task. In this paper, we are studying the
efficiency and applicability of the unified approach based on fuzzy and Z-information, and TOPSIS technique. Alternatives for the single-step approach
are generated based on renewables available in the country and potential geographical locations for these resources. Considering the importance of
weights in MCDM and the multiplicity of approaches to criteria weighting, subjective, objective, AHP-based, and combination of the subjective and
objective weights are used for decision matrix weighting. Comparative analysis of the solutions, based on various weights, allows making a reliable
solution. The results of the study and problem solution confirm the efficiency and applicability of the combined approach. The advantage of the
unified single step solution is that this approach, in addition to the solution of the main task, provides to decision-maker additional information about
preferable next best renewable and location option as well
A Fuzzy Analitic Hierarchy Process (FAHP) Application for a Renewable election in Azerbaijan
Get PDFAzerbaijan is an energy-independent country and oil and gas resources are driving forces for the country economics. But heavy reliance on hydrocarbons has two serious implications: traditional energy systems are environmentally harmful; all non-renewable resources have a limited lifecycle of production. In such circumstances, the development of renewables-based energy systems is of interest for Azerbaijan as well. Geographical features of the country provide a list of the country-level available renewables: solar, wind and hydro resources. Renewables selection is a multicriteria decision-making process and requires a comprehensive study of the social, economic, technological and other specific aspects of renewable development. Like any other unique undertakings and innovation, it is characterized by insufficient information, uncertainties and intangibles, competitive priorities and contradictory decisions. The necessity to rely on experts` opinion also contributes to the subjectivity and vagueness of decision-making problem. Taking into consideration these circumstances, Fuzzy Analytic Hierarchy Process has been used. According to the research results, available renewables are ordered, in accordance with priority, as following: solar → wind → hydro. A high priority for the solar resource presumably related to its availability almost all around the country, technical solutions affordability and relatively low per unit cost. The hydro has limited geographical availability, relatively high investment cost and some negative implications for nature. The wind is in the intermediat
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
- …
