Piecewise linear reliability data analysis with fuzzy sets

2001 ◽  
Vol 215 (9) ◽  
pp. 1075-1082 ◽  
Author(s):  
J Harris
Keyword(s):  
Data Analysis ◽  
Fuzzy Sets ◽  
Piecewise Linear ◽  
Reliability Function ◽  
Graphical Analysis ◽  
Reliability Data ◽  
Knowledge Based ◽  
Form Part ◽  
Rate Functions ◽  
Insight Into

The Weibull three-parameter model is widely used in the analysis of reliability data, since it provides a good fit to many, but not all, data cases. In this work an analysis is presented in which locally constant hazard rate functions are applied in the analysis. By defining concomitant fuzzy reliability functions as overlapping fuzzy sets, the limited ranges may be conjoined to provide an extensive continuous reliability function. The efficacy of this treatment is tested with three different typical cases of published physical data that were previously the subjects of Weibull graphical analysis. It is found that in each case the treatment is effective. Different phases of the failure pattern of each case are identified and characterized by ‘time’ constants. The treatment is not limited to three parameters, as in the Weibull case, and it is therefore more flexible. It provides a deeper insight into the underlying failure mechanisms and may be expected to provide a wider range of applications, both within reliability data analysis and in other fields, and can form part of a knowledge-based system.

Innovation Management In The Knowledge-Based Society

2014 ◽  
Vol 1 (1) ◽  
pp. 227-232
Author(s):  
Ioan Moise Achim ◽  
Teodora Popescu ◽  
Manuella Kadar
Keyword(s):  
Innovation Management ◽  
Systemic Approach ◽  
Modern World ◽  
Research Development ◽  
Global Level ◽  
National Innovation Systems ◽  
Knowledge Based ◽  
Research And Innovation ◽  
Insight Into ◽  
Innovation Policies

AbstractThe aim of this paper is to offer an insight into innovation management in the knowledge-based society. It sets off by explaining the concept of knowledge-based society and why it bears relevance for the modern world. Next, innovation and related concepts are introduced. Furthermore, a presentation of National Innovation Systems (NIS) is made, their history and role in the understanding of a systemic approach to research, development and innovation at both national and global level. Next, the OECD main guidelines for the elaboration of national innovation policies are presented. Last but not least, an analysis of the current situation of research and innovation in Romania is also included.

scholarly journals Modeling of a Real-Life Industrial Reactor for Hydrogenation of Benzene Process

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 412
Author(s):  
Mirosław K. Szukiewicz ◽  
Krzysztof Kaczmarski
Keyword(s):  
Catalyst Activity ◽  
Real Life ◽  
Operating Conditions ◽  
Reactor Operation ◽  
Reactor Model ◽  
High Scale ◽  
Industrial Reactor ◽  
Knowledge Based ◽  
Operation Conditions ◽  
Insight Into

A dynamic model of the hydrogenation of benzene to cyclohexane reaction in a real-life industrial reactor is elaborated. Transformations of the model leading to satisfactory results are presented and discussed. Operating conditions accepted in the simulations are identical to those observed in the chemical plant. Under those conditions, some components of the reaction mixture vanish, and the diffusion coefficients of the components vary along the reactor (they are strongly concentration-dependent). We came up with a final reactor model predicting with reasonable accuracy the reaction mixture’s outlet composition and temperature profile throughout the process. Additionally, the model enables the anticipation of catalyst activity and the remaining deactivated catalyst lifetime. Conclusions concerning reactor operation conditions resulting from the simulations are presented as well. Since the model provides deep insight into the process of simulating, it allows us to make knowledge-based decisions. It should be pointed out that improvements in the process run, related to operating conditions, or catalyst application, or both on account of the high scale of the process and its expected growth, will remarkably influence both the profits and environmental protection.

scholarly journals Preparing to Take the Field: A Temporal Exploration of Stress, Emotion, and Coping in Elite Cricket

2016 ◽  
Vol 30 (2) ◽  
pp. 101-112 ◽  
Author(s):  
Adam James Miles ◽  
Rich Neil ◽  
Jamie Barker
Keyword(s):  
Data Analysis ◽  
Coping Strategies ◽  
Relational Theory ◽  
Semistructured Interviews ◽  
And Behaviors ◽  
And Coping ◽  
Insight Into

The purpose of this study was to explore the stress, emotion, and coping (SEC) experiences of elite cricketers leading up to and on the day of their first competitive fixture of the season. Four elite male cricketers (M = 21.25, SD = 1.5) completed Stress and Emotion Diaries (SEDs) for the 7-day period leading up to and on the day of their first competitive fixture of the season. We then interviewed the cricketers to explore the content of the SEDs in more detail. We used semistructured interviews to glean insight into the stressors, cognitions, emotions, coping strategies, and behaviors. Inductive and deductive content data analysis provided a holistic and temporal exploration of the SEC process underpinned by the cognitive-motivational-relational theory of emotions (Lazarus, 1999). The results highlighted the ongoing and continuous nature of the SEC process while illustrating the coping strategies the cricketers used leading up to and on the day of competition.

scholarly journals The Delimitation of Bipolar Metropolitan Area Within the Kujawsko-Pomorskie Region

2014 ◽  
Vol 5 (2) ◽  
pp. 101-122 ◽  
Author(s):  
Mirosław Biczkowski ◽  
Iwona Müller-Frączek ◽  
Joanna Muszyńska ◽  
Michał Bernard Pietrzak ◽  
Justyna Wilk
Keyword(s):  
Data Analysis ◽  
Regional Development ◽  
Metropolitan Area ◽  
Multivariate Data Analysis ◽  
Metropolitan Areas ◽  
Linear Arrangement ◽  
Knowledge Based ◽  
Knowledge Based Economy ◽  
Development Levels ◽  
Dual Core

The objective of the article was to re-define the bipolar metropolitan area within the area of the Kujawsko-Pomorskie region (NUTS 2). Concentration of metropolitan features, as well as socio-economic situations of its communes (NUTS 5) in 2011, and also the dynamics of communes’ development in the period 2009-2011 were considered in the procedure of delimitation. Bydgoszcz and Toruń, as the economically strongest cities in the region, were established as the dual core of the bipolar metropolitan area. It was assumed that the determined metropolitan area would cover the best developed and the fastest developing communes which met the following criteria of a metropolitan area: neighbourhood, continuity, compactness, maximum distance and population. The development levels of the communes were determined with the use of synthetic measure. Its values were calculated considering the economic (e.g. the amount of income) and also social (e.g. unemployment) aspects of regional development, as well as features typical of metropolitan areas, such as: well-developed sectors of R&D, knowledge-based economy and serving superior services. In the research, linear arrangement methods classifying as taxonomic tools of multivariate data analysis was applied. The metropolitan area resulting from the research (BipOM) slightly differs from the Bydgoszcz-Toruń Metropolitan Area (B-TOM) which was formally appointed in 2005 and composed all of the communes located within the area of the Bydgoski and Toruński districts (NUTS 4). Chełmża and Koronowo, as the less developed communes of the districts, were excluded from the new metropolitan area, while the communes of Ciechocinek, Nakło and Unisław, belonging to the neighbouring districts of the region, were included in the BipOM due to their significant level of regional development and its dynamics. Furthermore the Inowrocław district (bordered on the BipOM) was identified as the prospective candidate for the BipOM, due to the fact that its communes demonstrate a high potential for regional development.

scholarly journals Epistemic Matrices In The Construction Of Knowledge On Learning in Organizations

2020 ◽  
Vol 21 (3) ◽  
pp. 255-281
Author(s):  
Daniela Giareta Durante ◽  
Antonio Carlos Coelho
Keyword(s):  
Data Analysis ◽  
Qualitative Data ◽  
Graduate Programs ◽  
Analysis Software ◽  
Closed Curves ◽  
Construction Of Knowledge ◽  
Knowledge Based ◽  
The Creation ◽  
Qualitative Data Analysis Software ◽  
Sociological Approaches

Our critical epistemic review examines how researchers deal with the creation of knowledge regarding learning in organizations from the standpoint of cognitive interests. We adopted the epistemic matrices’ analytical model elaborated by Paes de Paula (2016), who handles the creation of knowledge based on cognitive interests and epistemic reconstruction, as an alternative to the paradigms of Burrel and Morgan (1979). The object of analysis were dissertations defended in Brazilian stricto sensu graduate programs in Administration. The identification of cognitive interests in the dissertations was based on sociological approaches classified by the circle of epistemic matrices, which encompasses pure sociological approaches and sets of overlapping closed curves, forming hybrid sociological approaches. The latent and clear content of sociological approaches were collected and analyzed using the qualitative data analysis software Atlas.ti 7. We conclude that the technical and practical interests guide the creation of knowledge regarding learning in organizations – putting aside the emancipatory interest in our discussions. We also conclude that, in order to make contributions for the advancement of knowledge, our study must go beyond the aggregation of cognitive interests; it is necessary to investigate the postulates of sociological approaches to which the interests are connected.

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