Rivista e Edizione

Volume 47 (2022): Edizione 2 (June 2022)

Volume 47 (2022): Edizione 1 (February 2022)

Volume 46 (2021): Edizione 4 (December 2021)

Volume 46 (2021): Edizione 3 (September 2021)

Volume 46 (2021): Edizione 2 (June 2021)

Volume 46 (2021): Edizione 1 (March 2021)

Volume 45 (2020): Edizione 4 (December 2020)

Volume 45 (2020): Edizione 3 (September 2020)

Volume 45 (2020): Edizione 2 (June 2020)

Volume 45 (2020): Edizione 1 (March 2020)

Volume 44 (2019): Edizione 4 (December 2019)

Volume 44 (2019): Edizione 3 (September 2019)

Volume 44 (2019): Edizione 2 (June 2019)

Volume 44 (2019): Edizione 1 (March 2019)

Volume 43 (2018): Edizione 4 (December 2018)

Volume 43 (2018): Edizione 3 (September 2018)

Volume 43 (2018): Edizione 2 (June 2018)

Volume 43 (2018): Edizione 1 (March 2018)

Volume 42 (2017): Edizione 4 (December 2017)

Volume 42 (2017): Edizione 3 (September 2017)

Volume 42 (2017): Edizione 2 (June 2017)

Volume 42 (2017): Edizione 1 (February 2017)

Volume 41 (2016): Edizione 4 (November 2016)

Volume 41 (2016): Edizione 3 (September 2016)

Volume 41 (2016): Edizione 2 (June 2016)

Volume 41 (2016): Edizione 1 (March 2016)

Volume 40 (2015): Edizione 4 (December 2015)

Volume 40 (2015): Edizione 3 (September 2015)

Volume 40 (2015): Edizione 2 (June 2015)

Volume 40 (2015): Edizione 1 (March 2015)

Volume 39 (2014): Edizione 4 (December 2014)

Volume 39 (2014): Edizione 3 (September 2014)

Volume 39 (2014): Edizione 2 (June 2014)

Volume 39 (2014): Edizione 1 (February 2014)

Volume 38 (2013): Edizione 4 (December 2013)

Volume 38 (2013): Edizione 3 (September 2013)

Volume 38 (2013): Edizione 2 (June 2013)

Volume 38 (2013): Edizione 1 (March 2013)

Volume 37 (2012): Edizione 4 (December 2012)

Volume 37 (2012): Edizione 3 (September 2012)

Volume 37 (2012): Edizione 2 (June 2012)

Volume 37 (2012): Edizione 1 (March 2012)

Dettagli della rivista
Formato
Rivista
eISSN
2300-3405
Pubblicato per la prima volta
24 Oct 2012
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

Volume 46 (2021): Edizione 1 (March 2021)

Dettagli della rivista
Formato
Rivista
eISSN
2300-3405
Pubblicato per la prima volta
24 Oct 2012
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

8 Articoli
Accesso libero

Editorial – Preface to the Special Issue on Numerical Techniques Meet with OR

Pubblicato online: 01 Mar 2021
Pagine: 3 - 10

Astratto

Abstract

This special issue of the Foundations of Computing and Decision Sciences, titled ”Numerical Techniques Meet with OR”, is devoted to the numerical techniques and their applications in real-world phenomena. The special issue and its editorial present numerical algorithms as they meet with different research topics such as, e.g., from operational research, supply chain management, geometrical structures and Covid-19 effects on financial applications. Besides, the special issue covers instructional information about numerical techniques which are useful for OR research problems and real-world applications on such issues.

Accesso libero

An Algorithm for Choosing, Ordering a New Criteria of a Bi-Objective Flow Problem

Pubblicato online: 01 Mar 2021
Pagine: 11 - 26

Astratto

Abstract

In this paper, we propose an algorithm which is based on many things: the notions well-known of the simplex network method, Ford Fulkerson’s algorithm and our new idea, which is << the gain cycles >>, applied on a bi-objective minimum cost flow problem. This algorithm permits us to have a good order of many criteria in a rapid and an efficient way; because this classification permits us to structure the optimal area, in which we can choose the best action among the others which exist in the objective space. From this one, we distinguish, that the resolution of this problem comes to find an under set of good actions, among which the decider can select an action of best compromise, or make a decision, in the case where reference indications of the deciders may change. A didactic example is done to illustrate our algorithm.

Parole chiave

  • Bi-objective minimum cost flow problem
  • Network flows
  • Network mathematical programming
  • Efficient extreme point
Accesso libero

An Integration of Neural Network and Shuffled Frog-Leaping Algorithm for CNC Machining Monitoring

Pubblicato online: 01 Mar 2021
Pagine: 27 - 42

Astratto

Abstract

This paper addresses Acoustic Emission (AE) from Computer Numerical Control (CNC) machining operations. Experimental measurements are performed on the CNC lathe sensors to provide the power consumption data. To this end, a hybrid methodology based on the integration of an Artificial Neural Network (ANN) and a Shuffled Frog-Leaping Algorithm (SFLA) is applied to the data resulting from these measurements for data fusion from the sensors which is called SFLA-ANN. The initial weights of ANN are selected using SFLA. The goal is to assess the potency of the signal periodic component among these sensors. The efficiency of the proposed SFLA-ANN method is analyzed compared to hybrid methodologies of Simulated Annealing (SA) algorithm and ANN (SA-ANN) and Genetic Algorithm (GA) and ANN (GA-ANN).

Parole chiave

  • Artificial Neural Network
  • Shuffled Frog-Leaping Algorithm
  • Simulated Annealing
  • Genetic Algorithm
  • CNC machining
  • Multi-sensor data fusion
Accesso libero

Using TeX Markup Language for 3D and 2D Geological Plotting

Pubblicato online: 01 Mar 2021
Pagine: 43 - 69

Astratto

Abstract

The paper presents technical application of TeX high-level, descriptive markup language for processing geological dataset from soil laboratory. Geotechnical measurements included equivalent soil cohesion, absolute and absolute deformation index, soil compressibility coefficient by time of immersion depth, exposure time to compressive strength to samples and physical and mechanical properties (humidity, density). Dataset was received from laboratory based experimental tests of the physical and mechanical properties of soils. Data were converted to csv table and processed by LaTeX. Methodology is based on LaTeX packages: {tikz}, {tikz-3dplot}, {tikzpicture}, {pgfplot}, {filecontetns}, {spy} for 3D plotting showing correlation in variables and descriptive statistical analysis based on the data array processing. Results demonstrated LaTeX scripts and graphics: 2D and 3D scatterplots, ternaries, bar charts, boxplots, zooming techniques detailing fragment of the plot, flowchart. Research novelty consists in technical approach of TeX language application for geo- logical data processing and graphical visualization. Engineering graphics by TeX was demonstrated with screenshots of the codes used for plotting.

Parole chiave

  • LaTeX
  • TeX
  • markup language
  • plotting
  • data visualization
  • data analysis
  • geotechnical modelling
  • soil compression
  • 3D modelling
  • 2D modelling
Accesso libero

Morgan-Voyce Polynomial Approach for Quaternionic Space Curves of Constant Width

Pubblicato online: 01 Mar 2021
Pagine: 71 - 83

Astratto

Abstract

The curves of constant width are special curves used in engineering, architecture and technology. In the literature, these curves are considered according to different roofs in different spaces and some integral characterizations of these curves are obtained. However, in order to examine the geometric properties of curves of constant width, more than characterization is required. In this study, firstly differential equations characterizing quaternionic space curves of constant width are obtained. Then, the approximate solutions of the differential equations obtained are calculated by the Morgan-Voyce polynomial approach.The geometric properties of this curve type are examined with the help of these solutions.

Parole chiave

  • curve of constant width
  • quaternionic space curve
  • Morgan-Voyce polynomial approach
Accesso libero

Revealed Comparative Advantage Method for Solving Multicriteria Decision-making Problems

Pubblicato online: 01 Mar 2021
Pagine: 85 - 96

Astratto

Abstract

This study proposes and analyzes a new method for the post-Pareto analysis of multicriteria decision-making (MCDM) problems: the revealed comparative advantage (RCA) assessment method. An interesting feature of the suggested method is that it uses the solution to a special eigenvalue problem and can be considered an analog/modification in the MCDM context of well-known ranking methods including the authority-hub method, PageRank method, and so on, which have been successfully applied to such fields as economics, bibliometrics, web search design, and so on. For illustrative purposes, this study discusses a particular MCDM problem to demonstrate the practicality of the method. The theoretical considerations and conducted calculations reveal that the RCA assessment method is self-consistent and easily implementable. Moreover, comparisons with well-known tools of an MCDM analysis shows that the results obtained using this method are appropriate and competitive. An important particularity of the RCA assessment method is that it can be useful for decision-makers in the case in which no decision-making authority is available or when the relative importance of various criteria has not been preliminarily evaluated.

Parole chiave

  • Decision-making problem
  • revealed comparative advantage
  • multicriteria optimization
Accesso libero

Investigation of E-Cigarette Smoking Model with Mittag-Leffler Kernel

Pubblicato online: 01 Mar 2021
Pagine: 97 - 109

Astratto

Abstract

Smoking is the most lethal social poisoning event. The World Health Organization defines smoking as the most important preventable cause of disease. Around 4.9 million people worldwide die from smoking every year. In order to analysis this matter, we aim to investigate an e-cigarette smoking model with Atangana-Baleanu fractional derivative. We obtain the existence conditions of the solution for this fractional model utilizing fixed-point theory. After giving existence conditions, the uniqueness of the solution is proved. Finally, to show the effect of the Atangana-Baleanu fractional derivative on the model, we give some numerical results supported by illustrative graphics.

Parole chiave

  • Atangana-Baleanu derivative
  • fixed point theory
  • e-cigarette smoking model
  • numerical method
Accesso libero

Understanding the Impact of COVID–19 on Global Financial Network Using Graph Based Algorithm: Minimum Spanning Tree Approach

Pubblicato online: 01 Mar 2021
Pagine: 111 - 123

Astratto

Abstract

In this paper effects of COVID–19 pandemic on stock market network are analyzed by an application of operational research with a mathematical approach. For this purpose two minimum spanning trees for each time period namely before and during COVID–19 pandemic are constructed. Dynamic time warping algorithm is used to measure the similarity between each time series of the investigated stock markets. Then, clusters of investigated stock markets are constructed. Numerical values of the topology evaluation for each cluster and time period is computed.

Parole chiave

  • Big data
  • big data analysis
  • minimum spanning tree
  • COVID–19 pandemic
  • dynamic time warping
  • stock market
8 Articoli
Accesso libero

Editorial – Preface to the Special Issue on Numerical Techniques Meet with OR

Pubblicato online: 01 Mar 2021
Pagine: 3 - 10

Astratto

Abstract

This special issue of the Foundations of Computing and Decision Sciences, titled ”Numerical Techniques Meet with OR”, is devoted to the numerical techniques and their applications in real-world phenomena. The special issue and its editorial present numerical algorithms as they meet with different research topics such as, e.g., from operational research, supply chain management, geometrical structures and Covid-19 effects on financial applications. Besides, the special issue covers instructional information about numerical techniques which are useful for OR research problems and real-world applications on such issues.

Accesso libero

An Algorithm for Choosing, Ordering a New Criteria of a Bi-Objective Flow Problem

Pubblicato online: 01 Mar 2021
Pagine: 11 - 26

Astratto

Abstract

In this paper, we propose an algorithm which is based on many things: the notions well-known of the simplex network method, Ford Fulkerson’s algorithm and our new idea, which is << the gain cycles >>, applied on a bi-objective minimum cost flow problem. This algorithm permits us to have a good order of many criteria in a rapid and an efficient way; because this classification permits us to structure the optimal area, in which we can choose the best action among the others which exist in the objective space. From this one, we distinguish, that the resolution of this problem comes to find an under set of good actions, among which the decider can select an action of best compromise, or make a decision, in the case where reference indications of the deciders may change. A didactic example is done to illustrate our algorithm.

Parole chiave

  • Bi-objective minimum cost flow problem
  • Network flows
  • Network mathematical programming
  • Efficient extreme point
Accesso libero

An Integration of Neural Network and Shuffled Frog-Leaping Algorithm for CNC Machining Monitoring

Pubblicato online: 01 Mar 2021
Pagine: 27 - 42

Astratto

Abstract

This paper addresses Acoustic Emission (AE) from Computer Numerical Control (CNC) machining operations. Experimental measurements are performed on the CNC lathe sensors to provide the power consumption data. To this end, a hybrid methodology based on the integration of an Artificial Neural Network (ANN) and a Shuffled Frog-Leaping Algorithm (SFLA) is applied to the data resulting from these measurements for data fusion from the sensors which is called SFLA-ANN. The initial weights of ANN are selected using SFLA. The goal is to assess the potency of the signal periodic component among these sensors. The efficiency of the proposed SFLA-ANN method is analyzed compared to hybrid methodologies of Simulated Annealing (SA) algorithm and ANN (SA-ANN) and Genetic Algorithm (GA) and ANN (GA-ANN).

Parole chiave

  • Artificial Neural Network
  • Shuffled Frog-Leaping Algorithm
  • Simulated Annealing
  • Genetic Algorithm
  • CNC machining
  • Multi-sensor data fusion
Accesso libero

Using TeX Markup Language for 3D and 2D Geological Plotting

Pubblicato online: 01 Mar 2021
Pagine: 43 - 69

Astratto

Abstract

The paper presents technical application of TeX high-level, descriptive markup language for processing geological dataset from soil laboratory. Geotechnical measurements included equivalent soil cohesion, absolute and absolute deformation index, soil compressibility coefficient by time of immersion depth, exposure time to compressive strength to samples and physical and mechanical properties (humidity, density). Dataset was received from laboratory based experimental tests of the physical and mechanical properties of soils. Data were converted to csv table and processed by LaTeX. Methodology is based on LaTeX packages: {tikz}, {tikz-3dplot}, {tikzpicture}, {pgfplot}, {filecontetns}, {spy} for 3D plotting showing correlation in variables and descriptive statistical analysis based on the data array processing. Results demonstrated LaTeX scripts and graphics: 2D and 3D scatterplots, ternaries, bar charts, boxplots, zooming techniques detailing fragment of the plot, flowchart. Research novelty consists in technical approach of TeX language application for geo- logical data processing and graphical visualization. Engineering graphics by TeX was demonstrated with screenshots of the codes used for plotting.

Parole chiave

  • LaTeX
  • TeX
  • markup language
  • plotting
  • data visualization
  • data analysis
  • geotechnical modelling
  • soil compression
  • 3D modelling
  • 2D modelling
Accesso libero

Morgan-Voyce Polynomial Approach for Quaternionic Space Curves of Constant Width

Pubblicato online: 01 Mar 2021
Pagine: 71 - 83

Astratto

Abstract

The curves of constant width are special curves used in engineering, architecture and technology. In the literature, these curves are considered according to different roofs in different spaces and some integral characterizations of these curves are obtained. However, in order to examine the geometric properties of curves of constant width, more than characterization is required. In this study, firstly differential equations characterizing quaternionic space curves of constant width are obtained. Then, the approximate solutions of the differential equations obtained are calculated by the Morgan-Voyce polynomial approach.The geometric properties of this curve type are examined with the help of these solutions.

Parole chiave

  • curve of constant width
  • quaternionic space curve
  • Morgan-Voyce polynomial approach
Accesso libero

Revealed Comparative Advantage Method for Solving Multicriteria Decision-making Problems

Pubblicato online: 01 Mar 2021
Pagine: 85 - 96

Astratto

Abstract

This study proposes and analyzes a new method for the post-Pareto analysis of multicriteria decision-making (MCDM) problems: the revealed comparative advantage (RCA) assessment method. An interesting feature of the suggested method is that it uses the solution to a special eigenvalue problem and can be considered an analog/modification in the MCDM context of well-known ranking methods including the authority-hub method, PageRank method, and so on, which have been successfully applied to such fields as economics, bibliometrics, web search design, and so on. For illustrative purposes, this study discusses a particular MCDM problem to demonstrate the practicality of the method. The theoretical considerations and conducted calculations reveal that the RCA assessment method is self-consistent and easily implementable. Moreover, comparisons with well-known tools of an MCDM analysis shows that the results obtained using this method are appropriate and competitive. An important particularity of the RCA assessment method is that it can be useful for decision-makers in the case in which no decision-making authority is available or when the relative importance of various criteria has not been preliminarily evaluated.

Parole chiave

  • Decision-making problem
  • revealed comparative advantage
  • multicriteria optimization
Accesso libero

Investigation of E-Cigarette Smoking Model with Mittag-Leffler Kernel

Pubblicato online: 01 Mar 2021
Pagine: 97 - 109

Astratto

Abstract

Smoking is the most lethal social poisoning event. The World Health Organization defines smoking as the most important preventable cause of disease. Around 4.9 million people worldwide die from smoking every year. In order to analysis this matter, we aim to investigate an e-cigarette smoking model with Atangana-Baleanu fractional derivative. We obtain the existence conditions of the solution for this fractional model utilizing fixed-point theory. After giving existence conditions, the uniqueness of the solution is proved. Finally, to show the effect of the Atangana-Baleanu fractional derivative on the model, we give some numerical results supported by illustrative graphics.

Parole chiave

  • Atangana-Baleanu derivative
  • fixed point theory
  • e-cigarette smoking model
  • numerical method
Accesso libero

Understanding the Impact of COVID–19 on Global Financial Network Using Graph Based Algorithm: Minimum Spanning Tree Approach

Pubblicato online: 01 Mar 2021
Pagine: 111 - 123

Astratto

Abstract

In this paper effects of COVID–19 pandemic on stock market network are analyzed by an application of operational research with a mathematical approach. For this purpose two minimum spanning trees for each time period namely before and during COVID–19 pandemic are constructed. Dynamic time warping algorithm is used to measure the similarity between each time series of the investigated stock markets. Then, clusters of investigated stock markets are constructed. Numerical values of the topology evaluation for each cluster and time period is computed.

Parole chiave

  • Big data
  • big data analysis
  • minimum spanning tree
  • COVID–19 pandemic
  • dynamic time warping
  • stock market

Pianifica la tua conferenza remota con Sciendo