Pub Date : 2023-07-18DOI: 10.24200/sci.2023.58193.5608
Ehsan Hassanzadeh, Zahra Amini
61 Predicting Origin-Destination demand has always been a challenging problem in transportation. 62 Conventional demand prediction methods mainly propose procedures for forecasting aggregated temporal 63 Origin-Destination (OD) flows. In other words, they are primarily unable to predict short-term demands. 64 Another limitation of these models is that they do not consider the impact of environmental conditions on 65 trip patterns. Furthermore, OD demand prediction requires two individual steps of modeling: trip 66 generation and trip distribution. This article presents a framework for predicting hourly OD flows using 67 the Neural Network. The proposed method utilizes trip patterns and environmental conditions for 68 predicting demands in single-step modeling. A case study on New York City Green Taxi 2018 trip data is 69 done to evaluate the method, and the results demonstrate that the network has reasonably accurate OD 70 flows predictions.
61 起点-目的地需求预测一直是交通领域的难题。62 传统的需求预测方法主要是提出预测时间性的起点-目的地（OD）总流量的程序。换言之，它们主要无法预测短期需求。64 这些模型的另一个局限是没有考虑环境条件对 65 行程模式的影响。此外，OD 需求预测需要两个单独的建模步骤：66 行程生成和行程分布。本文提出了一个利用 67 神经网络预测每小时 OD 流量的框架。所提出的方法利用了出行模式和环境条件，在单步建模中预测需求。为评估该方法，对纽约市绿色出租车 2018 年的出车数据进行了 69 案例研究，结果表明该网络能合理准确地预测 70 OD 流量。
{"title":"Using Neural Network for Predicting Hourly Origin-Destination Matrices from Trip Data and Environmental Information","authors":"Ehsan Hassanzadeh, Zahra Amini","doi":"10.24200/sci.2023.58193.5608","DOIUrl":"https://doi.org/10.24200/sci.2023.58193.5608","url":null,"abstract":"61 Predicting Origin-Destination demand has always been a challenging problem in transportation. 62 Conventional demand prediction methods mainly propose procedures for forecasting aggregated temporal 63 Origin-Destination (OD) flows. In other words, they are primarily unable to predict short-term demands. 64 Another limitation of these models is that they do not consider the impact of environmental conditions on 65 trip patterns. Furthermore, OD demand prediction requires two individual steps of modeling: trip 66 generation and trip distribution. This article presents a framework for predicting hourly OD flows using 67 the Neural Network. The proposed method utilizes trip patterns and environmental conditions for 68 predicting demands in single-step modeling. A case study on New York City Green Taxi 2018 trip data is 69 done to evaluate the method, and the results demonstrate that the network has reasonably accurate OD 70 flows predictions.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"77 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.24200/sci.2023.61034.7110
D. Bakhshesh, M. Farshi
For a real number 0 < γ < 180 ◦ , a geometric path P = ( p 1 , . . . , p n ) is called angle-monotone with width γ from p 1 to p n if there exists a closed wedge of angle γ such that every directed edge −−−−→ p i p i +1 of P lies inside the wedge whose apex is p i . A geometric graph G is called angle-monotone with width γ if for any two vertices p and q in G , there exists an angle-monotone path with width γ from p to q . In this paper, we show that for any integer k ≥ 1 and any i ∈ { 2 , 3 , 4 , 5 } , the theta-graph Θ 4 k + i on a set of points in convex position is angle-monotone with width 90 ◦ + iθ 4 , where θ = 360 ◦ 4 k + i . Moreover, we present two sets of points in the plane, one in convex position and the other in non-convex position, to show that for every 0 < γ < 180 ◦ , the graph Θ 4 is not angle-monotone with width γ . ,
对于实数 0 < γ < 180 ◦ ，如果存在一个角度为 γ 的封闭楔形，使得 P 的每条有向边 ----→ p i p i +1 都位于顶点为 p i 的楔形内，则从 p 1 到 p n 的几何路径 P = ( p 1 , ... , p n ) 称为宽度为 γ 的角单调路径。如果对于 G 中的任意两个顶点 p 和 q，存在一条宽度为 γ 的角单调路径从 p 到 q，则称几何图形 G 为宽度为 γ 的角单调图。在本文中，我们证明对于任意整数 k ≥ 1 和任意 i ∈ { 2 , 3 , 4 , 5 } ，θ 图 Θ 的宽度为 γ 。凸位置点集合上的θ图 Θ 4 k + i 是角度单调的，宽度为 90 ◦ + iθ 4，其中 θ = 360 ◦ 4 k + i 。此外，我们提出了平面上的两组点，一组处于凸位置，另一组处于非凸位置，以说明对于每 0 < γ < 180 ◦，图形 Θ 4 都不是宽度为 γ 的角单调图形。,
{"title":"Angle-monotonicity of theta-graphs for points in convex position","authors":"D. Bakhshesh, M. Farshi","doi":"10.24200/sci.2023.61034.7110","DOIUrl":"https://doi.org/10.24200/sci.2023.61034.7110","url":null,"abstract":"For a real number 0 < γ < 180 ◦ , a geometric path P = ( p 1 , . . . , p n ) is called angle-monotone with width γ from p 1 to p n if there exists a closed wedge of angle γ such that every directed edge −−−−→ p i p i +1 of P lies inside the wedge whose apex is p i . A geometric graph G is called angle-monotone with width γ if for any two vertices p and q in G , there exists an angle-monotone path with width γ from p to q . In this paper, we show that for any integer k ≥ 1 and any i ∈ { 2 , 3 , 4 , 5 } , the theta-graph Θ 4 k + i on a set of points in convex position is angle-monotone with width 90 ◦ + iθ 4 , where θ = 360 ◦ 4 k + i . Moreover, we present two sets of points in the plane, one in convex position and the other in non-convex position, to show that for every 0 < γ < 180 ◦ , the graph Θ 4 is not angle-monotone with width γ . ,","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"41 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.24200/sci.2023.61602.7395
M. Nalbant, S. Bağdatlı, A. Teki̇n
. Free vibration of stepped nanobeams was investigated using Eringen's nonlocal elasticity theory. Beam analysis is based on Bernoulli-Euler theory and nanoscale analysis is based on Eringen's nonlocal elasticity theory. The system boundary conditions were determined as simple-simple. The equations of motion of the system were obtained using Hamilton's principle. For the solution of the obtained state equations, a multi-time scale, which is one of the perturbation methods, was used. The results part of the study, it is aimed to observe the nano-size effect and the effects of the step state. For this purpose, the natural frequency values of the first three modes of the system were obtained for different non-local parameter values, step rates, and step positions. When the results were examined, it was determined that the non-local parameter value, step ratio, and natural frequency were inversely proportional to each other. In addition, to strengthen the accuracy of the results, the results obtained were compared with the results of other studies in the literature conducted under the specified conditions, and a perfect agreement was observed. The current beam model, on the other hand, could help design and manufacture ICs such as nano-sensors and nano-actuators.
{"title":"Free Vibrations Analysis of Stepped Nanobeams Using Nonlocal Elasticity Theory","authors":"M. Nalbant, S. Bağdatlı, A. Teki̇n","doi":"10.24200/sci.2023.61602.7395","DOIUrl":"https://doi.org/10.24200/sci.2023.61602.7395","url":null,"abstract":". Free vibration of stepped nanobeams was investigated using Eringen's nonlocal elasticity theory. Beam analysis is based on Bernoulli-Euler theory and nanoscale analysis is based on Eringen's nonlocal elasticity theory. The system boundary conditions were determined as simple-simple. The equations of motion of the system were obtained using Hamilton's principle. For the solution of the obtained state equations, a multi-time scale, which is one of the perturbation methods, was used. The results part of the study, it is aimed to observe the nano-size effect and the effects of the step state. For this purpose, the natural frequency values of the first three modes of the system were obtained for different non-local parameter values, step rates, and step positions. When the results were examined, it was determined that the non-local parameter value, step ratio, and natural frequency were inversely proportional to each other. In addition, to strengthen the accuracy of the results, the results obtained were compared with the results of other studies in the literature conducted under the specified conditions, and a perfect agreement was observed. The current beam model, on the other hand, could help design and manufacture ICs such as nano-sensors and nano-actuators.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"48 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.24200/sci.2023.60059.6574
N. Gupta, M. M. Kar, Arun Kumar Singh
In this article, for load frequency control(LFC) in power system an improved sine-cosine algorithm is proposed with 2-DOF-PID controller. To facilitate the inspection, a multi-area test system(three area) has been developed. Additionally, several physical restrictions have been taken into account while investigating practical power system analysis. For every scenario considered for the experiment, the suggested approach has been employed as the optimizer of parameter of the controller of LFC. 2-DOF-PID controllers has the ability to quickly reject disturbances without noticeably increasing overshoot in set point tracking, have been utilised as the controller of LFC. The PIDF and FOPID controllers has been compare with 2-DOF-PID controller to evaluate the usefulness of it. The simulation results of SCA, SSA, ALO, and PSO are some of the algorithm with which of the proposed modified algorithm were compared, in three distinct scenarios: disturbance in three areas, disturbance in two areas, and the final scenario with physical restrictions. Wilcoxon Sign Rank Test (WSRT) has been use for the statistical analysis and 20 separate times was carried out in order to further prove the supremacy of the suggested strategy.
{"title":"Statistical Analysis Based Load Frequency Control of multi-area system with Nonlinearities using 2-DOF-PID controller with Application of Improved Sine-Cosine Algorithm optimizer","authors":"N. Gupta, M. M. Kar, Arun Kumar Singh","doi":"10.24200/sci.2023.60059.6574","DOIUrl":"https://doi.org/10.24200/sci.2023.60059.6574","url":null,"abstract":"In this article, for load frequency control(LFC) in power system an improved sine-cosine algorithm is proposed with 2-DOF-PID controller. To facilitate the inspection, a multi-area test system(three area) has been developed. Additionally, several physical restrictions have been taken into account while investigating practical power system analysis. For every scenario considered for the experiment, the suggested approach has been employed as the optimizer of parameter of the controller of LFC. 2-DOF-PID controllers has the ability to quickly reject disturbances without noticeably increasing overshoot in set point tracking, have been utilised as the controller of LFC. The PIDF and FOPID controllers has been compare with 2-DOF-PID controller to evaluate the usefulness of it. The simulation results of SCA, SSA, ALO, and PSO are some of the algorithm with which of the proposed modified algorithm were compared, in three distinct scenarios: disturbance in three areas, disturbance in two areas, and the final scenario with physical restrictions. Wilcoxon Sign Rank Test (WSRT) has been use for the statistical analysis and 20 separate times was carried out in order to further prove the supremacy of the suggested strategy.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"40 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139357879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.24200/sci.2023.61637.7412
H. Sabahi, M. Vali, D. Shafie
9 Heart failure (HF) is a cardiac dysfunction disease with a high mortality rate that is mostly calculated via registry 10 data. The objective of this work was to predict in-hospital mortality in patients hospitalized with HF utilizing their 11 before-hospitalization registry data. The data include 3968 HF records extracted from Persian Registry Of cardio 12 Vascular diseasE (PROVE)/HF registry. We proposed a method that contains an imbalanced ensemble probabilistic 13 model which using registry data predicts HF patients who die during hospitalization from those who survive. The
{"title":"In-hospital mortality prediction model of heart failure patients using imbalanced registry data: A machine learning approach","authors":"H. Sabahi, M. Vali, D. Shafie","doi":"10.24200/sci.2023.61637.7412","DOIUrl":"https://doi.org/10.24200/sci.2023.61637.7412","url":null,"abstract":"9 Heart failure (HF) is a cardiac dysfunction disease with a high mortality rate that is mostly calculated via registry 10 data. The objective of this work was to predict in-hospital mortality in patients hospitalized with HF utilizing their 11 before-hospitalization registry data. The data include 3968 HF records extracted from Persian Registry Of cardio 12 Vascular diseasE (PROVE)/HF registry. We proposed a method that contains an imbalanced ensemble probabilistic 13 model which using registry data predicts HF patients who die during hospitalization from those who survive. The","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"51 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.24200/sci.2023.60251.6688
Mohammad Pourmehdi, Seyed Hossein Hosseinian-Kashani, M. Paydar, A. Divsalar
Agricultural activities have adverse effects on the environment by emitting greenhouse gases and consuming great deals of freshwater. In addition, fruits constitute a substantial part of agricultural products used for balancing diets. In particular, pomegranate is one of the most used products by people of different cultures. In this study, a multi-objective mathematical model was developed to balance sustainability dimensions by focusing on selecting the optimal cultivation process and determining the optimal material flows between pomegranate supply chain facilities. The proposed model maximizes the total profit and the number of created job opportunities due to cultivation process selection and the establishment of plants. It also addresses the environmental impacts by minimizing fertilizer, pesticide, and water consumption in pomegranate cultivation. The model also considers the reverse flow of pomegranate peel and seeds to recapture the value of these products, commonly known as waste. A real case in the Mazandaran province of Iran was considered for validating the developed model. Finally, comprehensive sensitivity analyses were performed on the influential factors of the problem, and managerial implications are presented.
{"title":"Sustainable pomegranate supply chain network design considering cultivation process and water consumption","authors":"Mohammad Pourmehdi, Seyed Hossein Hosseinian-Kashani, M. Paydar, A. Divsalar","doi":"10.24200/sci.2023.60251.6688","DOIUrl":"https://doi.org/10.24200/sci.2023.60251.6688","url":null,"abstract":"Agricultural activities have adverse effects on the environment by emitting greenhouse gases and consuming great deals of freshwater. In addition, fruits constitute a substantial part of agricultural products used for balancing diets. In particular, pomegranate is one of the most used products by people of different cultures. In this study, a multi-objective mathematical model was developed to balance sustainability dimensions by focusing on selecting the optimal cultivation process and determining the optimal material flows between pomegranate supply chain facilities. The proposed model maximizes the total profit and the number of created job opportunities due to cultivation process selection and the establishment of plants. It also addresses the environmental impacts by minimizing fertilizer, pesticide, and water consumption in pomegranate cultivation. The model also considers the reverse flow of pomegranate peel and seeds to recapture the value of these products, commonly known as waste. A real case in the Mazandaran province of Iran was considered for validating the developed model. Finally, comprehensive sensitivity analyses were performed on the influential factors of the problem, and managerial implications are presented.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"73 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-08DOI: 10.24200/sci.2023.57385.5213
G. Vishwakarma
In this manuscript, a generalized class of estimators has been developed for estimating a finite population means in ranked set sampling scheme. The expressions for bias and mean square error (MSE) of the proposed class of estimators have been derived up to the first order of approximation. Some estimators are shown to be a member of the proposed class. The proposed class of estimators has been compared through the MSE criterion over the other existing member estimators of the proposed class of estimators. The theoretical conditions are obtained under which the proposed class of estimators has performed better. Efficiency comparisons, empirical study, and simulation study also delineate the soundness of our proposed generalized class of the estimators under ranked
{"title":"Computing the population mean on the use of auxiliary information under ranked set sampling","authors":"G. Vishwakarma","doi":"10.24200/sci.2023.57385.5213","DOIUrl":"https://doi.org/10.24200/sci.2023.57385.5213","url":null,"abstract":"In this manuscript, a generalized class of estimators has been developed for estimating a finite population means in ranked set sampling scheme. The expressions for bias and mean square error (MSE) of the proposed class of estimators have been derived up to the first order of approximation. Some estimators are shown to be a member of the proposed class. The proposed class of estimators has been compared through the MSE criterion over the other existing member estimators of the proposed class of estimators. The theoretical conditions are obtained under which the proposed class of estimators has performed better. Efficiency comparisons, empirical study, and simulation study also delineate the soundness of our proposed generalized class of the estimators under ranked","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"32 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77719106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-08DOI: 10.24200/sci.2023.60984.7089
F. Raji, M. Kazemeini
Advances in nanotechnology have made it possible to produce minimal tools and equipment that can be used to control tiny volumes of fluids. Currently, at the center of attention of scientists in various fields, such systems are referred to as microfluidic systems. Also, the ability to synthesize nanoparticles with precise control over the particle's form and size is crucial. The primary goal of this research was to see if the nozzle-focused microchannels could have been used to synthesize the Polycaprolactone (PCL) polymer nanoparticles through the COMSOL Multiphysics 5.4 software medium. In this study, the velocity and static pressure of the droplet after leaving the nozzle and entering the main channel, as well as the size, shape, distribution, and weight of the droplet in terms of the time step, were understudied. It was revealed that the channel's design allowed the droplets to keep their steady structure at its conclusion. Finally, it was shown that the droplet possessed a dual functionality of place and time in terms of size and weight distribution after a time step of 0.00305 seconds. The maximum drop saturation mass was formed, and the droplet diameter size displayed a plateau after 0.01 seconds.
{"title":"Effects of the microchannel shape upon droplet formations during synthesis of nanoparticles","authors":"F. Raji, M. Kazemeini","doi":"10.24200/sci.2023.60984.7089","DOIUrl":"https://doi.org/10.24200/sci.2023.60984.7089","url":null,"abstract":"Advances in nanotechnology have made it possible to produce minimal tools and equipment that can be used to control tiny volumes of fluids. Currently, at the center of attention of scientists in various fields, such systems are referred to as microfluidic systems. Also, the ability to synthesize nanoparticles with precise control over the particle's form and size is crucial. The primary goal of this research was to see if the nozzle-focused microchannels could have been used to synthesize the Polycaprolactone (PCL) polymer nanoparticles through the COMSOL Multiphysics 5.4 software medium. In this study, the velocity and static pressure of the droplet after leaving the nozzle and entering the main channel, as well as the size, shape, distribution, and weight of the droplet in terms of the time step, were understudied. It was revealed that the channel's design allowed the droplets to keep their steady structure at its conclusion. Finally, it was shown that the droplet possessed a dual functionality of place and time in terms of size and weight distribution after a time step of 0.00305 seconds. The maximum drop saturation mass was formed, and the droplet diameter size displayed a plateau after 0.01 seconds.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"12 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84622603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-08DOI: 10.24200/sci.2023.59428.6239
Saeed Shahdoust, M. Fallah, S. E. Najafi
The design of a problem involving a sustainable integrated production system under uncertainty are covered in this article. The presented model aims to create an integrated production system that will lower costs across the board and greenhouse gas emissions. The robust-fuzzy-probabilistic (RFP) optimization method is used to control the non-deterministic parameters of the problem. The model's exact solution yielded calculation results that demonstrate that as greenhouse gas emissions have decreased, the production system's costs have increased as a result of changes in the number of machines and their technological capabilities. The outcome also demonstrates that as the uncertainty rate rises, the production system's level of demand also rises, which results in a rise in production. Costs and greenhouse gas emissions rise as a result of this increase in production. Additionally, the findings demonstrate that raising the average recycling rate improves the production system's stability. Because this is an NP-hard issue, many different optimization strategies have been tried, including the multi objective grey wolf optimizer (MOGWO) and the Non-dominated Sorting Genetic II (NSGA II). looking at the numerical examples of various sizes reveals that these algorithms have near-optimal solutions much more quickly and with much higher efficiency than the exact method.
{"title":"A robust-fuzzy-probabilistic optimization model for the multi-objective problem of a sustainable green integrated production system under uncertainty","authors":"Saeed Shahdoust, M. Fallah, S. E. Najafi","doi":"10.24200/sci.2023.59428.6239","DOIUrl":"https://doi.org/10.24200/sci.2023.59428.6239","url":null,"abstract":"The design of a problem involving a sustainable integrated production system under uncertainty are covered in this article. The presented model aims to create an integrated production system that will lower costs across the board and greenhouse gas emissions. The robust-fuzzy-probabilistic (RFP) optimization method is used to control the non-deterministic parameters of the problem. The model's exact solution yielded calculation results that demonstrate that as greenhouse gas emissions have decreased, the production system's costs have increased as a result of changes in the number of machines and their technological capabilities. The outcome also demonstrates that as the uncertainty rate rises, the production system's level of demand also rises, which results in a rise in production. Costs and greenhouse gas emissions rise as a result of this increase in production. Additionally, the findings demonstrate that raising the average recycling rate improves the production system's stability. Because this is an NP-hard issue, many different optimization strategies have been tried, including the multi objective grey wolf optimizer (MOGWO) and the Non-dominated Sorting Genetic II (NSGA II). looking at the numerical examples of various sizes reveals that these algorithms have near-optimal solutions much more quickly and with much higher efficiency than the exact method.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"113 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73422872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-08DOI: 10.24200/sci.2023.60105.6594
W. Khan, N. Anjum, A. Hobiny, Mehboob Ali
: Nanofluids show greater heat transfer rate and characteristics of mechanical friction diminution using nano-sized hard elements to fluid. Moreover, regarding the working of heat transfer fluid, nanofluid is widely used in areas of refrigeration, shipping, automobile, chemical industry, energy, electronics, air conditioning, computer, and many other areas to cope heat transference issues. The aforesaid utilizations motivated us to encounter entropy generation aspects for Sutterby nanofluid flow configured by permeable surface. Moreover, well-known Buongiorno's model capturing same attributes of Brownian and thermophoretic-diffusions is presented for modeling and investigation. Additionally, (MHD) as well as thermal radiation effects are the part of current work. Here, we have also considered the viscous dissipation aspects. Similarity variable are used to decrease set of nonlinear PDEs into set of ODEs then resolved numerically by using bvp4c algorithm, besides the pertinent parameters are addressed graphically. The physical aspect of fluid flow, temperature, concentration for variation of involved parameters is explained with the help of graphs.
{"title":"Entropy generation analysis for chemically reactive flow of Sutterby nanofluid considering radiation aspects","authors":"W. Khan, N. Anjum, A. Hobiny, Mehboob Ali","doi":"10.24200/sci.2023.60105.6594","DOIUrl":"https://doi.org/10.24200/sci.2023.60105.6594","url":null,"abstract":": Nanofluids show greater heat transfer rate and characteristics of mechanical friction diminution using nano-sized hard elements to fluid. Moreover, regarding the working of heat transfer fluid, nanofluid is widely used in areas of refrigeration, shipping, automobile, chemical industry, energy, electronics, air conditioning, computer, and many other areas to cope heat transference issues. The aforesaid utilizations motivated us to encounter entropy generation aspects for Sutterby nanofluid flow configured by permeable surface. Moreover, well-known Buongiorno's model capturing same attributes of Brownian and thermophoretic-diffusions is presented for modeling and investigation. Additionally, (MHD) as well as thermal radiation effects are the part of current work. Here, we have also considered the viscous dissipation aspects. Similarity variable are used to decrease set of nonlinear PDEs into set of ODEs then resolved numerically by using bvp4c algorithm, besides the pertinent parameters are addressed graphically. The physical aspect of fluid flow, temperature, concentration for variation of involved parameters is explained with the help of graphs.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81297322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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