Scientia Iranica最新文献

An efficient biogas-base tri-generation of power, heating and cooling integrating inverted Brayton and ejector transcritical CO2 cycles: exergoeconomic evaluation 将倒置布雷顿循环和喷射器跨临界二氧化碳循环融为一体的高效沼气发电、供热和制冷三联供系统：能源经济评估

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-10 DOI: 10.24200/sci.2024.61064.7127

Ali Akbar Darabadi Zare, F. Mohammadkhani, M. Yari

引用次数: 0

A New Approach to Estimating Destinations in Open Automated Fare Collection Systems based on errors-against-errors strategy 基于误差对误差策略的开放式自动收费系统目的地估算新方法

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-10 DOI: 10.24200/sci.2024.61695.7445

Mostafa Shafaati, Mahmoud Saffarzadeh

{"title":"A New Approach to Estimating Destinations in Open Automated Fare Collection Systems based on errors-against-errors strategy","authors":"Mostafa Shafaati, Mahmoud Saffarzadeh","doi":"10.24200/sci.2024.61695.7445","DOIUrl":"https://doi.org/10.24200/sci.2024.61695.7445","url":null,"abstract":"10 In transit systems, automatic fare collection systems (AFCs) are widely used. Passengers are 11 often required to use their smart cards only when entering stops, so their destination is 12 unknown. Methods have been proposed for addressing the problem, but most of those require 13 network-level AFC data. The problem remains unresolved when only one line's AFC data is 14 available. This paper tries to solve this issue for specific applications, like crowding-related 15 problems such as calculating perceived travel times. In our method, rather than minimizing 16 errors, the model is constructed so that desirable errors are produced to counter undesirable 17 errors. The task is accomplished by employing an imbalanced binary class classification 18 based on thresholding for each stop. A classification indicates whether a passenger is 19 alighting or has already alighted at the study or previous stops. Although the model may 20 produce incorrect predictions for a particular stop, it will be adjusted to make a deliberate 21 error: for every incorrect prediction of alighting, there will be a few incorrect predictions of 22 not alighting. Using this technique, we estimate how many passengers are on board the bus. 23 Our model has the functionality of an Automatic Passenger Counting (APC) system when 24 the line does not have one. 25","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141835366","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}

引用次数: 0

Shared autonomous vehicle with pooled service, a modal shift approach 共享自动驾驶汽车与集合服务，一种模式转换方法

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-10 DOI: 10.24200/sci.2024.61845.7558

Mahsa Aboutorabi Kashani, A. Mamdoohi, Mohammadhossein Abbasi

{"title":"Shared autonomous vehicle with pooled service, a modal shift approach","authors":"Mahsa Aboutorabi Kashani, A. Mamdoohi, Mohammadhossein Abbasi","doi":"10.24200/sci.2024.61845.7558","DOIUrl":"https://doi.org/10.24200/sci.2024.61845.7558","url":null,"abstract":"9 Dependence on private cars has led to numerous problems, where AVs could be a potential 10 solution. Pooled service, however, could be a much bigger step towards sustainable transportation. 11 This paper presents a modal shift analysis emphasizing socio-economic, travel characteristics and 12 their interaction for a sample of private car users in Tehran. A stated preference survey was 13 designed in 2021 exclusively for the research purposes, and 491 valid questionnaires were 14 gathered. One of the main contributions is considering the impact of the number of persons in 15 shared autonomous vehicle with pooled service (SAVWPS). Estimation results of discrete choice 16 model reveal that, high-income respondents, owning a personal car and being a man decrease the 17 likelihood of modal shift to SAVWPS. A negative impact is also observed for travel time, travel 18 cost, waiting time and number of persons in SAVWPS. A significant systematic heterogeneity is 19 observed in the interaction effect of travel time and dissatisfied respondents with internet taxis due 20 to the pandemic. Considering this taste variation, a lower travel time in SAVs could increase the 21 modal shift likelihood among these travelers. The findings could help transportation decision-22 makers identify the factors affecting modal shift to SAVWPS to achieve a more sustainable 23 transportation system.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141835514","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}

引用次数: 0

Numerical study of slip and Magnetohydrodynamics (MHD) in calendering process using non-Newtonian fluid 使用非牛顿流体的压延工艺中的滑移和磁流体力学（MHD）数值研究

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-10 DOI: 10.24200/sci.2024.62522.7888

M. A. Javed, U. Shehzadi, A. Sowayan, H. M. Atif, M. Nazeer, Sami Ullah, Khan

{"title":"Numerical study of slip and Magnetohydrodynamics (MHD) in calendering process using non-Newtonian fluid","authors":"M. A. Javed, U. Shehzadi, A. Sowayan, H. M. Atif, M. Nazeer, Sami Ullah, Khan","doi":"10.24200/sci.2024.62522.7888","DOIUrl":"https://doi.org/10.24200/sci.2024.62522.7888","url":null,"abstract":"In this study, calendering process of an Oldroyd 4-constant model with the non-linear slip condition is presented. The fundamental laws are used to formulate the flow equations and then are simplified under lubrication approximation theory. We introduced the stream function to eradicate the pressure gradient and then numerically solved the final equations using the \"bvp4c method\" to determine the stream function and velocity profiles. The pressure gradient, pressure, and mechanical quantities of calendering operations are computed using the Runge-Kutta 4 th -order approach. Using a variety of graphs, it is discussed how the slip, Hartmann number, and material parameters of an Oldroyd 4-constant fluid affect the velocity, pressure gradient, and other associated characteristics of calendering. The results reveal that on comparing to the no-slip situation, the pressure distribution inside the calender and the length of contact decreases with increasing slip parameter values. On the other hand, the Hartmann number is responsible to enhance pressure. Furthermore, a reduction is observed in final sheet thickness with increases the values of the slip parameter ( Kn ). The force and power are the decreasing function of 1  , conversely, these quantities increase with enhancing the values of leave off distance (  ).","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141835730","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}

引用次数: 0

Analysis of waves subjected to mechanical force and voids source in an initially stressed magneto-elastic medium with corrugated and impedance boundary 带波纹和阻抗边界的初始受力磁弹性介质中受机械力和空隙源影响的波分析

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-10 DOI: 10.24200/sci.2024.62816.8044

A. I. Anya

{"title":"Analysis of waves subjected to mechanical force and voids source in an initially stressed magneto-elastic medium with corrugated and impedance boundary","authors":"A. I. Anya","doi":"10.24200/sci.2024.62816.8044","DOIUrl":"https://doi.org/10.24200/sci.2024.62816.8044","url":null,"abstract":"The analysis of surface waves in an initially stressed homogeneous magneto-elastic material with voids source, corrugated and impedance boundary conditions influenced by an applied mechanical force on the surface of the material is the hallmark of this investigation. The framework of the study also encompasses the use of normal mode solution approach, non-dimensionalization of the resulting equations of motion and grooved boundary conditions occasioned by the modeled problem. The distribution of the displacement components, normal and shear stresses, volume fraction fields were analytically and graphically presented using Mathematica Software for a particular chosen material which hitherto demonstrates the effects of the contributing physical quantities on the material. The initial stress, voids source, and Mechanical force have remarkable effects to the behavior of the distribution profiles on the material. Increased influences of the magnetic fields decrease the amplitude of the distribution functions whereas impedance parameter induced a mechanical like resistance to the distributions. Thus, this work should prove useful in understanding studies involving seismology. Also, researchers in the fields of Geophysics, Mathematics of waves, Material Sciences, amongst others should be able to find the work helpful.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141835638","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}

引用次数: 0

The Tenacity of Generalized Petersen Graphs 广义彼得森图的韧性

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-02 DOI: 10.24200/sci.2024.64036.8720

A. Khoshnood, D. Moazzami, A. Ghodousian

引用次数: 0

Highly Miniaturized Triple Band Classical Patch Shaped Antenna for WLAN and WiMAX Applications 适用于 WLAN 和 WiMAX 应用的高度微型化三频经典贴片天线

IF 1.4 4区工程技术

Scientia Iranica Pub Date : 2024-07-02 DOI: 10.24200/sci.2024.64204.8802

Kayhan Çelik

引用次数: 0

Design and Modeling of an Axial Flux Permanent Magnet Consequent Pole Machine 轴向磁通永磁连极机的设计与建模