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3rd International Virtual Vonference of Chemistry, IVCC 2021

作者： Bakiri, Zahir Department of Chemical Engineering Ferhat Abbas University of Setif-1 19000 Algeria Department of Chemical Engineering Salah Boubnider Constantine 3 University Constantine Algeria

The study of secondary settler modelling, which aims to establish the main model (one-dimensional-1D model), which is involved in some fundamental processes of the hydrodynamic behaviour of this liquid / solid separation unit and to engender variations of the sludge blanket height as a function of the operating parameters and maintaining of the municipal wastewater treatment plant of Setif. The objective of this research is focused on solid/liquid separation in the secondary settler by attempting a mathematical model that allows us to evaluate the sedimentation velocity as a function of the sludge settleability parameters. © 2021 Institute of Physics Publishing. All rights reserved.

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Capturing mathematical and human perceptions of shape and form through machine learning 23

Capturing mathematical and human perceptions of shape and fo...

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23rd International conference on engineering Design, ICED 2021

作者： Gopsill, James Goudswaard, Mark Jones, David Hicks, Ben Design Manufacturing Futures Lab School of Civil Aerospace and Mechanical Engineering University of Bristol United Kingdom Centre for Modelling and Simulation Bristol United Kingdom

Classifying shape and form is a core feature of engineering Design and one that we do this instinctively on a daily basis. Matching similar components to then reduce unique component counts, determining whether a competitors design infringes on copyright and receiving market feedback on product styling are all examples where shape and form comes into play. However, shape and form can be perceived in different ways from purely mathematical (e.g. shape grammars) to wholly subjective (e.g. market feedback) and these perceptions may not entirely agree. This paper examines the mathematical and human perceptions of shape and form through a study of classifying shapes that have been interpolated between one another, and in doing so, highlights the disparity in perceptions. Following this, the paper demonstrates how the emergent field of Machine Learning can be applied to capture mathematical and human perceptions of shape and form resulting in a means to twin this feedback into product development. © ICED *** right reserved.

关键词： Machine learning

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modelling and simulation of an active damped structure

Modelling and simulation of an active damped structure

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15th International Carpathian Control conference, ICCC 2014

作者： Šuránek, Pavel Mahdal, Miroslav Tůma, Jiří Faculty of Mechanical Engineering VSB - Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781479935284

Paper describes the creation of mathematical model for active damped mechanical structure. The model is consisting of differential equations for structure's motion and an equation of the control loop. This model is used to design and examination the control loop algorithm and for testing the behaviour of the whole system before applying it on the real structure. © 2014 IEEE.

关键词： Equations of motion

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modelling and outcome analysis of a competitive environment – A probabilistic approach

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Journal of King Saud University - engineering Sciences 2021年第2期33卷 111-118页

作者： Sreerag, C. Srinivas, M.N. Murty, A.V.S.N. Department of Manufacturing School of Mechanical Engineering Vellore Institute of Technology VelloreTamilnadu India Department of Mathematics School of Advanced Sciences Vellore Institute of Technology VelloreTamilnadu India

Competition is one of the underlining phenomena in the world that has been continuously deforming the life and history of human beings, animals, plants and even microorganisms. The results of different competitions are fascinating from explanation of evolution to the dramatic industrial revolution. The article proposes a mathematical model to estimate the outcome probability of different competitors in a competition system on account of the number of failure gates associated. The article includes special cases like the tournament model considering the number of failure gates which are likely at various levels of competition. The study additionally gives the idea of identical probability curves on account of eight member competitions which is highly relevant in strategy and decision making process and there by sustainability of an individual competitor gets ensured. The concept of identical probability utilised here will help to understand the different scenarios in a competitive environment, with similar chance for occurrence. The model developed will definitely be a more practically relevant substitute for conventional probabilistic tools, including Bayesian approaches and whilst the character of considering bulk of competitors all together, enabling the model itself to find further extensions in the dimension of modern game theory as well. The time-dependent behaviour of number of failure gate envisaged provides more practical scope for the mathematical model presented. The model is applicable to analyse the trust related issues in supply chain with huge number of suppliers participating and also in the areas of decision making in the field of industrial management and completion science as a whole. © 2020 The Authors

关键词： Supply chains

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modelling and validation of Proton exchange membrane fuel cell (PEMFC)

Modelling and validation of Proton exchange membrane fuel ce...

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International conference on Advances in Manufacturing and Materials engineering (ICAMME)

作者： Mohiuddin, A. K. M. Basran, N. Khan, A. A. IIUM Dept Mech Engn Jalan Gombak Kuala Lumpur 53100 Malaysia IIUM Dept Mfg & Mat Engn Jalan Gombak Kuala Lumpur 53100 Malaysia

This paper is the outcome of a small scale fuel cell project. Fuel cell is an electrochemical device that converts energy from chemical reaction to electrical work. Proton Exchange Membrane Fuel Cell (PEMFC) is one of the different types of fuel cell, which is more efficient, having low operational temperature and fast start up capability results in high energy density. In this study, a mathematical model of 1.2 W PEMFC is developed and simulated using MATLAB software. This model describes the PEMFC behaviour under steady-state condition. This mathematical modeling of PEMFC determines the polarization curve, power generated, and the efficiency of the fuel cell. Simulation results were validated by comparing with experimental results obtained from the test of a single PEMFC with a 3 V motor. The performance of experimental PEMFC is little lower compared to simulated PEMFC, however both results were found in good agreement. Experiments on hydrogen flow rate also been conducted to obtain the amount of hydrogen consumed to produce electrical work on PEMFC.

关键词： MATLAB

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Multiple Characterisation modelling of Friction Stir Welding Using a Genetic Multi-objective Data-driven Fuzzy modelling Approach

Multiple Characterisation Modelling of Friction Stir Welding...

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IEEE International conference on Fuzzy Systems (FUZZ 2011)

作者： Zhang, Qian Mahfouf, Mahdi Panoutsos, George Beamish, Kathryn Norris, Ian Univ Sheffield Dept Automat Control & Syst Engn Sheffield S Yorkshire England TWI Ltd Cambridge England

ISBN: (纸本)9781424473175

Friction Stir Welding (FSW) is a relatively new solid-state joining technique, which is versatile, environment friendly, and energy and time efficient. For a comprehensive understanding of the effects of process conditions, such as tool rotation speed and traverse speed, on characterisations of welded materials, it is essential to establish prediction models for different aspects of the materials' behaviours. Because of the high complexity of the FSW process, it is often difficult to derive accurate and yet transparent enough mathematical models. In such a situation, a systematic data-driven fuzzy modelling approach is developed and implemented in this paper to model FSW behaviour relating to AA5083 aluminium alloy, consisting of microstructural features, mechanical properties, as well as overall weld quality. This methodology allows constructing transparent fuzzy models considering both accuracy and interpretability attributes of fuzzy systems. The elicited models proved to be accurate, interpretable and robust and can be further applied to facilitate the optimal design of process parameters, with the aim of finding the optimal combinations of process parameters to achieve desired welding properties.

关键词： friction stir welding aluminium alloy mechanical property microstructure weld quality fuzzy modelling multi-objective NSGA-II

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A Web-Based Tool for Collaborative modelling and Analysis in human-Computer Interaction and Cognitive Science 10th

A Web-Based Tool for Collaborative Modelling and Analysis ...

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10th International Symposium on From Data Models and Back, DataMod 2021, held as a satellite event of the 19th International conference on Software engineering and Formal Methods, SEFM 2021

作者： Cerone, Antonio Mengdigali, Anel Nabiyeva, Nuray Nurbay, Temirlan Department of Computer Science School of Engineering and Digital Sciences Nazarbayev University Astana Kazakhstan

ISBN: (纸本)9783031160103

human-computer interaction and cognitive science are interdisciplinary areas in which computer scientists and mathematicians often work together with social scientists, such as psychologists and sociologists, as well as with more focussed practitioners such as usability experts and system analysts. In order to work effectively, interdisciplinary teams need to agree on a common communication language as a compromise between the computer scientists and mathematicians’ formal modelling approach and the conceptual models normally used by social scientists for describing their domain-related theories and frameworks. Moreover, even when proper communication is established within a specific research team, the next challenge is the presentation of the result to a heterogeneous international community, to allow for cross-fertilisation, exchanges of ideas, sharing of models, results and data, work replication and review. This tool paper presents ColMASC, a web-based tool and portal for the collaborative modelling and analysis of human cognition and behaviour as well as interactive systems. ColMASC aim is for researchers in human-computer interaction and cognitive science to freely use the tool provided by the web portal in order to collaborate in the development of models of computer/physical systems as well as human behaviour, run in silico experiments, compare the results of in silico experiments and experiments with human beings, perform simulations, analyse systems consisting of computer/physical components and human components, as well as download and upload datasets and models. Domain oriented modelling and visualisation interfaces ease the modelling and analysis processes by hiding the simulation and formal analysis engines. © 2022, Springer Nature Switzerland AG.

关键词： human computer interaction

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A mathematical Steady-State Energy Balance Model for Studying the Physiology of the human Body 2nd

A Mathematical Steady-State Energy Balance Model for Studyin...

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Proceedings of the 2nd International conference on Future Technologies on Manufacturing, Automation, Design and Energy 2021

作者： Das, Shashikant Kumar, Deepak Subudhi, Sudhakar Department of Mechanical and Industrial Engineering IIT Roorkee Roorkee247667 India Department of Mechanical Engineering National Institute of Technology Uttarakhand246174 India

ISBN: (纸本)9789819912872

To improve the efficiency of work and quality of life of human beings, the study of thermal comfort is essential. Thermoregulation of the human body is examined analytically in this study. The human body's steady-state heat balance model is used to design a mathematical model. The convective, radiative, respiratory, and evaporative heat transfer are the mechanisms of heat transfer in this model. The behaviour of mean body, core, and required skin temperatures to attain thermal comfort are observed by increasing metabolic rate and keeping all other parameters constant. The behaviour of different modes of heat transfer is examined by increasing ambient temperature and keeping all other parameters constant. The convection, radiation and respiration heat losses to the environment decrease;however, evaporation heat loss increases due to the increase of environmental temperature. With the increase of ambient temperature by keeping all other parameters constant, the behaviour of mean body and core temperatures are examined. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Thermal comfort

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Quality of Experience Evaluation of Smart-wearables A mathematical modelling Approach 35

Quality of Experience Evaluation of Smart-wearables A Mathem...

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IEEE 35th International conference on Data engineering (ICDE)

作者： Pal, Debajyoti Triyason, Tuul Varadarajan, Vijayakumar Zhang, Xiangmin King Mongkuts Univ Technol Thonburi Sch Informat Technol Bangkok Thailand VIT Univ Sch Comp Sci & Engn Chennai Tamil Nadu India Wayne State Univ Sch Informat Sci Detroit MI USA

ISBN: (纸本)9781728108902

A rapid growth in the smart-wearable industry is making it increasingly important to cater to the Quality of Experience (QoE) requirements of the end-users. In this work, we try to model the relationship between human experience and quality perception in relation to the smart-wearable segment. For this, the concepts of Quality of Data (QoD) and Quality of Information (Qol) are used. Step-counts and heart-rate measurement readings by the wearables are the parameters considered for evaluating the QoD, whereas perceived ease of use, perceived usefulness, and richness in information are the ones taken for evaluating the QoI. A subjective experiment comprising of 40 participants and 5 wearable devices is performed in a free-living condition in order to create the QoE model. We hypothesize QoE to be a function of QoD, and Qol and use a balanced weight technique to formulate the final model. R-2 and adjusted-R-2 values of 0.65 and 0.63 indicate a reasonable predictive power of the proposed scheme. Based upon the results appropriate recommendations are provided to the different smart-wearable vendors for improving their products, thereby ensuring a greater user-adoption.

关键词： Quality of Experience Quality of Data Quality of Information Smart-wearable User adoption

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TURBULENT IMPINGING FLOW SIMULATION FOR HIGH-LEVEL WASTE STORAGE AND PROCESSING APPLICATIONS

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11th International conference on Environmental Remediation and Radioactive Waste Management

作者： Rhea, S. Fairweather, M. Univ Leeds Sch Proc Environm & Mat Engn Inst Particle Sci & Engn Leeds LS2 9JT W Yorkshire England

ISBN: (纸本)9780791843390

The efficient storage and processing of high-level nuclear waste could be improved by a better understanding of the behaviour of the particle-laden fluid flows involved. This work reports a mathematical modelling study of impinging single-and two-phase turbulent jets that is of relevance to the flows used industrially to prevent the settling of solid particles in storage tanks, and to re-suspend particles that form a bed. A computational fluid dynamic model, that embodies a Lagrangian particle tracking technique, is applied to the prediction of these flows. Predictions in the free flow and wall regions, and along the stagnation line, of the single-phase flow are in reasonable accord with data, although the addition of particles results in less satisfactory agreement between predictions and measurements. The influence of particles is, however, reproduced qualitatively by the mathematical model, with quantitative differences attributable to a lack of particle drag in the simulations. Uncertainties in experimental parameters may be responsible for some of the differences between predictions and data, and examination of the data used casts doubts on its reliability. Further work is required in terms of the use of more advanced turbulence modelling techniques, and the provision of detailed and reliable data sets.

关键词： Turbulence Uncertainty Particulate matter Flow (Dynamics) Simulation Drag (Fluid dynamics) Modeling engineering simulation Storage tanks Radioactive wastes Storage Flow simulation Jets Fluid dynamics Reliability Computational fluid dynamics

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