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4th IEEE International conference on Control System Computing and engineering (ICCSCE 2014)

作者： Ahmad, Rana Fayyaz Malik, Aamir Saeed Amin, Hafeezullah Kamel, Nidal Zafar, Raheel Qayyum, Abdul Univ Teknol Petronas Dept Elect & Elect Engn Ctr Intelligent Signal & Imaging Res Tronoh Malaysia

ISBN: (纸本)9781479956869

Performance of electronic sensors used for physical measurements is highly depends upon the operating conditions. Environmental changes e.g., temperature variations do affect the sensor outputs especially for those which are used for very precise measurement. The effect of temperature variation from ambient to the harsh drastically degrades the electronic sensor output performance e.g., piezoelectric sensor in our case. It is very hard to model the output variation of piezoelectric sensor whose output is non-deterministic or random in nature and it also change with temperature. Normal mathematical modelling techniques to correct error are very difficult to implement due to complexity and nonlinearity. Data has been acquired from piezoelectric sensor used for pressure measurement whose output variation is random in nature with respect to the temperature variations. The scope of this paper is to study the behaviour of piezoelectric sensor output signal taking into consideration the different varying temperature profiles. Artificial intelligence technique like Fuzzy is used to minimize the error up to desirable amount. The novelty in our work is that Fuzzy approach has been implemented on this kind of engineering problem. Results have been compared with mathematical technique i.e., curve fitting based upon the error correction criterion. Fuzzy approach has shown significant improvement in error minimization of piezoelectric sensor as compared to the mathematical techniques.

关键词： Piezoelectric Sensor Fuzzy modelling Error minimization

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mathematical modelling of the influence of yield shear stress on blood friction in a turbulent flow 4

Mathematical modelling of the influence of yield shear stres...

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4th International conference on mathematical Methods and Computational Techniques in Science and engineering, MMCTSE 2020

作者： Bartosik, A. Mitura, S. Kielce University of Technology Al. Tysiaclecia P.P. 7 Kielce PL25-314 Poland Technical University of Liberec Studentská 1402/2 Liberec461 17 Czech Republic

Measurements of blood rheology indicate that human blood has a yield shear stress. Transport of oxygen in the aorta or a vein depends on blood flow rate. Therefore, it is interesting to find out how blood yield shear stress affects blood transportation if flow is turbulent. The majority of mathematical approaches deal with laminar flow of human blood, which is rather simple compared to turbulent flow modelling. This paper presents a mathematical model of fully developed turbulent flow of human blood in the aorta. The physical model assumes that blood is a non-Newtonian liquid that demonstrates yield shear tress. The main objective of the research is to examine the influence of human blood yield shear stress on turbulent properties, like friction factor, in the aorta. Available blood rheology experimental data for various concentrations of haematocrit were used in order to fit the rheological model. The rheological model together with the momentum equation and the two-equation turbulence model constitute a mathematical model of turbulent flow of human blood. Results of simulations are discussed and presented as figures and conclusions. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Turbulent flow

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Dynamic Network Visualization of Space Use Patterns to Support Agent-based modelling for Spatial Design 17th

Dynamic Network Visualization of Space Use Patterns to Suppo...

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17th International conference on Cooperative Design, Visualization, and engineering (CDVE)

作者： Esposito, Dario Abbattista, Ilenia Polytech Univ Bari I-70125 Bari Italy

ISBN: (纸本)9783030608156;9783030608163

Urban planning practice and architectural design increasingly adopt agent-based models and simulations to support decision-making for spatial design. Nonetheless, although essential, a reliable representation of human spatial behaviour in a socially rich context is still challenging. The study presents a framework built on a Dynamic Network Visualization of space use patterns based on a Post Occupancy Evaluation in the case study of a hospital ward, which is intended to develop an agent-based spatial analysis. A functional and organizational redesign of the ward plan is proposed following the analysis of social and spatial behaviour of agents. The outlined methodology aims to prepare the development of a multi-agent software simulation to validate the proposed redesign from a human-centred perspective. Findings indicate the relevance of the proposed approach starting from organizational contexts with complex workflows where cooperation between agents is widely exist, such as in healthcare environments. The framework is structured as a methodology to support the practice of architectural design and urban planning for the realization of more efficient and sustainable cities.

关键词： Dynamic Network Visualization Agent-based modelling Spatial design

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A modelling framework for data-driven design for sustainable behaviour in human-machine interactions 23

A modelling framework for data-driven design for sustainable...

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23rd International conference on engineering Design, ICED 2021

作者： Montecchi, Tiziano Becattini, Niccolo Universidad Técnica Federico Santa María Chile Politecnico di Milano Italy

As the society is already permeated by data, a data-driven approach to inform design for sustainable behaviour can help to identify misbehaviours and target sustainable behaviours to achieve, as well as to select and implement the most suitable design strategies to promote a behavioural change and monitor their effectiveness. This work addresses the open challenge of providing designers with a model for human-Machine Interactions (HMI) that helps to identify relevant data to collect for inferring user behaviour related to environmental sustainability during product use. We propose a systematic modelling framework that combines constructs from existing representation techniques to identify the most critical variables for resources consumption, which are the determinants of potential misbehaviours related to HMI. The analysis is represented as a behaviour-Inefficiency Model that graphically supports the analyst/designer to link user behaviours with a quantitative representation of resources consumption. The paper describes the model through an example of the use of a kettle and an additional application of the same approach to a washing machine, in order to point out its versatility for modelling more complex interactions. © ICED *** right reserved.

关键词： Big data

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Bioremediation of lipid rich wastewater in an up-flow biofilm reactor leading to bio methane generation-Experiments and mathematical modelling

Bioremediation of lipid rich wastewater in an up-flow biofil...

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International conference on Advances in Bioprocess engineering and Technology (ICABET)

作者： Chakraborty, Chandrima Bhattacharya, Pinaki Chowdhury, Ranjana Calcutta Inst Technol Dept Chem Engn Uluberia 711316 Howrah India Heritage Inst Technol Dept Chem Engn Kolkata 700107 W Bengal India Jadavpur Univ Dept Chem Engn Kolkata 7000032 W Bengal India

High-fat effluents of edible oil industries have been treated successfully in the biofilm reactor leading to generation of biogas as a potential source of energy with simultaneous removal of COD from waste stream. Under present investigation bioremediation of lipid rich wastewater has been carried out in a laboratory scale packed bed bioreactor. Energy efficiency of the bioconversion process has also been calculated on the basis of mustard oil in the feed stream as the main energy source. We developed a mathematical model based on Monod kinetics to predict the system behaviour satisfactorily.] (C) 2015 Elsevier Ltd. All rights reserved.

关键词： lipid energy efficiency biofilm biogas

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Maintenance modelling in the case of in-development systems:: Application of OODBN to turbofan engines

Maintenance modelling in the case of in-development systems:...

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European Safety and Reliability conference (ESREL 2007)

作者： Guyot, B. Cayre, E. Berenguer, C. Snecma Moissy Cramayel France Univ Technol Troyes Troyes France

ISBN: (纸本)9780415447867

This document aims to present a method of maintenance modelling in the case of in-development complex systems. This one leads to compute maintenance indicators, such as maintenance costs and operations frequencies. It provides criteria during technological decision-making process, under constraints of limiting uncertainties. Based on the application of Bayesian Networks, this method can be divided into three different tasks. Firstly, a standard degradation model, based on comparable systems behaviours, is built up by using the Object Oriented Dynamical Bayesian Networks theory. Then, this network is fitted to the behaviour of a specific system. Lastly, this mathematical tool is updated by adding new variables in order to compute maintenance modelling.

关键词： Turbofan engines

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modelling of flow behaviour of magnesium alloys 16th

Modelling of flow behaviour of magnesium alloys

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16th Metal Forming International conference, 2016

作者： Bruni, Carlo Department of Industrial Engineering and Mathematical Sciences Università Politecnica Delle Marche Via Brecce Bianche Ancona Italy

ISBN: (纸本)9783038357049

The present paper aims at studying the flow behaviour of magnesium alloys under different conditions in terms of temperature, deformation velocities and deformation. The modelling approach was based on a proposed equation to model the shape of each flow curve through different variables. The modeled flow curves were subsequently compared with those obtained with experiments. The models were validated on flow curves not used in the building stage. It was observed that, for the high temperature, the flow softening has to be limited in order to allow the extrapolation queue required for elevated deformations. Also for low temperature values, high deformation velocities and deformations the final part of the flow curve has to be adapted in order to be utilized for the description of material in the numerical simulation. In other words they need to be extrapolated. The deformation value at which the extrapolation starts can be predicted with an other proposed equation detailed in the paper. © 2016 Trans Tech Publications, Switzerland.

关键词： Deformation

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Triply articulated modelling in complex systems

Triply articulated modelling in complex systems

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9th World Multi-conference on Systemics, Cybernetics and Informatics

作者： Cohen, Bernard Boxer, Philip City Univ London Sch Informat London EC1V 0HB England

ISBN: (纸本)9789806560598

We argue that traditional systems engineering (TSE) is inadequate for engineering complex systems. This inadequacy becomes particularly problematic when the system in question is a System of Systems (SoS) whose behaviour depends on how human users of the component systems, anticipating the consequences of their own behaviour, interact with those systems and with each other. Considering its users to be part of the SoS renders such a system anticipative, and therefore necessarily complex. To be effective, the designer of an SoS must incorporate an understanding of its users' models of their contexts of use. However, the process of design then becomes reflexive, since it must include within itself models of its users' anticipations of its relation to the SoS's environment, including those of its designers. As a result, complex systems engineering (CSE) has to become a distinct discipline, involving explicit processes that occur at the time of use of an SoS, not only for negotiating shared meaning between component systems within peer-to-peer relationships, but also for considering the dynamic effects of differing uses of component systems on the behaviour of the SoS as a whole. By modeling users' relations to demand as well as to the behaviour and organisation of component systems, triply articulated modeling supports the negotiation of shared meaning and accommodates the reflexivity required of a CSE regimen.

关键词： systems-of-systems asymmetric demand enterprise modeling triple articulation power-to-the-edge anticipative systems third-order systems complex systems engineering granularity stratification simplicial complex value ladders

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Parametric analysis of Quadruple conical tank system 6

Parametric analysis of Quadruple conical tank system

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6th Nirma University International conference on engineering, NUiCONE 2017

作者： Patel, Alpesh Joshi, Purva Patel, Jignesh Pithva, Rajan Jadav, Chirag Instrumentation and Control Engineering Department Institute of Technology India

ISBN: (纸本)9781538617472

Modified Quadruple conical tank system is benchmark a laboratory setup for testing of various linear and nonlinear control algorithms for the multivariable control system. This novel arrangement of quadruple conical tank system provides multiple process configuration for multivariable input-output. This paper presents the hardware structure of quadruple conical tank, computer interfacing using LabVIEW software, mathematical modelling of system and dynamic behaviour study. Additionally, paper explores the open loop response based parametric analysis for different input and output configurations with various operating points of quadruple conical tank system using linearized model obtained from LabVIEW. Through comparative studies of open loop response in simulation environment and real-time hardware system, the effect of interaction, coupling, time variations and change in dynamic behaviour of QCTS confirmed. © 2017 IEEE.

关键词： Linearization

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On the preservation of fibre direction during axisymmetric hyperelastic mass-growth of a finite fibre-reinforced tube

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JOURNAL OF engineering MATHEMATICS 2018年第1期109卷 173-210页

作者： Soldatos, Kostas P. Univ Nottingham Sch Math Sci Nottingham NG7 2RD England Univ Nottingham Spencer Inst Theoret & Computat Mech Nottingham NG7 2RD England

Several types of tube-like fibre-reinforced tissue, including arteries and veins, different kinds of muscles, biological tubes as well as plants and trees, grow in an axially symmetric manner that preserves their own shape as well as the direction and, hence, the shape of their embedded fibres. This study considers the general, three-dimensional, axisymmetric mass-growth pattern of a finite tube reinforced by a single family of fibres growing with and within the tube, and investigates the influence that the preservation of fibre direction exerts on relevant mathematical modelling, as well on the physical behaviour of the tube. Accordingly, complete sets of necessary conditions that enable such axisymmetric tube patterns to take place are initially developed, not only for fibres preserving a general direction, but also for all six particular cases in which fibres grow normal to either one or two of the cylindrical polar coordinate directions. The implied conditions are of kinematic character but independent of the constitutive behaviour of the growing tube material. Because they hold in addition to and simultaneously with standard kinematic relations and equilibrium equations, they describe growth by an overdetermined system of equations. In cases of hyperelastic mass-growth, the additional information they thus provide enables identification of specific classes of strain energy densities for growth that are admissible and, therefore, suitable for the implied type of axisymmetric tube mass-growth to take place. The presented analysis is applicable to many different particular cases of axisymmetric mass-growth of tube-like tissue, though admissible classes of relevant strain energy densities for growth are identified only for a few example applications. These consider and discuss cases of relevant hyperelastic mass-growth which (i) is of purely dilatational nature, (ii) combines dilatational and torsional deformation, (iii) enables preservation of shape and direction

关键词： Anisotropicmass-growth Axisymmetric mass-growth Elastic-likemass-growth Growth of cylinders and tubes Hyperelastic mass-growth Mass-growth modelling

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