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Editorial Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2021-01-18
(2021). Editorial. Mathematical and Computer Modelling of Dynamical Systems: Vol. 27, No. 1, pp. 1-2.
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System model building and dynamic online control of traffic flow Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-11-06 Xiao-Qiong Huang; Yun-Xiang Han
ABSTRACT The Underground transportation system plays a vital role in public transportation and exhibits complicated dynamics. The model predictive control approach for underground train dispatching is proposed in this paper. The system modelling technique spatially aggregates trains to generate the traffic flow model in a network of interconnected control units. The state-space model for the underground
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An energy-consumption model for establishing an integrated energy-consumption process in a machining system Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-11-02 Wenbin Gu; Zhuo Li; Zeyu Chen; Yuxin Li
ABSTRACT Manufacturing industry accounts for a significant part of world’s energy consumption and environmental pollutions. Machining process is a major process of manufacturing industries, plays an important role in energy saving and emission reduction. This paper established an energy-consumption model for machining processes considering the full states of machining processes. Firstly, machining
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Fluid-Structure Port-Hamiltonian Model for Incompressible Flows in Tubes with Time Varying Geometries Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-03 Luis A. Mora; Le Gorrec Yann; Hector Ramirez; Juan Yuz
A simple and scalable finite-dimensional model based on the port-Hamiltonian framework is proposed to describe the fluid–structure interaction in tubes with time-varying geometries. For this purpose, the moving tube wall is described by a set of mass-spring-damper systems while the fluid is considered as a one-dimensional incompressible flow described by the average momentum dynamics in a set of incompressible
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Model updating for undamped gyroscopic systems with connectivity constraints Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-26 Hairui Zhang; Yongxin Yuan
An important and difficult aspect for the finite element model updating problem is to make the updated model have physical meaning, that is, the connectivity of the original model should be preserved in the updated model. In many practical applications, the system matrices generated by discretization of a distributed parameter system with the finite element techniques are often very large and sparse
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First principles versus artificial neural network modelling of a solar desalination system with experimental validation Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-12 Ali Bagheri; Nadia Esfandiari; Bizhan Honarvar; Amin Azdarpour
The present study mainly focuses on enhancing the performance of solar still unit using solar energy through cylindrical parabolic collector and solar panels. A 300 W solar panel is used to heat saline water by thermal elements outside the solar still unit. Solar panels are cooled during the hot hours of the day; thus, reducing their temperature may lead to an increase in solar panel efficiency followed
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Dynamic system optimal performances of shared autonomous and human vehicle system for heterogeneous travellers Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-16 Yao Li
Autonomous vehicles (AV) can solve vehicle relocation problems faced by traditional one-way vehicle-sharing systems. This paper explores the deterministic time-dependent system optimum of mixed shared AVs (SAV) and human vehicles (SHV) system to provide the benchmark for the situation of mixed vehicle flows. In such a system, the system planner determines vehicle-traveller assignment and optimal vehicle
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Modelling and analysis of the nonlinear string-mass structure of the vibration absorber Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-16 L. Cveticanin; M. Zukovic; Z. Rakaric; D. Cveticanin
In this paper a nonlinear string-mass structure of the vibration absorber is analyzed. This structure is convenient to be installed in vibration damping systems of high buildings for their protection in the case of earthquake. The considered string-mass structure contains a translator movable mass connected with two strings. Due to nonlinear geometric properties of the system the motion of the mass
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Adieu and welcome Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-19 Inge Troch
(2020). Adieu and welcome. Mathematical and Computer Modelling of Dynamical Systems: Vol. 26, No. 4, pp. 301-303.
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Editor’s note Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-19 Wolfgang Kemmetmüller
(2020). Editor’s note. Mathematical and Computer Modelling of Dynamical Systems: Vol. 26, No. 4, pp. 304-305.
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Modelling and analysis of haemoglobin catalytic reaction kinetic system Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-06-16 Yanhong Liu; Hui Lv; Bin Wang; Deyun Yang; Qiang Zhang
In order to study whether haemoglobin (Hb) can replace peroxidase and has good catalytic properties. The key to exploring the characteristics of Hb peroxidase is to establish a suitable kinetic model, which is studied in this paper. First, according to the Hb catalytic reaction, a nonlinear system is established and improved. It is proved that the established system is in line with the practical significance
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Multiphysics finite element model for the computation of the electro-mechanical dynamics of a hybrid reluctance actuator Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-06-28 F. Cigarini; E. Csencsics; J. Schlarp; S. Ito; G. Schitter
ABSTRACT In hybrid reluctance actuators, the achievable closed-loop system bandwidth is affected by the eddy currents and hysteresis in the ferromagnetic components and the mechanical resonance modes. Such effects must be accurately predicted to achieve high performance via feedback control. Therefore, a multiphysics electro-mechanical finite element model is proposed in this paper to compute the dynamics
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Cattaneo–Christov heat flux model for three-dimensional flow of a viscoelastic fluid on an exponentially stretching surface Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-06-23 Sehrish Malik; M. Bilal Ashraf; Adnan Jahangir
In this article, we explore the three-dimensional boundary-layer flow over an exponentially stretching surface in two parallel ways. Constitutive equations of a second-grade fluid are used. Instead of classical Fourier’s law, Cattaneo–Christov heat flux model is employed for the formulation of the energy equation. This model can predict the effects of thermal relaxation time on the boundary layer.
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Master-slave synchronization of neural networks with time-varying delays via the event-triggered control Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-06-16 Jun Zhou; Dongbing Tong; Qiaoyu Chen; Wuneng Zhou
This paper investigates the problem of master-slave synchronization of neural networks with time-varying delays via the event-triggered control (ETC). First, the proposed ETC can effectively reduce the total amount of data transmitted to the controller in the synchronization process and avoid communication channel congestion. Second, a master-slave synchronization of neural networks with time-varying
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Production and payment policies for an imperfect manufacturing system with discount cash flows analysis in fuzzy random environments Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-06-22 Puspita Mahata; Gour Chandra Mahata
This paper considers an imperfect manufacturing system with credit policies in fuzzy random environments. The supplier simultaneously offers the retailer either a permissible delay in payments or a cash discount and retailer in turn provides its customer a permissible delay period. We used an alternate approach – discount cash flow analysis to establish an inventory problem. It is assumed that the
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Oscillating stationary distributions of nanoclusters in an open system Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2020-07-19 S. A Matveev; A. A Sorokin; A. P Smirnov; E.E. Tyrtyshnikov
ABSTRACT Steady-state oscillations of nanoparticle populations in the system of colliding monomers and seed-clusters are observed for the range of the seed-cluster source with diffusion and ballistic collision kernels. The dynamics of nanoparticles in this system is driven by monomer-cluster and cluster-cluster irreversible aggregation and described in terms of the number of primary monomers per nanoparticle
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Towards optimal control of concentric tube robots in stereotactic neurosurgery Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-11-27 K. Flaßkamp, K. Worthmann, J. Mühlenhoff, C. Greiner-Petter, C. Büskens, J. Oertel, D. Keiner, T. Sattel
We consider the design and control problem of concentric tubes used in stereotactic neurosurgery. The goal is to optimally reach a configuration of the cannula linking an entry point on the skullcap to a pre-specified region inside the brain. Key issues related to this task are the mechanical behaviour of the cannula and the topography of the brain. We formulate an optimal control problem in order
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Crisp and interval inventory models for ameliorating item with Weibull distributed amelioration and deterioration via different variants of quantum behaved particle swarm optimization-based techniques Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-11-27 Rajan Mondal, Ali Akbar Shaikh, Asoke Kumar Bhunia
This paper presents two inventory models for ameliorating items under crisp and interval environments. In these models, three-parameter Weibull distribution is considered to represent both the amelioration and deterioration rates. In crisp, an inventory model is formulated for ameliorating item with fixed values of different inventory parameters. Due to uncertainty, these parameters may not be fixed
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Quantum-computing with AI & blockchain: modelling, fault tolerance and capacity scheduling Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-10-29 Wanyang Dai
We model the hardware and software architecture for generalized Internet of Things (IoT) by quantum cloud-computing and blockchain. To reduce the measurement error and increase the efficiency of quantum entanglement (i.e. the capability of fault tolerance) in the current quantum computers and communications, we design a quantum-computing chip by modelling it as a multi-input multi-output (MIMO) quantum
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An ordering policy for deteriorating items with price-dependent iso-elastic demand under permissible delay in payments and price inflation Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-10-29 Puspita Mahata, Gour Chandra Mahata, Avik Mukherjee
This paper considers the problem of dynamic decision-making for an inventory model for deteriorating items under price inflation and permissible delay in payment. In this paper, we adopt an iso-elastic and selling price dependent demand function to model the finite time horizon inventory for deteriorating items. The stocks deteriorate physically at a constant fraction of the on-hand inventory. The
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Nonlinear modeling and performance analysis of a closed-loop supply chain in the presence of stochastic noise Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-09-17 Sajjad Aslani Khiavi, Hamid Khaloozadeh, Fahimeh Soltanian
We study four-echelon supply chains consisting of manufacturer, wholesaler, retailer and customer with recovery center as hybrid recycling channels. In order to gain a larger market share, the retailer often takes the sales as a decision-making variable. For this purpose, in this supply chain, the retailer limits the forecast of market demand in future periods with expected logic. It also manages demand
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Performance analysis and optimization of a retrial queue with working vacations and starting failures Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-09-09 Dong-Yuh Yang, Chia-Huang Wu
This paper presents a steady-state analysis of an M/M/1 retrial queue with working vacations, in which the server is subject to starting failures. The proposed queueing model is described in terms of the quasi-birth-death (QBD) process. We first derive the system stability condition. We then use the matrix-geometric method to compute the stationary probability distribution of the orbit size. Some performance
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On the evaluation of the takeoff time and of the peak time for innovation diffusion on assortative networks Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-09-05 Maria Letizia Bertotti, Giovanni Modanese
This paper deals with a generalization of the Bass model for the description of the diffusion of innovations. The generalization keeps into account heterogeneity of the interactions of the consumers and is expressed by a system of several nonlinear differential equations on complex networks. The following contributions can be singled out: first, explicit algorithms are provided for the construction
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An integer-valued bilinear time series model via two random operators Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-08-30 M. Mohammadpour, Hassan S. Bakouch, S. Ramzani
This paper presents a new stationary integer-valued bilinear time series model of the first order by mixing the thinning and Pegram operators. Some statistical properties of the model are obtained, involving the conditional moments, autocovariance and spectral density function. Estimation of the model parameters is discussed using the Yule-Walker and conditional least squares methods with a simulation
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Port-Hamiltonian modelling of nonlocal longitudinal vibrations in a viscoelastic nanorod Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-08-29 Hanif Heidari, H. Zwart
Analysis of nonlocal axial vibration in a nanorod is a crucial subject in science and engineering because of its wide applications in nanoelectromechanical systems. The aim of this paper is to show how these vibrations can be modelled within the framework of port-Hamiltonian systems. It turns out that two port-Hamiltonian descriptions in physical variables are possible. The first one is in descriptor
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Model-based fault detection and isolation of non-technical losses in electrical networks Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-08-25 Anna I. Pózna, Attila Fodor, Katalin M. Hangos
A model-based diagnostic method is proposed for detecting and isolating non-technical losses (illegal loads) in low voltage electrical grids of one transformer area. The proposed method uses a simple static linear model of the network and it is based on analysing the differences between the measured and model-predicted voltages. As a preliminary off-line step of the diagnosis, a powerful electrical
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An electrical stimulation data based model to predict the healing period of fractured limb Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-08-19 P. Madhavasarma, M. Sridevi, S. Kumaravel, P. Veeraragavan
In this work, diagnosing of reunion of human tibia fracture across limbs using a simple mathematical model is demonstrated. At present in practice, the fracture reunion is predicted using repeated radiographs. Frequent exposure to such radiation causes harmful health effects in patients. Hence, as an alternative, modelling technique using electrical data recorded across patients stimulated with DC
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Research on estimation model of the battery state of charge in a hybrid electric vehicle based on the classification and regression tree Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-08-19 Qi Wang, Yinsheng Luo, Xiaoxin Han
In order to achieve the accurate estimation of state of charge (SOC) of the battery in a hybrid electric vehicle (HEV), this paper proposed a new estimation model based on the classification and regression tree (CART) which belongs to a kind of decision tree. The basic principle and modelling process of the CART decision tree were introduced in detail in this paper, and we used the voltage, current
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A mathematical modelling to extract active ingredients from Oliveria decumbens by supercritical fluid extraction through using ultrasonic process Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-06-08 Nabil Vaeli, Bizhan Honarvar, Nadia Esfandiari, Zahra Arab Aboosadi
The experimental feasibility of extracting carvacrol or cymophenol from local and medicinal Oliveria decumbens by supercritical carbon dioxide through using ultrasound waves was investigated in this study. The extraction modelling was carried out in two forms: Internal and external. The internal model was adopted to simulate the concentration distribution of the phytochemicals in the plant particles
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Linearization of a class of non-linear systems modelled by multibond graphs Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-06-08 Gilberto Gonzalez Avalos, Gerardo Ayala, Noe Barrera Gallegos, Aaron Padilla Jose
Based on non-linear systems described by multibond graphs, a procedure designed to present symbolic linearization of these multibond graphs, is presented in this paper. Firstly, a junction structure of a multibond graph with multiport gyrators that represent Eulerian junction structures is proposed. In addition, non-linear multiport resistors are considered. By knowing the non-linear causal paths and
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Multi-model predictive control of Hammerstein-Wiener systems based on balanced multi-model partition Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-06-03 Jingjing Du, Lei Zhang, Junfeng Chen, Jian Li, Changping Zhu
Model analysis of Hammerstein-Wiener systems has been made, and it is found that the included angle is applicable to such systems to measure the non-linearity. Then, a dichotomy gridding algorithm is proposed based on the included angle. Supporting by the gridding algorithm, a balanced multi-model partition method is put forward to partition a Hammerstein-Wiener system into a set of local linear models
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A dynamic model of power metal-oxide-semiconductor field-effect transistor half-bridges for the fast simulation of switching induced electromagnetic emissions Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-05-16 D. Büchl, W. Kemmetmüller, T. Glück, B. Deutschmann, A. Kugi
Hard switching of semiconductors is the main source of conducted electromagnetic emissions (EME) in pulse-width modulation (PWM) driven power inverters. The requirements on the electromagnetic compatibility grow with the increasing number of installed electric motor drives and inductive power converters. An accurate prediction of the conducted EME requires a model which considers the switching transition
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On Meeting Energy Balance Errors in Co-Simulations Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-05-12 Thilo Moshagen
The term co-simulation denotes the coupling of some simulation tools for dynamical systems into one big system by having them exchange data at points of a fixed time grid and extrapolating the received data into the interval, while none of the steps is repeated for iteration. From the global perspective, the simulation thus has a strong explicit component. Frequently, among the data passed across subsystem
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Model-based estimation of the stress-strain curve of metal strips Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-04-30 G. Stadler, A. Steinboeck, M. Baumgart, A. Ettl, A. Kugi
The identification of the stress-strain curve of metal strips is a common task in the metals industry. As an alternative to commonly used tensile test machines, an inexpensive, model-based optical measurement method is presented. Particular importance was placed on the cost and usability of the method. The indirect approach computes the stress-strain curve based on a measured strip bending line. For
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Nonlinear dynamic modeling of pneumatic nailing devices Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-04-09 Z. Nili Ahmadabadi, Raynald Guilbault, Frédéric Laville
This paper develops a mathematical modeling procedure for pneumatic nailing devices. The representation integrates all the operation phases composing the nailing process. The model accounts for the dynamics of the chamber pressures, the moving parts, the nonlinear interactions and impacts between the fixed and moving components, and includes the nail gun body and workpiece. All the system parameters
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Mathematical modeling and validation of mass transfer phenomenon in homogeneous charge compression ignition engines based on a thermodynamic multi zone model Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-04-03 Elaheh Neshat, Rahim Khoshbakhti Saray
The main purpose of the current study is mathematical modelling and validation of mass transfer phenomenon in homogeneous charge compression ignition engines. A validated multi-zone model coupled to a semi-detailed chemical kinetics is used to predict homogeneous charge compression ignition combustion and emissions. Heat and Mass transfer submodels are linked to the multi-zone model. Bulk flow and
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Psychological aspects of equation-based modelling Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-03-25 Alexander Pollok, Andreas Klöckner, Dirk Zimmer
Psychological aspects of equation-based modelling languages like Modelica are under-represented in literature. This does not reflect the growth of the corresponding userbase. In this paper we try to close this gap by tackling the problem from three sides: we conduct expert interviews, we conduct an experiment based on self-reported timings to analyse the effects of inheritance on understandability
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An energy-based analysis of reduced-order models of (networked) synchronous machines Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-02-12 T. W. Stegink, C. De Persis, A. J. Van Der Schaft
Stability of power networks is an increasingly important topic because of the high penetration of renewable distributed generation units. This requires the development of advanced techniques for the analysis and controller design of power networks. Although there are widely accepted reduced-order models to describe the power network dynamics, they are commonly presented without details about the reduction
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Design and simulation of sensor fusion using symbolic engines Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-02-10 Mohamed Atia
Sensor fusion is the art of estimating accurate information from noisy multi-sensor data. Due to the complexity of stochastic sensor errors, design and testing of sensor fusion algorithms have been always challenging. Existing design approaches are mainly mission specific with fixed system models that do not verify if the filter can estimate hidden errors. To address these challenges, this paper presents
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A cellular automata model of chemotherapy effects on tumour growth: targeting cancer and immune cells Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2019-02-06 Fateme Pourhasanzade, S. H. Sabzpoushan
The effects of therapy on avascular cancer development based on a stochastic cellular automata model are considered. Making the model more compatible with the biology of cancer, the following features are implemented: intrinsic resistance of cancerous cells along with drug-induced resistance, drug-sensitive cells, immune system. Results are reported for no treatment, discontinued treatment after only
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Pseudo bond graph tunnel greenhouse model with accurate longwave/shortwave radiations model Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-12-23 M. Abbes, A. Farhat, A. Mami
This research work is focused on the construction of an accurate longwave/shortwave radiation model on a tunnel greenhouse pseudo-bond graph model, widely used in Tunisia. This model includes sun position, useful incoming solar radiation model, sky longwave radiation model, inside longwave and shortwave radiation model. The key idea is to use bond graphs allowing a lumped modelling approach which is
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On the modelling of heat exchangers and heat exchanger network dynamics using bond graphs Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-10-15 Jørgen Bremnes Nielsen, Eilif Pedersen
Heat exchanger networks are important systems in most thermal engineering systems and are found in applications ranging from power plants and the process industry to domestic heating. Achieving cost-effective design of heat exchanger networks relies heavily on mathematical modelling and simulation-based design. Today, stationary design calculations are carried out for all new designs, but for some
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The structural index of sensitivity equation systems Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-10-11 Atiyah Elsheikh, Wolfgang Wiechert
This work presents a new methodology for computing parameter sensitivities of differential algebraic system of equations with higher differential index. This methodology is particularly adequate for performing sensitivity analysis of object-oriented models described by modern universal modelling languages. By employing the same concepts and tools adopted by these languages for structural analysis of
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A Dynamical Systems Model of Intrauterine Fetal Growth. Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-10-07 Mohammad T Freigoun,Daniel E Rivera,Penghong Guo,Emily E Hohman,Alison D Gernand,Danielle Symons Downs,Jennifer S Savage
The underlying mechanisms for how maternal perinatal obesity and intrauterine environment influence foetal development are not well understood and thus require further understanding. In this paper, energy balance concepts are used to develop a comprehensive dynamical systems model for foetal growth that illustrates how maternal factors (energy intake and physical activity) influence foetal weight and
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Platform modelling and scheduling game with multiple intelligent cloud-computing pools for big data Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-09-20 Wanyang Dai
We develop a generic game platform that can be used to model various real-world systems with multiple intelligent cloud-computing pools and parallel-queues for resources-competing users. Inside the platform, the software structure is modelled as Blockchain. All the users are associated with Big Data arrival streams whose random dynamics is modelled by triply stochastic renewal reward processes (TSRRPs)
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Modelling and identification of nonlinear cascade systems with backlash input and static output nonlinearities Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-09-19 Jozef Vörös
A new approach to the parameter identification of nonlinear dynamic systems using cascade models with nonlinear dynamic, linear dynamic and nonlinear static blocks is presented. Application of the key-term separation principle provides special expressions for the corresponding nonlinear model description that are linear in parameters. A least-squares-based iterative technique is proposed allowing estimation
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H2 optimal model order reduction on the Stiefel manifold for the MIMO discrete system by the cross Gramian Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-09-19 Wei-Gang Wang, Yao-Lin Jiang
In this paper, the H2 optimal model order reduction method for the large-scale multiple-input multiple-output (MIMO) discrete system is investigated. First, the MIMO discrete system is resolved into a number of single-input single-output (SISO) subsystems, and the H2 norm of the original MIMO discrete system is expressed by the cross Gramian of each subsystem. Then, the retraction and the vector transport
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Modelling of the operation of a Dual Mass Flywheel (DMF) for different engine-related distortions Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-09-19 Dariusz Szpica
The application of Dual Mass Flywheels (DMF) was inspired by the need to reduce the level of vibrations generated by the drivetrain. The DMF input parameters are a result of the engine operation, in which the cyclicity of the subsequent strokes results in a variation of the engine speed. The fewer the cylinders the greater the engine speed variation and fluctuation of the engine torque. Additionally
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Dynamic process scheduling and resource allocation in distributed environment: an agent-based modelling and simulation Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-09-03 Poulami Dalapati, Piyush Agarwal, Animesh Dutta, Swapan Bhattacharya
This paper addresses the issues concerning resource allocation and process scheduling in a dynamic environment, where resources are distributed and availability of them is uncertain. In this context, we introduce a new multi-agent-based resource allocation and process scheduling approach, where agents communicate and cooperate among themselves to produce an optimal schedule. A distributed constraint
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A connection between time domain model order reduction and moment matching for LTI systems Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-08-02 Manuela Hund, Jens Saak
We investigate the time domain model order reduction (MOR) framework using general orthogonal polynomials by Jiang and Chen [1] and extend their idea by exploiting the structure of the corresponding linear system of equations. Identifying an equivalent Sylvester equation, we show a connection to a rational Krylov subspace, and thus to moment matching. This theoretical link between the MOR techniques
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Modelling and analysis of multiscale systems related to fluid dynamical problems Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-08-01 Jürgen Geiser
(2018). Modelling and analysis of multiscale systems related to fluid dynamical problems. Mathematical and Computer Modelling of Dynamical Systems: Vol. 24, Modelling and Analysis of Multiscale Systems related to Fluid Dynamical Problem, pp. 315-318.
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Smoothed particle hydrodynamics and modal reduction for efficient fluid–structure interaction Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-08-01 Markus Schörgenhumer, Alexander Humer
From wind turbines to capillary blood flow, problems of fluid–structure interaction occur across different scales of length and time. Owed to the multiple scales involved, the inherent complexity of coupled fluid and structural dynamics requires advanced numerical methods for the computational analysis. The proposed method relies on the coupling of modally reduced flexible multibody systems with fluids
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Multiscale modelling via split-step methods in neural firing Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-08-01 Pavol Bauer, Stefan Engblom, Sanja Mikulovic, Aleksandar Senek
Neuronal models based on the Hodgkin–Huxley equation form a fundamental framework in the field of computational neuroscience. While the neuronal state is often modelled deterministically, experimental recordings show stochastic fluctuations, presumably driven by molecular noise from the underlying microphysical conditions. In turn, the firing of individual neurons gives rise to an electric field in
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Corrigendum: a momentum form of Kane’s equations for scleronomic systems Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-07-19 James R. Phillips, Farid Amirouche
In the authors’ previously published paper, ‘A Momentum form of Kane’s equations for scleronomic systems’ (https://doi.org/10.1080/13873954.2017.1385638), the discussion defining the procedure for calculating nonworking constraint forces is flawed. In this corrigendum, we supply a corrected discussion and procedure, illustrated with an example.
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Multiscale modelling and splitting approaches for fluids composed of Coulomb-interacting particles Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-07-05 Jürgen Geiser
We consider fluids composed of Coulomb-interacting particles, which aremodelled by the Fokker--Planck equation with a collision operator.Based on modelling the transport and collision of the particles,we propose new, computationally efficient, algorithms based on splitting the equations of motion into a global Newtonian transport equation, where the effects of an external electric field are considered
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Ambit fields: a stochastic modelling approach Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-06-27 Jürgen Schmiegel
This paper reviews some recent developments in the field of ambit stochastics with focus on modelling applications. The great flexibility and mathematical tractability of ambit fields is illustrated by a wide range of applications, covering such diverse areas as turbulence, tumour growth and finance.
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Control-oriented modeling of servo-pump driven injection molding machines in the filling and packing phase Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-06-18 Christoph Froehlich, Wolfgang Kemmetmüller, Andreas Kugi
Servo-valves or variable displacement pumps are typically used to control conventional hydraulic injection molding machines (IMMs). Recent developments in electrical drive technology allow to utilize servo-motor driven pumps instead, which is beneficial due to their higher energy efficiency. Their dynamic behavior, however, is significantly different compared to the conventional setup. Thus, currently
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Erratum Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-06-07
(2018). Erratum. Mathematical and Computer Modelling of Dynamical Systems: Vol. 24, No. 3, pp. i-i.
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A new framework for -optimal model reduction Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-04-25 Alessandro Castagnotto, Boris Lohmann
In this contribution, a new framework for H2-optimal reduction is presented, motivated by the local nature of both (tangential) interpolation and H2-optimal approximations. The main advantage is given by a decoupling of the cost of reduction from the cost of optimization, resulting in a significant speedup in H2-optimal reduction. In addition, a middle-sized surrogate model is produced at no additional
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Empirical Gramian-based spatial basis functions for model reduction of nonlinear distributed parameter systems Math. Comput. Model. Dyn. Syst. (IF 0.766) Pub Date : 2018-03-05 Mian Jiang, Jigang Wu, Wenan Zhang, Xuejun Li
Correct selection of spatial basis functions is crucial for model reduction for nonlinear distributed parameter systems in engineering applications. To construct appropriate reduced models, modelling accuracy and computational costs must be balanced. In this paper, empirical Gramian-based spatial basis functions were proposed for model reduction of nonlinear distributed parameter systems. Empirical