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Journal articles on the topic 'Model Synchronisation'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Putz, V. B., and J. M. Yeomans. "Hydrodynamic Synchronisation of Model Microswimmers." Journal of Statistical Physics 137, no. 5-6 (September 24, 2009): 1001–13. http://dx.doi.org/10.1007/s10955-009-9826-x.

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2

Roberts, Dale, and Alexander C. Kalloniatis. "Synchronisation under shocks: The Lévy Kuramoto model." Physica D: Nonlinear Phenomena 368 (April 2018): 10–21. http://dx.doi.org/10.1016/j.physd.2017.12.005.

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3

Gazzola, Filippo, and Vitomir Racic. "A model of synchronisation in crowd dynamics." Applied Mathematical Modelling 59 (July 2018): 305–18. http://dx.doi.org/10.1016/j.apm.2018.02.001.

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4

Varan, Metin, Akif Akgül, Emre Güleryüz, and Kasım Serbest. "Synchronisation and Circuit Realisation of Chaotic Hartley System." Zeitschrift für Naturforschung A 73, no. 6 (June 27, 2018): 521–31. http://dx.doi.org/10.1515/zna-2018-0027.

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AbstractHartley chaotic system is topologically the simplest, but its dynamical behaviours are very rich and its synchronisation has not been seen in literature. This paper aims to introduce a simple chaotic system which can be used as alternative to classical chaotic systems in synchronisation fields. Time series, phase portraits, and bifurcation diagrams reveal the dynamics of the mentioned system. Chaotic Hartley model is also supported with electronic circuit model simulations. Its exponential dynamics are hard to realise on circuit model; this paper is the first in literature that handles such a complex modelling problem. Modelling, synchronisation, and circuit realisation of the Hartley system are implemented respectively in MATLAB-Simulink and ORCAD environments. The effectiveness of the applied synchronisation method is revealed via numerical methods, and the results are discussed. Retrieved results show that this complex chaotic system can be used in secure communication fields.

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Liu, Ying, Wenhai Jiao, Longxia Xu, and Xiaohui Li. "Differential Timing Method Based on Modified Traceability Model." Journal of Navigation 73, no. 6 (June 22, 2020): 1326–39. http://dx.doi.org/10.1017/s0373463320000314.

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The common view time transfer and two-way time and frequency transfer methods are currently the main means for achieving time synchronisation at nanosecond level. However, these methods have some limitations in real time and cost, which limit their wide applications in many fields, such as time synchronisation among base stations of the upcoming 5G network. In order to meet the requirements of nanosecond time synchronisation, a low-cost differential timing method is proposed in this paper by changing the manner of generation of traceability model parameters in GNSS navigation messages. The time deviation between GNSS system time and the timing laboratory that maintains Coordinated Universal Time (UTC) kept by timing laboratory named k (UTC(k)) is monitored by receiving the GNSS signal in space with monitoring receivers. The new traceability model parameters are generated with the monitored time deviations and then broadcast to users through the GNSS navigation message. The precision of the one-way timing method can be improved from tens of nanoseconds to the order of several nanoseconds with the proposed method. In addition, there are obvious advantages to carry out this method on the geostationary satellites in the BeiDou navigation satellite (BDS) constellation. The proposed method is verified on an experimental platform based on the UTC(NTSC) time frequency signal and the geostationary satellites in the BDS-3 constellation.

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6

Bartocci, Ezio, Flavio Corradini, Emanuela Merelli, and Luca Tesei. "Detecting synchronisation of biological oscillators by model checking." Theoretical Computer Science 411, no. 20 (April 2010): 1999–2018. http://dx.doi.org/10.1016/j.tcs.2009.12.019.

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7

Zhang, Jinxing, Yingyu Wang, and Jiandong Zhu. "Synchronisation of Lohe model on smooth curved surfaces." Journal of Engineering 2019, no. 22 (November 1, 2019): 8343–47. http://dx.doi.org/10.1049/joe.2019.1076.

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8

Bizjak, Aleš, and Rasmus Ejlers Møgelberg. "A Model of Guarded Recursion With Clock Synchronisation." Electronic Notes in Theoretical Computer Science 319 (December 2015): 83–101. http://dx.doi.org/10.1016/j.entcs.2015.12.007.

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9

Stewart, Alan. "A programming model for BSP with partitioned synchronisation." Formal Aspects of Computing 23, no. 4 (September 17, 2010): 421–32. http://dx.doi.org/10.1007/s00165-010-0163-2.

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10

Salmela, Erno, and Janne Huiskonen. "Co-innovation toolbox for demand-supply chain synchronisation." International Journal of Operations & Production Management 39, no. 4 (May 14, 2019): 573–93. http://dx.doi.org/10.1108/ijopm-09-2018-0527.

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Purpose The purpose of this paper is to promote decision-making structures between the customer and the supplier in a highly uncertain environment. This phenomenon of demand-supply chain synchronisation includes sharing of high-quality and timely demand and supply information in order to improve the quality and speed of decision-making. Design/methodology/approach The study was carried out as an abductive case study, which started from empirical observations that did not match the prior theoretical framework. Through abductive reasoning and empirical experiments, the prior framework was extended to a new synchronisation model and tools that better accommodate the observed need. Findings A new co-innovation toolbox was developed to create common understanding of demand-supply chain synchronisation between the customer and the supplier. The toolbox includes Demand Visibility Point-Demand Penetration Point, Supply Visibility Point–Supply Penetration Point and Integrative Synchronisation tools. Research limitations/implications The study extends the current models and tools of demand-supply chain synchronisation. With the new toolbox, the development needs of decision-making structures can be identified more comprehensively than with the current tools. Practical implications The developed visual toolbox helps partners create a common understanding of problems and development possibilities in demand-supply chain synchronisation in a highly uncertain environment. Common understanding is a starting point for changing decision-making structures to improve the overall performance of a demand-supply chain. Originality/value The new toolbox is both more comprehensive and more detailed than the previous tools.

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11

RIDDOCH, DAVID, STEVE POPE, DEREK ROBERTS, GLENFORD MAPP, DAVID CLARKE, DAVID INGRAM, KIERAN MANSLEY, and ANDY HOPPER. "TRIPWIRE: A SYNCHRONISATION PRIMITIVE FOR VIRTUAL MEMORY MAPPED COMMUNICATION." Journal of Interconnection Networks 02, no. 03 (September 2001): 345–64. http://dx.doi.org/10.1142/s0219265901000439.

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Existing user-level network interfaces deliver high bandwidth, low latency performance to applications, but are typically unable to support diverse styles of communication and are unsuitable for use in multiprogrammed environments. Often this is because the network abstraction is presented at too high a level, and support for synchronisation is inflexible. In this paper we present a new primitive for in-band synchronisation: the Tripwire. Tripwires provide a flexible, efficient and scalable means for synchronisation that is orthogonal to data transfer. We describe the implementation of a non-coherent distributed shared memory network interface, with Tripwires for synchronisation. This interface provides a low-level communications model with gigabit class bandwidth and very low overhead and latency. We show how it supports a variety of communication styles, including remote procedure call, message passing and streaming.

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12

Kuznetsov, A. P., I. R. Sataev, L. V. Tyuryukina, and N. Yu Chernyshov. "Synchronisation in the phase model of three coupled lasers." Quantum Electronics 44, no. 1 (January 31, 2014): 17–22. http://dx.doi.org/10.1070/qe2014v044n01abeh015092.

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13

Briff, P., A. Lutenberg, L. Rey Vega, F. Vargas, and M. Patwary. "Generalised trade‐off model for energy‐efficient WSN synchronisation." Electronics Letters 51, no. 3 (February 2015): 291–92. http://dx.doi.org/10.1049/el.2014.2753.

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14

Jia, Qiuju, and Zengqiang Chen. "Influence of network connection and synchronisation for Hindmarsh-Rose model." International Journal of System Control and Information Processing 1, no. 1 (2012): 105. http://dx.doi.org/10.1504/ijscip.2012.050470.

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15

Khan, Ayub, and Arti Tyagi. "Chaos Synchronisation of a Chaotic Tumour Growth and Decay Model." Indian Journal of Industrial and Applied Mathematics 8, no. 1 (2017): 46. http://dx.doi.org/10.5958/1945-919x.2017.00005.6.

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16

SMALL, A. J., K. D. DUMBELL, and P. D. SMITH. "CHAOS IN THE TANG-MEES-CHUA MODEL OF THRESHOLD SYNCHRONISATION." International Journal of Bifurcation and Chaos 05, no. 01 (February 1995): 175–87. http://dx.doi.org/10.1142/s0218127495000144.

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A simple mathematical model of the Threshold Synchronisation Mechanism (which we refer to here as the Tang-Mees-Chua Model) is studied. An auxiliary dynamical system is associated to the model in certain parameter ranges which have not been considered before. We prove that for part of this range the underlying dynamics are chaotic. In particular, we establish sensitivity to initial conditions, the existence of unstable periodic orbits of all periods and the presence of dense orbits. This theoretical work is supported by measurements of an experimental circuit and computer simulations.

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17

Klose, Ann Kristin, René M. van Westen, and Henk A. Dijkstra. "Phase synchronisation in the Kuroshio Current System." Ocean Science 16, no. 2 (April 17, 2020): 435–49. http://dx.doi.org/10.5194/os-16-435-2020.

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Abstract. The Kuroshio Current System in the North Pacific displays path transitions on a decadal timescale. It is known that both internal variability involving barotropic and baroclinic instabilities and remote Rossby waves induced by North Pacific wind stress anomalies are involved in these path transitions. However, the precise coupling of both processes and its consequences for the dominant decadal transition timescale are still under discussion. Here, we analyse the output of a multi-centennial high-resolution global climate model simulation and study phase synchronisation between Pacific zonal wind stress anomalies and Kuroshio Current System path variability. We apply the Hilbert transform technique to determine the phase and find epochs where such phase synchronisation appears. The physics of this synchronisation are shown to occur through the effect of the vertical motion of isopycnals, as induced by the propagating Rossby waves, on the instabilities of the Kuroshio Current System.

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18

Cao, Lu, Junqiang Li, Lei Han, and Hengnian Li. "Adaptive Predictive Variable Structure Filter for Attitude Synchronization Estimation." Journal of Navigation 70, no. 1 (May 27, 2016): 205–23. http://dx.doi.org/10.1017/s0373463316000278.

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In this paper, a novel Predictive Variable Structure Filter (PVSF) and its adaptive deformation (APVSF) are presented for attitude synchronisation during Satellite Formation Flying (SFF). The PVSF is proposed based on the variable structure control concept and applied to any nonlinear system with model errors. The model errors in the PVSF need not satisfy the assumption of Gaussian white noise; therefore, it has advantages in dealing with various kinds of uncertainties, parameter variations or noises. Then, the APVSF is also presented to adjust the smoothing boundary layer of PVSF by minimising the Mean-Square Error (MSE). Simulations are performed to demonstrate the accuracy, robustness, and stability of the proposed methodologies for the attitude synchronisation estimation of the SFF system.

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19

Wang, Danping, Gaël Mahe, Junying Fang, Julien Piscione, Serge Couvet, Didier Retiere, Sébastien Laporte, and Pierre-Paul Vidal. "Collaborative sensorimotor intelligence: the scrum as a model." BMJ Open Sport & Exercise Medicine 4, no. 1 (December 2018): e000407. http://dx.doi.org/10.1136/bmjsem-2018-000407.

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AimUsing M-Rex, a rugby scrum simulator, we developed tools to describe scrummaging forces and to prevent accident.MethodsWe tested three groups of frontliners at national level. The simulator was passive or responded to the player(s) to simulate the reaction of opposite players. Sensors in the beam measured the force exerted by each of the players. Their movements were recorded with a Codamotion system.ResultsThe force signals exhibited two phases: a transient phase, similar to a damped sinusoid with a dominant frequency around 5 Hz when the players scrummaged alone and with a wider range when playing together; then, a sustained phase could be decomposed in two components: a DC component remained stable whether frontliners played alone or together. In contrast, its variability decreased when the frontliners played together compared with when they played alone. As for the oscillations, the frontliners exhibited a large variability in their ability to synchronise their efforts during the sustained phase. The synchronisation between the hooker and the props was quite efficient, while it was always missing between two props. Finally, we were able to study postural readjustments and their synchronisation among players during the sustained phase.ConclusionThis study shows that by using adequate methods, it is possible to assess the frontline collective intelligence. These findings may pave the way for innovative methods of training to improve players’ collective behaviour.

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20

Murray, Brendan P., and Miguel D. Bustamante. "Energy flux enhancement, intermittency and turbulence via Fourier triad phase dynamics in the 1-D Burgers equation." Journal of Fluid Mechanics 850 (July 6, 2018): 624–45. http://dx.doi.org/10.1017/jfm.2018.454.

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We present a theoretical and numerical study of Fourier-space triad phase dynamics in the one-dimensional stochastically forced Burgers equation at Reynolds number $Re\approx 2.7\times 10^{4}$. We demonstrate that Fourier triad phases over the inertial range display a collective behaviour characterised by intermittent periods of synchronisation and alignment, reminiscent of the Kuramoto model (Chemical Oscillations, Waves, and Turbulence, Springer, 1984) and directly related to collisions of shocks in physical space. These periods of synchronisation favour efficient energy fluxes across the inertial range towards small scales, resulting in strong bursts of dissipation and enhanced coherence of the Fourier energy spectrum. The fast time scale of the onset of synchronisation relegates energy dynamics to a passive role: this is further examined using a reduced system with the Fourier amplitudes fixed in time – a phase-only model. We show that intermittent triad phase dynamics persists without amplitude evolution and we broadly recover many of the characteristics of the full Burgers system. In addition, for both full Burgers and phase-only systems the physical-space velocity statistics reveals that triad phase alignment is directly related to the non-Gaussian statistics typically associated with structure-function intermittency in turbulent systems.

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21

Spescha, Daniel, Sascha Weikert, Oliver Zirn, and Konrad Wegener. "Synchronisation of Feed Axes with Differing Bandwidths Using Set Point Delay." International Journal of Automation Technology 11, no. 2 (March 1, 2017): 155–64. http://dx.doi.org/10.20965/ijat.2017.p0155.

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This paper presents an effective method for the synchronisation of multiple feed axes with differing controller bandwidths by delaying the set point trajectories of those axes with higher bandwidths. First, a simplified model of a cascade-controlled feed axis is defined, which allows the problem to be treated analytically. The problem of synchronisation of the feed axes is then analysed mathematically, leading to the hypothesis of synchronisation through a delay of the set points of the more dynamic axes. Subsequently, the dynamic error behaviour and boundaries of a feed axis are calculated. The optimal damping factor for a feed axis is shown to be 1/√2 and the dynamic error can be formulated in terms of the bandwidth and acceleration or jerk limit. The proposed method is proven through a simulation and verified based on experimental results. In addition, the stated error bounds are verified, and the limits of the applicability are determined.

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22

Pace, Roberta Di, Giulio E. Cantarella, Stefano de Luca, and Massimo Di Gangi. "Scheduled Synchronisation based on a mesoscopic flow model with speed dispersion." Transportation Research Procedia 27 (2017): 180–87. http://dx.doi.org/10.1016/j.trpro.2017.12.107.

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23

Fong, A. C. M., and A. Simpson. "Using CSP to model the synchronisation process of variable length codes." IEE Proceedings - Communications 153, no. 2 (2006): 195. http://dx.doi.org/10.1049/ip-com:20050462.

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24

Mugnaine, Michele, Adriane S. Reis, Fernando S. Borges, Rafael R. Borges, Fabiano A. S. Ferrari, Kelly C. Iarosz, Ibere L. Caldas, et al. "Delayed feedback control of phase synchronisation in a neuronal network model." European Physical Journal Special Topics 227, no. 10-11 (November 2018): 1151–60. http://dx.doi.org/10.1140/epjst/e2018-800031-y.

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25

Shi, Guoyong. "Regression model based consensus for clock synchronisation of wireless sensor network." International Journal of Sensor Networks 26, no. 3 (2018): 162. http://dx.doi.org/10.1504/ijsnet.2018.090143.

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26

Marshall, B., H. T. Holwerda, and P. C. Struik. "Synchronisation of tuber growth in potato (Solanum tuberosum): a statistical model." Field Crops Research 32, no. 3-4 (March 1993): 343–57. http://dx.doi.org/10.1016/0378-4290(93)90041-k.

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27

Bronski, Jared C., Thomas E. Carty, and Lee DeVille. "Synchronisation conditions in the Kuramoto model and their relationship to seminorms." Nonlinearity 34, no. 8 (July 2, 2021): 5399–433. http://dx.doi.org/10.1088/1361-6544/abf9ed.

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28

Karthikeyan, Anitha, and Karthikeyan Rajagopal. "Network Dynamics of a Fractional-Order Phase-Locked Loop with Infinite Coexisting Attractors." Complexity 2020 (September 2, 2020): 1–11. http://dx.doi.org/10.1155/2020/7902474.

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We have investigated a fractional-order phase-locked loop characterised by a third-order differential equation. The integer-order mathematical model of the phase-locked loop (PLL) is first converted to fractional order using the Caputo-Fabrizio method. The stability of the equilibrium points is discussed in detail in both parameter and fractional-order domain. The proposed fractional-order phase-locked loop (FOPLL) model shows multiple coexisting attractors which was not discussed in the earlier literature of PLL. The significance of these infinite coexisting attractors is that they exist in the operation region of the PLL between [−π,π] which increases the complexity of operation of the PLLs. Mainly when such FOPLLs are used in large-scale networks, the synchronisation of the FOPLLs becomes complicated and will result in unstable control conditions. Hence, studying the network dynamics of such FOPLLs is significant which motivates us to investigate the synchronisation phenomenon of the FOPLLs constructed in a square network. We could show that, because of the multiple coexisting attractors, the FOPLLs show various synchronisation phenomena, and more importantly in the chaotic region for lower fractional-order values, we could show that the FOPLLs are synchronised and this finding is very useful to completely analyse the FOPLL networks in high-frequency operations.

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29

Michalczyk, Jerzy. "Mathematical Model of a General Motion of Vibratory Machines Driven by Motors of a Limited Power / Model matematyczny ruchu ogólnego maszyn wibracyjnych napędzanych silnikami ograniczonej mocy." Archives of Mining Sciences 58, no. 2 (June 1, 2013): 591–600. http://dx.doi.org/10.2478/amsc-2013-0041.

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The method of creating the mathematical model of over-resonant vibratory machines driven in a general motion by the inertial vibrator of a limited power is presented in the paper. This model can constitute the basis for digital simulation of single- or multi-drive vibratory machines used in industry. It allows to investigate the steady and transient states of these machines as well as to investigate the advanced problems of the free synchronisation of drives.

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van Niekerk, David D., Anna-Karin Gustavsson, Martin Mojica-Benavides, Caroline B. Adiels, Mattias Goksör, and Jacky L. Snoep. "Phosphofructokinase controls the acetaldehyde-induced phase shift in isolated yeast glycolytic oscillators." Biochemical Journal 476, no. 2 (January 31, 2019): 353–63. http://dx.doi.org/10.1042/bcj20180757.

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Abstract The response of oscillatory systems to external perturbations is crucial for emergent properties such as synchronisation and phase locking and can be quantified in a phase response curve (PRC). In individual, oscillating yeast cells, we characterised experimentally the phase response of glycolytic oscillations for external acetaldehyde pulses and followed the transduction of the perturbation through the system. Subsequently, we analysed the control of the relevant system components in a detailed mechanistic model. The observed responses are interpreted in terms of the functional coupling and regulation in the reaction network. We find that our model quantitatively predicts the phase-dependent phase shift observed in the experimental data. The phase shift is in agreement with an adaptation leading to synchronisation with an external signal. Our model analysis establishes that phosphofructokinase plays a key role in the phase shift dynamics as shown in the PRC and adaptation time to external perturbations. Specific mechanism-based interventions, made possible through such analyses of detailed models, can improve upon standard trial and error methods, e.g. melatonin supplementation to overcome jet-lag, which are error-prone, specifically, since the effects are phase dependent and dose dependent. The models by Gustavsson and Goldbeter discussed in the text can be obtained from the JWS Online simulation database: (https://jjj.bio.vu.nl/models/gustavsson5 and https://jjj.bio.vu.nl/models/goldbeter1)

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Raisbeck, G. M., F. Yiou, J. Jouzel, and T. F. Stocker. "Direct North-South synchronization of abrupt climate change record in ice cores using beryllium 10." Climate of the Past Discussions 3, no. 3 (May 11, 2007): 755–69. http://dx.doi.org/10.5194/cpd-3-755-2007.

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Abstract. A new, decadally resolved record of the 10Be peak at 41 kyr from the EPICA Dome C ice core (Antarctica) is used to match it with the same peak in the GRIP ice core (Greenland). This permits a direct synchronisation of the climatic variations around 41 kyr BP, independent of uncertainties related to the ice age-gas age difference in ice cores. Dansgaard-Oeschger event 10 is in the period of best synchronisation and is found to be coeval with an Antarctic temperature maximum. Simulations using a thermal bipolar seesaw model agree reasonably well with the observed relative climate chronology in these two cores. They also reproduce three Antarctic warming events between A1 and A2.

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Raisbeck, G. M., F. Yiou, J. Jouzel, and T. F. Stocker. "Direct north-south synchronization of abrupt climate change record in ice cores using Beryllium 10." Climate of the Past 3, no. 3 (September 7, 2007): 541–47. http://dx.doi.org/10.5194/cp-3-541-2007.

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Abstract. A new, decadally resolved record of the 10Be peak at 41 kyr from the EPICA Dome C ice core (Antarctica) is used to match it with the same peak in the GRIP ice core (Greenland). This permits a direct synchronisation of the climatic variations around this time period, independent of uncertainties related to the ice age-gas age difference in ice cores. Dansgaard-Oeschger event 10 is in the period of best synchronisation and is found to be coeval with an Antarctic temperature maximum. Simulations using a thermal bipolar seesaw model agree reasonably well with the observed relative climate chronology in these two cores. They also reproduce three Antarctic warming events observed between A1 and A2.

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Cao, Lu, Dong Qiao, Han Lei, and Gongbo Wang. "Strong Tracking Sigma Point Predictive Variable Structure Filter for Attitude Synchronisation Estimation." Journal of Navigation 71, no. 3 (January 22, 2018): 607–24. http://dx.doi.org/10.1017/s0373463317000960.

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In this paper, a novel Strong Tracking Sigma-Point Predictive Variable Structure Filter (ST-SP-PVSF) is presented as a further development of the Adaptive Predictive Variable Structure Filter (APVSF) for attitude synchronisation during Satellite Formation Flying (SFF). First, the sequence orthogonal principle is adopted to enhance the robustness of the APVSF for any nonlinear system with uncertain model errors. Then, sigma-point sampling strategies (such as unscented transfer, cubature rule and Stirling's polynomial interpolation) are introduced to extend the APVSF with the ability to capture the second central moment's information on the model errors to update the system model with higher precision. The new methodology has advantages in dealing with the various types of uncertainties or model errors compared with the APVSF. In addition, it does not need to choose the limit boundary layer ψlim it for system estimation, which reduces the sensitivity to the initial parameters and improves its adaptive ability over the APVSF. Simulations are performed to demonstrate that the proposed method is more suitable for attitude synchronisation estimation of the SFF system.

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Atan, Özkan. "Synchronisation and Circuit Model of Fractional-Order Chaotic Systems with Time-Delay." IFAC-PapersOnLine 49, no. 29 (2016): 68–72. http://dx.doi.org/10.1016/j.ifacol.2016.11.097.

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35

Bauer, M., and W. Martienssen. "Coupled circle maps as a tool to model synchronisation in neural networks." Network: Computation in Neural Systems 2, no. 4 (January 1991): 345–51. http://dx.doi.org/10.1088/0954-898x_2_4_001.

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36

Kim, Han Sol, Jin Bae Park, and Young Hoon Joo. "Fuzzy-model-based sampled-data chaotic synchronisation under the input constraints consideration." IET Control Theory & Applications 13, no. 2 (January 29, 2019): 288–96. http://dx.doi.org/10.1049/iet-cta.2018.5117.

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37

Dubromelle, Yves, Jean Pierre Prunaret, Fouzia Ounnar, and Patrick Pujo. "RFID synchronisation for ambient services in a holonic and isoarchic control model." International Journal of Radio Frequency Identification Technology and Applications 4, no. 3 (2014): 272. http://dx.doi.org/10.1504/ijrfita.2014.063925.

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38

Xiang, Ji, Yanjun Li, and Wei Wei. "Synchronisation of linear high-order multi-agent systems: an internal model approach." IET Control Theory & Applications 7, no. 17 (November 21, 2013): 2110–16. http://dx.doi.org/10.1049/iet-cta.2013.0074.

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39

Wu, Yuanqing, Hongye Su, and Zhengguang Wu. "Robust output synchronisation of non-identical linear agents via internal model principle." IET Control Theory & Applications 9, no. 12 (August 6, 2015): 1755–65. http://dx.doi.org/10.1049/iet-cta.2014.1192.

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40

BEFFARA, EMMANUEL. "Order algebras: a quantitative model of interaction." Mathematical Structures in Computer Science 28, no. 7 (February 13, 2017): 1126–68. http://dx.doi.org/10.1017/s0960129516000360.

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A quantitative model of concurrent interaction is introduced. The basic objects are linear combinations of partial order relations, acted upon by a group of permutations that represents potential non-determinism in synchronisation. This algebraic structure is shown to provide faithful interpretations of finitary process algebras, for an extension of the standard notion of testing semantics, leading to a model that is both denotational (in the sense that the internal workings of processes are ignored) and non-interleaving. Constructions on algebras and their subspaces enjoy a good structure that make them (nearly) a model of differential linear logic, showing that the underlying approach to the representation of non-determinism as linear combinations is the same.

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Szmit, Zofia, and Jerzy Warmiński. "Synchronisation phenomenon in three blades rotor driven by regular or chaotic oscillations." MATEC Web of Conferences 148 (2018): 06002. http://dx.doi.org/10.1051/matecconf/201814806002.

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The goal of the paper is to analysed the influence of the different types of excitation on the synchronisation phenomenon in case of the rotating system composed of a rigid hub and three flexible composite beams. In the model is assumed that two blades, due to structural differences, are de-tuned. Numerical calculation are divided on two parts, firstly the rotating system is exited by a torque given by regular harmonic function, than in the second part the torque is produced by chaotic Duffing oscillator. The synchronisation phenomenon between the beams is analysed both either for regular or chaotic motions. Partial differential equations of motion are solved numerically and resonance curves, time series and Poincaré maps are presented for selected excitation torques.

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Klug, Florian. "The Supply Chain Triangle: How Synchronisation, Stability, and Productivity of Material Flows Interact." Modelling and Simulation in Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/981710.

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Empirical evidence created a commonly accepted understanding that synchronisation and stability of material flows impact its productivity. This crucial link between synchronous and stable material flows by time and quantity to create a supply chain with the highest throughput rates is at the heart of lean thinking. Although this supply chain triangle has generally been acknowledged over many years, it is necessary to reach a finer understanding of these dynamics. Therefore, we will develop and study supply chains with the help of fluid dynamics. A multistage, continuous material flow is modelled through a conservation law for material density. Unlike similar approaches, our model is not based on some quasi steady-state assumptions about the stochastic behaviour of the involved supply chain but rather on a simple deterministic rule for material flow density. These models allow us to take into account the nonlinear, dynamical interactions of different supply chain echelons and to test synchronised and stable flow with respect to its potential impacts. Numerical simulations verify that the model is able to simulate transient supply chain phenomena. Moreover, a quantification method relating to the fundamental link between synchronisation, stability, and productivity of supply chains has been found.

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Behrendt, Ralf-Peter, and Claire Young. "Hallucinations in schizophrenia, sensory impairment, and brain disease: A unifying model." Behavioral and Brain Sciences 27, no. 6 (December 2004): 771–87. http://dx.doi.org/10.1017/s0140525x04000184.

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Based on recent insight into the thalamocortical system and its role in perception and conscious experience, a unified pathophysiological framework for hallucinations in neurological and psychiatric conditions is proposed, which integrates previously unrelated neurobiological and psychological findings. Gamma-frequency rhythms of discharge activity from thalamic and cortical neurons are facilitated by cholinergic arousal and resonate in networks of thalamocortical circuits, thereby transiently forming assemblies of coherent gamma oscillations under constraints of afferent sensory input and prefrontal attentional mechanisms. If perception is based on synchronisation of intrinsic gamma activity in the thalamocortical system, then sensory input to specific thalamic nuclei may merely play a constraining role. Hallucinations can be regarded as underconstrained perceptions that arise when the impact of sensory input on activation of thalamocortical circuits and synchronisation of thalamocortical gamma activity is reduced. In conditions that are accompanied by hallucinations, factors such as cortical hyperexcitability, cortical attentional mechanisms, hyperarousal, increased noise in specific thalamic nuclei, and random sensory input to specific thalamic nuclei may, to a varying degree, contribute to underconstrained activation of thalamocortical circuits. The reticular thalamic nucleus plays an important role in suppressing random activity of relay cells in specific thalamic nuclei, and its dysfunction may be implicated in the biological vulnerability to hallucinations in schizophrenia. Combined with general activation during cholinergic arousal, this leads to excessive disinhibition in specific thalamic nuclei, which may allow cortical attentional mechanisms to recruit thalamic relay cells into resonant assemblies of gamma oscillations, regardless of their actual sensory input, thereby producing an underconstrained perceptual experience.

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Webborn, Ellen, and Robert S. MacKay. "A Stability Analysis of Thermostatically Controlled Loads for Power System Frequency Control." Complexity 2017 (2017): 1–26. http://dx.doi.org/10.1155/2017/5031505.

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Thermostatically controlled loads (TCLs) are a flexible demand resource with the potential to play a significant role in supporting electricity grid operation. We model a large number of identical TCLs acting autonomously according to a deterministic control scheme to provide frequency response as a population of coupled oscillators. We perform stability analysis to explore the danger of the TCL temperature cycles synchronising: an emergent phenomenon often found in populations of coupled oscillators and predicted in this type of demand response scheme. We take identical TCLs as it can be assumed to be the worst case. We find that the uniform equilibrium is stable and the fully synchronised periodic cycle is unstable, suggesting that synchronisation might not be as serious a danger as feared. Then detailed simulations are performed to study the effects of a population of frequency-sensitive TCLs acting under real system conditions using historic system data. The potential reduction in frequency response services required from other providers is determined, for both homogeneous and heterogeneous populations. For homogeneous populations, we find significant synchronisation, but very minimal diversity removes the synchronisation effects. In summary, we combine dynamical systems stability analysis with large-scale simulations to offer new insights into TCL switching behaviour.

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Meier-Koll, A., E. Bohl, B. Schardl, and F. Novacek. "The adaptive significance of social synchronisation of ultradian behaviour cycles: a computer model." Journal of Biosocial Science 27, no. 3 (July 1995): 285–99. http://dx.doi.org/10.1017/s0021932000022811.

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SummaryDaily behaviour patterns in a hunter–gatherer community of Colombian Indians show that individual activities are regulated by ultradian behaviour cycles of about 2 hr and that these cycles can be synchronised by social interaction. A computer model was developed which simulated an artificial community and generated dynamic portraits of locomotor activity and social aggregation similar to those of the observed community of Colombian Indians. Social phase-locking of ultradian behaviour cycles occurred, contributing to the safety of group members and their economy of effort in gathering and related activities. Social synchronisation of ultradian behaviour cycles may also have occurred in early hominid groups.

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Ford, DG, VYM Castaneda, AP Longstaff, C. Pislaru, and A. Myers. "Computer numerical control vertical machining centre feed drive modelling using the transmission line technique." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 9 (August 28, 2014): 1578–99. http://dx.doi.org/10.1177/0954406214546540.

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This study presents a novel application of the Transmission Line Matrix Method (TLM) for the modelling of the dynamic behaviour of non-linear hybrid systems for computer numerical control (CNC) machine tool drives. The application of the TLM technique implies the dividing of the ball-screw shaft into a number of identical elements in order to achieve the synchronisation of events in the simulation, and to provide an acceptable resolution according to the maximum frequency of interest. This entails the use of a high performance computing system with due consideration to the small time steps being applied in the simulation. Generally, the analysis of torsion and axial dynamic effects on a shaft implies the development of independent simulated models. This study presents a new procedure for the modelling of a ball-screw shaft by the synchronisation of the axial and torsion dynamics into the same model. The model parameters were obtained with equipments such as laser interferometer, ball bar, electronic levels, signal acquisition systems, etc. The MTLM models for single and two-axis configurations have been simulated and matches well with the measured responses of machines. The new modelling approach designated the Modified Transmission Line Method (MTLM) extends the TLM approach retaining all its inherent qualities but gives improved convergence and processing speeds. Further work since, not the subject of this paper, have identified its potential for real-time application.

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Cumin, D., and C. P. Unsworth. "Generalising the Kuramoto model for the study of neuronal synchronisation in the brain." Physica D: Nonlinear Phenomena 226, no. 2 (February 2007): 181–96. http://dx.doi.org/10.1016/j.physd.2006.12.004.

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Fonoberova, Maria, Igor Mezić, Jadranka Mezić, James Hogg, and Jason Gravel. "Small-world networks and synchronisation in an agent-based model of civil violence." Global Crime 20, no. 3-4 (September 16, 2019): 161–95. http://dx.doi.org/10.1080/17440572.2019.1662304.

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Yang, Ying bao, Chang ping Liu, Bing Yang, Gang Zhao, and Ming hua Hu. "A cluster collaborative synchronisation dynamic model of the dissipative coupling supply chain network." International Journal of Security and Networks 15, no. 4 (2020): 214. http://dx.doi.org/10.1504/ijsn.2020.10033127.

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Yang, Bing, Gang Zhao, Ming hua Hu, Chang ping Liu, and Ying bao Yang. "A cluster collaborative synchronisation dynamic model of the dissipative coupling supply chain network." International Journal of Security and Networks 15, no. 4 (2020): 214. http://dx.doi.org/10.1504/ijsn.2020.111132.

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