Relevant bibliographies by topics / Delayed coupling

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Delayed coupling'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Delayed coupling"

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Wang, Guoliang, Zhongbao Yue, and Feng Wang. "New Pinning Synchronization of Complex Networks with Time-Varying Coupling Strength and Nondelayed and Delayed Coupling." Abstract and Applied Analysis 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/989201.

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The pinning synchronization problem for a class of complex networks is studied by a stochastic viewpoint, in which both time-varying coupling strength and nondelayed and delayed coupling are included. Different from the traditionally similar methods, its interval is separated into two subintervals and described by a Bernoulli variable. Both bounds and switching probability of such subintervals are contained. Particularly, the nondelayed and delayed couplings occur alternately in which another independent Bernoulli variable is introduced. Then, a new kind of pinning controller without time-varying coupling strength signal is developed, in which only its bounds and probabilities are contained. When such probabilities are unavailable, two different kinds of adaption laws are established to make the complex network globally synchronous. Finally, the validity of the presented methods is proved through a numerical example.
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Morelli, Luis G., Saúl Ares, Leah Herrgen, Christian Schröter, Frank Jülicher, and Andrew C. Oates. "Delayed coupling theory of vertebrate segmentation." HFSP Journal 3, no. 1 (February 2009): 55–66. http://dx.doi.org/10.2976/1.3027088.

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Siewe, Raoul Thepi, Alain Francis Talla, and Paul Woafo. "Experimental Synchronization of Two Van der Pol Oscillators with Nonlinear and Delayed Unidirectional Coupling." International Journal of Nonlinear Sciences and Numerical Simulation 18, no. 6 (October 26, 2017): 515–23. http://dx.doi.org/10.1515/ijnsns-2017-0024.

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AbstractThis paper presents the experimental investigation on synchronization of two Van der Pol oscillators with polynomial and delay unidirectional couplings. The intervals of coupling coefficients and delay leading to synchronization are determined experimentally using analog electronic circuits. Three cases are considered: autonomous Van der Pol oscillators, sinusoidally exited Van der Pol oscillators in the chaotic state and Van der Pol oscillators with two slowly sinusoidal excitations delivering periodic patterns of periodic pulses. It is found that the degree of the polynomial coupling reduces the intervals of coupling coefficients leading to synchronization and the delay affects the coupling intervals in a periodic way. The experimental results agree well with the results of the theoretical (mathematical and numerical) investigation.
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Zheng, Song, Gaogao Dong, and Qinsheng Bi. "Impulsive synchronization of complex networks with non-delayed and delayed coupling." Physics Letters A 373, no. 46 (November 2009): 4255–59. http://dx.doi.org/10.1016/j.physleta.2009.09.043.

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Wu, Zhaoyan. "Synchronization of discrete dynamical networks with non-delayed and delayed coupling." Applied Mathematics and Computation 260 (June 2015): 57–62. http://dx.doi.org/10.1016/j.amc.2015.03.044.

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Li, Wang, Yongzheng Sun, Youquan Liu, and Donghua Zhao. "Analyzing synchronization of time-delayed complex dynamical networks with periodic on-off coupling." International Journal of Modern Physics B 31, no. 28 (November 9, 2017): 1750210. http://dx.doi.org/10.1142/s0217979217502101.

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We investigate the synchronization of time-delayed complex dynamical networks with periodic on-off coupling. We derive sufficient conditions for the complete and generalized outer synchronization. Both our analytical and numerical results show that two time-delayed networks can achieve outer synchronization even if the couplings between the two networks switch off periodically. This synchronization behavior is largely dependent of the coupling strength, the on-off period, the on-off rate and the time delay. In particular, we find that the synchronization time nonmonotonically increases as the time delay increases when the time delay step is not equal to an integer multiple of the on-off period.
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Sharma, Amit, Manish Dev Shrimali, Awadhesh Prasad, and Ram Ramaswamy. "Time-delayed conjugate coupling in dynamical systems." European Physical Journal Special Topics 226, no. 9 (June 2017): 1903–10. http://dx.doi.org/10.1140/epjst/e2017-70026-4.

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Czumaj, Artur, and Miros?aw Kuty?owski. "Delayed path coupling and generating random permutations." Random Structures and Algorithms 17, no. 3-4 (2000): 238–59. http://dx.doi.org/10.1002/1098-2418(200010/12)17:3/4<238::aid-rsa4>3.0.co;2-e.

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Campbell, Sue Ann, R. Edwards, and P. van den Driessche. "Delayed Coupling Between Two Neural Network Loops." SIAM Journal on Applied Mathematics 65, no. 1 (January 2004): 316–35. http://dx.doi.org/10.1137/s0036139903434833.

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Guo, Wanli, Francis Austin, Shihua Chen, and Wen Sun. "Pinning synchronization of the complex networks with non-delayed and delayed coupling." Physics Letters A 373, no. 17 (April 2009): 1565–72. http://dx.doi.org/10.1016/j.physleta.2009.03.003.

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Dissertations / Theses on the topic "Delayed coupling"

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Su, Mingjuan. "Palladium-catalyzed C-N cross-coupling and application to the synthesis of delayed singlet emitters for OLED development." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/91115.

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Thesis: Ph. D. in Organic Chemistry, Massachusetts Institute of Technology, Department of Chemistry, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references.
The studies in the present dissertation were aimed at developing and applying synthetic methods mediated by palladium catalysis. In Chapters 1 and 2, the palladium-catalyzed amidation and amination of five-membered heterocyclic bromides containing multiple heteroatoms are described. These methods provide efficient access to N-arylated imidazoles and pyrazoles in moderate to excellent yields. In Chapter 3, a series of novel triptycene-based compounds were synthesized using a palladium-catalyzed C-N, C-C, C-N cross-coupling sequence. Experimental results suggest that this series of compounds could potentially be used as delayed singlet emitters for organic light emitting devices. Chapter 1. Palladium-Catalyzed Amidation of Five-Membered Heterocyclic Bromides Palladium-catalyzed C-N cross-coupling between primary amides and five-membered heterocyclic bromides that contain multiple heteroatoms was achieved for the first time using the Pd/AdBrettPhos catalyst system. This system allows for efficient access to Narylated imidazoles, pyrazoles, thiazoles, pyrroles, and thiophenes in moderate to excellent yield. Experimental results and DFT calculations point to the need for electronrich and especially sterically demanding biaryl dialkylphosphine ligands to promote these difficult cross-coupling reactions. The same protocol was also extended to forming tertiary amides from secondary amides and five-membered heterocyclic bromides. Preliminary studies showed promising results using a Pd/AdRockPhos catalyst system. Chapter 2. Palladium-Catalyzed Amination of Unprotected Five-Membered Heterocyclic Bromides An efficient method for the palladium-catalyzed amination of unprotected bromoimidazoles and bromopyrazoles is presented. The transformation is facilitated by the use of our newly developed Pd-precatalyst based on the bulky biarylphosphine ligand, tBuBrettPhos. The mild reaction conditions employed allow for the preparation of a broad scope of aminoimidazoles and aminopyrazoles in moderate to excellent yields. Chapter 3. Synthesis of Delayed Singlet Emitters for OLED Development The development of novel thermally activated delayed fluorescence (TADF) materials for use in organic light emitting devices (OLEDs) is reported. A series of triptycenebased delayed singlet emitters have been synthesized using a palladium-catalyzed C-N, C-C, C-N cross-coupling sequence. Preliminary investigations have demonstrated that these compounds could serve as delayed singlet emitters at a range of wavelengths from orange to blue, which is highly desirable for organic electronics applications.
by Mingjuan Su.
Ph. D. in Organic Chemistry
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Sombut, Panukorn. "Excited state energy surfaces of flexible emitters for thermally activated delayed fluorescence." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18624/.

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Organic Light-Emitting Diodes (OLEDs) technology has matured over recent years, reaching the commercialization level and being used in various applications. The required efficiency can be achieved by transforming triplet excitons into singlet states via Reverse InterSystem Crossing (RISC), which a general mechanism called thermally activated delayed fluorescence (TADF). Two prototypical molecules in the field, 2CzBN and 4CzBN, Carbazole Benzonitrile (donor-acceptor) derivatives, possess similar energy gap between singlet and triplet (∆EST, a key parameter in the RISC rate), but different TADF performance. In this sense, other parameter must be considered to explain these different behaviors. In this work, we theoretically investigate 2CzBN and 4CzBN and address the problem of how flexible donor-acceptor (D-A) or donor-acceptor-donor (D-A-D) molecular architectures affect the nature of excited state, and the oscillator strength. Furthermore, we analyze the RISC rates as a function of the conformation of the carbazole side groups, considering the S0, S1, T1 and T2 states. The oscillator strength of 4CzBN is higher than of 2CzBN, which, in turn, is almost vanishing, resulting in only 4CzBN being a TADF active molecule. We also note the presence of a second triplet state T2 lower in energy than S1, and that the reorganization energies, associated to the RISC processes involving T1 and T2, are both important factor in differentiating the rates in 2CzBN and 4CzBN. However, the 4CzBN RISC rate from T2 to S1 is surprisingly high with respect to the one from T1 to S1, although, according to EL-Sayed rules, since T2 (CT/LE) is more similar to S1 (CT) than in 2CzBN (LE, CT), this transition should be less favored. These insights are important to understand the photophysics of the TADF process and to design novel TADF emitters based on the benzo-carbazole architecture.
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Plummer, Bradley N. "Spontaneous Calcium Oscillations During Diastole in the Whole Heart: The Influence of Ryanodine Reception Function and Gap Junction Coupling." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1291050320.

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Herrgen, Leah. "The Regulation of Segmentation Clock Period in Zebrafish." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1228749843309-64183.

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Oscillations are present at many different levels of biological organization. The cell cycle that directs the division of individual cells, the regular depolarization of neurons in the sinu-atrial node which underlies the regular beating of the heart, the circadian rhythms that govern the daily activity cycles of virtually all organisms, and the clocks that make entire populations of fireflies flash on and off in unison feature as prominent examples of biological clocks. During development, biological clocks regulate the patterning of growing tissues, as is the case in vertebrate somitogenesis, and potentially also in vertebrate limb outgrowth and axial segmentation of invertebrate embryos. During vertebrate segmentation, the embryonic axis is subdivided along its anterior-posterior axis into epithelial spheres of cells called somites. This rhythmic process is thought to be driven by a multicellular oscillatory gene network, the so-called segmentation clock. Oscillations of hairy and enhancer of split gene products have been proposed to constitute the core clockwork in individual cells, and these oscillators are coupled to each other by Delta-Notch intercellular signaling. The interaction of the segmentation clock with a posteriorly-moving arrest wavefront then translates the temporal information encoded by the clock into a spatial pattern of segments. In the framework of this Clock and Wavefront model, segment length is determined by both clock period and arrest wavefront velocity. How the period of the segmentation clock is regulated is presently unknown, and understanding the mechanism of period setting might yield insight into the nature and function of the segmentation clock. In this study, two different but complementary approaches were pursued to investigate how period is regulated in the zebrafish segmentation clock. First, it has been reported that zebrafish mind bomb (mib) mutant embryos form somites more slowly than their wt siblings, suggesting that Mib might be implicated in period setting. Mib is an E3 ubiquitin ligase required for ubiquitination and endocytosis of the Notch ligand Delta, and Notch signaling is impaired in mutants with defective Mib. It has been suggested that the mechanistic basis for the requirement of Delta endocytosis in Notch signaling is a need for Delta to enter a particular endocytic compartment, potentially a recycling endosome, in a ubiquitin-dependent manner, where its signaling ability might be established or amplified by an as yet unknown posttranslational modification. In the present study, Delta trafficking through the endocytic pathway was analyzed in the PSM of wt and mib embryos through colocalization studies with endocytic markers. The rationale of this approach was that if Delta gained access to a particular endocytic compartment through Mib-dependent endocytosis, the presence of Delta in this compartment would be expected to be reduced in mutants with defective Mib, thereby revealing the compartment’s identity. However, no qualitative changes in colocalization with different endocytic markers could be detected in mib mutants, and the methods available did not allow for quantification of colocalization in wt or mutant backgrounds. However, Delta colocalized with 13 markers of recycling endosomes, consistent with the hypothesis that these are functionally important in Notch signaling. More refined techniques will be necessary for a quantitative analysis of normal as compared to impaired Delta trafficking. A genetic approach to period regulation proved to be successful for the Drosophila circadian clock, where the identification of period mutants advanced the understanding of the clock’s genetic circuitry. This motivated a screen for period mutants of the segmentation clock, which was carried out by measuring somitogenesis period, segment length and arrest wavefront velocity in a pool of candidate mutants. A subset of Delta-Notch mutants, and embryos treated with a small-molecule inhibitor that impairs Notch signaling, displayed correlated increases in somitogenesis period and segment length, while there was no detectable change in arrest wavefront velocity. Combined, these findings suggested that segmentation clock period is increased in experimental conditions with impaired Delta-Notch signaling. Using a theoretical description of the segmentation clock as an array of coupled phase oscillators, the delay in the coupling and the autonomous frequency of individual cells were estimated from the direction and magnitude of the period changes. The mutants presented here are the first candidates for segmentation clock period mutants in any vertebrate. The nature of the molecular lesions in these mutants, all of which affect genes implicated in intercellular Delta-Notch signaling, suggests that communication between oscillating PSM cells is a key factor responsible for setting the period of the segmentation clock.
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Qu, Yangyang. "Design, synthèse et caractérisation de dérivés aromatiques et hétérocycliques électrodéficitaires." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLN051/document.

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Cette thèse porte sur la conception, la synthèse et la caractérisation de nouveaux dérivés accepteurs d'électrons. Elle se concentre sur l’étude des dérivés de la 1,2,4,5-tétrazine, mais contient également l’étude de dérivés du benzonitrile, précurseurs typiques de la préparation des 1,2,4,5-tétrazines et de dérivés de la pyridazine, les produits dérivés de la réaction de Diels – Alder à Demande Inverse (IEDDA) des dérivés de la tétrazine. De plus, les dérivés de 1,2,3,4-thiatriazole, en tant que produits imprévus de la synthèse de Pinner modifiée, sont également étudiés de manière approfondie. En raison des états de transfert de charge (CT) introduits dans le système donneur-accepteur, les dérivés préparés accepteur d'électrons présentent en général des propriétés photophysiques et électrochimiques intéressantes, et ont donc un intérêt particulier pour l'électronique organique.Le point culminant de cette thèse est le développement de méthodologies synthétiques dans chaque chapitre. En résumé, le chapitre 2 met en évidence une nouvelle approche synthétique sans métal pour les 1,2,4,5-tétrazines 3-monosubstituées, qui sont très utiles pour la chimie du click bioorthogonal. Le chapitre 3 décrit une stratégie de synthèse élaborée pour de nouveaux dérivés de benzonitrile donneur-accepteur qui présentent de la TADF, de l’ AIE et du mécanochromisme. Le chapitre 4 présente une étude détaillée de la réaction de couplage croisé Buchwald – Hartwig en tant que méthodologie de synthèse importante dans la synthèse de molécules de tétrazine. Le chapitre 5 décrit l'étude de la réaction à l'IEDDA comme un outil synthétique utile pour préparer des dérivés de pyridazine. Le chapitre 6 présente une nouvelle synthèse pratique de 1,2,3,4-thiatriazoles à partir de composés nitriles
This PhD thesis deals with the design, synthesis and characterization of novel electron-acceptor derivatives. It is focused on the study of 1,2,4,5-tetrazine derivatives, but also involves the study of benzonitrile derivatives which are the typical precursors for the preparation of 1,2,4,5-tetrazines, and pyridazine derivatives which are the products derived from Inverse Electron Demand Diels–Alder (IEDDA) reaction of tetrazine derivatives. Moreover, 1,2,3,4-thiatriazole derivatives, as unpredicted products from modified Pinner synthesis, are also elaborately investigated. Due to the charge-transfer (CT) states introduced in the donor-acceptor system, the prepared electron-acceptor derivatives exhibit interesting photophysical and electrochemical properties, and therefore are of particular interest in organic electronics.The highlight of this thesis is the development of synthetic methodologies in each chapter. To sum up, Chapter 2 demonstrates a novel metal-free synthetic approach to 3-monosubstituted 1,2,4,5-tetrazines, which are highly useful for bioorthogonal click chemistry. Chapter 3 describes an elaborative synthetic strategy for novel donor-acceptor benzonitrile derivatives which exhibit TADF, AIE and mechanochromism. Chapter 4 presents a detailed study of Buchwald–Hartwig cross-coupling reaction as an important synthetic methodology in the synthesis of tetrazine molecules. Chapter 5 described the study of IEDDA reaction as a useful synthetic tool to prepare pyridazine derivatves. Chapter 6 presented a novel convenient one-pot synthesis of 1,2,3,4-thiatriazoles directly from nitrile compounds
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Gu, Yushan. "Experimental pore scale analysis and mechanical modeling of cement-based materials submitted to delayed ettringite formation and external sulfate attacks." Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC2075/document.

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Ce travail de recherche a pour but d’étudier des matériaux cimentaires soumis à des attaques sulfatiques selon trois différentes conditions : attaques sulfatiques externes (ASE), formation différée d’ettringite communément appelée attaque sulfatique interne et l’effect couplé des deux réactions, ainsi que de proposer un mécanisme uniforme pour les dégradations causées par ces réactions. En se basant sur le mécanisme proposé, un model poro-mécanique est proposé pour simuler l’expansion induite par les produits expansifs néoformés pendant la dégradation. Cette étude inclut trois parties : dans la première partie, les dégradations des éprouvettes de pâte de ciment correspondant à deux types de ciments (CEM I et CEM III) et deux dimensions exposées à trois différents types d’attaques sulfatiques (ASE, ASI, et le couplage des deux réactions), sont étudiés et comparés : variations de longueur, de masse, ainsi que des observations visuelles. Les éprouvettes exposées au couplage ASE-ASI montrent la cinétique d’expansion la plus rapide et le degré de dégradation le plus important, comparé aux autres cas. Ensuite, la structure poreuse des pâtes de ciment avant et après les attaques sulfatiques est caractérisée en utilisant différentes techniques : porosimétrie à mercure (MIP), sorption dynamique de vapeur (DVS), porosité accessible à l’eau ou essais de dissolution par traitement thermique. En comparant les variations de la distribution de la taille des pores des pâtes de ciment exposées à différentes conditions, les cristaux néoformés se trouvent précipités à la fois dans les pores capillaires et les pores des C-S-H. En plus de l’évolution de la distribution de la taille des pores pendant l’ASI, un mécanisme de dégradation est proposé : les cristaux néoformés (l’ettringite) sont précipités dans les grands pores, sans provoquer une expansion manifeste, et ils sont ensuite précipités dans les pores capillaires et les pores des C-S-H, ce qui induit un gonflement. Par ailleurs, le volume des pores occupé par les produits de l’ASI sont libérés après des essais de dissolution par traitement thermique, ce qui confirme la formation de produits d’expansion dans cette gamme de pores. Enfin, en se basant sur les résultats expérimentaux montrant que l’ettringite se forme en allant des grands pores vers les plus petits, un model poro-mécanique est proposé pour simuler l’expansion des matériaux cimentaires soumis à des attaques sulfatiques. Le modèle est basé sur la croissance contrôlée en surface et les propriétés physicochimiques pour l’ASE et l’ASI, malgré les différences entre ces deux réactions. Deux constantes indépendantes : ai et ap sont proposées pour représenter la cinétique de l’invasion des cristaux et la déformation. De plus, le modèle peut être couplé avec toutes les théories mécaniques, par exemple : l’élasticité, la plasticité, la théorie de l’endommagement ou autres. Le modèle illustre bien le processus de cristallisation et il prédit l’expansion correspondante à la fois à l’ASE et l’ASI
This work aims to study cement-based materials subjected to sulfate attacks in three different conditions: External Sulfate Attack (ESA), Delayed Ettringite Formation (DEF) and the Coupling effect of both, and to propose the same damage mechanism for all of them. Based on the proposed mechanism, a poromechanical model is established to simulate the expansion induced by expansive crystals during the degradation. The study includes the following three parts. In the first part, the degradation of cement paste specimens with two kinds of cement type (CEM I and CEM III) and two dimensions (2 2 12 cm3 and 11 11 22 cm3) exposed to three sulfate attack conditions (ESA, DEF, and Coupling effect) are studied and compared, including the length variation, mass variations, and observations. The specimens exposed to the coupling effect show the fastest kinetics and the most serious degree of degradation compared to the other cases. Then, the pore structure of cement pastes before and after sulfate attacks is characterized via different techniques: MIP, DVS, water accessible tests and heat-based dissolution tests. By comparing the variation of pore size distribution of cement pastes exposed to different conditions, the generated crystals are found to be precipitated both in capillary and gel pores. In addition to the evolution of pore size distribution during DEF, a damage mechanism is proposed: the generated crystals (ettringite) precipitate in the big pores without inducing an obvious expansion, and then penetrate into capillary and gel pores, which leads to a swelling. Moreover, the pore volume occupied by DEF induced products is released after heat-based dissolutiontests, which further confirms the formation of expansive products in that porerange. Finally, based on the experimental conclusion that ettringite forms through the large to small pores in all cases, a poromechanical model is proposed to simulate the expansion of cement-based materials submitted to sulfate attacks. The model is based on the surface-controlled growth and physicochemical properties both for ESA and DEF, despite the different source of sulfate ions. Two independent constants, ai and ap, are proposed to represent the kinetics of crystal invasion and deformation. Moreover, the model could be coupled with any mechanical theories, e.g. elasticity, plasticity, damage theory or any other. The model well illustrates the crystallization process and well predicts the corresponding expansion both in ESA and DEF
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Maia, Marcos Daniel Nogueira. "Synchronization and control in networks with strongly time-delayed couplings." Instituto Nacional de Pesquisas Espaciais (INPE), 2017. http://urlib.net/sid.inpe.br/mtc-m21b/2017/09.12.20.07.

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The stability of synchronization and control in networks of dynamical systems with strongly delayed connections is investigated. Strict conditions for both, synchronization of stable periodic and equilibrium solutions , and control of unstable equilibrium are obtained. With a network model including self-feedback delay, the existence of a critical coupling strength kc is demonstrated, which is related to the network structure, isolated vector field and coupling function, such that for large delay and coupling strength k < kc the network undergoes to stable synchronization. Moreover, it is derived that for heterogeneous networks, kc $\rightarrow$ 0 as the network size grows to infinity, unless the coupling parameter scales with the maximum degree. In contrast, for random networks, the interval of coupling strengths that leads to stable synchronization is the maximum possible when the connectivity threshold is crossed making the network connected. Based on the network structure, the scaling of the coupling parameter, which allows for a synchronization, is derived. And, with a network model consisting of instantaneous self-connections, it is shown that it is possible to stabilize synchronous equilibrium that is unstable in an isolated system. Such a control close to a Hopf bifurcation is studied in details and strict conditions for the stability are obtained. In particular, it is demonstrated that the stabilization domains in parameter space are reappearing periodically and decreasing in size with the increase of time-delays. Also, the frequency of the reappearance of the control domains and the number spectral roots of the adjacency matrix are closely dependent, for instance, the number of cycle multi-partitions of the graph indicates the reappearance frequency of the control domains.
Nesta tese investiga-se a estabilidade da sincronização e o controle em redes de sistemas dinâmicos onde o acoplamento se dá com atraso grande. São obtidas condições analíticas para ambos, a saber, sincronização de soluções periódicas e equilíbrios estáveis e controle de equilíbrio instáveis. Com um modelo de rede que inclui atraso com auto-alimentação, mostra-se a existência de um parâmetro crítico de acoplamento, kc, que depende apenas da estrutura da rede, do campo de vetores e da função de acoplamento, tal que para atraso grande e parâmetro de acoplamento k < kc a rede apresenta uma sincronização estável. Além disso, mostra-se que para redes heterogêneas, kc $\rightarrow$ 0 ao passo que o número de nós da rede cresce ao infinito, a menos que o parâmetro de acoplamento é escalonado com o grau máximo da rede. Em contrapartida, evidencia-se que para redes aleatórias, o intervalo de parâmetros de acoplamento que induzem sincronização estável é o máximo possível quando o limiar de conectividade da rede é atingindo fazendo com que a mesma se torne conectada. Baseando-se na estrutura da rede, propriedades de escalonamento do parâmetro de acoplamento são derivadas, permitindo sincronização estável. E, com um modelo de rede consistindo de auto-alimentação instantânea, verifica-se que é possível estabilizar soluções de equilíbrio que são instáveis no sistema isolado. Este cenário de controle quando o sistema isolado está próximo da bifurcação de Hopf é estudado em detalhes e então condições analíticas para a estabilidade são obtidas. Em particular, demonstra-se que os domínios de estabilização no espaço de parâmetros são periódicos e decrescentes ao passo que o atraso cresce. Além disso, evidencia-se como a frequência de reaparecimento de tais domínios é influenciada pelo número de raízes espectrais da matriz de adjacência do grafo, que por sua vez está relacionado com, por exemplo, as multipartições cíclicas do grafo.
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Yoshioka, Kumiko. "Coupling delay controls synchronized oscillation in the segmentation clock." Kyoto University, 2020. http://hdl.handle.net/2433/253153.

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Heiligenthal, Sven [Verfasser], and Wolfgang [Akademischer Betreuer] Kinzel. "Strong and Weak Chaos in Networks of Semiconductor Lasers with Time-Delayed Couplings / Sven Heiligenthal. Betreuer: Wolfgang Kinzel." Würzburg : Universitätsbibliothek der Universität Würzburg, 2013. http://d-nb.info/1035370905/34.

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Murugesan, Manju Shrii. "Delay effects on synchronization in networks of dynamical systems." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16851.

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In dieser Dissertation werden wir die Wirkung der Verzögerung Kupplung auf Netzwerke von chaotischen erkunden dynamischer Systeme mit dem Rahmen der Master Stabilität Formalismus. Wir werden untersuchen das Phänomen der Verzögerung-verstärkter und Verzögerungen-induzierte stabile Synchronisation in einer willkürlichen Verzögerung gekoppelt Netzwerk von zeitkontinuierlichen dynamischen Systemen. Wir demonstrieren, dass es immer existieren eine erweiterte Regime des stabilen synchronen Zustand als eine Funktion der Kopplungsstärke geeignete Verbindung Verzögerungen, die nicht ohne Verzögerung in die Kupplung beobachtet werden kann. Wir schlagen eine partielle verzögerung Verbindung als eine Kombination von sowohl den momentanen und der komplett Verzögerung Verbindung mit gewissen Gewichten Bestimmung ihrer Beiträgen. Wir werden zeigen, dass die partielle Verzögerung Verbindung beide Grenzfälle des momentanen und der komplett Verzögerung Kupplung am synchronizabilit von Netzwerken übertrifft. Der Rahmen fuer Master Stabilität Formalismus ist mit einem Netzwerk von intrinsischen Zeitverzögerung Systeme, deren Knoten Dynamik durch Verzögerung Differentialgleichungen beschrieben erweitert, zum ersten Mal in der Literatur und veranschaulicht das allgemeine Verhalten des Master-Stabilisierungsfunktion in Netzwerken skalare Zeit Einschaltverzögerung Systeme auf den Synchronisations-Eigenschaften des Netzes. Außerdem untersuchen wir das Zusammenspiel von Lärm und verzögert in das Phänomen der Lärmverstärkter Phasensynchronisierung in beiden unidirektional und bidirektional gekoppelt zeitverzögerung systeme.
In this thesis, we will explore the effect of delay coupling on networks of chaotic dynamical systems using the framework of master stability formalism. We will investigate the phenomenon of delay-enhanced and delay-induced stable synchronization in an arbitrary delay coupled network of time-continuous dynamical systems. We will demonstrate that there always exist an extended regime of stable synchronous state as a function of coupling strength for appropriate coupling delays, which cannot be observed without any delay in the coupling. We will also propose a partial delay coupling as a combination of both the instantaneous and the completely delay coupling with certain weights determining their contributions. We will show that the partial delay coupling outperforms both limiting cases of the instantaneous and the completely delay coupling on the synchronizability of networks. The framework of master stability formalism is extended to a network of intrinsic time-delay systems, whose node dynamics are described by delay differential equations, for the first time in the literature and illustrated the generic behavior of the master stability function in networks of scalar time-delay systems based on the synchronization properties of the network. We also investigate the interplay of noise and delay in the phenomenon of noise-enhanced phase synchronization in both unidirectionally and bidirectionally coupled time-delay systems.
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Books on the topic "Delayed coupling"

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Nijmeijer, Henk, Erik Steur, and Toshiki Oguchi. Synchronization of Systems with Time-Delayed Coupling. World Scientific Publishing Co Pte Ltd, 2016.

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Book chapters on the topic "Delayed coupling"

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Klinshov, Vladimir, Dmitry Shchapin, Serhiy Yanchuk, and Vladimir Nekorkin. "Dynamics of Oscillatory Networks with Pulse Delayed Coupling." In Nonlinear Systems and Complexity, 219–46. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58062-3_9.

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Niebur, Ernst, Heinz G. Schuster, and Daniel M. Kammen. "Systems of Relaxation Oscillators with Time-Delayed Coupling." In Neural Network Dynamics, 226–33. London: Springer London, 1992. http://dx.doi.org/10.1007/978-1-4471-2001-8_16.

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Cai, Guoliang, Hao Ma, and Yuxiu Li. "Adaptive Projective Synchronization and Function Projective Synchronization of Chaotic Neural Networks with Delayed and Non-delayed Coupling." In Advances in Neural Networks – ISNN 2012, 293–301. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31346-2_33.

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Steur, Erik, and Henk Nijmeijer. "Network Topology and Synchronization of Systems with Linear Time-Delayed Coupling." In Mathematical Control Theory I, 321–41. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20988-3_17.

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Wu, Hongli, Ya-peng Zhao, Huan-huan Mai, and Zheng-xia Wang. "A Delay Fractioning Approach to Global Synchronization of Delayed Complex Networks with Neutral-Type Coupling." In Advances in Intelligent Systems and Computing, 221–42. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03449-2_22.

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Li, Yuxiu, and Guoliang Cai. "Projective Synchronization for Complex Dynamical Networks of Non-delayed and Delayed Coupling with Different Scale Factors via Impulsive Control." In Algorithms and Architectures for Parallel Processing, 654–66. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-27140-8_45.

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Wu, Wei, and Tianping Chen. "Asymptotic Synchronization for Pulse-Coupled Oscillators with Delayed Excitatory Coupling Is Impossible." In Advances in Soft Computing, 45–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03156-4_5.

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Kirrou, Ilham, and Mohamed Belhaq. "Quasiperiodic Stability Diagram in a Nonlinear Delayed Self-Excited Oscillator Under Parametric Coupling." In Mechanisms and Machine Science, 49–64. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60694-7_3.

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Murakami, Makoto, Terumi Kambe-Ohkura, and Ichiro Kudo. "Functional coupling between Phospholipase a2s and cyclooxygenases in immediate and delayed prostanoid biosynthetic pathways." In Advances in Experimental Medicine and Biology, 15–19. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0193-0_3.

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Monger, Bruce C., Janet M. Fischer, Brian A. Grantham, Vicki Medland, Bing Cai, and Kevin Higgins. "Frequency Response of a Simple Food-Chain Model with Time-Delayed Recruitment: Implications for Abiotic-Biotic Coupling." In Structured-Population Models in Marine, Terrestrial, and Freshwater Systems, 433–50. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5973-3_14.

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Conference papers on the topic "Delayed coupling"

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Gao, Yanbo, Binghua Sun, and Zhenjuan Zhang. "Synchronization of Delayed Lur'e complex dynamical networks with delayed coupling." In 2017 11th Asian Control Conference (ASCC). IEEE, 2017. http://dx.doi.org/10.1109/ascc.2017.8287541.

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Hongjie Li. "Adaptive synchronization of complex dynamical networks with non-delayed and delayed coupling." In 2010 Chinese Control and Decision Conference (CCDC). IEEE, 2010. http://dx.doi.org/10.1109/ccdc.2010.5498434.

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Cai, Guoliang, Yihong Du, and Xianbin Wu. "Global Exponential Synchronization of Chaotic Networks with Non-delayed and Double-Delayed Coupling." In 2012 Fifth International Conference on Information and Computing Science (ICIC). IEEE, 2012. http://dx.doi.org/10.1109/icic.2012.26.

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Thomas, Sindhura Rose, Usha Nair, and Bindu M. Krishna. "Effect of delayed coupling in power system dynamics." In 2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT). IEEE, 2018. http://dx.doi.org/10.1109/iccpcct.2018.8574262.

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Tang, Ze, Jianwen Feng, and Yi Zhao. "Cluster Synchronization of Complex Networks with Non-delayed and Delayed Coupling under Pinning Control." In 2012 Eighth International Conference on Computational Intelligence and Security (CIS). IEEE, 2012. http://dx.doi.org/10.1109/cis.2012.45.

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Zhang, Hua, Lan Xiang, Quanjun Wu, and Jin Zhou. "Synchronization in complex delayed dynamical networks with intermittent coupling." In 2011 23rd Chinese Control and Decision Conference (CCDC). IEEE, 2011. http://dx.doi.org/10.1109/ccdc.2011.5968527.

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Ding, Xiaoshuai, and Jinde Cao. "Global dissipativity of fractional-order delayed neural networks with coupling." In 2017 International Workshop on Complex Systems and Networks (IWCSN). IEEE, 2017. http://dx.doi.org/10.1109/iwcsn.2017.8276530.

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Fang, Luxian, and Yue-Hui Zhao. "Passivity analysis of complex delayed dynamical networks with output coupling." In 2014 33rd Chinese Control Conference (CCC). IEEE, 2014. http://dx.doi.org/10.1109/chicc.2014.6897081.

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Wang, Zaihua, and Haiyan Hu. "An Energy Analysis of Amplitude Death of a Pair of Oscillators With Delayed Coupling." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84437.

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This paper presents an energy analysis of the amplitude death, a phenomenon that the individual oscillators cease to oscillate when coupled and go to an equilibrium motion instead, of a pair of coupled oscillators with time delay that are slightly perturbed from two undamped oscillators and with delayed coupling. The energy analysis reveals that amplitude death, as well as the stability of the phase-locked periodic solutions, can be justified by the sign of the averaged total powers along a special function with harmonic entries, rather than along arbitrary solution of the coupled oscillators as in the application of the method of Lyapunov’s function for stability analysis. An illustrative example is given to show the effectiveness of the present method.
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Ji, Lin, and Jia Zhang. "The Influence of Delayed Coupling and Noise on Ca2+ Oscillatory Signal." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5516541.

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