Thematische Bibliographien / Attractor analysis

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Auswahl der wissenschaftlichen Literatur zum Thema „Attractor analysis“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 5. Februar 2022

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Zeitschriftenartikel zum Thema "Attractor analysis"

Li, Fuzhi, Jie Xin, Hongyong Cui und Peter E. Kloeden. „Local equi-attraction of pullback attractor sections“. Journal of Mathematical Analysis and Applications 494, Nr. 2 (Februar 2021): 124657. http://dx.doi.org/10.1016/j.jmaa.2020.124657.

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Yang, Ting. „Dynamical Analysis on a Finance System with Nonconstant Elasticity of Demand“. International Journal of Bifurcation and Chaos 30, Nr. 10 (August 2020): 2050148. http://dx.doi.org/10.1142/s0218127420501485.

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This paper investigates a finance system with nonconstant elasticity of demand. First, under some conditions, the system has invariant algebraic surfaces and the analytic expressions of the surfaces are given. Furthermore, when the two surfaces coincide and become one surface, the dynamics on the surface are analyzed and a globally stable equilibrium is found. Second, by using the normal form theory, the Hopf bifurcation is studied and the approximate expression and stability of the bifurcating periodic orbit are obtained. Third, the chaotic behaviors are investigated and the route to chaos is period-doubling bifurcations. Moreover, it is found that the system has coexisting attractors, including periodic attractor and periodic attractor, chaotic attractor and chaotic attractor. With the change of parameter, the two chaotic attractors coincide and then a symmetrical chaotic attractor arises.

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SATO, TADANOBU, und YOUHEI TANAKA. „MINOR DAMAGE DETECTION USING CHAOTIC EXCITATION AND RECURRENCE ANALYSIS“. Journal of Earthquake and Tsunami 05, Nr. 03 (September 2011): 259–70. http://dx.doi.org/10.1142/s1793431111001054.

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In this paper, we propose a new attractor-based structural damage detection technique using chaotic excitation. Attractor is reconstructed using vibration response data and sensitive to the change of the system dynamics. By comparing the change of attractors from healthy and damaged structures, we detect and localize the damage. We use recurrence analysis to analyze the change of attractor. Numerical example demonstrates the robustness and sensitivity of the proposed method.

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Li, Y. Charles, und Hong Yang. „A Mathematical Model of Demand-Supply Dynamics with Collectability and Saturation Factors“. International Journal of Bifurcation and Chaos 27, Nr. 01 (Januar 2017): 1750016. http://dx.doi.org/10.1142/s021812741750016x.

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We introduce a mathematical model on the dynamics of demand and supply incorporating collectability and saturation factors. Our analysis shows that when the fluctuation of the determinants of demand and supply is strong enough, there is chaos in the demand-supply dynamics. Our numerical simulation shows that such a chaos is not an attractor (i.e. dynamics is not approaching the chaos), instead a periodic attractor (of period-3 under the Poincaré period map) exists near the chaos, and coexists with another periodic attractor (of period-1 under the Poincaré period map) near the market equilibrium. Outside the basins of attraction of the two periodic attractors, the dynamics approaches infinity indicating market irrational exuberance or flash crash. The period-3 attractor represents the product’s market cycle of growth and recession, while period-1 attractor near the market equilibrium represents the regular fluctuation of the product’s market. Thus our model captures more market phenomena besides Marshall’s market equilibrium. When the fluctuation of the determinants of demand and supply is strong enough, a three leaf danger zone exists where the basins of attraction of all attractors intertwine and fractal basin boundaries are formed. Small perturbations in the danger zone can lead to very different attractors. That is, small perturbations in the danger zone can cause the market to experience oscillation near market equilibrium, large growth and recession cycle, and irrational exuberance or flash crash.

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Yang, Yingjuan, Guoyuan Qi, Jianbing Hu und Philippe Faradja. „Finding Method and Analysis of Hidden Chaotic Attractors for Plasma Chaotic System From Physical and Mechanistic Perspectives“. International Journal of Bifurcation and Chaos 30, Nr. 05 (April 2020): 2050072. http://dx.doi.org/10.1142/s0218127420500728.

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A method for finding hidden chaotic attractors in the plasma system is presented. Using the Routh–Hurwitz criterion, the stability distribution associated with two parameters is identified to find the region around the equilibrium points of the stable nodes, stable focus-nodes, saddles and saddle-foci for the purpose of investigating hidden chaos. A physical interpretation is provided of the stability distribution for each type of equilibrium point. The basin of attraction and parameter region of hidden chaos are identified by excluding the self-excited chaotic attractors of all equilibrium points. Homotopy and numerical continuation are also employed to check whether the basin of chaotic attraction intersects with the neighborhood of a saddle equilibrium. Bifurcation analysis, phase portrait analysis, and basins of different dynamical attraction are used as tools to distinguish visually the self-excited chaotic attractor and hidden chaotic attractor. The Casimir power reflects the error power between the dissipative energy and the energy supplied by the whistler field. It explains physically, analytically, and numerically the conditions that generate the different dynamics, such as sinks, periodic orbits, and chaos.

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YU, PEI, WEIGUANG YAO und GUANRON CHEN. „ANALYSIS ON TOPOLOGICAL PROPERTIES OF THE LORENZ AND THE CHEN ATTRACTORS USING GCM“. International Journal of Bifurcation and Chaos 17, Nr. 08 (August 2007): 2791–96. http://dx.doi.org/10.1142/s0218127407018762.

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This letter reports a study on some topological properties of chaos using a generalized competitive mode (GCM). The Lorenz system and the Chen system are used as examples for comparison. It is shown that for typical parameter values used in the two systems, the Lorenz attractor has one pair of GCMs in competition, while the Chen attractor has two pairs of GCMs in competition. This explains why the two attractors are topologically different, and furthermore indicates that the Chen attractor is more complex than the Lorenz attractor from the dynamics point of view.

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The Anh, Cung, und Nguyen Dinh Binh. „Attractors for Nonautonomous Parabolic Equations without Uniqueness“. International Journal of Differential Equations 2010 (2010): 1–17. http://dx.doi.org/10.1155/2010/103510.

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Using the theory of uniform global attractors of multivalued semiprocesses, we prove the existence of a uniform global attractor for a nonautonomous semilinear degenerate parabolic equation in which the conditions imposed on the nonlinearity provide the global existence of a weak solution, but not uniqueness. The Kneser property of solutions is also studied, and as a result we obtain the connectedness of the uniform global attractor.

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REGA, G., und A. SALVATORI. „BIFURCATION STRUCTURE AT 1/3-SUBHARMONIC RESONANCE IN AN ASYMMETRIC NONLINEAR ELASTIC OSCILLATOR“. International Journal of Bifurcation and Chaos 06, Nr. 08 (August 1996): 1529–46. http://dx.doi.org/10.1142/s0218127496000904.

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The attractor-basin bifurcation structure in an asymmetric nonlinear oscillator representative of the planar finite forced dynamics of elastic structural systems with initial curvature is studied at the 1/3-subharmonic resonance regime. Local and global analyses are made by means of different computational tools to obtain frequency-response curves of coexisting regular solutions, bifurcation diagrams ensuing from different sets of initial conditions, manifolds structure of direct and inverse saddles corresponding to unstable periodic solutions, basins of attraction at different values of the control parameter. Deep insight into the global dynamics of the system and its evolution is achieved through the analysis of synthetic attractor-basin-manifold phase portraits. The topological mechanisms which entail onset and disappearance of various attractors, and the main and secondary evolutions to chaos, are identified. Special attention is devoted to the analysis of sudden bifurcational events characterizing the system global dynamics, associated with the topological behavior of the invariant manifolds of several direct and inverse saddles. Features of basin metamorphosis, attractor-basin accessibility, and window occurrence are examined. The approach followed, consisting in combined bifurcation analysis of the attractor-basin structure and of the manifold structure, is thought to be useful for a variety of dynamical systems.

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Danca, Marius-F., Michal Fĕckan, Nikolay Kuznetsov und Guanrong Chen. „Attractor as a convex combination of a set of attractors“. Communications in Nonlinear Science and Numerical Simulation 96 (Mai 2021): 105721. http://dx.doi.org/10.1016/j.cnsns.2021.105721.

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Vollmer, J., J. Peinke und A. Okniński. „Dweiltime Analysis of Symmetry-Breaking Dynamical Systems“. Zeitschrift für Naturforschung A 50, Nr. 12 (01.12.1995): 1117–22. http://dx.doi.org/10.1515/zna-1995-1209.

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Abstract Dweiltime analysis is known to characterize saddles giving rise to chaotic scattering. In the present paper it is used to characterize the dependence on initial conditions of the attractor approached by a trajectory in dissipative systems described by one-dimensional, noninvertible mappings which show symmetry breaking. There may be symmetry-related attractors in these systems, and which attractor is approached may depend sensitively on the initial conditions. Dwell-time analysis is useful in this context because it allows to visualize in another way the repellers on the basin boundary which cause this sensitive dependence.

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Dissertationen zum Thema "Attractor analysis"

Wang, Z., Y. Sun, Wyk BJ van, G. Qi und Wyk MA van. „A 3-D four-wing attractor and its analysis“. Brazilian Journal of Physics, 2009. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001369.

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Abstract In this paper, several three dimensional (3-D) four-wing smooth quadratic autonomous chaotic systems are analyzed. It is shown that these systems have a number of similar features. A new 3-D continuous autonomous system is proposed based on these features. The new system can generate a four-wing chaotic attractor with less terms in the system equations. Several basic properties of the new system is analyzed by means of Lyapunov exponents, bifurcation diagrams and Poincare maps. Phase diagrams show that the equilibria are related to the existence of multiple wings.

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Lowenberg, Mark H. „Application of bifurcation analysis to multiple attractor flight dynamics“. Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264065.

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Rosay, Sophie. „A statistical mechanics approach to the modelling and analysis of place-cell activity“. Thesis, Paris, Ecole normale supérieure, 2014. http://www.theses.fr/2014ENSU0010/document.

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Les cellules de lieu de l’hippocampe sont des neurones aux propriétés intrigantes, commele fait que leur activité soit corrélée à la position spatiale de l’animal. Il est généralementconsidéré que ces propriétés peuvent être expliquées en grande partie par les comporte-ments collectifs de modèles schématiques de neurones en interaction. La physique statis-tique fournit des outils permettant l’étude analytique et numérique de ces comportementscollectifs.Nous abordons ici le problème de l’utilisation de ces outils dans le cadre du paradigmedu “réseau attracteur”, une hypothèse théorique sur la nature de la mémoire. La questionest de savoir comment ces méthodes et ce cadre théorique peuvent aider à comprendrel’activité des cellules de lieu. Dans un premier temps, nous proposons un modèle de cellulesde lieu dans lequel la localisation spatiale de l’activité neuronale est le résultat d’unedynamique d’attracteur. Plusieurs aspects des propriétés collectives de ce modèle sontétudiés. La simplicité du modèle permet de les comprendre en profondeur. Le diagrammede phase du modèle est calculé et discuté en comparaison avec des travaux précedents.Du point de vue dynamique, l’évolution du système présente des motifs particulièrementriches. La seconde partie de cette thèse est à propos du décodage de l’activité des cellulesde lieu. Nous nous demandons quelle est l’implication de l’hypothèse des attracteurs surce problème. Nous comparons plusieurs méthodes de décodage et leurs résultats sur letraitement de données expérimentales
Place cells in the hippocampus are neurons with interesting properties such as the corre-lation between their activity and the animal’s position in space. It is believed that theseproperties can be for the most part understood by collective behaviours of models of inter-acting simplified neurons. Statistical mechanics provides tools permitting to study thesecollective behaviours, both analytically and numerically.Here, we address how these tools can be used to understand place-cell activity withinthe attractor neural network paradigm, a theory for memory. We first propose a modelfor place cells in which the formation of a localized bump of activity is accounted for byattractor dynamics. Several aspects of the collective properties of this model are studied.Thanks to the simplicity of the model, they can be understood in great detail. The phasediagram of the model is computed and discussed in relation with previous works on at-tractor neural networks. The dynamical evolution of the system displays particularly richpatterns. The second part of this thesis deals with decoding place-cell activity, and theimplications of the attractor hypothesis on this problem. We compare several decodingmethods and their results on the processing of experimental recordings of place cells in afreely behaving rat

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Villani, Gianluca. „Analysis of an Attractor Neural Network Model for Working Memory: A Control Theory Approach“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260079.

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Working Memory (WM) is a general-purpose cognitive system responsible for temporaryholding information in service of higher order cognition systems, e.g. decision making. Inthis thesis we focus on a non-spiking model belonging to a special family of biologicallyinspired recurrent Artificial Neural Network aiming to account for human experimentaldata on free recall. Considering its modular structure, this thesis gives a networked systemrepresentation of WM in order to analyze its stability and synchronization properties.Furthermore, with the tools provided by bifurcation analysis we investigate the role of thedifferent parameters on the generated synchronized patterns. To the best of our knowledge,the proposed dynamical recurrent neural network has not been studied before froma control theory perspective.
Arbetsminne är ett brett, övergripande kognitivt system som ansvarar för temporär informationslagringhos högre ordningens tänkande, såsom beslutsfattning. Denna masteravhandlingämnar sig åt att studera icke-spikande modeller tillhörande en speciell gren avbiologiskt inspirerade återkommande neuronnät, för att redogöra mänsklig experimentelldata för fenomenet free recall. Med avseende på dess modulära struktur, framför denna avhandlingen nätverkssystemsrepresentation av arbetsminne sådant att dess stabilitets- samtsynkroniseringsegenskaper kan granskas. Innebörden av olika systemparametrar av de genereradesynkroniseringsmönstren undersöktes genom användandet av bifurkationsanalys.Som vi förstår, har den föreslagna dynamiska återkommande neuronätet inte studerats frånett reglertekniskt perspektiv tidigare.

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Doboli, Simona. „Latent Attractors: A Mechanism for Context-Dependent Information Processing in Biological and Artificial Neural Systems“. Cincinnati, Ohio : University of Cincinnati, 2001. http://www.ohiolink.edu/etd/view.cgi?ucin984613871.

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Israel, Haydi. „Comportement asymptotique de modèles en séparation de phases“. Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2308/document.

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Dans cette thèse, on étudie l'existence, l'unicité et la régularité des solutionsd'équation de type Cahn-Hilliard ainsi que son comportement asymptotiqueen termes d'existence de l'attracteur global et d'un attracteur exponentiel. Cetteéquation est considérée dans un domaine borné et régulier pour différents types denonlinéarités et de conditions au bord.D'abord, on étudie l'équation avec des conditions de type Dirichlet sur le bord etune nonlinéarité régulière. Après, on considère une perturbation du problème et ondémontre l'existence d'une famille robuste d'attracteurs exponentiels lorsque ε tendvers 0.Ensuite, on étudie l'équation avec des conditions dynamiques sur le bord. On considèretout d'abord une nonlinéarité régulière et on donne une étude théorique etnumérique. Après, on illustre ces résultats par des simulations numériques en dimensiondeux d'espace qui permettent d'étudier l'influence des différents paramètres.On termine par une étude du modèle considéré avec une nonlinéarité singulière quel'on approche par des fonctions régulières et on introduit une notion de solutionappropriée
This thesis is devoted to the study of the existence, uniqueness andregularity of solutions for a Cahn-Hilliard type equation, as well as the asymptoticbehavior in terms of existence of the global attractor and of an exponential attractor.This equation is considered in a bounded and smooth domain under variousassumptions on the nonlinear terms and with different boundary conditions.We start by studying the equation with Dirichlet boundary conditions and a regularnonlinearity. Then, we consider a perturbation of the problem and we prove theexistence of a robust family of exponential attractors as ε tends to 0.For the equation endowed with dynamic boundary conditions, we first consider aregular nonlinearity and we treat the theoretical and numerical analysis. Then, weillustrate the results by numerical simulations in two space dimension which allow usto study the influence of different parameters. Finally, we treat the problem consideredwith a singular nonlinearity which is approximated by regular functions andwe give a suitable notion of solutions

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Křápková, Monika. „Dynamický model produkce polyhydroxyalkonoátů termofilní bakterií S. thermodepolymerans“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442582.

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Tato diplomová práce se zabývá rekonstrukcí dynamického modelu produkce polyhydroxyalkanoátů (PHA) termofilní bakterií Schlegelella thermodepolymerans. První kapitola poskytuje čtenářům krátký úvod do systémové biologie a matematické teorie grafů. Na ni navazuje druhá kapitola zabývající se různými přístupy v dynamickém modelování, včetně běžně používaných nástrojů pro dynamickou analýzu komplexních systémů. Třetí kapitola pak sleduje další pojmy a možnosti týkající se analýzy modelu. Následující kapitola se zaměřuje na metabolomiku a často používané laboratorní techniky a pátá kapitola je pak věnována polyhydroxyalkanoátům, zejména jejich chemické struktuře a vlastnostem. V kapitole šesté je navržen obecný booleovský model pro produkci PHA termofilními bakteriemi. Kapitola sedmá se poté zaměřuje na zdokonalení modelu se zaměřením na S. thermodepolymerans. Výsledný dynamický model je podroben analýze a výsledky jsou diskutovány.

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Erkursun, Nazife. „Convergence Of Lotz-raebiger Nets On Banach Spaces“. Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12612108/index.pdf.

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The concept of LR-nets was introduced and investigated firstly by H.P. Lotz in [27] and by F. Raebiger in [30]. Therefore we call such nets Lotz-Raebiger nets, shortly LR-nets. In this thesis we treat two problems on asymptotic behavior of these operator nets. First problem is to generalize well known theorems for Ces`aro averages of a single operator to LR-nets, namely to generalize the Eberlein and Sine theorems. The second problem is related to the strong convergence of Markov LR-nets on L1-spaces. We prove that the existence of a lower-bound functions is necessary and sufficient for asymptotic stability of LR-nets of Markov operators.

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Hesseborn, Alexander, und Mårten Vuorinen. „Correctness Attraction Analysis in C“. Thesis, KTH, Skolan för teknikvetenskap (SCI), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233209.

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Is the execution of computer programs really deterministic? Will a perturbation cause the program to break or give an incorrect output?In this project, the goal is to add perturbations to programs in C, and see if we can get the same result as the program executed without said perturbations.The algorithm takes source code and transforms it into XML. The code is transformed in order to identify nodes to perturb. When the nodes are identified we add a perturbation to some node and transform the XML code back to source code. When we have the perturbed code we execute the code and compare it to the code executed without any perturbations.We have, using cPerturb, tested several nodes in five diﬀer- ent programs and identified a subset of these which yields the same result as the unperturbed programs.
Måste en körning av ett program gå till på samma sätt för att få samma resultat? En introducerad störning kommer påverka hur koden körs, men behöver det påverka resultatet? Vårt mål med det här projektet var att skapa mjukvara i C som medvetet stör program, och jämföra det med ett program som körts utan störningar. Algoritmen vi tagit fram transformerar källkoden till XML. Därefter identifierar den noder som går att störa, lägger till en störning och transformerar XML-koden tillbaka till käll-kod. Därefter körs den störda koden och jämförs med koden som körts utan störning. Vi har, med hjälp av cPerturb, testat ett flertal noder över fem olika program och därmed identifierat noder som ger samma resultat som den ickestörda koden.

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Eckstein, Bernd. „Bandcounter: Counting bands of multiband chaotic attractors“. Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-28244.

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Bücher zum Thema "Attractor analysis"

T, Ivancevic Tijana, Hrsg. High-dimensional chaotic and attractor systems: A comprehensive introduction. Dordrecht: Springer, 2007.

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Puu, Tönu. Attractors, Bifurcations, and Chaos: Nonlinear Phenomena in Economics. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000.

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Pumariño, Antonio. Coexistence and persistence of strange attractors. Berlin: Springer, 1997.

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Jerzy, Wojewoda, Hrsg. Attractors of quasiperi[o]dically forced systems. Singapore: World Scientific, 1993.

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Chesi, Graziano. Domain of attraction: Analysis and control via SOS programming. London: Springer, 2011.

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Skiadas, Christos H. Chaotic modelling and simulation: analysis of chaotic models, attractors and forms. Boca Raton: Chapman & Hall/CRC, 2009.

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Warsaw, Poland) EUROATTRACTOR (1st 2000. Attractors, signals, and synergetics: Proceedings of the 1st European Interdisciplinary School on Nonlinear Dynamics for System and Signal Analysis, EUROATTRACTOR 2000, Warsaw, June 06 to June 15, 2000. Lengerich: Pabst Science Publishers, 2002.

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Ruelle, David. Chaotic evolution and strange attractors: The statistical analysis of time series for deterministic nonlinear systems. Cambridge: Cambridge University Press, 1989.

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Ruelle, D. Chaotic evolution and strange attractors: The statistical analysis of time series for deterministic nonlinear systems. Cambridge: Cambridge univ. press, 1989.

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Norman, Judith. An analysis of public transportation to attract non-traditional transit riders in California. [Sacramento]: Business, Transportation and Housing Agency, California Dept. of Transportation, 2003.

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Buchteile zum Thema "Attractor analysis"

Augustová, Petra, und Zdeněk Beran. „Characteristics of the Chen Attractor“. In Nostradamus 2013: Prediction, Modeling and Analysis of Complex Systems, 305–12. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00542-3_31.

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Abbas, Mujahid, und Talat Nazir. „Attractor of the Generalized Contractive Iterated Function System“. In Mathematical Analysis and Applications, 401–28. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2018. http://dx.doi.org/10.1002/9781119414421.ch11.

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Atmanspacher, H., H. Scheingraber und W. Voges. „Attractor Reconstruction and Dimensional Analysis of Chaotic Signals“. In Data Analysis in Astronomy III, 3–19. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-5646-2_1.

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Beneš, Nikola, Luboš Brim, Jakub Kadlecaj, Samuel Pastva und David Šafránek. „AEON: Attractor Bifurcation Analysis of Parametrised Boolean Networks“. In Computer Aided Verification, 569–81. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53288-8_28.

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Bartlett, Marian Stewart. „Learning Viewpoint Invariant Representations of Faces in an Attractor Network“. In Face Image Analysis by Unsupervised Learning, 129–49. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1637-8_7.

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Khennaoui, Amina Aicha, Adel Ouannas, Giuseppe Grassi und Ahmad Taher Azar. „Dynamic Analysis of a Fractional Map with Hidden Attractor“. In Advances in Intelligent Systems and Computing, 731–39. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44289-7_68.

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Mimoso, José P., und Ana Nunes. „A Qualitative Analysis of the Attractor Mechanism of General Relativity“. In The Cosmology of Extra Dimensions and Varying Fundamental Constants, 223–28. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-3272-7_30.

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Asai, Yoshiyuki, Takashi Yokoi und Alessandro E. P. Villa. „Detection of a Dynamical System Attractor from Spike Train Analysis“. In Artificial Neural Networks – ICANN 2006, 623–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11840817_65.

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Sun, Xuelong, Michael Mangan und Shigang Yue. „An Analysis of a Ring Attractor Model for Cue Integration“. In Biomimetic and Biohybrid Systems, 459–70. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95972-6_49.

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Reid, Alastair G. „A Critical Analysis of an Attractor Network Model of Schizophrenia“. In Computational Neuroscience, 463–70. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9800-5_74.

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Konferenzberichte zum Thema "Attractor analysis"

Liu Daizhi, Li Xihai, Zhao Ke und Liu Zhigang. „Attractor analysis of feature phase space“. In Proceedings of 2003 International Conference on Neural Networks and Signal Processing. IEEE, 2003. http://dx.doi.org/10.1109/icnnsp.2003.1279392.

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Benes, Nikola, Lubos Brim, Samuel Pastva, David Safranek, Matej Trojak, Jan Cerveny und Jakub Salagovic. „Fully Automated Attractor Analysis of Cyanobacteria Models“. In 2018 22nd International Conference on System Theory, Control and Computing (ICSTCC). IEEE, 2018. http://dx.doi.org/10.1109/icstcc.2018.8540762.

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Thanaj, Marjola, Andrew J. Chipperfield und Geraldine F. Clough. „Attractor Reconstruction Analysis for Blood Flow Signals“. In 2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, 2019. http://dx.doi.org/10.1109/embc.2019.8856856.

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Charlton, P. H., L. Camporota, J. Smith, M. Nandi, M. Christie, P. J. Aston und R. Beale. „Measurement of cardiovascular state using attractor reconstruction analysis“. In 2015 23rd European Signal Processing Conference (EUSIPCO). IEEE, 2015. http://dx.doi.org/10.1109/eusipco.2015.7362422.

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Kuznetsov, N. V., G. A. Leonov, T. N. Mokaev und S. M. Seledzhi. „Hidden attractor in the Rabinovich system, Chua circuits and PLL“. In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015). Author(s), 2016. http://dx.doi.org/10.1063/1.4951991.

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Lyle, Jane, Peter Charlton, Esther Bonet-Luz, Gary Chaffey, Mark Christie, Manasi Nandi und Philip Aston. „Beyond HRV: Analysis of ECG Signals using Attractor Reconstruction“. In 2017 Computing in Cardiology Conference. Computing in Cardiology, 2017. http://dx.doi.org/10.22489/cinc.2017.091-096.

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Beltrán, Luis Alberto, Valeri Kontorovich und Zinaida Lovtchikova. „Cumulant Analysis of Rössler Attractor: Analytical Study“. In 2008 Electronics, Robotics and Automotive Mechanics Conference (CERMA). IEEE, 2008. http://dx.doi.org/10.1109/cerma.2008.34.

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Seaver, Mark E., Jonathan M. Nichols, Stephen T. Trickey und Michael D. Todd. „Weld line degradation assessment using chaotic attractor property analysis“. In NDE for Health Monitoring and Diagnostics, herausgegeben von Tribikram Kundu. SPIE, 2003. http://dx.doi.org/10.1117/12.483982.

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Xu, Yuhua, Wuneng Zhou, Chengrong Xie und Weixun Gao. „On Dynamic Analysis of a New Single Parameter Chaotic Attractor“. In 2008 Pacific-Asia Workshop on Computational Intelligence and Industrial Application (PACIIA). IEEE, 2008. http://dx.doi.org/10.1109/paciia.2008.353.

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Yao, Qiguo, Yuxiang Su und Lili Li. „Analysis of Dynamic Characteristics of a New Lorenz-like Attractor“. In 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/macmc-17.2018.97.

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Berichte der Organisationen zum Thema "Attractor analysis"

Piech, M. A. Fractal Terrain Analysis from an Attractor Viewpoint. Fort Belvoir, VA: Defense Technical Information Center, Februar 1990. http://dx.doi.org/10.21236/ada219620.

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Quest, A. Out of the Way and Out of Place: An Interpretative Phenomenological Analysis of the Experiences of Social Interactions of Bisexually Attracted Young People. Portland State University Library, Januar 2000. http://dx.doi.org/10.15760/etd.2001.

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Arnold, Zachary, Ilya Rahkovsky und Tina Huang. Tracking AI Investment: Initial Findings From the Private Markets. Center for Security and Emerging Technology, September 2020. http://dx.doi.org/10.51593/20190011.

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The global AI industry is booming, with privately held firms pulling in nearly $40 billion in disclosed investment in 2019 alone. U.S. companies continue to attract the majority of that funding—64 percent of it in 2019—but that lead is not guaranteed. This report analyzes AI investment data from 2015 to 2019 to help better understand trends in the global AI landscape.

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Torres-Mancera, Rocio, Carlos de las Heras-Pedrosa, Carmen Jambrino-Maldonado und Patricia P. Iglesias-Sanchez. Public Relations and the Fundraising professional in the Cultural Heritage Industry: a study of Spain and Mexico / Las relaciones públicas y el profesional de la captación de fondos en la industria del patrimonio cultural: un estudio de España y México. Revista Internacional de Relaciones Públicas, Juni 2021. http://dx.doi.org/10.5783/rirp-21-2021-03-27-48.

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The present research aims to understand the current situation of strategic communication and public relations applied in the professional field of fundraising in the cultural heritage environment. It observes the current patterns used in the sector to obtain and generate long-term sustainable funding, through the stimulation of investors and International Cooperation projects from the European Union in line with UNESCO. Two international case studies are compared: Spain and Mexico, through the selection of territorial samples in Malaga and San Luis Potosi. The methodology used is based on a combination of in-depth interviews with key informants and content analysis. In the first instance, the degree of application of communication and public relations tools for strategic purposes to directly attract economic resources to the management of cultural heritage (tangible and intangible) in the region is studied. In line with the results obtained, the current parameters and key indicators of the profile of the fundraising professional in public and private cultural management are presented.

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Idakwo, Gabriel, Sundar Thangapandian, Joseph Luttrell, Zhaoxian Zhou, Chaoyang Zhang und Ping Gong. Deep learning-based structure-activity relationship modeling for multi-category toxicity classification : a case study of 10K Tox21 chemicals with high-throughput cell-based androgen receptor bioassay data. Engineer Research and Development Center (U.S.), Juli 2021. http://dx.doi.org/10.21079/11681/41302.

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Deep learning (DL) has attracted the attention of computational toxicologists as it offers a potentially greater power for in silico predictive toxicology than existing shallow learning algorithms. However, contradicting reports have been documented. To further explore the advantages of DL over shallow learning, we conducted this case study using two cell-based androgen receptor (AR) activity datasets with 10K chemicals generated from the Tox21 program. A nested double-loop cross-validation approach was adopted along with a stratified sampling strategy for partitioning chemicals of multiple AR activity classes (i.e., agonist, antagonist, inactive, and inconclusive) at the same distribution rates amongst the training, validation and test subsets. Deep neural networks (DNN) and random forest (RF), representing deep and shallow learning algorithms, respectively, were chosen to carry out structure-activity relationship-based chemical toxicity prediction. Results suggest that DNN significantly outperformed RF (p < 0.001, ANOVA) by 22–27% for four metrics (precision, recall, F-measure, and AUPRC) and by 11% for another (AUROC). Further in-depth analyses of chemical scaffolding shed insights on structural alerts for AR agonists/antagonists and inactive/inconclusive compounds, which may aid in future drug discovery and improvement of toxicity prediction modeling.

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Thomas, Catherine, und Lynne Koontz. 2020 national park visitor spending effects: Economic contributions to local communities, states, and the nation. National Park Service, Mai 2021. http://dx.doi.org/10.36967/nrr-2286547.

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The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports economic activity within park gateway communities. This report summarizes the annual economic contribution analysis that measures how NPS visitor spending cycles through local economies, generating business sales and supporting jobs and income. In 2020, the National Park System received over 237 million recreation visits (down 28% from 2019). Visitors to national parks spent an estimated $14.5 billion in local gateway regions (down 31% from 2019). The estimated contribution of this spending to the national economy was 234,000 jobs, $9.7 billion in labor income, $16.7 billion in value added, and $28.6 billion in economic output. The lodging sector saw the highest direct effects, with $5 billion in economic output directly contributed to this sector nationally. The restaurants sector saw the next greatest effects, with $3 billion in economic output directly contributed to this sector nationally. Results from the Visitor Spending Effects report series are available online via an interactive tool. Users can view year-by-year trend data and explore current year visitor spending, jobs, labor income, value added, and economic output effects by sector for national, state, and local economies. The interactive tool is available at https://www.nps.gov/subjects/socialscience/vse.htm.

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Rukundo, Solomon. Tax Amnesties in Africa: An Analysis of the Voluntary Disclosure Programme in Uganda. Institute of Development Studies (IDS), Dezember 2020. http://dx.doi.org/10.19088/ictd.2020.005.

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Tax amnesties have taken centre stage as a compliance tool in recent years. The OECD estimates that since 2009 tax amnesties in 40 jurisdictions have resulted in the collection of an additional €102 billion in tax revenue. A number of African countries have introduced tax amnesties in the last decade, including Nigeria, Namibia, South Africa and Tanzania. Despite their global popularity, the efficacy of tax amnesties as a tax compliance tool remains in doubt. The revenue is often below expectations, and it probably could have been raised through effective use of regular enforcement measures. It is also argued that tax amnesties might incentivise non-compliance – taxpayers may engage in non-compliance in the hope of benefiting from an amnesty. This paper examines the administration of tax amnesties in various jurisdictions around the world, including the United States, Australia, Canada, Kenya and South Africa. The paper makes a cost-benefit analysis of these and other tax amnesties – and from this analysis develops a model tax amnesty, whose features maximise the benefits of a tax amnesty while minimising the potential costs. The model tax amnesty: (1) is permanent, (2) is available only to taxpayers who make a voluntary disclosure, (3) relieves taxpayers of penalties, interest and the risk of prosecution, but treats intentional and unintentional non-compliance differently, (4) has clear reporting requirements for taxpayers, and (5) is communicated clearly to attract non-compliant taxpayers without appearing unfair to the compliant ones. The paper then focuses on the Ugandan tax amnesty introduced in July 2019 – a Voluntary Disclosure Programme (VDP). As at 7 November 2020, this initiative had raised USh16.8 billion (US$6.2 million) against a projection of USh45 billion (US$16.6 million). The paper examines the legal regime and administration of this VDP, scoring it against the model tax amnesty. It notes that, while the Ugandan VDP partially matches up to the model tax amnesty, because it is permanent, restricted to taxpayers who make voluntary disclosure and relieves penalties and interest only, it still falls short due to a number of limitations. These include: (1) communication of the administration of the VDP through a public notice, instead of a practice note that is binding on the tax authority; (2) uncertainty regarding situations where a VDP application is made while the tax authority has been doing a secret investigation into the taxpayer’s affairs; (3) the absence of differentiated treatment between taxpayers involved in intentional non-compliance, and those whose non-compliance may be unintentional; (4) lack of clarity on how the VDP protects the taxpayer when non-compliance involves the breach of other non-tax statutes, such as those governing financial regulation; (5)absence of clear timelines in the administration of the VDP, which creates uncertainty;(6)failure to cater for voluntary disclosures with minor errors; (7) lack of clarity on VDP applications that result in a refund position for the applicant; and (8) lack of clarity on how often a VDP application can be made. The paper offers recommendations on how the Ugandan VDP can be aligned to match the model tax amnesty, in order to gain the most from this compliance tool.

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Atuhurra, Julius, und Michelle Kaffenberger. System (In)Coherence: Quantifying the Alignment of Primary Education Curriculum Standards, Examinations, and Instruction in Two East African Countries. Research on Improving Systems of Education (RISE), Dezember 2020. http://dx.doi.org/10.35489/bsg-rise-wp_2020/057.

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Improvements in instructional coherence have been shown to have large impacts on student learning, yet analysis of such coherence, especially in developing countries and at a systems level, is rare. We use an established methodology, the Surveys of Enacted Curriculum (SEC), and apply it to a developing country context to systematically analyze and quantify the content and coherence of the primary curriculum standards, national examinations, and actual teaching delivered in the classroom in Uganda and Tanzania. We find high levels of incoherence across all three instructional components. In Uganda, for example, only four of the fourteen topics in the English curriculum standards appear on the primary leaving exam, and two of the highest-priority topics in the standards are completely omitted from the exams. In Tanzania, only three of fourteen English topics are covered on the exam, and all are assessed at the “memorization” level. Rather than aligning with either the curriculum standards or exams, teachers’ classroom instruction is poorly aligned with both. Teachers tend to cover broad swathes of content and levels of cognitive demand, unrelated to the structure of either the curriculum standards or exams. An exception is Uganda mathematics, for which standards, exams, and teacher instruction are all well aligned. By shedding light on alignment deficits in the two countries, these results draw attention to a policy area that has previously attracted little (if any) attention in many developing countries’ education policy reform efforts. In addition to providing empirical results for Uganda and Tanzania, this study provides a proof-of-concept for the use of the SEC methodology as a diagnostic tool in developing countries, helping education systems identify areas of instructional (in)coherence and informing efforts to improve coherence for learning.

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