Optimal contact process on complex networks (2009)
Yang, Rui, Zhou, Tao, Xie, Yan-Bo, Lai, Ying-Cheng, Wang, Bing-Hong
Contact processes on complex networks are a recent subject of study in nonequilibrium statistical physics and they are also important to applied fields such as epidemiology and computer and...
Optimal contact process on complex networks (2009)
Yang, Rui, Zhou, Tao, Xie, Yan-Bo, Lai, Ying-Cheng, Wang, Bing-Hong
Contact processes on complex networks are a recent subject of study in nonequilibrium statistical physics and they are also important to applied fields such as epidemiology and computer and...
Research QoS Model of a Router with Feedback Control (2008)
Zhibin Yang, Nong Ye, Ying-cheng Lai
The Internet has evolved into a shared, integrated platform of a broad range of applications with different Quality-of-Service (QoS) requirements. Routers are an important part of the Internet and...
CHARACTERIZATION OF NEURAL INTERACTION DURING LEARNING AND ADAPTATION FROM SPIKE-TRAIN DATA (2008)
Liqiang Zhu, Ying-cheng Lai, Jiping He
(Communicated by Jianhong Wu) Abstract. A basic task in understanding the neural mechanism of learning and adaptation is to detect and characterize neural interactions and their changes in response...
Nong Ye, Esma S. Gel, Xueping Li, Toni Farley, Ying-cheng Lai
production planning
Raimond L. Winslow, Dongming Cai, Anthony Vargheses, Ying-cheng Lai
Abstract-Effects of cell-to-cell coupling conductance on dynamics of sinus node cells are examined. Cell models are biophysically detailed, and are based on the kinetic equations developed by Noble...
Vinayak Kamath, Ying-cheng Lai, Liqiang Zhu
Abstract- The spread-spectrum structure of GPS signals provides inherent jamming tolerance for GPS receivers. In a hostile environment where jamming sites may be close to GPS users, a larger JSR is...
Inducing Chaos in Electronic Circuits by Resonant Perturbations (2008)
Anil K, Satish Krishnamoorthy, Ying-cheng Lai, John A. Gaudet
Abstract—We propose a scheme to induce chaotic attractors in electronic circuits. The applications that we are interested in stipulate the following three constraints: 1) the circuit operates in a...
ORIGINAL ARTICLE Efficiency of carrier-phase integer ambiguity resolution for precise (2008)
Liqiang Zhu, Ying-cheng Lai, Mayur Shah, Sultan Mahmood, L. Zhu, ...
GPS positioning in noisy environments
Nong Ye, Zhibin Yang, Ying-cheng Lai, Toni Farley
through job scheduling with weighted shortest processing time-adjusted
Attacks and Cascades in Complex Networks (2008)
Ying-cheng Lai, Adilson E. Motter, Takashi Nishikawa
Abstract. This paper reviews two problems in the security of complex networks: cascades of overload failures on nodes and range-based attacks on links. Cascading failures have been reported for...
Mayur Shah, Arizona State, Ying-cheng Lai, Ph. D. Physics
signals in noisy environment
LETTER Communicated by Krishna Shenoy Probing Changes in Neural Interaction During Adaptation (2008)
Liqiang Zhu, Ying-cheng Lai, Jiping He
A procedure is developed to probe the changes in the functional interactions among neurons in primary motor cortex of the monkey brain during adaptation. A monkey is trained to learn a new skill,...
Epileptic Seizures: Quakes of the brain? (2007)
Osorio, Ivan, Frei, Mark G., Sornette, Didier, Milton, John, Lai, Ying-Cheng
The concept of universality proposes that dynamical systems with the same power law behaviors are equivalent at large scales. We test this hypothesis on the Earth's crust and the epileptic brain, and...
() World Scientific Publishing Company FEEDBACK SYNCHRONIZATION USING POLE-PLACEMENT CONTROL (2007)
Roberto Tonelli, Ying-cheng Lai
Synchronization in chaotic systems has become an active area of research since the pioneering work of Pecora and Carroll. Most existing works, however, rely on a passive approach: A coupling between...
Saeed Taherion, Ying-cheng Lai
Chaotic lag synchronization is a subtle dynamical phenomenon in which the states of two mutually coupled, nonidentical chaotic oscillators follow each other with a fixed time delay. We investigate to...
Superlong chaotic transients have been discovered in numerical simulations of model spatiotemporal chaotic dynamical systems. The presence of such transients poses a fundamental difficulty for...
Physica D 150 (2001) 1--13 (2007)
Previous investigations of riddling have focused in the case where the dynamical invariant set in the symmetric invariant subspace of the system is a chaotic attractor. A situation expected to arise...
Observations on the Application of the Correlation Dimension (2007)
And Correlation Integral, Ivan Osorio, Ying-cheng Lai, Mark G. Frei
in its predictive application. Specifically, chaos holds great allure to epileptologists, because the aperiodic and unstable behavior of the epileptic human brain seems ideally suited to...
Enhancing synchronization in complex networks of coupled phase oscillators (2007)
Wang, Xingang, Guan, Shuguang, Lai, Ying-Cheng, Lai, Choy Heng
By a model of coupled phase oscillators, we show analytically how synchronization in {\em non-identical} complex networks can be enhanced by introducing a proper gradient into the couplings. It is...
The multiple effects of gradient coupling on network synchronization (2007)
Wang, Xingang, Lai, Ying-Cheng, Zhou, Cangtao, Lai, Choy Heng
Recent studies have shown that synchronizability of complex networks can be significantly improved by asymmetric couplings, and increase of coupling gradient is always in favor of network...
Optimization of synchronization in gradient clustered networks (2006)
Wang, Xingang, Huang, Liang, Lai, Ying-Cheng, Lai, Choy Heng
We consider complex clustered networks with a gradient structure, where sizes of the clusters are distributed unevenly. Such networks describe more closely actual networks in biophysical systems and...
Synchronization in Gradient Networks (2006)
Wang, Xingang, Lai, Ying-Cheng, Lai, Choy Heng
The contradiction between the fact that many empirical networks possess power-law degree distribution and the finding that network of heterogeneous degree distribution is difficult to synchronize has...
Oscillations of complex networks (2006)
Wang, Xingang, Lai, Ying-Cheng, Lai, Chong Heng
A complex network processing information or physical flows is usually characterized by a number of macroscopic quantities such as the diameter and the betweenness centrality. An issue of significant...
Reactive dynamics of inertial particles in nonhyperbolic chaotic flows (2003)
Motter, Adilson E., Lai, Ying-Cheng, Grebogi, Celso
Anomalous kinetics of infective (e.g., autocatalytic) reactions in open, nonhyperbolic chaotic flows are important for many applications in biological, chemical, and environmental sciences. We...
Amplitude modulation in a pair of time-delay coupled external-cavity semiconductor lasers (2003)
Prasad, Awadhesh, Lai, Ying-Cheng, Gavrielides, Athanasios, Kovanis, Vassilios
Copyright 2003 Elsevier Science B.V. The Physics Letters A journal homepage may be accessed at: http://www.sciencedirect.com/science/journal/03759601
Complicated basins in external-cavity semiconductor lasers (2003)
Prasad, Awadhesh, Lai, Ying-Cheng, Gavrielides, Athanasios, Kovanis, Vassilios
Copyright 2003 Elsevier Science B.V. The Physics Letters A journal homepage may be accessed at: http://www.sciencedirect.com/science/journal/03759601
Signatures of small-world and scale-free properties in large computer programs (2003)
Lai, Ying-Cheng, Motter, Adilson E.
A large computer program is typically divided into many hundreds or even thousands of smaller units, whose logical connections define a network in a natural way. This network reflects the internal...
Heterogeneity in oscillator networks: Are smaller worlds easier to synchronize? (2003)
Nishikawa, Takashi, Motter, Adilson E., Lai, Ying-Cheng, Hoppensteadt, Frank C.
Small-world and scale-free networks are known to be more easily synchronized than regular lattices, which is usually attributed to the smaller network distance between oscillators. Surprisingly, we...
Strange nonchaotic attractors in noise driven systems (2003)
Wang, Xingang, Zhan, Meng, Lai, Ying-Cheng
Strange nonchaotic attractors (SNAs) in noise driven systems are investigated. Before the transition to chaos, due to the effect of noise, a typical trajectory will wander between the periodic...
Universal scaling of Lyapunov exponents in coupled chaotic oscillators (2003)
Liu, Zonghua, Lai, Ying-Cheng, Matías, Manuel A.
4 pages, 4 figures.-- PACS nrs.: 05.45.Xt, 05.40.-a.-- Rapid communication.
Large-scale structural organization of social networks (2003)
Motter, Adilson E., Nishikawa, Takashi, Lai, Ying-Cheng
The characterization of large-scale structural organization of social networks is an important interdisciplinary problem. We show, by using scaling analysis and numerical computation, that the...
Cascade-based attacks on complex networks (2003)
Motter, Adilson E., Lai, Ying-Cheng
We live in a modern world supported by large, complex networks. Examples range from financial markets to communication and transportation systems. In many realistic situations the flow of physical...
Dependable Information Infrastructures as Complex Adaptive Systems (2003)
Nong Ye, Ying-cheng Lai, Toni Farley
Information infrastructures, such as the Internet and Computational Grids, have enabled a networked computing and communication environment. Although many organizations depend on network-centric...
Smallest small-world network (2002)
Nishikawa, Takashi, Motter, Adilson E., Lai, Ying-Cheng, Hoppensteadt, Frank C.
Efficiency in passage times is an important issue in designing networks, such as transportation or computer networks. The small-world networks have structures that yield high efficiency, while...
Topology of the conceptual network of language (2002)
Motter, Adilson E., Lai, Ying-Cheng, Dasgupta, Partha
We define two words in a language to be connected if they express similar concepts. The network of connections among the many thousands of words that make up a language is important not only for the...
Cusp-scaling behavior in fractal dimension of chaotic scattering (2002)
Motter, Adilson E., Lai, Ying-Cheng
A topological bifurcation in chaotic scattering is characterized by a sudden change in the topology of the infinite set of unstable periodic orbits embedded in the underlying chaotic invariant set....
Motter, Adilson E., Nishikawa, Takashi, Lai, Ying-Cheng
The small-world phenomenon in complex networks has been identified as being due to the presence of long-range links, i.e., links connecting nodes that would otherwise be separated by a long...
c ○ World Scientific Publishing Company RECENT DEVELOPMENTS IN CHAOTIC TIME SERIES ANALYSIS (2002)
In this paper, two issues are addressed: (1) the applicability of the delay-coordinate embedding method to transient chaotic time series analysis, and (2) the Hilbert transform methodology for...
Prasad, Awadhesh, Lai, Ying-Cheng, Gavrielides, Athanasios, Kovanis, Vassilios
This article may be accessed (additional fees may apply) at: http://www.iop.org/EJ/abstract/1464-4266/3/4/308/
Regular dynamics of low-frequency fluctuations in external cavity semiconductor lasers (2001)
Davidchack, Ruslan, Lai, Ying-Cheng, Gavrielides, Athanasios, Kovanis, Vassilios
Copyright 2001 The American Physical Society. This article may also be accessed from the publisher's site located at http://prola.aps.org/abstract/PRE/v63/i5/e056206
Towards Complete Detection Of Unstable Periodic Orbits In Chaotic Systems (2001)
Ruslan L. Davidchack, Ying-Cheng Lai, Aaron Klebanoff, Erik M. Bollt
We present a rigorous analysis and numerical evidence indicating that a recently developed methodology for detecting unstable periodic orbits is capable of yielding all orbits up to periods limited...
How often are chaotic transients in spatially extended ecological systems? (2001)
Mukeshwar Dhamala, Ying-Cheng Lai, Robert D. Holt
A traditional assumption in quantitative ecology is that the asymptotic state of the model determines what can be observed in the evolution of the system. It is suggested, however, that irregular...
on Dynamical Mechanism for Coexistence of Dispersing Species (2001)
Doi Jtbi Available, Mary Ann Harrison, Ying-cheng Lai, D. Holta
this paper, we attempt to articulate this conjecture in more detail, and in particular to examine the dynamical mechanism responsible for the coexistence of competing dispersing clones. Our analysis...
Davidchack, Ruslan, Lai, Ying-Cheng, Gavrielides, Athanasios, Kovanis, Vassilios
Copyright 2000 Elsevier Science B.V. The Physica D journal homepage is located at: http://www.sciencedirect.com/science/journal/01672789
Validity of threshold-crossing analysis of symbolic dynamics from chaotic time series (2000)
Bollt, Erik M., Stanford, Theodore, Lai, Ying-Cheng, Zyczkowski, Karol
A practical and popular technique to extract the symbolic dynamics from experimentally measured chaotic time series is the threshold-crossing method, by which an arbitrary partition is utilized for...
Dynamical origin of low frequency fluctuations in external cavity semiconductor lasers (2000)
Davidchack, Ruslan, Lai, Ying-Cheng, Gavrielides, Athanasios, Kovanis, Vassilios
Copyright 2000 Elsevier Science, B.V. All Rights Reserved. The Physics Letters A journal homepage may be accessed at: http://www.sciencedirect.com/science/journal/03759601
Physica D, Ruslan L. Davidchack, Ying-Cheng Lai, Vassilios Kovanis, Athanasios Gavrielides
This paper examines the dynamical origin of low-frequency fluctuations (LFFs) in semiconductor lasers subject to timedelayed optical feedback. In particular, we study chaotic transitions leading to...
Efficient algorithm for detecting unstable periodic orbits in chaotic systems (1999)
Davidchack, Ruslan L., Lai, Ying-Cheng
We present an efficient method for fast, complete, and accurate detection of unstable periodic orbits in chaotic systems. Our method consists of a new iterative scheme and an effective technique for...
International Journal of Bifurcation and Chaos, Vol. 10, No. 3 (2000) 683 693 (1999)
World Scientific Publishing, Ying-cheng Lai, Celso Grebogi
this paper, that there exists a class of models of chaotic processes, for which severe obstruction to deterministic modeling may arise. In particular, such obstruction may occur when unstable...
Blowout bifurcation of chaotic saddles (1999)
Tomasz Kapitaniak, Ying-Cheng Lai, Celso Grebogi
Chaotic saddles are nonattracting dynamical invariant sets that can lead to a variety of physical phenomena. We describe the blowout bifurcation of chaotic saddles located in the symmetric invariant...
Theoretical Study of Controlling Chaos with Applications to Nonlinear Optical Systems (1998)
The main goal of the proposed research was to study forefront problems in nonlinear dynamics and chaos, particularly in the direction of controlling chaos, and to explore applications to lasers in...
Theoretical Study of Controlling Chaos with Applications to Nonlinear Optical Systems (1998)
The main goal of the proposed research was to study forefront problems in nonlinear dynamics and chaos, particularly in the direction of controlling chaos, and to explore applications to lasers in...
Theoretical and Experimental Studies of Chaotic Dynamics With Defense Applications (1998)
This was an AFOSR Presidential Early Career Award for Scientists and Engineers (PECASE) in 1997. The research objectives were: (1) Chaotic scattering and applications to optical micro-lasing...
Equipment for Research on Dependable Information Infrastructure (1998)
Ye, Nong, Lai, Ying-Cheng, Dasgupta, Partha
This report reviews computing and network equipment purchased through a DURIP grant and their usage for supporting a currently funded DOD/AFOSR project. The research goal of the project is to develop...
Research on Nonlinear Dynamics with Defense Applications (1998)
The objectives of this project are: (1) inducing chaos in electronic circuits, and (2) anti-jamming with stochastic resonance. In close collaboration with AFRL scientists, we developed a general...
Blowout bifurcation of chaotic saddles (1998)
Tomasz Kapitaniak, Ying-Cheng Lai, Celso Grebogi
Chaotic saddles are nonattracting dynamical invariant sets that can lead to a variety of physical phenomena. We describe the blowout bifurcation of chaotic saddles located in the symmetric invariant...
Ying-cheng Lai, Raimond L. Winslow, Comrnunieated K. Kaneko
We investigate the sensitive dependence of asymptotic attractors on both initial conditions and parameters in spatio-temporal chaotic dynamical systems. Our models of spatio-temporal systems are...
Nonhyperbolicity in classical and quantum chaos / (1992)
Thesis (Ph. D.)--University of Maryland at College Park, 1992.