20,039,130 research outputs found
Global synchronization control of general delayed discrete-time networks with stochastic coupling and disturbances
Copyright [2008] IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected].
By choosing to view this document, you agree to all provisions of the copyright laws protecting it.In this paper, the synchronization control problem is considered for two coupled discrete-time complex networks with time delays. The network under investigation is quite general to reflect the reality, where the state delays are allowed to be time varying with given lower and upper bounds, and the stochastic disturbances are assumed to be Brownian motions that affect not only the network coupling but also the overall networks. By utilizing the Lyapunov functional method combined with linear matrix inequality (LMI) techniques, we obtain several sufficient delay-dependent conditions that ensure the coupled networks to be globally exponentially synchronized in the mean square. A control law is designed to synchronize the addressed coupled complex networks in terms of certain LMIs that can be readily solved using the Matlab LMI toolbox. Two numerical examples are presented to show the validity of our theoretical analysis results.This work was supported by the Royal Society Sino-British Fellowship Trust Award of the
U.K
Global synchronization for discrete-time stochastic complex networks with randomly occurred nonlinearities and mixed time delays
Copyright [2010] IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.In this paper, the problem of stochastic synchronization analysis is investigated for a new array of coupled discrete-time stochastic complex networks with randomly occurred nonlinearities (RONs) and time delays. The discrete-time complex networks under consideration are subject to: (1) stochastic nonlinearities that occur according to the Bernoulli distributed white noise sequences; (2) stochastic disturbances that enter the coupling term, the delayed coupling term as well as the overall network; and (3) time delays that include both the discrete and distributed ones. Note that the newly introduced RONs and the multiple stochastic disturbances can better reflect the dynamical behaviors of coupled complex networks whose information transmission process is affected by a noisy environment (e.g., Internet-based control systems). By constructing a novel Lyapunov-like matrix functional, the idea of delay fractioning is applied to deal with the addressed synchronization analysis problem. By employing a combination of the linear matrix inequality (LMI) techniques, the free-weighting matrix method and stochastic analysis theories, several delay-dependent sufficient conditions are obtained which ensure the asymptotic synchronization in the mean square sense for the discrete-time stochastic complex networks with time delays. The criteria derived are characterized in terms of LMIs whose solution can be solved by utilizing the standard numerical software. A simulation example is presented to show the effectiveness and applicability of the proposed results
Texas A&M University at Galveston
Located in Galveston, Texas, the Marine Science Department offers several undergraduate degree programs and a graduate degree program in marine resources management. The department also conducts cutting edge research in oceanography, theory, and marine policy. Site offers curriculum and admissions information, as well as all the latest news and events, and photos of the lab and students doing research. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division
Plankton Tow Project
This activity focuses on constructing a plankton net using materials found around the house. Students must think of items that could be used for the different parts of the plankton net, including towing bridle, hoop or collar, filtering material, and collector. Each component has its own thought-provoking questions to help students understand its function and why it is important to the system. The two supplemental worksheets are available from the COSEE-NE OSEI resource site. Educational levels: Middle school, High school
Dugong dugon
Species profile of the dugong, Dugong dugon, including taxonomic classification, geographic range, biogeographic region, habitat, physical description, diet, behavior, reproduction, economic importance to humans and conservation status. Selected references and glossary are provided. Classification feature provides links to descriptions of each taxon, e.g. Animalia, Mammalia, Sirenia, etc., including images and details on anatomical features used in differentiating at each level. Appropriate for grades 7 and up. Educational levels: Middle school, High school
University of Maryland Eastern Shore
Found in Princess Anne, MD, UMES offers students the opportunity to earn a BS in Marine Science and/or an MS in several disciplines of Marine Sciences. A five year program is also available where students graduate with a BS and MS in Marine Sciences. Educational levels: High school, Undergraduate lower division, Undergraduate upper division
National Marine Educators Association Awards
Award information and nomination form for NMEA awards: Outstanding Teacher Award, James Centorino Award (non-traditional educator award), Marine Education Award, and Honorary Member Award. Nominations are due May 1. Educational levels: Graduate or professional
Skidaway Institute of Oceanography
SkIO is a multidisciplinary research institution within the University System of Georgia and is located on a 700 acre campus on Skidaway Island, 16 miles southeast of Savannah. The Institute sits on the banks of the Skidaway River, with access to a diverse range of estuarine and coastal habitats. Site features a wealth of information regarding SkIO's research and education programs. Data, figures, and more are available in the Research section. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division
Oysters
Provides a history of the fishery for American oyster (Crassostrea virginica) in Chesapeake Bay, the debate over oyster farming vs. hunting, and numerous articles on oyster management. Research and restoration section includes oyster biology, research questions, technical training opportunities, step-by-step oyster gardening instructions and more. Non-native oysters are covered in species profiles, reports and position papers. Education resources include 4 lesson plans with background information, labs and experiments; NSTA SciLinks selected materials. Educational levels: Middle school, High school
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