Adaptive fuzzy systems and control-Design and stability analysis(Book). Li-Xin Wang Englewood Cli... more Adaptive fuzzy systems and control-Design and stability analysis(Book). Li-Xin Wang Englewood Cliffs, NJ: PTR Prentice Hall, 1994., 1994. This book develops a variety of adaptive fuzzy systems and applies them to a selected number of engineering problems. ...
Proceedings of The National Academy of Sciences, 1979
A mathematical model for the evolutionary change of restriction sites in mitochondrial DNA is dev... more A mathematical model for the evolutionary change of restriction sites in mitochondrial DNA is developed.
Decentralized and unstructured peer-to-peer networks such as Gnutella are attractive for certain ... more Decentralized and unstructured peer-to-peer networks such as Gnutella are attractive for certain applications because they require no centralized directories and no precise control over network topology or data placement. However, the flooding-based query algorithm used in Gnutella does not scale; each query generates a large amount of traffic and large systems quickly become overwhelmed by the queryinduced load. This paper explores, through simulation, various alternatives to Gnutella's query algorithm, data replication strategy, and network topology. We propose a query algorithm based on multiple random walks that resolves queries almost as quickly as Gnutella's flooding method while reducing the network traffic by two orders of magnitude in many cases. We also present simulation results on a distributed replication strategy proposed in . Finally, we find that among the various network topologies we consider, uniform random graphs yield the best performance. jaded observers the explosive increase in Peer-to-Peer (P2P) network usage has been astounding. Within a few months of Napster's introduction in 1999 the system had spread widely, and recent measurement data suggests that P2P applications are having a very significant and rapidly growing impact on Internet traffic . It is important to study the performance and scalability of these P2P networks.
Early simulation experience with wireless ad hoc networks suggests that their capacity can be sur... more Early simulation experience with wireless ad hoc networks suggests that their capacity can be surprisingly low, due to the requirement that nodes forward each others' packets. The achievable capacity depends on network size, traffic patterns, and detailed local radio interactions. This paper examines these factors alone and in combination, using simulation and analysis from first principles. Our results include both
IEEE Transactions on Systems, Man, and Cybernetics, 1992
A general method is developed to generate fuzzy rules from numerical data. This new method consis... more A general method is developed to generate fuzzy rules from numerical data. This new method consists of five steps:
Fuzzy systems are represented as series expansions of fuzzy basis functions which are algebraic s... more Fuzzy systems are represented as series expansions of fuzzy basis functions which are algebraic superpositions of fuzzy membership functions. Using the Stone-Weierstrass theorem, it is proved that linear combinations of the fuzzy basis functions are capable of uniformly approximating any real continuous function on a compact set to arbitrary accuracy. Based on the fuzzy basis function representations, an orthogonal least-squares (OLS) learning algorithm is developed for designing fuzzy systems based on given input-output pairs; then, the OLS algorithm is used to select significant fuzzy basis functions which are used to construct the final fuzzy system. The fuzzy basis function expansion is used to approximate a controller for the nonlinear ball and beam system, and the simulation results show that the control performance is improved by incorporating some common-sense fuzzy control rules.
Adaptive fuzzy systems and control-Design and stability analysis(Book). Li-Xin Wang Englewood Cli... more Adaptive fuzzy systems and control-Design and stability analysis(Book). Li-Xin Wang Englewood Cliffs, NJ: PTR Prentice Hall, 1994., 1994. This book develops a variety of adaptive fuzzy systems and applies them to a selected number of engineering problems. ...
Proceedings of The National Academy of Sciences, 1979
A mathematical model for the evolutionary change of restriction sites in mitochondrial DNA is dev... more A mathematical model for the evolutionary change of restriction sites in mitochondrial DNA is developed.
Decentralized and unstructured peer-to-peer networks such as Gnutella are attractive for certain ... more Decentralized and unstructured peer-to-peer networks such as Gnutella are attractive for certain applications because they require no centralized directories and no precise control over network topology or data placement. However, the flooding-based query algorithm used in Gnutella does not scale; each query generates a large amount of traffic and large systems quickly become overwhelmed by the queryinduced load. This paper explores, through simulation, various alternatives to Gnutella's query algorithm, data replication strategy, and network topology. We propose a query algorithm based on multiple random walks that resolves queries almost as quickly as Gnutella's flooding method while reducing the network traffic by two orders of magnitude in many cases. We also present simulation results on a distributed replication strategy proposed in . Finally, we find that among the various network topologies we consider, uniform random graphs yield the best performance. jaded observers the explosive increase in Peer-to-Peer (P2P) network usage has been astounding. Within a few months of Napster's introduction in 1999 the system had spread widely, and recent measurement data suggests that P2P applications are having a very significant and rapidly growing impact on Internet traffic . It is important to study the performance and scalability of these P2P networks.
Early simulation experience with wireless ad hoc networks suggests that their capacity can be sur... more Early simulation experience with wireless ad hoc networks suggests that their capacity can be surprisingly low, due to the requirement that nodes forward each others' packets. The achievable capacity depends on network size, traffic patterns, and detailed local radio interactions. This paper examines these factors alone and in combination, using simulation and analysis from first principles. Our results include both
IEEE Transactions on Systems, Man, and Cybernetics, 1992
A general method is developed to generate fuzzy rules from numerical data. This new method consis... more A general method is developed to generate fuzzy rules from numerical data. This new method consists of five steps:
Fuzzy systems are represented as series expansions of fuzzy basis functions which are algebraic s... more Fuzzy systems are represented as series expansions of fuzzy basis functions which are algebraic superpositions of fuzzy membership functions. Using the Stone-Weierstrass theorem, it is proved that linear combinations of the fuzzy basis functions are capable of uniformly approximating any real continuous function on a compact set to arbitrary accuracy. Based on the fuzzy basis function representations, an orthogonal least-squares (OLS) learning algorithm is developed for designing fuzzy systems based on given input-output pairs; then, the OLS algorithm is used to select significant fuzzy basis functions which are used to construct the final fuzzy system. The fuzzy basis function expansion is used to approximate a controller for the nonlinear ball and beam system, and the simulation results show that the control performance is improved by incorporating some common-sense fuzzy control rules.
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