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Optimizing Hydropower Reservoir Operation Using Hybrid Genetic Algorithm and Chaos
Cheng, Chun-Tian; Wang, Wen-Chuan; Xu, Dong-Mei; Chau, K. - In: Water Resources Management 22 (2008) 7, pp. 895-909
convergence, slow iterations to reach the global optimal solution and getting stuck at a local optimum. A novel chaos genetic … algorithm (CGA) based on the chaos optimization algorithm (COA) and genetic algorithm (GA), which makes use of the ergodicity … and internal randomness of chaos iterations, is presented to overcome premature local optimum and increase the convergence …
Persistent link: https://www.econbiz.de/10010794658
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Optimality-based bound contraction with multiparametric disaggregation for the global optimization of mixed-integer bilinear problems
Castro, Pedro; Grossmann, Ignacio - In: Journal of Global Optimization 59 (2014) 2, pp. 277-306
We address nonconvex mixed-integer bilinear problems where the main challenge is the computation of a tight upper bound for the objective function to be maximized. This can be obtained by using the recently developed concept of multiparametric disaggregation following the solution of a...
Persistent link: https://www.econbiz.de/10010793966
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Polynomial chaos-based parameter estimation methods applied to a vehicle system
Blanchard, Emmanuel D; Sandu, Adrian; Sandu, Corina - 2010
expensive. The polynomial chaos approach has been shown to be more efficient than Monte Carlo for quantifying the effects of … polynomial chaos theory for parameter estimation: a Bayesian approach, and an approach using an extended Kalman filter (EKF) to … obtain the polynomial chaos representation of the uncertain states and the uncertain parameters. The two methods are applied …
Persistent link: https://www.econbiz.de/10009457571
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Spatial economic self-organization with periodic and quasiperiodic dynamics
Heikkinen, Tiina - In: Review of Regional Research 29 (2009) 2, pp. 161-183
The formation of regions through spatial self-organization is a key issue in spatial economics. The standard approach to the modelling of space in regional science has been to assume that space can be modelled as a one-dimensional system, often locations arrayed on a circle. This paper studies...
Persistent link: https://www.econbiz.de/10010994675
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Complexity Theory of Natural Disasters; Boundaries of Self-Structured Domains
Scheidegger, A. - In: Natural Hazards 16 (1997) 2, pp. 103-112
-organized ordered states 'at the edge of chaos', with a fractal attractor. Short of complete breakdown, such systems re-establish order …-stationarity at the edge of chaos are represented by finite windows, the power-law does not cover all magnitudes. The stationarity …
Persistent link: https://www.econbiz.de/10010846402
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Complexity with Heterogeneous Fundamentalists and a Multiplicative Price Mechanism
Naimzada, Ahmad K; Ricchiuti, Giorgio - Dipartimento di Scienze per l'Economia e l'Impresa, … - 2013
In contrast with the canonical models, Naimzada and Ricchiuti (2008, 2009) show that the interaction of groups of agents who have the same trading rule but present different beliefs about the fundamental value could be a source of instability in financial markets. Differently from Naimzada and...
Persistent link: https://www.econbiz.de/10010857761
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Jamming transition in traffic flow on triangular lattice
Nagatani, Takashi - In: Physica A: Statistical Mechanics and its Applications 271 (1999) 1, pp. 200-221
Phase transitions and critical phenomena are investigated in the two-dimensional traffic flow on the triangular lattice numerically and analytically. The two-dimensional traffic model on the square lattice is extended to the traffic flow on the triangular lattice where the three roads cross on a...
Persistent link: https://www.econbiz.de/10010872924
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Spatiotemporal chaos in mixed linear–nonlinear coupled logistic map lattice
Zhang, Ying-Qian; Wang, Xing-Yuan - In: Physica A: Statistical Mechanics and its Applications 402 (2014) C, pp. 104-118
We investigate the spatiotemporal dynamics with mixing degrees of nonlinear chaotic maps in coupling connections. Here, the coupling methods between lattices are both linear neighborhood coupling and the nonlinear chaotic map coupling of lattices. While strictly nearest neighborhood coupling is...
Persistent link: https://www.econbiz.de/10010873038
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The production of Tsallis entropy in the limit of weak chaos and a new indicator of chaoticity
Lukes-Gerakopoulos, G.; Voglis, N.; Efthymiopoulos, C. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 8, pp. 1907-1925
We study the connection between the appearance of a ‘metastable’ behaviour of weakly chaotic orbits, characterized by a constant rate of increase of the Tsallis q-entropy [C. Tsallis, Possible generalization of Boltzmann–Gibbs Statistics, Journal of Statistical Physics 52 (1988)...
Persistent link: https://www.econbiz.de/10010873089
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Modified circle map model for complex motion induced by a change of shuttle buses
Nagatani, Takashi - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 16, pp. 3392-3401
We investigate the dynamic behavior of shuttle buses when passengers switch to another bus B on route B from bus A on route A. By switching from bus A to bus B, the outflow of passengers from route A (inflow of passengers into route B) changes to the periodic inflow of a square wave. The...
Persistent link: https://www.econbiz.de/10010873218