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Fast Fourier Transform for Fitness Landscapes

Rockmore, Dan; Kostelec, Peter; Hordijk, Wim; Stadler, … - Santa Fe Institute - 1999

We cast some classes of fitness landscapes as problems in spectral analysis on various Cayley graphs. In particular, landscapes derived from RNA folding are realized on Hamming graphs and analyzed in terms of Walsh transforms; assignment problems are interpreted as functions on the symmetric...

Persistent link: https://www.econbiz.de/10005790638

LEARNING, EVOLUTION AND POPULATION DYNAMICS

JOST, JÜRGEN; LI, WEI - In: Advances in Complex Systems (ACS) 11 (2008) 06, pp. 901-926

We study a complementarity game as a systematic tool for the investigation of the interplay between individual optimization and population effects and for the comparison of different strategy and learning schemes. The game randomly pairs players from opposite populations. It is symmetric at the...

Persistent link: https://www.econbiz.de/10005047469

Random walk distances in data clustering and applications

Liu, Sijia; Matzavinos, Anastasios; Sethuraman, Sunder - In: Advances in Data Analysis and Classification 7 (2013) 1, pp. 83-108

In this paper, we develop a family of data clustering algorithms that combine the strengths of existing spectral approaches to clustering with various desirable properties of fuzzy methods. In particular, we show that the developed method “Fuzzy-RW,” outperforms other frequently used...

Persistent link: https://www.econbiz.de/10010995275

Random matrix analysis of network Laplacians

Jalan, Sarika; Bandyopadhyay, Jayendra N. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 2, pp. 667-674

We analyse the eigenvalue fluctuations of the Laplacian of various networks under the random matrix theory framework. Analyses of random networks, scale-free networks and small-world networks show that the nearest neighbor spacing distribution of the Laplacian of these networks follow Gaussian...

Persistent link: https://www.econbiz.de/10010873013

The Geometry of Regular Trees with the Faber-Krahn Property

Leydold, Josef - Santa Fe Institute - 1998

In this paper we prove a Faber-Krahn-type inequality for regular trees and give a complete characterization of extremal trees. The main tools are rearrangements and perturbation of regular trees.

Persistent link: https://www.econbiz.de/10005260378

Fitness Landscapes Arising from the Sequence-Structure Maps of Biopolymers

Stadler, Peter F. - Santa Fe Institute - 1997

Fitness landscapes are an important concept in molecular evolution since evolutionary adaptation as well as {\it in vitro} selection of biomolecules can be viewed as a hill-climbing-like process. Global features of landscapes can be described by statistical measures such as correlation functions...

Persistent link: https://www.econbiz.de/10005623634

Innovation, Recombination and Technological Proximity

Cecere, Grazia; Ozman, Muge - In: Journal of the Knowledge Economy 5 (2014) 3, pp. 646-667

This article investigates the relation between recombinative capabilities, innovation and alliance strategies for 71 firms in the Information Communication Technologies (ICT) sector, through a panel data analysis. In particular, it explores the impact of two factors on innovation. The first is...

Persistent link: https://www.econbiz.de/10010949506

EXTINCTION IN GENETIC BIT-STRING MODEL WITH SEXUAL RECOMBINATION

STAUFFER, D.; CEBRAT, S. - In: Advances in Complex Systems (ACS) 09 (2006) 01, pp. 147-156

We have analyzed the relations between the mutational pressure, recombination and selection pressure in the bit … where populations can survive. In this phase, recombination enhances the survival probability. Even if recombination is … of recombinations and recombination-associated mutations can self-organize in Nature. Partitioning the diploid genome …

Persistent link: https://www.econbiz.de/10005080904

Inelastic scattering of oppositely charged polarons in conjugated polymers

An, Z.; Di, B.; Zhao, H.; Wu, C. Q. - In: The European Physical Journal B - Condensed Matter and … 63 (2008) 1, pp. 71-77

Within an one-dimensional tight-binding model, we investigate the inelastic scattering processes of oppositely charged polarons in conjugated polymers under the influence of an external electric field, by using a nonadiabatic evolution method. It is found that the polaron pair does not...

Persistent link: https://www.econbiz.de/10009280432

Influence of the electric characteristics of II–VI semiconductor material on the electroluminescence of lanthanide complex

Zhang, F.-J.; Xu, Z.; Lv, Y.-G.; Zhang, J.-C.; Zhao, S. L. - In: The European Physical Journal B - Condensed Matter and … 52 (2006) 2, pp. 245-248

: impacted excitation and injected recombination for the combined structural device. The electroluminescence (EL) intensity of …

Persistent link: https://www.econbiz.de/10009281520