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The longest common extension (LCE) problem is to prepro-cess a string in order to allow for a large number of LCE queries, such that the queries are efficient. The LCE value, LCEs(i, j), is the length of the longest common prefix of the pair of suffixes starting at index i and j in the string s. The LCE problem can be solved in linear space with constant… (More)

Parametrized surrogate models are used in alloy modeling to quickly obtain otherwise expensive properties such as quantum mechanical energies, and thereafter used to optimize, or simply compute, some alloy quantity of interest, e.g., a phase transition, subject to given constraints. Once learned on a data set, the surrogate can compute alloy properties… (More)

The cluster expansion enables fast alloy property computations especially useful for predicting alloy thermodynamics. It expands configurational alloy properties in basis functions called clusters with associated expansion coefficients called effective cluster interactions (ECI) which must be learned. The number of ECI increases when the symmetries of the… (More)

The cluster expansion enables fast alloy property computations especially useful for predicting alloy thermodynamics. It expands configurational alloy properties in basis functions called clusters with associated expansion coefficients called effective cluster interactions (ECI). The number of ECI depends on the symmetries of the system. Therefore, when… (More)

Cluster expansions are simplified, Ising-like models for binary alloys in which vibrational and electronic degrees of freedom are coarse grained. The usual practice is to learn the parameters of the cluster expansion by fitting the energy they predict to a finite set of ab initio calculations. In some cases, experiments suggest that such approaches may lead… (More)

This article describes the use of Software Defined Radio over the Software Controlled Radio in a cooperative wireless network in an OFDM based downlink scenario. The article argues that although the state of the art of SCR is considered superior with respect to implementation factors such as complexity, cost and efficiency, the SDR offers a degree of… (More)

- Jesper Michael Kristensen, Frank H.P. Fitzek, Peter, Ramjee Prasad
- 2005

— This paper motivates the application of Software defined radio as the enabling technology in the implementation of future wireless terminals for 4G. It outlines the advantages and disadvantages of SDR in terms of Flexibility and reconfigurability versus computational complexity. To mitigate the expected increase in complexity leading to a decrease in… (More)

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