Resumen. Sin lugar a duda el algoritmo K-means es el más utilizado en la comunidad de aprendizaje no supervisado. Desafortunadamente es muy sensible a la selección de los centroides iniciales. Debido a ello, se han propuesto un gran número de métodos para la selección de los centros iniciales. En este artículo se presenta un algoritmo de agrupamiento que tiene como base al algoritmo K-means, en...

Stochastic local search (SLS) algorithms are well known for their ability to efficiently find models of random instances of the Boolean satisfiablity (SAT) problem. One of the most famous SLS algorithms for SAT is WalkSAT, which is an initial algorithm that has wide influence among modern SLS algorithms. Recently, there has been increasing interest in WalkSAT, due to the discovery of its great ...

We calculate the decay couplings and first two Gegenbauer moments of the leading twist light-cone distribution amplitudes of K and K∗ from QCD sum rules, including NLO perturbative effects. Submitted to Physical Review D ∗[email protected] †[email protected]

Three echinoderms, a crustacean, a mollusc and a coelenterate were injected with either [2-14C]mevalonate and unlabelled menadione (2-methyl-1,4-naphthaquinone) or 2-[14C]methyl-1,4-naphthaquinone. In each case the label was incorporated into menaquinone-4.[2-14C]Mevalonate was incorporated into menaquinone-4 in the crab (Carcinus maenas) only in the presence of menadione, the organism presumab...