Geometric Near-neighbor Access Tree (GNAT) is a metric space indexing method based on hierarchical hyperplane partitioning of the space. While GNAT is very efficient in proximity searching, it has a bad reputation of being a memory hog. We show that this is partially based on too coarse analysis, and that the memory requirements can be lowered while at the same time improving the search efficie...

The immune system offers to be a rich source of metaphors to guide the exploration of the notion of an adaptive system. We might define a class of systems which are inspired by, but diverge from, descriptions of the immune system, and refer to them as immune-bused systems. The research reported here is motivated by a desire to explore the possibilities of such systems. Specifically, we attempt ...

It is attempted to extend a two-step without memory method to it's with memory. Then, a new two-step derivative free class of without memory methods, requiring three function evaluations per step, is suggested by using a convenient weight function for solving nonlinear equations. Eventually, we obtain a new class of methods by employing a self-accelerating parameter calculated in each iterative...

Designing generic problem solvers that perform well across a diverse set of problems is a challenging task. In this work, we propose a hyper-heuristic framework to automatically generate an effective and generic solution method by utilizing grammatical evolution. In the proposed framework, grammatical evolution is used as an online solver builder, which takes several heuristic components (e.g. ...

Recent studies have shown that working memory can be improved through training and this improvement generalizes to other cognitive measures. Working memory studies typically focus on the retention of random sequences; however, much of what working memory is used for is not random. This study investigated what effect probabilistic structure has on adaptive training of working memory and how diff...

in this work, nanostructured niti shape memory alloy with equal atomic percentage was produced through mechanical alloying. the result exhibited that after 60 h of mechanical alloying of high purity elemental powder mixtures of nickel and titanium by a planetary high-energy ball mill, the ti dissolved into ni lattice and niti (b2) phase with was obtained. the xrd investigations, sem observation...