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Determining association rules of significant interest is an essential task within data mining and statistical analysis. In this paper, we first precisely define the notion of association rule. For this, we introduce a general model, which includes the usual transaction model, and which allows many operations on the association rules. Then, we interpret association rules as statistical decision rules. This interpretation leads to four decisional measures, one of them being the usual confidence. Then, we give some strategies based on the use of these four decisional measures in order to select or to construct association rules with a given consequent. We finally present an experimental study to illustrate these strategies. This study is carried out in R language, with the R‐package we specifically built for association rules mining. [ABSTRACT FROM AUTHOR]

Geochemical study of hydrothermal apatite and scheelite pairs from different kinds of W ore deposits to explore rare earth elements (REE) partitioning between these minerals revealed the development of only five of the 18 examined pairs under equilibrium conditions. Three pairs possessed extremely different REE trends, suggesting crystallization from distinct fluids.

Highlights: [•] The role of the transient phase from aerated to anoxic on iron corrosion is studied. [•] Ferrous carbonates are formed at the metallic interface in a ferric corrosion layer. [•] The corrosion rate corresponds to a general corrosion mechanism in an anoxic medium. [ABSTRACT FROM AUTHOR]

Abstract: Doppler broadening of annihilation gamma-line combined with a slow positron beam (SPB) was used to measure the momentum density distribution of annihilating pairs in a set of sintered UO2 samples implantated with 800-keV 136Xe2+ at fluences of 1×1015 and 1×1016 Xecm−2. The effect of prolonged post-implantation annealing at 1673 and 1873K, grain size, and 152-MeV Iodine irradiation were studied by analysis of S(E) profiles and S-W maps and discussed versus secondary ion mass spectroscopy (SIMS), scanning transmission electron microscopy results. Spectroscopy with SPB and SIMS is an excellent combination of complementary techniques for studying the formation and evolution of Xe-bubbles, and Xe retention. [Copyright &y& Elsevier]