Etude expérimentale du soudage par laser YAG de l'alliage base nickel Hastelloy X

Etude expérimentale de la distribution des bordures de motifs fréquents

The discovery of the positive border of frequent itemsets (or maximal frequent itemsets) in a transactional database is a classic problem in data mining. Dataset characteristics naturally have an important impact on the algorithms performances. The number of transactions, the average size of the transactions or the "density" are generally the studied characteristics. From experiments we studied...

Transition de phase ferroélastique du phosphate de plomb. Etude par diffusion inélastique des neutrons

2014 An inelastic neutron scattering study of the ferroelastic phase transition in lead phosphate has revealed in the high temperature phase the existence of a zone boundary soft mode whose character is compatible with the structure change at the transition. The analysis of the observed spectral line shape shows that this soft mode is overdamped between Tc and Tc + 100 K. The quasiharmonic freq...

Investigation of Microstructure weld zone of Hastelloy X Pulsed Nd-YAG laser welds

In the present study, the microstructure of welded zone of Hastelloy X sheets with thickness of 1 mm via pulsed Nd-YAG laser welding were studied. This welding process was done by autogenus and conductive method. Microstructure were observed by metallurgical OM and SEM. Results shown Solidification of the weld metal is dendritic. The dendrites in the central zone of the welding are fine and equ...

Etude biochimique du genre Brucella par une micromethode normalisee.

La conservation du virus de la peste bovine par lyophilisation