In the title compound, [Zn(4)(C(16)H(10)N(4)O(2))(4)]·4H(2)O, the N'-[(8-oxidoquinolin-7-yl)methyl-idene]isonicotinohydrazidate (L(2-)) ligand binds to the metal ions, forming stable five- and six-membered chelate rings, leaving the pyridyl groups free. The compound is a tetra-nuclear Zn(II) complex centered about a fourfold roto-inversion axis, with the ligand coordinating in the doubly deprot...

In the title dihydrate salt, 2C12H24N(+)·SO4 (2-)·2H2O, the cation possesses twofold rotational symmetry, with the N atom situated on the twofold axis. The sulfate anion has fourfold roto-inversion symmetry, with the S atom located on the -4 axis. In the crystal, the components are linked via ammonium-sulfate N-H⋯O and water-sulfate O-H⋯O hydrogen bonds, forming a three-dimensional network.

Nel lavoro si descrive l’applicazione di tecniche di IA per l’elaborazione e l’allineamento di immagini provenienti da scanner 3D, in grado di generare modelli digitali tridimensionali. Al fine di allineare più correttamente i fotogrammi acquisiti, in scansioni successive, dal dispositivo e ricostruire accuratamente il modello tridimensionale digitale, si è integrata la tecnica di Simulated Ann...

In recent years the use of convolutional layers to encode an inductive bias (translational equivariance) in neural networks has proven be a very fruitful idea. The successes this approach have motivated line research into incorporating other symmetries deep learning methods, form group equivariant networks. Much work been focused on roto-translational symmetry $\mathbf R^d$, but examples are sc...