This paper presents a model of the excitation corresponding to the hammer impact in a hybrid piano model. An experimental setup permits the measurement of the signal at the bridge location. The signal is separated into an excitation and resonant contribution. This work focuses on the modeling of the excitation part using both physical and perceptually relevant parameters. The resulting model ca...

Bounds on the optimal value of a convex 0-1 quadratic programming problem with linear constraints can be improved by a preprocessing step that adds to the quadratic objective function terms which are equal to 0 for all 0-1 feasible solutions yet increase its continuous minimum. The continuous and the CHR bounds are improved if one first uses Plateau’s QCR method (2005), or one of its predecesso...

The abilities of 26 marine and 12 other Pseudomonas-like strains of bacteria to grow on single carbon sources, their antibiotic sensitivities and complement of some enzymes of intermediary metabolism were numerically analysed and gave five phenons. Two phenons contained strains with more than 55 mol % GC and were regarded as Pseudomonas spp., two were similar to the genus AZteromonas, and one w...

The article presents the results of theoretical research on influence design parameters output characterictics a hydraulic hammer. hammer under study has percussive mechanism permanent pressure-type structure with spool free control unit. A model unit been developed. mathematical is presented. oscillogram resulting from studies, which defines operation mechanism, range rational zones for select...