A theoretical framework for analysis of speech enhancement algorithms is introduced for performance assessment of spectral subtraction type of methods. The quality of the enhanced speech is related to physical quantities of the speech and noise (such as stationarity time and spectral flatness), as well as to design variables of the noise suppressor. The derived theoretical results are compared ...

Lagrangian control systems that are diierentially at with at outputs that only depend on connguration variables are said to be connguration at. We provide a complete characterisation of connguration atness for systems with n degrees of freedom and n ?1 controls whose range of control forces only depends on connguration and whose Lagrangian has the form of kinetic energy minus potential. The met...

Bézier curve flattening by recursive subdivision requires that the maximum excursion of the subdivided curve segment be known so that recursion can be terminated once this value drops below the specified flatness criterion. A much more accurate method than the most commonly used techniques to evaluate this distance is presented. This method stops recursion sooner, significantly reducing the num...

We show that if the presently observed L/E-flatness of the electron-like event ratio in the Super-Kamiokande atmospheric neutrino data is confirmed then the indicated ratio must be unity. Further, it is found that once CP is violated the exact L/E flatness implies: (a) The CP-violating phase, in the standard parameterization, is narrowed down to two possibilities ±π/2, and (b) The mixing betwee...

Considering one of the most popular examples of flat system, namely the two dimensional crane, this paper shows how bicausality can be used in order to analyse its bond graph model as far as flatness is concerned. More generally, it will be seen how applying this concept both allows verifying the flatness property of a system and deriving the open-loop control laws that result from it in a syst...

A series of tests were conducted to evaluate the accuracy of a diode detector array in measuring flatness and symmetry of x-ray and electron energies, and the ability to determine change in beam energy. The results show the diode detector array accurately measures flatness and symmetry and can accurately measure or detect change in beam energy. The evaluation also demonstrates the utility of us...