In this paper the authors propose a flexible electronic solution, to improve the energetic efficiency of a thermo plant. This is achieved by replacing the mechanical gear box, placed traditionally between a gas turbine and a synchronous generator; by a power electronic converter. After reminding problematic of gear boxes and interest of a proposed electronic solution in high power plants, the a...

Understanding the generation and growth of nonlinear harmonic (and intermodulation) distortion in microwave amplifiers such as traveling wave tubes (TWTs), free electron lasers (FELs), and klystrons is of current research interest. Similar to FELs, the nonlinear harmonic growth rate scales with the harmonic number in TWTs. In klystrons, the wave number scaling applies to the nonlinear harmonic ...

Jon Barker and Martin Cooke fj.barker,[email protected] Department of Computer Science, University of She eld, She eld, UK ABSTRACT Progress in robust automatic speech recognition may bene t from a fuller account of the mechanisms and representations used by listeners in processing distorted speech. This paper reports on a number of studies which consider how recognisers trained on clean ...

This article aims at studying one dimensional unsteady planar and cylindrically symmetric flow involving shocks under the influence of magnetic field. The method of generalized wavefront expansion (GWE) is employed to derive a coupled system of nonlinear transport equations for the jump of field variables and of its spatial derivatives across the shock, which, in turn determine the evolution of...

Introduction. In this world of technical advancement, conventional resources are at the stage destruction. To avoid such problems, we going to use an alternative energy source namely solar by photovoltaic effect. The demand for multilevel inverters increased as they used different dynamic (high) voltage and power appliances capable producing output wave shape with low total harmonic distortion....

Distorted wave impulse approximation calculations for the (m, mp) quasifree knockout reaction on ' 0 and ~Ca have been carried out for a variety of bombarding energies and angle pairs. In general, the distortion effects arising from the interaction of the pions and protons with the target core are strong and vary with bombarding energy. The results emphasize the need to include these interactio...

We have investigated the neutrino induced coherent pion production reaction at low and intermediate energies including pion, nucleon and ∆(1232) resonance. Medium effects in the production mechanism and the distortion of the pion wave function are included in the calculation. We find a strong reduction of the cross section due to these effects and also substantial modifications in the energy di...

In migrating cells, the actin filament nucleation activity of ARP2/3 is an essential component of dynamic cell shape change and motility. In response to signals from the small GTPase Rac1, alterations in the composition and/or subcellular localization of the WAVE complex lead to ARP2/3 activation. The human WAVE complex subunit, WAVE1/SCAR1, was first identified in Dictyostelium and is a direct...

A summary is given of the principal concepts of a unified deterministic theory of fields and particles that have been developed in more detail in a previous comprehensive four-part paper (Hasselmann, 1996a,b, 1997a,b). The model is based on the Einstein vacuum equations, Ricci tensor RLM = 0, in a higher-dimensional space. A space of at least eight dimensions is required to incorporate all othe...

This paper tests key predictions of the "two-mechanism model" for the generation of distortion-product otoacoustic emissions (DPOAEs). The two-mechanism model asserts that lower-sideband DPOAEs constitute a mixture of emissions arising not simply from two distinct cochlear locations (as is now well established) but, more importantly, by two fundamentally different mechanisms: nonlinear distorti...