Spatial Distribution of Gas Temperature in an Air Plasma Jet of Direct Current Glow Microdischarge

Technical Physics Letters - The spatial distribution of gas temperature in air plasma jet of dc glow microdischarge has been determined. The temperature field was measured by a thermocouple probe...     

Goniophotometric laser Stokes-polarimeter

An automated Stokes-polarimeter with a rotating phase plate has been developed to measure the polarization characteristics of radiation reflected and scattered by objects at different angles to the surface. An estimate is made of the systematic error due to variation of the initial position of the fast axis of the phase plate and deviation of the phase difference of the λ/4 plate from 90°. Translated from Izmeritel'naya Tekhnika, No. 1, pp. 22–26, January, 2000.     

Design of speaker verification systems with the use of an algorithm of Dynamic Time Warping (DTW)

The problem of designing a system for speaker verification under the condition that the pronunciation of a phrase is nonuniform in time is considered. The DTW algorithm is studied as a method for smoothing a sequence of speech characteristics in time for improvement of the quality of further processing and making decision about verification. Geppener Vladimir Vladimirovich. Born 1940. Graduated from the Leningrad Electrotechnical Institute in 1964. Received candidate’s degree (in Engineering) in 1969 and Doctoral degree (in Engineering) in 2000. Professor at the Chair of Mathematical Software and Computer Applications of the St. Petersburg Electrotechnical University. Scientific interests are connected with the use of methods of artificial intelligence in systems of signal processing. Author and coauthor of more than 150 scientific publications. Haidar Adel S. Born 1964. Graduated from the Khar’kov Polytechnical Institute in 1988. Since 1989 worked as a programmer at the Center of Statistical Investigations in Aden (Yemen) and as an assistant professor at the Aden University. In 2001–2004, post-graduate student at the St. Petersburg Electrotechnical University. Scientific interests: pattern recognition, speech technologies, and digital signal processing. Author of 10 papers on computer methods for speech recognition. Simonchik Konstantin K. Born 1983. Since 2000, a student of the Chair of Mathematical Software and Computer Applications of the St. Petersburg Electrotechnical University. Scientific interests: pattern recognition, speech technologies, and adaptive and recurrent filtering. Author of 3 papers on applications of digital signal processing.