129 research outputs found
Background on game modeling as a means of education for the elderly
Get PDFConsidering the current situation and background of elderly education, it is shown that game modeling has certain potential as a teaching method of elderly education
ЦИФРОВЫЕ БАНКИ ФИЛЬТРОВ ДЛЯ СОВРЕМЕННЫХ ЗАДАЧ ОБРАБОТКИ ЗВУКОВЫХ СИГНАЛОВ
Get PDFThe paper reviews techniques of digital filter bank synthesis that can be applied for contemporary speech processing challenges. The paper describes practical experience of using digital filter banks in original systems of sound processing, namely, musical player with noise-aware audio enhancement and hearing aid application for a smartphone.В работе выполнен обзор способов синтеза цифровых банков фильтров, которые могут применяться для решения современных прикладных задач обработки звуковых сигналов. Описывается практический опыт использования цифровых банков фильтров в оригинальных системах обработки звука: музыкальном плеере с функцией повышения разборчивости звучания при прослушивании в шумной акустической обстановке, а также слуховом аппарате на базе смартфона
A mathematical model of odor dispersion from a wastewater treatment plant
No full textSmell is an important criterion of the quality of atmospheric air. The paper looks at quantitative and qualitative methods of odor assessment and describes the method of field olfactometry. Studies were carried out on the spread of odor from the WWTP OAO OKOS in the Kaliningrad region of Russia which resulted in 817 measurements. For each measurement, the following parameters were recorded: odor strength (D/T), odor character, atmospheric pressure (mmHg), temperature (°C), relative humidity (%), wind speed (m/s), wind direction and the the point where a measurement was taken. A mathematical model is given of the dependence of odor strength on the distance to two sources s1 (m) and s2 (m) and the wind direction from a straight line passing through a given point and a source 1 — a1 or a source 2 — a2
AN EFFICIENT SPEECH GENERATIVE MODEL BASED ON DETERMINISTIC/STOCHASTIC SEPARATION OF SPECTRAL ENVELOPES
Get PDFThe paper presents a speech generative model that provides an efficient way of generating speech waveform from its amplitude spectral envelopes. The model is based on hybrid speech representation that includes deterministic (harmonic) and stochastic (noise) components. The main idea behind the approach originates from the fact that speech signal has a determined spectral structure that is statistically bound with deterministic/stochastic energy distribution in the spectrum. The performance of the model is evaluated using an experimental low-bitrate wide-band speech coder. The quality of reconstructed speech is evaluated using objective and subjective methods. Two objective quality characteristics were calculated: Modified Bark Spectral Distortion (MBSD) and Perceptual Evaluation of Speech Quality (PESQ). Narrow-band and wide-band versions of the proposed solution were compared with MELP (Mixed Excitation Linear Prediction) speech coder and AMR (Adaptive Multi-Rate) speech coder, respectively. The speech base of two female and two male speakers were used for testing. The performed tests show that overall performance of the proposed approach is speaker-dependent and it is better for male voices. Supposedly, this difference indicates the influence of pitch highness on separation accuracy. In that way, using the proposed approach in experimental speech compression system provides decent MBSD values and comparable PESQ values with AMR speech coder at 6,6 kbit/s. Additional subjective listening testsdemonstrate that the implemented coding system retains phonetic content and speaker’s identity. It proves consistency of the proposed approach.The paper presents a speech generative model that provides an efficient way of generating speech waveform from its amplitude spectral envelopes. The model is based on hybrid speech representation that includes deterministic (harmonic) and stochastic (noise) components. The main idea behind the approach originates from the fact that speech signal has a determined spectral structure that is statistically bound with deterministic/stochastic energy distribution in the spectrum. The performance of the model is evaluated using an experimental low-bitrate wide-band speech coder. The quality of reconstructed speech is evaluated using objective and subjective methods. Two objective quality characteristics were calculated: Modified Bark Spectral Distortion (MBSD) and Perceptual Evaluation of Speech Quality (PESQ). Narrow-band and wide-band versions of the proposed solution were compared with MELP (Mixed Excitation Linear Prediction) speech coder and AMR (Adaptive Multi-Rate) speech coder, respectively. The speech base of two female and two male speakers were used for testing. The performed tests show that overall performance of the proposed approach is speaker-dependent and it is better for male voices. Supposedly, this difference indicates the influence of pitch highness on separation accuracy. In that way, using the proposed approach in experimental speech compression system provides decent MBSD values and comparable PESQ values with AMR speech coder at 6,6 kbit/s. Additional subjective listening testsdemonstrate that the implemented coding system retains phonetic content and speaker’s identity. It proves consistency of the proposed approach
Spectrum estimation of speech: coding and feature extraction
Get PDFSpeech analysis and spectrum estimation has been the fundamental problem of digital signal processing for recent decades. The problem still has a huge practical impact on modern speech processing applications
that involve coding and deep learning. The paper reviews the main speech spectral estimation techniques including
linear prediction and cepstrum
Українське ісламознавство в контексті проблеми дослідження радикального джихадізму
Get PDFObtaining data on the results of the study of Ukrainian scholars on radical
Jihadism is the purpose of this study. To achieve this goal, the study uses analysis
and hermeneutics as its research methods. The research found that in the Ukrainian
Islamic studies, there are now five main areas of research: theoretical, historical,
social, economical and the area of security provision. In Ukraine, the problem
of radical Jihadism is considered within the framework of the security research
direction. The study showed that the security trend in Ukrainian Islamic studies
is still poorly presented. A few studies have been written on this topic. Among the
authors dealing with this problem, it is necessary to name such researchers as
M. Azarov, S. Zin’ko, M. Kiryushko, S. Kuzmin, O. Licarenko, V. Ostroukhov, and
V. Petryk. In particular, V. Ostroukhov, O. Likarenko, and V. Petrik identified six
signs that separate Islamist extremism from moderate Islam. S. Zin’ko argued that
Europe has not yet developed a pan–European approach to counteracting radical
Islam. The implementation of large–scale scientific research projects on the study of
the dangers of radical Jihadism is still ahead in Ukraine
Halotherapy in the Early Postoperative Period of Restoration of a Curved Nose Partition Abstract. The article discusses the eff ectiveness of halotherapy methods in the
No full textMethodology for the ecological environmental impact assessment of the forest fire consequences under complex radiation conditions of fire load
No full textIn the paper, the methodology for the ecological environmental impact assessment of the forest fire consequences under complex radiation conditions of fire load has been proposed on the basis of the scientific researches of leading experts in the field of forest fires simulation, such as Abramov Yu. O., Komyak V. O., Kutsenko L. M., Lytvyn N. V., Pokrovsky R. L., Tarasenko O. A., Vasyliev S. V., Soznik O. P.
The analysis determines that the stochastic nature of the processes of forest fires occurrence, development, extension and variation of the degree of vegetation burning in the forest areas depend on the fire load, season of the year and other fire-technical and meteorological factors, which in turn are complicated by the content of radionuclides with different activity times. The information base of this technique is a model where forest is considered as a single-layer two-phase medium consisting of air and gaseous pyrolysis products during combustion of forest combustible materials and their solid pyrolysis products.
While constructing a physical-mathematical model of a two-phase heterogeneous mixture the methods of solid-state mechanics was used, which made it possible to present the fire load as a two-component continuum with interpenetrating phase motion and interphase mass, momentum, and energy exchange.
During the research, the adequacy of the proposed methodological apparatus was checked and the main directions of its further application as a basis for solving the problems of forecasting the negative environmental impact on the environment were determined.
The practical significance of the obtained results is the possibility of their use for complex ecological audits of the territory which is subject to the secondary radiation influence both inside and outside the exclusion zone of the Chornobyl NPP
The Evaluation of Impact of Cable Power Lines on the Environment
Get PDFThe thermal impact of cable power lines and structural materials of cables on the environment has been considered. A quantitative evaluation of the thermal impact of electrical cables with cross-linked polyethylene insulation on the environment was carried out using the Elcut program. Analysis of the temperature field near the loaded cable line of 10 kV demonstrated high values of soil temperature that negatively affects its redox potential and living organisms. To evaluate the environmental impact of electrical cable materials, an approach has been developed that takes into account not only the toxicity of the materials but also their volumetric content in the cable. Cable lines with cables with traditional paper-oil insulation cause more damage to the environment than cable lines with cables, insulated with crosslinked polyethylene. The environment, in turn, also has an impact on the electrical cables: the values of long-term permissible load currents depend on the ambient temperature (when laying cables in the open air, in an earthen trench or in cable rooms). The impact of solar radiation on the thermal conditions of the electric cable is estimated. A comparative analysis of the complex environmental impact of electric cables with traditional insulation and insulation of crosslinked polyethylene demonstrated that unarmored cable with crosslinked polyethylene insulation at a voltage of 10 kV (regardless of the type of its shell) causes less damage to the environment than the same traditional cable throughout the considered temperature range on their surfaces
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