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RISS 인기검색어
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- 저자 : 黃守容 (검색결과 25 건)
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黃守容 忠州大學校 1980 한국교통대학교 논문집 Vol.13 No.1
Class-D (switched-mode type) operation of RF amplifiers is characterized by sinusoidal current and pulse-type voltage waveforms at the output of the active circuit element. The theary behind its design being that the transistors can be operated close to 100 percent efficiency by switching ant an ultrasonic frequency. The effects of switching are filtered out to the program signal, have been research.
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PDM에 의한 Switching Regulator의 設計에 關한 硏究
黃守容 서울산업대학교 1982 논문집 Vol.17 No.1
This paper presents a design for a high degree of efficiency equipment using a method of pulse duration modulation Switching Regulator when the input of the Switching Regulator was impressed to 100[V], the results as follow. The output was regulated as a 5[V]and it was confirmed that a supperior regulated Voltage and efficiency was 95%.
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Bicoherence 분석에 의한 시각 유발 전위에 관한 연구
黃守容 서울産業大學校 1994 논문집 Vol.39 No.1
본 논문에서는 시각 유발전위에서 α와 β사이의 조화정도를 bicoherence로 분석하였으며, bicoherence 분석시, Fourier 방법보다 주파수 해상도가 좋은 AR 모델에 의한 방법으로 하였다. 시각 유발전위의 분석 결과를 배경뇌파와 비교한 결과, 시각 유발전위에서의 조화정도가 배경뇌파보다 낮게 나타났으며, 시각 유발전위에서는 배경뇌파와 달리 β파가 α파의 고조파 성질보다는 비고조파 성질이 많은 것이 확인되었다. In this paper the harmonic degrees between αwave and βwave in visual evoked potential are analyzed by the bicoherence. The bicoherence analysis is based on an AR model which provides significantly better resolution than of fourier transform. The analysis results of visual evoked potential are compared with the analysis results of background EEG. From the comparison results it is found that the harmonic degree of visual evoked potential is less than the harmonic degree of background EEG and the αwave βwave of visual evoke potential unlike the background EEG contains the nonharmonic property of αwave more than the harmonic property.
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Switching에 의한 同調增幅器의 設計에 關한 硏究
黃守容 忠州大學校 1981 한국교통대학교 논문집 Vol.14 No.1
This article Presents a survey of the design of tuned Switching Amplifier. Both non-Saturated and Saturated modes of Operation are Considered. The non-Saturate Amplifier is analysed for the two main collector waveforms and the results are shown to be comparable. Non-Saturated and Saturated (switched-mode) amplifiers are compared is efficiency, power output and harmonic content.
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황수용 서울産業大學校 1991 논문집 Vol.34 No.1
In this paper, an isolated word is recognized by the 3-state fuzzy inference of which recognition parameter is the linear prediction coefficient (LPC) obtained from the linear prediction analysis. Because every man has his own the mechanism of speech production and the pronounciation habit, the fuzzy inference which can overcome the problem due to the individual variation of the parameter is used in the isolated word recognition. The 3-state fuzzy inference is designed to overcome the disadvantage of the fuzzy inference. The 3-state fuzzy inference consists of LPC, frame and total frame of fuzzy inference. From the experimental results, the recognition ratio is 70[%] in case of male and female and 80[%] in case of male, at 6 cities. Therefore the 3-state fuzzy inference is considered as a good isolated word recognition method absorbing an individual variation.
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黃守容 서울産業大學校 1983 논문집 Vol.18 No.1
The digital filter use microprocessor, in which multiplication is conducted through two shift calculations and one summation or substraction. As a result, processing time was considerably shortened.
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Prony方法에 의한 背景 腦波 特徵 抽出에 관한 硏究
黃守容 서울産業大學校 1989 논문집 Vol.29 No.1
In this paper the feature of background EEG is extracted by Prony Method for the analysis of background EEG. Autocorrelation leg estimates are not required with the Prony method. The Prony method is required any the solution of two sets of simultaneous linear equation and a polynomial rooting. That the optimal order of this model is the 6-th order is determined by using Akaike's Information Criteria test. From the experimental results the alpha band amplitude is the largest among alpha band, beta band, theta band and delta band, and beta band amplitude is larger than that of the delta band and theta band. The sustained time for the alpha band, the beta band, the delta band and theta band is 2.3461 (sec), 0.6490 (sec), 0.3120 (sec), 0.7046 (sec) respectively. Consquently the alpha band is maintained in the whole subjects, the beta band, the delta band, the theta band are existed intermittently in each subjects.
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Piasarenko Harmonic Decomposition에 의한 배경 뇌파 파워 스펙트럼 분석에 관한 연구
황수용 서울産業大學校 1987 논문집 Vol.26 No.1
With the stochastic process which consists of the harmonic sinusoid and the white noise, the power spectrum of background EEG is estimated by the Pisarenko Harmonic Decomposition. The estimating results are examined and compared with the results from the maximum entropy spectral estimation, and the optimal order of this model can be determined from the eigen value's fluctuation of background EEG. From the comparing results, this paper ensures that this paper ensures that this method is possible to analyze the power spectrum of background EEG.
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MPU를 使用한 STEPMOTOR 位置制御에 關한 硏究
黃守容 서울産業大學校 1985 논문집 Vol.22 No.1
Study on the stepmotor control. With the advent of cheap computing power in the from of Microprocessors. This paper describes the use of the 280 to control the point-to-point motion of a stepmotor. The algorithm is developed to a point where is suitable for widespread practical application in the field of incremental motion control.
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黃守容 서울産業大學校 1986 논문집 Vol.24 No.1
In this paper the linear prediction is used on the spectral analysis of the EEG. The result from the AR model spectral analysis is compared with the result from the Fourier spectral analysis. The comparision shows that the spectra distributions are same.
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