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변형된 EM 알고리즘을 이용한 GMM 기반 문맥독립 화자식별 시스템의 성능향상
김성종,안종복,정익주 강원대학교 정보통신연구소 2005 정보통신논문지 Vol.9 No.-
In speaker identification systems, it was proved in previous other experimental theses that the performance of GMM is better than that of any other speaker modeling techniques. The EM algorithm is used to build a GMM-based speaker identification system. This paper introduces the modified EM algorithm to enhance the identification rate. The experiments examine algorithmic issues (initialization, variance limiting and model order selection). As a result of the experiments, the modified EM algorithm achieves 95.044% identification accuracy comparing with basic EM algorithm (94.605% identification accuracy) and is shown to outperform the basic EM algorithm.
임의 형상의 개수로에서의 복잡한 흐름에 대한 고정도 수치해석
윤종성,강인식,안성욱,강주복 釜山大學校生産技術硏究所 1996 生産技術硏究所論文集 Vol.50 No.-
본 연구의 목적은 일반곡선좌표계에서의 St. Venant 방정식을 MacCormack 차분법으로 처리한 2차원 부정류 모델을 개발함과 동시에 수리실험결과를 통해 흐름의 메카니즘을 파악하고 개발한 모델의 적합성 및 적용성을 검증한다. 본 수치모델이 상·살가 혼재하는 2차원 흐름을 잘 재현하고 있다고 생각되므로 본 수치모델은 낙차공동의 설치에 의한 급변 흐름의 유동을 표현하는데 유용할 것으로 생각된다. The purpose of this is to develop a numerical model of two-dimensional unsteady flow, which is composed of St. Venant equation on the general curve-linear coordinates by MacComack's scheme. First, this study comprehends the flow mechanism through the results of hydraulic experiments. Second, it verifies and feasibility of the present numerical model. The numerical model developed by this study regenerated well a coexisting sub-and super-critical two dimensional flow. Therefore, this model will be useful to express suddenly changed flow by hydraulic structures.
박창수,안종복 경주대학교 건설환경연구소 2002 建設環境論叢 Vol.- No.4
Unfortunately, it is very high the percent of the business vehicle(Bus, Taxi, Truck etc, that They should be the most safety), and it can be terrible the accidents with Bus or Truck. To be considered, vehicles that They are 5.1% of all registered vehicles cause 20.6% of all accidents and 16.7% of all death from car accidents, We will analyze the causes and present conditions of accidents with business vehicles, and make a solution for the problems that.
Ahn, Jong Bok,Jeong, Ok Ran 한국음성과학회 2003 음성과학 Vol.10 No.1
This study was conducted to determine changes of voice after consuming raw egg, apple, and pear. Ten college students vocalized /a/ before and after having raw egg, apple, and pear. Dr. Speech was utilized to obtain acoustic changes of subjects/ voice. At-test was performed to analyze changes of voice before and after consuming raw egg, apple, and pear. No significant difference was found in acoustic measurements before and after having the 3 food items. However, the subjects seemed to show some improvements in jitter, HNR, and NNE in the order of raw egg, apple and pear even though they did not reach a statistical significaance. It was concluded that a more systematic research paradigm was needed in order to objectively reject or substantiate the results of the current investigation.
아버지 양육참여에 대한 언어발달지연 자녀의 부·모간 인식 차이 연구
안종복(Jong Bok Ahn) 한국언어치료학회 2015 言語治療硏究 Vol.24 No.1
Purpose: This study aimed to investigate differences between fathers and mothers of children with language development delay about the fathers' parenting participation. Methods: Questionnaires were distributed and collected to discover differences in the said difference between fathers and mothers of children whose chronological age was 24-48 months, but language age was 12 months or less. Results: First, it was found that there was a significant cognition difference between the two groups concerning the fathers' participation related to communication with their children. Second, generally there was no significant cognition difference between the two groups concerning the fathers' participation related to play activities. Third, generally there was no significant cognition difference between the two groups concerning the fathers' participation related to understanding their children's language problems. Fourth, there was a significant cognition difference between the two groups concerning the fathers' participation related to daily life guidance. Lastly, generally there was no significant cognition difference between the two groups concerning the fathers' participation related to parenting attitude. Conclusions: It may be concluded that there was a significant cognition difference in some spheres between the two groups concerning the fathers' participation related to parenting children that have been delayed in language development and that fathers regarded themselves as more lenient concerning parenting their children.
안종복(Jong-Bok Ahn) 산업기술교육훈련학회 2011 산업기술연구논문지 (JITR) Vol.16 No.3
The flow meter detects the vortex made by the bluff body which is inside of the pipe that has flowing fluids and calculate the velocity of the fluid. The sensor was manufactured using sensor body and piezo ceramics as the result of the creative design in engineering. The preexistence was analyzed and considered manufacture process and experiment. The sensor body was made after modifying sensor housing and transmitter. Using an elastic tape, copper foil and electric wire, first experiment was conducted. After holding with a vise, impulse was given to the transmitter and signal was captured. Scale is the 100㎳/dev for horizontal direction, 100㎷/dev for vertical direction. And the signal of the preexistence and proto-type was similar with its amplitude and period. Also, through frequency analysis, piezo ceramics’ thickness was selected and it can reduce the cost and error from development step. The experiments include impulse and periodic impulse test.