RBF 신경망을 이용한 화자적응에 관한 연구

우선경,강철호 광운대학교 신기술연구소 1997 신기술연구소논문집 Vol.26 No.-

본 논문에서는 Radial Basis Function(RBF) 신경망을 이용한 새로운 화자적응 방법을 제안한다. RBF 신경망은 구조적으로 은닉층과 출력층의 두 층으로 구성되어 있는 계층형 신경망으로서 지도학습으로 원하는 입출력간의 매핑을 한다. 은닉층 내의 각 노드는 입력패턴을 대표하는 중심점(center) 벡터들로 이루어지며 활성화 함수는 시그모이드 함수대신 지수함수로 대체된다. RBF 신경망의 초기 중심점 벡터들을 각각 기준화자의 단어로 구성하고 새로운 화자의 입력단어에 대해 중심점을 갱신함으로써 화자적응을 수행한다. 인식단어는 10개의 D. D. D 지역명을 사용하였고 기준화자를 포함한 화자 5명에 대해서 중심점을 갱신하는 경우와 갱신하지 않는 경우에 대해서 실험하였다. 시험화자의 경우 적응전의 평균 인식율 63.2%에 비해 중심점 갱신없이 출력층의 선형 가중치만 갱신한 경우는 15% 인식율이 향상되었으며 선형 가중치와 함께 중심점을 갱신한 경우는 26.3% 인식율이 향상되었다. In this paper, a new speaker adaptation method using RBF(Radial Basis Function) neural network is proposed. The RBF network is one of the layered neural networks which consist of hidden and output layer. Input-output mapping is provided by supervised learning. Each node in hidden layer includes a center vector which represents input patterns. The activation function of hidden layer substitutes exponential function for sigmoidal function. Initial centers of the RBF network are made of words or reference speaker and speaker adaptation is accomplished by updating centers of input words for new speakers. Ten D. D. D city names, uttered by five speakers including one reference speaker, are used to carry out the speech recognition experiments both with center update and without center update. For test speakers, the recognition rate of 15% is improved by only adjusting linear weights and 26.3% improved by updating both linear weights and center vectors compared with the average one of 63.2% before adaptation.

특징 거리와 방향성을 이용한 필기체 수식 인식

강경완,이우선,정성환 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

We propose the recognition method of hand written numerical formula using the feature distance and the directionality. The proposed method uses the real time concept that is characteristic of on-line hand written character recognition. First, it receives the pixel coordinates of a numerical formula from a tablet. Secondly, it achieves the separation process on the inputed formula. Thirdly, it supplies sequentially one completed mathematical formula unconcerned with notes order. Finally, using the pattern conformity of feature distance and directionality, we recognize a completed mathematical formula. In the experiment using 100 mathematical formulas, the proposed method showed the recognition rate of about 98%

敎養課程으로서의 「人口와 未來」開設 및 運營에 관한 實驗硏究 : 梨花女子大學校를 中心으로

康宇哲,徐洸善,田贊和,金在恩,蘇興烈 이화여자대학교 한국문화연구원 1979 韓國文化硏究院 論叢 Vol.33 No.-

This is a research report of the research that led to the opening of a population education course at Ewha Womans University. The research itself may be divided into the following four parts: planning for the research ; preparatory work for a population education course; opening of a population course; and evaluation of the population course. In the first stage of the research, the work, as usual, consisted of organizing the research team, setting up the research objectives, planning the research schedule, etc. The project began in the Fall of 1974, and concluded in the Fall of 1978. In the second stage of the research, the work was carried out for the preparation of a course in population education. Several sessions of faculty conference, in which more than 40 professors from various fields of specialization participated, were held in order to determine the specific objectives of the proposed course, to draw up a syllabus, and to prepare for a textbook for the course. When a rough sketch of the syllabus, and the contents of the course was made a student group was organized to examine and evaluate it. In the third stage of the research, a population education course titled "Population and Future" was opened as an elective course in the general education curriculum. This was in the Fall of 1875, and the course remained open every semester until now. An anthology with the same title as the course itself was used for reading, and the teaching was carried out as a team teaching by a team of 6-9 professors. In the fourth stage of the research, an evaluative study was taken up in order to evaluate the course with regard to its structure, textbook, teaching method, and its contents, as well as to assess the effectiveness of the course on terms of the students' change in their cognitive and emotive or attitudinal response to population problem.

LPF와 반복삽입을 이용한 효율적인 오디오 워터마크 추출

강혜원,이우선,정성환 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

We propose a method to decrease greatly the of original signal and improve efficiency in extraction process by modifying the existent audio watermarking extraction process. In the extraction process, we improve the efficiency of watermark extraction through repeated insertion of watermark and usage of a simple low frequency filter to remove a signal similar to an original signal as a preprocessing. As the result of experiment using some actuality audio data, we get watermark detection rate improvement of about 79%.

Aerobic Dance가 主婦의 體力 및 身體構成에 미치는 效果에 대한 硏究

禹善弼,姜東洹 慶熙大學校 體育科學大學 1990 體育科學論叢 Vol.- No.3

The purpose of this study was to see the change of pulmonary function, physical fitness, physique and Body Composition affected by Aerobic movement during 10 weeks. The study was conducted by observing. The following results were concluded the home-keepers who were in their 30s. 1. Body weight, Waist Girth, and Thigh Girth of physique were decreased, and Chest Girth and upper Arm Girth were increased. 2. Skinfold Thickness of Body Composition was totaly decreased, but Lean Body and mass was increased. 3. Book strength and Trunk Flextion were improved better than before, and the height of sargent Jump and the Number of side step were decreased. 4. Average and total Lung Function were decreased after the training compared to before exercise. According to the results of this research, Aerobic exercise has a little effect on weight reduction and physical fitness improvement, but has no effect on Lung function. Also, although strength and Flexibility has been improved as a result of the Aerobic movement, some aspects of power and Agility have not been improved. As a conclusion, although Aerobic exercise can not improve general fitness of the homekeeper but maintain previous fitness level and body shape.

대칭형 접합이음 보강판의 피로균열성장거동

이환우,강선규 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-

보강판은 항공기 구조물의 대부분을 점유하고 있으며, 현실적으로 매우 중요한 균열문제중의 하나이다. 본 연구에서는 복합재료 보강재가 접합된 보강판의 응력확대계수와 피로균열성장거동을 실험ㆍ평가하였으며 그결과를 균열성장과 피로수명의 관계로 정리하여 보강판의 형상비 조건과 보강재의 재질 및 강성비의 영향등을 비교 ㆍ고찰하였다. The stiffened panel is representative of a large portion of aircraft construction and therefore has much practical importance. In this paper, the influence of various shape parameters on the stress intensity factors and the fatigue crack growth in the panels with bonded composite stiffeners are studied experimentally. Results are presented as Crack Growth Rates for various values of crack lengths, stiffening ratios, and stiffening Materials.

주사선 전자현미경을 이용한 집적회로 공정기술의 응용

朴善宇,姜順鍾,金鐵柱 서울市立大學 1990 論文集 Vol.24 No.-

As to increase of density in integrated circuit(IC), Electron Beam(EB) lithography method is much anticipated to improvement of IC process lithography technology. we tried this method is carried out by Scanning Electron Microscops(SEM) that is originally reseble with EB main lithography equipment in IC process. This execution contains an interface hardware organization and a new lithography algorithm using IBM PC. Experiment results obtained fine pattern in minimum design rule 10um. This results will be contributed in high through-put and low cost IC Process.

Langmuir-Blodgett법에 의한 지질단분자막(DPPC)의 전기적 특성

이우선,강용철 조선대학교 생산기술연구소 1996 生産技術硏究 Vol.18 No.2

Langmuir-Blodgett(LB) method is known as a unique method for preparing organic thin films. which can control thickness of the films in molecular level, and many kinds of ultra thin films of functional molecules have been prepared using this method. In this study. the organization of phospholipid monolavers on a water surface was investigated by means of displacement current measurement technique. Finally, we measured the differential thermal analysis (DTA) of sample. The result of DTA was acquired at 124.6℃

Ceftazidime의 임상적 연구 : 과립구 감소환자에서의 감염증에서 Piperacillin-Tobramycin 병합요법과의 비교연구 Ceftazidime or Piperacillin plus Tobramycin and the Possible Modifications Required for a Successful Outcome

최강원,배현주,김양수,김성민,박선양,김병국,김노경,우준희 대한화학요법학회 1990 대한화학요법학회지 Vol.8 No.1

In a randomized, prospective study, ceftazidime monotherapy was compared with a combination of piperacillin and tobramycin for the treatment of infection in febrile granulocyto penic cancer patients. The subjects consisted of 40 patients with acute leukemia or solid tumor who developed fever and other signs of infections after induction chemotherapy or bone marrow transplantation. 21 patients were randomized to the piperacillin plus tobramycin combination, while 19 patients were allocated to ceftazidime monotherapy. Initial granulocyte count, duratation of granulocytopenia, infection days and granulocyte count on therapeutic responsewere all comparable in both treatment groups. On 72 hour assessment, success (with or with-out modification) rate according to NCI criteria was 100% in ceftazidime and 95% in combination group. Success according to EORTC criteria was 26% and 48% respectively. On posttreatment assessment, success rate according to MCI criteria was 91% in ceftazidime group and 70% in combination group, while one according to EORTC was 33% and 40% respectively. There was no statistical significance between the two success rates. The superinfection was more commonly seen in the combination group, esp. by resistant E. coli, even though the difference was not significant.

이염화이소시아뉼산나트륨 제재의 근관세척액 사용 가능성 평가 : 염소이온농도, 세포독성, 항균성 및 pH

이우철,강봉선,김철호,손호현 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.5

The purpose of this study was to evaluate the clinical applications of the Sodium Dichloroisocyanurate effervescent tablet as a routine root canal irrigant by performing several in vitro tests such as CI content. cytotoxicity. antimicrobial effect as well as its pH level compared to the equivalent concentration of sodium hypochlorite solution. 1. Sodium Dichloroisocyanurate demonstrated lower level of CI concentration than each dilution of sodium hypochlorite solution. Both solution has increased level of CI as the concentration of each solution increased. There was no significant change of CI concentration in sodium hypochlorite as time goes by. However. CI concentration in Sodium Dichloroisocyanurate was increased. 2. The antimicrobial effects of both solutions were increased when their concentrations were increased. One day after dilution. antimicrobial effect of Sodium Dichloroisocyanurate was slightly higher than sodium hypochlorite. however. there was no difference in 1 week dilution solution. One month dilution solution of sodium hypochlorite still retain its activity. but antimicrobial effect of Sodium Dichloroisocyanurate was drastically decreased 1 month after dilution. 3. The cytotoxicity of Sodium Dichloroisocyanurate was rather higher than same concentration of sodium hypochlorite solution until 1 week after dilution. Then in 1 month. cytotoxicity of Sodium Dichloroisocyanurate was decreased than that of 1 week dilution solution. especially 4% Sodium Dichloroisocyanurate solution has almost no toxicity. However. 1% and 2% sodium hypochlorite solution has unchanged moderate degree of cytotoxicity after the dilution. Furthermore. 4% sodium hypochlorite solution showed high level of toxicity. 4. The pH level of Sodium Dichloroisocyanurate showed that the solution was weak acid (pH5). On the other hand. sodium hypochlorite was revealed as a strong alkaline solution (pH12). There was no change in pH following the dilution of each solution. As results. Sodium Dichloroisocyanurate solution fully satisfy the basic requirements as a root canal irrigation solution. However. we strongly recommend to use this solution clinically in low concentration and try to apply into the root canal within 1 week after dilution.