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신경망을 이용한 DNA칩 영상 패턴 분류 알고리즘 (Pattern Classification Algorithm of DNA Chip Image using ANN)

  • 주종태;김대욱;심귀보
    • 한국지능시스템학회논문지
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    • 제16권5호
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    • pp.556-561
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    • 2006
  • DNA칩 영상의 패턴 분류는 인간의 유전적 질병에 대한 유용한 정보를 획득할 수 있다는 점에서 아주 중요한 것이다. 본 논문에서는 DNA칩 영상의 패턴을 분류하기 위해 신경망의 학습 알고리즘 중 Back-propagation과 Self Organizing Map을 이용하여 패턴을 분류하는 알고리즘을 개발하고 이들의 결과를 비교 분석하였다. 또한 개발한 알고리즘은 PC 환경 및 S3C2440 (ARM920T)을 CPU Core로 사용한 MV2440 보드에서 실험하여 그 결과를 디스플레이 함으로써 사용자가 다양한 환경에서 보다 쉽게 유전자 정보를 얻는데 도움을 줄 수 있도록 하였다.

공동주택 거주자의 공유공간 인식에 대한 조사 연구 (A Study on the Resident Recognition of Common Space in Apartment)

  • 한민승;황희준
    • 대한건축학회논문집:계획계
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    • 제35권4호
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    • pp.45-52
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    • 2019
  • The most ordinary form of residential type in Korea is a plate-type apartment, and the common space in these apartment is attracting as an important factor for enhancing social exchanges among neighbors and forming community consciousness. In addition, it provides a sense of psychological security by enabling natural exchanges and communication in contemporary society. It is desirable to plan the flow of space in such a way that private, semi-private, semi-public, and public spaces are linked. Semi-private and semi-public spaces can be defined as common spaces. Semi-private spaces are strongly recognized in the order of unit household entrance, main entrance, elevator, corridor, staircase, playground, bench, trail, walkway and parking lot, exercise space, main/back gate, the ability to gratify is increased sense of belonging, ownership consciousness formation, defensive function. Semi-public space is strongly recognized in the order of playground, bench, exercise space, trail, main entrance, walkway and parking lot, unit household entrance, main/back gate, corridor, staircase, elevator, the ability to gratify is increase of social contact, Secondary activity space function. In addition, the function to gratify in the common space differs according to gender and age group among resident characteristics, and differs according to corridor type, parking lot type and main entrance type. Therefore, differentiated planning of common space is needed in consideration of these differences in the design of common space in future.

외란 관측기 기반의 이산시간 전동기 추종제어 (Discrete Time Tracking Control of Motor Based on Disturbance Observer)

  • 전용호;강정욱
    • 한국전자통신학회논문지
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    • 제16권3호
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    • pp.511-518
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    • 2021
  • 전동기의 좋은 추종 성능을 얻기 위해서는 외란 관측기가 포함되어 외란에 대응할 수 있는 제어기를 설계하는 것이 필요하다. 전동기의 외란 관측기는 1차 저역통과 필터를 기반으로 부하 토크과 역기전압을 추정하도록 설계하였다. 외란 관측기와 제어기의 상호관계를 비교하고, 개선된 제어 성능을 얻기 위하여 PI 제어기와 IP 제어기를 설계하였다. 설계된 관측기와 제어기의 성능을 확인하고자 120 [W]급의 BLDC 전동기에 적용하였다. 그 결과 오버슈트가 줄어들며, 정상상태 오차가 영으로 수렴하는 것을 확인할 수 있다.

Machine learning in concrete's strength prediction

  • Al-Gburi, Saddam N.A.;Akpinar, Pinar;Helwan, Abdulkader
    • Computers and Concrete
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    • 제29권 6호
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    • pp.433-444
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    • 2022
  • Concrete's compressive strength is widely studied in order to understand many qualities and the grade of the concrete mixture. Conventional civil engineering tests involve time and resources consuming laboratory operations which results in the deterioration of concrete samples. Proposing efficient non-destructive models for the prediction of concrete compressive strength will certainly yield advancements in concrete studies. In this study, the efficiency of using radial basis function neural network (RBFNN) which is not common in this field, is studied for the concrete compressive strength prediction. Complementary studies with back propagation neural network (BPNN), which is commonly used in this field, have also been carried out in order to verify the efficiency of RBFNN for compressive strength prediction. A total of 13 input parameters, including novel ones such as cement's and fly ash's compositional information, have been employed in the prediction models with RBFNN and BPNN since all these parameters are known to influence concrete strength. Three different train: test ratios were tested with both models, while different hidden neurons, epochs, and spread values were introduced to determine the optimum parameters for yielding the best prediction results. Prediction results obtained by RBFNN are observed to yield satisfactory high correlation coefficients and satisfactory low mean square error values when compared to the results in the previous studies, indicating the efficiency of the proposed model.

LMS PHD에 의한 배경단파 파워 스펙트럼 추정 (Power Spectral Estimation of Background EEG with LMS PHD)

  • 정명진;최갑석
    • 대한의용생체공학회:의공학회지
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    • 제9권1호
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    • pp.101-108
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    • 1988
  • In this paper the power spectrum of background EEG is estimated by the LMS PHD based on least mean square. At the power spectrum estimatiom, the stocastic process of background EEG is assumed to consist of the nonharmonic sinusoid and the white noise. In the LMS PHD the model parameters are obtained by the least mean square at optimal order which is obtained from the fact that the eigenvalue's fluctuation of autocorrelation matrix of the normal back-ground EEG is smaller at some order than at other order when the power spectrum of background EEG is esitmated by PHD. The optimal order of this model is the 6-th order when the eigenvalue's fluctuation of autocorrelation matrix of background EEG is considered. The estimation results are with compared the results from the Maximum Entropy Spectral Estimation and Pisarenko Harmonic Decomposition. From the comparison results. The LMS PHD is possible to estimate the power spectrum of background EEG.

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The Beginnings of the Sudhamma Buddhist Order of Monks

  • Naing, Shwe Zin Hpon
    • 수완나부미
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    • 제4권2호
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    • pp.33-49
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    • 2012
  • This article uncovers the beginning of the Sudhamma Buddhist order tracing its background history. After ascending the throne, being interested in trying to bring back Buddhism to its ancient strength and prosperity, King Mindon paid fully attention in all the religious affairs like King Asoka. Therefore, the different Sangha associations had emerged in his time. It had grown wider and wider and that brought about many adverse effects. During the time of King Thibaw, to reorganize the Sangha associations, he appointed two Supreme Leaders; one for Sudhamma and one for the Rhwekyan Buddhist Order of Monks. Thus the rise of the term of Sudhamma Buddhist Order of Monks became the most popular among the Theravada Buddhist monks. This article, tracing its history, will answer the question that what about any difference between the Sudhamma Buddhist Order and others especially?

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급성(急性) 요부(腰部) 염좌(捻挫) 환자 30례(例)의 두부(頭部) 독맥경(督脈經), 족태양방광경(足太陽膀胱經) 경혈(經穴) 도마침법(倒馬鍼法) 치료효능에 대한 임상적(臨床的) 고찰(考察) (Therapeutic Effect of 30 Cases of Scalp and Do-ma Acupuncture Related with Governor Vessel(Dok) and Bladder Meridian(Chok-taeyang) on Acute Low Back Pain)

  • 강민완;김성래;최가원;송형근;김정호;양기영;임윤경;홍권의;이현;김영일
    • Journal of Acupuncture Research
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    • 제23권3호
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    • pp.207-214
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    • 2006
  • Objectives : This study is designed in order to evaluate the therapeutic effect of Scalp Acupuncture and Do-ma Acupuncture related with Governer Vessel(Dok) and Bladder Meridian(Chok-taeyang) on acute low back pain Methods : We investigated 30 patients suffering from acute low back pain were admitted to Dunsan O.M.hospital from March. 1st 2005 to December. 30th 2005. We divided into two groups: one group was treated with Scalp acupunture, another group was treated with common acupuncture. 30 patients, were diagnosed only straightened curvature on lateral view of lumbar spine X -ray. Scalp acupunture related with Governer Vessel(Dok) and Bladder Meridian(Chok-taeyang) and Do-ma acupuncture. To estimate the efficacy of treatment that applied for two groups, we compared the visual analog scale(VAS), Oswestry disabiliby index(ODI) and Straight Leg Raising Test(SLRT) score of two groups statistically. Results : Both Scalp acupuncture related with Governer Vessel(Dok) and Bladder Meridian (Chok-taeyang) and Do-ma acupuncture therapy showed good effect on acute low back pain. It was proved by the difference between VAS, ODI and SLRT score checked before treatment and what checked after treatment on each groups. Conclusion: The therapeutic effect of Scalp Acupuncture and Do-ma Acupuncture on acute low back pain can be recommended as a useful therapy to treat acute low back pain.

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Thermal Analysis of the Natural Convection Cooling Type Transformer

  • Oh Yeon-Ho;Song Ki-Dong;Sun Jong-Ho
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • 제5B권2호
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    • pp.142-145
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    • 2005
  • The life expectancy of a transformer largely depends on the temperature-rise it experiences. If the temperature-rise exceeds limits specified in the design standards, the aging of insulating materials is accelerated and the capability of the cooling medium is deteriorated. Consequently, applicable limits for the temperature-rise are essential in designing the transformer and the coolers, demanding the estimation of the transformer's thermal behavior. In order to analyze the temperature characteristics of the transformer, numerical analysis by way of the commercial CFD code has been carried out, and temperature-rise testing to verify computed results was performed. The results obtained in this study show that there is a good agreement between computed outcomes and experimental outcomes.

배수재가 설치된 압축성 지반의 효율적인 압밀해석 및 역해석 (Practical Consolidation Analysis and Back Analysis for Draainage-Installed Compressible Deposits)

  • 김윤태;이승래
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 1994년도 가을 학술발표회 논문집
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    • pp.175-181
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    • 1994
  • In order to accelerate the rate of consolidation settlement and to gain a required shear strength for a given soft clay deposit, the preloading technique combined with a vertical drainage system has been widely applied. In this study, the theory of axisymmetric concolidation, which considers the variation of compressibility and permeability during the consolidation process, has been developed. Smear and well resistance effects are also considered. Furthermore, several back-analysis schemes such as simplex method, BFGS method, and ADS have been adopted in the axisymmetric consolidation program(AXICON). The measured data in the first stage of consolidation are utilized to predict the subsequent consolidation behavior.

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매입형 영구자석 동기전동기를 위한 새로운 전동기 상수 추정 방법 (A Novel Parameter Estimation Algorithm for Interior Permanent-Magnet Synchronous Motors)

  • 임동찬;이동명
    • 전력전자학회논문지
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    • 제18권3호
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    • pp.289-295
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    • 2013
  • It is important to know exact values of Interior Permanent Magnet Synchronous Motors(IPMSM)' parameters such as stator resistance and inductance in order to have their high performance. This paper proposes a novel motor parameter(stator resistance, d&q axis inductance) estimation algorithm for IPMSM. The proposed estimation method utilizes back-EMF equations and model reference adaptive system(MRAS). The algorithm using back-EMF estimates d and q axis inductances in the constant torque region, and the stator resistance is estimated by using MRAS with the estimated inductance regardless of speed regions. The validity of the proposed algorithm is verified by simulations and experiments.