• 제목/요약/키워드: Computer experiments

검색결과 3,932건 처리시간 0.031초

Evaluating Chest Abnormalities Detection: YOLOv7 and Detection Transformer with CycleGAN Data Augmentation

  • Yoshua Kaleb Purwanto;Suk-Ho Lee;Dae-Ki Kang
    • International journal of advanced smart convergence
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    • 제13권2호
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    • pp.195-204
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    • 2024
  • In this paper, we investigate the comparative performance of two leading object detection architectures, YOLOv7 and Detection Transformer (DETR), across varying levels of data augmentation using CycleGAN. Our experiments focus on chest scan images within the context of biomedical informatics, specifically targeting the detection of abnormalities. The study reveals that YOLOv7 consistently outperforms DETR across all levels of augmented data, maintaining better performance even with 75% augmented data. Additionally, YOLOv7 demonstrates significantly faster convergence, requiring approximately 30 epochs compared to DETR's 300 epochs. These findings underscore the superiority of YOLOv7 for object detection tasks, especially in scenarios with limited data and when rapid convergence is essential. Our results provide valuable insights for researchers and practitioners in the field of computer vision, highlighting the effectiveness of YOLOv7 and the importance of data augmentation in improving model performance and efficiency.

On the Computerization of Minimizing the Switching Function by the MASK Method

  • Cho, Dong-Sub;Hwang, Hee-Yeung
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1979년도 하계 전자.전기연합학술발표회논문집
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    • pp.69-72
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    • 1979
  • This paper deals with the computer method of finding the minimal sum of products for a switching function by using the MASK method derived from the characteristics of the Boolean algebra. The experiments with the program which is dissimilar to the previous computer programs show that the algorithm presented will be more efficient.

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자동제어 장치와 컴퓨터 프로그램을 이용한 수차 성능 실험 (Performance Experiments of Waterwheel using the Automatic Control Devices and the Program)

  • 이경호
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2013년도 제47차 동계학술대회논문집 21권1호
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    • pp.107-110
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    • 2013
  • 본 논문에서는 좁은 수로에서의 3단계의 기울기와 2단계의 유량에서 수차의 흘수와 효율에 관한 실험을 수행하였다. 컴퓨터에 의하여 제어되는 자동화된 축소 실험 환경을 구성하고, 3단계의 기울기와 2단계의 유량 각각에 대하여 10단계의 흘수별 회전효율 데이터를 취득하고, 취득한 데이터를 이용하여 회전 효율을 분석하고, 전에 실험한 다른 논문의 결과와 비교하여 잘못된 결과들을 찾아내고, 유사하게 현상들의 동일함을 확인하며, 수작업 실험에서 밝혀내지 못한 현상들을 추가하여, 컴퓨터의 이용효과를 확인하였다.

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SEQUENTIAL EM LEARNING FOR SUBSPACE ANALYSIS

  • Park, Seungjin
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2002년도 ITC-CSCC -1
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    • pp.698-701
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    • 2002
  • Subspace analysis (which includes PCA) seeks for feature subspace (which corresponds to the eigenspace), given multivariate input data and has been widely used in computer vision and pattern recognition. Typically data space belongs to very high dimension, but only a few principal components need to be extracted. In this paper I present a fast sequential algorithm for subspace analysis or tracking. Useful behavior of the algorithm is confirmed by numerical experiments.

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An Efficient Implementation of Tornado Code for Fault Tolerance

  • Lei, Jian-Jun;Kwon, Gu-In
    • 한국공간정보시스템학회 논문지
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    • 제11권2호
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    • pp.13-18
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    • 2009
  • This paper presents the implementation procedure of encoding and decoding algorithms for Tornado code that can provide fault tolerance for storage and transmission system. The degree distribution satisfying heavy tail distribution is produced. Based on this distribution, a good random irregular bipartite graph is attained after plenty of trails. Such graph construction is proved to be efficient, and the experiments also demonstrate that the implementation obtains good performance in terms of decoding overhead.

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시뮬레이션 기법을 이용한 컨테이너 터미날의 운영시스템 결정 (Determination of Container Terminal Operating System Using Computer Simulation)

  • 장성용;박진우
    • 산업공학
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    • 제1권1호
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    • pp.49-62
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    • 1988
  • This paper deals with the case study that determines the best operating system of a container terminal using computer simulation techniques. For the simulation, SIMAN simulation language is used. The simulation model developed circumvents the dimensional restrictions imposed by the SIMAN package. Non-terminating simulation experiments are conducted for the 90 days' work on the basis of operation practices of real terminals.

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Collection of Korean Audio-video Speech Data

  • Jo, Cheol-Woo;Goecke, Roland;Millar, Bruce
    • 음성과학
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    • 제7권1호
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    • pp.5-15
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    • 2000
  • In this paper a detailed description of collecting Korean audio-video speech data is presented. The main aim of this experiment is to collect some audio-video materials which can be used for later experiments to estimate and model the actions of the visible human articulatory organs such as mouth, lips and jaw. We collect audio-video data from seven directions separately. Twelve markers are used to trace the movements.

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Modeling of the Centerless Through-feed Grinding Process

  • Kim, Kang
    • Journal of Mechanical Science and Technology
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    • 제17권7호
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    • pp.1036-1043
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    • 2003
  • A computer simulation method for investigating the form generation mechanism in the centerless through-feed grinding process is described. The length of the contact line and the magnitude of the grinding force between the grinding wheel and workpieces, vary with the change in the axial location of the current workpiece during grinding. Thus, a new coordinate system and a grinding force curve of previous and/or following workpieces are introduced to treat the axial motion. Experiments and computer simulations were carried out using four types of cylindrical workpiece shapes. To validate this model, simulation results are compared with the experimental results.

대형 액체 이젝터의 성능특성에 관한 연구 (A Study on the Performance Characteristics of the Large Liquid Ejector)

  • 김경석;이종수;김경근;김원녕
    • Journal of Advanced Marine Engineering and Technology
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    • 제14권1호
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    • pp.90-98
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    • 1990
  • The liquid ejector, having no moving, lubricating and leaking parts, is widely used as the various pumps because of its high working confidence and simplicity. Previously, computer aided design program for the small-sized liquid ejector was developed based on the one-dimensional flow analysis and the systematical laboratory level experiments. Through the present research, it is confirmed that the previously developed computer program to getermine the main design dimensions and to calculate the expected performance curve is satisfactorily applied to design the large liquid ejectors.

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Simulation of Moire Effect in 3D Displays

  • Saveljev, Vladimir;Kim, Sung-Kyu
    • Journal of the Optical Society of Korea
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    • 제14권4호
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    • pp.310-315
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    • 2010
  • Theoretical and experimental investigations of moires in 3D displays were performed. To describe and minimize moires, we propose the polar representation form of moire waves. The experimental and theoretical data are in good agreement except in the neighborhood of the minimization angle. The implicit formulas are found for visible moires of line gratings at finite distances. The computer simulation and the physical experiments confirm the moire appearance for this case.