• Title, Summary, Keyword: 파형분석

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ETRI신기술-ASADE S/W 기술

  • Electronics and Telecommunications Research Institute
    • Electronics and Telecommunications Trends
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    • v.14 no.3
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    • pp.123-124
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    • 1999
  • ASADE(ASIC Signal Analyzer Developed in ETRI)는 논리회로의 시뮬레이션 결과를 입력으로 받아서 그래픽 화면으로 논리파형으로 나타내고, 파형의 상호관계를 분석하기 위한 다양한 분석 기능들을 제공하는 파형분석용 CAD 툴이다. 파형분석은 설계 과정 중에서 수 없이 반복되는 작업이기 때문에 파형분석기의 성능이 설계기간 단축에 결정적인 영향을 미치게 된다. ASADE는 상용 파형분석기보다 GUI 환경, 처리속도, 분석 기능이 뛰어난 툴이다.

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Characteristics of the 13 December 1996 Yeongwol Earthquake Based on the Phase Analysis (파형분석에 의한 1996년 12월 13일 영월지진의 특성)

  • 김우한;지헌철;전명순;김성균
    • Journal of the Earthquake Engineering Society of Korea
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    • v.1 no.1
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    • pp.19-24
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    • 1997
  • The seismic of the main shock and two after shocks of the Yeongwol Earthquake are studied based on the phase analysis. The travel time curves and two point ray tracing with 12 different possible phases are used to analyze the phases of the records, which were provided by KIGAM seismic network. The results of phase analysis of the Yeongwol Earthquake show the characteristics as follows 1) The main shock ($M_s$=4.5) clearly shows Pn phase but two after shocks ($M_s$=3.8 and $M_s$=2.5) do not show Pn phase. 2) The Pg PmP looks as first arrival phase in the after shock records whose epicentral distance is smaller or larger than 145 km, 3). It is very difficult to identify the phases in the seismic records, which ae related to the Conrad discontinulty, even if the Conrad discontiulty exists. 4) The record of GRE station located outside of the Kyeongsan Basin shows different arrival time of Pn phase, P-S duration time and frequency comared with those of the other stations located within the Kyeongsan Basin.

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Analysis of Cab Signal Waveform Distortion Characteristics at ESJ of HSL (고속선 ESJ에서의 차상신호파형 왜곡특성 분석)

  • Lee, Tae-Hoon;Park, Ki-Bum;Yun, Cha-Jung;Seo, Jeng-Ho;Lee, Hae-Jae
    • Proceedings of the KIEE Conference
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    • pp.1165-1166
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    • 2007
  • 본 논문에서는 우리나라 고속선에서 사용 중인 UM71C 궤도회로의 ESJ(Electrical Separation Joint : 전기적 절연 구간)에서 정상 운행상태에서의 검측데이터 파형과 살수 및 수동살사의 요인에 따른 파형을 비교 및 분석하였다. 차상검측시스템에서 차상신호파형의 왜곡특성을 분석함으로써 지상과 차상간의 인터페이스 분석 및 열차의 안전운행을 확보하기 위한 기초자료로 사용될 수 있을 것이다.

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Development of fault wave analysis program for digital protection relay (디지털 보호계전기 사고파형 분석 프로그램 개발)

  • Park, Chang-Sun;Kim, Hyun-Sung;Cho, Pil-Sung
    • Proceedings of the KIEE Conference
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    • pp.513-514
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    • 2007
  • 최근 들어, 디지털 보호 계전기의 계측 및 계전 기능 외에 운용 프로그램 및 사고파형 분석 기능 또한 중요시 하고 있는 실정이다. 이를 위해 저장된 사고파형을 분석하기 위한 프로그램 개발이 요구되어 지고 있으며 본 논문에서는 다양한 기능을 가지는 사고파형 분석 프로그램을 소개한다.

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Spatiotemporal Analysis of Retinal Waveform using Independent Component Analysis in Normal and rd/rd Mouse (독립성분분석을 이용한 정상 마우스와 rd/rd 마우스 망막파형의 시공간적 분석)

  • Ye, Jang-Hee;Kim, Tae-Seong;Goo, Yong-Sook
    • Progress in Medical Physics
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    • v.18 no.1
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    • pp.20-26
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    • 2007
  • It is expected that synaptic construction and electrical characteristics In degenerate retina might be different from those In normal retina. Therefore, we analyzed the retinal waveform recorded with multielectrode array in normal and degenerate retina using principal component analysis (PCA) and Independent component analysis (ICA) and compared the results. PCA Is a well established method for retinal waveform while ICA has not tried for retinal waveform analysis. We programmed ICA toolbox for spatiotemporal analysis of retinal waveform. In normal mouse, the MEA spatial map shows a single hot spot perfectly matched with PCA-derived ON or OFF ganglion cell response. However In rd/rd mouse, the MEA spatial map shows numerous hot and cold spots whose underlying interactions and mechanisms need further Investigation for better understanding.

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On Overtopping Characteristics of Tsunami due to Waveforms (파형에 따른 지진해일의 월파특성에 관한 고찰)

  • Lee, Woo-Dong;Kim, Jung-Ouk;Park, Jong-Ryul;Hur, Dong-Soo
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.142-146
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    • 2017
  • 지진해일의 수리특성을 분석하기 위하여 유사한 파형특성을 가진 고립파를 많이 이용하고 있다. 그러나 고립파의 근사파형은 실제 지진해일에 비해 상당히 좁은 파형분포를 가지고 있다. 이에 수치모의에서는 기존의 고립파 근사식을 개량하여 고립파형의 지진해일을 수치적으로 생성하고 있다. 본 연구에서는 지진해일의 파형분포에 따른 월파특성을 수치적으로 조사하기 위하여 개량된 고립파 근사식을 2차원 N-S solver에서 적용하였다. 이것에 기초하여 수치파동수조에 직립호안과 그 배후에는 월파수조를 설치하고, 지진해일 월파량을 측정하였다. 수치해석결과로부터 직립호안 주변의 공간파형과 마루 위의 유속분포로부터 파형분포에 따른 월파현상을 분석할 수 있었다. 또한 기존 고립파 근사이론 대비 개량된 고립파의 체적비에 따른 월파량 변화를 정량적으로 조사하였다. 그 결과 지진해일의 체적비가 증가할수록 월파량이 거의 선형적으로 증가하는 경향을 나타내었다.

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On a Pitch Change of the Waveform Coding by the Cepstrum Analysis of Speech Waveforms (켑스트럼 분석에 의한 파형부호화의 피치변경에 관한 연구)

  • Bae, Myung-Jin;Lee, Mi-Suk
    • The Journal of the Acoustical Society of Korea
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    • v.11 no.4
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    • pp.14-21
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    • 1992
  • The waveform coding is concerned with simply preserving the wave shape of speech signal through a redundancy reduction process. In area of the speech synthesis, the waveform codings with high quality are mainly used to the synthesis by analysis. However, because the parameters of this coding are not classified as either excitation parameters and vocal tract parameters, it is difficult to applying the waveform coding to the synthesis by rule. In this paper, we proposed a new pitch alternation method that can change the pitch periods in the waveform coding by using the cepstrum analysis. Thus, it is possible that the waveform coding is carried out the synthesis by rule in speech processing.

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A Study on the Characteristics of Cooperating Charge considering Dominant Frequency (주 주파수를 고려한 협동장약 특성에 관한 연구)

  • Kim Jong-In;Kang Choo-Won
    • Tunnel and Underground Space
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    • v.15 no.4
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    • pp.316-323
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    • 2005
  • As a result of waveform analysis, the separation of waveform found that high frequency well accomplishes but low frequency doesn't accomplish that. The data which measured less than 60 Hz and more than 60 Hz was analysed to examine the relation between cooperating charge and frequency. The measured data of more than 70 Hz was also analysed to consider the characteristics of high frequency.

Analysis of Oscillometric Model based on Shape of Arterial Pressure (동맥압 형태를 고려한 오실로메트릭 모델분석)

  • 임성수;이경중
    • Journal of Biomedical Engineering Research
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    • v.21 no.4
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    • pp.411-417
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    • 2000
  • This paper describes the analysis of the oscillometric method based on the shape of arterial pressure and proposal of a new algorithm for estimating the blood pressure by computer simulation. In the first step, the arterial pressure model which is able to control the shape of arterial pressure was designed and then we simulated the oscillometric model using both the existing exponential model showing the static arterial pressure-volume relation and the designed arterial pressure model. By analyzing the correlation of characteristic ratio based on the shape of arterial pressure, we could find that the characteristic ratio was not the only standard parameter for estimating systolic and diastolic pressure. We were able to estimate the shape of arterial pressure by computing the correlation of arterial pressure shape with oscillation shape. Finally, we proposed an algorithm which is able to estimate systolic and diastolic pressure according to pressure(Pp) table constructed from the relation of maximum amplitude of oscillation and arterial pressure shape. We tested 60 arterial pressure waveforms having various arterial pressure shape and pulse. As a results, the absolute deviation average values of the estimation of systolic, diastolic and mean pressure were 1.62%, 2.40% and 2.20%, respectively. In conclusions, the proposed algorithm showed the possibility of usefullness in estimating the blood pressure.

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Analysis of SAR Processing Performances with FJB Waveforms (FJB 파형을 이용한 SAR 영상 생성 기법 분석)

  • Kim, Eun-Hee;Roh, Ji-Eun;Park, Joon-Yong;Kim, Soo-Bum
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.3
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    • pp.195-207
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    • 2017
  • Recently, the SAR-GMTI mode is becoming increasingly essential in airborne radar systems. While SAR requires wideband waveforms for high resolution imaging, GMTI requires narrowband waveforms for doppler processing, which makes general LFM waveforms difficult to use for SAR-GMTI. This paper analyses the FJB(Frequency Jump Burst) waveform, which is studied for the SAR-GMTI waveform, and presents the method for the pulse compression and SAR image formation using FJB waveforms. Simulation results show that there is little difference in performances between the FJB waveform and the LFM waveform.