• Title/Summary/Keyword: 기저선 변동 추정

Search Result 3, Processing Time 0.017 seconds

Minimizing Algorithm of Baseline Wander for ECG Signal using Morphology-pair (Morphology-pair를 이용한 심전도 신호의 기저선 변동 잡음 제거 알고리즘)

  • Kim, Sung-Wan;Kim, Se-Yun;Kim, Tae-Hun;Choi, Byung-Jae;Park, Kil-Houm
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.20 no.4
    • /
    • pp.574-579
    • /
    • 2010
  • The baseline wander is most fatal noise, because it obstructs reliable diagnosis of cardiac disorder. Thus, in this paper, the morphology-pair is proposed for estimation of baseline wander except P, T-wave and QRS-complex. Proposed Morphology-pair is able to except P, R, T-wave which have characteristics of local maxima. Likewise Q, S-wave such as local minima are excepted by proposed Morphology-pair. The final baseline wander eliminated ECG signal is deducted by subtraction of original ECG and estimated baseline wander. The experimental results based on the MIT/BIH database show that the proposed algorithms produce promising results.

Removing Baseline Drift in ECG Signal using Morphology-pair Operation and median value (Morphology-pair 연산과 중간 값을 이용한 심전도 신호의 기저선 변동 잡음 제거)

  • Park, Kil-Houm;Kim, Jeong-Hong
    • Journal of the Korea Society of Computer and Information
    • /
    • v.19 no.8
    • /
    • pp.107-117
    • /
    • 2014
  • This paper proposed the method of removing baseline drift by eliminating local maxima such as P, R, T-wave signal region and local minima Q, S-wave signal region. We applied morphology-pair operations improved from morphology operation to the ECG signal. To eliminate overshoot in the result of morphology-pair operation, we apply median value operation to the result of morphology-pair operation. We use MIT/BIH database to estimate the proposed algorithm. Experiment result show that proposed algorithm removing baseline drift effectively without orignal ECG signal distortion.

Multi-variable and Multi-site Calibration and Validation of SWAT for the Gap River Catchment (갑천유역을 대상으로 SWAT 모형의 다 변수 및 다 지점 검.보정)

  • Kim, Jeong-Kon;Son, Kyong-Ho;Noh, Jun-Woo;Jang, Chang-Lae;Ko, Ick-Hwan
    • Journal of Korea Water Resources Association
    • /
    • v.39 no.10 s.171
    • /
    • pp.867-880
    • /
    • 2006
  • Hydrological models with many parameters and complex model structures require a powerful and detailed model calibration/validation scheme. In this study, we proposed a multi-variable and multi-site calibration and validation framework for the Soil Water Assessment Tool (SWAT) model applied in the Gap-cheon catchment located downstream of the Geum river basin. The sensitivity analysis conducted before main calibration helped understand various hydrological processes and the characteristics of subcatchments by identifying sensitive parameters in the model. In addition, the model's parameters were estimated based on existing data prior to calibration in order to increase the validity of model. The Nash-Sutcliffe coefficients and correlation coefficient were used to estimate compare model output with the observed streamflow data: $R_{eff}\;and\;R^2$ ranged 0.41-0.84 and 0.5-0.86, respectively, at the Heuduck station. Model reproduced baseflow estimated using recursive digital filter except for 2-5% overestimation at the Sindae and Boksu stations. Model also reproduced the temporal variability and fluctuation magnitude of observed groundwater levels with $R^2$ of 0.71 except for certain periods. Therefore, it was concluded that the use of multi-variable and multi-site method provided high confidence for the structure and estimated parameter values of the model.