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동영상 행동분석 검색을 위한 CNN-LSTM과 LRCN 모델 구현 및 성능 비교
유 광민,최 광미 조선대학교 IT연구소 2023 정보기술융합공학논문지 Vol.13 No.2
This paper compares the performance of CNN-LSTM and Long-Term Recurrent Convolutional Networks (LRCN) models, which combine CNN neural networks with excellent spatial characteristic extraction and LSTM neural networks specialized for processing and storing sequential time series data and adopt a model with better performance. As a result of implementing each model, the accuracy of CNN-LSTM was 91.7%, the accuracy of LRCN was 92.5%, and the video recognition result was 0.8% better. Video behavior analysis and search tests using the LRCN model were conducted 20 times to derive results with an accuracy of 84% or more. 본 논문은 동영상 행동 분석 및 검색을 위해 공간적 특성 추출이 탁월한 CNN 신경망과 순차적인 시계열 데이터를 처리하고 기억하는데 특화된 LSTM 신경망을 결합한 모델인 CNN-LSTM과 LRCN(Long-term Recurrent Convolutional Networks) 모델의 성능을 비교하고, 성능이 더 우수한 모델을 채택하여 구현하였다. 각 모델의 구현 결과 CNN-LSTM의 정확도는 91.7% LRCN의 정확도는 92.5%로, 동영상 인식 결과 0.8% 더 우수한 LRCN 모델을 채택하여 구현하였다. LRCN 모델을 적용한 동영상 행동 인식 테스트를 20회 실시하여 정확도 84% 이상의 결과를 도출하였다.
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구세광,이원화,광민,배종섭 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.6
Aspalathin (Asp) and nothofagin (Not) are twomajor active dihydrochalcones found in green rooibos tea(Aspalathus linearis; family, Fabaceae; tribe, Crotalarieae),which have been reported for their anti-oxidant activity. Here, the anticoagulant activities of Asp and Not wereexamined by monitoring activated partial thromboplastintime (aPTT), prothrombin time (PT), and the activities ofthrombin (Factor IIa, FIIa) and activated factor X (FXa). And, the effects of Asp and Not on expression of plasminogenactivator inhibitor type 1 (PAI-1) and tissue-typeplasminogen activator (t-PA) were evaluated in tumornecrosis factor (TNF)-a activated human umbilical veinendothelial cells (HUVECs). Treatment with Asp and Notresulted in prolonged aPTT and PT and inhibition of theactivities of thrombin and FXa, as well as inhibited productionof thrombin and FXa in HUVECs. In addition, Aspand Not inhibited thrombin-catalyzed fibrin polymerizationand platelet aggregation. Asp and Not also elicited anticoagulanteffects in mice. In addition, treatment with Aspand Not resulted in significant reduction of the PAI-1 tot-PA ratio. Collectively, Asp and Not possesses antithromboticactivities and offers a basis for development ofa novel anticoagulant.
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