• 제목/요약/키워드: HAI

검색결과 2,667건 처리시간 0.028초

盆唐 新市街地 開發에 따른 周邊地域 野鼠類의 生態 (Population dymamics of apodemus agrarius inhabiting in the vicinity of new urbanizing at pundang area)

  • Lee, Hai-Poong;Sang-Hun Kim;Meung-Hai Kim;Chong-Ⅱ Lee
    • The Korean Journal of Ecology
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    • 제15권2호
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    • pp.201-208
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    • 1992
  • Wild rats inhabiting pundang area where urbanized since 1989 were there species including apodemus agrarius. amoung them, a. agrarius was dominant as shown in other areas of korea. They were captured much more 85.00$\pm$9.46 per ha., 64.40$\pm$7.50 per ha. respectively in may and August than inother seasons all through the year. The proportion of female and male was in the ratio of 2 to 1 regardless of the season and habitat, and this species was inhabiting more at oak forest community in summer and at hill-upland boundary in winter than at other habitats in the same season. The change of environment by new urbanizing did not affect in density of wild rats. In general, seasonal percentage of capture in different habitats inceased in accordance with high density.

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HAI 제어를 이용한 IPMSM의 속도 추정 및 제어 (Speed Estimation and Control of IPMSM using HAI Control)

  • 이정철;이홍균;이영실;남수명;정동화
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.176-178
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    • 2004
  • Precise control of interior permanent magnet synchronous motor(IPMSM) over wide speed range is an engineering challenge. This paper considers the design and implementation of novel technique of speed estimation and control for IPMSM using hybrid intelligent control. The hybrid combination of neural network and adaptive fuzzy control will produce a powerful representation flexibility and numerical processing capability. Also, this paper is proposed speed control of IPMSM using adaptive neural network fuzzy(A-NNF) and estimation of speed using artificial neural network(ANN) controller. The back propagation neural network technique is used to provide a real time adaptive estimation of the motor speed.

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A Coupled Recursive Total Least Squares-Based Online Parameter Estimation for PMSM

  • Wang, Yangding;Xu, Shen;Huang, Hai;Guo, Yiping;Jin, Hai
    • Journal of Electrical Engineering and Technology
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    • 제13권6호
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    • pp.2344-2353
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    • 2018
  • A coupled recursive total least squares (CRTLS) algorithm is proposed for parameter estimation of permanent magnet synchronous machines (PMSMs). TLS considers the errors of both input variables and output ones, and thus achieves more accurate estimates than standard least squares method does. The proposed algorithm consists of two recursive total least squares (RTLS) algorithms for the d-axis subsystem and q-axis subsystem respectively. The incremental singular value decomposition (SVD) for the RTLS obtained by an approximate calculation with less computation. The performance of the CRTLS is demonstrated by simulation and experimental results.

가주성 쥐에 기생하는 Trombiculid Mites의 발생 소장 (The Seasonal Variation of Abundance of Trombiculid Mites Parasitizing on the House Rats)

  • Kim, Meung Hai;Hai-Poon Lee;Wan-Ho Chung
    • The Korean Journal of Ecology
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    • 제10권1호
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    • pp.17-22
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    • 1987
  • This survey was carried out in four areas in southern Korea from May 1983 through April 1986. A total of 1, 717 house rats was caught by trapping technique throughout the 4 areas. The total of 1, 535 trombiculid mites (4 genera, 7 species) was found only among Rattus norvegicus. Six species were observed in Seoul and Yangsuri areas, and 5 species in Seongnam area. No trombiculid mites were found in the rats caught in Inchon area. The highest infection rate of trombiculid mites (25%) was recorded in the rats caught in Seongnam area. And Leptotrombidium palpale was abundant species in general (detection rate; 72.8%) In seasonal variation, the hightes number of trombiculid population was observed from October through December in all the areas surveyed, and especially Euschongastia koreaensis apperaed more in autumn and winter than in any other season. The values of specie diversity and evenness of trombiculid mites found in Yangsuri were comparatively higher than those from the other areas.

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A Study On The Improvement Of Freight Transportation In Hai Phong city

  • Do, Hoang Chien;Yoon, Dae-Gwun;Keum, Chong-Su
    • 해양환경안전학회:학술대회논문집
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    • 해양환경안전학회 2017년도 추계학술발표회
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    • pp.98-99
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    • 2017
  • With special condition in the geography, maritime industry is improvement rapidly in the planet, which is covered by approximately $360,000,000km^2$ of Saline water. Together with the development of this field, freight transportation industry becomes one of the most important service in the world as well as in Hai Phong. Meanwhile the number of company and quality of service increased due to the demanding of citizen, the price for this activities also raised.

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HYBRID INERTIAL CONTRACTION PROJECTION METHODS EXTENDED TO VARIATIONAL INEQUALITY PROBLEMS

  • Truong, N.D.;Kim, J.K.;Anh, T.H.H.
    • Nonlinear Functional Analysis and Applications
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    • 제27권1호
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    • pp.203-221
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    • 2022
  • In this paper, we introduce new hybrid inertial contraction projection algorithms for solving variational inequality problems over the intersection of the fixed point sets of demicontractive mappings in a real Hilbert space. The proposed algorithms are based on the hybrid steepest-descent method for variational inequality problems and the inertial techniques for finding fixed points of nonexpansive mappings. Strong convergence of the iterative algorithms is proved. Several fundamental experiments are provided to illustrate computational efficiency of the given algorithm and comparison with other known algorithms