• 제목/요약/키워드: SOP-D

검색결과 85건 처리시간 0.031초

디지털 카메라를 위한 새로운 자동초점조절 알고리즘의 연구 (A Study on a New Auto-Focusing Algorthem for Digital Cameras)

  • 신승현;박중호;김근섭;조일준;김성환
    • 대한전기학회논문지:시스템및제어부문D
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    • 제50권9호
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    • pp.447-453
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    • 2001
  • In this paper, a new auto-focusing algorithm for digital cameras is proposed. One of the primary concerns of digital image processing is to increase image quality, and the most important factor for degrading the images is the blurring effect due to inexact focusing. The blurring effect occurs when the focusing lens is located on an unsuitable position. Therefore, focusing on an object should be proceeded before acquiring images. The proposed auto-focusing algorithm is MMDT(min-max difference threshold), and the performance of the proposed algorithm is evaluated by the use of the focus curve. It is shown that the proposed algorithm is superior to other previous auto-focusing algorithms in both the focus shape and computation time aspects. Especially, the improvement of the focus curve shape in both monotonousness and slope indicates that focusing can be done rapidly in comparison with other previous proposed algorithms.

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유기 패키징 기판에서의 BTO 기반의 임베디드 MIM 커패시터의 특성 분석 (Characterization of BTO based MIM Capacitors Embedded into Organic Packaging Substrate)

  • 이승재;이한성;박재영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 제38회 하계학술대회
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    • pp.1504-1505
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    • 2007
  • In this paper, fully embedded high Dk BTO MIM capacitors have been developed into a multi-layered organic package substrate for low cost RF SOP (System on Package) applications. These embedded MIM capacitors were designed and simulated by using CST 3D EM simulators for finding out optimal geometries and verifying their applicability. The embedded MIM capacitor with a size of $550\;{\times}\;550\;um^2$ has a capacitance of 5.3pF and quality factor of 43 at 1.5 GHz, respectively. The measured performance characteristics were well matched with 3D EM simulated ones. Equivalent circuit parameters of the embedded capacitors were extracted for making a design library.

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스테레오 음향반향제거를 위한 간략화된 직교투사 알고리즘 (A Simplified Orthogonal Projection Algorithm for Stereo Acoustic Echo Cancellation)

  • 이행우
    • 한국정보통신학회논문지
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    • 제16권11호
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    • pp.2388-2396
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    • 2012
  • 본 논문에서는 스테레오 음향반향제거기의 수렴특성을 향상시키기 위한 간략화된 직교투사법을 제안한다. 간단하고 안정되어 널리 사용되고 있는 기존의 NLMS 알고리즘과 비교하여, 이 기술은 음성신호와 같이 상호상관도가 높은 신호에 대해 수렴성능이 향상되고 연산량이 감소한다. 본 연구에서 제안한 SOP 알고리즘의 성능을 검증하기 위하여 모의실험용 프로그램을 작성하고 시뮬레이션을 수행하였다. 입력신호의 종류와 적응 알고리즘에 따라서 반향제거기의 수렴특성을 관찰한 결과, 제안한 알고리즘을 적용한 스테레오 반향제거기는 백색 잡음을 입력으로 사용하는 경우 약 3dB 정도, 유색 음성신호를 입력으로 사용하는 경우 약 5dB 이상의 ERLE 성능이 개선되는 것을 보여 주었다.

1D-2D 통합 도시 침수 해석 모형을 이용한 침수 원인 분석에 관한 연구 (Simulation and analysis of urban inundation using the integrated 1D-2D urban flood model)

  • 이승수;노성진;장철희;이동섭
    • 한국수자원학회논문집
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    • 제50권4호
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    • pp.263-275
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    • 2017
  • 고정확도의 도시침수 모의를 위해서는 물리적 개념에 기반한 통합적 수치해석이 필요하다. 본 연구에서는 Lee et al. (2015)이 개발한 1차원 하수관망, 2차원 범람 모형의 국내 적용성을 검토하고, 과거 도시 홍수 사상의 침수 원인 분석을 수행하였다. 본 모형은 이중배수 개념에 기반하여 멘홀 대신 집수구를 지표면과 하수관망 사이의 교환유량 산정 지점으로 이용하므로 보다 실제와 유사하게 침수 과정을 모의할 수 있을 뿐 아니라 지표면 범람 해석시 건물에 의한 차단 효과를 고려할 수 있다. 개발된 모형의 적용성은 서울 사당 유역에서 발생한 침수 사상에 대해서 재현 모의를 통해 검증하였다. 적용 결과, 본 연구에서 개발된 모형은 실제 침수 피해 영역을 실제와 유사하게 모의 하였을 뿐만 아니라 침수 원인을 보다 자세히 분석할 수 있는 장점을 보여주었다.

3 차원 거리 측정 장치 기반 이동로봇용 비선형 도로 인식 (3D Depth Measurement System-based Nonliniar Trail Recognition for Mobile Robots)

  • 김종만;김원섭;신동용
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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    • pp.517-518
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    • 2007
  • A method to recognize unpaved road region using a 3D depth measurement system is proposed for mobile robots. For autonomous maneuvering of mobile robots, recognition of obstacles or recognition of road region is the essential task. In this paper, the 3D depth measurement system which is composed of a rotating mirror, a line laser and mono-camera is employed to detect depth, where the laser light is reflected by the mirror and projected to the scene objects whose locations are to be determined. The obtained depth information is converted into an image. Such depth images of the road region represent even and plane while that of off-road region is irregular or textured. Therefore, the problem falls into a texture identification problem. Road region is detected employing a simple spatial differentiation technique to detect the plain textured area. Identification results of the diverse situation of Nonlinear trail are included in this paper.

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The Propose of Requirements Based on Safety Assessment for UAV Handover

  • Seung, Young-Min;An, Kyeong-Soo;Kim, Woo-Sik
    • 한국컴퓨터정보학회논문지
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    • 제24권4호
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    • pp.91-97
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    • 2019
  • Recently, UAV manufacturers are developing UAV system in a form that can be controlled by CS regardless of UAV kind and using STANAG 4586 interface standard considering Interoperability. STANAG 4586 is a NATO military standard developed to control various UAVs with standardized equipment. In such a case, UAV handover will inevitably occur and it is one of the most important function for safe UAV flight in platform using STANAG 4586. In the future combat situation where collaboration between AV and UAV is anticipated, seamless handover of UAV is a part of continuous research. In this paper, we propose requirements for UAV handover based on ARP 4761 safety assessment and analyze feasibility of the requirements by comparing UAV handover process in STANAG 4586. As a result of the comparative analysis, the proposed handover requirements based on ARP 4761 includes all the handover procedures of STANAG 4586 and present additional considerations for SOP creation and CS development. Applying the proposed handover requirements in the UAV development process can reduce the probability of loss of UAV control over the handover process and it can be expected to help improve the safety of UAV.

Effect of Carbon Source and Carbon to Nitrogen Ratio on Carotenogenesis of Rhodotorula glutinis

  • Nam, Hee-Sop
    • Journal of Microbiology and Biotechnology
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    • 제1권1호
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    • pp.75-78
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    • 1991
  • The carotenoid biosynthesis of a red oleaginous yeast, Rhodotorula glutinis was significantly changed when the yeast was grown on different carbon substrates. The highest carotenoid production was obtained on culture medium containing glucose when the carbon to nitrogen ratio (C/N ratio) was adjusted to 25.7. Galactose stimulated the biosynthetic rate of torularhodin, a xanthophyll component of the yeast. With decreasing C/N ratio of the medium, significant changes of $\gamma$-carotene and torularhodin were observed such that increase in the torularhodin concentration was nearly equal to the decrease in $\gamma$-carotene. It was speculated that the nature of carbon substrate affected the metabolic rate of the cell, and accompanied by the different pattern of carotenoid accumulation in the cell.

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임의의 다차원 정보의 온라인 전송을 위한 상관기법전파신경망 (Correlation Propagation Neural Networks for processing On-line Interpolation of Multi-dimention Information)

  • 김종만;김원섭
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 학술대회 논문집 전문대학교육위원
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    • pp.83-87
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    • 2007
  • Correlation Propagation Neural Networks is proposed for On-line interpolation. The proposed neural network technique is the real time computation method through the inter-node diffusion. In the network, a node corresponds to a state in the quantized input space. Each node is composed of a processing unit and fixed weights from its neighbor nodes as well as its input terminal. Information propagates among neighbor nodes laterally and inter-node interpolation is achieved. Through several simulation experiments, real time reconstruction of the nonlinear image information is processed. 1-D CPNN hardware has been implemented with general purpose analog ICs to test the interpolation capability of the proposed neural networks. Experiments with static and dynamic signals have been done upon the CPNN hardware.

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우리나라 환자로부터 분리된 Cryptococcus neoformans의 균학적 특성과 혈청학적 진단용 항원 및 항체생산에 관한 연구 (A Study on the Mating Types and Serotypes of Clinical Isolates of Cryptococcus neoformans and Production of Serodiagnostic Antigen and Antiserum for Cryptococcosis)

  • 김상재;김신옥;이승호;정윤섭;석종성
    • 대한미생물학회지
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    • 제21권1호
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    • pp.127-131
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    • 1986
  • The mating types and serotypes of 10 clinical isolates of Cryptococcus neoformans have been investigated. Seven isolates were serotype A and three were serotype D and thus they fell in C. neoformans var. neoformans. Mating types of six isolates were found $\alpha$ and two were $\alpha$ but another two isolates were untypable. Enzyme linked immuno-sorbent assay(ELISA) using rabbit hyper-immune serum to cryptococcal polysaccharides was well adapted to the analysis of capsular polysaccharides in sera of the patients with cryptococcal meningitis.

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A 3V-30MHz Analog CMOS Current-Mode Digitally Bandwidth Programmable Integrator

  • Yoon, Kwang-Sub;Hyun, Jai-Sop
    • Journal of Electrical Engineering and information Science
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    • 제2권4호
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    • pp.14-18
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    • 1997
  • A design methodology of the analog current-mode and width programmable integrator for a low voltage (3V) and low power application is developed and the integrator designed by this method is successfully fabricated by the 0.8$\mu\textrm{m}$ CMOS n-well single poly/double metal standard digital process. The integrator occupies the active chip area of 0.3$\textrm{mm}^2$. The experimental result illustrates a low power dissipation (1.0mW∼3.55 mW), 65dB of the dynamic range, and digitally and width programmability (10MHz∼30MHz) with an external digital 4 bit.

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