• Title/Summary/Keyword: 이차원

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Analysis of Channel Doping Concentration Dependent Subthreshold Swing for Double Gate MOSFET (이중게이트 MOSFET에서 채널도핑농도에 따른 서브문턱스윙 분석)

  • Han, Ji-Hyung;Jung, Hak-Kee;Lee, Jae-Hyung;Jeong, Dong-Soo;Lee, Jong-In;Kwon, Oh-Shin
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2008.05a
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    • pp.709-712
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    • 2008
  • 본 연구에서는 이중게이트 MOSFET 제작시 가장 중요한 요소인 채널도핑농도가 전송특성에 미치는 영향을 분석하고자 한다. 이를 위하여 분석학적 전송모델을 사용하였으며 분석학적 모델을 유도하기 위하여 포아슨방정식을 이용하였다. 나노구조 이중게이트 MOSFET에서 문턱전압이하의 전류전도에 영향을 미치는 열 방사전류와 터널링전류에 대하여 분석하였으며 본 연구의 모델이 타당하다는 것을 입증하기 위하여 서브문턱스윙값과 채널도핑농도의 관계를 이차원 시뮬레이션 값과 비교하였다. 결과적으로 본 연구에서 제시한 전송특성모델이 이차원 시뮬레이션모델과 매우 잘 일치하였으며 이중게이트 MOSFET의 구조적 파라미터에 따라 전송특성을 분석하였다.

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Analysis of Tunneling Transition by Characteristics of Gate Oxide for Nano Structure FinFET (나노구조 FinFET에서 게이트산화막의 특성에 따른 터널링의 변화 분석)

  • Han, Ji-Hyung;Jung, Hak-Kee;Lee, Jae-Hyung;Jeong, Dong-Soo;Lee, Jong-In;Kwon, Oh-Shin
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2008.05a
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    • pp.751-754
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    • 2008
  • 본 연구에서는 나노구조 FinFET 제작시 게이트산화막 특성이 서브문턱영역에서 전송특성에 미치는 영향을 분석하고자 한다. 이를 위하여 분석학적 전송모델을 사용하였으며 분석학적 모델을 유도하기 위하여 포아슨방정식을 이용하였다. 나노구조 FinFET에서 문턱전압이하의 전류전도에 영향을 미치는 열방사전류와 터널링전류에 대하여 분석하였으며 본 연구의 모델이 타당하다는 것을 입증하기 위하여 서브문턱스윙값을 이차원 시뮬레이션값과 비교하였다. 결과적으로 본 연구에서 제시한 전송특성모델이 이차원 시뮬레이션모델과 매우 잘 일치하였으며 FinFET의 전송특성이 게이트산화막의 특성에 따라 매우 큰 변화를 보이는 것을 알 수 있었다. 특히 게이트길이가 작아지면서 전송특성에 커다란 영향을 미치는 터널링특성에 대하여 집중적으로 분석하였다.

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Proposing Shape Alignment for an Improved Active Shape Model (ASM의 성능향상을 위한 형태 정렬 방식 제안)

  • Hahn, Hee-Il
    • Journal of Korea Multimedia Society
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    • v.15 no.1
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    • pp.63-70
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    • 2012
  • In this paper an extension to an original active shape model(ASM) for facial feature extraction is presented. The original ASM suffers from poor shape alignment by aligning the shape model to a new instant of the object in a given image using a simple similarity transformation. It exploits only informations such as scale, rotation and shift in horizontal and vertical directions, which does not cope effectively with the complex pose variation. To solve the problem, new shape alignment with 6 degrees of freedom is derived, which corresponds to an affine transformation. Another extension is to speed up the calculation of the Mahalanobis distance for 2-D profiles by trimming the profile covariance matrices. Extensive experiment is conducted with several images of varying poses to check the performance of the proposed method to segment the human faces.

Algorithm of Decoding the Data Codeword in Two-Dimensional QR Code (이차원 QR Code에서 데이터 코드워드의 디코딩 알고리즘)

  • Park, Kwang Wook;Lee, Jong Yun
    • Journal of the Korea Convergence Society
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    • v.4 no.4
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    • pp.21-29
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    • 2013
  • Two-dimensional QR Code has improved greatly the limits on the capacity, size, direction of the one-dimensional bar code. And it has the capacity of compressing and storing the massive amount of data and is widely used in many applications. Recently, the two-dimensional QR Code has been spread rapidly because of introducing the smart phones and increasing the amount of using them. However, there is little documentations about decoding the QR Code in which can store the large amount of information. In this paper, therefore, we present specific processing procedures and algorithms on decoding the two-dimensional QR Code and then make us understand their decoding process by explaining some examples.

A Study on Measurement of Premixed Spray Flame using Cross-correlation PIV (상호상관 PIV를 이용한 예혼합 분무화염의 계측에 관한 연구)

  • Yang Young-Joon;Kim Bong-Hwan
    • Journal of Energy Engineering
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    • v.14 no.4 s.44
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    • pp.259-267
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    • 2005
  • In an attempt to elucidate combustion mechanism or premixed spray flame in detail, both the enlarged photographing, which was performed for spray cross-sectional images of premixed spray flame, and the cross-correlation PIV, which was performed for consecutive time-series images to obtain instantaneous two dimensional flow field, were applied. This study indicated that CW laser as well as pulse laser could be applied for PIV. Furthermore, the results of cross-correlation PIV, which was self-made PIV program, was shown in good agreement with those of PDA. Therefore, it was verified that cross-correlation PIV using CW laser in this study could be effectively used for observing structure of premixed spray flame.

Crop proteomics: Practical method for high resolution of two-dimensional electrophoresis (작물 단백질체 분석을 위한 이차원 전기영동 사용법)

  • Kim, U.G.;Jung, Hwa-Jin;Lee, Su-Ji;Kim, Sun-Tae
    • Journal of Plant Biotechnology
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    • v.39 no.1
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    • pp.81-92
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    • 2012
  • Two-dimensional gel electrophoresis (2-DGE) is one of the most important technologies for high-resolution separation of proteins for proteomics. In this study, we present a detail 2-DGE protocol which allows detection and quantification of total plant proteins separated on gels to improve matching in image analysis. This protocol highlighted here may be useful for researchers, who like to first study for the development of protein biomarkers involved in development, biotic and abiotic stresses in plant.

Adaptive Finite Element Analysis of 2-D Plane Problems Using the rp-Method (절점이동과 단항증가법에 의한 이차원 평면문제의 적응 유한요소 해석)

  • 박병성;임장근
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.17 no.1
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    • pp.1-10
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    • 2004
  • Adaptive finite element analysis, in which its solution error meets with the user defined allowable error, is recently used to improve the reliability of finite element analysis results. This adaptive analysis is composed of two procedures; one is the error estimation of an analysis result and the other is the reconstruction of finite elements. In the (p-method, an element size is controlled by relocating of nodal positions (r-method) and the order of an element shape function is determined by the hierarchical polynomial (p-method) corresponding to the clement solution error by the enhanced SPR. In order to show the effectiveness and the accuracy of the suggested rp-method, various numerical examples were analyzed and these analysis results were examined by comparing with those obtained by the existed methods.

Extraction of Text Alignment by Tensor Voting and its Application to Text Detection (텐서보팅을 이용한 텍스트 배열정보의 획득과 이를 이용한 텍스트 검출)

  • Lee, Guee-Sang;Dinh, Toan Nguyen;Park, Jong-Hyun
    • Journal of KIISE:Software and Applications
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    • v.36 no.11
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    • pp.912-919
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    • 2009
  • A novel algorithm using 2D tensor voting and edge-based approach is proposed for text detection in natural scene images. The tensor voting is used based on the fact that characters in a text line are usually close together on a smooth curve and therefore the tokens corresponding to centers of these characters have high curve saliency values. First, a suitable edge-based method is used to find all possible text regions. Since the false positive rate of text detection result generated from the edge-based method is high, 2D tensor voting is applied to remove false positives and find only text regions. The experimental results show that our method successfully detects text regions in many complex natural scene images.

Design of Open Vector Graphics Accelerator for Mobile Vector Graphics (모바일 벡터 그래픽을 위한 OpenVG 가속기 설계)

  • Kim, Young-Ouk;Roh, Young-Sup
    • Journal of Korea Multimedia Society
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    • v.11 no.10
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    • pp.1460-1470
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    • 2008
  • As the performance of recent mobile systems increases, a vector graphic has been implemented to represent various types of dynamic menus, mails, and two-dimensional maps. This paper proposes a hardware accelerator for open vector graphics (OpenVG), which is widely used for two-dimensional vector graphics. We analyze the specifications of an OpenVG and divide the OpenVG into several functions suitable for hardware implementation. The proposed hardware accelerator is implemented on a field programmable gate array (FPGA) board using hardware description language (HDL) and is about four times faster than an Alex processor.

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Comparison of Step-Wise and Exact Maximum Likelihood Estimations on Cell Probabilities of Contingency Table (단계별로 얻어진 이차원 분할표의 모수 추정을 위한 정확최대우도추정법과 단계별추출추정법의 비교)

  • Lee, Sang-Eun;Kang, Kee-Hoon;Jeung, Seok-O;Shin, Key-Il
    • Communications for Statistical Applications and Methods
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    • v.17 no.1
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    • pp.67-77
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    • 2010
  • In multinomial scheme with step-wise sampling, maximum likelihood estimates of multinomial probabilities are improved when some frequencies are merged. In this study, for cell probabilities in a I by J independent contingency tables, exact MLE and step-wise estimation methods are applied and the results are compared using MSE and Bias.