• 정보처리학회논문지D
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• 제13D권2호
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• pp.223-234
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• 2006

분기 및 병합은 대규모 소프트웨어 개발에 있어 병렬개발을 지원할 수 있는 소프트웨어 형상관리의 대표적인 기법이다. 상업적인 용도로 쓰이는 기존의 소프트웨어 병합은 문자적 병합에만 의존하고 의미를 고려하지 않아 병합결과에서 의미적 오류를 발생시킬 수 있다. 현재까지 의미적 병합충돌 탐지 및 병합에 대한 연구가 이루어지고 있으나 의미적 병합충돌 및 병합에 대해서만 개별적으로 이루어지고 있으므로, 문자적 병합과정에서 의미적 충돌을 탐지하고 해결할 수 있는 기법에 대한 연구가 필요하다. 본 논문에서는 프로그램 원본에서 분기된 두개의 프로그램들을 병합하는데 있어서 그들 각각의 원본에 대한 각 라인별 수정, 삭제, 삽입 오퍼레이션들을 정의하여 병합과정에서 발생하는 문자적 충돌 및 실행행위에 관련된 의미적 충돌을 탐지하고 해결하여 병합하는 문자적 병합기법과 의미적 병합기법을 결합한 하이브리드 병합기법을 제시하였다.

• 한국소음진동공학회논문집
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• 제12권10호
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• pp.773-784
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• 2002

This paper proposes an optimal design to improve the performance of the intake system by reducing the noise. We adapt the Taguchi method and column merging method for the above design. At the first stage of the design, the length and radius of each component of the current intake system are selected as control factors. Then the $L^{18}$ table of orthogonal array is used to get the effective main factors. At the second stage, the $L^{16}$ table of orthogonal array and the column merging method is combined to analyze subdivided significant factors. We know that the robust design with the column merging method provides better design for noise of intake system than the robust design itself.

• 한국통신학회논문지
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• 제25권4B호
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• pp.725-733
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• 2000

본 논문에서는 MPEG-4의 텍스처 부호화시 변형된 경계 블록 병합 기법을 제안하였다. 경계 블록 병합 기법의 전처리 과정으로 VOP를 나누는 위치를 조절하여 병합 시 부호화해야 할 블록의 수가 최소가 되는 점을 찾아 이를 기준으로 VOP를 다시 분할하는 최적화된 영역 분할 방법을 제안하였다. 또한, 객체의 모양이 복잡한 경우에는 +90。 회전과 -90。 회전 병합을 추가함으로써 병합의 가능성을 높일 수 있다. 따라서 본 논문에서는 180。 회전 병합, +90。 회전 병합 그리고 -90。 회전 병합의 순서로 병합을 하는 다중 회전 병합을 제안하였다. 기존의 경계 블록 병합 기법에서는 병합이 되는 두 블록이 상관성이 적다면 큰 패딩의 효과를 기대할 수가 없게 된다. 따라서 본 논문에서는 병합을 해 준 후에 블록의 내용을 기반으로 패딩을 해 주었다. 제안한 방식은 기존의 경계 블록 병합 기법에 비해 동일 PSNR 하에서 약 5∼8(%) 정도 부호화 비트량을 감소시켰다.

• 대기
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• 제24권3호
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• pp.365-378
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• 2014

The limits of S-band dual-polarization radars in Korea are not reflected on the recent weather forecasts of Korea Meteorological Administration and furthermore, they are only utilized for rainfall estimations and hydrometeor classification researches. Therefore, this study applied four merging methods [SA (Simple Average), WA (Weighted Average), SSE (Sum of Squared Error), TV (Time-varying mergence)] to the QPE (Quantitative Precipitation Estimation) model [called RAR (Radar-AWS Rainfall) calculation system] using single-polarization radars and S-band dual-polarization radar in order to improve the accuracy of the rainfall estimation of the RAR calculation system. As a result, the merging results of the WA and SSE methods, which are assigned different weights due to the accuracy of the individual model, performed better than the popular merging method, the SA (Simple Average) method. In particular, the results of TVWA (Time-Varying WA) and TVSSE (Time-Varying SSE), which were weighted differently due to the time-varying model error and standard deviation, were superior to the WA and SSE. Among of all the merging methods, the accuracy of the TVWA merging results showed the best performance. Therefore, merging the rainfalls from the RAR calculation system and S-band dual-polarization radar using the merging method proposed by this study enables to improve the accuracy of the quantitative rainfall estimation of the RAR calculation system. Moreover, this study is worthy of the fundamental research on the active utilization of dual-polarization radar for weather forecasts.

• 대한원격탐사학회지
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• 제16권1호
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• pp.87-98
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• 2000

상업위성에서 공급되는 고해상도영상의 활용을 증대하기 위한 영상합성에 대한 관심이 증가하고 있다. 합성에 사용된 고해상도 흑백영상과 저해상도 다중분광영상은 항공기탑재 다중분광 주사기에 의해 촬영된 네 밴드의 영상을 이용하여 모의 제작하였다. 모의 합성된 2rl 해상도의 흑백 영상과 Bnl 해상도의 네 밴드 영상에 대하여 다섯 가지 합성방법(MWD, ItIS, PCA, HPF, CN, PCA) 을 적용하였다. 합성된 영상에 대해서 원래 영상들이 가지고 있던 공간해상도와 분광정보 측면의 특성을 분석하고자, 육안판독, 통계치비교, semivariogram, 분광반사특성 등을 비교하였다. MWD 변환방법에 의하여 합성된 영상이 공간해상도 및 분광정보 측면에서 모두 합성에 사용된 원래 영상과 근접한 결과를 보였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.1752-1757
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• 2008

Simple and highly efficient droplet merging method is proposed, which enables two nanoliter or picoliter droplets to merge regularly in a straight microchannel. We observe that two droplets of the same size but of different viscosities are merged by velocity difference induced as they are transported with the carrier fluid. To make viscosity difference, the mass ratio of water and glycerol is varied. Two droplets of the same size or of different sizes are generated alternatingly in the cross channel by controlling flowrates. This droplet merging method can be used to mix or encapsulate one target sample with another material, so that it can be applied to cell lysis, particle synthesis, drug discovery, hydrogel-bead production, and so on.

• 한국군사과학기술학회지
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• 제15권4호
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• pp.513-518
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• 2012

In this paper, we proposed a method of fast track merging which is the foundation of track to track association technique. The existing method of track merging is performed throughout comparison between tracks to tracks. Therefore, it has heavy calculation time. In our research, we developed a method for fast clustering by using nearest neighbor measurement identification. The simulation results show that the proposed method is more faster than previous method about 3.3%. We expect that this method could be effectively used in multi-target tracking particularly in heavy clutter environment.

• International Journal of Naval Architecture and Ocean Engineering
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• 제4권3호
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• pp.228-240
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• 2012

Morphing is a geometric interpolation technique that is often used by the animation industry to transform one form into another seemingly seamlessly. It does this by producing a large number of 'intermediate' forms between the two 'extreme' or 'parent' forms. It has already been shown that morphing technique can be a powerful tool for form design and as such can be a useful addition to the armoury of product designers. Morphing procedure itself is simple and consists of straightforward linear interpolation. However, establishing the correspondence between vertices of the parent models is one of the most difficult and important tasks during a morphing process. This paper discusses the mesh-merging method employed for this process as against the already established mesh-regularising method. It has been found that the merging method minimises the need for manual manipulation, allowing automation to a large extent.

• 제어로봇시스템학회논문지
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• 제5권8호
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• pp.907-913
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• 1999

For an automated transportation system like PRT(Personal Rapid Transit) system or IVHS, an efficient vehicle-merging algorithm is required for smooth operation of the network. For management of merging, collision avoidance between vehicles, ride comfort, and the effect on traffic should be considered. This paper proposes an unmanned vehicle-merging algorithm that consists of two procedures. First, a longitudinal control algorithm is designed to keep a safe headway between vehicles in a single lane. Secondly, 'vacant slot and ghost vehicle' concept is introduced and a decision algorithm is designed to determine the sequence of vehicles entering a converging section considering energy consumption, ride comfort, and total traffic flow. The sequencing algorithm is based on fuzzy rules and the membership functions are determined first by an intuitive method and then trained by a learning method using a neural network. The vehicle-merging algorithm is shown to be effective through simulations based on a PRT model.

• 대한공간정보학회지
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• 제10권5호
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• pp.45-51
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• 2002

The goal of image merging techniques are to enhance the resolution of low-resolution images using the detail information of the high-resolution images. Among the several image merging methods, wavelet-based image merging techniques have the advantages of efficient decorrelation of image bands and time-scale analysis. However, they have no regard for spatial information between the bands. In other words, multiresolution data merging methods merge the same information-the detail information of panchromatic image-with other band images, without considering specific characteristics. Therefore, a merged image contains much unnecessary information. In this paper, we discussed this 'mixing' effect and, proposed a method to classify the detail information of the panchromatic image according to the spatial and spectral characteristics, and to minimize distortion of the merged image.