• 한국지구물리탐사학회:학술대회논문집
• /
• 2007.06a
• /
• pp.58-63
• /
• 2007

We developed a new algorithm for jointly inverting dc resistivity and seismic travel time tomography data based on the multiple constraints: (1) structural similarity based on cross-gradient, (2) correlation between two different material properties, and (3) a priori information on the material property distribution. Through the numerical experiments of surface dc resistivity and seismic refraction surveys, the performance of the proposed algorithm was demonstrated and the effects of different regularizations were analyzed.

• Journal of the Korean Institute of Telematics and Electronics B
• /
• v.30B no.7
• /
• pp.59-69
• /
• 1993

In this paper, a new matching strategy for 3-D object recognition, based on the Surface Normal Images (SNIs), is proposed. The matching strategy using the similarity decision function [9,10] lost the efficiency and the reliability of matching, because all features of models within model base must be compared with the scene object features, and the weights of the attributes of features is given by heuristic manner. However, the proposed matching strategy can solve these problems by using a new approach. In the approach, by searching the model base, a model object whose features are fully matched with the features of sceme object is selected. In this paper, the model base is constructed for the total 26 objects, and systhetic and real range images are used in the test of the system operation. Experimental result is performed to show the possibility that this strategy can be effectively used for the SNI based recognition.

• Proceedings of the IEEK Conference
• /
• 2007.07a
• /
• pp.299-300
• /
• 2007

Along with the development of imaging sensors, hyperspectral imaging technology is growing rapidly and contributing to many fields of science nowadays. However, the bulky size and complex structure make it difficult to be processed. Focused on in this paper is the clustering utility, implemented in HYVEW, a program involving tools and functions to manipulate with hyperspectral images. The clustering process aims to partition the surface of the imaged area into subregions by grouping the spectra subject to the similarity of spectra.

• The Korean Journal of Mycology
• /
• v.42 no.4
• /
• pp.349-352
• /
• 2014

The fungal endophyte EML-CM25 was isolated in Korea from surface sterilized Chinese maple leaf tissues. Internal transcribed spacer sequence analysis indicated that the isolate showed 99% sequence similarity with Paraconiothyrium brasiliense, a finding that was confirmed by morphological analyses. The fungal colonies did not express aerial hyphae. Conidiomata formation was observed in the fungus cultured on potato dextrose agar at $25^{\circ}C$ for 7 days. Visible scattered black dots consisting of pycnidia were present throughout the colony. This is the first record of P. brasiliense in Korea.

• KSCI Review
• /
• v.14 no.1
• /
• pp.197-204
• /
• 2006

This paper proposes an similar sentence searching algorithm for the computer-aided translation. The Proposed algorithm, which is based on the Needleman-Wunsch algorithm, measures the similarity between the input sentence and the example sentences through combining surface. lemma, part-of-speech information of words with the multi-layered information. It also carries out the alignment between them. The accuracy of the proposed algorithm was very high in the experiment for the example sentences of the area of electricity and communication.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.11a
• /
• pp.516-518
• /
• 2012

일반적으로 표적에 대한 탐지는 감시장비의 성능과 지형지물의 차폐 여부가 가장 큰 영향을 준다. 본 연구는 SRTM DSM (Digital Surface Model)과 국방지형정보단 DEM (Digital Elevation Model) 그리고 여기에 수목고를 고려한 DCM (Digital Canopy Model)고도를 기반으로 탐지확률 실험을 하였다. 실험결과 DCM과 DEM 기반의 탐지확률 결과가 가장 유사성이 높았고, SRTM과 DEM 기반의 탐지 확률은 차이가 나는 것으로 확인하였다. 따라서 SRTM이 이론적으로 DSM으로 고려되지만, 향후 추가적인 연구를 통해 이에 대한 분석이 더 필요할 것으로 사료된다.

• Journal of the Korea Society of Computer and Information
• /
• v.24 no.7
• /
• pp.31-37
• /
• 2019

Citation-based article summarization is to create a shortened text for an academic article, reflecting the content of citing sentences which contain other's thoughts about the target article to be summarized. To deal with the problem, this study introduces an extractive summarization method based on calculating a linear combination of various sentence salience scores, which represent the degrees to which a candidate sentence reflects the content of author's abstract text, reader's citing text, and the target article to be summarized. In the current study, salience scores are obtained by computing surface-level textual similarities. Experiments using CL-SciSumm datasets show that the proposed method parallels or outperforms the previous approaches in ROUGE evaluations against SciSumm-2017 human summaries and SciSumm-2016/2017 community summaries.

• Journal of the Semiconductor & Display Technology
• /
• v.16 no.3
• /
• pp.99-105
• /
• 2017

This paper confirms the similarity of temperature tendency through numerical analysis and comparison with test, and it also confirms that temperature prediction of LED lightings is possible by numerical analysis. We confirmed that the temperature difference is about $10{\sim}20^{\circ}C$ except for some measurement points and shows similar tendency with the interpretation through manufacturing and performance analysis of AL heat sink applied Circular LED street lights and manufacturing and performance analysis of CMP-PLA heat sink applied Circular LED street lights. The simulations use Octree technique in SC/Tetra to set the grid size df the surface.

• International Journal of Naval Architecture and Ocean Engineering
• /
• v.11 no.1
• /
• pp.202-210
• /
• 2019

The obstacles modeling is a fundamental and significant issue for path planning and automatic navigation of Unmanned Surface Vehicle (USV). In this study, we propose a novel obstacles modeling method based on high resolution satellite images. It involves two main steps: extraction of obstacle features and construction of convex hulls. To extract the obstacle features, a series of operations such as sea-land segmentation, obstacles details enhancement, and morphological transformations are applied. Furthermore, an efficient algorithm is proposed to mask the obstacles into convex hulls, which mainly includes the cluster analysis of obstacles area and the determination rules of edge points. Experimental results demonstrate that the models achieved by the proposed method and the manual have high similarity. As an application, the model is used to find the optimal path for USV. The study shows that the obstacles modeling method is feasible, and it can be applied to USV path planning.

• Steel and Composite Structures
• /
• v.43 no.2
• /
• pp.221-228
• /
• 2022

Two-dimensional stagnation point slip flow of a Casson fluid impinging normally on a flat linearly shrinking surface is considered. The modeled PDEs are changed into nonlinear ODEs through appropriate nonlinear transformations.The flow is assumed to be steady and incompressible, with external magnetic field acting on it. Similarity transformation is utilized to investigate the behavior of many parameters for heat and velocity distributions using truncation approach.The influence of buoyancy parameter, slip parameter, shrinking parameter, Casson fluid parameter on the heat profile. The effect of the magnetic parameter on the streamwise velocity profile is also investigated.