• Proceedings of the Korea Information Processing Society Conference
• /
• 2013.11a
• /
• pp.520-522
• /
• 2013

스마트 폰의 확산으로 대화의 개념이 음성에서 텍스트로 확대 되고 있다. 방대하게 누적되고 있는 메신저의 텍스트 데이터로부터 유용한 정보들을 찾아 사용자에게 추천서비스를 제공할 수 있다. 이를 뒷받침 해주기 위해서는 텍스트 감정 인식이 중요하다. 기존에는 PMI기법과 감정키워드를 이용하여 감정을 분류 하였다. 그러나 특정단어로 감정을 분류하기 때문에 정확도가 낮았다. 본 논문에서는 복합색인어 기반 텍스트 감정 인식 기법을 제안한다. 문장에서 동사와 복합색인어를 추출하여 음운으로 분해한다. 그리고 스트링커널에서 벡터 값을 추출하여 기계학습 알고리즘(SVM)으로 4가지 감정(행복, 슬픔. 화남, 평범)으로 분류하는 방법이다. 동사와 감정에 영향을 주는 색인어를 추출하여 감정을 인식하는 기법으로 실험결과 정확도는 기존에 동사만 사용했을 때 보다 15%향상됨을 보였다.

• Computational Structural Engineering
• /
• v.11 no.4
• /
• pp.267-274
• /
• 1998

본 연구에서는 기지개와 미시구멍으로 구성된 복합재료에 입자보강 복합재료의 등가 재료상수 예측기법인 평균장 근사이론과 등가원리를 적용하여 위상 최적화에 필요한 등가 재료상수와 설계변수와의 상관관계식을 유도하였다. 또한, 유도된 관계식에 중간값을 갖는 설계변수의 수를 줄이기 위하여 벌칙인자를 도입하였다. 그리고 본 연구의 타당성을 검증하기 위하여 벌칙인자가 도입된 위상 최적화문제를 순차이차계획법인 PLBA 알고리즘을 이용하여 해석하였다.

• Proceedings of the Korean Society For Composite Materials Conference
• /
• 1999.04a
• /
• pp.119-124
• /
• 1999

• The magazine of the Korean Society for Advanced Composite Structures
• /
• v.6 no.3
• /
• pp.17-23
• /
• 2015

• Journal of Digital Convergence
• /
• v.13 no.5
• /
• pp.245-250
• /
• 2015

The P2P technology is becoming a technology for receiving a service, such as the latest YouTube and Facebook. P2P technology can be easily downloaded to a large amount of multimedia content over a distributed environment. However, pictures, music, a large amount of multimedia content such as videos each user is unable to manage the content management operating smoothly because, Song communication processing overhead caused when the reception is likely to remain the problem. In this paper, we propose a convergence content management technique that provides a low communication overhead of the frequency of use of the convergence content when trying to provide a large amount of convergence content to users in a distributed environment. Our method can be used to select the appropriate frequency is high among the shared content on the P2P multimedia environments that are distributed across a frequency of use of the convergence content and provides the service. Experimental evaluation proposed method, the convergence content browsing speed than conventional techniques improved communication about 13.3% and reduced overhead to about 9.5%.

• Composites Research
• /
• v.12 no.3
• /
• pp.26-35
• /
• 1999

The static strength and fatigue life of repaired graphite/epoxy laminates are observed using tensile coupon. The lay-up of investigated laminates was [$0^{\circ}$/$\pm$$45^{\circ}$/$90^{\circ}$]$_s$. Static strength was measured from the specimens prepared by various repair techniques such as precured-single patch, precured-double patch and cure-in-place methods. The strength was recovered to the extent of 60~80 % of unnotched case. Fatigue life was also measured from the laminates repaired with cure-in-place method. Hwang and Han's MFLPE 1(modified fatigue life prediction equation 1), which was based on the fatigue modulus degradation model and reference modulus, was chosen for fatigue life prediction of repaired specimen and compared with the conventional fatigue life equation such as S-N curve and Basquin's relation. The MFLPE 1 has better agreement with experimental data than S-N curve and Basquin's relation.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2005.11a
• /
• pp.91-94
• /
• 2005

공학적 기반의 응용 프로그램에서는 복합관계(complex relationship) 및 복합객체(complex object)의 개념이 요구되는데, 이러한 개념들은 비즈니스 응용에 적합한 관계형 데이터베이스로 다루기에는 저장과 검색 시 많은 문제점을 야기한다. 이와 같은 문제점을 해결하기 위해서 객체 관계형 데이터베이스 시스템이 출현하게 되었다. 한편, 고전적인 데이터베이스 설계 기법은 개체 관계형 모델(Entity Relationship Model)과 같은 개념적 모델을 사용하며 데이터 중심의 구조적 관점(structural aspect)만을 고려하는 반면, UML(Unified Modeling Language)같은 객체지향형 설계 도구를 사용하여 데이터베이스를 설계할 경우 구조적 관점 및 행위적 관점(behavioral aspect)을 모두 포함한다. UML은 확장 가능한 언어로서, 특정 응용프로그램에 대한 새로운 스테레오타입(stereotype)의 사용이 가능하다. 데이터베이스 설계를 위한 확장된 UML의 스테레오타입이 제안되었지만, 대부분 관계형 데이터베이스에 초점이 맞추어져 있다. 본 논문에서는 객체 관계형 데이터베이스 설계를 위한 확장된 UML 스테레오타입을 기술하며, 복합관계 및 복합객체를 지원하기 위해 Aggregation, Composition, Association의 개념을 재정의한 설계기법을 제안하고, 제안한 설계기법을 지원하는 설계 도구(ORDesigner)의 구현에 대해서 기술한다.

• Journal of Aerospace System Engineering
• /
• v.11 no.4
• /
• pp.30-35
• /
• 2017

In this work, a manufacturing and structural test of 1kW class horizontal axis wind turbine blade using natural-fiber composite was performed. The aerodynamic design of blade was performed after investigation on design requirement. The structural design load was investigated after aerodynamic design of blade. And also, structural design of blade was carried out. The structural design of blade was carried out using the simplified methods such as the netting rule and the rule of mixture applied to composite. The structural safety of the designed blade structure is investigated through the various load cases, stress, deformation and buckling analyses using the FEM method. Finally, the blade manufacturing and structural test using natural composite was carried out.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.6 no.2
• /
• pp.19-27
• /
• 1988

In determining the horizontal positions, economic, speedy, and accurate analytical adjustment methods have studied and developed for a long time. From now on, the adjustment methods using both angles and distances are expected because the development of more precise instruments, E.D.M, and electronic total station provide us with more advantages than the conventional measurement system. The objective of this paper is to study the characteristics of triangulation, trilateration, and combination method due to change of the weight factor of angles, distances, azimuthes, and control point coordinates of combined geodetic network. The results of this study show that combined method is more accurate and effective than other methods in case of combined geodetic network as the other simple networks.

• Journal of KIISE:Computer Systems and Theory
• /
• v.29 no.8
• /
• pp.445-455
• /
• 2002

In this paper, we present a new task scheduling scheme ior the efficient execution of the tasks of compound nodes of hierarchical task graph(HTG) on shared memory system. The proposed scheme for exploitation functional parallelism is autoscheduling that performs the role of scheduling by processor itself without any dedicated global scheduler. To adapt the proposed scheduling scheme for various platforms, Including a uni-processor systems, Java threads were used for implementation, and the performance is analyzed in comparison with a conventional bit vector method. The experimental results showed that the proposed method was found to be more efficient in its execution time and exhibited good load-balancing when using the experimental parameter values. Furthermore, the memory size could be reduced when using the proposed algorithm compared with a conventional scheme.