• 대한전기학회논문지:시스템및제어부문D
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• 제50권11호
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• pp.532-540
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• 2001

In this paper, we propose a probabilistic tabu search strategy for function optimization. It is composed of two procedures, one is Basic search procedure that plays a role in local search, and the other is Restarting procedure that enables to diversify search region. In basic search procedure, we use Belief space and Near region to create neighbors. Belief space is made of high-rank neighbors to effectively restrict searching space, so it can improve searching time and local or global searching capability. When a solution is converged in a local area, Restarting procedure works to search other regions. In this time, we use Probabilistic Tabu Strategy(PTS) to adjust parameters such as a reducing rate, initial searching region etc., which makes enhance the performance of searching ability in various problems. In order to show the usefulness of the proposed method, the PTS is applied to the minimization problems such as De Jong functions, Ackley function, and Griewank functions etc., the results are compared with those of GA or EP.

• International Journal of Aeronautical and Space Sciences
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• 제18권4호
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• pp.719-728
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• 2017

This paper proposes a synthesis of new guidance law to generate an evasive maneuver against enemy's missile interception while considering its impact angle, acceleration, and field-of-view constraints. The first component of the synthesis is a new function of repulsive Artificial Potential Field to generate the evasive maneuver as a real-time dynamic obstacle avoidance. The terminal impact angle and terminal acceleration constraints compliance are based on Time-to-Go Polynomial Guidance as the second component. The last component is the Logarithmic Barrier Function to satisfy the field-of-view limitation constraint by compensating the excessive total acceleration command. These three components are synthesized into a new guidance law, which involves three design parameter gains. Parameter study and numerical simulations are delivered to demonstrate the performance of the proposed repulsive function and guidance law. Finally, the guidance law simulations effectively achieve the zero terminal miss distance, while satisfying an evasive maneuver against intercept missile, considering impact angle, acceleration, and field-of-view limitation constraints simultaneously.

• International Journal of Advanced Culture Technology
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• 제6권4호
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• pp.143-151
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• 2018

Industrialization has accelerated the expansion of mobility to the urban areas, land use for function of residence and consumption. With the urbanization, the management and distribution of the physical space of the city and rational design have also become major issues. Rapid and widespread urbanization has consistently accumulated problems of natural, physical, environmental, and psychological circumstances, and most of urban areas have begun to focus on restoring an efficient, safe and healthy urban environment to improve of the quality of life since the latter half of the 20th century, New-Urbanism is a new urban development paradigm that resembles the practical implications of a shared economy for social, economic and environmental cost reduction.. The geographical significance of the sharing city's concept of the alleys is to revitalize sustainable cities while restoring the attractive elements of the city. This study examines the lessons of New-Urbanism in those traditional urban space comparing with each East Asia's cities such as golmok (alley or backlane) in Seoul, Huton in Beijing, Lilong in Shanghai, and Roji in Japan. This study diagnoses whether main principals of New-Urbanism such as development of good community and walkable pedestrian route, restoration of regional identity and sense of the place, and mitigation of climate change strategy can be practiced in the community of alley as well.

• 대한수학회논문집
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• 제32권1호
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• pp.147-163
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• 2017

We define de Sitter focal surfaces and hyperbolic focal surfaces of hyperbolic space curves. As an application of the theory of unfoldings of function germs, we investigate the singularities of these surfaces. For characterizing the singularities of these surfaces, we discover a new hyperbolic invariants and investigate the geometric meanings.

• Journal of Astronomy and Space Sciences
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• 제21권4호
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• pp.263-274
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• 2004

한국천문연구원 보현산 천문대(Bohyunsan Optical Astronomical Observatory, BOAO)의 BOES(Bohyunsan Optical Echelle Spectrograph)를 이용하여 2003년 2월 26-27일 이틀간에 걸쳐 BX And의 고분산 관측을 수행하였다. 이 관측을 통하여 얻은 스펙트럼은 총 38개로 위상 $0.1{\sim}0.3$에 이르는 구간을 제외하고는 전위상에 걸쳐 골고루 관측이 이루어졌다. 시선속도를 구하기 위하여 BF(Broadening Function)와 CCF(Cross-Correlation Function)를 이용한 방법 이 모두 사용되었다. CCF를 이용하였을 때는 주성의 시선속도만을 얻은 반면, BF인 경우, 주성과 반성의 시선속도 모두를 잘 결정할 수 있었다. 새로운 시선속도곡선으로부터 주성과 반성의 최대 시선속도를 각각 $K_1=96.1km/s$와 $K_2=196.6km/s$으로 얻었으며, 이를 Bell et al.(1990)의 측광해와 결합하여 BX And의 절대 물리량을 새롭게 결정하였다.

• Journal of Electrical Engineering and information Science
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• 제3권2호
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• pp.267-273
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• 1998

This paper introduces an adaptive algorithm determining the measurement-track association problem in multi-target tracking(MTT). We model the target and measurement relationships with mean field theory and then define a MAP estimate for the optimal association. Based on this model, we introduce an energy function defined over the measurement space, that incorporates the natural constraints for target tracking. To find the minimizer of the energy function, we derived a new adaptive algorithm by introducing the Lagrange multipliers and local dual theory. Through the experiments, we show that this algorithm is stable and works well in general environments. Also the advantages of the new algorithm over other algorithms are discussed.

• 대한수학회논문집
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• 제37권3호
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• pp.723-734
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• 2022

In this work, we introduce a new subclass of analytic functions of complex order involving the (p, q)-derivative operator defined in the open unit disc. For this class, several Fekete-Szegö type coefficient inequalities are derived. We obtain the results of Srivastava et al. [22] as consequences of the main theorem in this study.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 신호처리소사이어티 추계학술대회 논문집
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• pp.385-388
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• 2003

In this paper, we propose a new saturation enhancement algorithm which is processed on the new color space, called Normalized YCbCr(NYCbCr). The algorithm consists of two processing unit. One is color space conversion from YCbCr to NYCbCr, and the other is using adaptive saturation mapping function(ASMF). NYCbCr color space is designed to prevent shortcomings such as luminance and hue shift of YCbCr color space and by saturation enhancement. ASMF is effective to enhance saturation properly for each image and to protect low saturation regions of color images from over-saturation. we verified our method using several color images. Experimental results show that the proposed method enhance the saturation with minimizing Luminance and Hue shift.

• 한국실내디자인학회논문집
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• 제19권3호
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• pp.188-195
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• 2010

The museum architecture has been developed with new social and cultural movement because of the its representative role of cultural character. After emergence of the modern museum in Korea, the function and role of the museum has been changed and developed especially after increasing role by local government. The cultural desire by the new pace of consumerism has requested museums to undergo with some changes and advancements in their function and programs. This research aims to examine the progress of museum programs in Korea even though it has sort history. The scope of the analysis is discussed the extension of existing and new national museums which could be the measurement of the direction of the policy for museum. These changes have a tendency to correspond to social and cultural demands. Based on the existing program, new programs accommodate education and services which represent the characteristic of the museums. These changes caused the extension of the existing museums and the emergence of the small museums which has special program fields and even influences to expand existing museums for sub-characters. The study for chronological changes could be useful to establish the basic guidelines of the configuration for the museum program and space in the early stages for the new construction.

• 한국실내디자인학회논문집
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• 제22권3호
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• pp.108-116
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• 2013

This study has the purpose to review the way of experience element and property of space design appearing in vocational experience space and accumulate basic study material for children's vocational experience space and build systematic and specialized modules. Analysing the marketing elements of experience space through pilot research to arrange frame of analysis, and in a determined range, experimental marketing's property appearing in children's vocational experience center is analysed. This researcher analysed experimental displaying space's function of recognition, emotional, behavior, sense marketing and experimental marketing induced from pilot research on space design expressive elements of experimental marketing when it is applied to spaces through the frame of analysis with the combination of total 8 kind's experience display space function such as investigative, conceptional, aesthetic, entertaining, logical, relative, participating, and comprehensive experience based on 5 vocational experience spaces located in Seoul and Gyeonggi, opened after 2010, being operated at present with more than 500 pyeong (about 1,650 square meter) and targeted for children, after this researcher visited the site directly to make check list with the frame of analysis together with the staff and administrator in charge of vocational experience education. As a conclusion, vocational experience center is a space of edutainment helping children experience various profession more easily to find their interest and to bring up their dream. By analysing current vocational experience center through the element called experimental marketing, current status of vocational experience center could be known. the experience itself in vocational experience center becomes a merchandise. Instead of mere experience, so as to get professional experience and new information, new experiences should be provided by incessant variation and development. This study is to build basic research data for children's vocational experience space, however not only drawing specialty of vocational experience center through the connection of enterprises based on the contents arranged above but also systematic and specialized modules are expected to be built in next researches.