• 전자공학회논문지B
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• 제29B권9호
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• pp.59-67
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• 1992

Color image enhancement can be achieved easily by using linear form of coordinate system. But some popular color coordinate systems almost have nonlinear characteristics in the geometric form. In this paper, the proposed coordinate system has pseudo-linear form and based on IHS system which represents human color perception appropriately. And for the image intensity processing, an edge-preserving smoothing algorithm is presented.

• 한국CDE학회논문집
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• 제13권6호
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• pp.440-449
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• 2008

This paper deals with a method calculating various hull form parameters which are required in numerical analysis for ship performance such as motion, maneuverability, resistance and propulsion, etc. After the hull form is designed, before the model tests the ship's performances are evaluated by various analysis tools in which the hull form parameters are used with many kinds of forms aside from offset data. Here, The hull form parameters characterize the properties of hull form and contain positional, differential and integral information implicitly. Generally, the commercial CAD-system has not functions enough for supporting these form parameters and therefore each shipyard uses its own in-house analysis program as well as commercial analysis software. To overcome these limitations, modules for supporting these analysis programs have developed. The modules contain cubic composite spline cure using local curve fairing, intersect algorithm, Gaussian integral, and other geometric techniques needed in calculating hull form parameters. Using our analysis-supporting modules, a complex hull form can be remodeled exactly to the hull form designed by CAD-system and any hull form parameter required in various performance analyses can be calculated.

• 복식
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• 제55권5호
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• pp.55-64
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• 2005

The concern with three-dimensional measurement has been growing in recent years. And over the last few years, several studies have been made on three-dimensional measurement. Some of the studies using a three-dimensional measurement have focused on type of form of human body and evaluation of fitness. But there has been no study about applications of three-dimensional measurement system for shape analysis. So, the purpose of this study was to investigate about application of three-dimensional mea-surement system lot shape analysis. The instrument and tools for three-dimensional measurement was Whole Body 3D scanner(model name: Exyma-WBS2H). Analysis program used in experiment is Rapid Form 2004 PPI (INUS technology, Int, Korea). The following results were obtained; 1. The point data using three-dimensional measurement system built 3D model. 2. The three-dimensional data were used to analyze length and curvature of shape. 3. The shape using three-dimensional measurement system could be used in variety field.

• 한국건설관리학회논문집
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• 제12권5호
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• pp.3-11
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• 2011

타 분야 대비 국내 건설산업의 정보화 노력은 일시적 현상에 그쳐 정보화 역량이 비교적 부족한 현상이 나타나고 있다. 특히 PMIS(Project Management Information System)는 건설관련 업체들 대부분이 구축하여 운용하고 있으나 그 효과나 현장에서의 실효성이 떨어지고 있다. 본 연구는 건설업체 한 곳의 35 개 현장을 대상으로 전반적인 PMIS 활용현황과 특히 공정 및 품질관리 모듈에 대해 현장 실무자 면담을 하여 면밀하게 문제점을 파악하였다. 이를 바탕으로 기본입력양식, 파생양식, 정보항목분석양식으로 이루어진 통합양식체계를 엑셀 프로그램기반으로 개발하였다. 본 연구를 통해 PMIS에서의 현장사용자들에 대한 정보공유 및 의사소통을 개선하여 향후 공사 전체에 대한 공기단축 및 품질향상에 기여할 수 있을 것으로 기대한다.

• 대한전기학회논문지
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• 제41권8호
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• pp.902-913
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• 1992

There have been several control schemes for the single input systems with unmeasurable state variables using variable structure control(VSC) theory. In the previous VSC, the systems must be represented in phase canonical form and the complete measurements for each state variable must be assumed. In order to eliminate these restrictions several VSC methods were proposed. And especially for the systems in phase canonical form with unmeasurable state variables, the reduced order switching function algorithm was proposed. But this method has many drawbacks and can not be used in the case of general form (not phase canonical form) dynamic system. Therefore this paper propose new construction method of switching fuction for the systems in phase canonical form, which reduce the restriction of reduced order switching function algorithm. And this algorithm can be realized for any state representation and adopted in the systems where not all states are available for switching function synthesis or control.

• International Journal of Contents
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• 제1권1호
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• pp.35-39
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• 2005

This research employs the intelligent application form agent to help people to locate the information they would want from Internet quickly. Based on Internet GUI environment, this user-friendly online application form program uses the agent concept to provide the customized, individual information to the users who registered their application form answers, to the extent of increasing the interest and participation of users. The system helps along with the decision making process, by quickening the information gathering process.

• 한국생산제조학회지
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• 제9권3호
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• pp.111-122
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• 2000

It is difficult to make shape library for featrue-based modeling because free-form surface is various shaped complicated To make modeling using similar shape feature-based model is easy and fast. Recently RE(Reverse Engineering) technolo-gy is very convenient method to get free-form surface. This study develops surface editor which makes surface modeling to manipulate control points and this study We study on the effective model data management using database system.

• 대한전자공학회논문지
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• 제13권5호
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• pp.30-34
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• 1976

24개의 기본요소를 가지고 2-7개 요소로서 한 문자를 구성하는 한글 data의 연속입력으로부터 space code없이 단음절을 자동식별하는 한 system을 제안한다. 3천여자의 한글을 30종의 form으로 form화하고, 그들 form에 대한 7개의 form 특징과 문자구간을 검출하여 단음절을 식별한다. 그 결과 연속입력되는 한글 data의 처리에서 음절분리용 space code를 사용했을 때와 비교하여 컴퓨터의 기억용량이 약 25% 절감되고 처리속도가 약 30% 향상된다.

• International Journal of Precision Engineering and Manufacturing
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• 제4권4호
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• pp.57-63
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• 2003

Machining information such as form accuracy and surface roughness is an important factor for manufacturing precise parts. To this regard, OMM (On the Machine Measurement) has been researched for last several decades to alternate CMM (Coordinate Measurement Machine) process. In this research, the OMM system with a laser displacement sensor was developed for measuring form accuracy and surface roughness of the machined workpiece on the machine tool. The surface roughness was estimated comparing the sensory signal with the reference data measured from master specimen. Also, form accuracy was determined from the moving averaged raw data. In addition, the geometric error map constructed beforehand using the geometric errors of the machine tool was used to compensate the obtained form accuracy. The overall performance was compared with CMM result, and verified the feasibility of the measurement system.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.708-709
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• 2015

In Korea, a series of noise-reduced aluminum forms are being recently used in apartment housing construction. However, their complicated and time-consuming work processes, and the noise which is still generated due to the inherent property of aluminum when especially installing and dismantling them are have been pointed out as a problem to be certainly solved for increasing their practical use in construction sites. The primary objectives of this study are to propose a conceptual design of a newly designed noise-reduced aluminum form in which the noise can be enormously decreased during form works. The conceptual design in this study improved problems of conventional system aluminum forms, and, later, a system aluminum form developed based on this conceptual design will be able to ensure noise-reduction and safety as well as excellent applicability.