• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.180-180
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• 2000

The shape of cold strip for the stainless process has been become issue in quality recently, and hence POSCO (Pohang Iron & Steel Co., Ltd) developed an automatic control system for strip shape in the sendzimir mill. The strip shape is measured by an outward measuring roll and is controlled by As_U roll and first intermediate roll. As_U roll consists of 8 saddles, which are controlled vertically. The fist intermediate rolls, which are controlled horizontally, consist of two pairs of rolls up and down. A developed shape control system is applied to real plant by using fuzzy logic and neural network method to control actuators; As_U roll and first intermediate roll. This system composes mainly of three parts as a real-time system, input to output conditioner board, and man-machine interface. The actual shape is recognized by neural network and converted into symmetric shape. The fuzzy controller, based on the shape from neural network and sensor, controls positions of the As_U roll and first intermediate roll. This paper verifies the shape controller performance. The experiments are made on line for the sendzimir mill. The shape control performance shows very efficient for the target tracking, shape symmetry, and fluctuation of shape.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2001.04a
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• pp.110-118
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• 2001

In many areas of finite element analysis, elements with special properties are required to achieve maximal accuracy. As examples, we may mention infinite elements for the representation of spatial domain that extend to special and singular elements for modeling point and line singularities engendered by geomeric features such as reentrant corners and cracks. In this paper, we study on modified shape function representing singular properties and algorigthm for the pollution adaptive mesh generation. We will also show that the modified shape function reduces pollution error and local error.

• Progress in Superconductivity and Cryogenics
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• v.4 no.2
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• pp.11-15
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• 2002

High speed probe for measurement of sin91e flux quantum circuits is comprised of coaxial cables and microstrip lines in order to carry high speed signals without loss. For the impedance matching between coaxial cable and microstrip line, we have determined the dimension of the microstrip line with 50${\Omega}$ impedance by simulation and then have investigated the effect of line width and cross-sectional shape of signal line, dielectric material, thickness of soldering lead at the coaxial-to-microstrip transition Point, and the an91c between dielectric material and end part of the signal line on the characteristics of signal transmission of the microstrip line. From the simulation, we have found that these all parameter's had influenced on the characteristic of signal transmission on the microstrip line and should be reflected in fabricating high speed probe, We have also determined the dimension of coplanar waveguide to fabricate testing sample for performance test of high speed probe.

• Journal of the Korean Society for Railway
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• v.14 no.6
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• pp.569-574
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• 2011

An effective approach to distributing budget to railway line facility improvement is to use investment priorities of railway line segments based on their deterioration. In this paper we present an evaluation method of railway line segment deterioration which can be used to distribute limited budget. Railway line facilities include rail track, railroad switch, subgrade, bridge, tunnel. These facilities and line shape can affect line segment deterioration. Deterioration evaluation method we present is a weighted sum of each component deterioration scores. The component weight can be obtained from experts using analytic hierarchy process.

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.4
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• pp.29-36
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• 2002

In this paper, a new edge detection method for area images is presented based on the scan-line image segmentation technology. The existing algorithms are lack of precision in its detections due to the noise factors such as depth perception and illumination problems when processing the 3D image into a 2D image. The general process of applying the scan-line method is to extract straight line components to determine the shape of the objects. However, we implement this method to an arc curve for precise detections. the paper proved precise detections that from off line to on line.

• Journal of the Korean Society of Costume
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• v.52 no.6
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• pp.1-13
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• 2002

This paper investigated the costumes of young girl dancers in Yon wha dae moo(연화대무: Lotus Stage dance) which were documented on the Ak-hak-guae-bum(악학궤범: Protocol of music) and the Jin-yeon-eui-guae(진연의궤: Archives of Royal Feast). The fashion of the costumes can be changed into three phases, based mainly on the changes of Hap-rip(합립: silk hat), Dan-eui(단의: long jacket) and Sang(상: apron type skirt). In the first phase the costume consisted of Hap-rip, round neck-line Dan-eui and tiered skirt decorated with pleat and Yu-so(유소: decorated cords). In the second phase. it consisted of Hap-rip, v-shape neck-line Dan-eui and skirt without pleat. In the third phase, it consisted of Yeon-wha-gwan(연화관: Lotus shape cap), round neck-line Dan-eui of later era and skirt with pleat and Yu-so. Yon-wha-dae dance appears to be adopted from Ja-ji-mu( 자지무: chinese dance) that originated in West and Central Asia. In both dances. young girl dancers danced mainly jump and spin. The costume of round neck-line Dan-eui seems to have been affected by the fashion in Dang Dynasty when young girls loved to wear Dan-ryung(단령: male coat with round neckline). And it satisfied the need of mobility for the dance which was Performed mainly with jump.

• Journal of the Korean Vacuum Society
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• v.6 no.4
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• pp.314-320
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• 1997

A chemical reaction and electronic structure change at the interface between copper and titanium nitride were investigated by XPS. A thin Cu layer was deposited on a TiN substrate oxidized by exposure to air at room temperature. We observed the Ti(2p), O(1s), N(1s), Cu(2p) core-level, and Cu LMM Auger line spectra. With increasing of the thickness of Cu layer, these spectra do not show any changes in the line shape as well as in peak position. In addition, the valence band spectra in XPS do not show any changes, which indicates that Cu does not react with Ti, N, and O. This inreactivity of Cu might cause a poor adhesion between Cu and TiN.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.24 no.4
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• pp.455-462
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• 2015

A feature line is a visually noticeable creased line on outer automotive panels. Feature lines play an important role in creating a good impression of a car. Even though the manufacturing quality of feature lines is important, it is difficult to achieve the designed shape owing to the springback of sheet metal. The current study presents five methods of making samples that will be used in a visual experiment to discover a quality control quantitative manufacturing allowance for feature lines. Measurement and inspection methods for the samples are also presented. The results show that plunge machining is the most accurate way to make the desired shape, and that wrapping the machined surface with sheet film is an appropriate way to emulate the roughness and visual texture of the painted outer panels of a car.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2009.04a
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• pp.15-17
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• 2009

The line simplification method based on the turning function is studied in this paper for conversion of ground plan data to geospatial data to update the digital map. This method eliminate vertices effectively by estimating the length and the angle between the vertices based on the turning function which is useful to express the shape of linear feature. As the result, this method shows high shape similarity, high elimination rate of vertices and 100% of satisfaction degree to the drawing rules. Thus this line simplification method is judged to be effective in updating the digital map with ground plans.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.4D
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• pp.555-561
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• 2009

In lieu of section profile data, a fitting of the bored tunnel shape is more significant confirmation for maintenance of a tunnel. Before the permit on the completion of a tunnel, deformation of the completed tunnel with respect to the design model are considered. And deformation can be produced at continuously along the entire of the tunnel section. This study firstly includes an analysis of algebraic approach and test it with an observed field data. And then a number of methods, line search method, genetic algorithm, and pattern search methods, are compared with the 3D tunnel shape fitting. Algebraic methods can solve a simple circular cylinder type as like a railway tunnel. However, a more complex model (compound circular curve and non circular) as like a highway tunnel has to be solved with soft computing tools in the cause of conditional constraints. The genetic algorithm and pattern search methods are computationally more intensive, but they are more flexible at a complex condition. The line search method is fastest, but it needs a narrow bounds of the initial values.