• Title/Summary/Keyword: Preprocess

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USING MODIS DATA TO ESTIMATE THE SURFACE HEAT FLUXES OVER TAIWAN'S CHIAYI PLAIN

  • Ho, Han-Chieh;Liou, Yuei-An;Wang, Chuan-Sheng
    • Proceedings of the KSRS Conference
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    • 2008.10a
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    • pp.317-319
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    • 2008
  • Traditionally, it is measured by using basin or empirical formula with meteorology data, while it does not represent the evaportransporation over a regional area. With the advent of improved remote sensing technology, it becomes feasible to assess the ET over a regional scale. Firstly, the IMAGINE ATCOR atmospheric module is used to preprocess for the MODIS imagery. Then MODIS satellite images which have been corrected by radiation and geometry in conjunction with the in-situ surface meteorological measurement are used to estimate the surface heat fluxes such as soil heat flux, sensible heat flux, and latent heat flux. In addition, the correlation coefficient between the derived latent heat and the in-situ measurement is found to be over 0.76. In the future, we will continue to monitor the surface heat fluxes of paddy rice field in Chiayi area.

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A Study on Shield Wire Stripping of Micro Coaxial Cable for Medical Device Using Nd:YAG Laser (Nd:YAG 레이저를 이용한 의료기기용 마이크로 동축케이블의 실드선 탈피에 관한 연구)

  • Lee, Jeong-Wan;Kim, Jung-Hoon
    • Journal of Industrial Technology
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    • v.26 no.B
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    • pp.35-41
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    • 2006
  • Recently, as ultrasonic medical devices are gradually developed, many of those requires smaller and more precision coaxial cables in probe. So, the use of micro coaxial cable becomes an efficient solution for ultrasonic machine. However, there are many difficulties in stripping micro coaxial cable by traditional mechanical process. In this paper, we use the Nd-YAG laser for the efficient stripping of conduct wire of cable. We propose a new method to strip the shield wire of micro coaxial cable. Through some experiments, we found that there is a new possibility in the proposed method. Also, in order to enhance the performance, we propose a preprocess of the cable before stripping.

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Development of 3-D J-Integral Calculation Method for Structural Integrity Evaluation (기기 건전성 평가를 위한 3차원 J-적분 계산 전산코드 응용평가 연구)

  • Kim, Young-Jin
    • Proceedings of the KIEE Conference
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    • 1999.11b
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    • pp.450-454
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    • 1999
  • In order to evaluate the integrity of nuclear power plants, J-integral calculation is crucial. For this purpose, finite element method is popularly used to obtain J-integral. However, high cost time consuming preprocess should be performed to design the finite element model of a cracked structure. Also, the J-integral should be verified by alternative method since it may differ depending on the calculation method. The objective of this paper is to develop a three-dimensional elastic-plastic J-integral analysis system which is named as EPAS. The EPAS program consists of an automatic mesh generator for a through-wall crack and a surface crack, a solver based on ABAQUS program, and a J-integral calculation program which provides DI(Domain Integral) and EDI(Equivalent Domain Integral) based J-integral calculation. Using the EPAS program, an optimized finite element model for a cracked structure can be generated and corresponding J-integral can be obtained subsequently.

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Design and Implementation of GUI-based Preprocess for SIOP Simulator (SIOP 시뮬레이터를 위한 GUI 기반의 전처리부 설계 및 구현)

  • Lee, Yang-Min;Lee, Jae-Kee;Kang, Dong-Woo
    • Proceedings of the Korean Information Science Society Conference
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    • 2005.11b
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    • pp.586-588
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    • 2005
  • 전세계적으로 수자원이 고갈되어 가는 시점에서 해안에 근접한 지하수의 개발은 매우 중요하며, 현재 이와 관한 연구가 활발히 수행되고 있다. 해안 지하수를 개발하고 관리하기 위한 다양한 시뮬레이터가 존재하여, 많은 시뮬레이터들이 복잡하고 난해한 인터페이스로 인하여 시뮬레이션 생산성과 사용율이 낮은 편이다. 본 논문에서는 GUI에 기반한 사용자 편의 중심의 시뮬레이터 전처리부를 개발하였다. 특히 해안 지하수 개발 관리 시뮬레이터의 하나인 SIOP을 대상으로 하여 마우스 입력 중심의 전처리부를 개발하여 시뮬레이션 생산성과 사용 편의성을 증가 시켰다.

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Structural Strength Analysis and Static Load Test of a Wheelset of Korean High Speed Rail for Measuring Whee/Rail Force (한국형 고속철도차량의 차륜/궤도 작용력 측정을 위한 윤축의 구조강도 해석 및 정하중 시험)

  • 전응식;함영삼;허현무;강부병
    • Proceedings of the KSR Conference
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    • 2002.10b
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    • pp.898-903
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    • 2002
  • The railroad is a means of large transportation which has many talents such as a safety and a regularity. That is a results from various confidential performance tests and evaluations of the system. The railroad system consist of various subsystems - vehicle, power supply, signal, communications, track structures, operations, etc. Among them, as an item of safety evaluation there is a measurement of wheel/rail force, so called a measurement of derailment coefficient. This is a very important item because a derailment of a train will bring about a big accident. Especially it is more inportant in high speed rail of which operation speed is over two times as fast as existing rail. In this paper, it is introduced to preprocess the wheelset for measuring wheel/rail force of high speed rail, such as to treat a measuring wheelset, its finite element analysis, adhesion of strain gauges and static load test.

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The development on a recognition system of assembly parts using a hardware independent image module (하드웨어에 독립적인 영상모듈을 이용한 부품인식 시스템의 구현)

  • Ha, Seung-Suk;Park, Sang-Bum;Lee, Boo-Hyung;Han, Young-Joon;Hahn, Hern-Soo
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.969-970
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    • 2006
  • This paper develops a recognition system of assembly parts using a hardware independent image module. Using a shared memory, the image module consists of the image acquiring process and the image processing process. We preprocess an acquisition image from the module, approximate the image edges to an ellipse, and then recognize an assembly part by matching the ellipse to a model base one.

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Multi-view Image Generation by Depth Map Preprocessing (깊이영상의 전처리를 이용한 다시점 영상 생성 방법)

  • Lee, Sang-Beom;Kim, Sung-Yeol;Ho, Yo-Sung
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.697-698
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    • 2006
  • In this paper, we propose a new scheme to generate multi-view images using a depth-image-based rendering (DIBR) technique. In order to improve the quality of multi-view images at newly exposed areas during mesh-based rendering, we preprocess the depth map using a Gaussian smoothing filter. Previous algorithms apply a smoothing filter to the whole depth map even if the depth map is collapsed. After extracting objects from the depth map, we apply the smoothing filter to their boundaries. Finally, we cannot only maintain the depth quality, but also generate high quality multi-view images. Experimental results show that our proposed algorithm outperforms previous works and supports an efficient depth keying technique.

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P2P Group Search Algorithm based on Preprocessing Search (전처리 검색 기반의 P2P 그룹 검색 알고리즘)

  • Kim, Boon-Hee
    • The Journal of the Korea institute of electronic communication sciences
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    • v.5 no.5
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    • pp.522-527
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    • 2010
  • In the connected environment by network, clients shared resources as that requested the file that a server had, but P2P system is alternative because of the overload of servers. To improve the performance of this P2P system, we are studying about that. In this study, we can improve a usability for users using P2P search system, and suggest a group search algorithm based on a preprocessing search.

Finite Element Analysis and Static Load Test of a Wheelset of Gwangju EMU for Measuring Wheel/Rail Force (차륜/궤도 작용력 측정을 위한 광주전동차 윤축의 구조해석 및 정하중 시험)

  • Jeon Eung-Sik;Ham Young-Sam;Chung Woo-Jin
    • Proceedings of the KSR Conference
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    • 2003.05a
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    • pp.762-767
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    • 2003
  • The railroad is a means of large transportation which has many talents such as a safety and a regularity. That is a results from various confidential performance tests and evalutions of the system. The railroad system consist of various subsystems - vehicle, power spply, signal communications, track structures, operations, etc. Among them as an item of safety evaluation there is a measurement of wheel/rail force, so called a measurement of derailment coefficient. This is a very important item because a derailment of a train will bring about a big accident. Especially it is more important in high speed rail of which operation speed is over two times as fast as existing rail. In this paper, it is introduced to preprocess the wheelset for measuring wheel/rail force of Gwangiu EMU, such as to treat a measuring wheelset its finite element analysis, adhesion of strain gauges and static load test.

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Evaluation of running safety for korean high speed railway vehicle (한국형 고속철도차량의 주행안전성 평가)

  • Ham Young-Sam;Hur Hyun-Moo
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.316-321
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    • 2003
  • The railroad is a means of large transportation which has many talents such as a safety and a regularity. That is a results from various confidential performance tests and evaluations of the system. The railroad system consist of various subsystems - vehicle, power supply, signal, communications, track structures, operations, etc. Among them, as an item of safety evaluation there is a measurement of wheel/rail force, so called a measurement of derailment coefficient. This is a very important item because a derailment of a train will bring about a big accident. Especially it is more important in high speed rail of which operation speed is over two times as fast as existing rail. In this paper, it is introduced to preprocess the wheelset for measuring wheel/rail force of high speed rail, such as to treat a measuring wheelset, adhesion of strain gauges and static load test, running test result of main line.

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