네트워크 기반의 GPS 반송파 상대측위 정확도 향상

이용욱,배경호 대한공간정보학회 2007 Spatial Information Research Vol.15 No.2

The GPS positioning offer 3D position using code and carrier phasemeasurements, but the user can obtain the precise acuracy positioning using carrier phase in대한측량협회 측량정보기술연구원 책임연구원 공학박사* ,대한측량협회 측량정보기술연구원 선임연구원 공학박사** ,이용욱 배경호112Real Time Kinematic(RTK). The main problem, which RTK have to vercome, is thenecessary to have a reference station(RS) when using RTK should be generally no more than10km on average, which is ignificantly diferent from DGPS, where distances to RS canexceed several hundred kilometers. The accuracy of today's RTK is limited by the distancedependent erors from orbit, ionosphere and troposphere as wel as station dependent influenceslike multipath and antena phase center variations.For these reasons, the author proposes Network based GPS Carrier Phase DiferentialPositioning using Multiple RS which is detached from user eceiver about 30km. An importantpart of the proposed system is algorithm and software development, named DAUNet. Themain proces is corrections computation, corrections interpolation and searching for the integerambiguity. Corrections computation of satellite by satellite and epoch by epoch at eachreference station are calculated by a Functional model and Stochastic model based on a linearcombination algorithm and corrections interpolation at user eceiver are used by area correctionparameters. As results, the users can obtain the cm-level positioning. GPS의 3차원 위치결정은 코드파와 반송파를 이용한다. 하지만 이동체에 대한 cm수준의 정확도를 획득하기 위해서는 정확한 기지점의 성과를 이용한 GPS 반송파 상대측위,즉RTK-GPS기법을 수행하여야 한다.이 때 두 대의 수신기 사이의 거리가 증가할수록 기선장에 따른 오차가 증가하여 기준국과 사용자 수신기의 거리를 10~20km 정도로 제한하고 있다. 따라서 사용자는 깊은 내륙, 연안 해역 등과 같은 기준국과 이동체의 이격이 수십 km로 증대되는 지역에서는 기준국 설치의 문제를 포함하 고 있으며 독자적인 기준국을 설치하여야 하는 인력 및 장비의 부담을 가지게 된다. 이를 극복하기 위해 본 연구에서는 네트워크 기반의 GPS 반송파 상대측위 방식을 제안하였으며 GPS 네트워크 처리 프로그램인 DAUNet을 개발하였다. 기선장에 따른 오차보정량 산출을 위해 선형보간알고리즘 방식에 기반한 함수모델과 통계모델을 제시하였으며,오차보정량의 보간은 면보정매개변수 방식을 제안하였다.기존 단일기준국 방식은 기선장에 따른 오차를 소거하지 못하였지만 본 연구에서는 사용자 수신기 와 평균 30km 떨어진 3대의 기준국을 이용하여 기선장에 따른 오차보정량을 소거 혹은 감소시킬 수 있었다.따라서 사용자는 네트워크 기반의GPS 반송파 상대측위 방식을 이용하여 이동체에 대한 10cm 이하 수준의 정확도를 획득할 수 있었다.

녹색건축물 정책방향 및 대응방안

이용욱,이용욱 대한설비공학회 2012 설비저널 Vol.41 No.3

식품접객업소의 위생개선을 위한 검사항목 개발과 활용에 관한 연구 : HACCP 모델을 이용한 기여인자 분석방법으로 Hazard Analysis Critical Control Point ( HACCP ) Model

이용욱,홍종해 한국식품위생안전성학회 1992 한국식품위생안전성학회지 Vol.7 No.2

The sanitation inspection is the most frequently used procedure to protect foods prepared in foodservice establishments. In order to enhance foodservice inspections and to improve post-inspection remedial measures, more practical evaluation methods for sanitation are required. The HACCP approach is based upon factors which contribute to foodborne disease rather than on factors which relate to aesthetics. Contributing factors for foodborne disease from foodservice establishments reported in USA, Canada, and England were analyzed to identify potential hazards during practical foodservice operations. Hazards were classified at critical control points by risk ranking. Twenty-two observable practical indicators relating to each contributing factor were selected and adjusted to standardized procedures and hazard determiners at critical control points. The weights for each inspection item were ranked as 1, 2, 3, 4 or 5 according to the risk level of contributing factors. And also application for the inspection item in different 6 types of work procedures was suggested for the use of specialized foodservice establishment and cafeteria, and of manager's self inspection in each establishment.

시스템공학 프로세스 적용 사례 발표-함정 전투 체계

이용욱,Lee, Yong-Uk 한국시스템엔지니어링협회 2004 시스템엔지니어링워크숍 Vol.3 No.-

오지리파 경제학에 대한 재인식

李容旭 영남대학교 산경연구소 1998 영상저널 Vol.6 No.-

An Off-Lattice Monte Carlo Simulation of Hyperbranched Polymers. 6. Effect of Chain Rigidity on the Microstructures

이용욱,조원호 한국고분자학회 2001 한국고분자학회 학술대회 연구논문 초록집 Vol.2001 No.4

구내신연장치를 이용한 치조골증대술 후 임프란트 매식 : 치험 5예 REPORT OF 5 CASES

이용욱,박충열,송종운,박홍주,김영운,오희균,유선열 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.2

Successful alveolar ridge augmentation by distraction osteogenesis method has been reported previously. There are several types of devices for alveolar ridge augmentation. In this paper, a new intraoral distraction device was used on the severe atrophic mandible in order to distract an alveolar ridge vertically in 5 patients. Mean amount of distracted alveolar ridge was 7.4㎜ (5∼9.5㎜). Dental implants were placed in the distracted alveolar bone and good osseointegration was obtained in all patients. Mean follow up period is 2years 6months (7months∼4years 9months). No complications, such as infection or resorption was observed in all patients. Alveolar ridge augmentation by gradual distraction seems to be a safe, simple and reliable procedure.

우수식품지정제도 실시에 대한 소고

이용욱 한국식품산업협회 1972 좋은식품 Vol.9 No.-

중국 元代청화자기 문양방식에 나타난 蒙古적 요소

이용욱,장정란 한국도자학회 2012 한국도자학연구 Vol.9 No.2

ThisstudyisonMongolianinfluenceinChineseblueandwhitewaremadewhenChinawas beingruledbyMongolia,theWondynasty.Therehadbeenanew trendinChinesepottery duringtheperiod.Itwastheappearanceofwhiteporcelainandofcobaltbluepaintingson whiteporcelain.Meanwhile,thecentralgovernmentfoundedapotteryfactoryatJingdezhenin Jiangsuintheinterestofmassproduction,andsentasuperintendentthere.IntheSong dynasty,celadonandwhiteporcelainweremadeonlywithraddle,butintheage,raddlebegan tobemixedwithkaolininthepottery makingprocess.Themixtureofraddleandkaolin,namely‘dualmixture’,madeitpossibletoproduceharderandwhiterporcelain.Inthecaseof blueandwhiteware,picturesaredrawnonthewhiteearthenbodybyuseofcobalt,and then itisbakedat1300degreesafterbeingcoveredwithclearoil.Blueandwhitewareisthemost significantpotteryintheWondynasty,becauseithasnew patternanddesignthathadnot beenseenbeforethen. Inthosedayscobaltwasimportedfrom WestAsiaandwascalled‘sumaliqing.’Theword ‘sumali’meansSamarrainIraq,forthecobaltwasimportedthere.However,thereisno materialorrecordtoexplainwhyblueandwhitewarewasmade.Inthisregard,itispresumed thatpottersinMongoliaandWestAsiancountriesmightactivelyinteractwitheachother inasmuchasMongoliawasrulingWestAsiancountriesinthosedaysandtheywereactively makingculturalexchangesuntilthe13thcentury. Atfirst,ChineseblueandwhitewaremadeduringtheWondynasty(hereinafterreferredtoas “theblue-whiteporcelain”)waspreferredbytheupperclassesinWestAsiancountries,butwith export,itnaturallyspreadovermanyAsiancountries.Approximately300piecesofthe blue-whiteporcelainareextant,about100ofwhichareinTurkey,IranandIraq. MongolianculturehadbeeninfluencedbyHan,JiangandIslam.Itsgeometricandschematic patternsmightbefrom Islamicculture.Blueandwhiteware,madebetween13thand14th centurieswhenMongoliawasmakingactiveexchangeswithWestAsiancountries,islikelyto beajointworkofMongoliancultureandIslamicone.Itspatternsimplyitthoughitis problematictobegthequestionduetotheabsenceofmaterialsandrecords. ThisstudywasmotivatedbyaquestionaboutwhatChinesehistoriansconsidertheblue-white porcelainastheirs.Thereareseveraldifferencesbetweentheblue-whiteporcelainandprevious Chinesepottery.First,ittendedtobebiggerthanpreviousones,whichisassociatedwith what thenomadwereusinglargepottery.Second,patternsweresystemicallydesigned.Third,the blue-whiteporcelainstandardizedblueandwhitewaremadeinWestAsiaandEurope. Specifically,Chinesepotterywasknownallovertheworldthankstotheblue-whiteporcelain,andasaresultblueandwhitewarecouldbeatitsheightbetweentheMingandQing dynasties. Nevertheless,MongolianinfluenceinChinesepotteryhasbeenunderestimated,andmoreover therehavebeennostudiesonit.InrecenttimesKoreahasestablishedanacademictiewith Mongolia,andthusithasbeenonanopeningstage.Asthecasestands,thisstudywas confinedtotheblue-whiteporcelaininexistence.Thereistheneedtoconductafurtherstudy onMongolianculture.Thisstudyissignificantinthesensethatithasintroducedasubjectto notice.

寡占價格의 硬直性에 對한 理論的解明 : Krelle의 均衡領域解에 對한 硏究

李容旭 대구효성가톨릭대학교 1974 연구논문집 Vol.14 No.1