• 제목/요약/키워드: Driving pattern analysis

검색결과 126건 처리시간 0.025초

Forklift 운전자의 계기판 인지성에 따른 Visual object의 layout과 위치에 관한 분석 (Analysis about visual object's layout and position by forklift driver's instrument cognitivity)

  • 정우근;박범
    • 대한안전경영과학회지
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    • 제7권5호
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    • pp.97-105
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    • 2005
  • Achievement degree can be improved by display offering more effective process about cognitive, pattern recognition than making observers use memory, integration, and cognitive process of control. And this research is proved by several scholars' researches [4][5][7][9]. In this study, researches was conducted about cognition according to layout of object in instrument panel. To decide layout of instrument panel, Cognition value was preferentially decided about all location. And then, objects are arranged to correct position of low cognition following the inferior procedure about each location. As a result, we get conclusion that gauge location is taken in high importance order through mechanical importance degree bringing huge damage during driving forklift-truck.

친 경제 및 친 환경 운행을 위한 차량정보 분석에 관한 연구 (Analysis of The Vehicle Information for The Economical and Environmental Driving Pattern )

  • 최종우;윤대섭;권오천;김현숙
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2008년도 추계학술발표대회
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    • pp.652-655
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    • 2008
  • 차량 및 운전자를 효율적으로 관리하면 운행에 따른 연료소모량을 감소할 수 있으며 유류비를 줄이고 배출가스를 감소시켜 친 경제 및 친 환경 주행을 할 수 있다. 그러나 차량 및 운전자를 효율적으로 관리하기 위한 구체적인 정보가 부족하다. 따라서 본 연구에서는 실 차량에 차량 및 운전자 관리 시스템 단말을 설치하고 실제 주행 중에 수집된 차량 정보를 분석하여 연료소모에 관련된 요소들을 분석하였고, 친 경제 및 친 환경을 지원하기 위한 구체적인 가이드라인을 제안한다.

척수 손상 환자의 삶의 질 영향요인 분석 (Factors Effect on Quality of Life of Spinal Cord Injury Patients)

  • 신성례;김애리
    • 대한간호학회지
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    • 제31권1호
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    • pp.126-138
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    • 2001
  • The purpose of this study is to act nursing intervention strategies to promote quality of life (QOL) in Spinal Cord Injury patients. Therefore, the study is designed to evaluate religion, marital status, educational background economic status, level of injury, voiding pattern, transportation by driving, rehabilitation education, self-concept, sexual status, perceived barrier, powerlessness, depression, hope, social support, self-efficacy, anxiety, ADL, perceived hopelessness, personality and pain for QOL at the same time. It was gathered empirical data was collected using a self report questionnaire from 61 patients during a six month period after SCI at 5 general hospitals, at 2 rehabilitation centers and at 2 rehabilitation schools province from Jun. 18, 1999 through Sep. 28, 1999. The reliability of the 19 instruments was tested with Cronbach's alpha which ranged from .6319 to .9769. For the data analysis a SAS program was used for Pearson correlation coefficients, and stepwise multiple regression. The results were as follows; 1. The mean of total item score in the QOL scale was 2.814, which showed a much lower score than the cancer points. 2. There was a significant correlation between self concept, transportation by driving, perceived barrier, powerlessness, depression, hope, social support, self-efficacy, anxiety, ADL and QOL.(${\gamma}$= .27~-.79, p< .05) 3. Stepwise multiple regression analysis showed that; a) Depression was the main predictor of QOL and account for 53.7% of the variance in QOL. b) Hope, ecomic status and body satisfaction accounted for 8%, 4%, 3.4% respectively and these variables combined accounted for 69.2% of the variance in QOL. In conclusion, to begin with, it is important to reduce depression and to help for SCI points to inspire hope, economic status and body satisfaction. That will be short cut for nursing strategies to enhance QOL.

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주성분분석을 이용한 기종점 데이터의 압축 및 주요 패턴 도출에 관한 연구 (A Study on the Compression and Major Pattern Extraction Method of Origin-Destination Data with Principal Component Analysis)

  • 김정윤;탁세현;윤진원;여화수
    • 한국ITS학회 논문지
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    • 제19권4호
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    • pp.81-99
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    • 2020
  • 기종점 데이터는 수요 분석 및 서비스 설계를 위해서 대중교통, 도로운영 등 다양한 분야에서 저장 및 활용되고 있다. 최근 빅데이터의 활용성이 증대되면서 기종점 데이터의 분석 및 활용에 대한 수요도 함께 증가하고 있다. 기존의 일반적인 교통 정보 데이터가 수집장비 수(n)에 비례하여 데이터양이 증가(α·n)하는 것과는 다르게, 기종점 데이터는 수집지점 수(n)의 증가에 따라 수집 데이터의 양이 기하급수적으로 증가(α·n2)하는 경향이 있다. 이로 인하여 기종점 데이터를 원시 데이터의 형태로 장기간 저장하고 빅데이터 분석에 활용하는 것은 대용량의 저장 공간이 필요하다는 것을 고려할 때 실용적 대안으로 여겨지지 않고 있다. 이와 함께 기종점 데이터는 0~10 사이의 작은 수요 부분에 패턴화된 형태와 무작위 적인 형태의 데이터가 섞여있어 작은 수요가 그룹화되어 발생하는 주요 패턴을 추출하기에 어려움이 있다. 이러한 기종점 데이터의 저장용량의 한계와 패턴화 분석의 한계를 극복하고자 본 연구에서는 주성분 분석을 활용한 대중교통 기종점 데이터의 압축 및 분석 방법을 제안하였다. 본 연구에서는 서울시와 세종시의 대중교통 이용 데이터를 활용하여 모빌리티 데이터를 분석하고, 모빌리티 기종점 데이터에 포함된 무작위 성향이 높은 데이터를 제거하기 위해 주성분분석 기반의 데이터 압축 및 복원에 관한 연구를 수행하였다. 주성분분석으로 분해된 기종점 데이터와 원데이터를 비교하여 주요한 수요 패턴을 찾고 이를 통해 압축률과 복원율을 높일 수 있는 주성분 범위를 제안하였다. 본 연구에서 분석한 결과, 서울시 기준 1~80, 세종시 기준 1~60까지의 주성분을 사용할 경우 주요 이동 데이터의 손실 없이 기종점 데이터에 포함되어있는 노이즈를 제거하고 데이터를 압축 및 복원이 가능하였다.

Spatial Characteristics and Driving Forces of Cultivated Land Changes by Coupling Spatial Autocorrelation Model and Spatial-temporal Big Data

  • Hua, Wang;Yuxin, Zhu;Mengyu, Wang;Jiqiang, Niu;Xueye, Chen;Yang, Zhang
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제15권2호
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    • pp.767-785
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    • 2021
  • With the rapid development of information technology, it is now possible to analyze the spatial patterns of cultivated land and its evolution by combining GIS, geostatistical analysis models and spatiotemporal big data for the dynamic monitoring and management of cultivated land resources. The spatial pattern of cultivated land and its evolutionary patterns in Luoyang City, China from 2009 to 2019 were analyzed using spatial autocorrelation and spatial autoregressive models on the basis of GIS technology. It was found that: (1) the area of cultivated land in Luoyang decreased then increased between 2009 and 2019, with an overall increase of 0.43% in 2019 compared to 2009, with cultivated land being dominant in the overall landscape of Luoyang; (2) cultivated land holdings in Luoyang are highly spatially autocorrelated, with the 'high-high'-type area being concentrated in the border area directly north and northeast of Luoyang, while the 'low-low'-type area is concentrated in the south and in the municipal area of Luoyang, and being heavily influenced by topography and urbanization. The expansion determined during the study period mainly took place in the Luoyang City, with most of it being transferred from the 'high-low'-type area; (3) elevation, slope and industrial output values from analysis of the bivariate spatial autocorrelation and spatial autoregressive models of the drivers all had significant effects on the amount of cultivated land holdings, with elevation having a positive effect, and slope and industrial output having a negative effect.

고속도로 중앙분리대형 풍력발전 타당성 분석 - 차량 저항계수 관점에서 (Feasibility Analysis on Wind Turbine Embedded to Highway Median Strip - Consideration on Vehicle Drag Coefficient)

  • 윤성욱;전완호;김현구
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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    • pp.536-538
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    • 2009
  • In recent day, many people are interested in wind resource for generation of electric power. Especially, it is made assessment the possibility of generation of electric power by wind resource originated from running cars and buses in downtown or highway. Moreover bus, driven in the exclusive lane, is focused on possibility of generation electric power on highway because median strip makes fast flow way between bus body and median strip and a pattern will appear in the flow way like drag coefficient. But nobody can guess whether the induced flow will increase or decrease and estimate amount of change of drag coefficient. Solving drag coefficient of bus running highway is the point of this paper. To solve this problem, we use the CFD method. The model is a bus simplified without mirror and gates. In order to assess result, the flow analysis surrounding the bus on the flat road where median strip is not installed has been compared with road with median strip. Solving condition is that the driving highway and median strip are running with 100km/h (27.8m/s).

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유클리디언 거리 기반의 단계적 소거 방법을 통한 화학센서 어레이 성능 최적화 (A Step-wise Elimination Method Based on Euclidean Distance for Performance Optimization Regarding to Chemical Sensor Array)

  • 임해진;최장식;전진영;변형기
    • 센서학회지
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    • 제24권4호
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    • pp.258-263
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    • 2015
  • In order to prevent drink-driving by detecting concentration of alcohol from driver's exhale breath, twenty chemical sensors fabricated. The one of purposes for sensor array which consists of those sensors is to discriminate between target gas(alcohol) and interference gases($CH_3CH_2OH$, CO, NOx, Toluene, and Xylene). Wilks's lambda was presented to achieve above purpose and optimal sensors were selected using the method. In this paper, step-wise sensor elimination based on Euclidean distance was investigated for selecting optimal sensors and compared with a result of Wilks's lambda method. The selectivity and sensitivity of sensor array were used for comparing performance of sensor array as a result of two methods. The data acquired from selected sensor were analyzed by pattern analysis methods, principal component analysis and Sammon's mapping to analyze cluster tendency in the low space (2D). The sensor array by stepwise sensor elimination method had a better sensitivity and selectivity compared to a result of Wilks's lambda method.

A Destruction Pattern Analysis of a Turbo-Molecular Pump According to the Foreline Clamp Damage in an ICP Dry Etcher for 300 mm Wafers

  • Jeong, Jinyong;Lee, Intaek;Joo, Junghoon
    • Applied Science and Convergence Technology
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    • 제24권2호
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    • pp.27-32
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    • 2015
  • We analyzed the destruction patterns of a turbo-molecular pump (TMP) resulting from its sudden exposure of a foreline to the atmospheric pressure due to a destruction of the foreline connecting clamp of an ICP dry etcher for 300 mm wafers during high-vacuum operation ($5{\times}10^{-6}$ Torr). Unlike in the case of view port's breakage, the TMP's rotor module was crashed inside the chamber. The primary damage resulted from the collision of the blades and stators, and the secondary damage resulted from the breaking of the rotor - driving shaft assembly. The fixing screws of the rotor and axial shaft were bent and broken when the TMP controller output the maximum current even after the crash event. Electrical power consumption analysis of the TMP power controller confirmed it. The stress distributions were analyzed by a finite element method using CFD-ACE+ multi physics software. Rotating inertia of each parts and kinetic energies were calculated as well. 68% of the rotational kinetic energy is deposited by the rotor - shaft module.

Assessing the Performance of Pongamia pinnata (l.) Pierre under Ex-situ Condition in Karnataka

  • Divakara, Baragur Neelappa;Nikhitha, Chitradurga Umesh
    • Journal of Forest and Environmental Science
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    • 제38권1호
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    • pp.12-20
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    • 2022
  • Pongamia (Pongamia pinnata L.) as a source of non-edible oil, is potential tree species for biodiesel production. For several reasons, both technical and economical, the potential of P. pinnata is far from being realized. The exploitation of genetic diversity for crop improvement has been the major driving force for the exploration and ex situ/in situ conservation of plant genetic resources. However, P. pinnata improvement for high oil and seed production is not achieved because of unsystematic way of tree improvement. Performance of P. pinnata planted by Karnataka Forest Department was assessed based on yield potential by collecting 157 clones out of 264 clones established by Karnataka Forest Department research wing under different research circles/ranges. It was evident that the all the seed and pod traits were significantly different. Further, selection of superior germplasm based on oil and pod/seed parameters was achieved by application of Mahalanobis statistics and Tocher's technique. On the basis of D2 values for all possible 253 pairs of populations the 157 genotypes were grouped into 28 clusters. The clustering pattern showed that geographical diversity is not necessarily related to genetic diversity. Cluster means indicated a wide range of variation for all the pod and seed traits. The best cluster having total oil content of more than 34.9% with 100 seed weight of above 125 g viz. Cluster I, II, III, IX, XV, XIX, XXI, XXIII, XXVI and XXVII were selected for clonal propagation.

선박용 엔진 프레임 박스의 구조해석을 위한 기구학적 분석 (Kinematic Study for the Structural Analysis of the Frame Box of Vessel Engines)

  • 이재훈;최종호;조진래;이인수
    • 한국전산구조공학회논문집
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    • 제20권5호
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    • pp.565-572
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    • 2007
  • 본 논문에서는 S60MC-C 선박용 다실린더 엔진의 구조해석을 위한 기구학적인 분석에 대해 서술하였다. 구조해석을 위해 프레임박스에 작용하는 측력과 크랭크 저널베어링에 작용하는 반력이 필요하다. 각각의 동적인 작용력을 구하기 위해, 선박용 엔진 내부의 구동부를 마찰이 없는 평판의 운동으로 가정하고, 단실린더에 대해 동역학적인 평형관계를 이용하여 엔진 구동시의 크랭크 각도별 작용력을 구하였다. 단실린더에서의 하중조건을 바탕으로 특정 시점에서 각각의 실린더에 작용하는 하중을 구하기 위해 크랭크암의 각도의 차이를 이용하였다. 구조해석을 위해 프레임박스의 응력 변화에 큰 영향을 줄 것으로 판단되는 8개의 각도를 선정하였다.