• 제목/요약/키워드: Engine Information System

검색결과 1,110건 처리시간 0.035초

추론엔진을 활용한 웹서비스 기반 추천 시스템 (Web Service based Recommendation System using Inference Engine)

  • 김성태;박수민;양정진
    • 지능정보연구
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    • 제10권3호
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    • pp.59-72
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    • 2004
  • 인터넷의 활용범위는 정보의 검색 및 수집을 넘어서 여러 범위로 확대되고 있고 정보의 양 또한 방대해졌다. 그러나 필요한 정보를 찾기는 더욱 어려워지고 있고, 그에 따라 개인에게 맞는 정보를 제공해주는 시스템이 절실해지고 있다. 본 연구에서는 웹 서비스 기반위에 추론엔진을 사용하여 사용자에게 가장 적합한 상품을 검색하여 추천해주는 추천 시스템의 모델을 제시하고 있다. 현재의 웹 애플리케이션이 사용자에게 필요한 서비스를 제공하는데 비하여 애플리케이션마다 상이한 플랫폼의 구조와 분산된 환경에서 객체간의 통신을 쉽게 하고 통일된 개발을 위해 표준이 필요하게 되었다. 웹 서비스는 프로그램 언어에 독립적이고 상호 운용적 환경을 제공하기 위한 것으로 네트워크를 통해 기술하고 배포하여 실행시킬 수 있는 모듈화된 애플리케이션을 의미한다. 본 논문은 웹 서비스 기반위에 시스템을 구축함으로써 표준 웹 서비스의 실현 가능성을 가늠하고, 추론엔진과 결합하여 사용자의 정보와 변화하는 성향을 토대로 필요한 정보를 예측하여 추천하는 추천시스템 개발에 중점을 둔다.

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검색 효과성에 영향을 미치는 시맨틱웹 검색시스템 품질요인에 관한 연구 (Quality Dimensions Affecting the Effectiveness of a Semantic-Web Search Engine)

  • 한동일;홍일유
    • Asia pacific journal of information systems
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    • 제19권1호
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    • pp.1-31
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    • 2009
  • This paper empirically examines factors that potentially influence the success of a Web-based semantic search engine. A research model has been proposed that shows the impact of quality-related factors upon the effectiveness of a semantic search engine, based on DeLone and McLean's(2003) information systems success model. An empirical study has been conducted to test hypotheses formulated around the research model, and statistical methods were applied to analyze gathered data and draw conclusions. Implications for academics and practitioners are offered based on the findings of the study. The proposed model includes three quality dimensions of a Web-based semantic search engine-namely, information quality, system quality and service quality. These three dimensions each have measures designed to collectively assess the respective dimension. The model is intended to examine the relationship between measures of these quality dimensions and measures of two dependent constructs, including individuals' net benefit and user satisfaction. Individuals' net benefit was measured by the extent to which the user's information needs were adequately met, whereas user satisfaction was measured by a combination of the perceived satisfaction with search results and the perceived satisfaction with the overall system. A total of 23 hypotheses have been formulated around the model, and a questionnaire survey has been conducted using a functional semantic search website created by KT and Hakia, so as to collect data to validate the model. Copies of a questionnaire form were handed out in person to 160 research associates and employees working in the area of designing and developing semantic search engines. Those who received the form, 148 respondents returned valid responses. The survey form asked respondents to use the given website to answer questions concerning the system. The results of the empirical study have indicated that, of the three quality dimensions, information quality was found to have the strongest association with the effectiveness of a Web-based semantic search engine. This finding is consistent with the observation in the literature that the aspects of the information quality should serve as a basis for evaluating the search outcomes from a semantic search engine. Measures under the information quality dimension that have a positive effect on informational gratification and user satisfaction were found to be recall and currency. Under the system quality dimension, response time and interactivity, were positively related to informational gratification. On the other hand, only one measure under the service quality dimension, reliability was found to have a positive relationship with user satisfaction. The results were based on the seven hypotheses that have been accepted. One may wonder why 15 out of the 23 hypotheses have been rejected and question the theoretical soundness of the model. However, the correlations between independent variables and dependent variables came out to be fairly high. This suggests that the structural equation model yielded results inconsistent with those of coefficient analysis, because the structural equation model intends to examine the relationship among independent variables as well as the relationship between independent variables and dependent variables. The findings offer some useful implications for owners of a semantic search engine, as far as the design and maintenance of the website is concerned. First, the system should be designed to respond to the user's query as fast as possible. Also it should be designed to support the search process by recommending, revising, and choosing a search query, so as to maximize users' interactions with the system. Second, the system should present search results with maximum recall and currency to effectively meet the users' expectations. Third, it should be capable of providing online services in a reliable and trustworthy manner. Finally, effective increase in user satisfaction requires the improvement of quality factors associated with a semantic search engine, which would in turn help increase the informational gratification for users. The proposed model can serve as a useful framework for measuring the success of a Web-based semantic search engine. Applying the search engine success framework to the measurement of search engine effectiveness has the potential to provide an outline of what areas of a semantic search engine needs improvement, in order to better meet information needs of users. Further research will be needed to make this idea a reality.

고객중심의 과학기술정보 서비스를 위한 FAST 검색엔진 커스터마이징 (FAST Search Engine Customizing for S&T Information Service)

  • 한희준;이태석;김선태;예용희;이상기;여일연
    • 한국콘텐츠학회:학술대회논문집
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    • 한국콘텐츠학회 2008년도 춘계 종합학술대회 논문집
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    • pp.480-483
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    • 2008
  • 다양한 인터넷 기술이 개발 및 발전됨에 따라 정보 제공자는 사용자에게 보다 효율적이고 고객중심의 서비스를 제공하기 위해 노력하고 있다. 특히 방대한 양의 정보에 대하여 고객이 원하는 정보를 정확하고 쉽게 제공하기 위해서는 검색기능의 효율성이 필수이다. 한국과학기술정보연구원(KISTI)에서는 국가과학기술포털서비스 성능향상을 위하여 FAST(Fast Search & Transfer ASA) 검색엔진을 도입하였다. 하지만 무엇보다도 서비스 환경에 적합하게 검색엔진의 하드웨어 및 소프트웨어적 성능을 최적화하는 것이 중요하다. 본 논문에서는 국가과학기술정보의 효율적 서비스를 위한 FAST 검색엔진 설계 및 최적화 기법에 대해 논한다.

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다중 전달함수합성법을 이용한 승용차 엔진마운트 시스템의 최적설계 (Optimization of an Engine Mount System of passenger Car using the Multi-domain FRF-based Substructuring Method)

  • 이두호;황우석
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 춘계학술대회논문집
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    • pp.399-404
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    • 2002
  • Analyzing acoustic-structural systems such as automobiles and aircraft the FRF-based substructuring method is one of the most powerful tools. In this paper, an optimization procedure far the engine mount system of passenger car has been presented using the design sensitivity analysis based on the multi-domain FRF-based substructuring formulation. The proposed method is applied to an optimization problem of the engine mount system, of which objective is to minimize the interior sound over the concerned rpm range. The design variables selected are the stiffnesses of the engine mounts and bushes. Plugging the gradient information calculated by the proposed method into nonlinear optimization software, we can obtain the optimal stiffnesses of the engine mounts and bushings through design iterations. The optimized interior noise in the passenger car shows that the proposed method is very useful in the realistic situation.

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WWW에서 데이터베이스와 검색엔진의 연동을 통한 SGML 검색시스템의 구현 (Implementation of SGML Retrieval System through Interoperability with Database and Search Engine based on WWW)

  • 김낙현;정수용;노명호
    • 한국전자거래학회:학술대회논문집
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    • 한국전자거래학회 1999년도 학술대회지 vol.2
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    • pp.575-586
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    • 1999
  • The advent of the Internet and the enormous increase in volume of electronically stored information (SGML, Image, Sound, etc.) has led to substantial work on IR(Information Retrieval). To service on the WWW, construction and retrieval technology of SGML, which is the fundamental standard data format for CALS/EC, is needed specially. Due to such a change, it becomes essential to change the existing paradigm of conventional information retrieval systems and to adopt new Internet service system with search engine, SGML browser and advanced Internet technology on WWW. KIPRIS(Korea Industrial Property Rights Information Service), which is the specialized and integrated Internet service systems in the field of industrial property rights information service, is trying to be a guide for our country to establish its technological competitiveness with providing the online service of high quality. The objective of the paper identifies features and technologies of KIPRIS IR(Information Retrieval) system based on WWW as follows. First, it describes the development background and process of KIPRIS. Second, it presents a fundamental technology that consists of IR(Information Retrieval) concept, BRS(Bibliographical Retrieval System) search engine, SGML implementation technologies and the Internet/WWW technologies. Third, it provides information about system configuration, architecture, and the features and characteristics of KIPRIS. Finally, the implemented KIPRIS system is introduced.

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한의학정보 검색엔진 개발을 위한 시소러스 연구 (A Study on the Thesaurus of Korean medical information for developing search engine)

  • 백유상
    • 대한한의학원전학회지
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    • 제19권1호통권32호
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    • pp.155-167
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    • 2006
  • From th Study on A Study on the Thesaurus of Korean medical information for developing search engine, the conclusion is as follow. Knowledge based information system consists of concepts, facts and relation. The final goal of developing the Knowledge based information system is to select, store and control the knowledge and information of Oriental Medicine. Considering limitation of organizing the knowledge system, it is difficult to realize complete basic system and application method. In order to work, it is necessary to combine experts in each part, for example Domain experts, Information and Knowledge engineer. Through the development of knowledge based information system, we can construct EMR(Electronic Medical Record) system in the near future, and it is possible to make semi-expert system. To make Knowledge based information system, we need to establish standards of information that make the distribution of Knowledge and information easily.

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엔진오일 유전상수 변화량 측정에 의한 엔진오일 품질 모니터링 시스템 개발 (Development of an Engine Oil Quality Monitoring System)

  • 전상명
    • Tribology and Lubricants
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    • 제27권3호
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    • pp.125-133
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    • 2011
  • The purpose of this study is to develop an engine oil quality monitoring system to warn the abnormal condition of engine oil. To do this, first of all, it is needed a personal controller development to measure the capacitance of a pre-developed engine oil deterioration detection sensor integrated with an oil filter. To measure the capacitance of engine oil in the sensor, it is used the way measuring the electric charging time in a capacitor by impressing DC volt. This method has merits on cost and signal stability. The measured capacitance is compensated by comparing with the one measured by an impedance analyzer. Also, using the dielectric constant gained by an impedance analyzer, the calculating equation of the dielectric constant of engine oil related with the currently developed sensor is decided. Then, the deterioration degree of engine oil is estimated according to the change rate of dielectric constant between green oil and used oil. Finally, using this dielectric constant information together with engine oil temperature and pressure, the currently developed engine oil quality monitoring system is to tell the abnormal state of engine oil.

Empty space BSP트리를 이용한 3D 게임 렌더링 엔진 설계 (3D Game Rendering Engine Degine using Empty space BSP tree)

  • 김학란;박화진
    • 한국컴퓨터정보학회논문지
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    • 제10권3호
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    • pp.345-352
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    • 2005
  • 본 논문에서는 실시간 3차원 온라인 게임을 위한 게임 렌더링 엔진을 설계하고자 한다. 기존에 렌더링 속도를 높이기 위하여 대표적으로 퀘이크 엔진에서는 공간분할을 위해 BSP트리를 사용하였다. 국내에서도 급격히 증가하고 있는 3D온라인 게임을 개발하기 위한 게임엔진이 필요하다. 현재는 고사양의 하드웨어 가속기 개발로 인해 렌더링 시간을 단축시키고 있지만 아직도 저 사양의 시스템을 사용하고 있는 게임 업체에서도 사용 가능한 소프트웨어적인 렌더링 시간 단축을 위한 엔진의 개발이 여전히 요구되고 있다. 따라서 Empty space BSP트리를 이용하여 PVS look-up테이블을 구축하여 렌더링 시간을 줄인 게임엔진을 설계하고 구현하였다.

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Construction of Indoor and Outdoor Spatial Information Integration Service System based on Vector Model

  • Kim, Jun Hyun;Kwon, Kee Wook
    • 한국측량학회지
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    • 제36권3호
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    • pp.185-196
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    • 2018
  • In order to overcome the problem that outdoor and indoor spatial information service are separately utilized, an integration service system of spatial information that is linked from outdoor to indoor has been implemented. As a result of the study, "0001.xml" corresponding to the file index key value, which is the service connection information in the building information of the destination, was extracted from the prototype verification of the system, the search word of 'Kim AB' was transmitted to the indoor map server and converted from the outdoor map service to the indoor map service through confirmation of the navigation service connected information, using service linkage information and search words of the indoor map service was confirmed that the route was displayed from the entrance of the building to the destination in the building through the linkage search DB (Database) table and the search query. Therefore, through this study was examined the possibility of linking indoor and outdoor DB through vector spatial information integration service system. The indoor map and the map engine were implemented based on the same vector map format as the outdoor map engine, it was confirmed that the connectivity of the map engine can be applied.

주성분 분석(PCA)에 의한 항공기 왕복 엔진의 구조 건전도 모니터링 (Structural Health Monitoring of Aircraft Reciprocating Engine Based on Principal Component Analysis (PCA))

  • 김지환;박성은;이형철
    • 항공우주시스템공학회지
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    • 제6권1호
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    • pp.13-18
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    • 2012
  • This paper presents a structural health monitoring method of aircraft reciprocating engine using Principal Component Analysis (PCA) which analyzes vibration expressed by Averaged Normalized Power Spectral Density (ANPSD). Because ANPSD of the rotating shaft is sensitive to the rotating speed, this paper proposes to use a post-processing method of ANPSD is used to reduce the sensitivity. The PCA extracts compressed information from the post-processed ANPSDs and the information means the difference between current and normal cases of the engine. The experimental results demonstrate the feasibility and effectiveness of the proposed method to detect abnormal cases of the engine.