• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.6
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• pp.1-16
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• 2023

Accurate traffic information prediction is considered to be one of the most important aspects of intelligent transport systems(ITS), as it can be used to guide users of transportation facilities to avoid congested routes. Various deep learning models have been developed for accurate traffic prediction. Recently, ensemble techniques have been utilized to combine the strengths and weaknesses of various models in various ways to improve prediction accuracy and stability. Therefore, in this study, we developed and evaluated a traffic information prediction model using various deep learning models, and evaluated the performance of the developed deep learning models as a stacking ensemble. The individual models showed error rates within 10% for traffic volume prediction and 3% for speed prediction. The ensemble model showed higher accuracy compared to other models when no cross-validation was performed, and when cross-validation was performed, it showed a uniform error rate in long-term forecasting.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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• pp.12-14
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• 2000

XML[1]은 문서의 논리적인 구조를 가지고 있으며 XML 문서를 파싱할 때 이 구조에 맞는지 검증을 하게 된다. 이때 대부분 파서의 경우에는 문서 단위로 검증을 하며 문서의 일부분만 검증할 수 없다. 또한 XML 문서가 변경되었을 때 이 문서가 유효(valid)한지 검사할 때에도 문서 전체를 검증해야 한다. 이렇게 되면 검증할 필요가 없는 부분도 다시 검증하게 되는 오버헤드가 발생하는데 만약 XML 문서가 데이터베이스에 저장되어 있다면 문서 전체를 꺼내어서 검증하고 다시 삽입해야 한다. 본 논문에서는 이러한 문제점을 해결하기 위하여 XML 문서가 변경되었을 때 변경된 부분만 검증할 수 있는 기법을 제한한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.709-711
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• 2001

본 논문에서는 XML 문서에 문서검증을 위한 로직을 추가하였다 로직을 기술하기 위해 규칙 표현에 효과적인 Prolog를 이용하였고 검증 규칙을 XML 문서로 변환하여 원래의 XML 문서에 포함시켰다. XML 문서검증에 관한 연구가 기존에는 주로 문서 구조의 검증에 치중한 반면 본 논문은 XML 엘리먼트의 데이터 값 검증에 역점을 두었다. 또한 폼 값의 검증을 XML과 Prolog를 이용하여 검증함으로써 스크립트언어를 사용해 검증하는 일반적인 방법을 개선하였다.

• YAKHAK HOEJI
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• v.50 no.3
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• pp.154-159
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• 2006

For the increasing demand for the validation of analytical results, one of the important concerns of the analyst is to be assured that the instrumentation is working to qualified conditions. In this study, we have investigated and compared several validation guidelines of the performance verification of UV-VIS spectrophotometer used in pharmacopoeias of major countries and UV-VIS instrument analytical companies, and we proposed the practically useful validation guidelines of UV-VIS spectrophotometer. Based on our proposed validation guidelines of UV-VIS spectrophotometer, several UV-VIS spectrophotometers used in drug manufacturing laboratories were validated for their performances.

• Journal of the Korean Society for Precision Engineering
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• v.17 no.2
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• pp.114-120
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• 2000

Fossil power plant availability is significantly affected by gradual degradations of equipment as operation of the plant continues. It is quite important to determine whether or not to replace some equipment and when to replace the equipment. Performance calculation and analysis can provide the information. Robustness in the performance calculation can be increased by using verification ＆ validation of measured input data. We suggest new algorithm in which estimation relation for validated measurement can be obtained using correlation between measurements. Input estimation model is obtained using design data and acceptance measurement data of domestic 16 fossil power plant. The model consists of finding mostly correlated state variable in plant state and mapping relation based on the model and current state of power plant.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.27 no.1
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• pp.43-50
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• 2019

The aviation demand forecast field has been actively studied along with the recent growth of the aviation market. In this study, the demand for domestic passenger demand and freight demand was estimated through cross-validation method. As a result, passenger demand is influenced by private consumption growth rate, oil price, and exchange rate. Freight demand is affected by GDP per capita, private consumption growth rate, and oil price. In particular, passenger demand is characterized by temporary external shocks, and freight demand is more affected by economic variables than temporary shocks.

• Proceedings of the Korean Nuclear Society Conference
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• 2004.05a
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• pp.225.2-225.2
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• 2004

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.9C
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• pp.908-922
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• 2003

The Public Key Infrastructure (PKI) trends to delegate the certificate path processing to the Delegated Path Discovery (DPD) Server and Delegated Path Validation (DPV) server recently. The most critical factor for the selection of the delegated server is to allow the server to be equipped with a high reliability through a low cost, and simple implementation. In this paper, we propose a new certificate path processing scheme employed the trusted CA as the DPD/DPV server by adding the capability of the Validation Authority (VA) to the trusted CA. Since our proposed scheme uses the existing trusted CA as validation server, we can achieve a high trust through a simple implementation for the processing. Besides, we propose an additional scheme for reducing an overhead on the trusted CA. it is obtained by delegating digital signature verification to CAs on the path and by skipping the repeated path processing. As the result, our proposed validation scheme can be performed efficiently with high speed and low computational overhead.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.604-606
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• 2002

PKI에 필수적인 요소인 인증서 검증에 있어 인증서 검증서버인 ETRI/VA는 인증서의 상태 검증의 적시성을 제공하고 인증경로 생성 및 검증에 대한 클라이언트의 부담을 줄이며. PKI 상호연동을 지원하고 도메인간의 인중서 정책을 중앙집중 관리한다. 본 논문은 ETRI/VA에서의 신속하고 효율적인 인증경로 생성 방법을 제안하였다. 인중기관 인증서로 이루어진 인증경로를 미리 생성하고 저장하여 사용함으로써 검증 요청시 빠르게 인증경로를 생성할 수 있고. 요청에 의해 생성된 인증경로를 저장하여 이후 동일한 검증대상 인증서의 검증시 기 저장된 인증경로를 재사용하게 함으로써 효율적으로 인증경로를 생성한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.11a
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• pp.163-164
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• 2007