• Title/Summary/Keyword: 분석이론

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A study on the Traffic characteristic and Performance analysis of network on Real-time running (실시간 운영중인 네트워크의 트래픽 특성과 성능분석에 관한 연구)

  • 김창호;진성호;김동일;최삼길
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 1998.11a
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    • pp.358-364
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    • 1998
  • 본 논문은 CincoNet사의 Netxray 3.0.1을 통해 실시간 운영중인 동의대학교 종합 정보통신망(DEUNET)의 성능을 분석하고 평가한다. 기존의 네트워크 성능분석이 모의실험이나 트래픽 이론을 통해 분석한 경우가 대부분이므로, 실제 운영중인 네트워크의 성능과는 많은 차이가 날 수 있다. 본 연구에서는 수식적인 이론전개를 통한 성능 분석보다는 실제적인 측정을 통해 교내 망의 시간별 이용률과 사용하는 프로토콜의 현황과 트래픽 특성을 정성적으로 접근하였으며, 교내망인 동의대학교 종합정보통신망(DEUNET)을 모델로 삼았다. 이러한 분석방법은 네트워크의 설계와 증설 및 고장수리에 아주 중요한 기초자료로 사용될 것이다.

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Beta Processes and Survival Analysis (베타과정과 베이지안 생존분석)

  • Kim, Yongdai;Chae, Minwoo
    • The Korean Journal of Applied Statistics
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    • v.27 no.6
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    • pp.891-907
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    • 2014
  • This article is concerned with one of the most important prior distributions for Bayesian analysis of survival and event history data, called Beta processes, proposed in Hjort (1990). We review the current state of the art of beta processes and their application to survival analysis. Relevant methodological and practical areas of research that we touch on relate to constructions, posterior distributions, large-sample properties, Bayesian computations, and mixtures of Beta processes.

A Review of the Development and Critique of Citation Analysis (인용분석의 발전과 그에 대한 비판)

  • Jung, Kyung-Hee
    • Journal of Information Management
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    • v.30 no.2
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    • pp.53-68
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    • 1999
  • This paper focuses on the critique of citation analysis and then attempts to prospect for the future. The development of citation analysis has been marked by the invention of new techniques and measures, the exploitation of new tools, and the needs of evaluation of scientific research. Normative theory takes the lead in this development. But critics have questioned both the assumptions and methods of citation analysis. This critics are based on the microsociological perspective.

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A Study on the Prediction Accuracy Bounds of Instruction Prefetching (명령어 선인출 예측 정확도의 한계에 관한 연구)

  • Kim, Seong-Baeg;Min, Sang-Lyul;Kim, Chong-Sang
    • Journal of KIISE:Computer Systems and Theory
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    • v.27 no.8
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    • pp.719-729
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    • 2000
  • Prefetching aims at reducing memory latency by fetching, in advance, data that are likely to be requested by the processor in a near future. The effectiveness of prefetching is determined by how accurate the prediction on the needed instructions and data is. Most previous studies on prefetching were limited to proposing a particular prefetch scheme and its performance evaluation, paying little attention to theoretical aspects of prefetching. This paper focuses on the theoretical aspects of instruction prefetching. For this purpose, we propose a clairvoyant prefetch model that makes use of perfect history information. Based on this theoretical model, we analyzed upper limits on the prefetch prediction accuracies of the SPEC benchmarks. The results show that the prefetch prediction accuracy is very high when there is no cache. However, as the size of the instruction cache increases, the prefetch prediction accuracy drops drastically. For example, in the case of the spice benchmark, the prefetch prediction accuracy drops from 53% to 39% when the cache size increases from 2Kbyte to 16Kbyte (assuming 16byte block size). These results indicate that as the cache size increases, most localities are captured by the cache and that instruction prefetching based on the information extracted from the references that missed in the cache suffers from prediction inaccuracies

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