• 제목/요약/키워드: Probability testing

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Vulnerability of roofing components to wind loads

  • Jayasinghe, N.C.;Ginger, J.D.
    • Wind and Structures
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    • 제14권4호
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    • pp.321-335
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    • 2011
  • The vulnerability of roofing components of contemporary houses built in cyclonic regions of Australia is assessed for increasing wind speeds. The wind loads and the component strengths are treated as random variables with their probability distributions derived from available data, testing, structural analysis and experience. Design details including types of structural components of houses are obtained from surveying houses and analyzing engineering drawings. Wind load statistics on different areas of the roof are obtained by wind tunnel model studies and compared with Australian/New Zealand Standard, AS/NZS 1170.2. Reliability methods are used for calculating the vulnerability of roofing components independently over the roof. Cladding and batten fixings near the windward gable edge are found to experience larger negative pressures than prescribed in AS/NZS 1170.2, and are most vulnerable to failure.

The Video on Demand System Failure Evaluation of Software Development Step

  • Jang, Jin-Wook
    • 한국컴퓨터정보학회논문지
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    • 제24권4호
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    • pp.107-112
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    • 2019
  • Failure testing is a test that verifies that the system is operating in accordance with failure response requirements. A typical failure test approaches the operating system by identifying and testing system problems caused by unexpected errors during the operational phase. In this paper, we study how to evaluate these Failure at the software development stage. Evaluate the probability of failure due to code changes through the complexity and duplication of the code, and evaluate the probability of failure due to exceptional situations with bugs and test coverage extracted from static analysis. This paper studies the possibility of failure based on the code quality of software development stage.

Effect of Nonnormality on Bayes Decision Function for Testing Normal Mean

  • Bansal, Ashok K.
    • Journal of the Korean Statistical Society
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    • 제8권1호
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    • pp.15-21
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    • 1979
  • A zone of sensitivity is developed to investigate the effect of nonnormality on the Bayes decision function for testing mean of a normal population when either parent or prior belongs to Edgeworthian family of moderately nonnormal probability density functions.

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The Program for Teaching on Type I error and Type II error

  • 최현석
    • 한국데이터정보과학회:학술대회논문집
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    • 한국데이터정보과학회 2004년도 추계학술대회
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    • pp.17-23
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    • 2004
  • At the conclusion from the hypothesis testing, there is a possibility of making Type I error and Type II error. The purpose of this article is to use this program in statistics teaching through developing the program for studying on the concept about these two errors, two kinds of the probability of errors by the variation of rejection region, two kinds of the probability of errors by the variation of sample size, the relations of the probability $\alpha$ and $\beta$ by these two errors, and power function, power curve.

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멀티미디어가 지원되는 SPRT 시스템 설계 및 구현 (Design and Implementation of Multimedia Supported SPRT System)

  • 범수균;오암석
    • 한국멀티미디어학회논문지
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    • 제5권6호
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    • pp.638-645
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    • 2002
  • 컴퓨터 기반 교육의 잠재적인 이점은 개별화 교습이다. 그러나 컴퓨터를 기반으로 한 교습의 목표는 완전하게 실행될 수 없었다. 가장 큰 이유는 자연어 이해에 대한 제약과 내재된 많은 문제점이다. 그럼에도 불구하고 컴퓨터 기반 평가 길이를 적당히 조절함으로써 학습자의 학습능력을 평가할 수 있는 CAT(Computer-based Adaptive Testing)프로그램 개발은 가능하다. 평가를 위한 문항 수가 두드러지게 감소하면서 반면에 합격과 불합격 판정이 매우 정확하다. 본 논문에서는 SPRT(Sequential Probability Ratio Testing)방식을 이용한 평가시스템을 설계하고 구현하였다. 이 시스템은 개별화 수업을 위하여 다양한 멀티미디어 오브젝트를 지원하고 클라이언트/서버 환경과 학습자 피드백, 다중-SPRT 그리고 학습자 모델을 유지 관리한다. 아울러 문항의 독립성을 위하여 각 문항의 coefficient alpha 값을 측정하여 관리하는 기능을 지원한다.

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표준정규분포의 확률계산 프로그램 개발 (Development of Probability Computation Program for Standard Normal Distribution)

  • 송서일
    • 품질경영학회지
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    • 제25권1호
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    • pp.182-192
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    • 1997
  • The well-known standard normal distribution has been used within the limit of standard variable value of u=3.59. However, the probability values above the limit are not given in the literature. In this study, a probability computation program for standard normal distribution to u=5.99 with the proportional normal distribution a, pp.oximation suggested by Abramowitz and Stegun, Hastings is developed. The new standard normal distribution table developed by the program is presented and will be of help to estimate of probability values for testing and estimation of process mean value, lot acceptable probability, defective percentage of PPM unit of an out-of specification limit, process capability, test power of control charts, probability and statistics.

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Application Of Probability Filter For Maintenance Of Air Objects

  • Piskunov, Stanislav;Iasechko, Maksym;Yukhno, leksandr;Polstiana, Nadiia;Gnusov, Yurii;Bashynskyi, Kyrylo;Kozyr, Anton
    • International Journal of Computer Science & Network Security
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    • 제21권5호
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    • pp.31-34
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    • 2021
  • The article considers the possibilities of increasing the accuracy of estimates of the parameters of the trajectory of the target with the provision of a given probability of stable support of the air object, in particular, during its maneuver. The aim of the work is to develop a filtration algorithm that provides a given probability of stable tracking of the air object by determining the regular components of filtration errors, in particular, when maneuvering the air object, and their compensation with appropriate correction of filter parameters and estimates of air object trajectory parameters.

소프트웨어 최적출하정책의 베이지안 접근방법 (A Bayesian Approach to Software Optima I Re lease Policy)

  • 김희수;이애경
    • 한국신뢰성학회:학술대회논문집
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    • 한국신뢰성학회 2002년도 정기학술대회
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    • pp.273-273
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    • 2002
  • In this paper, we investigate a software release policy with software reliability growth factor during the warranty period by assuming that the software reliability growth is assumed to occur after the testing phase with probability p and the software reliability growth is not assumed to occur after the testing phase with probability 1-p. The optimal release policy to minimize the expected total software cost is discussed. Numerical examples are shown to illustrate the results of the optimal policy. And we consider a Bayesian decision theoretic approach to determine an optimal software release policy. This approach enables us to update our uncertainty when determining optimal software release time, When the failure time is Weibull distribution with uncertain parameters, a bayesian approach is established. Finally, numerical examples are presented for illustrative propose.

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Direct Divergence Approximation between Probability Distributions and Its Applications in Machine Learning

  • Sugiyama, Masashi;Liu, Song;du Plessis, Marthinus Christoffel;Yamanaka, Masao;Yamada, Makoto;Suzuki, Taiji;Kanamori, Takafumi
    • Journal of Computing Science and Engineering
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    • 제7권2호
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    • pp.99-111
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    • 2013
  • Approximating a divergence between two probability distributions from their samples is a fundamental challenge in statistics, information theory, and machine learning. A divergence approximator can be used for various purposes, such as two-sample homogeneity testing, change-point detection, and class-balance estimation. Furthermore, an approximator of a divergence between the joint distribution and the product of marginals can be used for independence testing, which has a wide range of applications, including feature selection and extraction, clustering, object matching, independent component analysis, and causal direction estimation. In this paper, we review recent advances in divergence approximation. Our emphasis is that directly approximating the divergence without estimating probability distributions is more sensible than a naive two-step approach of first estimating probability distributions and then approximating the divergence. Furthermore, despite the overwhelming popularity of the Kullback-Leibler divergence as a divergence measure, we argue that alternatives such as the Pearson divergence, the relative Pearson divergence, and the $L^2$-distance are more useful in practice because of their computationally efficient approximability, high numerical stability, and superior robustness against outliers.

Evaluation of nuclear material accountability by the probability of detection for loss of Pu (LOPu) scenarios in pyroprocessing

  • Woo, Seung Min;Chirayath, Sunil S.
    • Nuclear Engineering and Technology
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    • 제51권1호
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    • pp.198-206
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    • 2019
  • A new methodology to analyze the nuclear material accountability for pyroprocessing system is developed. The $Pu-to-^{244}Cm$ ratio quantification is one of the methods for Pu accountancy in pyroprocessing. However, an uncertainty in the $Pu-to-^{244}Cm$ ratio due to the non-uniform composition in used fuel assemblies can affect the accountancy of Pu. A random variable, LOPu, is developed to analyze the probability of detection for Pu diversion of hypothetical scenarios at a pyroprocessing facility considering the uncertainty in $Pu-to-^{244}Cm$ ratio estimation. The analysis is carried out by the hypothesis testing and the event tree method. The probability of detection for diversion of 8 kg Pu is found to be less than 95% if a large size granule consisting of small size particles gets sampled for measurements. To increase the probability of detection more than 95%, first, a new Material Balance Area (MBA) structure consisting of more number of Key Measurement Points (KMPs) is designed. This multiple KMP-measurement for the MBA shows the probability of detection for 8 kg Pu diversion is greater than 96%. Increasing the granule sample number from one to ten also shows the probability of detection is greater than 95% in the most ranges for granule and powder sizes.