We consider the design and analysis of algorithms to retrieve simple random samples from databases. Specifically, we examine simple random sampling from B+ tree files. Existing methods of sampling from B+ trees, require the use of auxiliary rank information in the nodes of the tree. Such modified B+ tree files are called “ranked B+ trees”. We compare sampling from ranked Bt tree files, with new...

Rejection sampling is a well-known method to generate random samples from arbitrary target probability distributions. It demands the design of a suitable proposal probability density function (pdf) from which candidate samples can be drawn. These samples are either accepted or rejected depending on a test involving the ratio of the target and proposal densities. The adaptive rejection sampling ...

This study proposes a new repetitive group sampling plan by attributes based on truncated life test under the Weibull distributions with known shape parameter. The constrained optimization problem is formulated as a nonlinear integer programming to determine the sample size and the acceptance criterion of the proposed plan. The objective function to be minimized is the average sample number, wh...

The design of acceptance sampling plans for hybrid exponential distribution under a truncated life test is considered in this paper. In this work, experimental values are treated as observed values of exponential random variables whose mean is assumed to be a fuzzy variable in the sense of Liu [25]. A new chance distribution called hybrid exponential distribution is considered in this paper and...

aim and background: there is a relation between patients' levels of physical functioning and their acceptance of chronic pain. however, this relation has not been examined amongst iranian chronic pain patients. the purpose of this paper was to evaluate the relation between acceptance of chronic pain and physical disability. methods and materials: in a descriptive-correlational study, convenienc...

This study proposes a new approach for single-sampling plan by determining sample size and acceptance number. The proposed approach is based on a two-step methodology. In the first step: quality management step, different single sampling inspection plans were generated by running an optimization model for different possible acceptance numbers. While, in the second step: Multi-Attribute Decision...

In this paper we present the optimum sampling size in zero-defect acceptance with rectification sampling scheme in the presence of misclassification errors. Its development is based on an economical model. The procedures are implemented in a program using the software Matlab and illustrated by an example.

In this paper, an engineering statistical model is proposed for the prediction of control and assurance in software engineering. This paper attempt statistical learning theory is to studies in a framework the properties of learning theory based on software engineering in quality testing using acceptance sampling statistical quality control and software testing and quality assurance on sampling ...

We develop acceptance sampling plans assuming that the life test is truncated at a preassigned time. The lifetimes of the test units are assumed to follow the Birnbaum Saunders distribution. The minimum sample size necessary to ensure the specified average life is obtained and the operating characteristic values of the sampling plans and producer's risk are presented. An illustrative example is...

In this paper introduce the average outgoing quality (AOQ) and average total inspect (ATI) for single sampling plan when that proportion nonconforming items is fuzzy number. We have shown that AOQ and ATI curves of the plan are like a band having a high and low bounds. Keywords—Statistical quality control, acceptance single sampling, average outgoing quality, average total inspection, fuzzy num...