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Interpretation of Errors in Solid Bulk Material Sampling Theory and Preparation of a Guide For Sampling From a Solid Material – case of Wheat Flour

Behnampour, Amin | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44060 (01)
  4. University: Sharif University of Technology
  5. Department: Industrial Engineering
  6. Advisor(s): Mahlooji, Hashem
  7. Abstract:
  8. Sampling is the process of selecting and analyzing part of population and generalizing the results to estimate characteristics of the population. Time and cost considerations or the destructive nature of experiments are the main reasons why we study a sample instead of the whole population. In typical applications, sampling units are well-defined which means these units can be defined, selected and analyzed separately. This is the case in taking samples from a human population or products that consist of distinct units. If sampling units are not well-defined, as in the case of a bulk material (e.g., a pile of dust or other particulate materials, a tankful of liquid, the air or other gases) the commonly sampling practical method would be useless. Under these conditions, Theory of Sampling (TOS) can be used as an alternative. It is a comprehensive theory published by Pierre M. Gy after working on bulk material sampling for many years. In theory of sampling, total sampling error (TE) is dissociated to seven components which can be minimized through analyzing, cancelling or minimizing each component. In this research, these errors are described clearly; then, the results are applied to the case of sampling from flour as a bulk material
  9. Keywords:
  10. Heteroscedasticity ; Wheat Flour ; Bulk Material Sampling ; Gy's Sampling Theory ; Sampling Error Variance ; Representative Sample ; Correct Sample ; Wheat Flour Sampling

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