نتایج جستجو برای: sampling duration
تعداد نتایج: 411394 فیلتر نتایج به سال:
a chromium electroplating bath with the ability to produce homogenous mist was used to evaluate parameters influencing hexavalent chromium (cr+6) mist sampling methods. the results of 48 cr+6mist samples collected using the u.s. national institute for occupational safety and health method 7600showed that cr+6concentration was higher: (1) for sampling by closed-face filter cassettes than for sam...
A chromium electroplating bath with the ability to produce homogenous mist was used to evaluate parameters influencing hexavalent chromium (Cr+6) mist sampling methods. The results of 48 Cr+6mist samples collected using the U.S. National Institute for Occupational Safety and Health method 7600...
the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...
UNU/IIST UNU/IIST enables developing countries to attain self-reliance in software technology by: (i) their own development of high integrity computing systems, (ii) highest level postgraduate university teaching, (iii) international level research, and, through the above, (iv) use of as sophisticated software as reasonable. UNU/IIST contributes through: (a) advanced, joint industry-university ...
Cognitive models of choice almost universally implicate sequential evidence accumulation as a fundamental element of the mechanism by which preferences are formed. When to stop evidence accumulation is an important question that such models do not currently try to answer. We present the first cognitive model that accurately predicts stopping decisions in individual economic decisions-from-exper...
In the paper, the problem of discretization of continuous time in Duration Calculus (DC) is addressed. For a DC formula D, for a sampling step h, a sampling semantics [[D]]h is defined to express the properties of discrete observations of its models, while original semantics [[D]] expresses the properties of the models. In practice, only sampling semantics is implemented. So, an implementation ...
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