Usage statistics assessment

THE ROLE OF USAGE STATISTICS IN MINIMISATION POLICIES AND IMPACT ASSESSMENT... 

The collection of a reliable set of usage statistics has value in many areas of research, legislation and agricultural support, and is far more than a simple statistical exercise in its own right. In Great Britain, usage statistics form an integral part of minimisation policy and the assessment of pesticide impact on consumers,... 

Prediction residuals (Q) and Hotelling T2 statistics (Section 12.2.5) These allow a sample-wise assessment of abnormality of the on-line-collected data. Furthermore, if they are available throughout the usage of the model, this would enable assessment of any temporal effects regarding such abnormalities, which might coincide with known process events. 

Precision is a measure of how variable a method is in its measurement of a product parameter under normal usage. In statistical terms, precision is measured by the variance of the method. Additionally, the typical sources of variability are accounted for in assessing precision these are random factors external to the method, such as analysts, days, and changing assay hardware ... 

Ideally, a fire hazard assessment should be predicated on incidence studies in actual usage. Such an assessment is difficult for less flammable fluids, ie., fluids with a fire point above 300 C, because of the lack of statistics on fires in which these fluids are involved. 

Most of the literature on the analysis and simulation of gas networks focuses on the fluid-dynamics perspective, mainly oriented to assess flow rates and pressures across network elements [14,11], Optimization of operations has been addressed in various aspects, notably to favor efficient integration within multicarrier systems combining provisioning of electric and gas power [19,17,16,18], In [23] fluid-djmamic analysis of a section of a real gas network is repeated for different configurations of demand reflecting the statistics of usage in different day hours and seasons. 

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