Improvement of multi-gnss precision and success rate using realistic stochastic model of observations

With the advancement of multi-constellation and multi-frequency global navigation satellite systems (GNSSs), more observations are available for high precision positioning applications. Although there is a lot of progress in the GNSS world, achieving realistic precision of the solution (neither too optimistic nor too pessimistic) is still an...

Mean-variance efficiency of optimal power and logarithmic utility portfolios

We derive new results related to the portfolio choice problem for power and logarithmic utilities. Assuming that the portfolio returns follow an approximate log-normal distribution, the closed-form expressions of the optimal portfolio weights are obtained for both utility functions. Moreover, we prove that both optimal portfolios belong to...

System improvement via variance analysis: The development of a variance analysis model in a complex environment of a specialty brewery

There is little doubt on the utility of a variance analysis to provide insights in the current operational performance and possible improvements. In complex environments data is ambiguous and can lead to less understanding of the results of such analyses. This creates problems in mobilizing the commitment to improve on the analysis’ findings....

Optimalisering van de bemonsteringsfrekwenties van de waterkwaliteitsparameters in het Brielse Meer: Verslag wiskundig onderzoek