We consider a quadratic regression model and derive D-optimal exact designs for estimating any given subset of the model parameters. Our results complete recent findings of Krafft and Schaefer (1995) ...

Quadratic programming models are used in farm planning because risk and uncertainty are involved in the technical and economic coefficients used and the quantities and prices of resources. A special ...

LEDs are nonlinear devices with I/V curves that resemble the curves of rectifier diodes. Designers of lighting drivers require a good approach to modeling the LED device performance in the first ...