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SUMMARY:Post-Fisherian Experimentation: from Physical to Virtual - Wu\, J 
 (Georgia Tech)
DTSTART:20110830T083000Z
DTEND:20110830T093000Z
UID:TALK32566@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Experimental design has been a scientific discipline since the
  founding work of Fisher. During the 80-year history\, its development has
  been largely dominated by work in physical experiments. With advances in 
 high-performance computing and numerical modeling\, virtual experiments on
  a computer have become viable. This talk will highlight some major develo
 pments (physical and virtual) in this long period. Fishers principles (rep
 lication\, randomization\, blocking) will be reviewed\, together with prin
 ciples (effect hierarchy\, sparsity\, heredity) for factorial experiments.
  A fresh look at interactions and effect aliasing will be provided\, with 
 some surprisingly new insights on an age-old problem. Robust parameter des
 ign\, another significant development which focuses on variation modeling 
 and reduction\, will be mentioned. Turning to computer experiments\, the k
 ey differences with physical experiments will be highlighted. These includ
 e the lack of replication errors which ent ails new governing principles o
 ther than Fishers and the use of space-filling designs instead of fraction
 al factorials. There are two strategies for modeling and analysis: based o
 n Gaussian processes or on function approximations. These seemingly confli
 cting approaches can be better linked by bringing a stochastic structure t
 o the numerical errors. Throughout the talk\, real experiments/data\, rang
 ing from manufacturing to nano technology\, will be used for illustration.
  (Note: this talk will be an adapted version of the COPSS Fisher Lecture t
 he speaker will deliver during the Joint Statistical Meetings in Miami in 
 August).\n
LOCATION:Seminar Room 1\, Newton Institute
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