emma (version 0.1-0)

emma-package: Designing experiments for process optimization

Description

The evolutionary model-based multiresponse approach (EMMA) is a procedure for process optimization and product improvement. It is particularly suited to processes featuring irregular experimental region due to constraints on the input variables (factors), multiple responses not accomodated by polynomial models, and expensive or time-consuming experiments. EMMA iterativelly selects new experimental points that increasingly concentrate on the most promising regions of the experimental space. The selection of the new experimental points is performed on the basis of the results achieved during previous trials. A multivariate adaptive regression splines (MARS) model and a particle swarm optimization (PSO) algorithm are used to drive the search of the optimum.

Details

Package:

emma

Type:

Package

Version:

1.0

Date:

2011-02-22

License:

GPL (>=2)

LazyLoad:

yes

References

Villanova L., Falcaro P., Carta D., Poli I., Hyndman R., Smith-Miles K. (2010) 'Functionalization of Microarray Devices: Process Optimization Using a Multiobjective PSO and Multiresponse MARS Modelling', IEEE CEC 2010, DOI: 10.1109/CEC.2010.5586165

Carta D., Villanova L., Costacurta S., Patelli A., Poli I., Vezzu' S., Scopece P., Lisi F., Smith-Miles K., Hyndman R. J., Hill A. J., Falcaro P. (2011) 'Method for Optimizing Coating Properties Based on an Evolutionary Algorithm Approach', Analytical Chemistry 83 (16), 6373-6380.

Examples

in.name <- c("x1","x2")
nlev <- c(20, 20)
lower <- c(-3, -3)
upper <- c(3, 3)
out.name <- "y"
weight <- 1
C <- 20
pr.mut <- c(0.1, 0.07, 0.04, rep(0.01, C-3))

emma.peaks<-emma(in.name, nlev, lower, upper, out.name, opt = "mx", nd = 10, 
	na = 5, weight, C , w1 = 0.7, w2 = 0.4, c1i = 2.5, c1f = 0.5, 
	c2i = 0.5, c2f = 2.5, b = 5, pr.mut, graph = "no", fn1 = peaks)

plot(emma.peaks, fn = peaks, n = 50, C = 20)