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A Comparative Study of Representations for Procedurally Generated Structures in GamesDahl, David, Pleininger, Oscar January 2019 (has links)
In this paper we have compared and evaluated two different representations used in search based procedural content generation (PCG). The comparison was based on the differences in performance, quality of the generated content and the complexity of the final artifacts. This was accomplished by creating two artifacts, each of which used one of the representations in combination with a genetic algorithm. This was followed up with individual testing sessions in which 21 test subjects participated. The evaluated results were then presented in a manner of relevance for both search based PCG as a whole, and for further exploration within the area of representations used in this field.
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Algoritmo evolutivo de cromossomo duplo para calibração multivariada / Evolutive algorithm based on double chromosome for multivariate calibrationSantiago, Kelton de Sousa 05 March 2013 (has links)
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Previous issue date: 2013-03-05 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / samples and variables selection simultaneously. The algorithmic methods combination
for selecting samples and variables in the multivariate calibration aims to building an
effective model for predicting the concentration of a certain interest property.
As study case uses data acquired by a material analysis with near infrared waves (NIR)
on wheat samples in order to estimate the proteins concentration.
The algorithms for selection samples as the random number generator (RNG), KennardStone
(KS), sample set partitioning based on joint X and Y (SPXY) were used in conjunction
with successive projection algorithms (SPA) and partial least square algorithm
(PLS) for selection of variables in order to obtain results that can be used for comparison
basis with the proposed algorithm AGCD results obtained.
The presented results by samples selection algorithms (GNA, KS and SPXY) were too
close,butwhenusedtogetherwithvariableselectionalgorithms(SPAandPLS)theresults
were better in RMSEP terms.
TheAGCDachievedsignificantlybetterresultscomparedtotheotherstestedalgorithms,
reaching an improvement of 97% in comparison with the KS algorithm and an improvement
of 63% over SPXY-PLS algorithm, which further approached the AGCD results. / Este trabalho propõe o uso de um algoritmo genético de cromossomo duplo (AGCD)
paraaseleçãodeamostrasedevariáveisdeformasimultânea.Aassociaçãodosmétodos
algoritmicos para a seleção de amostras e variáveis na calibração multivariada busca a
construção de um modelo eficaz para a predição da concentração de uma determinada
propriedade de interesse.
Como estudo de caso utiliza-se dados adquiridos por uma análise de material com ondas
de infravermelho próximo (NIR) sobre amostras de trigo com o propósito de estimar a
concentração de proteínas existentes.
Os algoritmos de seleção de amostras como o gerador de números aleatórios (GNA),
Kennard-Stone(KS),particionamentodeconjuntodeamostrasbaseadanadistânciadeX
e Y (SPXY) foram utilizados em conjunto aos algoritmos de projeção sucessivas (SPA)
e o algoritmo de mínimos quadrados parciais (PLS) para seleção de variáveis, a fim de
se obter resultados que sirvam como base de comparação com os resultados obtidos pelo
algoritmo AGCD proposto.
Os resultados apresentados pelos algoritmos de seleção de amostras (GNA, KS e SPXY)
semostrarambastantepróximos,masquandoutilizadosjuntamentecomosalgoritmosde
seleção de variáveis (SPA e PLS) seus resultados foram melhores em termos de RMSEP.
O algoritmo evolutivo de cromossomo duplo (AGCD) alcançou resultados significativamentemelhoresemcomparaçãoaosdemaisalgoritmostestados,atingindoumamelhoria
de 97% em comparação com o algoritmo KS e uma melhoria de 63% sobre o algoritmo
SPXY-PLS, o que mais se aproximou dos resultados do AGCD.
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