94 research outputs found
Water filtration by using apple and banana peels as activated carbon
Water filter is an important devices for reducing the contaminants in raw water. Activated from charcoal is used to absorb the contaminants. Fruit peels are some of the suitable alternative carbon to substitute the charcoal. Determining the role of fruit peels which were apple and banana peels powder as activated carbon in water filter is the main goal. Drying and blending the peels till they become powder is the way to allow them to absorb the contaminants. Comparing the results for raw water before and after filtering is the observation. After filtering the raw water, the reading for pH was 6.8 which is in normal pH and turbidity reading recorded was 658 NTU. As for the colour, the water becomes more clear compared to the raw water. This study has found that fruit peels such as banana and apple are an effective substitute to charcoal as natural absorbent
A Preliminary Study on the Use of Fuzzy Rough Set Based Feature Selection for Improving Evolutionary Instance Selection Algorithms
In recent years, the increasing interest in fuzzy rough set
theory has allowed the definition of novel accurate methods for feature
selection. Although their stand-alone application can lead to the construction
of high quality classifiers, they can be improved even more if
other preprocessing techniques, such as instance selection, are considered.
With the aim of enhancing the nearest neighbor classifier, we present
a hybrid algorithm for instance and feature selection, where evolutionary
search in the instances’ space is combined with a fuzzy rough set based
feature selection procedure. The preliminary results, contrasted through
nonparametric statistical tests, suggest that our proposal can improve
greatly the performance of the preprocessing techniques in isolation.Project TIN2008-06681-C06-01Spanish Ministry of EducationResearch Foundation - Flander
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