Rough set

This paper proposes an efficient method to determine entire reducts of incomplete decision tables according to the relational database approach. In the complex case, this algorithm has exponential computational complexity. However, this algorithm has polynomial computational complexity in the different cases of databases.

9p dianmotminh02 03-05-2024 7 2   Download

The objective of the thesis: Proposes filter-wrapper algorithms for fuzzy rough set based attribute reduction in decision tables to reduce the cardinality of reduct and increase significantly the classification accuracy.

28p extraenglish 24-05-2021 12 3   Download

The first is the hybrid filterwrapper algorithm proposal for finding the reduction set of the decision table using advanced fuzzy distance measurements and other measurements basing on fuzzy rough set to minimize2 the number of attributes of reduction set. Reduce and improve the accuracy of the classification model.

26p capheviahe27 23-02-2021 32 4   Download

The present work deals with a simple approach which predicts the optimum setting of process parameters of drilling operation on Polymer Based Glass Fiber (PBGF) composite.

9p lucastanguyen 01-06-2020 19 3   Download

. Attribute reduction is one of the most important issues in rough set theory. There have been many scientific papers that suppose algorithms on attribute reduction. However, these algorithms are all heuristic which find the best attribute reduction based on a kind of heuristic information. In this paper, we present a new algorithm for finding all attribute reductions of a decision and we show that the time complexity of the algorithm is exponential in the number of attributes. We also show that this complexity is polynomial in many special cases.

7p binhminhmuatrenngondoithonggio 09-06-2017 60 2   Download

Approximation of a picture fuzzy set on a crisp approximation space gives a rough picture fuzzy set. In this paper, the concept of a rough picture set is introduced, besides we also investigate some topological structures of a rough picture fuzzy set are investigated, such are lower and upper rough picture fuzzy approximation operators.

9p dieutringuyen 07-06-2017 58 3   Download

Trong bài báo này, tác giả sử dụng chiến lược phân lớp Half- against-Half và bộ phân lớp nhị phân Support Vector Machines (SVMs) cho bài toán phân lớp đa lớp. Trong đó, để tạo cấu trúc cây cho HAH, tác giả đề xuất một thuật toán dựa trên lí thuyết tập thô (Rough Set Theory – RST). Kết quả của thuật toán sẽ được so sánh với một số chiến lược phân đa lớp phổ biến dựa trên bộ phân lớp SVMs.

10p nganga_03 21-09-2015 60 7   Download

This computerized study of the homonyms of elementary words (roughly equivalent to monosyllabic words) has allowed the compilation of exhaustive lists of homonym sets, using phonetic transcriptions from five different dictionaries. Of the 5,757 elementary words, 2,966 were involved in at least one homonym set, indicating that homonyms will present a significant problem in.

8p nghetay_1 06-04-2013 56 2   Download

roughly: we can define a set of sequences of state transitions on the agent’s monitored/controlled variables that coincides with the set of behaviors prescribed by the goal...

36p ken1802 06-04-2011 60 3   Download

The Brush Strokes effect applies a rough painted look to an image. You can also use this effect to achieve a pointillist style by setting the length of the brush strokes to 0 and increasing the stroke density. Although you specify the direction of strokes, they are scattered randomly by a small amount to give a more natural effect. This effect alters the alpha channel, as well as the color channels; if you have masked out a portion of the image, the brush strokes “paint” over the edges of the mask....

29p emilynguyen 07-08-2009 309 118   Download