Tạp chí Khoa học - Trường Đại học Thủ đô Hà Nội: Khoa học Tự nhiên và Công nghệ

NOVEL INCREMENTAL ALGORITHMS FOR ATTRIBUTE REDUCTION FROM DYNAMIC DECISION TABLES WHEN ADDING OBJECT S

Ho Thi Phuong, Truong Duc Phuong — Thu, 10 Aug 2023 06:29:25 +0700

In recent years, attribute reduction methods following fuzzy rough set approach
have attracted the attention of researchers because they improve the accuracy of the
classification model. However, most of the proposed methods are performed on the unchanged
decision table. In this paper, we build an incremental algorithm to find the approximate reduct
according to the combined filter-wrapper approach. Experimental results on a number of
sample datasets show that the proposed incremental algorithm is more efficient than some
other incremental algorithms following the filter approach in terms of the number of reductive
set attributes and classification accuracy.

DESIGN SOME GRADE 6 MATH TESTS TO ASSESS THE DEVELOPMENT OF MATHEMATICAL COMPETENCIES

Nguyen Van Anh, Le Thi Van Dung, Tran Anh Phuong, Nguyen Thi Hong — Thu, 10 Aug 2023 06:33:16 +0700

In this article, we study the innovations in testing and assessing learning and
educational outcomes in the direction of developing students' qualities and competencies
according to the 2018 general education program. From that, we design the regular and
periodical test in the direction of developing qualities and competencies for 6th grade students
according to the new general education program. In each test, we have developed test
specifications, matrix of questions, and grading instructions.

SOME REAL PROBLEMS AND APPLICATION OF THE GREATEST COMMON DIVISOR, THE LEAST COMMON MULTIPLE

Hoang Minh Giang, Nguyen Thi Thu Hoa, Nguyen Thi Hong — Thu, 10 Aug 2023 00:00:00 +0700

One of the contemporary learning and teaching orientations in the general
education curriculum in 2018 is to connect math to everyday lives and focus on applying
mathematics concepts to solve real-world issues. As a result, we studied a variety of practical
problems involving the greatest common divisor and least common multiple. Furthermore, we
analyzed typical application problems and the RSA algorithm in cryptography. In particular,
we came up with real-life problems involving the greatest common divisor and least common
multiple and implemented the RSA algorithm in Maple.