Application of the Rough Set Theory in Structure Activity Relationships of Antielectrostatic Imidazolium Compounds

Abstract

The relationships between the chemical structure and the antielectrostatic effect of 180 imidazolium chlorides were analysed using the method of rough sets. The antielectrostatic activity was determined by measurements of the surface resistance. Using the rough sets approach the smallest set of condition attributes significant for high quality of classification has been found. The resulting decision rules describe relations between the structure and the antielectrostatic properties of imidazolium chlorides in terms of significant condition attributes. This may be helpful in predicting the structures of the new antielectrostatic compounds to be synthesized. * To receive all correspondence

Perspectives on Knowledge Discovery Algorithms Recently Introduced in Chemoinformatics: Rough Set Theory, Association Rule Mining, Emerging Patterns, and Formal Concept Analysis

“…In 2002, Krysinski et al followed up their earlier work by focusing on the ability of RST to provide decision rules which explain activity. 97 They studied the SAR of 180 antielectrostatic imidazolium compounds and showed that RST was able to explain much of the activity of the compounds using a reduced set of only four descriptors. They used the idea of strong decision rules (with high support) to eliminate many rules.…”

A Rough Set Based Approach to Find Learners' Key Personality Attributes in an E-Learning Environment

“…Kobsa argued that most systems were based on the following categories of user data for personalization: demographic data, or "objective facts" about the user; user knowledge level; user skills and capabilities level; user interests and preferences; and user goals and plans (Kobsa et al, 2001). Brusilovsky (2001) suggested that user data should include the following user features that were used by personalized systems developed until 1996: the user's goals/tasks, knowledge, background, hyperspace experience, preferences, and interests. He went further and added user's individual traits to the list.…”

“…LC refers to the language learning conception. It is represented with the scales of the special questionnaire, which is revised to fit the situation of Chinese students by School of Foreign Language, Xi'an Jiaotong University, according to the research of Oxford (2001) and Wen and Wang (2004). (See Box 3).…”

“…Theorem 1: The minimal disjunctive normal form of the discernibility function ∆ corresponds to the all reduction sets of S. This has been proved by Zhang, Wu, Liang, and Li (2001). (2001).…”

“…To acquire the data describing learners' learning styles, learning conceptions, and learning strategies, three questionnaires were applied for this article. These questionnaires are based on the research of Oxford (2001), Cohen and Dörnyei (2002), Wen and Wang (2004), and so forth, and were revised by the School of Foreign Language, Xi'an Jiaotong University, according to Chinese students' special needs. Learning styles denote cognitive styles observed specifically in a learning context.…”