Introduction -- Formation of Flexible Linguistic Values and Their Mathematical Models -- Formation Principles and Modeling of Imprecise Information -- Fundamental Theories of Flexible Sets and Flexible Linguistic Values -- Mathematical Theories about Imprecise Information -- Truth-Degreed Logic and Flexible-Linguistic-Truth-Valued Logic -- Logic Theories about Imprecise Information -- Approximate Reasoning with Flexible Linguistic Rules and Approximate Evaluation of Flexible Linguistic Functions -- Reasoning and Computation with Imprecise Information and Knowledge -- Imprecise-Problem Solving and Imprecise-Knowledge Discovery --Application of Imprecise-Information Processing -- Quantifiable Rigid Linguistic Values and Information Processing with Degrees -- Extension of Imprecise Information -- Probabilities of Flexible Events, Believability-Degrees of Flexible Propositions and Reasoning with Believability-Degrees as well as Modal Propositions.

The book showcases cutting-edge concepts and methods, and presents the principle of imprecise-information processing. It also proposes a new theory and technology for imprecise-information processing that differs from fuzzy technology, thus providing a platform for related applications and laying the theoretical basis for further research. Imprecise-information processing � a type of processing based on flexible linguistic values and quantifiable rigid linguistic values � is an important component of intelligence science and technology. This book offers an easy-to-understand overview of the basic principles and methods of imprecise-information processing, allowing readers to develop related applications or pursue further research.