How Does A Science Revolution Arise

Science concept is a cell and important part of science theory; it is an important carrier of development of science knowledge. Although many historians and philosophers of science have stressed the important science revolution, there has been little detailed explaination to these changes. To deepen studing science revolution, Pual Thagard has studied conceptual changes explanation coherence and computational model of TEC from conceptual angle. He think there have produced conceptual revolution in science revolution.Thagard and collaborate introduce the research products of AI to the research of conceptual change of science, he had deepened to study the mechanisms and logics of conceptual change of science and published concept revolution in 1992. He had studied science revolution along with such a direction: first, provide a theory of science revolution. To science revolution, he thinked science revolution included the important changes of concept system and proprosition system, concept system mainly included kind and part hieratchies, new theoritical concepts arise by mechanisms of conceptual combination, propositional system are structured by relations of explainatory coherence, new theoretical hypotheses generally arise by abduction, the transition to new conceptual and propositional systems occurs because of the greater explainatory coherence of the new propositions that use the new concept. Second, he studied the conceptual system of science theory. Third, he studied the computational mechanisms which could produce conceptual system. Fourth, he studied the explainatory coherence of competition theory each other in science revolution. He studied seven science revolution and the problem of conceptual change of behaviorism cognitivism, using his theory. This thesis tries to study his important theory of science revolution from his theory of concept and conceptual change.This article contains six parts: Preface; Chapter one, two, three, four; conclusion.In preface, this article generally summarize the meaning and aim of selecting this theme, literature, the trends of in-country and overseas, things of research and innovation.tIn chapter one, this article mainly inspect and analyzes three important concept of Thagard' science revolution-----science revolution, concept revolution, conceptual change andtheir relations.In chapter two, this article studies the Thagard'concept and conceptual change theor. Firstly, it Summarize the content of Thagard' concept and conceptual change theory, then it explores the mechanisms of conceptual development and change.In chapter three, this article studies the Thagard'dynemical system. Firstly, it Summarize the content of Thagard' dynemical system of new conceptual system, he provided explainatory coherence of new conceptual system was essence cause which science revolution arise, then it explores his theory of explainatory coherence and the application of computational model and people' cognitive ways.In chapter four, this article studies and analyzes Thagard' conceptual revolution theory. it explores the influence and localization of conceptual revolution theory , it think Thagard' theory provide a set of new cognitive theory to deepen science revolutionand and provide a way to the cognitive reverse of Philosopy of Science and think more conceptual change arise than belief reverse in science revolution and provide the localization of conceptual change theory.In the end, base of 20 century historical reverse direction of philosophy of science, this article think Thagard's theory not only provided a set of evaluation of conceptual revolution, but it is very important meaning to deepen the replacement of scietific theory and cognitive reverse direction of philosophy of science. It think Thagard' theory has localization in his theory' struction, because it lack of participation of scientist' personal motivation and emotion, social factor.