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  • 1 Academia Sinica Institute of Physics Beijing China Beijing China
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A susceptibility parameter called the intelligence constant by which it is possible to assess the complexity of scientific research in the different periods in history is suggested. In scientific sense, the intelligence constant measures creative energy expended in the achievement of a major scientific result. It is demonstrated that the sudden change of intelligence constant signalizes a scientific revolution and so the law of intelligence constant change might provide a particular method to forecast scientific revolutions in the future.