The h-type index sequence based on fixed citation window:case studies on Chinese physics,Indian physics and Japanese physics

H-type indices are bibliometric indicators combining publication indicator with citation indicator.h-type index sequence could be applied to present the changing tendency of the research performance of the evaluated units.Full citation windows were used in the formal study on h-type index sequences.Therefore,the h indices are incomparable between different publication years because of the non-uniform citation windows.In this paper we introduce the method to create the h-type sequence based on fixed citation window,which made the h-type indices of different years comparable.Selecting SCI physics papers published by Chinese,Indian and Japanese during the period 1978-2009 we constructed the three countries' h-sequences,g-sequences,a-sequences and r-sequences,respectively,with five-year citation window.The development of Chinese physics,India physics and Japanese physics are compared.