中文摘要：

通过对1985—2008年一类授权专利在中国三大城市群内地理扩散过程的描述,发现地理距离对知识溢出空间衰减的影响并不稳健,呈现出明显的区域差异。进一步按照空间计量经济学要求选择地理质心并引入地理距离,实证检验知识溢出的空间扩散过程。研究发现,空间知识溢出不仅受地理距离影响,还因知识缺口大小、吸收能力差异而呈现不同的扩散过程,在控制吸收能力影响后,地理距离对空间知识溢出的影响不再显著。提升区域吸收能力、缩小知识缺口将明显阻尼知识溢出的空间衰减。

英文摘要：

Take the diffusion process of a kind of granted patents in three ″city group″ of China as a clue,through the describe of spatial diffusion of ″solar energy″ granted patents,we found that the geography distance＇s influences on spatial knowledge spill-off was not significant continuously.Furthermore,geography distances were introduced according to the methods of spatial geography economics and the spatial diffusion process of knowledge spill-off was test empirically.The research results indicated that the influential effects of spatial knowledge spill-off may be complicated,which not only included geography distances but also included knowledge gap and absorb capability.Knowledge gap hampered spatial knowledge spill-off significantly.When the absorb capability was controlled,the effects of geography distances became insignificant.Improving regional absorptive capability and reducing knowledge gap may strength the level of spatial knowledge spill-off.