我国大科学工程建设方向的再思考——从研究投入结构的角度出发

大科学工程对科技发展具有不可替代的支撑作用，把握大科学装置的建设方向，是中国站在向创新型国家转变的关键转折点这一特殊时期的必然选择。文章以索罗模型为基础，构建了知识在经济中传递的模型，并通过多期迭代计算证明了①与增加应用研究投入相比，基础研究投资增加对经济产出有更显著的促进作用；②当研发产出结构与应用研究的产出存在相关性时，基础研究比重过低会导致长期的应用研究产出增长乏力，对经济增长有负面影响。基于此，对大科学工程的建设方向做如下建议：大科学装置的投资建设应该更加重视对基础研究领域的支持；对应用研究层面的大科学装置的立项更为审慎，当缺乏相关基础知识的支撑时，应该暂缓对应用研究层面大科学装置的建设。

Rethinking the Constructing Direction of large-scale scientific projects in China:

Large-scale research projects play an irreplaceable supporting role in the development of science and technology. Based on Solow model, we establish a multi-period model to capture the interaction between basic and applied research and the joint effects of basic and applied research on our economy. According to our calculations, we prove that: (1) compared with increasing investment in applied research, the increasing investment in basic research has a more significant effect on economic output; and (2)when the output of the applied research depends on the output of the basic research, the low-level investment in the basic research results in a negative impact on the economy. According to our analysis, we suggest that the investment in the basic research is supposed to be supported when we consider large-scale research projects. In the other words, the large-scale research project in applied research should be delayed if we lack correlation basic theoretical support.