摘要: 本文报道了中能区核物质集体流实验研究中的主要结果，并介绍了确定反应平面的几种方法．在集体流的理论研究方面，本文简述了ＢＵＵ、ＬＶＵＵ和ＱＭＤ计算的一些结果． The main results of experimental study of collective matter flow at intermediateenergy are reported and the several methods of reaction plane determination are also described.On the theoretical studies of flow, a short review on the results of BUU,LVUU, QMD calculations is given.