只要您从数据库中检索新行，该行就会由其主键记录到标识表中，并且会创建一个新的对象。
Whenever you retrieve a new row from the database, the row is logged in an identity table by its primary key, and a new object is created.
然后通过对目标RCS回波数据进行多项式拟合，估计进动参数，以此为雷达目标识别提供新的技术思路。
The polynomial model fitting for radar cross section (RCS) of target is used for estimating the parameters of precession, which provides a new way for radar target discrimination.
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