Base on the dynamic data table, a method of radar echo signal simulated by bitmap was discussed, and full screen long afterglow algorithm was given.

在动态数据表的基础上，提出了用位图模拟雷达回波信号的方法和过程，及模拟动态雷达回波的全屏长余辉消隐算法。

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The production method, application effect and environment benefit were introduced for long effective urea base compounded and mixed fertilizer taking the long effective urea as a basis.

介绍了以长效尿素为基础氮肥的长效尿基复混肥料的生产方法、使用效果和环境效益。

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The new method USES reference portfolio formed on the base of corporation market value to calculate long-run abnormal returns, USES adjusted-t test or rank test to test abnormal returns.

改进的长期异常回报率计算方法是基于市值的参考组合法，改进的检测方法是偏度矫正的t检验法和秩和法。

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