The integrated model can simplify administration of privileges, and is appropriate for multilevel relation database system which has many users or complex security levels.
该模型方便了管理员的权限管理,适合用户较多,安全层次比较复杂的多级关系数据库系统。
For modeling the multilevel few sample or irregular data, the accumulated multilevel statistical models of multivariate full model was built on ordinary multilevel statistical models.
为了解决多层的少样本或无规则数据的建模问题,在一般多层统计模型的基础上提出了多变量整体模式的累加多层统计模型。
So the cascade multilevel inverters have been used in many industrial application fields such as fan or pump and the good saving-energy effect has been gotten.
采用模块化安装,易于扩展和维修,并具有冗余功能。现已广泛应用于风机、泵类负载调速场合,取得很好的节能效果。
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