是否下载进度的某项或不应该在一些存储信息数据源(或模型)而不是在细胞(的视图)。
The information whether a download is in progress for a certain item or not should be stored in some data source (or model) and not in the cell (the view).
在工程进度曲线的基础上，根据进度曲线所提供数据，运用灰色系统理论，建立一种进度偏差预测模型。
On the basis of the project progress curve and according to the data from it, the grey system theory is applied to establish a model for the prediction of progress deviation.
在工程进度曲线的基础上，根据进度曲线所提供数据，运用灰色系统理论，建立一种进度偏差预测模型。
On the basis of the project progress curve and according to the data from it, the grey system theory is applied to establish a model for the prediction of progress deviation.
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