交易是对资料来源以群组或批次一系列更新的方法，使得所有更新一次认可，或在您复原交易时不认可任何更新。
A transaction is a way to group, or batch, a series of updates to a data source so that all are committed at once or none are committed if you roll back the transaction.
每完成一个批次就利用新得到的数据对模型进行更新，该更新的模型也是在前一批次的控制轨迹基础上进行线性化得到的。
Thus, the perturbation model is updated in a batch-wise manner. After completion of each batch, a batch-wise perturbation model is identified linearized around the control trajectory for that batch.
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