第二种容量管理办法可近似地认为是通过重复数据删除或数据压缩来减少主存储磁盘上的数据。
The second capacity management approach to consider is reducing data on primary disk storage via data deduplication or data compression.
提出了一种等值线标注的算法，通过先找出等值线的近似多边形，然后根据系统要求在等值线上或近似多边形上输出标注。
An algorithm for label of isograms is presented, firstly approximate polygon about isograms is found, then label on isograms or polygon according to system requirement is written out.
其次，应用泰勒展开定理，设计了一种近似的延迟反馈控制方法，将受控的系统稳定到希望的周期轨道或平衡点上。
Secondly, we design an approximated delay feedback control method by applying Taylor theorem; it can make the controlled system stabilize the expected periodic orbits or equilibrium points.
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