Paper cutter machine is backward with low degree of automation in paperboard processing, so new paper cutter machine has been designed based on pneumatic principle and simulation technique.
The Backward function is important for the whole analysis while we use an On-Line Analytical Processing (OLAP) system.
该文论述了用户使用联机分析处理（OLAP）系统时，回退功能对整个分析过程所具有的重要意义。
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In this approach, come decision rules are stored in an associative matrix, by processing the new inputted state information forward and backward, a reasonable decision alternative can be obtained.