| 摘要 |
<p>PURPOSE:To free a user from the troublesome jobs by erasing automatically the undesired data that have the low using frequency compared with a period passed. CONSTITUTION:Aperiod TDIF=TO-TDIF, i.e., the difference between the present time TO and the latest using date TNX is referred to for each data. If this period is longer than 8 prescribed period AO, the using count frequency UNX of the relevant data is divided by the period TDIF. When this dividing result alphaN=UNX /TDIF is smaller than the prescribed value betaO, the relevant data is automatically erased out of a RAM.</p> |
