The author also probes into how to get candidate item sets pertinently, reduce the candidates' size and improve the efficiency of candidate item sets supporting item counting and so on.
在如何有针对性的产生候选项集，从而减少候选集的规模；在如何提高候选项集的支持事务计数的效率等方面进行了研究，给出了算法的具体实现。
After 1840, chinaware production and trade compared with the ancient, though changed a great deal, but still for an item of important goods while counting in the modern customs of China.
1840年以后，瓷器生产和贸易与以前相比，虽然有了很大的变化，但仍为中国近代海关进出口统计中的一项重要商品。
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