This paper is focused on the methods of the construction of spatial transaction database, which is a crucial ste Pin the spatial association rules mining.
将空间数据库转换成空间事务数据库是空间关联规则挖掘过程的关键步骤。
If the corresponding spatial row does not exist, there is simply nothing to delete; this condition is not an exception that causes a transaction to roll back.
如果对应的空间行不存在，那么就不删除任何东西；这种情况不是异常，不会导致事务回退。
Along with the change of market environment, firms and merchants will adjust the time arrangement and spatial distribution combination of transaction in order to achieve the minimum transaction.
交易者将随着市场环境的变化，调整交易时间配置和空间分布的组合，以求达到交易成本最小化。
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