null set

Action: To alter the datatype , first set all values in the column to NULL.

要修改表的列的数据类型, 必须要先做修改的列置空.

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The relation between threshold, weight and matching degree is also discussed. In order to make the querying friendlier, the method to avoid returning null set and corpora is also presented.

研究了权重、阈值和匹配度之间的关系，提出了避免查询结果为空集或全集的方法，使得查询更加人性化。

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The null set is any set subset.

空集是指不含任何元素的集合,空集是任何集合的子集.

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If isn't set, a default error message of "Parameter null or not set" is displayed.

如果未设置，就显示默认的错误消息“Parameter null or not set”。

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Set to null if it is not going to be used.

如果不用，可将其设为null。

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The null indicator values are set by the RPG HANDLE_UPDATE sub-procedure prior to executing the SQL UPDATE statement.

空指示符值在执行SQL UPDATE语句之前通过RPG HANDLE UPDATE子过程设置。

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Furthermore, time edge balance can help mangers avoid simple and null market response, set competitive pacing and force competitors to follow their strategy direction and to control competitive complexion under rapidly changeable environments. Finally the managers can decide their own destiny.

而且时间边缘的平衡方法可以帮助管理人员避免单纯的市场反应，设定自己的变革节拍，迫使竞争对手跟随自己的战略方向，从而控制急剧变化环境下的竞争格局，最终掌握自己的命运。

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And further, it implicates a significant improvement of the Lebesgue-Rademacher theorem: every Lipschitz mapping between two finitely dimensional spaces is C1 off a null set of first category.

同时也是Lebesgue-Rademacher定理的一个本质的改进：有限维空间之间的Lipschitz映射在某个测度为零的第一类型集外是C~1映射，即有连续的微分映射。

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When all subscribers have unsubscribed from an event, the event instance in the publisher class is set to null.

所有订户都取消订阅事件后，发行者类中的事件实例将设置为nullNothingnullptr空引用（在VisualBasic中为Nothing）。

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The corresponding field in the business object is automatically set to null.

业务对象中的对应字段将自动设置为空。

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If doesn't exist or is NULL, set to and return.

如果不存在或者是NULL，就把设置为并返回。

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For clearing a pool, the one taking a set ( with null Set) should be used.

如果要清空一个池，就要使用那个接收集合的API（传入一个null集合）。

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