查询词典 vacuous subset

And since, to uncover relationships between customers and profits, most direct marketers rely heavily on data about actual customers - who are only a subset of the total pool of possible customers-they are bound almost by necessity to estimate the relation- ship between acquisition, retention, and profits incorrectly.

因此，为了揭示客户与利润间的关系，大多数直销人员偏重于依赖实际客户的数据，而实际客户只是所有可能的客户总库中的一个子集，最后注定他们对客户的获取、维持与利润之间的关系的评估是不正确的。

It allows a subscriber station to concentrate its transmit power on a subset of the total OFDM subcarriers, leading to link budget improvements in the uplink. These translate into coverage and capacity benefits.

它允许用户站点把传输功率集中在总OFDM子载波的一个子集上，造成上行链路中链路预算的提高，因而提高覆盖范围和能力。

In cellular and PCS systems, a grouping of physically proximate cells in which each cell uses a different subset of the total spectrum allocated for the wireless service, but the grouping or cluster of cells represents the total allocated spectrum.

蜂窝系统以及 PCS 系统中一组物理上紧邻的小区。在这个小区群集中，每一个小区使用的频谱是无线通信业务分配到的整个频谱中的一部份。但是小区组或群集却代表整个分配到的频谱。

Since any frequent itemset is a subset of a maximal frequent itemset (an itemset is maximal frequent if it has no superset that is frequent), this paper proposes the DMFI (Discovery of Maximal Frequent Itemsets) algorithm for mining all the maximal frequent itemsets from data sets. This algorithm searches the maximal frequent itemsets in data sets from both bottom-up and top-down directions in the meantime. This paper proposes an algorithm that evaluates the boundaries on the support and confidence of uncalculated itemsets by exploiting the information provided by the calculated itemsets.

本文在经典关联规则的基础上，提出了一系列扩展的关联规则开采算法：发现关联规则的难度体现在发现频繁项目集上，事实上最大频繁项目集（其所有的超集都为非频繁项目集的频繁项目集）的集合已经包含了所有的频繁项目集，本文提出一种发现最大频繁项目集的算法DMFI(Discovery Maximal Frequent Itemsets)，该算法采用自底向上和自顶向下相结合的搜索策略对数据空间进行有效的搜索。

Our previous studies have identified an undescribed regulatory DC subset, which were developed from differentiation of mDCs educated by splenic stromal cells.diffDCs secret high levels of IL-10 and NO, and inhibit proliferation of activated CD4+ T cells, suggesting its negative feedback control on the immune response in the late phage.

diffDCs是本室最近发现的新型调节性DC亚群，由mDCs在脾脏基质细胞的作用下分化而来，具有高分泌IL-10和NO、抑制抗原特异性CD4~+T细胞增殖的功能，提示浙江大学博士学位论文中文摘要可能在获得性免疫应答晚期起负性调控作用。

First, it is proved that for an uniformizable operator D, there exists an operator B such that AC=BD if C Ker D \subset Ker A.

首先证明对可单值化算子D，如果C Ker D \subset Ker A，则存在算子B使AC=BD。

That is to say, we would have nothing more meaningful than an uninterpreted formal language, formal rules of inference, and a subset of the set of well-formed formulas as axioms.

也就是说，我们持有的有意义语言甚至超不过一个尚未解释的形式语言、形式推理规则和作为公理的合式公式子集。

For a universal set, the set of all elements in the set that are not in a specified subset.

补集对任意一个集合，这个集合的所有元素不共存在于它的任一子集合

A numeral 1 in the ith component of the vector denotes the inclusion of the ith element of that particular subset;a 0 denotes its exclusion.

向量中的第I个分量为数字1表示集合的第i个元素在某一特定的子集中，用数字0表示不在某一特定的子集中。

A numeral l in the i-th component of the vector denotes the inclusion of the i-th element of that particular subset; a 0 denotes its exclusion.

向量中的第 i 个分量为数字 1 表示集合 T 的第 i 个元素在某一特定子集中，用数字 0 表示不在某一特定子集中。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。