empty set

It is quite natural to write XPath expressions like/ html/ head/ title, but such expressions return an empty node set, because the input document contains no elements like title.

比较常见的情况是编写/html/head/title这样的XPath表达式，但是这类表达式会返回一个空的节点集，因为输入文档不会包含title这样的元素。

However, with regard to the implementation of jury system in later three years, the system still exposed many flaws, and has not been getting rid of the situation of "empty set".

然而，从近三年法院实施陪审制度的情况来看，该制度仍暴露出许多弊端，很大程度上并没有摆脱虚置的困境。

He set down the empty glass.

他放下空酒杯.

In the administrative law the custom existence empty is set at the law in the certain circumstances, the law authority receives enormous weakening.

行政法中习惯的存在将法律在某些情况下被虚置，法的权威性受到极大的削弱。

In a few days the dugouts were built and ovens-burzhuiki ( little bourgeois) made out of empty fuel barrels were set up inside them.

在几天内我们构筑了工事并且我们把由“小资产阶级”制造的空油桶放在里面。

He set off the next day for Kamen-Rybolov to inspect the land on offer, driving for hours in torrential rain through sodden taiga and mostly empty villages.

布加耶夫隔天便向卡缅雷博洛夫进发，勘查那些可供领取的土地。他在倾盆大雨中开了好几小时的车，穿过浸泡在水气中的针叶林与罕有人烟的村庄。

This process is known as "index matching" and produces a ( possibly empty) set of eligible indexes for the given query.

该过程被称为“索引匹配”，并且为给定的查询生成一组合适的索引（可能是空集）。

Because the core is empty set, the model doesn ′ t solved by using negotiation model of Nash-Harsanyi.

由于不存在核，无法用Nash-Harsanyi谈判模型求解。

In particular, efficient solution set ( or weak efficient solution set) may often be the empty set when the feasible set is noncompact. But the set of approximate solution in very weak conditions can be not empty.

特别地，在可行集非紧的条件下，向量均衡问题的有效解集（弱有效解集）往往是空集，但近似解集在很弱的条件下一般都是非空的。

The mixed weights least squares ( MWLS) stable generalized control algorithm for constrained single input single output system has advantages of reducing the computational burden, ensuring the stability of close system and coping with the case of an empty feasible set.

单变量混合加权最小二乘（MWLS）稳定预测控制算法具有在线计算量少、闭环系统稳定以及处理存在不可行解的情况等优点。

We define the superior set of decision units, and show that our model is outstanding than a kind of multi-objective programming, especially eliminate the Pareto-efficiency solution of the empty superior set.

我们首先定义了决策单元的优势集，论证了C2RM模型比一类多目标规划模型在优化意义上更进一步&排除了此类多目标规划模型的一些优势集为空的Pareto有效解。

For task commands, an empty command result is set before invoking the execute() method.

对于任务命令，在调用execute（）方法之前设置空的命令结果。

Take the three "cash desks" it set up in its offices, to which employees could bring empty suitcases to be filled with cash.

以公司内设立的三个“收银台”为例，公司员工可以在“收银台”将空公文包装满现金。

Considering a core is an empty set, in view of the application scope of the core and its limit, this paper develops one multi-objective programming model for the cost allocation problem of n-person cooperation game, and then presents two-phase approach for solving the cost allocation problem.

摘要考虑核心是空集的情况，针对核心法的适用范围和局限性，建立了一种多人合作费用分摊的多目标规划模型，给出了求解费用分摊方案的两阶段算法。

Leibniz enunciated the principal properties of what we now call conjunction, disjunction, negation, identity, set inclusion, and the empty set.

莱布尼茨阐明了我们现在叫做合取、析取、否定、同一、集合包含和空集的首要性质。

In contrast, if a completely unprivileged user runs this same program, his empty inheritable set is masked against fI, resulting in the empty set.

另一方面，如果一个完全没有特权的用户运行同一个程序，他的可继承集是空的，这个集与fI求交集，会产生一个空集。

Empty row cannot be inserted. Row must have at least one column value set.

无法插入空行。行必须至少有一个列值集。

Possibly an empty set of constraints.

约束条件得出的也可能是空值。

Next, create an empty entry and set its contents as the element representing the encrypted entry.

接下来，创建一个空条目并将表示已加密条目的元素设置为它的内容。

If IMAP server doesn't support NAMESPACE extension, but you're using shared folders or personal root folder is non-empty, you'll need to set these options.

如果IMAP服务器不支持命名空间扩展，但你使用共享文件夹或个人的根文件夹是非空，你需要设置这些选项。

E 2 and E 5 sets mainly produced stainable abortive pollens ( SAP ), whereas E 3 set mainly did empty abortive pollens ( EAP ).

E2和E5位点组的作用主要产生染败花粉, 而E3位点组的作用主要产生空败花粉.

Two empty brackets were set there, and that morning a sword his own sword, the sword of his father and his father before him had hung on them.

墙壁上两个凸出的剑架空空如也。可就在那天清晨，他的剑他父亲、他父亲的父亲传给他的剑还挂在剑架上。

The set of signals pending for the child process shall be initialized to the empty set.

已经设置的信号在子进程中将被置空？

Start from scratch: Start with an empty set of conditions and add your own.

从头开始：从一组空的条件开始并添加您自己的条件。

Finally, the sub-image with empty threshold is set to average threshold of its neighbor sub-images.

最后，将阈值为空的子图像的邻域子图像阈值平均值作为该子图像的阈值，进行迭代运算直到每个子图像都有阈值，二值化整幅图像。

An empty result set emits no output.

空结果集将不产生输出。

They take their driverless car to an appointment and set the empty vehicle to circle the building to avoid paying for parking ．

他们带着无人驾驶的汽车去赴约,让空车绕着大楼转,以免付停车费。

This time, the non-root user has an empty capability set, while the process started as a root user has cap_dac_override in its permitted and effective sets.

这一次，非根用户的能力集是空的，作为根用户启动的进程的允许集和有效集中包含cap dac override。

Based on the definition of core, the author presents a formula for calculation when the core exists. When the core is an empty set, the paper also gives the method of how to get the profit distribution that can satisfy all the players.

基于核心的概念，提出了当核心存在时求解的公式以及当核心不存在时如何使得所有参与者满意的利润分配方法。