查询词典 null

Because to_tsvector will return NULL, it is recommended to use coalesce whenever a field might be null.

下面是一个从结构华的文档中创建 tsvector 的推荐的方法

The Filter By Null compound reduces the number of particles based on whether or not they're inside a null's icon shape.

Filter By Null复合节点是通过空物体的图标形状来过滤粒子发射。

The apparatus use Lm336 as constant voltage source, and it been converted to constant - current source by amplification, which provide current for the Hall probe. The non-idiostatic offset circuit use the bridge method to offset the circuit. So while the magnetic density is null, the output voltage of Hall probe is null too.

仪器采用恒压源经过放大器转换为恒流源，为霍尔探头提供工作电流；不等位电势补偿电路采用桥式补偿网络，补偿电压通过调节可变电阻获得，实现霍尔电势的幅值补偿，使外磁场为零时，霍尔探头输出电势为零；磁通电路主要提供对样品的磁特性测量，它由测量线圈和积分器组成。

However, it's okay for a non-null syntactic construct to have a degenerate case matching the null string

然而，一个非空的结构可以有一个老版的匹配空字符串方式。

As we all know, it is equivalent to the null controllability of a cascade system governedby two linear degenerate parabolic equations. Next, we study the null controllability of acascade system governed by a semilinear degenerate parabolic equation and a semilinear heatequation.

众所周知，这等价于两个线性退化抛物方程构成的耦合系统在单个控制作用下的零能控问题；接下来我们又考虑了一类半线性退化抛物方程与半线性热方程构成的耦合系统的零能控问题。

If he has acted to the contrary in the past, or shall in the future, or if he has in the past, is now or shall in the future fulminate any processes or mandates or ecclesiastical censures or any other penalties against the said officials or any other adherents of this council, to the effect that they should follow him then all is null and void and in no way are the said processes, censures and penalties to be obeyed, inasmuch as they are null and void, and they are invalid.

如果他的举动是相反的，在过去，还是在将来，或者，如果他有，在过去，现在，还是在未来的暴发性任何进程或任务或教会责难或任何其他惩罚反对说，官员或任何其他党羽本局同意后，其大意是，他们应该追随他，然后所有的，是无效的并且没有出路，是说进程，谴责和处罚必须遵守，因为它们都是无效的，它们都是无效的。

If he has acted to the contrary in the past, or shall in the future, or if he has in the past, is now or shall in the future fulminate any processes or mandates or ecclesiastical censures or any other penalties, against the said officials or any other adherents of this sacred council, to the effect that they should follow him, then all is null and void and in no way are the said processes, censures and penalties to be obeyed, inasmuch as they are null and void.

如果他的举动是相反的，在过去，还是在将来，或者，如果他有，在过去，现在，还是在未来的暴发性任何进程或任务或教会责难或任何其他处罚，对有关官员表示，或任何其他的信徒们把这一神圣的理事会，其大意是，他们必须遵照他的话，是无效的并且绝不是说进程，谴责和处罚必须遵守，因为它们是无效的。

Based on the theory of isomorphic mapping and singular value decomposition theorem, the maximum of the kernel Fisher discrimination criterion can be skillfully acquired by solving the minimum of its reciprocal in a small space, and the final solution is acquired without taking account of the null space and non-null space of the kernel within-class scatter matrices separately.

基于同构映射原理和奇异值分解定理，在一个更小的空间内将核Fisher描述准则函数的极大值问题转化为其倒数的极小值问题，使最终的解不需要分开考虑核类内散度矩阵的零空间和非零空间。

The relations among three kinds of structural characteristics of fuzzy measure:(1) pseudometric generating property;(2) pseudometric generating property of type p;(3) null-null additivity,and the convergence for sequence of measurable function on semi-continuous fuzzy measure space are discussed.

李军讨论了下半连续模糊测度的3种结构特性：(1)伪距离生成性质；(2)p类型伪距离生成性质；(3)零-零可加性与半连续模糊测度空间上可测函数序列的收敛性之间的关系。

Specifying a null string for file name If you specify a null string for filename , the remaining arguments are ignored.

指定一个文件名称为空字符串，如果你指定一个空字符串为文件名，其余的参数被忽略。

The company mainly produces all kinds of industry screening machines, food packaging machine (solid, liquid, granular, powder), and bottled beer packaging machine assembly line, as well as large-scale wind transport, dedusting equipment design and installation.

公司主要生产各种行业用筛选机、食品包装机（固体、液体、粒状、粉状）、啤酒包装机和罐装流水线以及大型风力输送、除尘设备的设计与安装。

They began to embroider little squares of cloth.

陪同他的是学校的校长，西科尔斯卡小姐。