查询词典 null algebra

However, one possible issue is that it doesn't have the solid foundation in set theory that a query language based on a pukka relational algebra has (see Chris Date,"Database in Depth", O'Reilly, ISBN 0-596-10012-4, for what this means).

但是，一个可能的情况是它在集合处理领域还缺乏像关系型数据库那样坚实的基础。

He was a member of the redactional committees for Psychometrika, Numerische Mathematik, Linear Algebra and Its Applications, and has been editor in chief of the SIAM Journal on Numerical Analysis.

而在用最小二乘法(1east—squares)对矩阵进行近似计算时，目前常用到的一种变换法也是由豪斯霍德创造的，因而被称为&Householder transformation&。

He managed to refashion the algebra into a manageable, more elegant form.

他成功地把代数公式改进成了更易处理、更简洁美观的形式。

During the development of risk assessment scale in Taiwan, it was always found that the ROC seemingly is the mean of sensitivity and specificity, while using 2 by 2 table of "guess yes or not" and "reoffense or not". In this study, it was verified the previous notion through algebra.

从发展本土化的婚姻危险评估表及性侵害加害人静态表中发现ROC曲线值在预测2×2表（即是猜测会否再犯及实际是否再犯之表）上似乎是敏感及特之平均值，经由本研究以公式及图形之验证，发现确如上述。

For instance we read in the historian Halle:"This Araby worde Algebra sygnifyeth as well fractures of bones as sometime the restauration of the same."

例如我们读到的历史学家哈雷：&这阿拉worde代数sygnifyeth以及骨折的骨骼恢复某个相同的。&

Numerical algebra ; matrix ; equation ; symmetric positive semidefinite solution

数值代数；矩阵；方程；对称半正定解

The idea that algebra is easier than arithmetic may be true in someways.

代数比算术容易，这种看法在某些方面也许是对的。

Sparky also flunked Latin ,algebra ,and English .

斯帕基的拉丁文、代数和英语也都不及格。

Stational systems ; Intermittent systems ; Liner ; Systems ; Computational methods of linear algebra ;/The minimum step control sequence

定常系统；断续系统；线性；系统；线性代数计算法；／最小拍控制序列

"My behavior is on behalf of half zebras," the algebra teache r said.

&我的行为代表了一半斑马的利益，&代数老师说。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。