查询词典 involutory algebra

U(4) algebra is very suitable to describe triatomic molecules, for their Fermi interaction can be described by using nondiagonal matrix elements of Majorana operator.

在研究多原子分子的李代数方法中，尤以U(4)代数适合描述三原子分子，这不仅仅是因为U(4)代数完全描述的是三维情形，物理图象更加清晰直观，而且，U(4)代数的Fermi相互作用可以由Majorana算子的非对角元素给出，不需要再引进另外一个代数。

The image reconstruction algorithms is thoroughly researched. The Filter Back Projection , Algebra Reconstruction Technology and fan beam data rearrangement algorithm used in medical computer tomography are improved. The NOSER algorithm, linear neural networks method and Hopfield neural networks method are presented and gain the better result of image reconstruction.

深入研究了图像重建算法，改进了医学CT的滤波反投影算法、代数重建技术和扇束投影数据重排方法，提出了带图像光滑约束的NOSER算法、线性神经网络方法和Hopfield神经网络方法，并得到了较好的图像重建结果。

If you want to be a draftsman, a machinist, a molder, or a patternmaker, you'll need algebra and geometry and even trigonometry.

如果你想成为手工艺人、缝纫工、造型工或制模工，你需要代数和几何，甚至三角。

Plutella year as a result of rampant development was very short, algebra and more frequent pesticide use, fast development of resistance, chemical pest control has become a major problem.

由于小菜蛾常年猖獗，发育期短，代数多，农药使用频繁，抗药性发展极快，已成为该虫化学防治的一大难题。

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

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。