The effects of different quaternary ammonium salts were studied.

It was pointed out that the quaternary ammonium salt was the most important phase transfer catalyst.

指出了此类合成反应中所采用的重要相转移催化剂是季铵盐类.

A quaternion can be used to represent any arbitrary rotation.

四元数可用来表现所有形式的旋转.

The norm of a quaternion is similar to that of a vector.

四元数的平均值与矢量的有点相似.

Two control laws are presented for attitude regulation of a rigid body expressed by quaternion.

给出了用四元数+表示的刚体姿态调节问题的两种控制规律.

Some inequalities of eigenvalues for weak cycle products of self-conjugate quaternion matrices are given.

给出了自共轭四元数矩阵的弱圈积的特征值的一些不等式.

In this paper, we obtain some inequalities for norm and traces of quaternion matrices.

本文获得了四元数矩阵的范数和迹的一些不等式,改进了近期的某些结果.

The method of adjusting screen-coordinate and object-coordinate of plane model with quaternion is discussed.

论述了以四元数法调整模型的屏幕坐标和物体坐标的方法.

It is realized by real quaternion overrides the weakness of matrix such as unintuitionistic, complex calculation.

此算法采用实四元数组实现,克服了采用矩阵实现时的非直观性 、 计算复杂等弱点.

Eight , design SAMPLE language grammar, semantic analyzer, the output quaternion type of intermediate results.

设计SAMPLE语言的语法 、 语义分析器, 输出四元式的中间结果.

Two control laws are presented for attitude regulation of a rigid body expressed by unit quaternion.

给出了用四元数表示的刚体姿态调节问题的两种控制规律.

Xiaoming likes Tang poetry very much , especially its quatrains.

小明喜欢读唐诗, 尤其是其中的绝句.

String Quartet No.30 in A major , Op. 93, Quatuor brillant.

大调第三十弦乐四重奏曲, 作品93, “灿烂四重奏曲”

To tremble quaver in sound , as of the voice or a musical note.

半音加两个符点, 时值等于三个四分音符或一个八分音符.

There was a quaver in Beryl's voice.

贝丽尔的声音有一丝颤抖.

You could hear the quaver in her voice.

她的声音中能听出有些颤抖.

There was the quaver in her voice as she said this.

她这么说时,声音几乎没有颤抖.

I quaver when speaking to large audiences.

对许多人讲话时我便会发颤.

To tremble or quaver in sound , as of the voice or a musical note.

时间量是全音符一半的一个音乐符号.

There was the least quaver in her voice as she said this.

"她这么说时,声音几乎没有颤抖.

Miss Su cursed him in Chinese. Her voice seemed to have a quaver in it.

苏小姐用中文骂他, 声音似乎微颤.