定向

Direct torque control is another high performance control technique of AC motor, it discard the decouple idea of vector control, but adapt flux oriented control and transient space vector theory, directly control stator flux and torque, it has the advantage of rapid torque response and less relying on stator parameters, but has the disadvantage of bigger torque ripple.

直接转矩控制技术是继矢量控制技术之后的又一种交流电机高性能控制技术，它摈弃了矢量控制中解耦的控制思想，采用定子磁链定向和瞬时空间矢量理论，直接对电机定子磁链和转矩进行控制，具有转矩响应快、对电机参数依赖小的优点，但它的不足之处就是存在转矩脉动。

The space quadrature vector oriented control can decouple between output current and frequency of the inverter by Park transformation, which guarantee the quite high accuracy of the 90 degree phase angle between the two-phase output current that supply for two phase electromagnetic stirrer in quite low frequency.

提出了一种基于空间矢量定向的二相电磁搅拌器逆变电源的结构和控制策略，该逆变器采用六桥臂式主电路拓扑结构，逆变器的第三相桥臂与两相电磁搅拌器的中点相连。

Oriented boundary of surface.

曲面的定向边界。

The adsorption of four β-dicarbonyl derivatives on highly oriented pyrolytic graphite surface was studied by scanning tunneling microscopy in an ambient environment.

在大气条件下，利用扫描隧道显微镜研究了四个β-联碳酰基类衍生物在高定向裂解石墨表面的自组装结构。

Heilongjiang mélange distributed in Yilan area of Heilongjiang Province is regarded as the tectonic mélange with features of suture zone. Some metam orphic basic lavas consisting of quite a few metamorphic minerals without directional characteristics are named massive blue schist.

黑龙江省依兰地区分布的黑龙江杂岩被认为是具有缝合带性质的构造混杂岩，其中所含变基性火山熔岩中含有的变质矿物不具有定向组构特征，因此称之为块状蓝片岩。

One version is known as orthogenesis.

其中一个著名的学说是定向进化论[7]。

The errors and area limits caused by the lunar curvature were avoided in this model established under the Selenocentric Orthogonal Coordinate System, the accidental errors of exterior line elements were reduced by orbit fitting and interpolation, the polynomial orders of systematic errors in satellite orbits were decreased with their expression in the flying coordinate system moving and rotating with satellites, and the reliability of exterior orientation solution was enhanced under the condition of sparse and low accuracy control points by appending constraint of orbit and attitude parameters.

该模型通过在月心直角坐标系进行影像空中三角测量来消除月球曲率引起的误差和测图范围限制，通过轨道形状的拟合与插值来减小摄影时刻轨道位置的偶然误差，在飞行坐标系中建立轨道修正模型来减少定向参数的数目，对轨道和姿态增加约束条件来提高月面控制点数目稀少及精度低条件下外方位解算的精度与可靠性。

Common rock samples have been shown to have velocity orthotropy according to measured experimental results .

对岩石样品的测试发现，在普通岩石具有速度正交各向异性特性，既有定向排列的裂缝和岩石的结晶所致，也有层理与岩性特征构成。

By 2010, five OSB mills are expected to be constructed in Russia.

据估计，到2010年俄罗斯将会建成5个定向刨花板的工厂。

Another important factor stimulating the development of OSB production in Russia is the availability of practically unlimited forestry resources.

另外一个刺激定向刨花板生产量提高的因素便是俄罗斯无尽的森林资源。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。