极性

Keywords: asynchronous motor; transistor;computer control; SPWM inversion

关健词：异步变频电动机；变频器；SPWM逆变；绝缘栅双极性晶体管；微机控制。

From the polarity of atomic proposition, a series of CTL formulae is derived by substituting the atomic proposition with TRUE or FALSE, before they are verified by model checking tools. If one of the CTL formulae has passed the verification, then it is concluded that the system property is a vacuity.

根据原子命题的极性，用TRUE 或FALSE替换原子命题，得到一系列的CTL公式，再对这些CTL公式用模型检验工具验证，若CTL公式中有一个通过了验证，则可得出该系统属性是一个空属性。

This approach is based on the separation and quantitative measurement of specific fractions, such as polar, or polymeric compounds or individual components, inch as pentane or hexanal, which are known to be typically produced during autoxidation.

该方法以特殊组分的分离和定量测量为基础，例如极性的或聚合物，个别成分，如戊烷或已醛，是自氧化过程中的典型产物。

And this is determined by the asymmetric localization of auxin efflux protein in plasma membrane of auxin transport cell.

目前已知的植物激素中只有生长素具有极性运输这一特征。

Methods Using Vibrio eoralliilyticus, Vibrio tubiashii, Vibrio parahaemolyticus and Vibrio earehariae as the tested bacteria, the inhibition zone and the minimal inhibitory concentration were measured. Results The extracts, extracted with ethyl acetate from the leaves of Nerium indicum Mill., Mangifera indica Linn., Melia azedarach L.

采用纸片法和试管法，以溶珊瑚弧菌、塔氏弧菌、副溶血弧菌、鲨鱼弧菌为供试菌株，测定中草药不同极性萃取部分的抑菌圈和最小抑菌浓度。

Methods Using Vibrio coralliilyticus, Vibrio tubiashii, Vibrio parahaemolyticus and Vibrio carchariae as the tested bacteria, the inhibition zone and the minimal inhibitory concentrationwere measured. Results The extracts, extracted with ethyl acetate from the leaves of Nerium indicum Mill., Mangifera indica Linn., Melia azedarach L.

采用纸片法和试管法，以溶珊瑚弧菌、塔氏弧菌、副溶血弧菌、鲨鱼弧菌为供试菌株，测定中草药不同极性萃取部分的抑菌圈和最小抑菌浓度。

According to the literatures and our experiments, appropriate conditions for the reaction of C60 with alkyl azide and the separation of adducts were obtained. The relationship between the structure and the chromatographic polarity of the products was also summarized.

根据文献报道和实验总结出了富勒烯与烷基叠氮化合物的反应条件和产物的分离条件，并对化合物结构与色谱极性的关系作了归纳总结。

The adjustment of X9241 is controlled by SCM according to the polarity of imbalance voltage signal from the output of the circuit bridge, and the adjusting of the balance of bridge and of controller is realized automatically.

单片机根据电压比较电路敏感电桥两臂不平衡电压输出信号的正负极性控制X9241，实现电桥平衡和控制器的自动调节。X9241采用二线串行I2C总线与单片机传递数据。

Insert four new AA-size alkaline batteries and make sure that the + and – on the batteries are aligned according to the polarity diagram inside the battery holder.

插入4节新的AA型碱性电池，使电池的正负极按电池架极性指示方向放入。

One is a micelle that may be depicted as a ball with the lipid polar groups on the outside and the hydrocarbon chains pointing together, the other a lipid bilayer.

一为胶束，它可以被描述为类脂极性基团在外而烃链挤到一起的小球；另一个即为类脂双层。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。