极性的

For the circuit to work,of course,polarities of both the base and collector circuits have to be correctforward bias applied to the base circuit,and the collector supply connected so that the polarity of the common element(the emitter is the same from both voltage sources.

对于电路的工作来说，当然，基极和集电极电路是需要更正的（正向偏置电压加在基极电路和集电极电路以便于发射极的电压极性和电压源的电压极性是相同的。

It shows in the test of simulation sample that the ratio of interference inhibition is higher than 5000, and the minimum detected discharge magnitude is 0.06pC. Again, a method of polarity discrimination and high interference inhibition for the dual-input and single-output damped oscillation signal is proposed firstly.

在脉冲鉴别法的基础上，通过详细分析脉冲鉴别的原理和双端输入、单端输出信号的极性，首次提出了对双端输入、单端输出衰减振荡的局部放电信号进行极性鉴别的方法和极大干扰信号抑制方法。

To eliminate common-mode voltage of cascaded multi-level inverter, three kinds of phase-difference SVM based on left and right bridge vectors are proposed firstly. From these three modulations, equivalent SPWM components are deduced, and the unipolarity and bipolarity of output waveforms are analyzed. 2π/3 PD-SVM (phase-difference space vector modulation) is testified be unipolar.

为消除级联型多电平逆变器的输出共模电压，首先提出了基于左、右桥臂矢量的三类相差空间矢量调制(space vector modulation，SVM)技术，数学推导出三类调制技术的等效正弦脉宽调制(sine pulse width modulation，SPWM)的调制波，并分析了其各自相电压输出波形的单、双极性，证明2π/3相差SVM必为单极性调制。

The results show that, the chalcone moiety of this CD derivative was located in the less polar CD cavity in the aqueous solution and a"self-inclusion"complex was formed which gave a higher fluorescence emission.

并对上列体系在外界环境极性变化过程中多元配合物的形成和解离；不同醇类化合物因极性与尺寸上的差别而给包结行为带来的影响、进而显示出光谱行为的变化等进行了深入的研究和讨论。

Analyzing basic characteristics of aluminium electrolytic capacitors we have discussed performances of high-frequency low-impedance poleless aluminium capacitors, have developed new operating electrolyte s and selecting appropriate materials we have made high-frequency low-impedance poleless aluminium electrolytic capacitors with maximum temperature 85℃ and lifetime 3000h.

从铝电解电容器的基本性能分析入手，对高频低阻抗无极性铝电解电容器的特性进行了分析和讨论，开发出新型的工作电解液，并选择合适的材料，研制出了可用于85℃，3000h的高频低阻抗无极性铝电解电容器。

The number of components in steam distillation extraction for chafu was about 13,mainly containing Thymyl methyl ether,Beta-selinene and so on,which occupied over 18% in all components.

水蒸气蒸馏法和超临界萃取测定柴胡挥发油成分比较发现，鉴别峰的数量相对较少，水蒸汽蒸馏法提取的柴胡挥发油中鉴定出13个主要成分，占挥发油组分的18％以上，主要成分为百里基甲基醚、β—蛇床烯等；超临界萃取的柴胡低极性成分中鉴定出9个主要成分，占低极性组分的20％以上。

We find that, during the course of coating, thermodynamic cortrol can influence efficiency and life for column more effectively than kinetic cortrol; the rinse and laying out after coated zwitterionic surfactant can also influence the thickness and uniformity of layer coated.

三。探索了 EIC 体系的实际应用在 EIC 体系的应用方面研究了无机、有机电解质和极性化合物在该体系的色谱保留行为，探索了一些无机、有机阴离子和极性有机分子在 EIC 体系的色谱分离。

The results suggest that the primary sequence has the same symmetries as their tertiary structure.

氨基酸的特性，像二级结构形成的倾向性，极性和非极性残基在蛋白质序列中的位置等都在形成蛋白质的三级结构方面起着重要的作用。

In addition to setting the clock frequency, the master must also configure the clock polarity and phase with respect to the data. Freescale's SPI Block Guide [1] names these two options as CPOL and CPHA respectively, and most vendors have adopted that convention.

除了设置时钟频率，主设备同样需要设置数据传输相关的时钟极性以及相位。freescale'sSPI的手册命名这分别以cpol以及cpha来标志时钟的极性以及相位，大部分的芯片厂商采用了这种协定。

Introduced the analysis and processing of a transformer with three-phase winding of DC resistance imbalanced defect,through further analysis of the after processed DC resistance,believed the transformer still existing the polarity selector"-" side contact deficiency,further on finding out the method of comparing corresponding DC resistance difference rate at each tap has the advantage to detect the polarity selector defect more accurately more sensitively and more directly.

对一台变压器出现三相绕组直流电阻不平衡缺陷的分析和处理情况做了介绍；通过对处理后直流电阻的进一步分析认为，该变压器还存在极性选择开关&－&向侧仍有接触不良方面的缺陷，遂进一步提出，如采用比较各对应分接位置下直流电阻差率的方法能够有更准确、灵敏、直接地发现极性选择器方面缺陷的优点；还提出了测试变压器绕组直流电阻时的几点注意事项。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。