双极性

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。

The system has eight input channels and the bipolarity output, and it stores waveform by district.

系统有八个输入通道，在波形的存储时采用分区储存波形，D/A转换器采用双极性输出。

The results show that the scheme of the bipolarity address code and the higher laser power can improve the system performance.

比较结果表明，双极性地址码方案可提高系统性能；另外，提高光功率还可改善系统性能。

The paper puts forward the mechanism of combined waveform and computation of a SPWM area center equivalent.Harmonic of double pole SPWM waveform is analyzed in this paper.

文中给出了按照面积中心等效法合成SPWM波形的机理以及面积中心等效算法，并对双极性面积中心等效法生成的SPWM波形进行了谐波分析。

The main circuit adopts the threephase bipolarity contravariant bridge circuit composed of power bipolar-transistor.

其逆变器依据正弦波脉宽调制技术，主电路采用三相双极性逆变桥式电路，逆变管采用电力场效应晶体管。

In the dissertation, a bipolar coding scheme based on the above feature and a recognition method based on correlation matrix memory are presented.

论文中提出了基于目标主要散射中心之间相对距离分布的双极性二元编码方案和基于相关矩阵记忆网络的目标识别方法。

Clinical trials show a tendency for those with Cyclothymic Disorder, particularly those with an early onset, to develop bipolar disorder over time.

由於症状轻微，常常没有被诊断出来常常诊断为双极性二型的病人回想起他们早有可以诊断为轻度躁郁症的症状临床试验显示轻度躁郁症尤其是早发型的经过时间会转变成躁郁症15% to 50%会转变成躁郁症

"It is very important for patients, healthcare providers, and society to understand that there are many reasons for emotional distress and depression beyond a diagnosable major mood disorder," Dr. Muzina told Medscape Psychiatry, adding that other psychiatric conditions may be mistaken as major depression or bipolar disorder, and not every experience of emotional human suffering is a "mental disorder."

这对病患、健康照护者与社会来说都是非常重要的，要了解情绪紧绷与忧郁是有很原因的，且这超过了可诊断的重大情绪异常；Muzina医师向Medscape精神医学表示，其他精神疾病状况可能被误认为重郁症或双极性异常，并不是每一位经历情绪痛苦的人都罹患"精神异常"。

Figure 1-14 shows an NPN transistor and a PNP transistor in the feedback path to provide dual polarity operation.

图1-14示出反馈通路采用一个NPN晶体管和一个PNP晶体管来实现双极性工作。

Using 3-channel bipolar ECG signals simultaneously recorded from different positions of ventricular epicardium, the inversion of VF dynamical model is explored.

利用从心室肌表面不同位置同时记录到的三通道双极性电信号反演VF动力学模型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。