A three - dimensional simulation of current flow in a bipolar transistor . ( image courtesy of the national coordination office for information technology research and development 模拟双极性电晶体的三维电流流动（感谢国家资讯科技与研发协调办公室提供） 。
Scientists say they ' ve identified a flawed gene that appears to promote manic - depression , or bipolar disorder , a finding that could eventually help guide scientists to new treatments 科学家称他们已经发现了一种引发躁郁症，或称双极性疾患的破坏性基因。
The implication of dramatic conflicts contains deep life revelation , whereas the conflicts among characters constitute life ' s ambi - polarity 摘要戏剧冲突的内涵在于深刻的人生揭示，而人存在的矛盾冲突构成了人生的双极性，戏剧冲突与人生的双极性存在着同构关系。
Semiconductor devices ; discrete devices ; part 7 : bipolar transistors ; section two : blank detail specification for case - rated bipolar transistors for low - frequency amplification 半导体器件.分立器件.第7部分:双极性晶体管.第2节:低频放大用的额定环境双极性晶体管的空白详细规范
This paper simulates and analyses the torque pulsation because of the modulation frequency and speed variation under ambipolar pulse width modulation , at the same time the results are given 本文对双极性调制的无刷直流电动机仿真分析了转速和调制频率对转矩影响同时给出仿真结果。
Semiconductor devices ; discrete devices ; part 7 : bipolar transistors ; section one : blank detail specification for ambient - rated bipolar transistors for low and high - frequency amplification 半导体器件.分立器件.第7部分:双极性晶体管.第1节:低频和高频放大用的额定环境晶体管的空白详细规范
The power includes the following characters : being able to output signal - pole , double - pole and multi - pole spwm waves ; being able to output square wave ; being able to modulate frequency and modulate output voltage range 该电源具有如下特点：可以输出单极性、双极性和混合极性spwm波；可以输出方波；可调频调幅。
Battery structure and manufacture parameters are improved , new type of bipolar ni / mh battery is prepared , resistance distribution is studied , and method of electrode modification is improved 本文主要针对双极性mh / ni电池设计及制造过程中存在的问题,改进了电池的结构和制作参数,制备了新型双极性mh / ni电池。
Scientists say they ' ve identified a flawed gene that appears to promote manic - depression , or bipolar disorder , a finding that could eventually help guide scientists to new treatments 科学家称他们已经发现了一种引发躁郁症，或称双极性疾患的破坏性基因。这项发现可以最终在躁郁症的治疗方面为科学家们提供指导性帮助。
The wavelet transform is discussed in the code - width estimation ; and the feasibility and effectiveness of the code - width estimation using the spectrum of the bipolar base - band signal are proved 在参数估计中，主要讨论了小波变换算法在基带信号码元宽度估计中的应用以及利用双极性基带信号的频谱估计码元宽度的可行性和有效性。
