通过转动电场的极性，DNA链会渐进式地前进，一次一对碱基对。
By flipping this field's polarity the DNA strand can be ratcheted along, one base pair at a time.
结果表明：参与式培训模式在调动学员积极性、提高素质、优化能力结构等方面效果较好。
Conclusion shown: The Participating Training mode plays a very important part in arousing teacher's enthusiasm, improving quality, optimizing the structure of ability.
汽巴公司发明了用极性电压法控制连续重氮化过程中亚硝酸盐加入速度的探测系统，赫斯特公司发明了连续式偶合装置。
Ciba has developed a nitrite feed rate gauge system for controlling process of continuous diazotization by polar voltage method, and Hoechst has developed newly an equipment for continual coupling.
本文介绍一种稳幅式双极性电流源，它是根据自动控制原理设计而成的，用于连续铸造熔渣的检测。
This paper introduces a stable amplitude bipolar current source. It was designed basing on the principle of automatic control. This circuit is suitable for continuous casting slag detection.
文中介绍了L 297芯片与双极性桥式电路的设计原理。
In this article, the design principle of L297 chip and dual bridge driving circuit is stated.
自助式薪酬是以员工为导向的薪酬模式，它的最大优点在于能从员工内心深处激发员工的工作积极性，从而有效提高员工的工作满意度。
The self-service salary model is the salary system that takes the staff as the guidance, and its biggest merit is it can stimulate staff's enthusiasm and enhances…
L 297芯片产生脉宽可调的脉冲相序信号，该信号作为双极性桥式功率驱动电路的输入信号，放大后驱动步进电机。
L297 chip generates pulse phase sequence signals of which the pulse width is adjustable. The signals are the input ones of dual bridge driving circuit and drive the stepper motor after amplification.
文章提出了基于检测行波电流波头极性的行波电流极性比较式方向保护。
A directional protection based on traveling wave current polarity comparison which is implemented by detecting the polarity of current wavefront of traveling wave is presented.
本文介绍了在一种新型便携式心电监护仪器中是如何采用单极性供电方式实现前置放大电路。
In this paper, the preamplifier circuit and the methods of anti-interference used for the portable ECG monitor were introduced. In this circuit, single power supply was be used.
在传统互补式金氧半薄膜电晶体的应用上，双极性传输是一基本且重要的特性。
Ambipolar conduction is an essential and fundamental property in the application of the conventional inorganic complementary metal-oxide-semiconductor thin film transistors.
设计并制造了一种新型的永磁式单相单拍运行步进电动机，它能在单极性电脉冲的控制下实现连续的起动和步进运动，电机绕组通电和断电时各转动一个步矩角。
A new type single-phase permanent-magnetic stepper motor is designed and manufactured. It realizes the stepping rotating action controlled by the inputting electric pulse's on-or-off point.
设计并制造了一种新型的永磁式单相单拍运行步进电动机，它能在单极性电脉冲的控制下实现连续的起动和步进运动，电机绕组通电和断电时各转动一个步矩角。
A new type single-phase permanent-magnetic stepper motor is designed and manufactured. It realizes the stepping rotating action controlled by the inputting electric pulse's on-or-off point.
应用推荐