查询词典 modulation

The three valued logic modulation technique is usually used in the conventional current source PWM rectifier, and the SPWM control waveform can be obtained by the interphase decoupling.

传统的电流型PWM整流器一般采用三值逻辑SPWM调制技术，通过相间解耦预处理的方法获得实际PWM控制波形，过程复杂且直流电流利用率较低。

In the article introduced the monolithic integrated circuit to the electric motor the control, elaborated the crystal thyratron accent presses the velocity modulation the principle by and its the control system principle of work, introduced the hardware system design and the software system establishment.

文中介绍了单片机对电动机的控制，阐述了晶闸管调压调速的原理以及其控制系统的工作原理，介绍了硬件系统的设计和软件系统的编制。

In pulse code modulation, a basic group of channels assembled by time division multiplexing .

在脉码调制技术中，通过时分多路器而组合在一起的一种信道基本群。

Evidently, there is another motion to be concerned with and that is the propagation of the modulation envelope

显然，还应当考虑另外一种运动，那就是调制包络的传播。

The role of a-Si:H sublayers is to interrupt the continuous growth and limit the thickness of pc-Si:H sublayers. The a-Si:H sublayers are deposited by two methods, one is fabricated by low hydrogen dilution ratio R = 4, and the second is deposited by pulse-wave modulation plasma with turn-on time (TON = 25 ms) and plasma turn-off time (TOFF = 75 ms).

阻断层所用的非晶矽薄膜采用两种方式制作，第一种是利用低氢稀释比(R = 4)制作的非晶矽，第二种是利用脉波调变电浆开启时间及开关时间分别为25ms及75ms pulse(25ms/75ms所制作的非晶矽。

In this thesis, the heterojunction with intrinsic hydrogenated amorphous silicon thin layer ( heterojunction with intrinsic thin layer: HIT) solar cells are investigated. The solar cell structure of p/i/n are fabricated. The substrate is a typical 4-inch n-type wafer with (100) crystal orientation, 1~10 ohm-cm and about 525 μm thickness. The p and i a-Si:H layers are deposited by a 13.56 MHz plasma enhanced chemical vapor deposition. The i a-Si:H layers are especially deposited by pulse-wave modulation plasma technique with fixed plasma turn-off time toff = 10 ms and changed plasma turn-on time ton= 10 to 40 ms to selectively control the different silicon to hydrogen bonding configurations. The effect of various Si:H bonds on the performance of HIT solar cells are explored.

中文摘要本论文针对异质接面薄本质层(heterojunction with intrinsic thin layer： HIT)太阳电池进行研究，采用一般典型四英吋晶向为(100，厚度约为525 μm，电阻率约为 1~10 ohm-cmn型矽晶圆为基板，制作p/i/n太阳电池，p及i层薄膜以13.56 MHz电浆加强化学气相沈积，i层并采用脉波调变电浆技术，在固定电浆关闭时间toff = 10 ms及改变电浆开启时间由ton = 10 ms 至40 ms条件下制作具有不同矽氢键结微结构的氢化非晶矽薄膜以探讨不同矽氢键结对太阳电池性能的影响。

The modulation works like an on/off toggle switch .

调制工作类似于板手开关。

The toggle switch is significant because no further modulation is necessary, Cantor says.

坎托说：「这种捺跳开关是有意义的，因为它不需更多的调控。

A practical method of the modulation transfer function of lens with CCD is introduced in this paper.

介绍了一种用CCD测量透镜MTF的实用方法。

An effective method for improvement transient response in pulse-width modulation current source converter is studied.

给出了单相和三相变频器的实验结果，与采用其他方法的变频器相比，该方法的变频器电源电流的暂态响应得到了有效改善。

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。