搜索结果
找到约 26 项符合
maintain 的查询结果
按分类筛选
书籍 Mobile+Communications+An+Introduction+to+New+Media
Do you have a mobile phone? We think you probably do, one way or another. We
would also guess that you might use it for many diff erent things in the course of your
everyday life—as a telephone certainly, but also as an address book, as a clock or
watch, as a camera, or now as a connection to your ...
书籍 Telecommunications Regulation
Regulation is a pervasive feature of the telecommunications services industry
today. Government-appointed regulators and judicial or quasi-judicial bodies
oversee it in countries at all stages of economic development. Its primary
purpose is to encourage, nourish and maintain competition in nation ...
书籍 ESD-Phenomena-and-the-Reliability
As we enter the next millennium, there are clear technological patterns. First, the
electronic industry continues to scale microelectronic structures to achieve faster
devices, new devices, or more per unit area. Secondly, electrostatic charge, electrostatic
discharge (ESD), electrical overstress (E ...
书籍 Smart+Grid
The term “ smart grid ” defi nes a self - healing network equipped with dynamic optimiza-
tion techniques that use real - time measurements to minimize network losses, maintain
voltage levels, increase reliability, and improve asset management. The operational data
collected by the smart grid and ...
笔记 音频放大器设计
This design uses Common-Emitter Amplifier (Class A) with 2N3904 Bipolar Junction Transistor.
Use “Voltage Divider Biasing” to reduce the effects of varying β (= ic / ib) (by holding the Base voltage constant) 
Base Voltage (Vb) = Vcc * [R2 / (R1 + R2)] 
Use Coupling ...
技术资料 基于数字信号处理的超声手术刀电源控制电路设计与实现
目的:自主研制一款超声手术刀电源控制系统,以减少能量的消耗,维持手术刀的正常温度。方法:对超声换能器在谐振附近的等效电路建立模型,并设计基于数字信号处理(DSP)的超声手术刀的硬件控制系统。结果:经对电源控制系统的电路和工作性能测试,生成的电流和电压的有效值等参数,能够及时调整电源的频率,并达到预期的功能指标,使 ...