Telecommunication 2 min read
Time-division multiplexing
Multiplexing also may be conducted through the interleaving of time segments from different signals onto a single transmission path—a process…
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Telecommunication 2 min read
Multiplexing
Because of the installation cost of a communications channel, such as a microwave link or a coaxial cable link, it is desirable…
Telecommunication 6 min read
Modulation
In many telecommunications systems, it is necessary to represent an information-bearing signal with a waveform that can pass accurately through…
Telecommunication 6 min read
Channel Encoding
As described in Source encoding, one purpose of the source encoder is to eliminate redundant binary digits from the digitized signal. The strategy…
Telecommunication 6 min read
Telecommunication
Telecommunication, science and practice of transmitting information by electromagnetic means. Modern telecommunication centres on the problems involved in transmitting large volumes of…
Systems and controls 2 min read
Other methods of machining
Ultrasonic machining (USM) In USM, material is removed from a workpiece with particles of abrasive that vibrate at high frequency in a…
Systems and controls 4 min read
Electrical-discharge machining (EDM)
EDM involves the direction of high-frequency electrical spark discharges from a graphite or soft metal tool, which serves as an electrode,…
Systems and controls 6 min read
Adaptive control
Improvements in CNC machine tools depend on the refinement of adaptive control, which is the automatic monitoring and adjustment of machining conditions…
Systems and controls 3 min read
Frequency response
Hearing aid Hearing aid, device that increases the loudness of sounds in the ear of the wearer. The earliest aid was the…
Systems and controls 3 min read
Damping
Damping, in physics, restraining of vibratory motion, such as mechanical oscillations, noise, and alternating electric currents, by dissipation of energy. Unless a child keeps pumping a…