In modern wireless communication systems, the receiver is to recover with high sensitivity and accuracy baseband signal data or messages, which have been transmitted or broadcasted by way of modulation on a radio frequency (RF) carrier. However, these conventional high frequency receivers comprise a.....
[更多]
Antidepressants such as Prozac, Paxil and Zoloft, are characterized by an ability to selectively block reuptake of serotonin (5-HT). Selective NE-reuptake inhibitor antidepressants such as Tomoxetine and Vivalan have also been developed. Effexor and Serzone have been termed SNRI antidepressants beca.....
[更多]
Flue gases produced in combustion processes, such as coal-fired power plants, automobiles, smelters, etc., contains huge amount of nitrogen and sulfur oxides, carbon monoxide and particulates. They contribute significantly to atmospheric pollution and some of them are stringently controlled by legis.....
[更多]
Optical limiting materials show a non-linear transmittance of light, with transmission varying with the intensity of the incident radiation. Transmission is high at normal intensity, but low for intensive beams. Such materials are useful to protect, inter alia, optical elements, sensors, or the huma.....
[更多]
Voltage-controlled oscillators (VCO) are one of the most essential building blocks in phase-locked loops and frequency synthesizers, which are required in all data communication and telecommunication systems for generating highly accurate timing reference sources. However, existing VCOs need a suppl.....
[更多]
|< <- | [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] | -> >| |