Compression refrigerator

Compression refrigerator A refrigerator that relies on a compressor to increase the pressure of a refrigerant to achieve a refrigeration cycle. Compression refrigerator is composed of compressor, condenser (condenser), refrigeration heat exchanger (evaporator), expander or th-----

ooVoo video and audio conferences increase internationa…

ooVoo video and audio conferences increase international phone call capabilities in more countries OoVoo, a multi-point, cross-platform video and audio communication service provider, recently announced that it will expand its computer-to-phone calling functions and products -----

Why multi-band OFDM is more suitable for high-speed UWB…

Why multi-band OFDM is more suitable for high-speed UWB communication than direct sequence (DS) technology Part 1: Bandwidth and multipath 1 Introduction About three years ago, the US Federal Communications Commission issued a historic Report & Order report that allocat-----

Application of OLED in the field of head-mounted displa…

Application of OLED in the field of head-mounted display Head-mounted displays with video glasses and portable theaters as important carriers have been more and more widely used and developed. It has excellent advantages in digital soldiers, virtual reality, virtual reality g-----

Rejection of pirated genuine navigation map identificat…

Rejection of pirated genuine navigation map identification methods The "Congress International Anti-Piracy Working Group" composed of more than 70 US lawmakers recently announced the "2009 International Piracy Watch List", and China, Russia, Canada, Spain,-----

Design of Ultra Low Intermediate Frequency CMOS Down Mi…

Design of Ultra Low Intermediate Frequency CMOS Down Mixer The low-IF architecture is widely used in the design of receivers due to its strong image suppression capability and ease of integration. As one of the important modules of the receiver, the mixer's main function -----

How to distinguish true and false OLED color screen

How to distinguish true and false OLED color screen As the end of the year approaches, major IT vendors will prepare for a new round of battlefield battles. In the MP3 market some time ago, due to the fierce competition, nearly one hundred production workshops were eliminated-----