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Why my mobile phone makes this noise near an audio speaker?

You probably heard this strange robotic noise from your speakers when a cellphone was nearby and about to receive a call or an SMS. But do you know why this audible noise interference happens and why the sequences of buzz is always exactly the same? 683 more words

Các phương thức chống xung đột trong hệ thống RFID

    Có thể phân chia các giao thức chống xung đột tín hiệu trong hệ thống RFID như một trong các sơ đồ bên dưới.

Hình 1: Các kỹ thuật đa truy nhập và phương thức chống xung đột. 402 more words

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Next Generation Technology : 5G

During the last few decades, mobile communications have significantly contributed to the economic and social developments of both developed and developing countries. Mobile communications from an indispensable part of the daily lives of millions of people in the world; a situation which is expected to continue and become even more undeniable in the future. 94 more words