In this paper, we propose two new multiple-access schemes for downlink system based on the combination of orthogonal frequency division multiplexing (OFDM) with index modulation (IM), namely OFDM-IM. first proposed technique, namely, Index Modulation Multiple-Access (IMMA), OFDM subcarriers are divided into multiple sets and each set is assigned to a specific user, their data bits transmitted v...

The employment of university graduates has always been a matter great concern to educational administrative departments and governments at all levels. EPI (employment prosperity index) is weather vane that reflects the situation labor market, it also an important reference for national economic situation. This paper constructs college students’ from different aspects, such as environment, emplo...