Sökning: "Jingjing Chen"

Hittade 3 avhandlingar innehållade orden Jingjing Chen.

  1. 1. Heat-transfer Enhancement for Slurries from Biogas Plants− Properties, processes, and thermal systems

    Författare :Jingjing Chen; Xiaoyan Ji; Bona Lu; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; heat-transfer enhancement; slurry; rheological properties; computational fluid dynamics; twisted tubes; biogas production; Energiteknik; Energy Engineering;

    Sammanfattning :  Biomethane production from renewable residues with anaerobic digestion gains increasing attention as a crucial alternative to petroleum fuels. It has been vigorously developed, but the large amounts of subsidy from the government indicate that the process efficiency needs to be further improved. LÄS MER

  2. 2. Multi-Gigabaud Millimeter-Wave Communication - Challenges and Solutions

    Författare :Jingjing Chen; Chalmers University of Technology; []
    Nyckelord :phase noise; high-order modulation; 5G; multi-gigabaud; PAM-4; high data rate; white noise; multi-gigabit; phase noise mitigation; 64-QAM; mobile backhaul; VCSEL driver; Frequency multiplier; modem; high frequency oscillator; multiplicative noise; power detector; fronthaul; millimeter-wave communication;

    Sammanfattning : A major challenge in future mobile networks is to overcome the capacity barrier in wireless communication. Utilizing large bandwidth at higher frequencies is key to enabling capacity upgrade for next generation mobile networks (5G). LÄS MER

  3. 3. Multi-Gigabit Radio System Demonstrators for Next Generation Mobile Networks

    Författare :Jingjing Chen; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fronthaul; E-band; modem; millimeter-wave transmission; mobile backhaul; multi-gigabit; differential coding; phase noise mitigation; FPGA; 16-QAM; DQPSK; point-to-point radio; centralized baseband;

    Sammanfattning : Driven by the exponential growth in mobile broadband subscriptions and mobile data traffic, transport capacity of mobile networks has to be enhanced accordingly, including wireless backhaul and the emerging fronthaul networks. Utilizing wide bandwidth is the most straightforward way to capacity upgrade. LÄS MER