Sökning: "?i l?i"

Visar resultat 1 - 5 av 115 avhandlingar innehållade orden ?i l?i.

  1. 1. Radio Resource Optimization for OFDM-based Broadband Cellular Systems

    Författare :Lei Lei; Di Yuan; Michael Reyer; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The rapid growth of users’ traffic demand in broadband wireless communication systems requires high-speed data transmission and intelligent resource allocation approaches. The Third Generation Partnership Project-Long Term Evolution (3GPPLTE) has standardized multiple access (MA) schemes for 4G cellular networks. LÄS MER

  3. 2. From Orthogonal to Non-orthogonal Multiple Access : Energy- and Spectrum-Efficient Resource Allocation

    Författare :Lei Lei; Di Yuan; Angelakis Angelakis; Erik Bergfeldt; Xiaoli Chu; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The rapid pace of innovations in information and communication technology (ICT) industry over the past decade has greatly improved people’s mobile communication experience. This, in turn, has escalated exponential growth in the number of connected mobile devices and data traffic volume in wireless networks. LÄS MER

  4. 3. Learning-based Control for 4D Printing and Soft Robotics

    Författare :Qinglei Ji; Lei Feng; Lihui Wang; Xi Vincent Wang; Yong Chen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3D Printing; 4D Printing; Soft Robots; Machine Learning; Reinforcement Learning; Control; Production Engineering; Industriell produktion;

    Sammanfattning : Exploiting novel sensors and actuators made of flexible and smart materials becomes a new trend in robotics research. The studies on the design, production, and control of the new type of robots motivate the research fields of soft robots and 4D printed robots. LÄS MER

  5. 4. Articular and epiphyseal cartilage : its formation, maintenance and repair

    Författare :Lei Li; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Long bones develop via a series of ordered processes, initiated from mesenchymal stem cell condensation, cartilage anlagen formation, followed by central cell hypertrophy and vascular invasion and the finalized by the formation of primary and secondary ossification centers (SOC), where the latter is also called endochondral ossification. As long bone develops, it can be distinguished in to several morphologically distinct parts: the main shaft of a long bone, called diaphysis; a narrow disc of growth plate, providing a continuous supply of chondrocytes for longitudinal growth; a thin layer of articular cartilage at the ends of epiphysis, supporting joint movement, and a SOC, sandwiched between the two pieces of cartilage. LÄS MER

  7. 5. A study of wireless communications with reinforcement learning

    Författare :Wanlu Lei; Ming Xiao; Chenguang Lu; Mikael Skoglund; Geoffrey Ye Li; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reinforcement learning; wireless communications; decentralized learning; beam tracking; machine learning; Förstärkningsinlärning; trådlös kommunikation; decentrali- serad inlärning; strålspårning i mmvåg; maskininlärning; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning :  The explosive proliferation of mobile users and wireless data traffic in recent years pose imminent challenges upon wireless system design. The trendfor wireless communications becoming more complicated, decentralized andintelligent is inevitable. LÄS MER