Essays about: "zf"

Showing result 1 - 5 of 12 essays containing the word zf.

  1. 1. Prediction of life durability in friction for wet clutches of DCT gearboxes

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Lars-Johan Sandström; [2020]
    Keywords : wet clutch; DCT; Gearbox; Durability; Friction; Life; Dual Clutch Transmission;

    Abstract : Many new cars are equipped with automatic transmissions. These gearboxes often have a dual clutch transmission (DCT) that has a built-in wet clutch. The lubricants used in these gearboxes is often very advanced because it must take care of two systems, the wet clutch and the gears. There is always a strive to make the drain intervals longer. READ MORE

  2. 2. Investigation of magnetic order in nickel-5d transition metal systems

    University essay from Uppsala universitet/Molekyl- och kondenserade materiens fysik

    Author : Konstantinos Papadopoulos; [2019]
    Keywords : muSR; muons; skyrmions; magnetism; transition; spin; rotation; relaxation; resonance; thin; films; transition; metals; MBE; sputtering; XRR; reflectivity; molecular; beam; epitaxy; x; ray; TRIUMF; double; perovskite; longitudinal; transverse; nickel; Ni; asymmetry; positron; depolarization; chiral; lattice; helical; DM; interaction;

    Abstract : Double perovskite materials exhibit alterations in magnetic order through manipulation oftheir crystal structure. Certain ultra thin metallic bilayers can create an exotic magnetic stateof confined spin textures called skyrmions. In both cases, new atomic arrangements leadto new electrical and magnetic properties. READ MORE

  3. 3. A Study of Lattice Reduction Detection Techniques for LTE Systems

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Liping Wang; [2016]
    Keywords : LTE; MIMO; Lattice Reduction; MMSE; ZF; ML; Kronecker Model; Rayleigh Fading Channel; Technology and Engineering;

    Abstract : MIMO (Multiple Transmit and Multiple Receive) antenna techniques are widely used in the most recent wireless communication standards. For example, LTE (Long-Term Evolution), WiMAX (Worldwide Interoperability for Microwave Ac- cess) and IEEE 802.11n have recently been rolled out across the world. READ MORE

  4. 4. Full Duplex Multiuser MIMO with Massive Arrays

    University essay from Linköpings universitet/Linköpings universitet/Institutionen för systemteknikTekniska högskolan

    Author : Hussain Wannas; [2014]
    Keywords : Full-Duplex; Massive MIMO; MIMO; MU-MIMO;

    Abstract : Half-Duplex Multiuser Multiple-Input Multiple-Output (HD MU-MIMO) systemscurrently employed in communication systems are not experiencing the selfinterference(SI) problem but they are not optimal in terms of efficiency and interms of resources used (time and frequency resources). Ignoring the effect of largescalefading, we start by explaining the uplink (UL) and downlink (DL) parts ofthe MU-MIMO system and how the sum-rate is calculated. READ MORE

  5. 5. Usability Requirements and Deduced General Design Concepts for Mobile Solutions in Production Contexts at ZF

    University essay from Uppsala universitet/Institutionen för informationsteknologi

    Author : Simon Harhues; [2014]
    Keywords : ;

    Abstract : The thesis project collected usability requirements and formulated design principles for mobile solutions in an industrial production context. A second aim of the present thesis was to evaluate the applicability of the contextual design (CD) methodology in such a context. READ MORE