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Engineering and Applied Sciences

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Volume 6, Issue 3, June 2021

  • Composition Series of the Solvable Multiplicative Abelian Groups over a Regular Even nth Roots of Unity: A Classical Approach

    Alechenu Benard, Babayo Muhammed Abdullahi, Daniel Eneojo Emmanuel

    Issue: Volume 6, Issue 3, June 2021
    Pages: 49-54
    Received: 27 April 2021
    Accepted: 7 June 2021
    Published: 29 June 2021
    DOI: 10.11648/j.eas.20210603.12
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    Abstract: Solubility of algebraic structures is what gleaned the introduction of group theory, which later stems the other realms of abstract algebra viz: rings, fields and semigroup theories. The nth roots of unity is found in the most sensitive texts ever in the history of abstract algebra: Cauchy’s, Galois’ and Cayley’s. These three giant group theorists ... Show More
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  • Mechanical Loading Model of Main Bearing of Wind Turbine Based on Test Bench

    Xing Yang, Tao Zhang, Lei Li, Ya-qian Wang

    Issue: Volume 6, Issue 3, June 2021
    Pages: 55-65
    Received: 21 June 2021
    Accepted: 1 July 2021
    Published: 7 July 2021
    DOI: 10.11648/j.eas.20210603.13
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    Abstract: Wind-turbine main bearing has to withstand dynamic loads with different directions and different magnitudes in complex environments, and its stable operation has a vital impact on the performance of the entire wind turbine. Therefore, the fatigue strength test of wind turbine bearing is helpful to ensure the normal operation of the whole wind turbi... Show More
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