Procházení Acta Polytechnica. 2023, vol. 63, no.1 dle data publikování

Zobrazují se záznamy 1-7 z 7

    • Estimation of stresses in a massive granite using laser ultra-sonic testing and stress memory effect 

      Autor: Kašpar , Ondřej; Kravcov, Alexander; Štoller, Jiří; Kubeček, Petr; Vnuk, Radovan; Zušťák, Zbyněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This paper addresses in-situ stress-estimation methods based on the Kaiser effect. The physical and mechanical properties of granite, diorite, and granodiorite samples selected at different depth intervals of the core ...

    • Femtosecond laser processing of advanced technical materials 

      Autor: Primus, Tomáš; Novák, Martin; Zeman, Pavel; Holešovský, František
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Ultra-short pulsed laser ablation may be used for high-precision machining with very low thermal influence on the processed materials. Due to this reason, lasers are increasingly used for processing of advanced materials, ...

    • Self-interference cancellation in underwater acoustic communications systems using orthogonal pilots in IBFD 

      Autor: Naman, Hala A.; Abdelkareem, Ammar E.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This paper proposes a Self-interference (SI) cancellation system model of Underwater acoustic (UWA) communication for in-band full-duplex (IBFD) technology. The SI channel is separated from the Far channel by exploiting a ...

    • Heat transfer characteristics of double pipe heat exchanger having externally enhanced inner pipe 

      Autor: Vijayaragavan, Balasubramanian; Asok, Suyambu Pandian; Shakthi Ganesh, Chandrasekar Ramalekshmi
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      An investigation on enhancement of heat transfer is carried out for a double pipe heat exchanger in which the outer wall of the inner pipe is provided with circumferential labyrinth passages. Rectangular and triangular ...

    • Induction motor mechanical defect diagnosis using DWT under different loading levels 

      Autor: Bouzida, Ahcene; Abdelli, Radia; Boudouda, Aimad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      The information extraction capability of the widely used signal processing tool, FFT for diagnosing induction machines, is commonly used at a constant load or at different levels. The loading level is a major influencing ...

    • Comparative study of state space averaging and PWM with extra element theorem techniques for complex cascaded DC-DC Buck converter 

      Autor: Shete, Sangeeta; Joshi, Prasad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Until now, most commonly used state space averaging and PWM techniques have been applied to different converter topologies and their advantages and disadvantages were stated. However, the superiority of an analytical ...

    • Linearisation of a second-order nonlinear ordinary differential equation 

      Autor: Maharaj, Adhir; Leach, Peter G. L.; Govender, Megan; Day, David P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      We analyse nonlinear second-order differential equations in terms of algebraic properties by reducing a nonlinear partial differential equation to a nonlinear second-order ordinary differential equation via the point ...