Prohlížení Acta Polytechnica. 2023, vol. 63, no.1 dle názvu
Zobrazují se záznamy 2-7 z 7
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Estimation of stresses in a massive granite using laser ultra-sonic testing and stress memory effect
(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
(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, ... -
Heat transfer characteristics of double pipe heat exchanger having externally enhanced inner pipe
(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
(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 ... -
Linearisation of a second-order nonlinear ordinary differential equation
(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 ... -
Self-interference cancellation in underwater acoustic communications systems using orthogonal pilots in IBFD
(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 ...