Wyniki wyszukiwania - BazTech

1

Study on self-repairing and non-diffraction of Airy beams in slant atmospheric turbulence

Li Y.-Q., Wang L.-G.

Optica Applicata

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2018

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Vol. 48, nr 3

435--447

EN

The Airy beams propagation in atmospheric turbulence along a slant path was simulated numerically, based on the split-step Fourier method. Also, the self-repairing and non-diffraction characteristics of Airy beams were investigated and compared with beams propagation on a horizontal path. The effects of parameters including zenith angle, propagation distance, radii of Gaussian aperture and turbulence intensity on the two characteristics of beams were revealed. Additionally, the two characteristics of the Airy beam were compared with those of a Bessel–Gauss beam. The results showed that the two beams obscured by Gaussian apertures can be repaired after propagating some distance along a slant path. However, the non-diffraction characteristic of an Airy beam was stronger than that of a Bessel–Gauss beam and the amplitude attenuation rate of the Bessel–Gauss beam was greater than that of the Airy beam in the process of self-repairing. Results obtained can provide a theoretical basis for an outdoor experiment as well as theoretical guidance for various practical applications including laser communications, laser warning systems, and remote sensing.

2

Evaluation of the self-repairability of epoxy-cement composite

Łukowski P., Adamczewski G.

Ochrona przed Korozją

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2013

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nr 1

7--12

EN

The paper deals with the issue of the self-repairability of epoxy-cement building composites. The methods of obtaining such material have been presented, including the modification of a cement composite using an epoxy resin without a hardener. The methodology of testing the self-repairability of the building composite has been described. Selected results of investigations have also been presented.

PL

W artykule omówiono zagadnienie samonaprawialności kompozytu betonopodobnego oraz koncepcję uzyskania takiego materiału. Przedstawiono aktualnie wdrażane metody uzyskania samonaprawialnego kompozytu betonowego, w tym modyfikację kompozytu cementowego dodatkiem żywicy epoksydowej bez utwardzacza. Omówiona została metodyka badań samonaprawialnego kompozytu epoksydowo-cementowego, a także przedstawiono wyniki badań takiego materiału w zakresie samonaprawialności oraz niektórych innych podstawowych cech mechanicznych.

3

Self-repairing of polymer-cement concrete

Łukowski P., Adamczewski G.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2013

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Vol. 61, nr 1

195-200

EN

Self-repairing means ability to the total or partial recovering of the properties which were worsened as a consequence of damage of the material. The subject of the paper is evaluation of ability to self-repair of a cement composite modified with epoxy resin without a hardener. The methodology of investigation of self-repairing building materials, developed by the authors, has been described, with controllable enforcing of the limited weakening of the material. Also, the self-repair degree has been defined as the measure of self-repairing ability of the building composites. The material model of the epoxy-cement composite has been developed on the basis of the tests results. The material optimization of the composite towards the maximum self-repairing ability has also been carried out. The results of investigation have confirmed the possibility of self-repairing of the cement composite modified with the epoxy resin without hardener. The conclusion and further research needs in the range of the self-repairing epoxy-cement composites have been pointed out.

4

Monitorowanie i diagnozowanie procesów i obiektów technicznych w systemach zapewnienia bezpieczeństwa technicznego

Zbrowski A., Kozioł S.

Bezpieczeństwo i Technika Pożarnicza

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2011

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Nr 1

59-68

PL

W artykule przeprowadzono analizę czynników oddziaływujących na rozwój systemów monitorowania i diagnozowania procesów i obiektów technicznych. Przedstawiono powiazania systemów technicznych z międzynarodowymi i krajowymi standardami i uregulowaniami prawnymi. Opisano role systemów w procesie rozwoju urządzeń i technologii wspomagających bezpieczna, racjonalna i ekonomiczna eksploatacje infrastruktury technicznej, zwiększająca bezpieczeństwo techniczne i publiczne. Wskazano kierunki rozwoju urządzeń i metod diagnostycznych pozwalających na monitorowanie, zapobieganie i likwidowanie zagrożeń technicznych lub zmniejszenie częstości i skutków awarii zarówno w procesach produkcyjnych jak te w czasie eksploatacji maszyn i urządzeń.

EN

The paper discusses the analysis of factors influencing the development of systems for monitoring and diagnosis of procesess and technical objects. Presented solutions of technical systems are compatible with national and international standards and legal regulations. The role of the systems in the process of development of devices and technologies is described that supports safe, rational and economical maintenance of technical plant thus increasing technical and public safety. Also the directions of further development of devices and test methods are pointed out that allow monitoring, protection and elimination of technical hazards or decrease in frequency and results of failures both in production processes and in maintenance of machines and devices.