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1.
It is found that under, a double-pulse optical breakdown, the energy of the main pulse with a wavelength of 532 nm is diminished by up to two times, provided that the preionization of the target surface is performed by a laser pulse with a wavelength of 248 nm. It is shown that the pulse of a shorter wavelength can act as the managing one to specify the optical-breakdown onset and coordinates. 相似文献
2.
Bukin A. N. Moseeva V. S. Marunich S. A. 《Theoretical Foundations of Chemical Engineering》2020,54(5):1102-1106
Theoretical Foundations of Chemical Engineering - The development of a thermostable hydrophobic platinum catalyst is an important scientific and practical problem. The purpose of this work is to... 相似文献
3.
Yu. N. Kul’chin S. S. Voznesenskii E. L. Gamayunov A. S. Gurin A. A. Korotenko A. Yu. Mayor O. A. Bukin 《Measurement Techniques》2008,51(1):40-43
A fiber optic fluorometer with dipping module intended for use in studying the contents of phytoplankton in sea water at different
depths is described. Using the device, it is possible to carry out continuous measurements under the conditions of the strongly
variable illuminance of the sea. Results of measurements of the fluorescence of sea water by means of the newly developed
fluorometer are presented.
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Translated from Izmeritel’naya Tekhnika, No. 1, pp. 27–29, January, 2008. 相似文献
4.
S. L. Bukin V. P. Kondrakhin V. N. Belovodsky V. N. Khomenko 《Journal of Mining Science》2014,50(1):101-107
The authors analyze excitability of polyharmonic vibrations in a single-body vibration machine. The developed mathematical model of the vibration system accounts for an elastic component element included in the design of the unbalance vibration exciter drive. The operating limits, frequency content and effect of the main design factors on the flow data of the vibration machine are examined. It is found that superharmonic vibration largely contributes to the polyharmonic spectrum at certain frequencies, depending on the stiffness of the elastic component element of the clutch connecting the vibration exciter and the rotary drive. 相似文献
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Geints YE Zemlyanov AA Kabanov AM Bykova EE Apeksimov DV Bukin OA Sokolova EB Golik SS Ilyin AA 《Applied optics》2011,50(27):5291-5298
We report on the experiments on the interaction of gigawatt femtosecond laser pulses with suspended millimeter-sized water droplets. The transparent droplets experienced laser-induced breakdown and explosive boiling up and emitted a broadband radiation. This radiation covers the spectral range from 450 to 1100?nm and consists of the spectrum of laser pulse scattered and transformed by the droplet due to self-phase modulation and plasma emission produced in water during photoionization. The droplet emission spectrum showed remarkable broadening at all viewing angles and is maximal in the direction of the laser exit from the droplet. The enlargement of the droplet results in additional spectral spreading of the emitted radiation. The depth and amount of laser pulse spectral self-transformations upon propagation through the water droplet are simulated by means of numerical calculations. 相似文献
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L. A. Bukin O. V. Kozlovskaya G. P. Tertishcheva 《Refractories and Industrial Ceramics》1971,12(7-8):541-543
Conclusions During sintering in vacuum the porosity and gas permeability of the material sharply diminishes, and the strength is increased. Firing at 1250°C in vacuum produces high-density specimens with a porosity of about 2%, and with a compressive strength of 60 kg/mm2.Translated from Ogneupory, No. 8, pp. 62–65, August, 1971. 相似文献
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