Reproducing the units of energy-brightness spectral density, radiation strength spectral density, and energy intensity spectral density for continuous radiation in the wavelength range 0.22?10.6 ?m

1983 ◽  
Vol 26 (12) ◽  
pp. 982-985 ◽  
Author(s):  
N. A. Morozov ◽  
V. V. Bacherikov ◽  
L. V. Vlasov ◽  
L. N. Samoilov ◽  
V. I. Sapritskii ◽  
...  
Keyword(s):  
Spectral Density ◽  
Wavelength Range ◽  
Energy Intensity ◽  
Continuous Radiation ◽  
Energy Brightness

scholarly journals Analysis Of Vibration And Oscillation Sources Of Machine-Tractor Aggregates Units

2019 ◽  
pp. 72-79
Author(s):  
I. V. Galych
Keyword(s):  
Spectral Density ◽  
Soil Fertility ◽  
Dynamic Loading ◽  
Labor Productivity ◽  
Agricultural Production ◽  
Energy Intensity ◽  
Experimental Studies ◽  
Ecological Indicators ◽  
Active Damping ◽  
Agricultural Machine

With the increasing speed of machine-tractor aggregates, the energy intensity of tractors and labor productivity increases. In turn, this leads to an increase in the dynamic loading of nodes and components of machine-tractor aggregates, an increase in the level of oscillation and the emergence of dynamic and vibrational loads, which negatively affects both the node and components of the tractor or the aggregate, and the implementation of agrotechnical requirements. An analysis of recent studies and publications has shown that the introduction of energy-intensive technology into agricultural production leads to a decrease in soil fertility due to spraying and re-compression by engines, which aggravate agro-ecological indicators. In the study, the analysis of sources of vibrations and oscillations of elements of machine-tractor aggregates is presented. The frequency of influence on machine-tractor aggregates of various agrofones at different speeds of motion is analyzed. Experimental studies have determined the spectral density of the hook effort of the tractor during cultivating on disk field and steam. The results of experimental studies of the active damping system are presented. The result of the study is the suggestion to reduce the oscillations of the tractor and agricultural machine to justify comprehensive measures that prevent deterioration of the conditions of the unit. Fluctuations of the tractor, caused by sources of excitations, lead to deterioration of the performance of agrotechnical requirements due to the non-straightforwardness of the trajectory of motion, redevelopment of soil. To reduce the vibrations of the tractor and the agricultural machine it is necessary to substantiate the complex measures that prevent deterioration of the conditions of the unit

Special state standard for power-luminance spectral-density unit of radiations in the 0.05?0.25-? wavelength range

1977 ◽  
Vol 20 (10) ◽  
pp. 1391-1395
Author(s):  
S. I. Anevskii ◽  
V. I. Kvochka ◽  
V. S. Panasyuk ◽  
L. N. Samoilov ◽  
Yu. K. Samoshenkov ◽  
...  
Keyword(s):  
Spectral Density ◽  
Wavelength Range ◽  
State Standard ◽  
Special State Standard ◽  
Density Unit

Reproducing the units of radiation strength and energy intensity for continuous-wave continuous-spectrum optical radiation in the wavelength range 0.2?10.6 ?m

1983 ◽  
Vol 26 (12) ◽  
pp. 985-988 ◽  
Author(s):  
L. V. Vlasov ◽  
V. V. Bacherikov ◽  
N. A. Morozov ◽  
L. N. Samoilov ◽  
V. I. Sapritskii ◽  
...  
Keyword(s):  
Continuous Spectrum ◽  
Wavelength Range ◽  
Optical Radiation ◽  
Energy Intensity ◽  
Continuous Wave

Measuring system for reproducing and transmitting unit of spectral density of energy brightness in the vacuum ultraviolet

1976 ◽  
Vol 19 (9) ◽  
pp. 1286-1291
Author(s):  
S. P. Velikanov ◽  
V. I. Kvochka ◽  
V. S. Panasyuk ◽  
B. M. Stepanov ◽  
Yu. M. Tereshkin ◽  
...  
Keyword(s):  
Spectral Density ◽  
Vacuum Ultraviolet ◽  
Measuring System ◽  
Energy Brightness

Variation of the amount of hydrogen along the galactic ridge

1967 ◽  
Vol 31 ◽  
pp. 171-172
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Surface Brightness ◽  
Milky Way ◽  
Neutral Hydrogen ◽  
Line Of Sight ◽  
Optical Surface ◽  
Hydrogen Density ◽  
Continuous Radiation ◽  
Galactic Longitude

The integralNHof neutral-hydrogen density along the line of sight is determined from the Kootwijk and Sydney surveys. The run ofNHwith galactic longitude agrees well with that of thermal continuous radiation and that of the optical surface brightness of the Milky Way.

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

Application of pyrometer and standard sample to determine surface temperature of studied materials

2019 ◽  
pp. 9-13
Author(s):  
V.Ya. Mendeleyev ◽  
V.A. Petrov ◽  
A.V. Yashin ◽  
A.I. Vangonen ◽  
O.K. Taganov
Keyword(s):  
Composite Material ◽  
Surface Temperature ◽  
Relative Error ◽  
Wavelength Range ◽  
Standard Sample ◽  
A Priori ◽  
Temperature Changes ◽  
Surface Temperatures ◽  
Relative Errors ◽  
Normal Emissivity

Determining the surface temperature of materials with unknown emissivity is studied. A method for determining the surface temperature using a standard sample of average spectral normal emissivity in the wavelength range of 1,65–1,80 μm and an industrially produced Metis M322 pyrometer operating in the same wavelength range. The surface temperature of studied samples of the composite material and platinum was determined experimentally from the temperature of a standard sample located on the studied surfaces. The relative error in determining the surface temperature of the studied materials, introduced by the proposed method, was calculated taking into account the temperatures of the platinum and the composite material, determined from the temperature of the standard sample located on the studied surfaces, and from the temperature of the studied surfaces in the absence of the standard sample. The relative errors thus obtained did not exceed 1,7 % for the composite material and 0,5% for the platinum at surface temperatures of about 973 K. It was also found that: the inaccuracy of a priori data on the emissivity of the standard sample in the range (–0,01; 0,01) relative to the average emissivity increases the relative error in determining the temperature of the composite material by 0,68 %, and the installation of a standard sample on the studied materials leads to temperature changes on the periphery of the surface not exceeding 0,47 % for composite material and 0,05 % for platinum.

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