The effect of intensity fluctuations on the measurement of the angular position of a radiation source by the opticoelectronic single—pulse method

1972 ◽  
Vol 15 (1) ◽  
pp. 40-44
Author(s):  
G. A. Andreev ◽  
R. M. Magid
Keyword(s):  
Radiation Source ◽  
Angular Position ◽  
Single Pulse ◽  
Pulse Method ◽  
Intensity Fluctuations

scholarly journals The effect of antimony presence in anodic copper on kinetics and mechanism of anodic dissolution and cathodic deposition of copper

2008 ◽  
Vol 44 (1) ◽  
pp. 107-114 ◽  
Author(s):  
Z.D. Stankovic ◽  
V. Cvetkovski ◽  
M. Vukovic
Keyword(s):  
Anodic Dissolution ◽  
Single Pulse ◽  
Pulse Method ◽  
Sulfate Solution ◽  
Electrode Reaction ◽  
Xrd Analysis ◽  
Lattice Parameter ◽  
Crystal Lattice Parameter ◽  
Cathodic Deposition ◽  
Anode Copper

The influence of the presence of Sb atoms, as foreign metal atoms in anode copper, on kinetics, and, on the mechanism of anodic dissolution and cathodic deposition of copper in acidic sulfate solution has been investigated. The galvanostatic single-pulse method has been used. Results indicate that presence of Sb atoms in anode copper increase the exchange current density as determined from the Tafel analysis of the electrode reaction. It is attributed to the increase of the crystal lattice parameter determined from XRD analysis of the electrode material.

The Shaft Torque of a Tandem Axial-Piston Pump

2006 ◽  
Vol 129 (3) ◽  
pp. 367-371 ◽  
Author(s):  
Noah D. Manring ◽  
Viral S. Mehta ◽  
Frank J. Raab ◽  
Kevin J. Graf
Keyword(s):  
Angular Position ◽  
Single Pulse ◽  
Torque Ripple ◽  
Piston Pump ◽  
Additional Parameter ◽  
Axial Piston Pump ◽  
Pump Design ◽  
Ripple Amplitude ◽  
Shaft Torque ◽  
Axial Piston

The objective of this study is to identify the best indexed position of two rotating groups within a tandem axial-piston pump for attenuating the torque ripple amplitude that is exerted on the shaft. By attenuating the torque ripple characteristics of the pump, other vibration aspects of the machine are also expected to be reduced. In particular, the objectives of this paper are aimed at reducing the noise that is generated by the pump. This paper begins by considering the theoretical torque ripple that is created by the discrete pumping elements of a single rotating group within an axial piston machine. From this analysis, an equation is produced that describes a single pulse for the torque ripple as a function of the average torque and the total number of pistons that are used within the rotating group. By superposing another rotating group on top of the first, and by indexing the angular position of one rotating group relative to the other, a second equation is produced for describing the theoretical torque ripple of a tandem pump design. This equation is also a function of the average shaft torque and the total number of pistons that are used within a single rotating group; however, an additional parameter known as the index angle also appears in this result. This index angle is shown to amplify or attenuate the amplitude of the torque ripple depending upon its value. From these results, it is shown that a proper selection of the index angle can reduce the torque ripple amplitude by as much as 75%.

Single Pulse Method for Measurement of Electrical Double Layer Parameters

1961 ◽  
Vol 32 (5) ◽  
pp. 588-592 ◽  
Author(s):  
J. S. Riney ◽  
G. M. Schmid ◽  
Norman Hackerman
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Single Pulse ◽  
Pulse Method

Single Pulse Method Of Multiwell Testing With Elimination Of Unknown Pressure Trends

1988 ◽  
Author(s):  
Dong Ying Min ◽  
Licheng Ren ◽  
Dakuang Han
Keyword(s):  
Single Pulse ◽  
Pulse Method

scholarly journals Single-Pulse Intensity Fluctuations by Cross-Correlation with Longitude of the Average Profile

1992 ◽  
Vol 128 ◽  
pp. 271-277
Author(s):  
M.V. POPOV ◽  
W. Sieber
Keyword(s):  
Spectral Analysis ◽  
Radio Emission ◽  
Cross Correlation ◽  
Regular Structure ◽  
Single Pulse ◽  
Pulse Intensity ◽  
Pulse Radio ◽  
Average Profile ◽  
Intensity Fluctuations

Single-pulse radio emission from pulsars has been observed to vary both in intensity and position inside the pulse window. In some cases the variations show a rather regular structure (drifting subpulses). Such a regular structure can clearly be studied by fluctuation spectral analysis. The analysis has identified some particular peculiarities in the fluctuation spectra at different longitudes of the pulse window in many pulsars (Backer 1973, Page 1973, Popov and Smirnova 1982). In pulsars with complex integrated profiles (PSR 1919+21, PSR 1237+25) narrow features in the fluctuation spectra vary strongly with longitude, at some longitudes being quite undistinguishable.

scholarly journals OPERATION OF THE RADIOLOCATION ANGULAR SYSTEM IN THE CONDITIONS OF THE SIGNAL CREATED BY COHERENT SOURCES OF RADIATION FROM TWO SPOTS

Doklady BGUIR ◽  
2019 ◽  
pp. 22-29
Author(s):  
A. A. Dyatko ◽  
S. M. Kostromitski ◽  
P. N. Shumski ◽  
I. N. Davydenkо
Keyword(s):  
Radiation Pattern ◽  
Radiation Source ◽  
Initial Conditions ◽  
Angular Position ◽  
Antenna System ◽  
Stationary States ◽  
Angular Coordinate ◽  
Radiation Sources ◽  
Input Signals ◽  
The Given

The purpose of the work, the results of which are presented within the framework of the article, was to analyze the operation of the radar goniometer system under the conditions of a signal generated by coherent radiation sources from two points in space (cross-eye interference). To achieve the goal in the present work, a study was made of the dependence of the settings of the goniometric system on the ratio of the parameters of the cross-eye jammer and the angular coordinate meter itself. As a goniometric system, an angular coordinate meter was used, operating by the method of amplitude instantaneous signal comparison. The studies were carried out by the method of theoretical analysis of the influence of the radiation pattern parameters of the antenna system of the meter on the result of measuring the angular position of a virtual radiation source. As a result, an equation is obtained that relates the angular position of the virtual radiation source with the radiation pattern parameters of the antenna system of the meter, the shape of which was approximated by a gaussian curve. To illustrate the functioning of the goniometric system at specific values of the parameters supplied to its input signals, the method of mathematical modeling was used. Modeling was performed for the given parameters, which determine both the position of the radiation sources in space and the algorithm of operation of the angular coordinate meter. Based on the results obtained, it is shown that the angular coordinate meter has three stationary states corresponding to the position of the virtual radiation source in space. It is shown that only two of these states are stable. The latter means that, depending on the initial conditions, the angular coordinate meter can fix one of the two possible positions of the virtual radiation source in space. The scientific novelty of this work is to establish a relationship between the position of the virtual radiation source in space and the parameters of the angular coordinate meter.

scholarly journals Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

2021 ◽  
Vol 6 (5 (114)) ◽  
Author(s):  
Yuriy Abramov ◽  
Oleksii Basmanov ◽  
Yaroslav Kozak
Keyword(s):  
Mathematical Model ◽  
Transfer Function ◽  
Electric Current ◽  
Integral Transformation ◽  
A Priori ◽  
Single Pulse ◽  
Pulse Method ◽  
Time Parameter ◽  
Sensing Element ◽  
Equations Of Mathematical Physics

This paper substantiates the pulse method for determining the time parameter for fire detectors with a thermoresistive sensing element ‒ the time constant. The method is based on using the Joule-Lenz effect, which manifests itself when an electric current pulse passes through the thermoresistive sensing element of fire detectors. Thermal processes in such a sensing element are described by a mathematical model that belongs to the class of equations of mathematical physics. The solution to the differential equation of this class was derived using the Hankel integral transformation and is represented as a series relative to the Bessel functions. The resulting solution is used to construct a mathematical model of a thermoresistive sensing element in the form of a transfer function, which takes the form of the transfer function of the inertial link. To trigger the thermoresistive sensing element of fire detectors, a single pulse of electric current in the shape of a rectangular triangle is used. The integral Laplace transformation was applied to mathematically describe the response of a thermoresistive sensing element to the thermal effect of such a test influence. To obtain information about the time parameter of fire detectors with a thermoresistive sensing element, the ratio of its output signals is used, which are measured in the a priori defined moments. A two-parametric expression was built to determine the time parameter of fire detectors; a verbal interpretation of the pulse method to determine it was provided. The implementation of this method ensures the invariance of the time parameter of fire detectors with a thermoresistive sensing element relative to the amplitude of a single pulse of an electric current, as well as relative to the parameter that is included in its transfer coefficient.

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