GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY

The aim. The study of formulas determination of the point coordinates by the inverse linear-angular intersection method. Previously, we investigated the possibility of using electronic total stations to control the geometric parameters of industrial buildings. The applied application of electronic total stations for high-precision measurements has been investigated as well. [Vivat, 2018]. The formula for optimal use of the device with certain accuracy characteristics relative to the measured basis is analytically proved and derived [Litynskyi, 2014]. Measurements on the basis of the II category are performed and theoretical calculations are confirmed. The possibility of achieving high accuracy in determining the segment by the method of linear-angular measurements is shown [Litynsky, 2015]. The influence of the angle value on the accuracy of determining the coordinates by the sine theorem is investigated and the possibility of optimizing the determination of coordinates by the method of inverse linear-angular serif by the formulas of cosines and sines is investigated [Litynskyi, 2019]. Method. Establishing a mathematical interconnection between measured values (distances and angles) with the required (flat coordinates of a point), differentiation and finding the minima of functions. Results.There were five formulas selected, of which six combinations had been created to calculate the increments of coordinates and to estimate their accuracy. Numerical experiments show that neither method has a significant advantage, which is supported by the results presented in the graphs and tables. It is worth noting one feature of the second method - in which it is possible to determine the increments of coordinates with an accuracy that exceeds the accuracy of measuring the sides. The possibility of optimizing the coordinate increments determination due to the choice of calculation formulas is considered. The possibility of increasing the accuracy of determination of the coordinates increments using different calculation formulas is researched. Consequently, it is suggested to optimize the choice of calculation formulas depending on the position of the desired point. The results of these studies can be used to create electronic total station or laser tracker application software in order to improve the accuracy of coordinate determination.

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Technics for experimental determination of CubeSat mass-centering and inertial characteristics

Space engineering and technology ◽

10.33950/spacetech-2308-7625-2021-3-83-95 ◽

2021 ◽

pp. 83-95

Author(s):

Igor V. BELOKONOV ◽

Elena V. BARINOVA ◽

Vitaly N. KLYUCHNIK ◽

Alexander V. IVLIEV ◽

Elisey A. BOLTOV

Keyword(s):

Initial Data ◽

Experimental Determination ◽

Key Words ◽

Theoretical Calculations ◽

Center Of Mass ◽

High Accuracy ◽

Design Parameters ◽

Moments Of Inertia ◽

Series Of Experiments

Due to inability to set a high accuracy of initial data in theoretical calculations of mass-centering and inertial characteristics of nanosatellites, a problem arises concerning the experimental determination of their actual values. For a number of reasons, the devices designed for large spacecraft are not appropriate for small ones. This paper describes a device for measuring the center of mass coordinates and moments of inertia developed at Samara University specifically for CubeSat nanosatellites, as well as a technology for experimental determination of the design parameters of nanoclass spacecraft. The accuracy of determining the design parameters using the proposed device is confirmed by a series of experiments with standards. Key words: nanosatellite, center of mass coordinates, moment of inertia, inertia tensor, measuring platform.

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DETERMINATION OF STRUCTURAL AND ELECTRONIC PARAMETERS OF ANTIMONY COMPLEX, FROM THEORETICAL CALCULATIONS

Proceedings of the 71st International Symposium on Molecular Spectroscopy ◽

10.15278/isms.2016.ti12 ◽

2016 ◽

Author(s):

Berna Catikkas ◽

Ismail Kosar

Keyword(s):

Theoretical Calculations ◽

Electronic Parameters ◽

Antimony Complex

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MANUFACTURE INVESTIGATION OF CARTRIDGE WITH BOTTOM-MOST PART FLANGE BY DIRECT EXTRUSION WITH COUNTERPUNCH. REPORT 18. EXPERIMENTAL CHECK OF THEORETICAL RESULTS FOR DIFFERENT HOLLOW RADIUSES AND BOTTOM-MOST PART THICKNESSES

Technology of metals ◽

10.31044/1684-2499-2020-0-9-16-23 ◽

2020 ◽

Vol 0 (9) ◽

pp. 16-23

Author(s):

A. L. Vorontsov ◽

◽

I. A. Nikiforov ◽

Keyword(s):

Strain Hardening ◽

Theoretical Calculations ◽

High Accuracy ◽

Geometric Parameters ◽

Strength Characteristics ◽

Experimental Check ◽

Hardening Material ◽

Direct Extrusion ◽

Theoretical Results

The results of an experimental check of the obtained theoretical formulae allowing us to determine the most important parameters of extrusion cartridges with a counterpunch for different hollow radiuses and bottom-most part thicknesses are presented. Characteristics of used tools, geometric parameters of extrusion experiments, strength characteristics of deformed materials and lubricants are described in detail. Both strain-hardening material and strain-unhardening material were studied. Methodology of the theoretical calculations is demonstrated in detail. High accuracy of the obtained design formulae was confirmed.

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Error determination of hidden flows by hydrostatic weighing in parts obtained by casting

Blanking productions in mechanical engineering (press forging, foundry and other productions) ◽

10.36652/1684-1107-2020-18-8-339-342 ◽

2020 ◽

pp. 339-342

Author(s):

M.S. Razumov ◽

P.V. Glazkov ◽

V.S. Kochergin ◽

A.S. Byshkin

Keyword(s):

Theoretical Calculations ◽

Casting Defects ◽

Casting Method ◽

Error Determination ◽

Hydrostatic Weighing ◽

Weighing Method ◽

Hydrostatic Weighing Method

The existing methods for detecting of casting defects and their disadvantages are considered. Hydrostatic weighing method is proposed for detecting of hidden fl aws by comparing the reference and calculated densities of the casting, method for calculating of the error is recommended. The adequacy of theoretical calculations is verifi ed experimentally

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The Degree of Oxidation of Graphene Oxide

Nanomaterials ◽

10.3390/nano11030560 ◽

2021 ◽

Vol 11 (3) ◽

pp. 560

Author(s):

Alexandra Carvalho ◽

Mariana C. F. Costa ◽

Valeria S. Marangoni ◽

Pei Rou Ng ◽

Thi Le Hang Nguyen ◽

...

Keyword(s):

Graphene Oxide ◽

Ab Initio ◽

State Of The Art ◽

High Accuracy ◽

Precise Determination ◽

Photoemission Spectroscopy ◽

Pristine Graphene ◽

X Ray ◽

Degree Of Oxidation

We show that the degree of oxidation of graphene oxide (GO) can be obtained by using a combination of state-of-the-art ab initio computational modeling and X-ray photoemission spectroscopy (XPS). We show that the shift of the XPS C1s peak relative to pristine graphene, ΔEC1s, can be described with high accuracy by ΔEC1s=A(cO−cl)2+E0, where c0 is the oxygen concentration, A=52.3 eV, cl=0.122, and E0=1.22 eV. Our results demonstrate a precise determination of the oxygen content of GO samples.

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Electrochemical device based on nonspecific DNAzyme for the high-accuracy determination of Ca2+ with Pb2+ interference

Bioelectrochemistry ◽

10.1016/j.bioelechem.2020.107732 ◽

2020 ◽

pp. 107732

Author(s):

Hui Wang ◽

Qingyao Luo ◽

Yiguang Zhao ◽

Xuemei Nan ◽

Fan Zhang ◽

...

Keyword(s):

High Accuracy ◽

Electrochemical Device ◽

Accuracy Determination

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Intra-scan intersection method for the determination of pointing biases of an airborne altimeter

International Journal of Remote Sensing ◽

10.1080/01431161.2015.1137989 ◽

2016 ◽

Vol 37 (3) ◽

pp. 648-668 ◽

Cited By ~ 1

Author(s):

Robert Harpold ◽

James Yungel ◽

Matthew Linkswiler ◽

Michael Studinger

Keyword(s):

Intersection Method

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IV. On the dynamical theory of incompressible viscous fluids and the determination of the criterion

Philosophical Transactions of the Royal Society of London. (A.) ◽

10.1098/rsta.1895.0004 ◽

1895 ◽

Vol 186 ◽

pp. 123-164 ◽

Cited By ~ 696

Keyword(s):

Singular Solution ◽

Physical State ◽

Theoretical Calculations ◽

Equations Of Motion ◽

Dynamical Theory ◽

Viscous Fluids ◽

Linear Functions ◽

Incompressible Viscous Fluids ◽

Theoretical Results

1. The equations of motion of viscous fluid (obtained by grafting on certain terms to the abstract equations of the Eulerian form so as to adapt these equations to the case of fluids subject to stresses depending in some hypothetical manner on the rates of distortion, which equations Navier seems to have first introduced in 1822, and which were much studied by Cauchy and Poisson) were finally shown by St. Venant and Sir Gabriel Stokes, in 1845, to involve no other assumption than that the stresses, other than that of pressure uniform in all directions, are linear functions of the rates of distortion, with a co-efficient depending on the physical state of the fluid. By obtaining a singular solution of these equations as applied to the case of pendulums in steady periodic motion, Sir G. Stokes was able to compare the theoretical results with the numerous experiments that had been recorded, with the result that the theoretical calculations agreed so closely with the experimental determinations as seemingly to prove the truth of the assumption involved. This was also the result of comparing the flow of water through uniform tubes with the flow calculated from a singular solution of the equations so long as the tubes were small and the velocities slow. On the other hand, these results, both theoretical and practical, were directly at variance with common experience as to the resistance encountered by larger bodies moving with higher velocities through water, or by water moving with greater velocities through larger tubes. This discrepancy Sir G. Stokes considered as probably resulting from eddies which rendered the actual motion other than that to which the singular solution referred and not as disproving the assumption.

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Based on Atomic Spectrometry for the Determination of Titanium Element in Molten Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.622-623.1528 ◽

2012 ◽

Vol 622-623 ◽

pp. 1528-1531

Author(s):

Cui Hong Ma ◽

Wei Qiang Zhang

Keyword(s):

Molten Steel ◽

Emission Spectroscopy ◽

Atomic Emission ◽

Lag Time ◽

High Accuracy ◽

Atomic Spectrometry ◽

Atomic Emission Spectrometry ◽

Emission Spectrometry ◽

Important Significance

Atomic emission spectrometry with high accuracy, short lag time, and low detection limit, it has been widely applied in various fields. The application of atomic emission spectrometry in the converter steelmaking process has an important significance to improve the smelting of speed and steel quality. This article describes the principle of atomic emission spectroscopy (AES) analysis. Spectra obtained by the experimental for qualitative analysis, detected molten steel containing titanium element.

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