Determination of the main geometric parameters of a displacement reactor for laminar flow of the medium

1997 ◽  
Vol 33 (4) ◽  
pp. 358-361
Author(s):  
A. V. Zheranin
Keyword(s):  
Laminar Flow ◽  
Geometric Parameters ◽  
Displacement Reactor

Determination of the Geometric Parameters of a Parallel-Serial Rehabilitation Robot Based on Clinical Data

2020 ◽  
pp. 556-566
Author(s):  
Dmitry Malyshev ◽  
Santhakumar Mohan ◽  
Larisa Rybak ◽  
Gagik Rashoyan ◽  
Anna Nozdracheva
Keyword(s):  
Clinical Data ◽  
Geometric Parameters ◽  
Rehabilitation Robot

Multifrequency optimization method of measurement the frequency dependency of electrophysical parameters of dielectric and magnetodielectric coatings

2021 ◽  
pp. 54-61
Author(s):  
Aleksandr I. Kaz'min
Keyword(s):  
Frequency Dependence ◽  
Radio Wave ◽  
Optimization Method ◽  
Metal Substrate ◽  
Geometric Parameters ◽  
Microwave Range ◽  
Electrodynamic Modeling ◽  
Wave Methods ◽  
Electrophysical Parameters

The issues of experimental determination of electrodynamic parameters of existing and new synthesized materials and coatings used in the microwave range are highlighted. Problems arising from measurements of the electrophysical and geometric parameters of dielectric and magnetodielectric coatings, taking into account their placement on a metal substrate, by radio wave methods are considered. We present the new radio wave method of joint measurements of the frequency dependence of the complex permittivity, the frequency dependence of the complex magnetic permeability, and the thickness of plane-layered samples of dielectric and magnetodielectric coatings on a metal substrate. Determination of electrophysical and geometric parameters of the coating in the proposed method is reduced to minimizing the objective function constructed based on the discrepancy between the experimental and design theoretical values of the attenuation coefficients of surface electromagnetic wave fields on a grid of discrete frequencies. The simulation model of measurements is shown, implemented on the basis of the electrodynamic modeling system CST Microwave studio (Simulia corporation, USA) and the Matlab system. The results of simulation are presented to determine the frequency dependences of the electrophysical parameters and the thickness of a sample of a radio-absorbing coating on a metal substrate. Errors in the estimates of permittivity and permeability in the measurement frequency band 9–13.5 GHz, which are no more than 10 % with a confidence level of 0.95 with a mean square deviation of the noise level of 0.006, have been obtained. The proposed method can be in demand in various science-intensive areas – microelectronic, aerospace, mechanical engineering, etc.

DETERMINATION OF CHANGES IN GEOMETRIC PARAMETERS OF APPLE TREE CROWNS USING A MICRO-IRRIGATION SYSTEM

2021 ◽  
Vol 21 (1) ◽  
pp. 22
Author(s):  
L Bondarenko ◽  
O Karaiev ◽  
S Syshko ◽  
Yu Dmitriev
Keyword(s):  
Apple Tree ◽  
Irrigation System ◽  
Geometric Parameters ◽  
Tree Crowns ◽  
Micro Irrigation

Intellectual Measuring Complex for Control of Geometrical Parameters of Aviation Details

2020 ◽  
pp. 352-371
Author(s):  
Mariia Kataieva ◽  
Alina Yurchuk
Keyword(s):  
Computer Simulation ◽  
Measurement Error ◽  
Three Dimensional ◽  
Geometric Parameters ◽  
Measurement Process ◽  
Geometrical Parameters ◽  
Automated Method ◽  
Measuring Complex ◽  
Graphic Depiction

This chapter proposes a new automated method of measuring complex three-dimensional surfaces of aircraft parts in static and dynamic modes. The method allows conducting measurements in closed conditions and at the site of the aircraft disposition. The method consists in the continuous determination of the coordinates of the points of the surface of the detail and their representation in a three-dimensional graphic depiction. New methods of measuring the geometric parameters of parts with the complex spatial surface are suggested. This opens the prospect for the development of new ways of measuring geometric parameters of parts in real-time with high metrological characteristics and computer simulation of the measurement process. The differential-digital method is based on the suggested zero-coordinate principle of the measurement process which involves simultaneous parts availability check, and connects measurement result obtained which provided a reduction in the order of measurement error.

Geometric Indicators of Flexible Slice Lip

2015 ◽  
Vol 816 ◽  
pp. 188-194
Author(s):  
Krzysztof Talaśka ◽  
Ireneusz Malujda ◽  
Dominik Wilczyński ◽  
Jan Górecki ◽  
Paweł Tarkowski ◽  
...  
Keyword(s):  
Stress State ◽  
Cross Section ◽  
External Factors ◽  
Geometric Parameters ◽  
Geometric Features ◽  
Maximum Deflection ◽  
Paper Making ◽  
Definition Of ◽  
High Flexibility

The paper is thematically connected with paper making machines. This type of the machine is equipped with a head which has a flexible slice lip for skimming the pulp applied to produce the paper. The definition of geometric features of the slice lip is a key issue. The slice lip should be made of material which is resistant to external factors, and designers want to obtain a high flexibility of this element. It is possible to get a high flexibility by forming a proper shape of the slice lip. The paper presents the proposal of dimensionless geometric indicators which combine basic geometric parameters of the slice lip. These indicators are the following: indicator of the cross-section, indicator of the length and indicator of the length of the transverse notch. FEM strength analyses were done – the aim of these analyses was the determination of the stress state and maximum deflection of the slice lip. The authors have analysed the slice lip with holes for mounting the actuators and the slice lip and with transverse notches for increasing its flexibility. The results were presented in the form of graphs.

Simultaneous determination of free and total paclitaxel in blood in a three-phase laminar flow microchip

2020 ◽  
Vol 1627 ◽  
pp. 461391 ◽  
Author(s):  
Qidan Cai ◽  
Huaidong Peng ◽  
Jiang Meng ◽  
Youshao Yan ◽  
Yu Zeng ◽  
...  
Keyword(s):  
Laminar Flow ◽  
Simultaneous Determination ◽  
Three Phase

Laminar Flow-Through Cell for Enthalpimetric Determination of Biological Substrates

1981 ◽  
Vol 14 (15) ◽  
pp. 1269-1277 ◽  
Author(s):  
S. P. Dufrane ◽  
F. Quertain-defrise ◽  
M. Vandenbranden ◽  
A. Laudet ◽  
A. Laudet ◽  
...  
Keyword(s):  
Laminar Flow ◽  
Flow Through ◽  
Biological Substrates
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