scholarly journals MICROWAVE INSTALLATIONS WITH NON-TRADITIONAL RESONATORS FOR COLLECTING FUR FROM RABBITS’ SKIN

2018 ◽  
Vol 13 (2) ◽  
pp. 144-150
Author(s):  
Евгений Шамин ◽  
Evgeniy Shamin ◽  
Галина Новикова ◽  
Galina Novikova ◽  
Ольга Михайлова ◽  
...  
Keyword(s):  
Technological Process ◽  
High Frequency ◽  
Hair Follicles ◽  
Maximum Diameter ◽  
Internal Cavity ◽  
Dielectric Heating ◽  
Microwave Technology ◽  
High Quality ◽  
High Electric Field Strength

The paper describes the developed ultrahigh-frequency installations with toroidal and conical resonators used for separating rabbits’ fur from hides providing high electric field strength, continuity of the technological process while observing radio-tightness and improving the quality of fluff by improving microwave technology and ultra-high-frequency installations. The technological process of collecting hair from rabbits’ skins in a microwave device with toroidal resonators is due to the weakening of the retention of the hair cover in hair follicles during the selective dielectric heating of the components of the skin and the spraying of the brine. In a biconical resonator, it is possible to obtain the highest possible high quality factor due to small longitudinal currents in the walls. The presence of gaps in the outermost regions provides the ability to move the skin through the internal cavity of the biconical resonator, where the emitters are located in the region of its maximum diameter.

The basis of quality of sheep pelts and fur products is morphological features of the skin of sheep

2020 ◽  
pp. 50-57
Author(s):  
I. Dmitrik ◽  
G. Zavgorodnyaya
Keyword(s):  
Mechanical Strength ◽  
Breaking Load ◽  
Hair Follicles ◽  
Morphological Features ◽  
High Density ◽  
Fat Cells ◽  
High Quality ◽  
Histological Features ◽  
Weakened Zone

The morphological and histological features of the skin and wool cover of sheep as the basis for the quality of fur sheep pelts have been studied. The most important properties of sheep pelts (uniformity, thinness and density of wool) are provide the possibility of producing high-quality fur semi-finished products from them. However, the features of the histostructure of fine-wool sheep determine the low mechanical strength of the “facial” layer of skin. As a result, the “front” layer during processing often cracks to the upper border of the reticular layer or even peels off from the latter, making the sheep pelt unsuitable for use on fur products. These defects in fur practice are called “cracking” and “peeling” of the facial layer. They are mainly peculiar to sheep pelts of fine-wooled sheep. In these animals due to the high density and tone of the coat, the roots and hair follicles, root vaginas, secretory departments, excretory ducts of the glands and other structures occupy a significant share of the volume in the thickness of the Pilar layer (up to 25–30 %). The share of fibrous structures remains less volume, and these structures themselves are relatively weakly developed, located loosely and loosely intertwined with each other. The accumulations of fat cells that occur here also cannot be attributed to skin-strengthening elements. In fine-fleece sheep the pilar layer is on average 60 % of the thickness of the dermis. Therefore, more than half of its thickness is a weakened zone. The strength of the “front” layer is not the same in different fine-wool breeds of sheep and in different animals within the breed. For example, the average breaking load for cod of the “front” layer in Soviet Merino pelts is 1,25 kg, and in Precoce is 2,49 kg.

scholarly journals Laser Welding Of Finned Tubes Made Of Austenitic Steels

2015 ◽  
Vol 60 (3) ◽  
pp. 1807-1812
Author(s):  
M. Stolecki ◽  
H. Bijok ◽  
Ł. Kowal ◽  
J. Adamiec
Keyword(s):  
Laser Welding ◽  
Austenitic Steel ◽  
Technological Process ◽  
Welded Joints ◽  
Austenitic Steels ◽  
Tube Production ◽  
High Quality ◽  
Manufacturing Costs ◽  
Finned Tubes

Abstract This paper describes the technology of welding of finned tubes made of the X5CrNi1810 (1.4301) austenitic steel, developed at Energoinstal SA, allowing one to get high quality joints that meet the requirements of the classification societies (PN-EN 15614), and at the same time to significantly reduce the manufacturing costs. The authors described an automatic technological line equipped with a Trumph disc laser and a tube production technological process. To assess the quality of the joints, one performed metallographic examinations, hardness measurements and a technological attempt to rupture the fin. Analysis of the results proved that the laser-welded finned tubes were performed correctly and that the welded joints had shown no imperfections.

Numerical Study on the CZ Silicon Melt Convection for High Efficient Solar Cell

Solar Energy ◽  
2003 ◽  
Author(s):  
Tetsuo Munakata ◽  
Satoshi Someya
Keyword(s):  
Magnetic Field ◽  
Solar Cell ◽  
High Frequency ◽  
High Quality ◽  
High Efficient ◽  
Silicon Melt ◽  
Frequency Magnetic Field ◽  
High Frequency Magnetic Field ◽  
Melt Convection

Conversion efficiency of solar cell is strongly affected by quality of substrate and the quality of substrate is influenced by melt convection if the substrate crystal is grown by melt growth technique. Therefore, melt convection control techniques are important to produce a high quality single crystal. In this paper, we have proposed a high frequency magnetic field applied CZ method and investigated the effect of high frequency magnetic field on silicon melt convection. The result reveals that the high frequency magnetic fields affect the tendency of the melt convection: until certain intensity of the high frequency magnetic field, the melt convection is suppressed and above such intensity of the high frequency magnetic field, the melt convection intensity is enhanced. This result indicates that the melt convection can be controlled by the high frequency magnetic field and the high quality silicon single crystals will be grown by this method.

scholarly journals Research of technical and technological operations of irrigation and development of initial requirements to the technical means of their realization

2021 ◽  
Author(s):  
V. M. Мaliarchuk ◽  
◽  
A. O. Migalev ◽  
V. V. Sidorenko ◽  
E. M. Fedorchuk
Keyword(s):  
Technological Process ◽  
Irrigated Agriculture ◽  
Modern State ◽  
Separate Component ◽  
High Quality ◽  
Irrigation Methods ◽  
Ecological Requirements ◽  
Irrigation Purpose ◽  
Quality Indexes

Authors as a result of researches got informative, statistical and experimental data which allowed to ground and form initial requirements on the machine technological operations of irrigation. Purpose of researches – to conduct the analysis of practice of application of multi-supporting sprinkling-machines which are used in technologies of the irrigated agriculture, define the high-quality indexes of implementation of technological process and construction features for forming of requirements on the technical and technological operations of irrigation. Methods of researches: empiric, measuring, theoretical, mathematical and statistical, analysis of existent normative base. Results of researches. In the process of researches prospects, problems and terms of application of multi-supporting sprinkling-machines, are analyzed, the modern state and tendencies of improvement of these machines are considered. The brought classification over and structural signs of sprinkling-machines, basic charts and methods of irrigation, the review of constructions of sprinkling machines and technological features of their application, certain high-quality and operating-technological indexes of work of machines, are given. An operating in Ukraine normative base is analyzed in relation to requirements to the broad-cut sprinkling-machines at their application in the technique and technology operations of irrigation. It is educed as a result of analysis, that an investigational normative base touches mainly requirements to the construction of sprinkling machines and their separate component parts, methods of tests and requirements of safety. General initial requirements on technical and technological operations of irrigation, which touch quality of implementation of technological process, operating-technological and ecological requirements, requirements to reliability of and other absent. On the basis of the conducted researches and tests, experimental and informative data, which were taken as base, certain and initial requirements are reasonable on the technique and technology operations of irrigation at the use of broad-cut multisupporting sprinkling-machines, were got. Conclusions: the necessity of application of sprinkling-machines is set taking into account ecological requirements and the basic rules of their use are certain with the purpose of warning of erosive processes of soils .initial requirements are Certain and reasonable on the technical and technological operations of irrigation at the use of broad-cut multi-supporting sprinkling machines.

High-Quality Fast QPOs from Magnetars: An Electric Circuit Model

2011 ◽  
Vol 20 (2) ◽  
Author(s):  
Alexander Stepanov ◽  
Valery Zaitsev ◽  
Esko Valtaoja
Keyword(s):  
High Frequency ◽  
Electric Circuit ◽  
Physical Parameters ◽  
Hot Electron ◽  
High Quality ◽  
Electron Positron ◽  
Quasiperiodic Oscillations ◽  
Electric Circuit Model ◽  
Very High

AbstractAn interpretation of high-frequency (20-2400 Hz) fast quasiperiodic oscillations of magnetars in terms of an equivalent electric circuit is given. Observed periods and the very high quality of quasi-periodic oscillations are explained. The oscillation source is represented as a hot electron-positron plasma in a ‘trapped fireball’, a system of current-carrying magnetic loops of various sizes. The physical parameters of a ‘trapped fireball’ in the flare of SGR 1806-20 (2004 December 27) are estimated.

scholarly journals Creation of an automated system for measuring technological parameters in the rubber production line

2019 ◽  
Vol 81 (3) ◽  
pp. 225-230
Author(s):  
V. S. Zhirkova ◽  
N. L. Kleymenova ◽  
O. P. Dvoryaninova ◽  
L. I. Nazina ◽  
S. V. Ershov
Keyword(s):  
Production Process ◽  
Technological Process ◽  
Production Line ◽  
High Performance ◽  
Automated System ◽  
Automation System ◽  
Rubber Compound ◽  
Technological Parameters ◽  
High Quality

The introduction of an automated control system on the production line of the rubber compound will reduce the influence of the human factor on the quality of rubber products, which will lead to a significant improvement in the operational and physico-mechanical characteristics of the final product. Also, the development of this system will create a centralized data collection system for creating reports on technological operations of the production process. To obtain high-quality products, it is necessary to control and maintain all technological parameters during equipment operation at the same level, modern means of registration and parameter management. In the production of rubber compounds, it is necessary to ensure a high degree of automation of the main technological equipment, which will make it possible to more accurately dose the ingredients, including dusting ones, to conduct the process in a given temperature regime for the time required to obtain high-quality products. The implementation of automatic control during the use of high-performance equipment is not possible without the use of measuring and control equipment. The article is devoted to the problem of automation of a system for measuring technological parameters on a rubber compound production line in order to improve the quality of manufactured products. The analysis of the technological process is carried out, the controlled parameters of not only the modes of the technological process, but also of raw materials, semi-finished products and finished products are selected. The choice of instruments and local automation equipment is presented, as well as the choice of an industrial microcontroller with which control is carried out at the lower level of an integrated automation system. A functional diagram of the automation of the rubber compound production process is proposed, which will allow to obtain a product with quality indicators corresponding to the regulated level.

scholarly journals Creation of a New Design of a System for Feeding raw Cotton to a Cylinder

2019 ◽  
Vol 8 (4) ◽  
pp. 12753-12759
Keyword(s):  
Technological Process ◽  
Mass Exchange ◽  
High Frequency ◽  
Theoretical Studies ◽  
Innovative Technologies ◽  
New Methods ◽  
High Frequency Waves

This article provides an analysis of the study of a regulated technological process for preparing raw cotton and its components for storage. The regulation of the measures taken to preserve the quality of cotton products is given. The results of theoretical studies of heat-mass exchange issues are presented with the aim of analyzing the possibility of intensifying the uniformity of heating and drying of raw cotton. Based on the analysis and research, new methods of drying raw cotton and its components using high-frequency waves, which are new innovative technologies, are proposed

scholarly journals Press Advertising – Varieties and Sub-Varieties. Methods of Promoting the Press

2017 ◽  
Vol 35 (5) ◽  
pp. 185-197
Author(s):  
Joanna Mikosz
Keyword(s):  
Mass Media ◽  
High Frequency ◽  
High Quality ◽  
The Press ◽  
A Company ◽  
Advertising Information

In the text entitled “Press advertising – varieties and sub-varieties. Methods of promoting the press”, the author discusses press advertising, which is a fast developing mass-media phenomenon. Modernity has granted press advertising a high quality of print and paper, as well as Infinite possibilities of combining various promotional forms with the press. The author argues that press advertising is one of the best ways in which a company can communicate with the market. Its advantage is, above all, a high frequency of distributing the contents and the possibility of conveying accurate advertising information in vast quantities.

Defects of Golden and Luster Decorations on Glass

2008 ◽  
Vol 39-40 ◽  
pp. 571-574
Author(s):  
Helena Hradecká ◽  
Dana Rohanová
Keyword(s):  
Thin Layer ◽  
Technological Process ◽  
Glass Surface ◽  
Defect Formation ◽  
Optical Microscope ◽  
High Quality ◽  
Sodium Potassium ◽  
High Durability ◽  
Commercial Glass

Decoration of glass by a thin layer of golden or luster solutions demands a high quality of the glass surface, decorating solutions, as well as technological procedure. In the presented work the authors monitored causes of defect formation for two types of luster decorations and two types of commercial glass gilding preparations with various Ag contents. The results have shown that in case of an unsuitable technological process the layers on the glass demonstrate insufficient adhesion, colors different from the required shade or matt spots. The resistance of golden decorations against damage was further tested by washing of decorated samples in a dishwasher. In case of alkaline washing the decorations were more resistant on sodium-potassium glass and on a previously dealkalised glass surface. A high durability against washing was found for the golden decoration with high Ag content. The quality of layers was investigated with a spectrophotometer, optical microscope and SEM and compositions of the original and decorated glasses were determined with RTG-F and SEM/EDS analyses.

Simulation of vibration piercing of pipe blank at press

2020 ◽  
Vol 76 (11) ◽  
pp. 1128-1138
Author(s):  
S. R. Rakhmanov
Keyword(s):  
High Frequency ◽  
Deformation Zone ◽  
Pipe Blank ◽  
Equipment Operation ◽  
Metal Deformation ◽  
Technological Tool ◽  
High Frequency Vibrations ◽  
Pipe Blanks ◽  
Wave Phenomena

In some cases, the processes of piercing or expanding pipe blanks involve the use of high-frequency active vibrations. However, due to insufficient knowledge, these processes are not widely used in the practice of seamless pipes production. In particular, the problems of increasing the efficiency of the processes of piercing or expanding a pipe blank at a piercing press using high-frequency vibrations are being solved without proper research and, as a rule, by experiments. The elaboration of modern technological processes for the production of seamless pipes using high-frequency vibrations is directly related to the choice of rational modes of metal deformation and the prediction resistance indicators of technological tools and the reliability of equipment operation. The creation of a mathematical model of the process of vibrating piercing (expansion) of an axisymmetric pipe blank at a piercing press of a pipe press facility is an actual task. A calculation scheme for the process of piercing a pipe plank has been elaborated. A dependence was obtained characterizing the speed of front of plastic deformation propagation on the speed of penetration of a vibrated axisymmetric mandrel into the pipe workpiece being pierced. The dynamic characteristics of the occurrence of wave phenomena in the metal being pierced under the influence of a vibrated tool have been determined, which significantly complements the previously known ideas about the stress-strain state of the metal in the deformation zone. The deformation fields in the zones of the disturbed region of the deformation zone were established, taking into account the high-frequency vibrations of the technological tool. It has been established that the choice of rational parameters (amplitude-frequency characteristics) of the vibration piercing process of a pipe blank results in significant increase in the efficiency of the process, the durability of the technological tool and the quality of the pierced blanks.

Sign in / Sign up

Export Citation Format

Share Document