scholarly journals STATISTICAL PROCESSING TECHNIQUE AND INTERPRETATION OF THE RESULTS OF EXPERIMENTAL RESEARCHES OF FILTRATION CONSOLIDATION

2019 ◽  
pp. 36-41
Author(s):  
O.V. Ageykina ◽  
V.V. Vorontsov ◽  
R.R. Sufyanov
Keyword(s):  
Statistical Processing ◽  
Processing Technique ◽  
Filtration Consolidation ◽  
Experimental Researches

scholarly journals ЕКСПЛУАТАЦІЙНІ ВЛАСТИВОСТІ ГОТЕЛЬНИХ МАХРОВИХ РУШНИКІВ

2021 ◽  
pp. 43-51
Author(s):  
А. С. Паршин ◽  
С. І. Арабулі ◽  
А. Т. Арабулі
Keyword(s):  
Mechanical Properties ◽  
Materials Science ◽  
Experimental Studies ◽  
Statistical Processing ◽  
Physical And Mechanical Properties ◽  
Basic Principles ◽  
Textile Materials ◽  
Textile Fabrics ◽  
High Level ◽  
Experimental Researches

Assessment of the providing level of hotel facilities by quality terry towels based on a comprehensive study of the operational properties of terry textile fabrics. Methodology. Theoretical and experimental researches are based on the basic principles of textile materials science. During experimental studies, modern methods were used to determine the physical and mechanical properties of textile materials, as well as methods of mathematical planning and statistical processing of the experimental results. Results. The state and norms for the provision of hotel facilities in Ukraine with terry towels are given. The assortment of hotel terry towels has been analyzed. The main factors of the formation of a modern assortment of textile materials for hotel terry towels are considered. The focus is on the classic range of double nap terry fabrics for hotel towels. The analyses of the physical and mechanical properties of modern fabrics for hotel towels are present. Indicators characterizing the interaction of textile with liquid moisture have been experimentally determined. The paper presents the results of determining the wear resistance of fabrics after 1, 5 and 10 cycles "wash-ironing". Scientifi c novelty. The data of the physical and mechanical properties of the classic assortment of textile materials for hotel terry towels are systematized. It has been experimentally proven that the assortment of cotton terry textile materials, which is currently available on the Ukrainian market and is used for the manufacture of hotel terry towels, provides a high level of comfort and durability of towels. Practical value. The modern assortment of textile materials for hotel terry towels is analyzed, taking into account the peculiarities of the operational situation of consumption.

Statistical Processing of Different Sounds of Vocalizing Fish and Mammals to Estimate Their Population Size With Two Acoustic Sensors

2019 ◽  
Vol 53 (4) ◽  
pp. 68-80 ◽  
Author(s):  
Shaik Asif Hossain ◽  
Monir Hossen
Keyword(s):  
Population Size ◽  
Statistical Processing ◽  
Environmental Dna ◽  
Marine Species ◽  
Statistical Signal Processing ◽  
Fish Population ◽  
Processing Technique ◽  
Population Estimation ◽  
Human Interaction ◽  
Signal Processing Technique

AbstractFish and mammals have an enormous impact on marine ecosystems. A proper estimation of their population size is necessary, not only for their ecological values but also for commercial purposes. Most conventional techniques for estimating fish population are visual sampling techniques, the environmental DNA (eDNA) technique, minnow traps, the removal method of population estimation, and echo integration techniques, all of which are sometimes complex and costly, require human interaction, and can be harmful for marine species. In order to overcome these limitations, in this paper, a passive acoustic fishery monitoring technique is proposed as an alternative. The method is based on a statistical signal processing technique called “cross-correlation” and different types of sounds—namely, chirps, grunts, growls, clicks, and so forth—produced by fish and mammals. Our goal was not only to propose an efficient technique for fish population estimation but also to measure its performance for different fish sounds by using numerical simulations. From the analyses of simulated results, we found that the chirp sound-generating species produced better results than the other two types of sound-generating species—the grunt- and growl-generating species.

Assessment of the effect of changes in oil properties on measurement accuracy when using MVTM type turbine flow converters

2021 ◽  
pp. 178-182
Author(s):  
Александр Николаевич Теплых ◽  
Петр Сергеевич Гуляев
Keyword(s):  
Conversion Coefficient ◽  
Statistical Processing ◽  
Oil Viscosity ◽  
Flow Meters ◽  
Accuracy Of Measurements ◽  
Measurement Results ◽  
Processing Of Measurement Results ◽  
Experimental Researches ◽  
Calibration Interval ◽  
New Algorithms

Одной из основных погрешностей турбинных расходомеров является изменение коэффициента преобразования, который зависит от множества факторов. Авторами проведены экспериментальные исследования с целью установления влияния вязкости и температуры нефти на изменение коэффициента преобразования турбинных преобразователей расхода (ТПР) типа MVTM. В рамках работы выполнен анализ составляющих погрешности, рассмотрен вопрос статистической обработки результатов измерений методами теории вероятности и математической статистики. По результатам исследований с использованием трех расходомеров установлено изменение коэффициента преобразования в диапазоне от 0,2 до 0,3 %. Подтверждено, что изменение температуры и вязкости нефти оказывает существенное влияние на точность измерений, проводимых с помощью ТПР типа MVTM. Результаты работы могут быть применены с целью совершенствования методов измерения массы нефти при учетных операциях с использованием СИКН в части создания новых алгоритмов коррекции величины коэффициента преобразования для стабилизации метрологических характеристик ТПР в межповерочном интервале и, как следствие, минимизации финансовых и временных затрат на проведение внеочередных поверок. One of the main errors of turbine flow meters is the change in the conversion coefficient, which depends on many factors. The authors carried out experimental researches in order to establish the influence of oil viscosity and temperature on the change in the conversion coefficient of MVTM type turbine flow converters (TFC). Within the framework of the research, the analysis of the components of the error was carried out, the issue of statistical processing of measurement results by methods of probability theory and mathematical statistics was considered. According to the results of researches using three flow meters, a change in the conversion coefficient in the range from 0.2 to 0.3 % was established. It is confirmed that changes in oil temperature and viscosity have a significant impact on the accuracy of measurements carried out with the MVTM type TFC. The results of the work can be applied to improve the methods of measuring the mass of oil during metering operations with the use of CQCS in terms of creating new algorithms for the correction of the conversion coefficient value to stabilize the metrological characteristics of TFC in the calibration interval and, consequently, minimizing the financial and time costs of conducting unscheduled verifications.

scholarly journals Experimental research on vibrational digging-up of sugar beet

2018 ◽  
Vol 5 (1) ◽  
pp. 30-41
Author(s):  
V. Adamchuk ◽  
V. Bulgakov ◽  
I. Holovach ◽  
Ye. Ignatiev
Keyword(s):  
Sugar Beet ◽  
Technological Process ◽  
Experimental Research ◽  
Statistical Processing ◽  
Technological Parameters ◽  
A Value ◽  
Crop Root ◽  
The Impact ◽  
Experimental Researches

The technological process of vibrational digging-up of sugar beet has spread in many sugar beet-sowing coun- tries. The experience of using this process demonstrated its advantages compared against other ways of dig- ging-up, but there have been scarce experimental researches of the vibrational digging-up of sugar beet from soil which makes this topic urgent for sugar beet production. Aim. The experimental determination of rational parameters and modes of the vibrational digging-up working tool to ensure the required quality of conducting the technological process of digging sugar beet from soil. Methods. The methods of planning a multifactor ex- periment, fi eld studies, statistical processing, regression analysis of the experimental data with building graphic curves were applied. Results. A new model of a tool for vibrational digging-up of sugar beet from soil has been elaborated. The accepted program and method were used to conduct experimental research on the impact of the main construction and technological parameters of the vibrational digging-up working tool of the beet harvester on the quality indices of performing the technological process of harvesting sugar beet. The energy parameters of new vibrational digging-up working tools were studied in fi eld conditions via registering the values of tenzometric sensors in different modes of the device and different parameters and working modes of the vibrational digging-up tools. Conclusions. It was established that there is a value of the vibration frequency and running depth in soil of the vibrational digging-up working tool for each value of the translational veloc- ity of the vibrational digging-up machine which corresponds to minimal losses and damage to crop roots. It was also found that the degree of crop root damage depends on the conditions of performing the technological process of vibrational digging-up (soil solidity and humidity), and the weight of damaged crop roots increases with the increase in solidity and the decrease in humidity of soil.

A New Image Processing Technique for STEM

1974 ◽  
Vol 32 ◽  
pp. 432-433
Author(s):  
Yasushi Kokubo ◽  
Hirotami Koike ◽  
Teruo Someya
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Scanning Electron Microscopy ◽  
Elastic Scattering ◽  
Field Emission ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Energy Analyzer ◽  
Scanning Microscope ◽  
Scanning Electron

One of the advantages of scanning electron microscopy is the capability for processing the image contrast, i.e., the image processing technique. Crewe et al were the first to apply this technique to a field emission scanning microscope and show images of individual atoms. They obtained a contrast which depended exclusively on the atomic numbers of specimen elements (Zcontrast), by displaying the images treated with the intensity ratio of elastically scattered to inelastically scattered electrons. The elastic scattering electrons were extracted by a solid detector and inelastic scattering electrons by an energy analyzer. We noted, however, that there is a possibility of the same contrast being obtained only by using an annular-type solid detector consisting of multiple concentric detector elements.

EM of human atherosclerosis: Aortic fatty streaks with transitional lesion features

1992 ◽  
Vol 50 (1) ◽  
pp. 622-623
Author(s):  
K. Florian Klemp ◽  
J.R. Guyton
Keyword(s):  
Foam Cell ◽  
Cell Formation ◽  
Processing Technique ◽  
Foam Cell Formation ◽  
Tissue Preparation ◽  
Electron Microscopic ◽  
Extracellular Lipid ◽  
Electron Microscopic Cytochemistry ◽  
Human Atherosclerosis ◽  
Clinically Significant

The earliest distinctive lesions in human atherosclerosis are fatty streaks (FS), characterized initially by lipid-laden foam cell formation. Fibrous plaques (FP), the clinically significant lesions, differ from FS in several respects. In addition to foam cells, the FP also exhibit fibromuscular proliferation and a necrotic core region rich in extracellular lipid. The possible transition of FS into mature FP has long been debated, however. A subset of FS described by Katz etal., was intermediate in lipid composition between ordinary FS and FP. We investigated this hypothesis by electron microscopic cytochemistry by employing a tissue processing technique previously described by our laboratory. Osmium-tannic acid-paraphenylenediamine (OTAP) tissue preparation enabled ultrastructural analysis of lipid deposits to discern features characteristic of mature fibrous plaques.

Characterization of microwave-sintered ceramic composites

1993 ◽  
Vol 51 ◽  
pp. 1136-1137
Author(s):  
X. Zhang ◽  
Y. Pan ◽  
T.T. Meek
Keyword(s):  
Matrix Material ◽  
Maximum Output Power ◽  
Ceramic Matrix Composite ◽  
Ceramic Composites ◽  
Processing Technique ◽  
Structure Characterization ◽  
Alumina Powder ◽  
Maximum Output ◽  
Sintered Ceramic

Industrial microwave heating technology has emerged as a new ceramic processing technique. The unique advantages of fast sintering, high density, and improved materials properties makes it superior in certain respects to other processing methods. This work presents the structure characterization of a microwave sintered ceramic matrix composite.Commercial α-alumina powder A-16 (Alcoa) is chosen as the matrix material, β-silicon carbide whiskers (Third Millennium Technologies, Inc.) are used as the reinforcing element. The green samples consisted of 90 vol% Al2O3 powder and 10 vol% ultrasonically-dispersed SiC whiskers. The powder mixture is blended together, and then uniaxially pressed into a cylindrical pellet under a pressure of 230 MPa, which yields a 52% green density. The sintering experiments are carried out using an industry microwave system (Gober, Model S6F) which generates microwave radiation at 2.45 GHz with a maximum output power of 6 kW. The composites are sintered at two different temperatures (1550°C and 1650°C) with various isothermal processing time intervals ranging from 10 to 20 min.

Nanostructure of semiconductor quantum dots in a borosilicate glass matrix by complementary use of HREM and AEM

1990 ◽  
Vol 48 (4) ◽  
pp. 728-729
Author(s):  
M.J. Kim ◽  
L.C. Liu ◽  
S.H. Risbud ◽  
R.W. Carpenter
Keyword(s):  
Quantum Dots ◽  
Borosilicate Glass ◽  
Glass Matrix ◽  
Optical Switching ◽  
Response Times ◽  
Fast Response ◽  
Processing Technique ◽  
Internal Stresses ◽  
Electron Hole ◽  
Spatial Dimensions

When the size of a semiconductor is reduced by an appropriate materials processing technique to a dimension less than about twice the radius of an exciton in the bulk crystal, the band like structure of the semiconductor gives way to discrete molecular orbital electronic states. Clusters of semiconductors in a size regime lower than 2R {where R is the exciton Bohr radius; e.g. 3 nm for CdS and 7.3 nm for CdTe) are called Quantum Dots (QD) because they confine optically excited electron- hole pairs (excitons) in all three spatial dimensions. Structures based on QD are of great interest because of fast response times and non-linearity in optical switching applications.In this paper we report the first HREM analysis of the size and structure of CdTe and CdS QD formed by precipitation from a modified borosilicate glass matrix. The glass melts were quenched by pouring on brass plates, and then annealed to relieve internal stresses. QD precipitate particles were formed during subsequent "striking" heat treatments above the glass crystallization temperature, which was determined by differential thermal analysis.

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