Determination of error of sector location of subterrene stabilizing section based on coordinate control data

Abstract Results of the study of actual accuracy of the stabilizing section shell of the prototype subterrene are presented. The problem of experimental verification of the assumptions made in modeling is formulated. The research described in the article was carried out on the basis of experimental data obtained by coordinate control of the shell of the prototype subterrene. Data analysis was carried out by mathematical modeling of the surface of the shell of the stabilizing section as a whole and the surfaces of each individual sector. The obtained mathematical models are based on the approximation of sets of points obtained in the process of coordinate control by cylindrical surfaces. The article shows that at least a significant part of the deviations of the geometric shape of the section shell (from 30.3 to 52.3%) is explained by errors in the location of the sectors and errors in their radii. On the basis of the performed modeling, absolute values of the corresponding errors and actual values of the dimensions and deviations were determined. Studies confirmed the possibility of ensuring the specified accuracy of the shell surface when implementing the assembly technology used in a pilot production. At the same time, the proximity of actual deviations to maximum permissible values can lead to problems in ensuring the stable quality of subterrene case products in mass production. Correlation analysis of coordinate control data and statistical analysis of the series of residuals of developed models were carried out. Correlation analysis confirmed the dependence of deviations of experimental points on their cylindrical coordinates, which confirms the significance of the error in the location of the sectors in deviations from the geometric accuracy of the shell.

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Determination of Environmental Factors for the Implementation of the Exploitability Index in Industrial Aggregate Mining Using Multi-Criteria Analysis

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi10040196 ◽

2021 ◽

Vol 10 (4) ◽

pp. 196

Author(s):

Julio Manuel de Luis-Ruiz ◽

Benito Ramiro Salas-Menocal ◽

Gema Fernández-Maroto ◽

Rubén Pérez-Álvarez ◽

Raúl Pereda-García

Keyword(s):

Environmental Factors ◽

Environmental Factor ◽

Human Life ◽

Accurate Estimation ◽

Analytic Hierarchy ◽

Main Components ◽

Hierarchy Process ◽

Made In

The quality of human life is linked to the exploitation of mining resources. The Exploitability Index (EI) assesses the actual possibilities to enable a mine according to several factors. The environment is one of the most constraining ones, but its analysis is made in a shallow way. This research is focused on its determination, according to a new preliminary methodology that sets the main components of the environmental impact related to the development of an exploitation of industrial minerals and its weighting according to the Analytic Hierarchy Process (AHP). It is applied to the case of the ophitic outcrops in Cantabria (Spain). Twelve components are proposed and weighted with the AHP and an algorithm that allows for assigning a normalized value for the environmental factor to each deposit. Geographic Information Systems (GISs) are applied, allowing us to map a large number of components of the environmental factors. This provides a much more accurate estimation of the environmental factor, with respect to reality, and improves the traditional methodology in a substantial way. It can be established as a methodology for mining spaces planning, but it is suitable for other contexts, and it raises developing the environmental analysis before selecting the outcrop to be exploited.

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Determination of the smoothing ability of the vibration mixer on the basis of the correlation analysis

Proceedings of the Voronezh State University of Engineering Technologies ◽

10.20914/2310-1202-2018-4-30-34 ◽

2019 ◽

Vol 80 (4) ◽

pp. 30-34

Author(s):

D. M. Borodulin ◽

A. B. Shushpannikov ◽

T. V. Zorina ◽

E. A. Shushpannikov ◽

V. N. Ivanets

Keyword(s):

Correlation Analysis ◽

Material Balance ◽

Working Hours ◽

Bulk Materials ◽

Continuous Action ◽

Key Indicators ◽

Relationship Of ◽

Ratio Of Components

Now the increasing popularity is received by food semi-finished products from the bulk materials. With increase in volume of their production it is expedient to mix powdery materials in the mixers of continuous action. For the set working hours of the mixers of continuous action the movement of material in the device is considered to be casual stationary processes between which there is relationship of cause and effect. Key indicators for her assessment is the correlation coefficient, population mean and dispersion. Communication between entering and going out of the device signals is established by means of the equations of material balance, describing expenses of streams of bulk stochastic stationary functions X (t). Further, finding probabilistic characteristics of the entering and leaving signals, it is possible to judge "quality" of operation of the mixer or to select the required topology of streams in the hardware environment by comparison of the relations of their dispersions or mean square deviations. In this work the scheme of the movement of material streams in the mixer developed by us realizing a method of "consecutive dilution" is considered. By means of the system of the equations of the material balance displaying process of the movement of material in the mixers of continuous action of vibration type influence of recirculation on the smoothing properties of the device is considered. Values of size of the smoothing ability of S from recirculation coefficient ? and quantities of rounds of n are given. It is revealed that increase in the smoothing ability leads to increase of quantity of rounds, and respectively and dimensions of the mixers of continuous action of vibration type, therefore, it is expedient to use the mixer with quantity of rounds equal 6 and coefficient of recirculation equal 0.7 as at the same time the smoothing ability equal is enough 1753 for receiving qualitative ready mix at a ratio of components 1:50. By means of the correlation analysis it is possible to predict uniformity of a material stream at the device exit at the known values of the time spent in him of material, coefficients of recirculation and dispersion of an entrance signal.

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STANDARDISATION IN ENGINEERING SURVEYS

Geodesy and Cartography ◽

10.3846/13921541.2006.9636686 ◽

2012 ◽

Vol 32 (1) ◽

pp. Ia-Ic

Author(s):

Erol Yavuz ◽

Nihat Ersoy

Keyword(s):

Production Process ◽

Survey Methods ◽

Legal Regulations ◽

Cultural Relations ◽

Goods And Services ◽

The Subject ◽

Will Force ◽

Made In

Buying, selling and changing goods and services easily in today’s world, where economic, social and cultural relations are very complicated, are related to standards that determine the qualities of them. Although, there are standards for every kind of goods and services produced in the European Community (that we still try to be a member of it), any detailed study on this subject has not been done. Unfortunately, conformity packages, which come help us almost in every subject, will force us to work on this subject imperatively. Since the engineering surveys are also based on technological service and its production, getting more quality in a production process and the quality of the personnel (surveying engineers, surveying technicians etc), who works in production process, depend on standardisation of the methods and the equipment used for survey. The subject of the qualification and the quality of personnel, who work in surveying sector, determination of standards related to survey methods and instruments has not been taken into consideration in detail. Only some legal regulations have been developed until now. Quality problem in the production of goods and services must not change from country to country. This subject is very important and cannot be solved by legal regulations made in different countries. Free circulation of goods and services is possible if they are standardised globally.

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The Influence of Sampling Frequency on the Results of Motion Analysis Performed by High-Speed Digital Image Correlation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.816.397 ◽

2015 ◽

Vol 816 ◽

pp. 397-403 ◽

Cited By ~ 1

Author(s):

Martin Hagara ◽

Róbert Huňady

Keyword(s):

Digital Image Correlation ◽

Correlation Analysis ◽

Experimental Determination ◽

Digital Image ◽

High Speed ◽

Sampling Frequency ◽

Image Correlation ◽

Correlation System

The paper describes an experimental determination of kinematic quantities using high-speed digital image correlation system. It deals with the analysis of minimal sampling frequency needed for correctly performed high-speed correlation analysis. The authors also describe the influence of cameras sampling frequency on the quality of the obtained results. Mentioned analysis was performed using a rotational object. For the purposes of the results comparison the data obtained from correlation system in a form of displacements in three mutually perpendicular directions were processed in Matlab and in the paper are depicted in a form of graphical visualizations.

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Teaching Evaluation Algorithm Based on Grey Relational Analysis

Complexity ◽

10.1155/2021/5596518 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Xiaoying Zhang ◽

Xiuying Yang ◽

Jing Yang

Keyword(s):

Correlation Analysis ◽

Undergraduate Education ◽

Reference Data ◽

Influence Factor ◽

Data Matrix ◽

Data Sequence ◽

Control Data ◽

Grey Correlation ◽

Grey Correlation Analysis

Grey correlation analysis uses grey correlations to describe the strength, magnitude, and order of relationships among factors. The data sequence of the drmined data is used as a reference data string, and the data sequence matrix of each influence factor is used as a control data matrix to calculate the correlation between the data sequence and the reference of each factor in the control data matrix. The basic idea of quantitatively measuring the correlation between each factor and the object is to determine the similarity between the reference data sequence and the shape of multiple comparison data sequences and to determine whether the connection is strong. It reflects the degree of correlation between curves. In this paper, we examine the problem of evaluating the quality of undergraduate education by multiple indicators and establish a comprehensive evaluation model of the quality of undergraduate education in the 13 prefecture level cities by using the grey correlation analysis. The correlation coefficient of each index was obtained by the grey correlation analysis, the correlation number of each index was analyzed and ranked, and finally the improvement of the number of “advanced teachers” and the education of 13 prefectures were reduced as much as possible.

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Correlation Analysis of Compounds in Essential Oil of Amomum tsaoko Seed and Fruit Morphological Characteristics, Geographical Conditions, Locality of Growth

Agronomy ◽

10.3390/agronomy11040744 ◽

2021 ◽

Vol 11 (4) ◽

pp. 744

Author(s):

Guodong Li ◽

Qinwei Lu ◽

Jingjian Wang ◽

Qingyu Hu ◽

Pinghui Liu ◽

...

Keyword(s):

Essential Oil ◽

Correlation Analysis ◽

Morphological Characteristics ◽

Biomass Accumulation ◽

Perennial Herb ◽

Qualitative And Quantitative Analysis ◽

Morphological Variations ◽

The Difference

Amomum tsaoko is a perennial herb belonging to Zingiberaceae. Its dried ripe fruit is an important food additive, spice and materia medicai in Southeast Asia. For hundreds of years of cultivation, morphological variations have existed. The essential oil is one of the major active products of the A. tsaoko fruit and seed. In this study, we collected 12 populations in Yunnan province, and the correlation analysis of compounds was focused on the essential oil of A. tsaoko seed and its fruit morphological characteristics, geographical conditions, and locality of growth. The results showed that the difference in morphological characteristics between populations is greater than the difference within the population. High altitude areas are beneficial for biomass accumulation. Another interesting finding is that selecting specific functional or odor type materials could reference the morphologies of A. tsaoko fruit and seed. Furthermore, the qualitative and quantitative analysis of compounds in essential oil could be used to distinguish the producing area of the A. tsaoko fruit. These results are crucial in realizing the determination of botanical origin and evaluating the quality of A. tsaoko fruit. Meanwhile, it makes clear that various other studies on this plant deserve more attention.

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The quantitative comparison of experimental and simulated diffraction contrast images

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013688x ◽

1995 ◽

Vol 53 ◽

pp. 102-103

Author(s):

Stuart McKernan

Keyword(s):

Image Processing ◽

Personal Computer ◽

Close Agreement ◽

Quantitative Comparison ◽

Image Simulation ◽

Computing Power ◽

Diffraction Contrast ◽

Simulated Images ◽

Made In

For many years the concept of quantitative diffraction contrast experiments might have consisted of the determination of dislocation Burgers vectors using a g.b = 0 criterion from several different 2-beam images. Since the advent of the personal computer revolution, the available computing power for performing image-processing and image-simulation calculations is enormous and ubiquitous. Several programs now exist to perform simulations of diffraction contrast images using various approximations. The most common approximations are the use of only 2-beams or a single systematic row to calculate the image contrast, or calculating the image using a column approximation. The increasing amount of literature showing comparisons of experimental and simulated images shows that it is possible to obtain very close agreement between the two images; although the choice of parameters used, and the assumptions made, in performing the calculation must be properly dealt with. The simulation of the images of defects in materials has, in many cases, therefore become a tractable problem.

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Tingkat Pemahaman Kompetensi Guru Pada Mahasiswa Pendidikan Geografi Sebagai Calon Guru Geografi

JURNAL SERAMBI ILMU ◽

10.32672/si.v21i1.1880 ◽

2020 ◽

Vol 21 (1) ◽

pp. 102-117

Author(s):

Novia Zalmita ◽

Muhajirah Muhajirah ◽

Abdul Wahab Abdi

Keyword(s):

Prospective Teachers ◽

Prospective Teacher ◽

Quantitative Description ◽

Population Data ◽

Geography Education ◽

Teacher Competence ◽

Education Department ◽

Long Time

One that influences human resource indicators is education. The teacher is a profession as a job of academic specialization in a relatively long time in college. Understanding related to teacher competence is very important to have by a prospective teacher because it can affect the quality of performance as a professional teacher. The teacher's competence is known as pedagogic, professional, social and personality competencies. The issue in this study is how the competency of the teacher of the Department of Geography Education FKIP Unsyiah as a prospective teacher of geography? The purpose of this study was to determine the competence of teachers in the Department of Geography Education FKIP Unsyiah as prospective geography teachers. Quantitative description approach is used in this study to find answers to the issue. The population in this study were students of the Department of Geography Education FKIP Unsyiah class of 2015 and 2016 who had been declared to have passed the Micro Teaching and Magang Kependidikan 3 course totaling 50 people. Because the population is small and can be reached, the determination of the sample using total sampling techniques so that the sample in this study is the whole population. Data collection is done by distributing test questions to respondents. The data was analyzed using the descriptive statistics percentage formula. The results of the study indicate that the level of teacher competence of Geography Education Department students as prospective teachers is in the moderate category, namely as many as 22 respondents (44%). A total of 12 respondents (24%) were in the high category, 15 respondents (30%) were in the low category and 1 respondent (2%) were in the very low category.

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