Study on Classification of Rock Pile

2011 ◽  
Vol 52-54 ◽  
pp. 777-781
Author(s):  
Ming Kui Huang
Keyword(s):  
Mechanical Properties ◽  
Classification Method ◽  
Engineering Properties ◽  
Engineering Construction ◽  
Rock Pile ◽  
Factors Influencing ◽  
Main Factors

Rock pile is a typical kind of adverse engineering geologic phenomenon in mountainous engineering construction. In this paper, according to the main factors influencing the engineering properties of rock pile, the classification of the rock pile are studied. Based on the physico- mechanical properties of rock pile, the multi-hierarchy classification method is proposed. The suitability of the process is verified by classifying the typical rock pile on the Shui-ma(from Shuifu to Maliu Bay) expressway. The relevant results can provide reference to other classification study of rock pile.

Experimental Study on Mechanical Properties of Rock Pile

2010 ◽  
Vol 168-170 ◽  
pp. 303-306
Author(s):  
Ming Kui Huang ◽  
Xi Wu Yang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Yunnan Province ◽  
Influencing Factor ◽  
Engineering Properties ◽  
Coarse Particles ◽  
Particle Composition ◽  
Engineering Construction ◽  
Rock Pile ◽  
Main Factor

Rock pile is a typical kind of adverse engineering geologic phenomenon in mountainous engineering construction. In this paper, the Shui-ma(from Shuifu to Maliu Bay) expressway subgrade of rock pile in Yunnan Province is analyzed, and the mechanical properties of the rock pile are studied through indoor experiments. The results indicate that the main factor determining the engineering properties of rock pile is the particle composition, while the most influencing factor is the content of coarse particles. The relevant results can provide reference to engineering properties study of rock pile for other place.

scholarly journals МОДЕЛЮВАННЯ ПРОЦЕСУ ТЕРТЯ В ТЕКСТИЛЬНИХ МАТЕРІАЛАХ

2020 ◽  
Vol 144 (2) ◽  
pp. 45-53
Author(s):  
Н. П. Супрун ◽  
М. Л. Рябчиков ◽  
І. О. Іванов
Keyword(s):  
Mechanical Properties ◽  
Coefficient Of Friction ◽  
Textile Material ◽  
Structural Elements ◽  
Friction Process ◽  
Textile Materials ◽  
Factors Influencing ◽  
The Coefficient Of Friction ◽  
Properties Of Materials ◽  
Main Factors

Create a model for determining the coefficient of friction of textile materials to identify the main factors influencing the process of friction, taking into account the structural and mechanical properties of materials. Modeling of friction process in textile materials as a combination of adhesive and elastic phenomena. Roughness of solid bodies and the main parameters of roughness, such as the height of micro-irregularities, their pitch, sharpening, etc. described in many standards and scientific papers. However, the modeling of the friction process in such systems is very complicated due to the irregularity of distribution of microroughness. The analysis of literature data showed that the surface roughness of textile materials is an important and effective factor in predicting the tactile properties of products for various purposes. Estimation of surface roughness is usually carried out using subjective and objective methods, and the latter can be contact and non-contact. The paper develops a model for determining the coefficient of friction of textile materials to identify the main factors influencing the friction process, taking into account the structural and mechanical properties of materials. Friction force is presented as a combination of two main factors. The first is the elastic resistance to deformation, the second is the adhesive resistance to compression of the structural elements of the material. The main parameters influencing the coefficient of friction of textile fabrics - modulus of elasticity of structural elements, their geometrical parameters - surface density of textile material, linear density of structural elements are established. The obtained results allow to qualitatively predict the friction forces of a textile material with known parameters of its structural elements, as well as to normalize these parameters to create materials with specified friction indices. The obtained results make it possible to select the threads that form the textile material, according to the values of the modulus of elasticity, thickness, location density to ensure the minimum friction force.

scholarly journals TECHNOLOGIES, SYSTEMS, AND EQUIPMENT FOR WASTEWATER HEAT UTILIZATION (REVIEW)

2020 ◽  
Vol 42 (3) ◽  
pp. 39-46
Author(s):  
B.І. Basok ◽  
M.P. Novitska ◽  
S.M. Goncharuk
Keyword(s):  
Heat Recovery ◽  
Scientific Literature ◽  
Residential Buildings ◽  
Heat Extraction ◽  
Utilization Review ◽  
Heat Utilization ◽  
Factors Influencing ◽  
Main Factors ◽  
Political Economic

The paper analyzes research, technologies, and equipment related to wastewater heat utilization systems. The main factors influencing the development of the industry and the implementation of such systems are given. Such factors include: social, political, economic, technological, legal and environmental. The classification of technologies and equipment for wastewater heat utilization according to the place of heat extraction is given. Namely, low potential wastewater heat can be collected at the treatment plants, in sewer collectors leading to treatment plants and directly in houses. The paper describes the available research in the scientific literature on these three categories The global scientific community is working to create efficient wastewater heat recovery systems. The environmental situation requires greater use of wastewater recovery systems. An important issue is to increase awareness and education of the population, as this approach will increase the degree of implementation of wastewater heat utilization systems in residential buildings.

Analysis of Factors Influencing the Performance of Q460 Steel

2014 ◽  
Vol 599-601 ◽  
pp. 7-11
Author(s):  
Zhu Ling Yan
Keyword(s):  
Mechanical Properties ◽  
Engineering Application ◽  
Steel Structures ◽  
Building Structures ◽  
Practical Application ◽  
Widespread Application ◽  
Factors Influencing ◽  
Steel Building ◽  
Practical Engineering ◽  
Main Factors

With the development of technology, steel structures have been gaining increasingly widespread application, and the scope of research of steel types is also becoming increasingly broad. In addition to the four common steels used in construction, various mechanical properties and practical application of Q460 steel have also been studied at home and abroad at present. This paper introduces the research status of Q460 steel, describes its mechanical properties and the requirements for steels used in steel building structures, and analyzes the main factors influencing the properties of Q460 steel, providing some reference for practical engineering application of Q460 steel.

THE MAIN FACTORS INFLUENCING THE FUNCTIONING OF HOTEL-RESTAURANT COMPLEXES AND TOURISM IN UKRAINE

2021 ◽  
Author(s):  
Ruslan Skrynkovskyy ◽  
◽  
Sviatoslav Kniaz ◽  
Mariana Khmyz ◽  
Yuriy Tyrkalo ◽  
...  
Keyword(s):  
Economic Crisis ◽  
Methodological Approach ◽  
Tourism Industry ◽  
Species Classification ◽  
Travel Agents ◽  
Factors Influencing ◽  
Travel Agencies ◽  
Main Factors

The article presents the main factors influencing the functioning of hotel-restaurant complexes and tourism in Ukraine. It has been established that hotel and restaurant and tourist complexes are included in the structure of the subjects of tourist activity. It was found that in the period 2013– 2019 the volume of services provided by temporary accommodation and catering companies, travel agencies, travel operators, companies providing other services, in particular, booking and related activities, has an unstable dynamic. It was determined that the dynamics of the total number of inbound (foreign), outbound and domestic tourists who were served by tour operators and travel agents by type of tourism was unstable, since the main reason that negatively affected this trend was the economic crisis of 2013–2015 in Ukraine, caused primarily by the instability of the situation in the political sphere. It was determined that in the species classification of tourism, that is, the distribution of tourists who were served by tour operators and travel agents, the highest is the number of outbound tourists traveling outside Ukraine. It was found that the number of domestic tourists is significantly lower than the number of outbound tourists, since on average for 2011–2020 was 23,6 %, and the lowest was in 2019 – 9,4 %, due to the COVID–2019 pandemic, under the influence of which another economic crisis arose not only in Ukraine, but also in the world as a whole. It was found that the proportion of inbound (foreign) tourists in the period 2011–2020 decreased sharply – from 10,6 % in 2010 to 0,5 % in 2020, the reason for which is the decrease in the attractiveness of the tourism industry of Ukraine for foreign tourists. It is noted that the prospects for further research in this direction are the development of a methodological approach to assessing the quality of tourism and hotel and restaurant services.

An Analysis on Engineering Properties of Peaty Soil in Kunming Civil Engineering

2012 ◽  
Vol 568 ◽  
pp. 21-26
Author(s):  
Zai Xi Yu ◽  
Jing Cao ◽  
Hui Min Zhao
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Stress Path ◽  
Engineering Properties ◽  
Burial Depth ◽  
Factors Affecting ◽  
Engineering Construction ◽  
The Poor ◽  
Peaty Soil ◽  
Biological Field

The poor engineering properties of peaty soil are unfavourable for engineering construction. Based on field test datum, the mechanical properties of peaty soil in different buried depth have been analyzed. The result shows that the shear strength of shallowly buried peaty soil reduce gradually with the increase of burial depth, however, which increase gradually along with the depth for deep buried peaty soil. The factors affecting the meso-structure of soil, for example, stress state, the stress history, the stress path, the variation of groundwater, chemical field, biological field and physical field is discussed.

Analysis of Factors Influencing on Compaction Performance of Hot Asphalt Mixtures by Orthogonal Test

2012 ◽  
Vol 190-191 ◽  
pp. 423-426
Author(s):  
Lan Ouyang
Keyword(s):  
Mechanical Properties ◽  
Asphalt Pavement ◽  
Physical And Mechanical Properties ◽  
Orthogonal Test ◽  
Asphalt Mixtures ◽  
Molding Temperature ◽  
Factors Influencing ◽  
Main Factors ◽  
Orthogonal Tests ◽  
Compaction Performance

The compaction can directly affect the performance of asphalt pavement, while the mixing temperature, the molding temperature, the temperature of aggregates and the rolling times can all affect the compaction performance. The L9(34) orthogonal tests and indoor tests were used to analyze the influence of the main factors on the examination indicators. The results show that molding temperature have a significant effect on the physical and mechanical properties of SMA13 asphalt mixtures when the confidence level α is 0.10. Finally, quantitative analysis is performed to study the optimal compaction technology of molding temperature and rolling times.

Reproduction potential-based differentiation of Russian regions

2020 ◽  
Vol 18 (7) ◽  
pp. 1304-1319
Author(s):  
M.V. Moroshkina
Keyword(s):  
Spatial Development ◽  
Uneven Development ◽  
Regional Differentiation ◽  
Russian Regions ◽  
Policy Documents ◽  
Factors Influencing ◽  
Strategic Policy ◽  
Main Factors ◽  
Per Capita ◽  
Research Period

Subject. This article examines the issues related to changes in reproduction capacity and heterogeneity of the development of Russian regions. Objectives. The article aims to assess regional differentiation and investigate the main factors influencing the uneven development of the areas. Methods. For the study, we used the methods of comparative and correlation analyses. Results. The article identifies groups of leading and lagging Russian regions and assesses the possibility of convergence of Russian regions according to the analyzed indicators, such as GRP, GRP per capita, and the output of industry. Conclusions. The results obtained can be used when preparing strategic policy documents, spatial development programmes and concepts. The observed heterogeneity suggests that the regions maintain their positions throughout the research period.

Improving management as a way to increase labour productivity

Upravlenie ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 24-30
Author(s):  
A. O. Ivanov
Keyword(s):  
Productivity Growth ◽  
Labour Productivity ◽  
Production Costs ◽  
Managerial Practices ◽  
Industrial Enterprises ◽  
Labour Productivity Growth ◽  
Period 2 ◽  
Main Factors ◽  
The Moment

The article gives an overview, performs analysis and classification of successful managerial practices applied at Russian industrial enterprises in the framework of the national project “Labour productivity and employment support”. The paper emphasizes the main factors of labour productivity growth as follows: investment policy, growth of human capital, and efficient use of managerial capital of enterprise. In order to determine the need of enterprises to increase labour productivity, the author proposes four universal criteria that signal the existing inefficiency even before the loss of competitiveness: 1) the dynamics of labour productivity in the company is not positive during a given period; 2) the company is behind competitors by labour productivity indicator; 3) the company is behind competitors by labour productivity growth rates indicator for a certain period; 4) unit production costs rise. These criteria allow you to take into account the situation both within the enterprise and in comparison with other enterprises. Each criteria can be considered separately or in combination with the others, applied to enterprises of different industries, specialization, and scale. Criteria indicate the direction of development in which the company is experiencing difficulties at the moment, or may experience them in the future.

Plant communities on rock outcrops in the northwest part of the Black Sea Caucasian coast

2009 ◽  
pp. 3-14
Author(s):  
V. B. Golub ◽  
N. A. Grechushkina ◽  
A. N. Sorokin ◽  
L. F. Nikolaychuk
Keyword(s):  
Plant Communities ◽  
Black Sea ◽  
Soil Cover ◽  
Geographical Location ◽  
The Black Sea ◽  
Rock Outcrops ◽  
Exact Test ◽  
Main Factors ◽  
Phi Coefficient

The classification of petrophytic vegetation of coastal steeps was proposed for the Northwest Cauca­sian coast of the Black Sea using the Braun-Blanquet approach. The main factors that influence the deve­lopment of vegetation in question are abrasion and denudation sea coast processes. The coastal steeps in study area are formed by carbonate flysch. The plant communities occur on rocky slopes with poorly deve­loped soil cover, fine stone chips as well as rock crevices. Nine associations and four communities without syntaxonomic rank were documented in the table and described with respect to their phyto­socio­logical affinities, ecology, and geographical location. Diagnostic species of syntaxa were established using phi-coefficient calculations of fidelity and Fisher’s exact test. In addition, the results of relevé ordination were given using the algorithm of non-metric multi­dimensional scaling (NMS) that is embedded in PC-ORD 5.0 software package.

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