scholarly journals Modeling of mechanism of obtaining mesostructural coal matrix in pyrolysis processes.

2021 ◽  
Author(s):  
Valeriy Kotelnikov ◽  
Elena Ryazanova ◽  
Olesya Ershova
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Energy Balance ◽  
Coal Combustion ◽  
Raw Materials ◽  
Metallurgical Industry ◽  
Deep Processing ◽  
High Quality ◽  
Pyrolysis Processes

Abstract Reducing the role of coal in the energy balance of countries and the whole world sets the task of improving coal combustion technologies and creating new environmentally friendly processes for deep processing of coal. The production of high-quality raw materials for the metallurgical industry and other industries is a strategic task for the development of the country. In this study we try to use an Monte Carlo method to analyze and modeling of coke producing process in the device for continuous pyrolysis of organic materials in a thermally loaded layer.

scholarly journals RURAL IRONWORKING CRAFT IN THE MEDIEVAL RUSSIA PRODUCTION SYSTEM

2021 ◽  
pp. 369-383
Author(s):  
В. И. Завьялов ◽  
Н. Н. Терехова
Keyword(s):  
Multivariate Analysis ◽  
Production System ◽  
Raw Materials ◽  
Technological Innovations ◽  
High Quality ◽  
Production Culture

Получить полноценную характеристику производственной культуры Древней Руси невозможно без изучения роли сельского ремесла. Многофакторный анализ археометаллографических данных позволил сделать вывод о том, что сельское ремесленное производство представляло гораздо более сложное явление, чем виделось ранее. Древнерусское село не только служило поставщиком сырья в городские ремесленные центры и производило простую в технологическом отношении продукцию, но и воспринимало технологические инновации. Сельские мастера сами могли производить качественные кузнечные изделия и снабжали ими ближайшую округу. It is not possible to obtain full characteristics of the Medieval Russia production culture without examining the role of rural crafts. Multivariate analysis of archaeometallographic data made it possible to conclude that rural crafts were a much more sophisticated phenomenon than previously thought. A village in Medieval Russia not only supplied raw materials to craft centers and manufactured technologically simple products but also adopted technological innovations. Rural craftsmen were able to produce high-quality blacksmith products and supplied them to the nearby population.

Mineralogical applications of the analytical SEM in archaeology

1987 ◽  
Vol 51 (359) ◽  
pp. 21-31 ◽  
Author(s):  
I. C. Freestone ◽  
A. P. Middleton
Keyword(s):  
Elemental Analysis ◽  
Raw Materials ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
High Quality ◽  
Mineralogical Investigation ◽  
Modern Analytical ◽  
Quality Imaging

AbstractThe modern analytical SEM, which can provide high-quality imaging facilities together with quantitative elemental analysis using an energy-dispersive spectrometer, is finding wide application in the investigation of archaeological problems. Many of these investigations involve the study of silicate and carbonate-based artefacts which may be relatively unmodified from their original geological parent raw materials so that mineralogically based interpretations are often appropriate. In this paper we present a series of examples illustrating the role of the analytical SEM in the mineralogical investigation of archaeological problems, including the characterization and provenancing of geological raw materials, the elucidation of the processes used to transform those raw materials into useful objects and the recognition and characterization of changes which archaeological artefacts may have undergone during burial or during storage.

scholarly journals Application of the Monte-Carlo Method to the Description of the Dynamics of the Spread of Salvo Pollution Complicated by Adsorption

2021 ◽  
Author(s):  
Serghei Travin
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Specific Adsorption ◽  
Underlying Surface ◽  
High Quality ◽  
Kinetic Curves ◽  
The Monte Carlo Method

The possibilities of application of the Monte-Carlo method for simulating the consequences of pollutants emissions with specific adsorption on the underlying surface were considered. Effective methods of obtaining kinetic curves for the concentration of a pollutant for a selected square on the field and constructing contamination profiles for a specified time are analysed. The estimation of the necessary parameters of the model for obtaining high-quality kinetic curves was performed and recommendations for their optimization are given. Specific fronts for the spot propagation were obtained and visualised.

Probability and Sensitivity Analysis of Plate

2014 ◽  
Vol 617 ◽  
pp. 193-196 ◽  
Author(s):  
Katarina Tvrdá
Keyword(s):  
Sensitivity Analysis ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Flat Plate ◽  
Concrete Structures ◽  
Probability Analysis ◽  
Triangular Distribution ◽  
High Quality ◽  
Input Parameters ◽  
Concrete Solution

This paper deals with some problems of the ceiling plate, made of the Cobiax-system. Cobiax provides a system to produce voided, biaxial, flat plate slabs as a high-quality concrete solution for large spans and slim slabs. Plastic voids in the shape of spheres or flattened spheres are contained in steel cages and put into concrete structures to create longer spans and reduce vertical loads. The presented plate is made of cobiax balls with a diameter of 27 cm located outside the area of columns. Probability analysis of Monte-Carlo method in Ansys is presented. Input parameters are changing according to Gauss or triangular distribution.

scholarly journals Production Contracts and Food Quality: A Transaction Cost Analysis for the Italian Durum Wheat Sector

2021 ◽  
Vol 13 (5) ◽  
pp. 2921
Author(s):  
Angelo Frascarelli ◽  
Stefano Ciliberti ◽  
Gustavo Magalhães de Oliveira ◽  
Gabriele Chiodini ◽  
Gaetano Martino
Keyword(s):  
Cost Analysis ◽  
Durum Wheat ◽  
Raw Materials ◽  
Asset Specificity ◽  
Factor Analyses ◽  
High Quality ◽  
Contractual Arrangements ◽  
Production Contracts ◽  
Shed Light

Agribusiness firms requiring a consistent supply of high quality agricultural raw materials have increasingly adopted production contracts to coordinate their supply chains. The present work is aimed to shed light on the role played by sources of asset specificity and uncertainty related to quality strategies in the diffusion of contractual arrangements within the Italian durum wheat sector. To this purpose, factor analyses and probit regressions are estimated in data collected among durum wheat producers. The findings confirm that the role of asset specificity is negligible in presence of staple crops. Moreover, they reveal that experience, transparency and technological stability are all relevant aspects that reduce uncertainty and, in turn, trigger the adoption of production contracts as a governance solution for durum wheat.

scholarly journals Simulasi Monte Carlo dalam Prediksi Jumlah Penumpang Angkutan Massal Bus Rapid Transit Kota Padang

2020 ◽  
Author(s):  
Khaliq Alfikrizal ◽  
Sarjon Defit ◽  
Yuhandri Yunus
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Real Data ◽  
Bus Rapid Transit ◽  
Rapid Transit ◽  
High Quality ◽  
Simulation Data ◽  
The Monte Carlo Method ◽  
Average Accuracy ◽  
High Level

Bus Rapid Transit is a system of bus facilities, services and comfort which is used to increase speed and reliability and is integrated with a strong transit identity through high quality services. Trans Padang is a land transportation based on Bus Rapid Transit in Padang City which is managed by the Transportation Agency which started operating in January 2014 with a total bus fleet of 10 units on the Lubuk Buaya-Pasar Raya Padang route. Currently it has 2 corridors operating out of 6 corridors designed. This study aims to predict the number of Bus Rapid Transit passengers in Padang City and determine the level of accuracy of simulation data with real data using the Monte Carlo method. The data used to predict the number of passengers is data on the number of passengers from January 2017 to December 2019. From the simulations carried out, simulated accuracy is obtained for predicting the number of passengers with an average accuracy of above 80%. Based on a fairly high level of accuracy, the application of the Monte Carlo method to predict the number of Bus Rapid Transit passengers in Padang City is considered to be able to predict the number of passengers in the following year.

scholarly journals Upgrading of heavy crude oil in supercritical aqueous fluid in the presence of activated charcoal

2021 ◽  
pp. 8-15
Author(s):  
A. I. Lakhova ◽  
◽  
S. M. Petrov ◽  
N. E. Ignashev ◽  
G. G. Islamova ◽  
...  
Keyword(s):  
Crude Oil ◽  
Activated Charcoal ◽  
Raw Materials ◽  
Reaction Medium ◽  
Aqueous Fluid ◽  
Heavy Crude Oil ◽  
Deep Processing ◽  
High Quality ◽  
Environmentally Safe ◽  
Heavy Crude

The article presents the results of deep processing of heavy crude oil in supercritical aqueous fluid, which makes it possible to significantly reduce the content of sulfur and resinous asphaltene compounds in products, and to increase the yield of light fuel fractions. The possibility of reducing the temperature of upgrading of heavy crude oil due to the presence of active charcoal in the reaction medium is shown. The proposed technology provides environmentally safe and residue-free processing of heavy oil and further production of high-quality hydrocarbon raw materials enriched in low-boiling fractions. Keywords: upgrading; heavy crude oil; supercritical aqueous fluid; activated charcoal.

Towards effective regulation of the development of the Russian mineral resource complex: issues of industrial policy and corporate management

2021 ◽  
pp. 65-80
Author(s):  
Yu. B. Vinslav
Keyword(s):  
Mineral Resource ◽  
Industrial Policy ◽  
Raw Materials ◽  
Methodological Approach ◽  
Added Value ◽  
Corporate Management ◽  
High Quality ◽  
Environmental Friendliness ◽  
Key Factor

The article systematizes the main governance factors for ensuring the effective functioning of the mineral and raw materials complex (MRMC) of Russia and its rapid, sustainable and high-quality growth. The role of industrial policy as a key factor in the rational reproduction and diversification of the mineral resource complex is emphasized. Examples of innovative development of the complex in the aspects of increasing the output of high added value products and improving the environmental friendliness of production are given. Recommendations for improving the governance of exploration activities are given. A methodological approach to the governance of unified production and technological chains in the mineral resource complex is proposed. The author formulates the considerations concerning the activation of innovative activity of the complex companies based on the improvement of corporate management.

scholarly journals DEPOSITS OF BRONZE SMALL TWIGS IN MIDDLE ROS BASIN

2019 ◽  
Vol 31 (2) ◽  
pp. 514-517
Author(s):  
V. V. Romanuik
Keyword(s):  
Spectral Analysis ◽  
Raw Materials ◽  
Titanium Content ◽  
Total Weight ◽  
High Quality ◽  
Tin Bronze ◽  
Bronze Casting ◽  
Natural Impurity ◽  
Casting Production

In the article the noticeable role of bronzocasting production is considered on the settler monuments of scythian time in the Tarashchanskiy district of the Kyiv area. Among the numerous testimonies of bronze casting production and trade in metals the two most interesting items are bronze treasures, recently discovered in the villages of Lisovichi and Dibrovka in Kyiv region. Each contained about 300 bars with a length of 40.5 and 22 cm (Lisovichi), 41 cm (Dibrovka), total weight about 30 kg. We can assume a different purpose of bronze bars: blanks for specific products, raw materials for smelting, the equivalent of money. Spectral analysis of the products showed that they are made of high-quality tin bronze with a high admixture of iron (2.58 %, Lisovichi). Titanium content (4.39 %, Lisovichi) remains unclear (is it a natural impurity in raw materials?) According to the place of discovery (on settlements), treasures of bars can be dated to Scythian time (the end of 6th—5th century BC?), although more late dates are not excluded.

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