bluuebunny/crossref_metadata_2025 huggingface dataset:
The formation of a variation method for calculating the accuracy of metal cutting systems
Authors: Anikeeva O.V. , Ivakhnenko A.G.
Published: December 2019

The paper is devoted to the topical issue of the formation of a variation method for calculating the accuracy of metal cutting systems. The current state of the basic variation method for calculating the geometric accuracy of metal cutting machines is determined. A transition from considering the geometric accuracy of only the metal cutting machine to considering the accuracy of the metal cutting system is made, which includes the metal cutting tool. The proposed directions for the development of the method are recommended to be divided into groups according to the criterion of linearized and non-linear formulation when building accuracy balances. The solution of the problem posed in the paper serves as a methodological basis for work on normalization and compensation of geometrical errors of machine tools, including the creation of the foundations of standards for the accuracy of metal-cutting machines and tools. This work is useful for scientists engaged in the study of the geometric accuracy of processing on metal-cutting machines, as well as the normalization and compensation of the geometric errors of machines.
Experimental and numerical determination of the bearing capacity of the honeycomb panel with potted inserts when loading the panel in its plane
Authors: Perov S N , Glushkov S V , Stepanets D V
Published: December 2019

A typical three-layer honeycomb panel of a spacecraft (SC) is considered. For connection to the power frame of the spacecraft, as well as for rigging works, embedded elements (inserts) are installed in the panel. The results of experimental and numerical determination of the bearing capacity of the panel in the places of installation of potted inserts under the action of the load in its plane are presented in the article.
The nature of the metal-ligand chemical bond and the electronic structure of Be, Mg, and Zn acetylacetonates and hetero- and β-substituted analogs
Authors: Komissarov A , Shcheka O , Korochentsev V , Vovna V
Published: December 2019

The effect of valence molecular orbitals on the nature of the chemical bond of the p-metal ion with chelate ligands in Be(acac)2, Mg(acac)2 and zinc Zn(acac)2 was studied by theoretical methods. The effect of the substitution of atoms and functional groups in the ligands on the chemical bond was estimated. For beryllium, the bond is almost completely covalent with an insignificant ion component: the Coulomb potentials for complexes with beryllium are 1.37 and 1.08 eV for acetylacetonate and hexafluoroacetylacetonate, respectively. For Mg and Zn β-diketonates with a metal-oxygen bond, the calculations showed the essentially ionic nature of binding: about 8 eV for magnesium compounds and 12.3 and 11.3 eV for zinc. However, the O→S substitution significantly reduces the metal-ligand binding iconicity: to 2.8 and 0.9 eV for the thio- and dithio-substitution, respectively. The covalent bond of a metal with ligands is due to the overlapping of only some MOs with s- and p-orbitals of the metal. The covalence of the M–O bond in acetylacetonates decreases in the series Be→Mg→Zn due to an increase in the ionic radius of the metal, leading to two consequences.
Comparative evaluation of the saving of binder WITH fine ground slag
Authors: Ochkurov V. I. , Vilenskii M. Yu.
Published: December 2019

The use of ground granulated blast furnace slag is one of significant reserves to enhance the cost and technical properties of cement composites. slag corresponding to the portland cement fineness is often used. ultra-fine slags from industrial by-products with high specific surface area can be used with grinding technology development. two types of ultra-fine ground granulated blast furnace slag were studied in portland cement-slag compositions. the results of reduction of total binder amount per 1 kg of plasticizing admixture were obtained and discussed. reduction of binder amount was explained by water-reducing effects of plasticizing admixture in portland cement-slag compositions depending on type, quantity and fineness of slag.
The role of chloride, oxygen and aluminum on corrosion resistance of coiled-pipes in tubular furnaces of oil refinery
Authors: Issa Bashar , Bazhin Vladimir Yu. , Telyakov Nail M. , Telyakov Alexey N.
Published: December 2019

In this article has studied the negative roles of chlorides, dissolved oxygen and aluminum, which are existed directly in the oil or indirectly in the associated water on the corrosion resistance of the coiled-pipes of the tubular furnace inside KINEF refinery (Russia). In this paper, we studied the coiled-pipes of the ELOU-AVT-6 installation, which are subjected to severe destruction, and as a result, they are prematurely failed due to the negative effects of the studied impurities, which led to decrease their service life and the quality of oil products.
Using fuzzy binary relations to characterize total power-load curve
Authors: Malafeev A.V.
Published: December 2019

The paper proposes an approach to load forecasting on the shop floor level of power distribution, as well as to forecasting the loads of process-sharing subdivisions for the dispatching of industrial pow-er supply. The approach implies mathematical representation of process linkages inside a production fa-cility as fuzzy relations. Fuzzy relations are described quantitatively by the incidence matrices, which are decomposed on multiple levels depending on the desired accuracy. It is proposed to find the coor-dinates of an ordered resulting curve, from which a daily curve can be derived on the known-form ba-sis. The approach can be used by the parameter and production teams of the Chief Power Engineer’s office of an industrial enterprise to make day-ahead curves as well as standard long-term daily curve.
Optimization algorithm of thermal power plants repair conditions
Authors: Varganova A.V.
Published: December 2019

The paper presents an algorithm for optimizing the conditions of industrial thermal power plants in terms of repairs to their boiler units and turbine generators, which allows to determine the optimal composition of equipment removed for repair, taking into account the fuel used and the season. The algorithm is based on the dynamic programming method, which allows to set models of turbogenerators and boiler units in tabular form, which, when forming the equivalent characteristics of generators or boilers, allows simultaneous determination of the optimal condition of all equipment for a given electrical and / or thermal load of the power plant. The optimality criterion is the minimum of the total cost of the fresh steam needed to generate heat and power. The optimization algorithm and equipment models are specially adapted to the conditions of industrial power plants.
Methodology of synthesis of algorithms for optimal control of adaptive power supply systems with wind power plants
Authors: Averyanov V K , Sidorenko G I , Tolmachev V N , Shapovalo A A
Published: December 2019

In Russia, relatively new is the development of the use of alternative and renewable energy sources. With scientifically based schemes and volumes of using alternative and renewable energy sources in combination with sources of traditional energy, energy and environmental safety, as well as reliability of power supply systems will increase. That’s why, technologies for using renewable energy sources are becoming the most important innovative direction for improving energy. Power supply systems with wind energy converter of autonomous objects belong to the class of functionally-adaptive systems, the operation of which is ensured by using adaptive optimal algorithms for automatic control and information processing.
Application of algorithms with a predictive model in solving the problem of regulating the rotational speed of the wind turbine of autonomous wind energy converters
Authors: Averyanov V K , Sidorenko G I , Tolmachev V N , Shapovalo A A
Published: December 2019

The effective use of wind energy converters in the composition of the energy supply systems of autonomous objects largely depends on the type of algorithms used for optimal control of automatic control systems. As you know, the universal properties have optimal control algorithms with predictive models.
Application of the coefficient of influence in the calculation of the relative error of gas flow meters
Authors: Popova M A , Ostapenko M S , Tveryakov A M
Published: December 2019

This article assesses the relative error in the operating conditions of gas flow meters and concludes on the applicability of the method of finding the relative error in the operating conditions of the gas flow meter using the coefficient of influence.
Actualization of the ensuring the repeatability quality problem of a car generator set in conditions of large-volume production
Authors: Kozlovsky V , Panyukov D , Ermakov V , Kolesov S , Kovaleva T
Published: December 2019

The causes of technological errors are quite numerous and varied, and they can be classified according to various criteria, for example, by the type of technological operations (errors in the machining operation of parts, winding and laying the windings into stator’s slots, etc.). The program performs an automated calculation of the characteristics of the generator when the input dimensional parameters of the core change within the limits of the tolerance field for each of them set by the technical specifications (TS). The algorithm of the program is based on the method of calculating a three-phase synchronous generator with a cranked rotor. To assess this effect, a system of interconnected computer programs and mathematical models has been built, with which it is possible to determine the weight of the influence of technological deviations in the manufacture of the generator on its performance and the characteristics of the electrical system as a whole. Reducing the variation of the generator reliability indicators can be achieved by phased assessment and timely adjustment of the quality level of design, production and ensuring their connection with the quality management system.
Improvement of competitive edge of precast reinforced concrete by increasing the reliability level and quality control
Authors: Belentsov Yu.A. , Smirnova O.M. , Kazanskaya L.F.
Published: December 2019

Improvement of the competitive edge of precast reinforced concrete is necessary to achieve due to the high quality and level of reliability. Previously, it can be concluded that there is significant potential to increase the level of reliability of precast structures by improving the quality of concrete and control. The advantages of precast concrete were considered in the paper. Changes of requirements of modern standards to the quality indicators of concrete strength including coefficient of variation of concrete strength properties were analysed. Assessment of the influence of the stability of precast reinforced concrete structures production due to such quality indicators as the coefficient of variation of the concrete strength and the accuracy of the cross section of precast elements was performed. The estimation of the variation coefficient of concrete strength from 9 to 13% in accordance with the changes in the modern regulatory documents was carried out in the paper. The results of the calculations show that the decrease of the reliability level takes place up to 30%.
Methodology for assessing the performance of the integrated management system
Authors: Velmakina Yu.V. , Vasiliev V.A. , Chernogorskiy S.A.
Published: December 2019

The paper deals with the formation of an integrated management system. The dynamic model of the quality of industrial production is developed and analyzed. The method for evaluating the effectiveness of the integrated management system is proposed. It includes activities to form criteria for assessing the effectiveness of the IMS, the definition and evaluation of indicators of each criterion, the assignment of weight coefficients criteria, direct calculation of the effectiveness of the integrated management system and determine the level of effectiveness of the system with further decision-making on the management of the integrated management system.
Choosing a quality management method
Authors: Sabirova S. , Vasiliev V.A. , Chernogorskiy S.A.
Published: December 2019

Product quality management in a modern enterprise is carried out using a set of methods. A large number of methods allow controlling product quality not only after a product is manufactured, but also during the entire production process, which is the most valuable in conditions of limited resources. The equipment is an integral part of the processes, and how well it works also depends not only on the quality of the products, but also the company’s ability to deliver the goods at exactly the time that is required (Just in time), and exactly in the amount that is required (KANBAN system). Since today the current issue for organizations is the optimization of equipment operation, the information management system of prevention of equipment failures is developed and substantiated in the article.
Improving the process of setting-up the extrusion line based on a systematic approach
Authors: Russkih I V
Published: December 2019

The article is devoted to the description of the application of a systems approach with the aim of improving the process of setting-up the equipment of cable manufacturing, namely, the extrusion line. First, a risk-based approach was used to identify the bottlenecks of the setting-up process using the FMEA methodology. Secondly, the most critical operations of the setting-up process were considered in terms of measurement authenticity. In this context, the analysis of the stability of the measuring process, an analysis of the bias linearity and an analysis of repeatability and reproducibility were carried out. Using the measurement system analysis, it was managed to reveal four main factors influencing the variation of the measuring process and recommendations were made to improve each of them. Corrective actions have been developed, after the implementation of which the level of general repeatability and reproducibility of the measurement process has passed into the category of acceptable. Thus, applying the principles of a systematic approach and using the tools recommended by IATF 16949 “Measurement system analysis” and “Potential failure mode and effects analysis”, we managed to achieve a new level of quality of the process setting-up an cable manufacturing, reduce the risk level of the process and minimize costs.
University risk assessment and management system
Authors: Kozlova Alsu , Snegurenko Alexander
Published: December 2019

Educational organizations in modern society are full participants in economic activity, they also face various “threats” that affect the quality of their work. The consequences of these threats can be of different levels: as insignificant as well as before the devastating scale that can lead institutions to the partial or complete failure of the educational system. These risks can be located both inside and outside the organization. It is very important to realize that managing risks is possible only when they are known, otherwise it is simply not feasible. To be competitive in the developing area of education it is necessary to identify threats timely, to assess them directly and adopt any management decisions. It is a necessary measure to reduce risk. Such systematic risk management will allow higher education institutions to provide high quality education on their academic programs.
Assessment of the reliability of the locomotive based on statistical methods of quality management
Authors: Kazantseva N K , Kharlamov E P , Tkachuk G A , Kazantseva T V
Published: December 2019

The lack of reliability of the diesel locomotive operation leads to a decrease in the technical and economic efficiency of using the locomotive service of the enterprise. During the experiment which aimed at assessing the reliability of repair and maintenance of a diesel locomotive in one of the railway divisions of OJSC “Russian Railways”, it was found that the failures may be distributed by types of equipment, based on the failures for 12 months of 2017. Statistical quality management methods were used to identify the most problematic types of locomotive equipment and specific causes of failures.
Improvement of the consumers’ satisfaction research technology in the digital environment
Authors: Bozhuk S.G. , Maslova T.D. , Pletneva N.A. , Evdokimov K.V.
Published: December 2019

The article is devoted to the problem of satisfaction estimate, based on the technology of content-analysis of the consumer feedback in the digital environment. Consumers are becoming an increasingly powerful competitive force. They generate content by themselves. The feedback is an important source of information about consumers’ opinion. The consumers’ impact in the digital environment is manifest, primarily, in the consumption expectation forming. The authors propose a methodic of the satisfaction evaluation research, which is based on the systematic analysis and synthesis of individual methods and theories of consumer behavior, competitive analysis, and marketing research. Evaluation of customer satisfaction involves considering the object as a set of attributes for each of which is determined by the assessment of the embodiment, the assessment of importance, and then - the assessment of private utility. The final value of satisfaction is defined as the sum of benefits.
Quality management of automated information systems in IT projects
Authors: Novikova T B , Davletkireeva L Z
Published: December 2019

Quality and reliability of systems development and their further realisation, competent application of standards and software products are for IT-specialist standards and software products are for an IT-specialist to be an important factor in the successful implementation of a management solution. The article considers, on the example of use of quality standards of systems and use of methods and means of Microsoft Project software, the implementation of the study on the example of company engaged in the extraction and transportation of natural gas, in which, today, there is a large fleet of automobile and special equipment and departmental gas stations. Within the article the realisation of only one research task is considered: development of data processing algorithm at branches. The project successfully passed all the necessary tests, after which an act of acceptance of integrated systems into operation was drawn up.
Using artificial neural networks when integrating the requirements of standards for management systems in QMS
Authors: Vasiliev V.A. , Velmakina Yu.V. , Mayborodin A. B.
Published: December 2019

The article is devoted to the features of the formation and implementation of integrated management systems, as well as a description of the experimental study of the applicability of machine learning methods in the process of integrating standards for management systems.
The introduction of information technology in business processes as a method of quality improvement
Authors: Ptitsyna V.S. , Kulikova M.S. , Vasiliev V.A. , Chernogorskiy S.A.
Published: December 2019

Currently, there are a large number of approaches that allow developing a business, structuring business processes, maintaining and improving competitiveness, quality of goods and services, achieve a high level of efficiency and effectiveness of the enterprise. For example, such approaches as process benchmarking, FAST technique, which is deciphered as a technique for rapid solution analysis, process engineering, process reengineering, process redesign, contribute to process optimization. However, there are still companies that do not provide complete management of the organization’s business processes. Later, that can lead to certain problems. Therefore, today the current issue for organizations is the optimization of business processes. Such a process has a number of advantages not only for the internal management of the organization, but also for the external environment.
DEA-methodology for criterial evaluation of configurations of spacecraft for earth remote sensing
Authors: Kremeneckaya M , Abramov G
Published: December 2019

The modern pace of life is inexorably increasing, which requires the creation of more and more advanced devices in a short time. One of the high-tech industries that provide socio-cultural needs is aerospace. Modern spacecraft are complex systems for the design of which requires a large amount of resources. Existing automated design systems are not able to provide design support at the pre-competitive (external) design stage. The purpose of the system is to create a decision-making support tool for designing complex systems of automated spacecraft for earth remote sensing. The use of the information system will create conditions for increasing the competitiveness of the manufacturer and will bring the design of aerospace equipment to a higher quality level.
Quality management in optimizing software product profile
Authors: Moskalev A. K. , Lugovaya K. S. , Kharitonova M. Y.
Published: December 2019

The article investigates the quality of a software product sold by “Svyazcom Ltd.”, a developer in the field of mobile communications and Internet, and created at various times by several programmers. It is shown that the application of the computer analysis permits to verify 86 indicators relevant to the quality parameters in the shell CppDepend, which meets the requirements of the assigned task most adequately. The analysis resulted in an optimized product profile. Proposals are presented for updating the quality management mechanisms in an innovative IT company taking into account the obtained values of quality parameters.
Research of oil-based drilling fluids to improve the quality of wells completion
Authors: Nutskova M.V. , Kupavykh K.S. , Sidorov D.A. , Lundaev V.A.
Published: December 2019

The aim of the work is to increase the well completion efficiency when using oil-based drilling fluids. In this study, the effect of the aqueous phase content on the change in the rheological parameters of the solutions and the effect of the type of asphalt on the structural-rheological and filtration parameters of the oil-based solution was conducted. Studies have shown the effectiveness of various types of asphalt in OBM systems, the obtained dependencies on the effect of the Oil-water ratio can be used in production to select the optimal ratio for the selection of specific properties of solutions.
Research of technological properties of cement slurries based on cements with expanding additives, portland and magnesia cement
Authors: Zimina D.A. , Nutskova M.V.
Published: December 2019

The boring log in the Eastern Siberia regions is characterized by the presence of frozen rocks, which causes a number of specific drilling problems. In such conditions, magnesia materials characterized by high expanding capacity are widely used for cementing wells. These materials improve well cementing quality by increasing the areas of complete contact at the rock-cement and cement-casing boundaries. For their effective use, it is important to evaluate the cementing parameters in comparison with the traditionally used Portland cement-based plugging materials. The high quality of the magnesia cement compositions in comparison with Portland cement was justified based on the data obtained from laboratory analysis.
Fuzzy modelling for tasks of management of the agricultural-industrial complex
Authors: Parfenova V.E. , Bulgakova G.G. , Amagaeva Yu.V. , Evdokimov K.V.
Published: December 2019

The problem of modeling and accounting for uncertainty in modern tasks of management is relevant. The effectiveness of the decisions depends significantly on the methods for describing the uncertainty in the problem. The greatest development in agrarian science received optimization and econometric models. How-ever, these models are based on quantitative determined initial information and accounting for uncertainty as randomness, which is described by probabilistic and statistical methods. Meanwhile, many modern decision-making tasks in planning and managing agricultural production are characterized by the presence of uncertain factors, as well as the availability of high-quality, inaccurate or in-complete information. To account and describe such uncertainty, an alternative approach to the probabilistic approach is needed. Fuzzy set theory is one of the most effective mathematical tools aimed at formalizing and processing uncertain information. The econometrics section related to using fuzzy set theory in regression analysis is developing methods of fuzzy regression modeling. The possibilities of using fuzzy regression modeling tools for analyzing management processes of agricultural production are discussed in this article.
Enhancing of Operational Reliability of Catenary and Electric Rolling Stock Wire Connections
Authors: Samokhvalov V N , Samokhvalova Zh V
Published: December 2019

The article deals with technological possibilities of operation reliability enhancement of high-current electrical connections while assembling unattended assembly joints under the pressure of pulsed magnetic field. The results of numerical modeling and experimental research of the catenary assembly process for the monometallic, bimetallic and composite multistranded wires between themselves and between them and terminals including those resulting vias made of aluminum and copper. The results of heat and electric tests of resulted connections are presented. It is ascertained that mechanical breaking strength of connections obtained under the pressure of pulsed magnetic field reaches 98…100% of intact wire strength. The factors of electrical contact defectiveness per resistance and per overtemp with rated current while making magnetic-impulse assembly of a wire and a coupling are lower than limit values, which are established for connections of feed wires, connectors and connecting clamps, which are obtained by pressing.
Development of uncertainty estimation procedure for measurement of nonlinear distortions
Authors: Belaya M , Kravtsova S
Published: December 2019

The article is devoted to the question of expediency of development of uncertainty estimation procedure for measurement of nonlinear distortions. The article deals with the sequence of uncertainty estimation in the measurement of nonlinear distortions. Using the reference calibration tool, the installation of the measuring sample K2C-57, calibration was carried out and the results of experimental studies were obtained, in assessing the uncertainty of measuring the harmonic distortion.
Development of the process map “research and development” for agricultural organizations
Authors: Aytasova A. , Selezneva Zh. , Belinskaia I. , Evdokimov K.
Published: December 2019

The quality management system is developing rapidly and dynamically in organizations of agriculture. The management of agricultural enterprises realizing the role of a leader in quality work is aimed at continuous improvement in all aspects of activity. The management of agricultural enterprises, realizing the role of a leader in quality work, is aimed at continuous improvement in all aspects of activity. The QMS in food production is implemented based on international standards such as ISO 22000, ISO 9001, where successive processes are described, which also include the principles of HACCP. This standard combines risk analysis and critical control points. Based on all these consistent measures, enterprises are striving to improve both the quality of the products and the work of the company as a whole. This is a necessary measure, it is obligatory in today’s time, because thanks to it, not only the product quality, but also the competitiveness of the production in the market increases. As a result, the enterprise opens an export opportunity. Without the introduction of a quality management system, the company cannot move on. This article discusses the QMS documentation, which allows controlling the processes and fruitfully developing the organizations of agriculture. Developing of the research engineering and development work process map for agricultural organizations. The input and output data of the process are determined, as well as the performance and risk indicators for the process. To improve the process management system, thresholds for process performance indicators are defined. The risks of the activities of the processes, to minimize the risks and prevent them in the future. The method of determining the effectiveness of the process is implemented. Indicators must be met in full size, without fail, of the number of non-compliances detected by the customer leads to a deterioration in the performance of the process by a percentage.
Research of stress and deformation of the foundation slab of the building taking into account anisotropic soil properties
Authors: Tumakov S.A. , G.N. Golub’
Published: December 2019

A numerical study of the influence of the anisotropic properties of soils on the stress-strain state of the foundation slab of an apartment building is carried out in the paper. A transversely isotropic base with the assumption of obeying the laws of a continuous linearly deformable anisotropic medium is accepted as a model of a soil base. The analysis of deformations, stresses and the necessary reinforcement in the sections of the foundation slab is performed. It is concluded that it is necessary to take into account the anisotropic properties of soils when calculating the building-structure system.
The effect of structuring composite building materials
Authors: Gotovtsev V M , Ignat’yev A A
Published: December 2019

A mechanism for structuring the dispersion-filled composite materials by the example asphalt concrete is considered in this paper. The effect of an abrupt increase in the strength and water resistance of the material is conditioned the manifestation of intermolecular interaction forces, is shown, which occurs during the formation of binder films between dispersed aggregate particles with a thickness comparable to the radius of action of intermolecular attraction forces. It was established that the structuring of asphalt concrete is manifested when the thickness of the liquid interlayers between the particles of the mineral powder is about 10-7 m, which allows to attribute the effect to the category of nano effects. The technology of industrial production of structured material based on pelletizing is proposed. The test results of the new material are presented. The possibility of using the developed technology for the disposal of industrial waste is shown.
Thermal modification of high moisture round logs in the environment of saturated water vapor with simultaneous predrying
Authors: Shaikhutdinova A R , Safin R R , Mukhametzyanov S R
Published: December 2019

The review of researches in the field of heat treatment of wood in Russia and abroad is carried out. The energy saving technology of thermal modification of high moisture round logs in the environment of saturated water vapor with simultaneous predrying is developed. The description of design of installation for realization of the offered technology is presented. The tests for determination of physical and chemical changes in wood during thermal modification were run. The results of tests and the regime parameters of conducting the process of thermal modification in the environment of water vapor for the purpose of receiving wood with the improved final characteristics are presented.
Influence of development conditions on qualitative indicators of Fungus Chaga
Authors: Razumov E , Safin R , Mukhametzyanov S R , Hučko Boris , Martin Pavlik , Gomba Gordon Karikoga , Bazant Vaclav
Published: December 2019

The paper gives description of the growth conditions on the output of valuable components from the fungus chaga. The samples of chaga represent two different regions of Eurasia – Western Siberia and the Czech Republic. The results of the research proved that the yield of melanin in water extracts from the chaga grown in Western Siberia was 1.7% higher than that of the Czech analogue. Consequently, the authors concluded that the harsher conditions of growth, which cause a slow growth of the fungus, lead to a greater accumulation of useful substances.
Development of laboratory techniques for assessment of operating properties of intumescent fireproofing coatings
Authors: Virolainen I , Martynov A , Ustinov A , Andreev A
Published: December 2019

adhesion of a charred layer to the surface of constructions and materials is one of the main components of fire protective efficiency of intumescent charring compositions, especially for metal surfaces. The paper overviews literature sources concerning the investigation of adhesive-cohesive properties of charred layers. It is shown that there are no easily performable methods for assessment of these properties. The laboratory device based on the «back strike» method has been developed. Adhesive-cohesive properties of charred layers modified with carbon additives were assessed using «back strike» method and pushing method. It is shown that these methods provide equal results.
Development of led-curable intumescent polymer coatings for fire protection of building constructions
Authors: Tomakhova A , Zybina O , Suprun V , Babkin O
Published: December 2019

The influence of reactive monomer on the properties of fire-protective intumescent composition and the final UV-curable coating was investigated; it was established that compositions based on isobornyl acrylate, mixture of hydroxyethyl methacrylate with dipropylene glycol, and cyclohexyl methacrylate form charred layers with sufficient fire-protective and mechanical properties.
Optimization of costs for labor protection of the enterprise
Authors: Malaian Karpush , Myasnikov V , Balueva A
Published: December 2019

All The authors propose a justification for the distribution of the budget of labor protection (LP) of the enterprise on organizational-technical measures aimed at improving working conditions and safety and on social activities related to staff training and prevention of workers health. The accumulation of professional risk is considered, and the efficiency of costs for LP is estimated by reducing the rate of its accumulation, the change in the distribution of which can serve as the basis for flexible management of labor protection of the enterprise in order to reduce the level of professional risk. The increase in the effect of the cost of LP, determined by the criterion of reducing the rate of accumulation of professional risk, is very relevant in the development of LP management in the enterprise.
Fire technical properties of intumescent and ablative fire resistant glass
Authors: Gravit M , Klimin N , Dmitriev I , Karimova A , Fedotova E
Published: December 2019

Conventional glass materials are weak spots in building fires, and fire codes requires installing fire-resistant glass in specified places. Apart from assessing fire resistance of glass panels by standard tests, there are no universal standards in fire-resistant glass specifications. In standard fire resistance tests, the most relevant performance criteria of fire-resistant glass are integrity, insulation, and radiation. The chemical compositions of the glass products, which depend on the manufacturing method and the required fire resistance standards, are not listed in glass specifications. This article provides an attempt to use calculation method for calculation fire resistance of some types of insulated fire-resistant glass, and describe some specific defects of alkali-silicate gel filled glass. It is shown that recently developed ablative fire resistant glass has some advantage.
The automated system of models of management of information resources of higher education institution
Authors: Avdeeva M , Leonova N , Gomazov F , Strelcova E
Published: December 2019

The special importance is gained by questions of stability of the Russian economy. Strengthening of this stability in the conditions of information revolution was resulted in need of transition from “material” to the “intellectual” economy which is based on knowledge (knowledge based economy). In this regard a problem of formation of competences of the sphere of the higher education receives a priority by preparation of the engineering and scientific shots creating the main part of profit. The article deals with the quality of service in the libraries of the university. We propose the automated system of models of management of information resource, consisting of three complexes, allowing to simulate the process of care, foresee the results of management decisions taken and choose the best of them. The complex of economic-mathematical models of quality management of service is presented in a natation of UML. Proposed economic and mathematical models for assessing the quality of decisions. The process of calculating the ratio of the qualification level of staff and the corresponding service time is shown.
Evaluation of the probability of correct positioning of the beacon and its motion parameters in passive search and rescue systems
Authors: Yukhno S , Petrov Yu , Yakovlev V , Tanklevskiy L
Published: December 2019

In this article, the approach to evaluate the probability of estimating the range of the beacon with a given accuracy is proposed. To determine the range to the beacon, a set of Kalman filters is applied to the beacon bearing measurements according to the given hypotheses about its motion parameters. The calculation of the probability of the correct choice of a hypothesis is presented. The hypothesis with the minimum sum of squared residuals is considered without prediction errors, its expectation and standard deviation, respectively, are. The time, required to determine the range with the probability 0.9..0.95 is calculated according to the proposed method agrees with the results obtained by statistical analysis, performed over multiple data sets. The results of the simulation of the “frequency” graph are shown.
Methods for assessing safe seniority in high noise conditions
Authors: Salkutsan V , Russkova I , Faustov S
Published: December 2019

A method for estimating the maximum allowable length of service in high noise conditions based on the calculation of the allowable working dose when working in working conditions with exceeding hygienic standards, which is based on the “equal energy” rule applicable to any factor of the each working environment is presented. A method of calculating the dose of the permissible noise level during the entire seniority LCT is proposed, on the assumption of threshold permissible values of the sound level (equivalent sound level), which allows implementing an occupational safety management strategy, both through organizational measures (transfer to areas with acceptable noise levels) and the development of measures to improve working conditions and safety. The dose principle of hygienic rationing allows us to estimate the actual load on the employee’s sensory systems and the required number of days of rest or work with reduced noise levels. To solve this problem, in the presented methodology, analytical methods that are proposed, allows to count the number of days of rest (or work with a reduced dose of noise) during a shift, month or year depending on the value of the equivalent noise level LA and the duration of its impact.
Effect of temperature and residence time on the characteristics of torrefied food
Authors: Abdul Rahman R N U , Abdul Rasid R , Ismail M
Published: December 2019

Malaysia generated food waste (FW) is approximately 15 000 tons every day and expected to increase every year. Currently, Malaysia is applying the landfilling method to dispose all of the MSW which cause potential threat towards the environment and society. FW may be converted into more valuable products through reutilizing as a renewable energy source through torrefaction. The objective of this study is to investigate the effect of torrefaction temperature and residence time towards the characteristics of torrefied FW. The torrefaction process was carried out in a fixed bed reactor with continuous flow of nitrogen, at various torrefaction temperature (260 to 320 °C) and residence time (15 to 60 minutes). The torrefied FW was evaluated in terms of its mass yield, thermal behaviour and the produced functional groups through the Fourier transform infrared spectroscopy (FTIR). It can be observed that the higher the torrefaction temperature and residence time reduces the mass yield. Meanwhile, the FTIR spectra for raw and torrefied FW at different residence time was executed the functional group of C=C, C=O, C-O and C-H were present in sample. From this study, it is established that there were significant effects of both parameters towards the characteristic of FW.
Optimization of process parameters for bioethanol production from oil palm frond juice by Saccharomyces cerevisiae using response surface methodology as a tool
Authors: Zani S H M , Asri F M , Azmi N S , Yussof H W , Zahari M A K M
Published: December 2019

The aim of this research was to investigate the effect of temperature, medium initial pH and rotation rate on the production of bioethanol from OPF juice without nutrient and nitrogen source supplementation using Saccharomyces cerevisiae Kyokai No. 7 (ATCC 26622). A five-level-three-factor central composite design (CCD) was employed in this study and the central point of each process variable was chosen based on the best condition obtained from the one-factor-at-time (OFAT) method. The parameters ranges were set as follows; medium initial pH (5-9), temperature (27.5-37.5°C) and rotation rate (80-120 rpm). Bioethanol and residual sugars concentration were determine using High Performance Liquid Chromatography (HPLC). The optimum conditions for bioethanol production from OPF juice were achieved at medium initial pH (6.62), rotation rate (96.51 rpm) and temperature (33.03°C). Based on the validation experiment, the optimum bioethanol yield was 0.50 ±0.02 g/g sugars and this value was in close agreement with the model prediction where the difference was only 4.17%. Under the optimal conditions, the bioethanol yield obtained was 47.06% higher compared with non-optimized condition. The promising yield obtained in this study suggests that OPF juice can be used as a renewable and complete fermentation feedstock for bioethanol production.
Co-gasification of coal and empty fruit bunch in an entrained flow gasifier: A process simulation study
Authors: Deraman M R , Abdul Rasid R , Othman M R , Suli L N M
Published: December 2019

Co-gasification of coal and biomass is a proven method to improve gasification performance and a platform towards being independent of fossil fuel in power generation. Thus, this research was conducted to assess the feasibility of coal and EFB as fuels in co-gasification using Aspen HYSYS. A sequential model of an EFG was developed to predict the syngas composition and the optimum operating condition of the gasifier. The process was modelled with a set of five reactors to simulate various reaction zones of EFG in accordance with its hydrodynamics. The model considers devolatilization, char and volatile combustion, char gasification and water-gas shift reactions. The model prediction has exhibited excellent agreement with the experimental results. Three parameters of BR, Top and S/F were considered to account for their impacts on syngas composition in the process. The CE, CGE, PE and HHV were adopted as the indicators of process performance. The optimal values of BR, Top and S/F were 50%, 950°C and 0.75, respectively. While the value of CE reached above 90% and the maximum value of CGE, PE and HHV was obtained. This finding should be helpful in designing, operating, optimizing and controlling any co-gasification process especially in the entrained flow system.
Assessment of heat pumping technology in oleochemical fatty acid fractionation
Authors: Sidek N M , Othman M R
Published: December 2019

Similar to petroleum industry, major energy consumption in oleochemical plants is also dominated by separation process in order to obtain purified oleochemical cuts. Combination of the distillation column with heat pumping system has emerged as one of the most popular techniques in heat integration. Although heat pumping technology has been proven to be effective in petroleum separation, the research on this technology in oleochemical separation has not yet been discovered. Hence, it would be appealing to investigate the feasibility of integrating heat pump technology with distillation units in hopes of reducing energy usage in the separation of oleochemical products. In this study, two configurations of heat pumping system, namely direct vapor recompression (VRC) and bottom flashing heat pump (BFHP) are simulated in Aspen Plus particularly for fractionation of palm kernel oil (PKO) fatty acid. Proper selection of thermodynamic package is discussed in detail. Only three major components of PKO-based fatty acid are involved in the simulation in order to arrive at simple simulation and easy convergence. Simulation results indicates that both configurations of heat pump can be feasibly integrated with the distillation column. However, to satisfy the heating and cooling requirement, supply of makeup utility is necessary.
Adaptive PLS inferential soft sensor for continuous online estimation of NOx emission in industrial water-tube boiler
Authors: Hasnen S H , Zabiri H , Prakash K K , Mat T T
Published: December 2019

In common industrial application, the use of a linear and static PLS soft sensor for online prediction and monitoring of industrial boiler is often preferred due to its simple and intuitive framework. However, process dynamics and time-variant factors can negatively affect the accuracy and reliability of PLS soft sensor over its long-term application in process industries. In this paper, development of adaptive soft sensor based on dynamic PLS method has been applied to an industrial water-tube boiler for continuous online prediction of Nitric Oxides emission. In the case study, it is found that the adaptive PLS soft sensor which includes lagged measurements of NOx emission in the model input can significantly improve the prediction accuracy and reliability by 72.7% relative to the performance of linear and static PLS soft sensor when tested on online dataset containing gradual and abrupt changes in the process operating conditions.
Temperature control of vacuum dividing wall column – case study on oleochemical fatty acid fractionation
Authors: Alias A , Othman M R
Published: December 2019

Analysis of oleochemical compositions in distillation column often have large process delays. Inferential control is commonly used by means of stage temperature as the measured variable which provide more responsive in composition control. This work aims to evaluate the performance of temperature control in vacuum dividing wall column (VDWC) for fatty acid oleochemical fractionation. Product purity at 99% used as inferred parameter to determine the temperature. Sensitivity analysis was used to determine the relationship between stage and temperature difference for changes in the manipulated variables. The most sensitive tray was selected and implemented to a Distillate- Side Stream- Boilup (DSV) control configuration in Aspen Dynamics following the work by Othman (2019b). Controller adopted with PI and PID settings using Ziegler-Nichols (ZN) and Internal Model Control (IMC) tuning calculation method. Both methods were compared based on the settling time and overshoot. The best setting was then fine-tuned before tested to set point tracking without any disturbances. From the sensitive analysis, temperature at stage 6, 29 and 34 were selected used as controlled variable which inferred distillate, middle and bottom product purity at 99% respectively. PID controller setting based on ZN method provide the best setup with fastest settling time and smallest overshoot and provide good performance for set point tracking.