bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathematical modeling of the process of grinding grain materials
Authors: Mishkhozhev V Kh , Teshev A Sh , Kazdokhov Kh K , Kurmanova M K , Mishkhozhev Kan V , Mishkhozhev Kaz V
Published: November 2020

The problem of providing peasant (farmer) households with the means of production is currently very relevant, since the existing prototypes of equipment do not always satisfy both the necessary and sufficient conditions for its use. With small production volumes, it is rather difficult to ensure a high load factor and uniformity of high-performance equipment. High prices for energy resources in agricultural enterprises do not allow producers to reduce prices for their products, as a result, it negatively affects, first of all, consumers. Consequently, in the modern conditions of the functioning of peasant (farmer) farms, the development of new and improvement of existing means of mechanizing the production process, corresponding to the foundations and principles of resource conservation, comes to the fore. Among the means of mechanization for grinding grain materials, the most common are universal impact crushers with articulated hammers. They are able to grind various types of raw materials, are relatively simple in design and convenient in maintenance and operation. Their design allows easily changing wear parts (hammers, decks, grates). At the same time, modern designs have significant disadvantages such as the following ones: high metal consumption and energy consumption of installations, uneven grain size distribution with an increased content of dust particles, intensive wear of working bodies and the associated decrease in productivity and quality of material grinding.
Electrochemical behavior of 6xxx series aluminium alloys in electrolytes containing chloride ions
Authors: Dubova I V , Gilmanshina T R , Vasyunina N V , Sanacheva G S , Chupriy O V
Published: November 2020

The paper is devoted to the study of the behavior of aluminium alloy 6063 in solutions containing chloride ions. The corrosion rate was calculated by means of a gravimetric method, the dependence of the corrosion resistance on the concentration of electrolytes and the holding time was determined. The effect of corrosion on the ultimate strength of the alloy has been shown. The type of corrosion has been identified; the explanation has been given for the transition from pitting to intergranular corrosion due to the presence of intermetallics of iron and silicon Al3Fe and Mg2Si, which results in weakening strength. Recommendations for reducing corrosiveness have been given.
Reinforcement of cement mortar with alumina nanofibers
Authors: Dobrosmyslov S S , Peresypkin E V , Voronin A S , Fadeev Y V , Khartov S V
Published: November 2020

The article discusses the possibility of using alumina nanofibers to reinforcement cement mortar. Nanofiber is a twisted conglomerate, and its ultrasonic treatment in the water allows obtaining a stable dispersion. The research has been carried out on the effect of nanofibers on the viscosity of cement paste, as well as on the reinforcement of cement mortar. At concentrations less than 0,2%, there is no significant effect of nanofibers on the viscosity of the system. The studies were carried out on standard Portland cement at a water-cement ratio of 0.27. Reinforcement of cement mortar with aluminum oxide, with a concentration of 0 to 0.1%, does not give a significant change in the microstructure of the material. It was shown in the work that the use of nanofibers makes it possible to increase the strength of the system by 20% in compression and by 45% in bending.
Mechanical properties UHMWPE/alumina nanofibers nanocomposite
Authors: Kuular A A , Voronin A S , Markevich I A , Bermeshev T V , Simunin M M
Published: November 2020

We study the effect of a new dielectric filler – alumina nanofibers (ANF) on the mechanical properties of ultra-high molecular weight polyethelene (UHMWPE). It was shown that the combination of powder granules and alumina nanofibers in the process of solvent evaporation helps to distribute uniformly the powder particles over the surface. The effect of the process of mechanical activation on the mechanical properties of the UHMWPE/ANF nanocomposite was studied. Increasing the concentration of the ANF additive from 0.01 wt. % to 1 wt. % helps to uniformly increase the tensile strength and microhardness of the nanocomposites. It is shown that the addition of alumina nanofibers in an amount of 1 wt. % leads to a simultaneous increase in tensile strength by ∼42.5 % and microhardness by ∼71% in comparison with pure UHMWPE.
Simulation vertical sensing of the water environment hydrophysical fields
Authors: Savkova E O , Chengar O V , Shevchenko V I , Shumaieva O O
Published: November 2020

Classes of objects that form the information system structure for monitoring the water environment hydrophysical fields have been developed. Class descriptions include object parameters that affect the composition and operation of the system, and methods that define actions with class instances. Additional control classes are proposed for describing the interaction of objects and simulating the sensing process.
The influence of cryogenic treatment and subsequent annealing steps on the structural and phase state of 12Cr18Ni10Ti steel
Authors: Kozlova T A
Published: November 2020

The paper considers the effect of cryogenic treatment and subsequent annealing steps on structural, corrosion-resistant 12Cr18Ni10Ti steel. The microstructure of steel was studied and the reverse alpha-gamma transformation after cryogenic treatment and additional annealing was revealed. X-ray structural analysis the steel was carried out. As a result of dimpersed analysis in the structure of 12Cr18Ni10Ti steel large particle TiC, etching pits, high sulfur particle were found. Annealing led to the reverse alpha-gamma transformation. The formation of a grain recrystallized structure was found. An increase in the grain size after cryogenic treatment with a subsequent increase in the annealing temperature was recorded 12Cr18Ni10Ti steel.
Calibration of technological parameters of an electroadsorption apparatus with a fixed layer of adsorbent
Authors: Merentsov N A , Persidskiy A V , Topilin M V , Golovanchikov A B
Published: November 2020

This paper provides a program and algorithm for automated calibration of technological parameters of an electroadsorption apparatus with a fixed adsorbent layer. The basic physical principles that allow obtaining the necessary information about the ranges of regulation of the electric field parameters and the development of dynamics of filtration modes of the continuous gas phase flow through the adsorbent layer are described. The technological parameters obtained during calibration and their control ranges serve as the basis for implementing a program for controlling the operating modes of electroadsorption apparatuses during the current operation of technological equipment.
The research of thermoelastic deformation models with thin elliptic boundary contours plates and accounting uncertainty factors
Authors: Bolnokin V E , Storozhev V I , Hai Duong Minh , Mutin D I
Published: November 2020

Consider thin plates with external or internal boundary elliptical contours. It is necessary to take into account the scattering errors of the values of the initial physical, mechanical and geometric parameters based on the use of the heuristic principle of generalization. Known research methods for such systems based on the methodology of accounting for plate deformation under the influence of thermometric factors. Of particular interest is the assessment of the endogenous characteristics of the process using a hybrid technology for accounting for displaying the variability of inputs to these characteristics. Significant relationships of low-variant versions of the model are created for the base component, which is a homogeneous orthorhombic area of nonzero thickness and nonzero area in given coordinates. Axes passing through the middle of the element are defined. Half shafts define an elliptical contour. Stresses in the element are generated by the heat flux, which is symmetric and axial with respect to the coordinate system in the heat flux part.
Environmental problems of gasoline and diesel fuel use in Russia
Authors: Kovaleva M A , Ganzha V A , Tsygankova E V , Slashchinin D G , Matkerimov T I
Published: November 2020

The present study considers an environmental analysis of gasoline and diesel fuel use in Russia. Volume dynamics of atmospheric pollutant emission from stationary and mobile sources is presented. Chemical composition of vehicle exhaust gases is examined and toxicity of components is estimated as well as their adverse health effects in exposed people. The changes in the concentrations of detected substances in recent years are analyzed. Prospects for the use of NGV (natural gas vehicle) fuels are defined. Comparative characterization of toxic substances emissions into the environment when using natural gas instead of petroleum fuel is provided.
An embodiment of a compact circular directional coupler for maritime communications equipment
Authors: Hung L Q
Published: November 2020

The article is devoted to the design and configuration of a circular directional coupler with a small size for maritime communications equipment. In the course of the work, the model of the device and its characteristics were analyzed. It has been determined that a compact device has a significantly smaller area while having comparable characteristics. The process of miniaturization itself consisted in replacing traditional quarter-wave segments with their analogies implemented on a printed circuit board in the form of inductive and capacitive elements.
Control of a non-stationary dynamic system with estimating a strategy of human resources management by the integral indicators method
Authors: Masaev S N , Vingert V V , Musiyachenko E V , Salal Y K
Published: November 2020

A general idea research is a lack of articles to estimate system indicator of the effectiveness of the strategy of human resources management (HR) at an economic object (enterprise). We are use the method of integral indicators for a comprehensive assessment of the activities of an economic object (enterprise). The economic object is formalized as a non-stationary dynamic system. The system has a dimension of 1.2 million parameters. The parameters of the object under research (business processes) are compared with staff responsibilities. The sanctions mode is set by blocking staff responsibilities in the interval in each time period t. The integral indicator is calculated according to the standard mode (Strategy 1) of the economic object (enterprise) and without blocking the staff responsibilities. Also, the integral indicator is calculated according to the non-standard operating mode of the enterprise (Strategy 2) with the blocking of staff responsibilities. The difference between the integral indicator of Strategy 2 and Strategy 1 is an estimation of the impact of the imposed sanctions. The resource consumption for the restoration of the normal operation of an economic object after the imposed sanctions is give (61.63 million rubles). Example 2 introduces equipment sanctions from America for a new project. An analysis of the indicators of a new project is carried out with the search and use of analog equipment
Comparative capability analysis of laser multispectral methods for measuring oil slick thickness
Authors: Belov M L , Kopysova T I , Gorodnichev V A
Published: November 2020

The remote laser multispectral method capabilities to measure the thickness of the oil slicks on the sea surface in various spectral bands have been analysed. The best option (in terms of the band and the recovery accuracy of the oil film thickness on the water surface) is to use the eye-safe spectral band of about 2.1 μm. It is shown that a use of the discretely wavelength-tuneable laser for 5 wavelengths in spectral interval about 2.1 μm and the quasi-solution search method for mesurement data processing, enables us, with the mean square value of measurement noise 2 %, to recover the thickness of the oil slicks on the sea surface from ∼ units μm to ∼ 200 μm with an error of no more than 30%.
Grain crop defect fixing method based on digital image statistical parameterization
Authors: Kovalev Andrey , Pribylsky Alexey
Published: November 2020

The article examines the main stages in the development of a statistical method for localizing and classifying grain crop defects in conditions of low resource consumption of hardware and software of modern agricultural sorting systems. The developed methodology allows: to form a set of coefficients that make it possible to quantify the area under study; the use of the variation coefficient enables to unambiguously assess the homogeneity of the contents of the investigated area; the analysis of the obtained groups of variation coefficients provides for localization of the alleged defect against the general background of the contour, with its contents heterogeneity.
Decrease in average traffic speed and increase in harmful emissions of vehicles at unregulated pedestrian crossings in cities
Authors: Atabekov K K , Sarymsakov B A , Maksimovich K Yu , Voinash S A , Kamenchukov A V , Gamilia O N , Sokolova V A
Published: November 2020

The problem of environmental pollution is one of urgent problems of mankind. This problem especially applies to large cities of any state. Atmospheric air, which performs life-supporting, protective and other functions, is subject to the greatest change. Increased air pollution leads to a negative impact on public health. So, every year number of social movements and various events is growing, expressing great concern about the state of air in the city of Bishkek. Basically, organizational and technical measures are aimed at improving road safety by reducing speed. But along with a decrease in traffic speed, fuel consumption increases, which in turn leads to a proportional increase in exhaust gas emissions. Especially in places where artificial irregularities are established, intensive braking occurs, followed by acceleration of the vehicle. This article is devoted to assessing the impact of unregulated pedestrian crossings on average speed of traffic and emission of harmful substances by vehicles. Relationship between the average traffic speedat unregulated pedestrian crossings and the total delay of vehicles has been established. An increase in emissions from vehicles at unregulated pedestrian crossings is substantiated, which makes it possible to calculate the cumulative emissions from vehicles on the sections of the city’s road network more accurately. This article presents the results of experimental studies of the influence of artificial irregularities, stopping points and parking places on the traffic speed and emissions of exhaust gases into the atmosphere.
Risk assessment in the activities of testing laboratories of mechanical engineering products
Authors: Blyankinshtein I M , Makhova E G
Published: November 2020

A methodological approach to risk assessment in the testing laboratory of mechanical engineering products has been developed, based on the provisions of GOST R 58771-2019 “Risk management. Risk Assessment Technologies”. To identify risks, a list of hazards was created and structured using the Ishikawa method. For the analysis and comparative assessment of risks a “consequences / likelihood” matrix was created taking into account the social, legal, financial, reputational and professional consequences of risks.
Eco-friendly equipment of the Vyatka state agricultural academy
Authors: Simbirskikh E S
Published: November 2020

The inevitable tightening of requirements for preserving the planet’s climate and reducing the negative impact of energy technology emissions into the environment is already beginning to influence the choice of technologies in all areas of industrial and social activities. In this regard, there is an urgent need to find more reliable and cheaper technologies that can replace traditional technologies. The paper presents mock-up models of eco-friendly equipment for transport, national economy and agro-industrial complex developed at the Department of heat engines, cars and tractors of the Vyatka state agricultural academy.
Analysis of effect of carbon black on plugging mixtures
Authors: Nikolayev N I , Kovalchuk V S
Published: November 2020

This study is devoted to the study of grouting mixtures for cementing oil and gas, hydrogeological and exploration wells. In order to improve technical and operational parameters, a number of highly effective modifiers are used, including nanocarbon materials. The article provides the properties of carbon black obtained by processing tires, and also shows an analysis of its effect on the physical and mechanical properties of grouting mixtures made from ordinary Portland cement CEM-I. The research on receiving a high-strength grouting composition for well cementing is presented. The optimal content of carbon black and plasticizers in the binder has been estimated, which makes it possible to access the required technological properties of cement stone in comparison with a solution without additives. It has been determined that small doses of nanocarbon modifiers are needed to effectively affect the properties of the cement stone. The physical, mechanical and operational properties of the modified grouting mixture are considered.
Cluster analysis for modeling the cost of industrial land objects in Krasnoyarsk region
Authors: Panfilov I A , Alekseeva Y A , Shiryaeva A A , Karelin O I , Kustov D V
Published: November 2020

An assessment activity must have a legal justification. The regulatory documents are results of a land plot state assessment carried out in the Russia regions on a regular basis. In this research mathematical models for evaluating land plots in Krasnoyarsk region based on data from the state assessment of 2012 and 2017 were built. The models were supposed to formalize the mechanism for evaluating the state contractor when evaluating industrial land. Factor and cluster analysis methods were used. The factors were determined to a greater extent determining the change in the value of the objects of assessment. The data for the analysis was taken from open official sources. The simulation results showed unstable dependencies in the official results of the state contractor evaluation. Further analysis revealed errors in the official report.
Research of the impact of ultrasonic and thermal effects on oil to reduce its viscosity
Authors: Palaev A G , Shammazov I A , Dzhemilev E R
Published: November 2020

At the moment, reserves of low-viscosity oil fields are beginning to deplete, and therefore the need for the production of high-viscosity, heavy and bituminous oils is increasing. The difficulty lies in the fact that their transportation from production sites to consumption sites is difficult due to the high viscosity of oil. Currently, the thermal method is widely used to reduce the viscosity of high-viscosity oils. One of the promising and environmentally friendly methods of reducing oil viscosity is the method of using ultrasonic treatment. This paper will investigate the effectiveness of ultrasonic exposure versus thermal exposure to reduce oil viscosity.
Theoretical basis of selection of measurement measures in control of linear sizes
Authors: Leonov O A , Shkaruba N Zh
Published: November 2020

The important role of metrological support in machine-building production has been shown. It has been established that in connection with the introduction of quality systems and management systems for metrological support of measurements at machine-building enterprises and the need to assess the quality of measuring processes, it is necessary to develop methods for analyzing the effectiveness of the results of using one or another measuring instrument. The analysis of the existing methods of selection of measuring instruments for linear dimensions in the tolerance control of mechanical engineering products is carried out. It is proposed to solve the problem of economic optimization of measurement accuracy by taking into account both measurement costs and losses from measurement errors. An expression is obtained for calculating the theoretically optimal measurement error, which corresponds to the criterion of minimizing the amount of losses from the measurement error and the costs of the measuring process when organizing the control of a specific parameter by universal measuring instruments of linear dimensions.
Optimization of starch sulfation process with a deep eutectic solvent-mixture of sulfamic acid:urea
Authors: Kazachenko A S , Vasilyeva N Yu , Malyar Yu N , Kazachenko A S
Published: November 2020

The process of sulphation of potato starch with a deep eutectic solvent, a mixture of sulfamic acid: urea, was optimized. The influence of varying factors was established - the ratio of sulfamic acid: urea (SAA: U), the ratio of starch: sulfating complex (St: SC) and the duration of the process on the sulfur content (wt.%) in the obtained starch sulfate. The data of analysis of variance for the obtained mathematical models indicate good prognostic properties. The optimal conditions for starch sulfation, which provide water-soluble sulfated starch with a high (up to 11.2% wt.) sulfur content, have been established. The optimal conditions for the process of sulfation of potato starch are the ratio SAA: U 1: 2.0-1: 2.2, the ratio St: SC 1: 3.5-1: 4.0 and the duration of the process is 118-120 minutes.
Analysis of the time-frequency characteristics of seismic and electric fields over the Novomikhaylovskoye gas condensate field
Authors: Potylitsyn V S , Kudinov D S , Maykov O A
Published: November 2020

The article analyses the characteristics of seismic and electric fields over a gas condensate field. The horizontal electric component of the Earth’s electromagnetic field in the centre of the field has a pronounced frequency dependence and is localized in the frequency range up to 100 Hz. In the centre of the field, there is a fairly even electric component of the Earth’s electromagnetic field without sharp bursts and impulse noise, while from the edge of the field impulse dips of up to several seconds are observed. The high values of the seismic-electric coefficient at the Novomikhaylovskoye gas condensate field when it is calculated as the maximum of the cross-correlation function are due to the fact that the power of the recorded seismic field is more localized in the frequency spectrum up to 30 Hz and, as a consequence, when calculating the cross-correlation function, this makes the greatest contribution to its amplitude value.
On the possibility of predicting rock burst in mines by the seismic-electric method
Authors: Kudinov D S , Shaydurov G Y , Neverov A S , Agrovichenko D V
Published: November 2020

The article discusses a method for predicting a methane explosion in underground workings by observing simultaneously electrical and acoustic noises of the Earth on the surface of a mine field, highlighting their mutual correlation function. When used in the observation of acoustic noises by three-coordinate seismic receivers in two spaced along the Earth’s surface, an algorithm for determining the coordinates of the expected explosion site is described. The results of field tests of the method at the Minusinsk gas condensate field are presented.
Analysis of seismoelectric effects via tank experimental observations
Authors: Potylitsyn V S , Kudinov D S , Kokhankova E A , Shaydurov G Y
Published: November 2020

The purpose of the present research is to experimentally confirm the seismoelectric effects of the second type on the physical model, which is represented by a tank filled with sand (2.1 x 1.32 x 3.2 m). Analysis of the current state in the field of hydrocarbon search using seismoelectric effects was carried out. Physical modeling of microseismic and natural electromagnetic field was performed applying acoustic emitter and grounded electrodes at the tank edges; registration was carried out with the help of three axial seismic receivers manufactured by GS and grounded dipole using non-polarizing electrodes of VIRG design. The results show that the maximum of the cross-correlation function is highly noisy, and recording seismoelectric effects on physical models of such sizes using the existing element base is not possible, thus, it is necessary to either increase the sensitivity of the receiving equipment along with an increase in the size of physical models or increase the signal accumulation time from 20 minutes or more.
Nitrogen oxide formation with nonuniform fuel distribution in diesel engine
Authors: Chumakov V L , Devyanin S N , Bijaev A V
Published: November 2020

The high requirements for limiting the toxic components of exhaust gases of modern internal combustion engines require significant expenditures both for the improvement of existing engines and for the development and implementation of new types of engines. Some European organizations are raising the issue of limiting the use of diesel engines and even a possible cessation of their production in the next 5-10 years. This article reflects the results of studies on the formation of one of the most toxic components of exhaust gases - nitrogen oxides. The calculations were carried out according to the thermodynamic cycle model, which makes it possible to estimate the main characteristics of the operating cycle as the fuel-air charge burns out. Calculations are carried out with regards to a gas-diesel modification of an air-cooled engine with a dimension of 120 x 120 mm, which assumes the supply of the main gas-air charge through the inlet pipeline and a limited dose of diesel fuel injected into the cylinder to ignite the charge. The model shows the conditions for the burnout of the charge and the formation of nitrogen oxides in 10 equal in mass and successively burnout zones of the charge in the diesel cylinder. Calculations show that the formation of nitrogen oxides can be significantly reduced by 50 … 80% by adjusting the charge stratification scheme, that is, by changing the fuel concentration in the burnt-out portions, due to the mutual regulation of diesel and gas fuel supplies. The results of experimental verification of the calculations are presented below, which confirms the adequacy of the model. The effect in the total reduction of NOx emissions can be significantly improved by using partial charge throttling and using exhaust gas recirculation. The data obtained confirm the feasibility of further fine-tuning the working process of gas-diesel engine modifications and meeting the requirements of toxicity standards.
Analytical estimation of solution parameters for elliptic equations with variable coefficients in fluid dynamics
Authors: Lelekov T I , Lelekov E T
Published: November 2020

In this paper we consider multidimensional and two-dimensional elliptic partial differential equations of the second order with variable coefficients. They are often used in the oil and gas industry to calculate the inflow volume of liquids and gases from natural reservoirs to exciting structures. The analytical solution of that equations with variable values of the permeability coefficient is possible in rare cases, when the change in the formation permeability is expressed in the form of simple analytical dependencies over the area of fluid filtration. In this paper, we give estimated formulas for fluid inflow to structures under conditions of reservoir heterogeneity, which retain an analytical relationship with the permeability coefficient. The value of the proposed method lies in the ability to establish important qualitative regularities of an underground flow formation, based on simple formulas. The obtained expressions of the above theorems are consistent with the calculation formulas of underground fluid dynamics, and allows one to perform calculations of oil production in heterogeneous formations.
Influence of mass flow transfer on velocity profile formation
Authors: Ponikarov A
Published: November 2020

Heat and mass transfer processes underlie almost all processes in the chemical and petrochemical industry (rectification, absorption, drying, evaporation, etc.), and, as a rule, such processes take place in multicomponent systems. It should be noted that the accuracy of existing methods for calculating mass transfer processes does not exceed 85% (although it can reach 95-97% for well-studied problems). In general, separation processes are very energy-intensive, moreover, they often have a negative impact on the environment. In view of the above, it is advisable to in-depth study of the phenomena and processes occurring in the mass transfer equipment. One of the methods is numerical simulation in the ANSYS Fluent software package, which has proven to be a reliable tool for modeling mass transfer processes.
Ecodesign management modelling for petrochemicals manufacturing
Authors: Dyrdonova A N , Zinurova R I , Girfanova E Y , Andreeva E S
Published: November 2020

Creation of the necessary conditions for the sustainable development, design and manufacturing of competitive products, improvement of the environmental and industrial safety are the major tasks for the petrochemical manufacturers. Handling these tasks is impossible without applying the modern management systems that allow for establishment and implementation of the enterprise’s performance self-assessment approach in terms of quality assurance and control, compliance with the environmental legislation, and international standards of social responsibility and manufacturing greening. For making optimal decisions at the management level in regard to the petrochemical manufacturing greening, it is essential that a relevant efficiency parameters monitoring system is applied. In this context, the authors offer a mathematical model that demonstrates a method of improvement of the petrochemical manufacturers’ earning power through mastering the green technologies. The mathematical model parameters include the profit, resource productivity of produced petrochemicals, environmental R&D costs, as well as specific quantities of atmospheric emissions. The model proposed by the authors can be used to analyze and predict effectiveness of the petrochemical manufacturing greening.
Control of operating modes of an electroadsorption apparatus with a fixed layer of adsorbent
Authors: Merentsov N A , Persidskiy A V , Topilin M V , Golovanchikov A B
Published: November 2020

This paper provides a new scheme and algorithm of automated control of modes of operation of electroadsorption mass transfer apparatuses are presented on the example of a continuously operating electroadsorber with a fixed adsorbent layer. The required values of technological parameters and ranges of their regulation were obtained during the calibration of technological parameters at the stage of commissioning of the electric adsorption mass transfer equipment, also in an automated mode. A detailed description and algorithm of the stages of calibration of technological parameters of electroadsorption apparatuses with a fixed adsorbent layer are given in the second part of this work (Calibration of technological parameters of an electroadsorption apparatus with a fixed layer of adsorbent). The principle of automated control consists in self-adaptation of the mass exchange system to optimal productiveness, due to the imposition of adjustable electric fields of a given intensity on the adsorption processes and recognition of the most effective hydromechanical modes flow about of the surfaces of the adsorbent granules with a continuous gas phase flow using the turbulization index, that is, assessing the contribution of the inertial component of the structure filtration flow of a continuous gas phase flow through the adsorbent layer. A self-adaptive automated control system for electroadsorption processes will allow achieving the highest levels of gas emissions purification, with optimal energy costs for mass transfer processes, and will provide an opportunity to smooth out technological, large-scale and other factors inherent in specific mass transfer processes and apparatus designs. The most important feature of the developed self-adaptive control system is multi-functionality and a wide range of variation of operating modes from energy-saving optimal modes to emergency capture modes in cases of emergency emissions and unexpected bursts of concentrations of harmful captured substances from the continuous gas phase flow.
Simulation of combustion of a flat layer of methane hydrate
Authors: Davletshina M R , Stolpovsky M V , Gimaltdinov I K
Published: November 2020

A mathematical model of the combustion of a flat layer of methane hydrate is presented, which includes the continuity equations for the gas mixture, the conservation of the mass of each of its components, as well as the heat balance in the gas and gas hydrate layers. In addition, the system is supplemented by the conditions following the laws of conservation of mass and heat at the boundary of the “gas hydrate - gas” phase transition. The distributions of the concentration fields of the gas mixture, as well as the temperature fields in the gas hydrate and gas, are plotted.
Effects of abdomen undulation in energy consumption and stability for monarch butterfly
Authors: Tejaswi K C , Sridhar Madhu K , Kang Chang-kwon , Lee Taeyoung
Published: November 2020

The flight of monarch butterflies is characterized by a relatively large wing, flapping at a relatively low frequency coupled with abdomen undulation. This paper presents the dynamics of a flapping wing flyer that can be applied to the coupled motion of the wing, body, and abdomen at the monarch butterfly scale, which is formulated directly on the configuration manifold. The resulting thorax and abdomen motion as well as the resultant forces are consistent with the flight of a live monarch butterfly. Based on these, beneficial effects of the abdomen undulation in the flight of monarch butterflies are illustrated. For both hover and forward-climbing trajectories, the abdomen undulation results in a reduction of the energy and power consumption. Furthermore, the Floquet stability analysis shows that the periodic orbits associated with both flight modes are stable. In particular, the abdomen undulation improves the stability. Compared to the dynamics of hawkmoth, bumblebee, and fruitfly models, the monarch possesses superior stability properties.
Sensitivity of estimated NO2-attributable pediatric asthma incidence to grid resolution and urbanicity
Authors: Mohegh Arash , Goldberg Daniel , Achakulwisut Pattanun , Anenberg Susan C
Published: November 2020

Nitrogen dioxide (NO2) is a major urban air pollutant and is associated with new onset asthma among children worldwide. Since NO2 concentrations are spatially heterogeneous and correlated with population, the spatial resolution of concentration estimates and disease burden calculations could strongly influence the magnitude and spatial distribution of estimated NO2-attributable pediatric asthma (PA) cases. Here, we investigate the effect of spatial resolution of exposure and population data on estimated NO2 attributable PA incidence. We use epidemiologically derived health impact functions to estimate NO2-attributable asthma incidence for the U.S. and India, two countries with different degrees of urbanicity, using population and NO2 concentration estimates at 100 m resolution and aggregated to coarser spatial resolutions: 500 m, 1 km, 10 km, and 100 km. Estimated NO2-attributable PA burdens differ by <1% for resolutions of 100 m up to 1 km for both countries. However, performing the analysis at 10 km and 100 km results in 5% and 17% fewer new asthma cases among children in India and 6% and 32% fewer in the U.S., respectively. We performed a similar analysis for the 13 000 urban areas and present the results for the 500 most populated cities at 1 km and 10 km resolution, finding that the coarser resolution leads to lower estimated NO2-attributable asthma incidence in nearly all cities, especially for cities with smaller land areas. We conclude that 1 km spatial resolution is a good balance between accuracy and computational efficiency in estimating NO2-attributable asthma burdens at national and urban levels, and that coarser resolutions may result in underestimates.
Hydropeaked rivers need attention
Authors: Batalla R J , Gibbins C N , Alcázar J , Brasington J , Buendia C , Garcia C , Llena M , López R , Palau A , Rennie C , Wheaton J M , Vericat D
Published: November 2020

Hydropower is considered a renewable form of energy production, but generating electricity from rivers is not always environmentally benign. The global demand for renewables is increasing rapidly as fossil fuels are gradually phased out, so rivers will continue to be subjected to the pressures imposed by hydropower for decades to come. Finding ways of operating hydropower plants that limit impacts on downstream river ecosystems is therefore a pressing global concern. Usually, these plants cause marked and rapid fluctuations in flow in downstream river reaches, termed ‘hydropeaking’. Hydropeaks result in a variety of ecological changes in the dynamic mountain rivers they typically affect; declines in fish and insect populations are evident, especially in reaches immediately downstream from the plant. While these changes are often acute and readily apparent, the underlying causal mechanisms remain unclear. We argue here that riverbed sediments are a critical but neglected causal link between hydropeaking flow regimes and ecological changes. We outline how a variety of tools from different branches of river science can now be brought together to understand precisely why hydropeaking alters sediment dynamics; these tools provide a mechanistic explanation for changes in bed sedimentary conditions and channel form across multiple scales and, consequently, a better understanding of ecological changes. By allowing us to simulate the effects of flow fluctuations on sediment dynamics and channel form, these tools also allow us to develop ways of releasing water from hydropeaking dams that limit impacts on aquatic habitat and species.
Radiation protection risk control method of nuclear power project based on sequence optimization
Authors: Fu Chunliang , Zhou Jun , Lin Jiangjing , Gong Linhua
Published: November 2020

In order to protect the construction safety of nuclear power project and improve the radiation protection effect of nuclear power project, this paper introduces the sequence optimization algorithm to study the risk control method of nuclear power project radiation protection. The radiation risk level of nuclear power project is divided by sequential optimization algorithm, and the control structure of radiation protection risk of nuclear power project is optimized. In this paper, the radiation protection risk detection procedure is used to improve the radiation protection risk detection process of nuclear power engineering, so as to enhance the control effect of radiation protection risk of nuclear power engineering. In order to verify the protective effect of this method, a comparative experiment was designed. The results show that the radiation protection risk control method based on sequence optimization has high control accuracy in the practical application process, which fully meets the research requirements.
Numerical simulation study on support design of deep roadway
Authors: Shan Renliang , Li Minzu , Liu Weijun , Guo Yifei , Liu Jian
Published: November 2020

In order to solve the problem of large deformation in deep roadway mining, the stress and deformation of surrounding rock after roadway excavation and support are studied by numerical simulation. The results show that the displacement of roof and two sides is large after the roadwayexcavation. After adopting bolt support technology, the displacement of the roof and two sides of the roadway decreases obviously. The displacement decreases with the decrease of bolt spacing, the range of plastic zone decreases greatly, and the overall strength of the surrounding rock of the roadway increases obviously. The research results can provide reference for other deep roadway support.
A Study on the Technology Diffusion of China’s Solar Photovoltaic Based on Bass and Generalized Bass Model
Authors: Zhang Xiangcheng , Li Hongxia , Liu Qingbiao , Tan Xu
Published: November 2020

China’s solar photovoltaic (PV) power generation has been developing rapidly and is in a priority position in the national energy strategy. In order to effectively coordinate the development scale, speed of solar PV and economic development, the Chinese government has constantly issued various solar PV development plans. However, as a new renewable energy generation technology, solar PV is still making technological innovation to achieve technological breakthroughs. In addition, external factors, such as resource potential and power grid consumption capacity, will influence its development. It is very important to explore the development path of solar PV in China and analyze the action mechanism of each influencing factor on the development path of solar PV. Based on the technology diffusion model, this study analyzes and predicts the technology diffusion trend of solar PV generation in China. The research finds: that 1) cost is still a big obstacle facing the large-scale development of PV generation at present; that 2) national economic operation, policy incentive intensity and other factors have limited influence on the development of solar PV generation; that 3) technological innovation and power grid absorption capacity are key factors affecting the development path of solar PV.
Fast Reconfiguration of Distribution Network Based on Deep Reinforcement Learning Algorithm
Authors: Zhao Bincheng , Han Xueshan , Ma Yiran , Li Zhiqi
Published: November 2020

In the context of large-scale grid connection of distributed energy, during the reconfiguration of the distribution network, the availability of distributed energy and the load of the distribution system may be inconsistent with the prediction due to the influence of environmental factors and human factors. If the distribution network reconfiguration is still carried out according to the expected offline optimization scheme, there may be reliability problems of voltage over-limits and economic problems of increased network loss in the actual reconfiguration process. Therefore, the reconfiguration plan formulated in advance can give some guidance to the dispatch operator, but it may not be directly used in the actual reconfiguration process. This paper proposes a deep reinforcement learning approach to solving the electric distribution network reconfiguration. Based on the uncertainty of distributed energy output and network load in the distribution network, the online algorithm of distribution network reconfiguration realizes the second-level solution of distribution network reconfiguration, through day-ahead training of the neural network.
Operation Strategy Optimization of Energy Storage Power Station Based on multi-Station Integration
Authors: Xu Wenbo , Li Qiang , Chen Jing , Yuan Fusheng , Bai Zhonghua , Yu Zongze , Miao Changhai , Ma Hongbo
Published: November 2020

In the multi-station integration scenario, energy storage power stations need to be used efficiently to improve the economics of the project. In this paper, the life model of the energy storage power station, the load model of the edge data center and charging station, and the energy storage transaction model are constructed. Using the two-layer optimization method and the particle swarm optimization algorithm, it is proposed that the energy storage power station play a role in the integration of multiple stations Optimal operation strategy algorithm in a complex scenario with multiple functions. It is concluded that in a continuous period group with the same electricity price, the energy storage power station is charged and discharged at the same rate as the best operation strategy; the optimal operation strategy is determined by various factors such as time-of-use electricity price, battery life characteristics, and load characteristics of multiple stations in adjacent time groups.
A new energy management integrated service system with four meters in one network
Authors: Song Xinxin , Huang Erdong , Xu Yuanyuan
Published: November 2020

With the development of electron and computer, automatic meter reading system (AMRS) has a possibility to be put into reality. Especially for the well-to-do uptown, the construct department of China has demanded to realize integrate management of water meter, kilowatt-hour meter and gas meter step by step, gradually to realize automatic meter reading, measuring and charging with computer. This paper aims at the existing problems, such as independent charging for the above meters, bad real- timing measuring data, low efficiency, inaccuracy. Thus, an automatic meter reading system of water electricity, gas, and calorie is designed. The strong point of this system is: low cost, precise measuring, stable working, and easy to install and maintain. AMRS realized the remote meter reading of water, electricity, gas and heat. It solved the problems of independent charging, manual data processing, and complicated charging. It will boost the automatic meter reading efficiently and has an enormous application prospect.
Application Test and Analysis of 2m/8m optical satellite in coastal zone survey
Authors: Li Wenjuan , Pang Jumei
Published: November 2020

The 2-meter/8meter optical satellite (GF-1 B, C, D) constellation was successfully launched on March 31, 2018. The constellation consists of three operational satellites with the same performance and status. The design life of the satellite is 6 years;The panchromatic spatial resolution is 2m and the multispectral resolution was better than 8 m; single star imaging width is greater than 60 km The three satellites will have a global coverage of 15 days and a revisit capacity of two days. In this paper, GF-1C satellite was used to investigate the ecological and geological environmental problems in the silty coastal zone in northern Jiangsu province, and we contrast and analysis the ability of ecological and geological environmental investigations of GF1C satellite in the coastal water boundary line, coastal type, human engineering activities and so on[1] [3].
Application Research on Pulse Continuous Discharge-type Interference Bed Separator
Authors: Liu Xin
Published: November 2020

In view of the problems of the traditional interference bed separator, such as hole plugging, wall material accumulation and discontinuity of tailings discharge, the mechanical structure of the separator is improved and optimized, and a forced discharge jammer is added, rotating at a constant speed in a flow field at a low speed. According to the laboratory model, the flow field distribution in the main tank of the separator is numerically analyzed to determine the rotational speed and range of the forced discharge jammer, the experiments of slime screening, disturbing bed separation and coal slime floating and sinking are carried out on the 1 / 3 coking coarse coal slime. The analysis and experimental results show that the possible deviation of Pulse Continuous Discharge-type Interference Bed Separator on 1 ∼ 0.25mm narrow-grained coarse slime is 0.146, indicating that the separation effect is better.