bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of correction factor about electronic loss and fluorescence and scattering for W/MO X‐rays
Authors: Wang Ji , Ren Shiwei , Wu Jinjie , Guo Siming , Li Hongjie
Published: October 2019

The Monte–Carlo (MC) program EGSnrc was used to establish the model of low‐energy radiation field and low‐energy free air ionisation chamber. The electron loss correction factor and the fluorescence scattering correction factor of the molybdenum‐filtered X‐ray radiation of 23 ∼ 35kv tungsten target were simulated. The results show that due to the low effective energy of the radiation and the energy is close, the influence of the electronic loss correction factor is negligible, and the fluorescence and scattering correction factors increase slightly with the increase of the effective energy.
Fault diagnosis for space utilisation
Authors: Sun Yuanyuan , Guo Lili , Wang Yongming , Ma Zhongsong , Niu Yi
Published: October 2019

The space application task is to carry out various scientific experiments and applied research by using the ability of space experiment of spacecraft. In the past 20 years, >50 space application studies have been carried out in Chinese manned space flight application system, >500 units have been involved in the previous flight missions, and fruitful results have been achieved. The white paper ‘Chinese spaceflight in 2016’ pointed out that in the next 5 years, Chinese satellite system will enhance the level and basic ability to construct the satellite system. Chinese manned space station project is scheduled to be completed ∼2022 and it will plan to operate >10 years. The space station, based on the world‐wide integrated information network, has a large number of payloads and will become a national space laboratory. Space activities are full of risks and challenges. On the basis of a great deal of literatures, the method of avoiding space risk in the field of spaceflight is discussed. Aiming at the fault diagnosis task for space utilisation, the intelligent methods of deep learning including deep belief network, convolutional neural network and generative adversarial network are discussed.
Client analysis and interface design of mobile meteorological service in low altitude airspace
Authors: Feng Dengchao , Li Aowei
Published: October 2019

Low altitude airspace mobile weather service is based on the short service of meteorological services in China's rapidly developing low altitude navigation industry. Through the analysis of the weather information data acquisition status and the analysis of the main meteorological service software products in the market, it is concluded that professional low altitude weather service software products are needed to meet the demand of low altitude aircraft operation. The software interface design of low altitude airspace mobile meteorological service demand function is analysed, and the Android technology is used to design and implement the client interface of meteorological services.
Implementation of NRF in the Docker‐based NFV platform
Authors: Liu Shasha , Xu Zhan , Tian Zhigang
Published: October 2019

Network function virtualisation (NFV) represents one of the key enablers of the next generation mobile network systems (5G). NFV allows running virtual network functions (NFs) as software components on top of a virtualisation system (i.e. virtual machines or containers) hosted in a cloud, allowing high flexibility and elasticity to deploy network services and functions. Therefore, the NFs in 5G core network can be deployed on the common hardware platform in the form of software. In this study, network repository function (NRF) is implemented in Docker‐based NFV platform in the form of JSON + HTTP/2.0 that supports service discovery function. The performance of NRF is also tested on real hardware platforms, including NF Register, NF Update, and NF Deregister. From the experimental data, it can be seen that the NRF in the NFV‐based 5G architecture has good performance, and Docker‐based NFV platform is more flexible than traditional communication networks.
Design of airborne target tracking accelerator based on KCF
Authors: Yang Haoran , Yu Jinxiang , Wang Shaojun , Peng Xiyuan
Published: October 2019

The on‐board target tracking of unmanned aerial vehicle (UAV) relies on on‐board computer to process the collected ground image information, and then use the target tracking algorithm to achieve the target tracking function, which provides the user with target position, trajectory and other information. UAVs are limited by load and power consumption. Due to the high resolution and frame rate of UAV's image collection system, traditional target tracking platforms cannot meet the requirements. As a result, the real‐time nature of the tracking platform urgently needs to be resolved. This study designs and implements the airborne ground target tracking accelerator for UAV. The kernelised correlation filters (KCFs) algorithm with low computational complexity and precision is selected to achieve the airborne ground target tracking function and its performance bottleneck is analysed. In order to improve the real‐time performance of the tracking task processing, the ZYNQ platform based on ARM and field programmable gate arrays is chosen to achieve the hardware acceleration of the KCF algorithm. The KCF algorithm is implemented in hardware using the high‐level synthesis technology, and a high‐speed data transmission link is established. Experiments show that the design can achieve a tracking rate of more than 30 FPS under 960 × 540 resolution, which meets the real‐time requirements of UAV target tracking task.
Study on defect type in eddy‐current testing based on phase spectrum analysis
Authors: Zhang Ronghua , Ye Song
Published: October 2019

This article proposes the use of phase angle gradient as a feature to detect and classify different types of defects. Based on the principle of eddy‐current testing (ECT), the ECT platform was designed and manufactured. Based on phase‐sensitive demodulation principle, the phase angle and gradient of the detected signal are analysed. The results show that the phase angles and phase angle gradients of different types of defect detection signals show different trends; the phase angle gradient of the integrated position direction and frequency direction can effectively identify the defect type.
Intelligent fault diagnosis system based on big data
Authors: Wu Tianshu , Chen Shuyu , Wu Peng
Published: October 2019

In view of the actual problems existing in life‐cycle health monitoring and diagnosis of large complex equipment, the machine‐learning algorithm is applied to data mining of the equipment operation big data, the expert knowledge base is established, the diagnosis rules related to the fault are obtained, the intelligent online monitoring and remote diagnosis of the equipment health condition are realised. The system uses uncertain fault prediction method and hybrid intelligent algorithm to discover the hierarchical association between operation feature big data and operation faults, the feature extraction of operation faults, and the intelligent diagnosis of operation faults. It effectively improved the sensitivity, robustness, and accuracy of monitoring and diagnosis. In the cloud service platform based on the Internet of things, the system realises the intelligent fault prediction and diagnosis, establishes a proactive maintenance system, improves the production efficiency, and ensures the production safety.
Design of tool‐state monitoring system based on current method
Authors: Sun Weiwei , Huang Min , He Yiqian , Li Kang
Published: October 2019

Tool failure is one of the main causes of failure in CNC machine tool machining. The real‐time online monitoring technology of CNC machine tool is studied, which is helpful to improve the efficiency of failure‐free operation of CNC machine tool and reduce the probability of scrap and equipment failure due to tool failure. Here, the correlation between inverter input current and tool wear condition was studied first, based on which a new method about how to calculate line current on inverter input side was defined, according to definition of current virtual value. Then, a real‐time monitoring system for online tool wear is designed and developed. The experimental results show that the system can reflect the tool wear condition and remind to change tool timely.
Energy calibration and performance testing of LEGe detector
Authors: Hou Dongjie , Wu Chong , Li Chengze , Guo Siming , Wu Jinjie
Published: October 2019

The low energy germanium detector (LEGe) is in all aspects optimised for performance at low and moderate energies. It has specific advantages over conventional planar or coaxial detectors. LEGe is a kind of semiconductor detector commonly used in X‐ray detection. It can display the spectrum of X‐ray and record photon counts. Photon fluence is used to describe the radiation field by recording the number of incident photons. In order to take full advantage of the low energy response of this intrinsically thin window detector, LEGe cryostats are usually equipped with a beryllium window, thin front and side contact allowing spectroscopy from 3 keV and above. The rear contact is of less than full area which gives a lower detector capacitance compared to a planar device of similar size. It is widely used in low energy gamma spectroscopy, X‐ray absorption spectroscopy, nuclear safeguards or X‐ray fluorescence spectrometer and X‐ray diffraction. Spectrum is an intuitional and accurate description of X‐ray radiation. In this work, experiment was carried out to calibrate the detector and test the spectrum, and then to calculate the energy resolution. The experiment results about energy resolution (full width at half maximum) are 222 eV (@5.9 keV) and 519 eV (@122 keV).
Design and application of the automatic AC voltage test device for smart electricity meters and data acquire terminal of the special transformer
Authors: Wang Pingxin , Zhang Zhi , Dai Yanjie , Li Congcong , Du Yan , Dong Xianguang , Chen Zhiru , Zhu Hongxia , Li Lin , Yang Jie , Yu Chao
Published: October 2019

The AC voltage test is an important means to effectively detect the insulation defects of the equipment. The problems of low efficiency, poor safety, and poor compatibility of the AC voltage test for smart electricity meters and data acquire terminal of the special transformer, the fully automatic AC voltage test device are studied and designed by software programming, PLC control technology, and automatic crimping technology. The automatic test and result judgment of the AC voltage test for the smart electricity meters and data acquire terminal of the special transformer are realised, which makes many problems of the existing test equipment to be effectively solved. Thus, the efficiency, compatibility, safety and reliability of the test are improved.
Intelligent classification on images of Dongba ancient books
Authors: Hua Ruxiang , Xu Xiaoli
Published: October 2019

Dongba hieroglyphs are the only living hieroglyphs in the world today and are still used by people. The various ritual activities in Dongba culture are passed down through the Dongba hieroglyphs in the form of books. In view of the current classification and preservation of Dongba ancient books, it is a matter of labour‐intensive time for translation, cataloguing, integration, and classification, so combining the methods of convolutional neural networks (CNN), an intelligent classification model is established to directly identify and classify ancient images. As the structure of the CNN has a great influence on the final recognition accuracy, a network structure that is most suitable for image recognition of Dongba ancient books is proposed. Experiments are performed on the Dongba image base established by myself and the result proves that the feasibility and effectiveness of this method.
Le boom de l’anacarde en Côte d’Ivoire : transition écologique et sociale des systèmes à base de coton et de cacao
Authors: Ruf François , Kone Siaka , Bebo Boniface
Published: October 2019

Le dynamisme agricole de la Côte d’Ivoire continue de surprendre les marchés de matières premières, en particulier ceux du cacao et du caoutchouc. Le pays s’empare aussi de la place de premier producteur mondial d’anacarde. Comment interpréter ce boom ? Il est en partie lié aux marchés (stagnation des prix du coton et du cacao, hausse du prix de l’anacarde sur deux périodes), mais les déterminants sont beaucoup plus complexes. L’hypothèse de l’étude est que l’adoption de l’anacardier relève en partie d’une transition écologique d’adaptation à l’épuisement de la rente forêt et au changement climatique, au coût croissant des intrants chimiques pour le coton et le cacao, mais répond aussi à l’insécurité foncière. Cette hypothèse a été testée en 2016–2017 sur 6 sites d’étude, choisis selon un gradient nord-sud : Mankono, Konanhiri, Bonon, Yamoussoukro, Bayota-Gagnoa et Soubré, à raison de 40 à 100 exploitations par site, avec des actualisations partielles en 2018. Ces enquêtes confirment l’hypothèse. L’anacardier, arbre robuste, résistant aux sécheresses, évite pour l’instant aux planteurs tout recours aux intrants chimiques et au crédit, reconstitue un ombrage forestier et est aussi un marqueur de terre (il apporte une sécurité foncière informelle dans le village d’origine des planteurs migrants, mais aussi dans leur village cacaoyer). Il devient l’outil d’une transition écologique et sociale. Cette transition inclut des flux significatifs d’information, de travail et d’investissement entre les deux espaces économiques. Elle relève essentiellement d’une innovation paysanne. En zone cacaoyère, l’anacardier, dans sa dimension agroforestière sous forme d’association avec le cacaoyer, réduit la mortalité des jeunes plants de cacao, et son adoption prend tout son sens de transition agroécologique. L’agriculture familiale est-elle en train de réaliser seule ce que l’industrie du chocolat promet sur le papier : une cacaoculture « zéro-déforestation » et durable ?
Thermal and aerodynamic characteristics of tube furnaces with wall burners of two types
Authors: Vafin D. B.
Published: October 2019

Tube furnaces of the petrochemical and oil refining industries are energy-intensive devices. The differential method for calculating the complex heat transfer in the furnaces is used to study the flow fields and the temperature of the combustion products in the radiation chambers of technological tube furnaces with two types of wall burners, which are placed on several levels on the sidewall. In a furnace designed for the conversion of methane mixed with steam in the reaction tubes, acoustic burners for burning natural gas near the wall are installed in three tiers on the side lined sidewalls of the radiation chamber. In the primary reforming furnace of natural gas for the production of ammonium nitrate, wall-type burners are installed on six levels. The method used is based on the joint numerical integration of the two-dimensional differential equations of energy transfer by radiation using the S2-approximation of the discrete ordinate method, the energy conservation equations, the equations of turbulent motion of a gas mixture, the k-e turbulence model and the two-stage gas fuel combustion model. The calculated fields of temperature and flue gas flow obtained with the help of a computer program implementing the proposed method are discussed.
Differential method for damage location determining in 10 kV distribution networks with isolated neutral
Authors: Kozlov V. , Kirzhatskikh E. , Giniatullin R.
Published: October 2019

Half of the length of all transmission lines (TL) are medium voltage networks. Single-line-to-ground short circuit (SLGSC) in distribution networks is the most common type of damage, accounting up to 70% of all types of damage. Faults in damage repair leads to an overvoltage of two healthy phases, resulting in double shorts, two-, three-phase shorts, which contributes to consumers’ disconnection. Remote damage location (DL) determination in tree-type networks is considered to be the most relevant, since these networks are spread over large areas, crossing rivers, ravines, lakes, forests, etc. This paper presents a differential method for DL determining based on steady-state voltage of damaged phase frequency. Measuring the parameters of emergency mode at the beginning and at the ends of 10kV TL allows compact stand-alone sensors using without their synchronization.
Numerical study of heat transfer in rectangular channels with single pin fin and pin fin-dimple
Authors: Rogalev A. N. , Rogalev N. D. , Kindra V. O. , Osipov S. K. , Zonov A. S.
Published: October 2019

Evaluation of the heat transfer and hydraulic performance of a new pin fin-dimple cooling system in a rectangular channel shows its advantage. The performance are compared with the pin fin system ones with 3-D Reynolds averaged Navier-Stokes (RANS) equations. The fluid flow and heat transfer analysis for the Reynolds numbers from 8000 to 70000 involved the shear stress transport turbulence model. The new system forms a high-intensity vortex around the pin fin-dimple that increases the near-wall turbulent mixing level that intensifies the heat transfer. The calculation results indicate increases of the averaged Nusselt number and the averaged friction factor of 7–13% and 7–12% respectively against the pin fin.
Dynamic Conditions for a Three-level LLC Converter with a Phase-Pulse Control
Authors: Bykov K. V. , Lazareva N. M. , Yarov V. M.
Published: October 2019

Usually, parametric synthesis of controllers for a closed control system is carried out for nominal conditions, and then the source performance for other load resistance values is estimated. As a result, the control system may not always provide the sufficient mode stabilization with a changing load resistance value. The paper suggests an alternative version. It deals with estimation of dynamic transient responses for the required mode parameter in an open-circuit system as well as with determination of transfer functions and the controller parameters for the most complicated version of transient response curves. The paper presents the results of simulation modelling of dynamic operating conditions for LLC converter using Simulink Matlab as well as load characteristics for three versions of a closed control system.
Effect of preparation of wood raw materials and some processing modes on the output of liquid pyrolysis products
Authors: Safin R. R. , Galyavetdinov N. R. , Mukhametzyanov S. R. , Ilalova G. F. , Valeev I. A. , Safina A. V.
Published: October 2019

Today, the limitations of traditional energy sources based on oil, natural gas and coal are becoming obvious. Therefore, the search for new sources of energy is a pressing issue both for modern Russia and for the whole world. The alternative sources of energy, based on the use of bioenergy of biomass, begin to play a significant and growing role in the world energy industry. The article presents the curves of changes in the mass yield of products obtained during the pyrolysis of biomass, thermally pre-treated in the temperature range of 180-270 °C without access of oxygen. It has been experimentally proved that pre-heat treatment reduced the total liquid yield in the pyrolysis process: with an increase in the processing temperature, the mass yield of the liquid decreased, but the mass yield of charcoal and gas changed slightly. At the same time, it was found that the temperature affected the yield of the elemental composition of biomass: as the temperature increased, the content of elemental carbon in the biomass increased, while the content of hydrogen and oxygen decreased. It is concluded that the preliminary heat treatment of biomass can improve the quality of the final liquid biofuel by reducing the water content in it and by increasing the heat of combustion. It is also found that pressure reduction during the pyrolysis process increased the yield of the liquid fraction of decomposition products.
Underwater Laying of Pipes for Heating Networks of Energy Systems
Authors: Gorinov Y. A.
Published: October 2019

The article is devoted to the development of a new pipe-laying technology for heating networks of energy systems when crossing water barriers. In this paper a piping structure consisting of a carrier steel pipe enclosed in composite material for heat insulation and ballasting with an outer protective polyethylene casing is described. Theoretical and experimental studies of the structure are presented, mathematical models of the physicomechanical properties of the proposed composite material are developed, a technical-and-economic assessment is carried out.
Efficiency of biomass and solid waste energy processing based on the cogeneration plant with plasma heat source
Authors: Sadrtdinov A. R. , Galeev T. K. , Mazarov I. Y. , Safin R. G. , Saldaev V. A. , Gusev V. G.
Published: October 2019

The urgency of the use of low-grade organic fuels and wastes, in particular municipal solid (MSW), is due to recent developments in energy saving and energy efficiency. This directly relates to the direction of renewable energy, responsible for involving all wastes, such as MSW, in fuel energy balance to provide heat and electricity to decentralized power supply areas. This paper presents the process of high-temperature thermal decomposition of MSW in the steam-air medium of plasma under excessive pressure to generate electrical energy. The high enthalpy and great reactivity of the plasma gasifying agent makes it possible to carry out the process of thermal decomposition in the autothermal mode. The high-temperature mode and the use of plasma blast provides a high degree of conversion of waste into combustible components (CO, CH4, H2), the resulting gas mixture. The technological process significantly reduces the formation of potentially hazardous substances that affect the kinetics of the process. After generating electrical energy, the exhaust gases are subjected to complex purification from the products of combustion and cogeneration of residual thermal energy. In particular, purification from toxic nitrogen oxides (NOx) occurs, the formation of dioxins, furans and other dangerous derivatives of chloride compounds is prevented. Thermal energy, discharged at various sites of the plant, is almost completely used for the needs of the cogeneration plant and its units, which allows to achieve a total efficiency of at least 86%. The ability of the cogeneration plant to work on various types of solid waste gives a wide range of applications and operational capabilities.
Determination of the conditions of spontaneous combustion of a rheologically complex medium inside the continuous infinite cylinder in convective heat transfer case
Authors: Livshits S. A. , Yudina N. A. , Novikova O. V. , Katz D. B. , Nagornov V.N.
Published: October 2019

We obtain the dependence of the relative temperature of a rheologically complex medium depending on the distance to the center of the cylinder. The conditions of spontaneous combustion and the stability of the solutions obtained were investigated, and the approximations of the expressions obtained were carried out. The results obtained in this work allowed us to determine the areas of occurrence of critical flow regimes inside a hollow cylinder under thermal boundary conditions of the 1st and 3rd kind.
Energy saving system of cascade variable frequency induction electric drive
Authors: Meshcheryakov V. N. , Lastochkin D. V. , Shakurova Z.M. , Valtchev S.
Published: October 2019

This paper discusses the wound rotor induction motor and variable-frequency drive (VFD) that regulates the stator voltage frequency. The stator and rotor windings are connected to a common electrical circuit. The slip energy of the motor goes to the DC link and feeds the stator winding of the motor. The block diagram of the electric drive, the equivalent circuit and the basic characteristic of the cascade VFD are considered. It is shown that the energy-saving mode with a minimum ratio “stator current/torque” is achieved at an angle between vectors of the stator current and the excitation current at the level of 45 degrees. The experimental static mechanical characteristics of the electric drive were obtained. These characteristics provide a limitation of the starting torque.
Improving power quality by calculating voltage losses
Authors: Borodin M. , Psarev A. , Kudinova T. , Mukhametzhanov R.
Published: October 2019

The problem of improving power quality (PQ) in the integrated power grid of Russia is an urgent task. The article analyzes the number of power consumers’ calls to Kromskiye District Power Networks “Orelenergo”, a branch of the PJSC “IDGC of the Center” for the issue that power quality indices go beyond the standards established in the regulations. The most common complaints of power consumers are low voltage, high voltage, voltage fluctuations. This is primarily due to physical and obsolete depreciation of the main power grid equipment of the power supply organization, disinterest of consumers and the power supply organization in maintaining power quality at the level of regulations, as well as the lack of power supply or-ganization’s software products that allow real-time voltage loss calculations and offer measures to improve the power quality. The presented algorithm, based on calculations of voltage losses, suggests measures to improve the power quality. The application of the proposed algorithm of the program will allow to increase PQ by means of timely determination of voltage losses.
Superconducting technologies for renewable energy
Authors: Kovalev K. , Poltavets V. , Kolchanova I.
Published: October 2019

The main trends in the development of modern wind-mills are increasing of the output power and efficiency which leds to the increasing of their weight and sizes. The application of high temperature superconducting (HTS) technologies can solve these problems. The article describes of the designs 1 MVA superconducting synchronous generator and 5MJ flywheel energy storage systems (FESS) with HTS magnetic suspension for autonomous wind power engineering.
Research of pH influence on sorption properties of sorbents on a basis of residual biomass of microalgae Chlorella sorokiniana and duckweed Lemna minor
Authors: Politayeva N.A. , Smyatskaya Yu.A. , Dolbnya I.V. , Kasobov L.S. , Rakhimov D.B. , Zaripova D.A.
Published: October 2019

This scientific research is determined to a study of sorption process of heavy metal ions removal from aqueous solution at water purification with a help of sorption materials on a basis of residual biomass of microalgae and duckweed. It is known that Chlorella sorokiniana and duckweed Lemna minor have in their composition different valuable substances such as lipids, proteins, pigments, pectic substances. After their extraction residual biomass is formed. And in present study it is proposed for using as biosorbent for water purification. At different pH values the removal of ions of heavy metals (Zn(II), Cd(II), Pb(II), Cu(II)) occurs with varied efficiency; it is an important and informative parameter. Equilibrium and initial concentration of the solution with heavy metal ions were measured by voltammetric method of analysis with a use of special equipment. Chitosan was used as a component for making composite sorption materials with residual biomass of microalgae and duckweed. It is biopolymer which widely used in water purification. Due to this, prepared granules have good sorption properties. Nowadays in the era of technology and wide industrial production it is important and actual to develop new ecological technology and useful materials for water treatment and other fields for environment protection in general.
Influence of the drying method on the sorption properties the biomass of Chlorella sorokiniana microalgae
Authors: Smyatskaya Y. , Toumi A. , Atamaniuk I. , Vladimirov Ia. , Donaev F.K. , Akhmetova I.G.
Published: October 2019

In this paper, it is proposed to use the biomass of microalgae Chlorella sorokiniana as a biosorbent for wastewater treatment, as well as an oral sorbent. Biosorbents are capable of adsorbing both organic and inorganic compounds, including heavy metals. The sorption capacity depends on the type of aquatic plant and microalgae strain. The use of microalgae and aquatic plants as biosorbents for pollutant treatments is discussed in the introduction part. The biomass of microalgae Chlorella sorokiniana was chosen as the object of this study. The cultivation conditions (temperature, light, pH and aeration) and the optimal biomass harvesting parameters are presented. Dehydration of biomass was carried out in two ways: IR-drying and freeze-drying. The obtained samples were tested for the ability of the biomass to extract heavy metal ions (zinc, cadmium, zinc, copper) from standard solutions. The initial concentration of heavy metal ions in the working solutions was 10 mg/l. Results show that the lyophilized samples demonstrated up to 99.9% of heavy metal removal efficiency. The paper also presents the composition of Chlorella sorokiniana biomass, in which up to 40.97–41.87% are proteins. The analysis of the amino-acid composition showed a ratio of essential to non-essential amino-acids higher than 0.8. All the above results confirm the possibility of using microalgae biomass as an oral sorbent and as an additive in the production of functional foods.
Method of analysis and monitoring of the electromechanical converters parameters based on a linear integral criterion using sensitivity models
Authors: Malev N. A. , Mukhametshin A. I. , Pogoditsky O. V. , Mwaku W. M.
Published: October 2019

During the electromechanical converters operation in the composition of the working sets, objects parameters can change both under the influence of external factors, such as changes in the environmental characteristics, and due to parametric disturbances caused by changes of the physical characteristics of electromechanical converters elements. In this regard, the analysis and monitoring of electromechanical converters parameters is an important task. The article deals with a method that allows to ensure control over the operation of electromechanical converters during operation as part of working sets, based on variations analysis of the object parameters. The article provides a linear integral criterion computational scheme using the reference and sensitivity models to the parameters to be analyzed. The results provide a good way to estimate changes of the electromechanical converters parameters with the required accuracy.
Influence of resistance of contact units of switching devices on the electric power losses in shop networks of low tension
Authors: Micu D. D. , Ivshin I. V. , Gracheva E. I. , Naumov O. V. , Gorlov A. N.
Published: October 2019

This paper presents calculation of resistance of tightening contact joints of switching devices. It allows considering the technical condition of low-voltage switching equipment and to specify energy emitted in the switching device in the mode of electrical networks operation is presented in the article.
A statistical method for stastical appraisal of the power cable conditions based on the TD and PD diagsnostics result
Authors: Neier T. , Knauel J. , Bawart M. , Antipov D. , Kim S.
Published: October 2019

This study handles one of the key questions of network operators: How can the remaining life time of underground power cables be estimated? The answer to this question is explained by a new method of KEPCO Korea. When combining VLF Tan Delta (TD) and Partial Discharge (PD) diagnostic it is possible to identify and localize weak individual spots along a cable. After weak spots are cleared, the general aging condition of the cable can be evaluated and the Remaining Life Time can be estimated. The implementation of this approach in the KEPCO Distribution Networks is illustrated in a practical case study. A new tool for asset managers is available and it is expected that it will help to further develop the preventive maintenance approach by power utilities all around the world.
Parametric identification algorithm for asynchronous electric motor inverter on the switching intervals of power transistors
Authors: Andreev A. , Andreev M. , Kolesnihenko D. , Dyganova R.R. , Merzadinova G.T. , Ibraev I.K.
Published: October 2019

The authors propose an algorithm for identifying the parameters of a controlled asynchronous electric drive in real time, which provides calculation of stator and rotor resistances which change as a function of temperature. The algorithm is based on the analysis of a current tube of electric motor phase with the subsequent calculation of resistances.
Automatic condition monitoring method to find defects in high-voltage insulators using infrared images
Authors: Zaripova A. D. , Zaripov D. K. , Usachev A. E.
Published: October 2019

In recent years, infrared imaging has become an important tool, particularly for predicting and preventing electrical equipment failure. Systems for online monitoring of the equipment conditions used in electrical substations are based on computer vision algorithms to perform visual analysis, automatically detect and assess equipment condition. This article describes a developed method that automatically finds defects in high-voltage insulators using infrared images. This method is based on the Otsu method, which is one of the most popular and effective segmentation methods that can be applied to finding defects in infrared images. The result is a comparative analysis of computer vision methods in infrared images used in our research. Automatic condition monitoring to find defects in high-voltage insulators in infrared images can be considered as the base method for an automated thermal imaging system for monitoring electrical substation equipment.
The scenario of development of electric power industry in the Republic of Kazakhstan
Authors: Gel’manova Z. , Pak O. , Sivyakova G. , Zhabalova G. , Lelikova O. , Onischenko O.
Published: October 2019

The article explored the energy sector of the Republic of Kazakhstan. The data on the demand for new installed capacity are presented. The scenarios for the development of the energy sector and factors determining the characteristics of scenarios are considered. The main results of the simulation are analyzed. SWOT analysis was made in the field of saving energy and efficiency energy. Based on the results of the data, conclusions were drawn and measures were proposed.
Study of the trion spectral lines broadening in the thin Si(p)/Si(b)/ZnO film caused by the exciton-phonon interaction and other factors
Authors: Popov I.I. , Arkhireev I.A. , Vashurin N.S. , Voronin D.E. , Gladysheva A.A. , Ksenofontov S.I. , Moroz A.V. , Nikitin D.A. , Stepanov S.A. , Sushentsov N.I.
Published: October 2019

Experiments were carried out to study the contribution of the phonon wing to the uniform width of exciton states localized at room temperature on surface defects of the crystal lattice of thin single-layer and three-layer films. Technological studies were carried out to reproduce the parameters of a three-layer thin textured Si (P) / Si (B) / ZnO film to create a technology for the production of femtosecond time interval recorders based on the non-Faraday rotation of the polarized vector of the stimulated photon echo. The results of technological methods for studying the physics of the formation of trion states are discussed.
Optoelectronic complex for express laser diodes lifetime prediction
Authors: Bliznyuk Vladimir , Dolgov Alexey , Parshin Vasiliy , Rzhanov Alexey , Semenova Olga , Tarasov Alexander
Published: October 2019

This paper presents the optoelectronic complex, which provides both preparations for carrying out an express lifetime prediction of edge emitted strip single-mode laser diodes. It is shown that for this purpose the complex should consist of four operational units: an input control unit; a spectral radiation characteristics measurement unit; a laser lifetime forecasting unit and automatic processing hardware unit. The use of this complex makes it possible to predict the lifetime of a laser diode according to their spectral characteristics at the initial stage of its operation.
The luminescence thermometry based on analysing of 3P0-3H5 emission band of Pr3+ ions in Pr3+:LiYF4 nanoparticles and microparticles
Authors: Pudovkin Maksim , Korableva Stella , Lukinova Elena , Koryakovtseva Darya , Morozov Oleg , Semashko Vadim
Published: October 2019

The study is devoted to the possibility of using and Pr3+:LiYF4 microparticles and nanoparticles as luminescent thermometers in the temperature range of 80-320 K. The ratio of luminescence peaks corresponding to the transitions from the 3P0 state to two Stark sublevels of the 3H5 state of Pr3+ ions is considered as a temperature-dependent parameter. This system demonstrates an absolute temperature sensitivity of 0.0009 K-1 at a temperature of 185 K.
Quantum dots photoinduced charges dynamics – model of crystall lattice defects
Authors: Shmelev Artemiy , Nikiforov Victor , Zharkov Dmitrii , Leontyev Andrey , Lobkov Vladimir
Published: October 2019

We report the results of core-shell (CdSe/CdS) quantum dots study. Quantum dots sizes were evaluated as 2.0 and 2.9 nm from absorbance edge position. We suggest two types of traps, predict properties of these traps based on upconversion luminescence data and previous studies of quantum dots (CdSe cores only) and bulk CdS.
Experimental obtaining of polarization ghost images by ghost polarimetry
Authors: Agapov Dmitry , Magnitskiy Sergei , Chirkin Anatoly
Published: October 2019

The paper presents the experimental implementation of a new version of the ghost image method ghost polarimetry in unpolarized light. Like conventional polarimetry, ghost polarimetry is used to study the polarization properties of objects. Our proposed version of this technique is applied to objects whose influence on the polarization state of light is determined by linear dichroism. The restoration of the polarization properties of the object was carried out in the framework of the theory that we constructed on the basis of the apparatus of Jones matrices.
Fluorescence dynamics of an ensemble of cold atoms
Authors: Bozhokin Sergey , Kuraptsev Alexey
Published: October 2019

We have calculated the fluorescence dynamics of cold atoms excited by pulsed radiation. We have considered both Radon-Nikodym spectral method and multi-stage relaxation model describing collective effects in cold atomic gases. Relaxation times and amplitudes both at short times (superradiance) and long times (subradiance) have seen obtained.
Qubits and two-level atom states in representation of Malevich's squares
Authors: Chernega Vladimir , Man’ko Olga
Published: October 2019

New description of two-level atom states as well as spin-1/2 states by means of standard probability distribution is constructed. It is used as alternative of wave functions and density operators. The quantum suprematism picture of the states in terms of Malevich's squares triada is presented.
Photonic droplets in a medium of carbon nanotubes
Authors: Dvuzhilov Ilya S. , Dvuzhilova Yulia V. , Belonenko Alice M. , Boroznina Evgeniya V. , Belonenko Mikhail B.
Published: October 2019

The numerical research of the photonic droplets dynamic in a carbon nanotube medium has been carried out. A stable propagation of these pulses has been detected at times down to tens of picoseconds. The propagation features of pulses at various parameters (velocity and pulse amplitude) have been shown as well.
Method for determination of resists parameters for photonic - integrated circuits e-beam lithography on silicon nitride platform
Authors: Elmanov Ilia , Elmanova Anna , Komrakova Sophia , Golikov Alexander , Kaurova Natalya , Kovalyuk Vadim , Goltsman Gregory
Published: October 2019

In the work the thicknesses of the e-beam resists ZEP 520A and ma-N 2400 by using non-destructive method were measured, as well as recipe for the high ratio between the Si3N4 and the resists etching rate was determined. The work has a practical application for e-beam lithography of photonic-integrated circuits and nanophotonics devices based on silicon nitride platform.
Formation of non-classical optical states in spaser systems under control of an external magnetic field
Authors: Gubin Mikhail , Prokhorov Alexei
Published: October 2019

The work is focused on the investigation of features of quantum dynamics for photons in spaser systems consisting of metal nanoparticles (NP) and semiconductor quantum dots (QDs). The non-classical photon states generation in a three-particle spaser system with nonlinear plasmon-exciton interaction is predicted.
Non-Markovian dynamics of a three-level atom in a stochastic field with finite correlation time due to initial correlations
Authors: Mikhailov Victor , Troshkin Nikolay
Published: October 2019

Dynamics of a three-level atom interacting with a stochastically fluctuating environment characterized by finite correlation time is investigated in the cases of a product initial state and a correlated initial state. The correlated initial state is obtained by the state reduction caused by the von Neumann measurement on the quantum system evolved from the product initial state and surrounded by the initially stationary stochastic environment. It is shown that in case of a pure dephasing process under the influence of a Kubo-Anderson type stochastic environment, the projective measurement causes the emergence of correlations between previously independent stochastic processes, their non-stationarity, and also causes the transition from a Markovian-type evolution to a non-Markovian one.
Investigation of absorption of laser radiation by copperand nickel-based powders to obtain gradient materials by selective laser melting
Authors: Voznesenskaya Anna , Kochuev Dmitriy , Raznoschikov Artem , Kireev Andrey , Khorkov Kirill
Published: October 2019

The absorption of laser radiation of powder materials based on copper and nickel is studied. The dependence of the temperature of the powder material on the power of the incident laser radiation is obtained. A comparison of the values obtained by different measurement methods is presented.
Contribution of 3D coupled hydrodynamic-ecological modeling to assess the representativeness of a sampling protocol for lake water quality assessment
Authors: Soulignac Frédéric , Anneville Orlane , Bouffard Damien , Chanudet Vincent , Dambrine Etienne , Guénand Yann , Harmel Tristan , Ibelings Bastiaan W , Trevisan Dominique , Uittenbogaard Rob , Danis Pierre-Alain
Published: October 2019

This study deals with the impact of spatio-temporal heterogeneities on the assessment of lake ecological status according to the European water framework directive (WFD). A method, based on three-dimensional coupled hydrodynamic and ecological modeling, is presented to assess the variability of lake ecological status, and to locate the most representative sampling station of Lake Geneva (France/Switzerland). Five variables used in the lake ecological status evaluation were simulated by using the free software Delft3D. The numerical simulation results showed that the simulated ecological status based on chlorophyll a and total phosphorus concentrations measured at the regulatory monitoring station depend on the choice of the sampling date. Results also indicated a strong spatial heterogeneity in ecological status that varies from “poor” to “good” along an East-West gradient. Finally, the numerical simulation results showed that the most representative point of a mean theoretical ecological quality for Lake Geneva would be located in the center of the upper basin, close to the historical sampling station.
The students’ ecological and legal culture of professional socialization
Authors: Abbasov Pavel R. , Abbasova Elena V. , Litvak Rimma A. , Balikaeva Marina B. , Pavlichenko Anatoliy A.
Published: October 2019

The article reveals the urgency of addressing the students’ ecological and legal culture of professional socialization. There are socio-political, institutional-organizational and psychological-pedagogical factors of the problem. The article is devoted to the ecological and legal culture in the socio-cultural environment. The environmental education includes a development of personal environmental values in the socio-cultural development. The environmental education as a component of socialization is a means of the educational environment. The ecological and legal culture of students is a complex socio-cultural and psycho-pedagogical problem of the search for perspective directions and technologies in educational environment. The environmental education should have a structure in the education system.
Language Game as a Means of Creating Implicit Meanings
Authors: Natalia Berezhnykh , Natalia Sivtseva , Tatiana Skopintseva , Lyudmila Sludneva
Published: October 2019

This article presents a number of theoretical aspects of “implicit meanings” associated with their definition and reasons making communicators use indirect communication. A typical communicative situation is described in which speakers deliberately conceal the meaning. It is called a communicative triad and involves two types of addressees – “true addressee” and “unplanned participant” of communication. When considering a number of communicative situations of the triad, which are not directly intended to conceal information, one can note the analogy with the phenomenon of “language game”, as one of its features is lack of rational grounds for its functioning. The production of implicit meanings based on the language game principle is described in the form of precedent texts inclusion, where the parameters of presence/absence of the precedent text significance for different categories of recipients, as well as the different participants’ awareness of the factors and rules of the game are significant. There are two scenarios allowing participants to complicate the meaning, which correspond to the main game types distinguished in the game theory – “game-competition” and “game-presentation”. Besides, the authors analyze the use of specialized precedent phenomena, as well as simpler means of playing with the meaning based on the category of uncertainty.
Religious values in global communication of modern society: trends in the development and transformation
Authors: Bobyreva Ekaterina , Zheltukhina Marina , Korovina Kristina , Busygina Maryana
Published: October 2019

The article is devoted to the investigation of religious values development and transformation at the modern stage of society's development. The functioning of values is the influence of the latter on human activity, human behavior, on social life and on the development of culture. Religious values are the most fundamental part of any culture and society and don't change quickly. The change of values is a long process which is determined by social factors and culture of society. Values of Christianity, Islam and Buddhism show different degrees of transformation. Values of Islam turn out to be the most stable in comparison to other religions.
On study of professional sociolect as language universalia
Authors: Dvorak Ekaterina
Published: October 2019

The concept of a “professional sociolect” is considered in the paper in terms of a sociolinguistic approach. A definition is given to the language phenomenon under consideration. Sociolect is studied as a complex of a language unique features that are characteristic for some of the social group. The concept is being studied with the purpose of its structure and base components specification. The basic categories of the language phenomenon under consideration have been accentuated within the specification offered. The influence of professional sociolects on the people’s everyday utterance and their degree of stabilization in the literary canons of the national language has been also investigated by the authors. The professional sociolect of oil and gas engineers was taken as an example.