bluuebunny/crossref_metadata_2025 huggingface dataset:
Ferroelectricity and antiferromagnetism in organic–inorganic hybrid (1,4-bis(imidazol-1-ylmethyl)benzene)CuCl4·H2O
Authors: Jiang Chunli , Luo Qianqian , Fu Hanmei , Lin Hechun , Luo Chunhua , Wang Jianlu , Meng Xiangjian , Peng Hui , Duan Chun-Gang , Chu Junhao
Published: November 2019

A new [CuCl4]2− based organic–inorganic hybrid, (bix)CuCl4·H2O (bix = 1,4-bis(imidazol-1-ylmethyl)benzene), is synthesized via simple solution method, which shows the coexistence of ferroelectric and antiferromagnetic ordering in (bix)CuCl4·H2O.
Sulfur adsorption on coinage metal(100) surfaces: propensity for metal–sulfur complex formation relative to (111) surfaces
Authors: Liu Da-Jiang , Spurgeon Peter M. , Lee Jiyoung , Windus Theresa L. , Thiel Patricia A. , Evans James W.
Published: November 2019

DFT analysis explains the propensity for stable metal–S complexes on (111) but not (100) surfaces of Ag and Cu, and the opposite trend for Au. Predictions are consistent with low-temperature STM experiments.
Dodecagonal quasicrystal silicene: preparation, mechanical property, and friction behaviour
Authors: Qian Chen , Wang Jiugen
Published: November 2019

Reduced friction on dodecagonal silicene compared to honeycomb silicene is predicted and explained by molecular dynamics (MD) simulation.
Influence of residual water and cation acidity on the ionic transport mechanism in proton-conducting ionic liquids
Authors: Lin Jingjing , Wang Liming , Zinkevich Tatiana , Indris Sylvio , Suo Yanpeng , Korte Carsten
Published: November 2019

There will be a transition between vehicular and cooperative transport mechanisms in highly acidic proton conducting ionic liquids.
Enhanced anisotropic electrical conductivity of perturbed monolayer β12-borophene
Authors: Khoa Doan Quoc , Hieu Nguyen N. , Hoi Bui Dinh
Published: November 2019

β12-Borophene is a perfect planar nanolattice comprised of massless Dirac fermions and massless/massive triplet fermions considering the inversion symmetry lattice model.
PtNixCoyconcave nanocubes: synthesis and application in photocatalytic hydrogen generation
Authors: Jia Xinjia , Liu Shuang , Huang Li , Devaraji Perumal , Walekar Laxman , Chen Wei , Li Xiying , Liu Shanhu , Mao Liqun
Published: November 2019

PtNixCoyalloy concave nanocubes coupled with CdS nanorods were applied in the H2evolution reaction under visible light irradiation.
Predicting aggregation energy for single atom bimetallic catalysts on clean and O* adsorbed surfaces through machine learning models
Authors: Lu Zhuole , Yadav Shwetank , Singh Chandra Veer
Published: November 2019

Machine learning models are successfully developed for simultaneous prediction of stability and adsorption energy at single-atom bimetallic sites.
Design, synthesis, characterization of peripherally tetra-pyridine-triazole-substituted phthalocyanines and their inhibitory effects on cholinesterases (AChE/BChE) and carbonic anhydrases (hCA I, II and IX)
Authors: Arslan Tayfun , Buğrahan Ceylan M. , Baş Hüseyin , Biyiklioglu Zekeriya , Senturk Murat
Published: November 2019

In this study, phthalocyanine precursors (5and9) and 1,2,3-triazole-substituted metal-free and metallo phthalocyanines (9a–c) were designed and synthesized for the first time and evaluatedin vitrofor key molecular targets.
Half-sandwich rare-earth metal complexes bearing a C5Me4-C6H4-o-CH2NMe2 ligand: synthesis, characterization and catalytic properties for isoprene, 1-hexene and MMA polymerization
Authors: Song Tingting , Liu Ning , Tong Xiaobo , Li Feng , Mu Xiaoyue , Mu Ying
Published: November 2019

New rare-earth metal complexes bearing the ligand C5Me4-C6H4-o-CH2NMe2 were synthesized and studied as precatalysts for isoprene, 1-hexene and MMA polymerization.
Revealing electrolyte oxidation via carbonate dehydrogenation on Ni-based oxides in Li-ion batteries by in situ Fourier transform infrared spectroscopy
Authors: Zhang Yirui , Katayama Yu , Tatara Ryoichi , Giordano Livia , Yu Yang , Fraggedakis Dimitrios , Sun Jame Guangwen , Maglia Filippo , Jung Roland , Bazant Martin Z. , Shao-Horn Yang
Published: November 2019

Carbonate oxidation via dehydrogenation on LiNi0.8Co0.1Mn0.1O2 at voltages as low as 3.8 VLi was revealed by in situ FT-IR measurements.
The philosophy of carbon: meso-entropy materials
Authors: Feng Boxu , Zhuang Xiaodong
Published: November 2019

The meso-entropy concept is proposed to re-understand the material world and to develop new carbon-rich materials.
Synthesis and characterization of a novel 18F-labeled 2,5-diarylnicotinamide derivative targeting orexin 2 receptor
Authors: Watanabe Hiroyuki , Matsushita Naoki , Shimizu Yoichi , Iikuni Shimpei , Nakamoto Yuji , Togashi Kaori , Ono Masahiro
Published: November 2019

A novel 18F labeled probe ([18F]DAN-1) selectively bound to orexin 2 receptor (OX2R) and displayed moderate uptake into the mouse brain.
Design, synthesis, characterization and evaluation of the anticancer activity of water-soluble half-sandwich ruthenium(ii) arene halido complexes
Authors: Khan Tanveer A. , Bhar Kishalay , Thirumoorthi Ramalingam , Roy Tapta Kanchan , Sharma Anuj K.
Published: November 2019

Synthesis, crystal structure determination, DFT studies, experimental and theoretical evaluation of DNA/BSA interactions and cytotoxicity studies of three piano-stool Ru(ii)(p-cymene)chloride complexes (1–3) are presented herein.
Development of novel therapeutics for glaucoma filtration surgery based on transforming growth factor-β receptor 1 inhibition
Authors: Zivkovic Maja , Zlatanovic Marko , Zlatanovic Nevena , Golubović Mladjan , Veselinović Aleksandar M.
Published: November 2019

QSAR modeling with computer-aided drug design was used for the in silico development of novel therapeutics for glaucoma filtration surgery.
Selective bilirubin sensor fabrication based on doped IAO nanorods for environmental remediation
Authors: Rahman Mohammed M. , Ahmed Jahir , Asiri Abdullah M.
Published: November 2019

In this approach, low-dimensional facile IAO nanorods were prepared by using the hydrothermal technique, which is efficiently applied to develop a non-enzymatic sensor coated with GCE probe by electrochemical reduction method.
Multifunctional inorganic nanomaterials for energy applications
Authors: Wang Huilin , Liang Xitong , Wang Jiutian , Jiao Shengjian , Xue Dongfeng
Published: November 2019

Multifunctional inorganic nanomaterials have been attracting increasing attention for various energy applications, such as energy generation, conversion, storage, saving and transmission.
Synthesis of octahedral Pt–Ni–Ir yolk–shell nanoparticles and their catalysis in oxygen reduction and methanol oxidization under both acidic and alkaline conditions
Authors: Yang Tao , Wang Yihui , Wei Wenxian , Ding Xinran , He Maoshuai , Yu Tingting , Zhao Hong , Zhang Dongen
Published: November 2019

A Pt–Ni–Ir yolk–shell catalyst was synthesized using facile processes and displayed superior catalytic activity for oxygen reduction and methanol oxidization.
Gold nanocage-based surface-enhanced Raman scattering probes for long-term monitoring of intracellular microRNA during bone marrow stem cell differentiation
Authors: Cao Xiaowei , Wang Zhenyu , Bi Liyan , Bi Caili , Du Qiu
Published: November 2019

In this study, a hairpin DNA (hpDNA)-conjugated gold nanocages (GNCs) SERS probe was developed for the long-term detection and imaging of miR-144-3p in osteogenic differentiation of bone marrow stem cells.
Writing chemical patterns using electrospun fibers as nanoscale inkpots for directed assembly of colloidal nanocrystals
Authors: Kiremitler N. Burak , Torun Ilker , Altintas Yemliha , Patarroyo Javier , Demir Hilmi Volkan , Puntes Victor F. , Mutlugun Evren , Onses M. Serdar
Published: November 2019

Applications that range from electronics to biotechnology will greatly benefit from low-cost, scalable and multiplex fabrication of spatially defined arrays of colloidal inorganic nanocrystals.
Amplified light harvesting for enhancing Italian lettuce photosynthesis using water soluble silicon quantum dots as artificial antennas
Authors: Li Yanjuan , Li Wei , Zhang Haoran , Liu Yingliang , Ma Li , Lei Bingfu
Published: November 2019

Amplified light harvesting for enhancing Italian lettuce photosynthesis using silicon quantum dots.
Metal-free highly efficient photocatalysts for overall water splitting: C3N5 multilayers
Authors: Qi Siyun , Fan Yingcai , Wang Junru , Song Xiaohan , Li Weifeng , Zhao Mingwen
Published: November 2019

We demonstrated from first-principles the C3N5 multilayers as high-efficient photocatalysts for overall water splitting. The redox ability of the photogenerated carriers is high enough to drive HER and OER without using sacrificial reagents.
Self-templated synthesis of Co3O4 hierarchical nanosheets from a metal–organic framework for efficient visible-light photocatalytic CO2 reduction
Authors: Ren Jia-Tong , Zheng Ya-Li , Yuan Kun , Zhou Liang , Wu Ke , Zhang Ya-Wen
Published: November 2019

Co3O4 hierarchical nanosheets were synthesized by a self-templated strategy and showed excellent performance towards visible-light photocatalytic CO2 reduction to CO.
A one-pot route for the synthesis of Au@Pd/PMo12/rGO as a dual functional electrocatalyst for ethanol electro-oxidation and hydrogen evolution reaction
Authors: Ahmadpour Ali , Khadempir Sara , Ashraf Narges , Mitchell Scott G. , Ahangari Mahdi H.
Published: November 2019

Au@Pd/PMo12/rGO nanocomposite was synthesized and used as a dual-functional electrocatalyst for HER and EOR.
Unravelling the mechanism of cobalt-catalysed remote C–H nitration of 8-aminoquinolinamides and expansion of substrate scope towards 1-naphthylpicolinamide
Authors: Chu Melody , Planas Oriol , Company Anna , Ribas Xavi , Hamilton Alex , Whiteoak Christopher J.
Published: November 2019

Computational studies of the Co-catalyzed remote nitration of 8-aminoquinolinamides have found the mechanism to operate through an unexpected high-spin induced remote radical-coupling.
Increasing efficiency of perovskite solar cells using low concentrating photovoltaic systems
Authors: Baig Hasan , Kanda Hiroyuki , Asiri Abdullah M. , Nazeeruddin Mohammad Khaja , Mallick Tapas
Published: November 2019

Perovskite solar cell (PSC) technology is the flag bearer for the future of photovoltaics allowing unlimited possibilities for its application.
IGF1R undergoes active and directed centripetal transport on filopodia upon receptor activation
Authors: Krndija Denis , Fairhead Michael
Published: November 2019

Filopodia are thin, actin-based membrane protrusions with roles in sensing external mechanical and chemical cues, such as growth factor gradients in tissues. It was proposed that the chemical sensing role of filopodia is achieved through clearance of activated signaling receptors from filopodia. Type I insulin-like growth factor receptor (IGF1R) is a key regulator of normal development and growth, as well as tumor development and progression. Its biological roles depend on its activation upon IGF1 binding at the cell membrane. IGF1R behavior at the cell membrane and in particular in filopodia, has not been established. We found that IGF1 activation led to a gradual reduction in IGF1R puncta in filopodia, and that this clearance depended on actin, non-muscle myosin II, and IGF1R kinase activity. Using single particle tracking of filopodial IGF1R, we established that ligand-free IGF1R undergoes non-directional unidimensional diffusion along the filopodium. Moreover, after initial diffusion, the ligand-bound IGF1R is actively transported along the filopodium towards the filopodium base, and consequently cleared from the filopodium. Our results show that IGF1R can move directionally on the plasma membrane protrusions, supporting a sensory role for filopodia in interpreting local IGF1 gradients.
The Effect of Talker and Listener Depressive Symptoms on Speech Intelligibility
Authors: Yi Hoyoung , Smiljanic Rajka , Chandrasekaran Bharath
Published: November 2019

Purpose

This study examined the effect of depressive symptoms on production and perception of conversational and clear speech (CS) sentences.

Method

Five talkers each with high-depressive (HD) and low-depressive (LD) symptoms read sentences in conversational and clear speaking style. Acoustic measures of speaking rate, mean fundamental frequency (F0; Hz), F0 range (Hz), and energy in the 1–3 kHz range (dB) were obtained. Thirty-two young adult participants (15 HD, 16 LD) heard these conversational and clear sentences mixed with energetic masking (speech-shaped noise) at −5 dB SPL signal-to-noise ratio. Another group of 39 young adult participants (18 HD, 19 LD) heard the same sentences mixed with informational masking (one-talker competing speech) at −12 dB SPL signal-to-noise ratio. The key word correct score was obtained.

Results

CS was characterized by a decreased speaking rate, increased F0 mean and range, and increased energy in the 1–3 kHz range. Talkers with HD symptoms produced these modifications significantly less compared to talkers with LD symptoms. When listening to speech in energetic masking (speech-shaped noise), listeners with both HD and LD symptoms benefited less from the CS produced by HD talkers. Listeners with HD symptoms performed significantly worse than listeners with LD symptoms when listening to speech in informational masking (one-talker competing speech).

Conclusions

Results provide evidence that depressive symptoms impact intelligibility and have the potential to aid in clinical decision making for individuals with depression.
Clusters and mirages: cataloguing stellar aggregates in the Milky Way
Authors: Cantat-Gaudin T. , Anders F.
Published: November 2019

Context. Many of the open clusters listed in modern catalogues were initially reported by visual astronomers as apparent overdensities of bright stars. As observational techniques and analysis methods continue to improve, some of them have been shown to be chance alignments of stars and not true clusters. Recent publications making use of Gaia DR2 data have provided membership lists for over a thousand clusters, however, many nearby objects listed in the literature have so far evaded detection.

Aims. We aim to update the Gaia DR2 cluster census by performing membership determinations for known clusters that had been missed by previous studies and for recently-discovered clusters. We investigate a sub-set of non-detected clusters that, according to their literature parameters, should be easily visible in Gaia. Confirming or disproving the existence of old, inner-disc, high-altitude clusters is especially important as their survival or disruption is linked to the dynamical processes that drive the evolution of the Milky Way.

Methods. We employed the Gaia DR2 catalogue and a membership assignment procedure, as well as visual inspections of spatial, proper motion, and parallax distributions. We used membership lists provided by other authors when available.

Results. We derived membership lists for 150 objects, including ten that were already known prior to Gaia. We compiled a final list of members for 1481 clusters. Among the objects that we are still unable to identify with the Gaia data, we argue that many (mostly putatively old, relatively nearby, high-altitude objects) are not true clusters.

Conclusions. At present, the only confirmed cluster located further than 500 pc away from the Galactic plane within the Solar circle is NGC 6791. It is likely that the objects discussed in this study only represent a fraction of the non-physical groupings erroneously listed in the catalogues as genuine open clusters and that those lists need further cleaning.
Comparison of counterstreaming suprathermal electron signatures of ICMEs with and without magnetic cloud: are all ICMEs flux ropes?
Authors: Wang Jiemin , Zhao Yan , Feng Hengqiang , Liu Qiang , Tian Zhanjun , Li Hongbo , Zhao Ake , Zhao Guoqing
Published: November 2019

Context. Magnetic clouds (MCs), as in large-scale interplanetary magnetic flux ropes, are usually still connected to the Sun at both ends near 1 AU. Many researchers believe that all nonMC interplanetary coronal mass ejections (ICMEs) also have magnetic flux rope structures, which are inconspicuous because the observing spacecraft crosses the flanks of the rope structures. If so, the field lines of nonMC ICMEs should also usually be connected to the Sun at both ends.

Aims. We want to know whether or not the field lines of most nonMC ICMEs are still connected to the Sun at both ends.

Methods. This study examined the counterstreaming suprathermal electron (CSE) signatures of 272 ICMEs observed by the Advanced Composition Explorer (ACE) spacecraft from 1998 to 2008 and compared the CSE signatures of MCs and nonMC ICMEs.

Results. Results show that only 10 of the 101 MC events (9.9% ) and 75 of the 171 nonMC events (43.9%) have no CSEs. Moreover, 21 of the nonMC ICMEs have high CSE percentages (more than 70%) and show relatively stable magnetic field components with slight rotations, which are in line with the expectations that the observing spacecraft passes through the flank of magnetic flux ropes. Therefore, the 21 events may be magnetic flux ropes but the ACE spacecraft passes through their flanks of magnetic flux ropes.

Conclusions. Considering that most other nonMC events have disordered magnetic fields, we suggest that some nonMC ICMEs inherently have disordered magnetic fields, and therefore no magnetic flux rope structures.
Improving the quality of production of gears in terms of errors in the profile of teeth in gear milling operations
Authors: Safarov Damir , Kondrashov Alexey
Published: November 2019

The article describes the scheme for continual improvement of manufacturing quality spur gears in terms of error profiles of the side surfaces of gear teeth. The technique is universal and applicable to any operations of gear processing. The practical application of the technique is considered by the example of gear milling with a worm gear cutter. The errors of profile include metrological indicators of total error profile, the error direction and error of form profile. The scheme of analysis of the data consists of several steps – evaluation of indicators relative to the limit values, identification of the technological structure of the profile errors and expert analysis of the profile profilograms. The final expert analysis of profilograms allows to reveal the most probable operating negative technological factors leading to deviations of a profile from nominal position. The advantage of the quality improvement scheme is its high efficiency and effectiveness in comparison with traditional methods of statistical quality management, since it does not require the collection of significant amounts of statistical information.
A research on magnetic properties of magnetic nanodispersed lubricants
Authors: Bolotov Alexander , Novikov Vladislav , Novikova Olga
Published: November 2019

The paper presents the results of theoretical and experimental studies of the magnetic properties of magnetic lubricating oils. It shows oil magnetization curves in the initial state and after tests in the boundary friction mode. Oil properties were measured by an original magnetometer with Hall sensors. It has been established that triboeffects change oil composition and structure and decrease its magnetization. The results will help determine the optimal operating conditions of magnetic oils while maintaining their magnetic and lubricating properties.
Aerodynamic streams at cylindrical internal grinding by the textured wheels
Authors: Gusev Vladimir
Published: November 2019

During internal grinding a large amount of heat is formed. A heat has a negative impact on all processing indicators. The speed of heat removal from the processed workpiece is defined not only by structure of grinding wheel and by giving method of lubricant cooling liquid (LCL), but also by the aerodynamic streams, which are formed by a tool rotation. Aerodynamics of traditional grinding wheels is studied in detail, but for textured wheels to aerodynamic streams did not pay of due attention. The multiple-factor experiment is executed and models of movement speed of the aerodynamic streams are determined. It is established, that the greatest influence on the movement speed of the air flows has an axial distance of a measurement point from an end face of abrasive segments and a radial distance of this point from the cutting surface. Static pressure of air in an internal wheel’s cavity is equal 47 Pas, and outside of the wheel in close proximity to the cutting surface – 212 Pas. Taking into account the received experimental data of the movement speeds of aerodynamic streams and different data of air pressure in the specified areas, possible methods of giving of LCL in a cutting zone are analysed. It is established, that the most effective is the centrifugal method of giving of LCL to an internal cavity of the textured tool.
Mechanical behavior and fractographic analysis of a TiNi alloy with various thermomechanical treatment
Authors: Churakova Anna , Yudahina Anna , Kayumova Elina , Tolstov Nikita
Published: November 2019

Influence of thermomechanical treatment (deformation, thermal cycling treatment in the temperature range of martensitic transformations B2-B19’) on the TiNi alloys’ mechanical behaviour and fracture was studied. Different states were considered, they are initial coarse-grained (CG), ultrafine-grained (UFG) after ECAP (with a grain size of 200 nm), the state after ECAP and cold upsetting by 30% - UFG state with high dislocation density. It was shown that thermal cycling causes some increase in dislocation density, strength and microhardness in all the states. Thermal cycling of UFG alloys allows forming the states with non-equilibrium grain boundaries, with additional dislocations of “phase hardening”. The nature of the fracture was analysed in the TiNi alloy in various states.
Distribution of enterprise management resources based on parameters of a surge in demand for product
Authors: Akhmedyanova Gulnara , Pishchukhin Alexandr
Published: November 2019

All social and economic processes are characterized by the presence of a large number of low frequencies in the spectrum of the parameters describing them. In this case, it becomes possible to consider individual surges of a random process, which will be characterized by phase, average value and duration. According to these indicators, it is possible to prepare the enterprise for the production of precisely those products for which there is a surge in demand in the near future. It is accepted that the probability of a surge in demand for this type of product after a given time is a Markov nature and is described by the Kolmogorov equation. The overall probability of technology readiness can be defined as the product of the partial readiness probabilities in phase, duration and average amplitude, considering them to be independent events. The unavailability of technology decreases after each dosed management exposure. As a result, a methodology has been developed for the optimal distribution of control resources, which makes it possible to increase the availability of technology by more than a third compared to their equal distribution.
Processing of the edges of the parts on the robot complex
Authors: Podashev Dmitriy , Dimov Yuriy
Published: November 2019

In some fields of industry (especially in aircraft- and helicopter buildings) high requirements are made to the quality of the processed parts surfaces on the final operations. At the same time many operations (surface conditioning, edge cutting, radiussing etc) are done manually with expenditure of sufficient manpower. That’s why problem of mechanization and automatizaton of such final operations for these industries is very acute.
Thermal power treatment of step shafts
Authors: Bobrowskii Alexander V. , Drachev Oleg I. , Turbin Igor V. , Epishkin Vyacheslav E.
Published: November 2019

This article reviews the design of thermal power units for performing thermal operations of hardening and tempering of non-rigid parts of the “shaft” type. The authors describe the thermal power treatment technology, the residual deformation analysis and the optimal conditions definition. The units operation principles and algorithms are given. The developed technology and the design of the frame for thermal operations make it possible to maintain accuracy throughout the term of the product use.
Application of the complex parameter of strength and ductility to assess the state of the blades’ material at different periods of operation
Authors: Tsareva Irina , Berdnik Olga
Published: November 2019

The paper is devoted to the study of the material’s condition of guide blades made of heat-resistant nickel alloy with different operating time. It is established that the structure of the blade material and their mechanical properties are not satisfactory for further operation. To recovery the performance properties and structure of the blade material, several types of heat treatment were tested and the optimal one was chosen. The complex parameter of strength and plasticity is calculated and on its basis the estimation of degree of recovery of blade’ material after heat treatment is carried out.
X-ray diffraction analysis of products sintered from isostatically pressed leaded bronze powders
Authors: Ageev Evgeny , Pereverzev Anton
Published: November 2019

This article presents a study of the phase composition of samples sintered from isostatically pressed leaded bronze electroerosion powders obtained in distilled water. It is identified that the main phases in the sintered sample are Cu, Zn2SnO4, Pb(Cu2O2), PbO, Fe3O4.
Formation of recommendations for the selection of types of connections for different types of crossroads based on the generalized imitation model
Authors: Novikov Aleksandr , Eremin Sergey , Kulev Andrei
Published: November 2019

The paper deals with the issues of the transport network imitation modeling. Preliminary the authors analyzed the main modeling systems, which include Aimsun, MATSim, Anylogic, PTV VISUM and others. All these instrumental tools have the ability to form an arbitrary structure of the transport network. The research showed, however, for the small sections of the street road network (SRN), such as the crossroad, the Anylogic system is more efficient and makes it possible to parameterize the model, which can be used to model various structures of the crossroad. In this regard, the paper proposes a generalized model of the crossroad and, based on its modeling, gives recommendations for choosing the type of crossroads at different intensities of traffic flows.
Development of heat treatment modes for a two-phase titanium alloy to form regulated structure and properties complex
Authors: Skvortsova Svetlana , Gurtovaya Galina , Afonina Maria , Ruchina Natalya , Zaynetdinova Gulnara
Published: November 2019

The article shows the possibility of creating structure of the same type and, accordingly, a close level of properties in hot-rolled semi-finished products of the VST2K alloy with different chemical composition by means of heat treatment.
Study of the properties of metal powder received by plasma
Authors: Gabdrakhmanov Azat , Shafigullin Lenar , Gabdrakhmanova Tansylu , Galiakbarov Azat
Published: November 2019

In this work, a new method for producing metal and ceramic powders by plasma spraying of rod blanks is proposed. A distinctive feature of this method is the use of a direct-acting plasmatron, where a bar-stock acts as one of the electrodes, and the cooling of the molten particles occurs place with a water screen. The water screen is not only in the lower part of the installation, but also it flows evenly from the walls, which gives a more efficient cooling of all molten particles, forming a regular spherical shape, and plasma flow. Water constantly circulates in a closed circuit, the heat is removed in a heat exchanger. Studies of powders were performed on scanning electron microscope “VEGA 3 LMH” produced by the company TESCAN, the Czech Republic, with the help of x-ray energy dispersive microanalysis AZtecEnergy Advanced busatti detector X-max 20 Standart, production company Oхford Instruments. The microhardness of the particles was measured according to GOST R ISO 6507-1-2007 on a MicroMet 5104 microhardness meter, with a load of 100 gs.
Application of simulation methods to optimize the composition of technological complexes of machines
Authors: Novichenko Anton , Kononenko Aleksandr
Published: November 2019

The paper proposes a method for determining the optimal parameters of technological systems in environmental management, based on the principles of automated support for organizational decision-making during the formation of production structures and effective technological complexes of machines. The technique is based on simulation modeling of various options for the implementation of the process using a multi-agent approach
Effect of Al-Y-Ce-La master alloy on structure formation, liquation processes and properties of AK7ch silumine (AL9)
Authors: Ri Ernst Kh. , Ri Khosen , Goncharov Aleksei V.
Published: November 2019

The regularities of changes in the composition and properties (micro- and nanohardness, HB hardness) of the structural components - α-solid solution and eutectic components of the AK7ch alloy (AL9) depending on the value of the addition of Al-Y-Ce-La master alloy are established. With an increase in the addition of Al-Y-Ce-La master alloy a sharp change is observed in the composition and properties of the structural components of the AK7ch alloy - α-solid solution Si in aluminum and eutectic α + Si, as well as complex-doped aluminides from Si, Fe and rear earth metals (REM). The structural components of the AK7ch alloy are identified with the addition of an increasing amount of Al-Y-Ce-La master alloy (α-solid solution of Si in aluminum, eutectic α+Si, complex-doped aluminides of rare-earth metals of variable composition AlxSiyREMz and AlxSiyFezREMν). A correlation between the solubility of silicon in α-solid solution and its microhardness is found. To increase microhardness of the eutectic and hardness of the AK7ch alloy, it is necessary to add the synthesized ligature in the amount of 0.1 wt.%.
Technology of obtaining REM-containing master alloy for silumins modification
Authors: Ri Ernst Kh. , Ri Khosen , Ermakov Mikhail A.
Published: November 2019

The technology of producing ligatures containing rear earth metals (REM) for modification of silumins has been developed. The optimum content ratio of yttrium, cerium and lanthanum 2: 1: 0.5 (15-20 wt.% Y, 7-10 wt.% Ce, 3.5-5.0 wt.% La) for the synthesis of REM aluminides has been established. The peculiarities of the REM aluminides synthesis is studied using the methods of optical and electron microscopy and X-ray microanalysis, followed by the identification of the structural components of the Al-REM alloy. The microstructure of the master alloy is proved to consists of: REM aluminides (yttrium-containing and cerium-containing), metal base (Al), Al eutectic + REM aluminide and α + Si.
Practical implementation of a computer simulator complex for training mining excavator
Authors: Velikanov Vladimir , Dyorina Natalja , Yuzhakova Julia , Panfilova Olga
Published: November 2019

The work considers the basic principles of building simulators and training systems. The authors develop the architecture of a computer simulator - modeling complex for training mining excavator drivers. The paper describes the main tasks of the simulator complex. The complex tasks include the excavator operator’s preparation for the adequate information perception and timely response to the management process of a complex technical system (excavator), as well as development of the relationships set defining the system of necessary criteria to judge the quality of training.
Multi-criteria security assessment of control and diagnostic data on the technological processes
Authors: Kotenko Igor , Parashchuk Igor
Published: November 2019

A mathematical model of the dynamics of changes in the state of security indicators of control and diagnostic data on the technological process is proposed. It is constructed using Markov chains and takes into account the probabilistic-temporal mechanism for changing the state of data protection indicators of this class. Based on this model, a methodological approach has been developed for multi-criteria assessment of the security of control and diagnostic data on the technological process. The approach is based on the analysis of current deviations of the values of data protection indicators from the requirements for them, takes into account and eliminates the uncertainty of the initial diagnostic information. The proposed methodological approach also allows one to take into account transients that affect security when introducing control over the structure, parameters and modes of collection and processing of control and diagnostic data about the technological process in various conditions.
Method for determining of the coatings thermophysical properties formed by the microarc oxidation
Authors: Dudareva Natalya , Gallyamova Rida , Kruglov Alexander
Published: November 2019

In this work are determined the thermophysical parameters (coefficient of thermal conductivity, thermal diffusivity and heat capacity) of a coating formed by the microarc oxidation (MAO) method on an aluminum alloy AK12D. A method for determining the thermal properties of the MAO layers was developed and verified. The technique is based on measuring the thermal conductivity of the layer by pulsed laser heating and calculating its heat capacity and density based on the data of layer-by-layer phase analysis taking into account the volume porosity. The method allows to calculate the thermophysical parameters whose values differ from the experimental no more than 2.2% in thermal conductivity and no more than 7.0% for heat capacity. In accordance with the proposed method, it was found that the MAO layer on AK12D alloy has a low thermal conductivity of ~ 1.57 W/(m·K) at 100 °C.
Assessment of the level of influence of weather conditions on the mode of operation of the regulated intersection
Authors: Shevtsova Anastasia , Kravchenko Andrey , Vasilyeva Victoria
Published: November 2019

This article analyses the influence of weather conditions on the mode of operation of a regulated intersection. As a result of the analysis of regulatory and scientific sources, the authors established a connection between the temperature conditions of the environment and the movement of vehicles in the area of a regulated intersection. The established dependence on the result of the experiment allows us to optimize the traffic light control cycle and coordination programs depending on temperature differences, which allows more efficient control of traffic flows in the area of the regulated intersection.
Mathematical models and methods of prolongation of operating lifetimes for expensive objects
Authors: Trukhanov Vladimir , Kukhtik Mikhail , Fyodorova Natal’ya
Published: November 2019

The article is devoted to the relevant issue of prolongation of operating lifetimes for expensive objects. The methods of prolongation of operating lifetimes for complex technical systems have been described. In particular, the mathematical model of prolongation of operating lifetimes by the calculation and analytical method, which is based on normal distribution law of actual load and durability, has been represented. The experimental method, which is based on analysis of actual technical state of element base and material, has been described. The probabilistic method of calculation of reliability function during prolonged operating lifetime taking into account actual technical state of element base has been represented.
Big data analytics of the technological equipment based on Data Lake architecture
Authors: Kovalev Ilya , Nezhmetdinov Ramil , Kvashnin Denis
Published: November 2019

Currently, more and more managers of medium and large industrial companies are thinking about conducting a digital transformation of their enterprise. Each company is forced to strive to find an approach to optimizing production in order to remain competitive in the market. For industrial enterprises, this approach may be a digital transformation using the ideas of Industry 4.0. The digital transformation of an enterprise is a complex and multifaceted process that affects almost all levels of production. At the head of this whole process are data. Data on the work of production must be collected, stored, aggregated, transferred to various levels. Existing methods for storing data are not always suitable for working with BigData, new solutions are needed. The paper shows a comparison of the traditional approach to data aggregation and a promising direction based on the architecture of Data Lake.
Heat exchange of a roller with a particle from polymeric material when it is pressed into tissue
Authors: Fedyaev Vladimir , Khaliulin Valentin , Faskhutdinov Marat , Belyaev Alexey , Sirotkina Liliya
Published: November 2019

We study the heat transfer of polymer particles with a roller that presses the material of the particles into the fabric. Provided that the speed of movement of the tissue with the particles relative to the roller is small, the heat exchange of the pressed particles with the environment is not taken into account, a mathematical model of conductive heat transfer in the contacting roller, polymer particle and reinforcing fabric is proposed. This model includes heat conservation equations written with respect to average temperatures of the roller, particles, fabric, as well as boundary and initial conditions. Assuming that there is perfect thermal contact between the polymer particles and the fabric, in the direction of heat propagation the average thickness of the pressed tissue particle is small, the layer of material of particles and fabric is considered thermally thin, the temperature in it varies slightly in thickness. As a result, the initial system of three equations is reduced to one equation with respect to the temperature of the roller, which is supplemented by the corresponding boundary and initial conditions. In the case when the temperature along the radius of the roller varies along its radius linearly, the specific heat flux on the surface of the roller is estimated. After that, this expression is substituted into the heat balance equation of a thermally thin layer consisting of particle material and tissue, which is integrated after certain transformations.
Influence of the form of axisymmetric load on the stress-strain state of an elastoplastic half-space
Authors: Ogar Peter , Gorokhov Denis , Mamaev Leonid , Kushnarev Vladislav
Published: November 2019

The problems of elastic sinking of materials and elastic restoration of an imprint under loading of an elastic-plastic half-space with an axisymmetric load of the form,P(r)=P0(1-r2/a2)β where 0<β<0.5 are considered. Expressions are obtained that describing the stress-strain state of an elastoplastic half-space. The conditions of the onset of plastic deformation in the near-surface layer and on the half-space of surface are considered depending on the parameter β.
The mathematical models for cutting force calculation during structural and corrosion-resistant steels` parts processing
Authors: Zhdanov Alexey A. , Kursin Oleg A. , Bach Pham Xuan
Published: November 2019

The paper shows that conventional mathematical models for calculating the cutting force components during the turning process, represented in reference guides on engineering, give drastic errors reaching 100 percent or more for various tool-workpiece couples. These errors interfere with applying reference values of the cutting force for any further calculations, equipment selection, workpiece positioning scheme, workpiece deformation value due to the elastic of the technological system elements during processing and etc., because of the insufficient reliability of the results of such calculations. The paper proposes mathematical models obtained as a result of experimental studies, which allow for increasing the accuracy of the calculation of the components of the cutting force by introducing an additional parameter – i.e., the value of thermo EMF of the test running into the calculation formulas. This approach enables to reduce the error in the calculation of the components of the cutting force up to ± 15%. In addition, the need for the development of specific mathematical models for various groups of materials machined is shown, which is due to the peculiarities of contact processes in the machining of various groups of steels, as well as to qualitative and quantitative indicators of the thermo-physical properties of the materials of tool-workpiece contact couples.
Influence of electro-acoustic coating of metals on ordering of dislocating structures
Authors: Kochetov Andrei , Fisunova Elena , Lavrenova Tatyana , Baryshnikova Olga
Published: November 2019

Method of electroacoustic spraying allows getting ordering of material remote structures by complex energy interaction and ultrasound field. Complex interaction influences on strengthening surface is leading to a thin film formation, which gives a strong base for the basic material by formation of forecasting structural phase contain for getting protective wear-resistant films and also thanks to interaction forces between a film and a particle location.
Determining the level of structural survivability to control the reliability of innovative economic systems
Authors: Ponikarova Anna , Zotov Maksim , Ponikarova Irina
Published: November 2019

Currently, the development of modern economic systems takes place in a continuous increase in the requirements for the quality and reliability of their innovative functions. This creates the need to search for new sources of their increase in the course of innovative development of companies. In this paper, the study of existing approaches to assessing the reliability of the development of innovative economic systems based on determining the level of their structural survivability. It is noted that the achievement of reliability of innovative development of the organization is provided by choosing the most effective project, taking into account the internal capabilities of the company and the degree of influence of environmental factors on it. The choice is based on the mechanism of determining the impact of the level of structural survivability on the effectiveness of projects with different innovation orientation. The results of the study on the example of petrochemical enterprises showed that in the current conditions of development, the impact on the personnel component of the production potential of the company will give the greatest effect to achieve the reliability of the development of innovative economic systems.
Developing processes for manufacturing metal aviation technology components using powder bed fusion methods
Authors: Filatova Anastasia , Tarasova Tatiana , Peretyagin Pavel
Published: November 2019

Favorable parameters for selective melting methods using electron and laser radiation have been established to obtain the required geometric, physical and mechanical characteristics of thin-walled parts for aviation purposes from H18N9T (analogue AISI 321) and Ti6Al4V alloys. Parts were manufactured and field tests were carried out on the stand. It has been shown that the technological processes developed using the SLM and SEBM methods can be recommended for the manufacture of thin-walled parts working in conditions of rapidly changing deformations.
Mathematical model for controlling CO2 concentration in greenhouses late in MATLAB
Authors: Ivliev Sergey N. , Alekseev Evgeniy G. , Shikov Stanislav A. , Volkov Anton V.
Published: November 2019

The article is devoted to the development of an automated control system for irradiation facilities. The system will optimize the electricity cost for supplementary lighting plants in greenhouses without economic losses. A number of scientific researches studying chlorophyll, photosynthesis and processes in the green plant leaf were analyzed as the theoretical base for the present article. On their basis, a schematic structure of the photosynthetic apparatus of plants was developed and kinetic differential equations describing the structure and functioning of the photosynthetic chlorophyll apparatus of green plants were derived. The obtained mathematical expressions describe the changes in the concentrations of the base materials that participate in the formation of the photosynthetic apparatus structure and the accumulation of photosynthesis products and allow effective controlling of the irradiation process of plants. It has been achieved by adjusting the parameters of the illumination interval and the illumination area with the aid changing the number of switched on and off sources of optical radiation and changing the spectral component in a narrow limit.
Identification of structural defects in composite materials by the thermal imaging non-destructive testing method
Authors: Kokurov Andrey , Odintsev Igor , Chichigin Boris , Subbotin Dmitry
Published: November 2019

The article discusses the practical aspects of applying the thermal imaging non-destructive testing method of layered polymer composites. The specific purpose of the work is to demonstrate the possibilities of detecting in material and geometric identification of initial defects such as debonding.
Okkam - advanced morphological approach as method for computer aided innovation (CAI)
Authors: Rakov Dmitry
Published: November 2019

This paper presents the use of Advanced Morphological Approach based for analysis, generation and synthesis of new engineering solutions as part CAI (computer-aided innovation). CAI is developing as a response to the higher demands of science and industry to the innovative level of new products. The developed approach and a software Okkam is to create a sequence of operations, comparison and selection of rational variants set by means of a series of successive procedures. The specifics of structural synthesis consist of the discreteness of variables, the presence of conditionally logical limitations and the need to work with multiple conflicting criteria. Key objective is to find a solution space with the potential to fulfil the top level engineering systems requirements. Usage of cluster analysis, set theory, set of rules allows to identify the clusters of innovative systems combining high performance potential with robustness regarding requirement changes and design uncertainties. Implementation of the approach is demonstrated by the example of the analysis and synthesis of communications devices. These studies verify the weighty potential of the pro-posed approach compared to present methods.
Device for preliminary deformation of corncobs when harvesting corn for grain
Authors: Papusha Sergey K. , Papusha Vladimir K. , Nikitenko Nikolay A.
Published: November 2019

The new technology involves the use of a special device for preliminary deformation of corncobs installed in the sloping chamber of a combine harvester. Installing the present device will allow to increase the service life of a harvester, to reduce grain losses and get fuel economy in the process of corn harvesting for grain by reducing stress on a concave and as a consequence, less wear. Also, when using a special device for pre-deformation of corncobs, it is possible to reduce grain crushing during threshing.