bluuebunny/crossref_metadata_2025 huggingface dataset:
A step in the direction of resolving the paradox of Perdew-Zunger self-interaction correction
Authors: Zope Rajendra R. , Yamamoto Yoh , Diaz Carlos M. , Baruah Tunna , Peralta Juan E. , Jackson Koblar A. , Santra Biswajit , Perdew John P.
Published: December 2019

Self-interaction (SI) error, which results when exchange-correlation contributions to the total energy are approximated, limits the reliability of many density functional approximations. The Perdew-Zunger SI correction (PZSIC), when applied in conjunction with the local spin density approximation (LSDA), improves the description of many properties, but overall, this improvement is limited. Here, we propose a modification to PZSIC that uses an iso-orbital indicator to identify regions where local SICs should be applied. Using this local-scaling SIC (LSIC) approach with LSDA, we analyze predictions for a wide range of properties including, for atoms, total energies, ionization potentials, and electron affinities and, for molecules, atomization energies, dissociation energy curves, reaction energies, and reaction barrier heights. LSIC preserves the results of PZSIC-LSDA for properties where it is successful and provides dramatic improvements for many of the other properties studied. Atomization energies calculated using LSIC are better than those of the Perdew, Burke, and Ernzerhof generalized gradient approximation (GGA) and close to those obtained with the strongly constrained and appropriately normed meta-GGA. LSIC also restores the uniform gas limit for the exchange energy that is lost in PZSIC-LSDA. Further performance improvements may be obtained by an appropriate combination or modification of the local scaling factor and the particular density functional approximation.
Ultrafast dissociative ionization and large-amplitude vibrational wave packet dynamics of strong-field-ionized di-iodomethane
Authors: Wei Zhengrong , Li Jialin , Zhang Huimin , Lu Yunpeng , Yang Minghui , Loh Zhi-Heng
Published: December 2019

We employ few-cycle pulses to strong-field-ionize di-iodomethane (CH2I2) and femtosecond extreme ultraviolet (XUV) transient absorption spectroscopy to investigate the subsequent ultrafast dissociative ionization and vibrational wave packet dynamics. Probing in the spectral region of the I 4d core-level transitions, the time-resolved XUV differential absorption spectra reveal the population of several electronic states of CH2I2+ by strong-field ionization. Global analysis reveals three distinct time scales for the observed dynamics: 20 ± 2 fs, 49 ± 6 fs, and 157 ± 9 fs, ascribed to relaxation of the CH2I2+ parent ion from the Franck-Condon region, dissociation of high-lying excited states of CH2I2+ to I+ (3P2), CH2I, and I2+ (2Π3/2,g), and dissociation of CH2I2+ to I (2P3/2) and CH2I+, respectively. Oscillatory features in the time-resolved XUV differential absorption spectra point to the generation of vibrational wave packets in both the residual CH2I2 and the CH2I2+ parent ion. Analysis of the oscillation frequencies and phases reveals, in the case of neutral CH2I2, C–I symmetric stretching induced by bond softening and I–C–I bending driven by a combination of bond softening and R-selective depletion. In the case of CH2I2+, both the fundamental and first overtone frequencies of the I–C–I bending mode are observed, indicating large-amplitude I–C–I bending motion, in good agreement with results obtained from ab initio simulations of the XUV transition energy along the I–C–I bend coordinate. These results show that femtosecond XUV absorption spectroscopy is well-suited for studying ultrafast photodissociation and vibrational wave packet dynamics.
Uptake of ‘Eradicat’ feral cat baits by non-target species on Kangaroo Island
Authors: Hohnen Rosemary , Murphy Brett P. , Legge Sarah M. , Dickman Chris R. , Woinarski John C. Z.
Published: December 2019

Abstract ContextPredation by feral cats (Felis catus) threatens a range of vertebrate species across Australia, and cat-free islands increasingly act as safe havens for biodiversity. A feral cat eradication program has begun on Kangaroo Island (4405km2) in South Australia, and poison baiting is likely to be one of the main methods used. Aims Here, we trial a non-toxic version of a cat bait, ‘Eradicat’, on western Kangaroo Island, to examine its potential impact on non-target species. MethodsNon-toxic baits containing the biomarker Rhodamine B were deployed across four sites in early August and late November in 2018, with bait take and consumption assessed both by remote cameras and by the presence of Rhodamine B in mammalian whisker samples taken post-baiting. Key resultsCats encountered baits on very few occasions and took a bait on only one occasion in August (<1% of 576 baits deployed). Non-target species accounted for over 99% of identifiable bait takes. In both seasons, >60% of all baits laid was taken by either the common brushtail possum (Trichosurus vulpecula), bush rat (Rattus fuscipes) or Australian raven (Corvus coronoides). In November, Rosenberg’s goanna (Varanus rosenbergi) and southern brown bandicoot (south-eastern subspecies; Isoodon obesulus obesulus), listed nationally as Endangered, also took baits (3% and 1% respectively). The Kangaroo Island dunnart (Sminthopsis fuliginosus aitkeni), listed nationally as endangered, approached a bait on only one occasion, but did not consume it. Evidence of bait consumption was visible in the whiskers of captured common brushtail possums (100% of post-baiting captured individuals in August, 80% in November), bush rats (59% in August and 50% in November), house mice (Mus musculus) (45% in November) and western pygmy-possums (Cercartetus concinnus) (33% in November). ConclusionsAlthough feral cat baiting has the potential to significantly benefit wildlife on Kangaroo Island, impacts on non-target species (particularly the bush rat and common brushtail possum) may be high. ImplicationsAlternative cat baits, such as those containing a toxin to which native species have a higher tolerance or that are less readily consumed by native wildlife, will be more appropriate.
Homogeneous phase synthesis of chitosan silica hybrid materials in ionic liquid medium and adsorption of Fe(III) from aqueous solutions
Authors: Amarasekara Ananda S. , Wang Deping
Published: December 2019

Two chitosan silica hybrid materials were prepared by a two-step process in 78–84% yields using the homogeneous phase reaction of 3-(triethoxysilyl)propyl isocyanate with chitosan dissolved in 1-n-butyl-3-methylimidazolium chloride ionic liquid (∼10% w/w), which was
followed by NH4OH catalyzed hydrolysis of triethoxysilyl groups and then sol-gel process. These new hybrid materials were shown to adsorb up to about 95% of Fe3+ from 5 × 10−4 M aqueous solution at room temperature in 24 h.
Scientific Realism in the Wild: An Empirical Study of Seven Sciences and History and Philosophy of Science
Authors: Beebe James R. , Dellsén Finnur
Published: December 2019

We report the results of a study that investigated the views of researchers working in seven scientific disciplines and in history and philosophy of science in regard to four hypothesized dimensions of scientific realism. Among other things, we found (i) that natural scientists tended to express more strongly realist views than social scientists, (ii) that history and philosophy of science scholars tended to express more antirealist views than natural scientists, (iii) that van Fraassen’s characterization of scientific realism failed to cluster with more standard characterizations, and (iv) that those who endorsed the pessimistic induction were no more or less likely to endorse antirealism.
Metasurface cylindrical vector light generators based on nanometer holes
Authors: Lv Haoran , Lu Xiaoqing , Han Yuansheng , Mou Zhen , Zhou Changda , Wang Shuyun , Teng Shuyun
Published: December 2019

A kind of metasurface cylindrical vector light (CVL) generator in the visible region is proposed. This kind of CVL generator consists of nanometer holes etched on silver film, and it can change any linearly or circularly polarized light into the CVL in nanoscale. The order of the generated CVL is controlled by the rotation of the holes and its polarization state changes with the incident polarization condition. The base transformation theory guides is used to design the metasurface. The numerical simulations for the transmission of the proposed CVL generators confirm the validity of the theoretical predictions, and they also provide the available parameters for practical metasurface devices. The experimental results verify the performance of the proposed metasurface CVL generators. This kind of vector light generator has the advantages of thin and compact structure, polarization multiplexing and convenient manufacture. This work paves a new path for designing the miniature devices to generate the vector light field and it will promote the applications of polarization devices in optical integration and micro-manipulation.
Supersonic boundary layer transition induced by self-sustaining dual jets*
Authors: Liu Qiang , Luo Zhenbing , Deng Xiong , Liu Zhiyong , Wang Lin , Zhou Yan
Published: December 2019

To promote high-speed boundary layer transition, this paper proposes an active self-sustaining dual jets (SDJ) actuator utilizing the energy of supersonic mainflow. Employing the nanoparticle-based planar laser scattering (NPLS), supersonic flat-plate boundary layer transition induced by SDJ is experimentally investigated in an Ma-2.95 low-turbulence wind tunnel. Streamwise and spanwise NPLS images are obtained to analyze fine flow structures of the whole transition process. The results reveal the transition control mechanisms that on the one hand, the jet-induced shear layer produces unstable Kelvin–Helmholtz instabilities in the wake flow, on the other hand, the jets also generates an adverse pressure gradient in the boundary layer and induce unstable streak structures, which gradually break down into turbulence downstream. The paper provides a new method for transition control of high-speed boundary layer, and have prospect both in theory and engineering application.
Displacement damage in optocouplers induced by high energy neutrons at back-n in China Spallation Neutron Source*
Authors: Xu Rui , Wang Zu-Jun , Xue Yuan-Yuan , Ning Hao , Liu Min-Bo , Guo Xiao-Qiang , Yao Zhi-Bin , Sheng Jiang-Kun , Ma Wu-Ying , Dong Guan-Tao
Published: December 2019

Neutron radiation experiments of optocouplers at back-streaming white neutrons (back-n) in China Spallation Neutron Source (CSNS) are presented. The displacement damages induced by neutron radiation are analyzed. The performance degradations of two types of optocouplers are compared. The degradations of current transfer ratio (CTR) are analyzed, and the mechanisms induced by radiation are also demonstrated. With the increase of the accumulated fluence, the CTR is degrading linearly with neutron fluence. The radiation hardening of optocouplers can be improved when the forward current is increased. Other parameters related to CTR degradation of optocouplers are also analyzed.
Linear optical approach to supersymmetric dynamics*
Authors: Zhan Yong-Tao , Xu Xiao-Ye , Wang Qin-Qin , Pan Wei-Wei , Jan Munsif , Chang Fu-Ming , Sun Kai , Xu Jin-Shi , Han Yong-Jian , Li Chuan-Feng , Guo Guang-Can
Published: December 2019

The concept of supersymmetry developed in particle physics has been applied to various fields of modern physics. In quantum mechanics, the supersymmetric systems refer to the systems involving two supersymmetric partner Hamiltonians, whose energy levels are degeneracy except one of the systems has an extra ground state possibly, and the eigenstates of the partner systems can be mapped onto each other. Recently, an interferometric scheme has been proposed to show this relationship in ultracold atoms [Phys. Rev. A
96 043624 (2017)]. Here this approach is generalized to linear optics for observing the supersymmetric dynamics with photons. The time evolution operator is simulated approximately via Suzuki–Trotter expansion with considering the realization of the kinetic and potential terms separately. The former is realized through the diffraction nature of light and the later is implemented using a phase plate. Additionally, we propose an interferometric approach which can be implemented perfectly using an amplitude alternator to realize the non-unitary operator. The numerical results show that our scheme is universal and can be realized with current technologies.
Effects of buried oxide layer on working speed of SiGe heterojunction photo-transistor*
Authors: Liu Xian-Cheng , Ma Jia-Jun , Xie Hong-Yun , Ma Pei , Chen Liang , Guo Min , Zhang Wan-Rong
Published: December 2019

The effects of buried oxide (BOX) layer on the capacitance of SiGe heterojunction photo-transistor (HPT), including the collector–substrate capacitance, the base–collector capacitance, and the base–emitter capacitance, are studied by using a silicon-on-insulator (SOI) substrate as compared with the devices on native Si substrates. By introducing the BOX layer into Si-based SiGe HPT, the maximum photo-characteristic frequency f
t,opt of SOI-based SiGe HPT reaches up to 24.51 GHz, which is 1.5 times higher than the value obtained from Si-based SiGe HPT. In addition, the maximum optical cut-off frequency f

β,opt, namely its 3-dB bandwidth, reaches up to 1.13 GHz, improved by 1.18 times. However, with the increase of optical power or collector current, this improvement on the frequency characteristic from BOX layer becomes less dominant as confirmed by reducing the 3-dB bandwidth of SOI-based SiGe HPT which approaches to the 3-dB bandwidth of Si-based SiGe HPT at higher injection conditions.
Quantum adiabatic algorithms using unitary interpolation*
Authors: Zhang Shuo , Duan Qian-Heng , Li Tan , Fu Xiang-Qun , Huang He-Liang , Wang Xiang , Bao Wan-Su
Published: December 2019

We present two efficient quantum adiabatic algorithms for Bernstein–Vazirani problem and Simon’s problem. We show that the time complexities of the algorithms for Bernstein–Vazirani problem and Simon’s problem are O(1) and O(n), respectively, which are the same complexities as the corresponding algorithms in quantum circuit model. In these two algorithms, the adiabatic Hamiltonians are realized by unitary interpolation instead of standard linear interpolation. Comparing with the adiabatic algorithms using linear interpolation, the energy gaps of our algorithms keep constant. Therefore, the complexities are much easier to analyze using this method.
Impact of digitalization on improvement of economy, IT and Internet of business
Authors: Kutsuri G N , Kamberdieva S S , Dedegkaev V KH , Sopoeva I A , Shelkunova T G
Published: December 2019

The purpose of this research is to consider the concept and value of digital economy. The attention was concentrated on results of digital economy which are a part of the continuing digitalization process, but not on theoretical aspects. Results assume that the development of digital economy is necessary for strengthening economic relations between subjects for simplification and acceleration of work of people, doing processes simple and transparent; moreover, digitalization will increase the need for skilled work. The article reveals a certain aspect of an innovation in development of Internet technology, Internet of business and their extensive introduction into economy, medicine, education, and public administration, which would make them competitive in modern economic conditions.
How the development of Blockchain affected cybersecurity
Authors: Mentsiev A U , Magomadov V S , Ashakhanova M Z , Mentsiev A U , Alams M T
Published: December 2019

This research gives a brief insight into one of the most widely used technologies known as Blockchain. The paper lays the groundwork of how Blockchain functions and how it has quickly become a network with millions of users throughout the world. This study discusses the most important use of Blockchain technology, which is the enhancement of the cyber-security industry. Blockchain has revolutionized the cyber-security industry by introducing a system which is not bound to any four walls and is widely distributed all around the world, seeking refuge on millions of user servers. This decentralized system helps Blockchain defend cyber networks against security threats and attacks such as malware, phishing attacks, and DDoS.
Application of association rules learning for studying the store history of a large retail chain
Authors: Ogurtsov D A , Dorrer M G
Published: December 2019

In this article the problem of goods clustering according to the probability of their joint presence in the transactions of the sale point was considered. The problem was solved by applying the algorithms for the formation of association rules based on real retail store transactions. The applicability of the algorithms of this class was assessed, the Apriori algorithm proposed by R. Agrawal was selected and implemented. Using this algorithm, the possibility of cutting off “random” goods in a cluster to create a consumer basket of the corresponding outlet was studied. It is shown that the most resistant to “random” associations are clusters with a small number of products in the cluster, and the higher the cluster size, the higher the likelihood of noisy search results with “random” goods with a high individual probability of their acquisition (‘support’ indicator). Further development of the proposed method may consist in its distribution to all transactions of the entire trading network and the transition from the tasks of organizing goods within the store (merchandising) to the tasks of forming assortment matrices for stores.
Puck tracking system for aerohockey game with YOLO2
Authors: Tolmacheva A E , Ogurcov D A , Dorrer M G
Published: December 2019

This article is devoted to the preparation of the YOLO2 convolutional neural network for use in the robot artificial intelligence tracking module in air hockey competitions in the human-robot or robot-robot category. Such developments are unique in the sphere of artificial intelligence and robotic technologies. The task was to collect and prepare educational material, as well as further training and testing of the convolutional neural network to create a “vision” and further predict the trajectory of a fixed object. For this, the YOLO2 model was used, created by the developer Ali Farhadi in the low-level language C [1]. As a result of testing in the next game, the results of the correct detection of the object in the range of 80% were obtained, despite the lack of a standard camera position and poor image quality. In the future, the created system can be used in the further development of the AI robot systems and for creating tactics of behavior in various air hockey matches.
Study of longitudinal vibrations of stab knife refiners
Authors: Vikharev S , Zasypkina S A
Published: December 2019

The subject of research is the longitudinal vibrations of stab knife refiners. A model of the fibrous layer between the rotor and stator is developed. It is shown that it is advisable to use the Maxwell-Thomson model for liquid friction of the rotor and stator, and the Hooke elastic model for boundary friction. The formula for determining the dynamic stiffness of the fibrous layer is obtained. Dynamic and mathematical models of the refiner in the longitudinal direction are developed. The mathematical model is a system of linear differential equations with periodically varying coefficients (Mathieu-Hill equations). A method for calculating the amplitude of oscillations of the refiner rotor and stator is developed. According to this technique, Andritz 54-60-1c stab refiner was designed. Oscillation parameters of the refiner rotor and stator are determined theoretically and experimentally. The stator oscillation amplitude is 1.6–2.3 times smaller than the rotor oscillation one. In case of boundary friction, the amplitude of oscillations of the stator and rotor increases by 2–3 times in comparison with liquid friction. The oscillation amplitude of the rotor and stator in the longitudinal direction is comparable with the gap between these elements. Therefore, it is recommended while designing refiners, to develop methods and means of vibration protection, and during operation, to prevent boundary friction between headsets. The developed calculation procedure can be used in other industries, for example, mining and metallurgy.
Using vibration cutting for finish turning hard materials
Authors: Vladimirov A A , Makarov A V , Martynov E M
Published: December 2019

With the development of the facilities new materials with higher strength and performance characteristics are developed. But as these characteristics increase, others, such as machinability, deteriorate. In view of this, the question about the most sustainable method of machining, in particular cutting, came up. One of such methods is machining with the use of vibration cutting. The process of vibration cutting consists in superimposing on common kinematic scheme of machining the additional vibrating movement of a tool or workpiece, which is characterized by the direction, shape, amplitude and frequency of vibrations. Superimposing of vibrations on the tool or treated material during drilling, turning, grinding, forming and pressing provides a considerable physical effect of cutting force reducing and friction forces reducing, it facilitates the processes of flow deformations, increases the tools life and improves the quality of machining.
Modeling the operation of climate control system in premises based on fuzzy controller
Authors: Sansyzbay L Zh , Orazbayev B B
Published: December 2019

Most of the currently existing microclimate control systems operate on the basis of traditional P, PI, PID controllers. But the work of such systems is effective only in a narrow operating range. With significant fluctuations in environment, it is required to reconfigure the parameters of these regulators each time. In such cases, maintaining comfortable conditions in the room is recommended by using intelligent control technologies, so-called fuzzy control systems, operating in terms of fuzzy logic. The aim of the paper is to research the possibility of implementation of intelligent control systems to maintain the comfortable microclimate in the premises and checking the adequacy of the system through simulation. The climate control system is based on fuzzy inference and provides forming the base of fuzzy production rules, fuzzification of input values, aggregation of truth of sub conditions of each rule, activation of conclusions and defuzzification process that generates an output signal to control the smart home functional devices. Procedures of the fuzzy inference and simulation are implemented in the Matlab programming environment using the Fuzzy Logic Toolbox and Simulink packages. The results of the paper showed that the developed intelligent microclimate control system for premises based on fuzzy logic provides a flexible self-tuning of the engineering equipment and maintaining the microclimate parameters at the required level.
Formation of diffusion titanium coatings from liquid metal media solutions on hard alloys WC-Co and TiC-WC-Co
Authors: Bobylyov E E
Published: December 2019

The technology of diffusion titanium coating from the liquid metal media to the carbide-tipped tolls 15%Ti-WC-6%Co and WC-8%Co have described. The thickness of the coating varies depending on the temperature and holding time of diffusion saturation, and ranges from 2,6 to 5,6 μm on alloys of the 15%Ti-WC-6%Co type, from 2 to 5,4 microns on WC-8%Co alloys. It is revealed, that the elemental composition depended of composition of hard alloy. The microhardness of coating on hard alloy 15%Ti-WC-6%Co is 30000 MPa, and for hard alloy WC-8%Co is 24750 MPa. The high microhardness of the coating is provides by its formation on the basis of titanium carbide TiC. It was found that the elemental composition of the coating depends of the composition of the hard alloy to which it is applied. It was found that the surface layers consist of titanium carbide TiC, α-Ti like bind, intermatallide Ti2Co for 15%Ti-WC-6%Co alloy. The WC-8%Co alloy also include tungsten carbide WC.
The modification of temperature control at each stage of V-star continuous flow reactor
Authors: Musaevich Ibragim B , Vladimirovich Rumyantsev E , Musaevich Bamatov D , Musaevich Bamatov D
Published: December 2019

This research paper is about the modification of continuous flow reactor (V-star), with a temperature control by using huber (Unistat 705) with an oil flow for each stage on the chemical aggregate. Besides, one of the most important role of this project is to illustrate the change of chemical reaction from batch into continuous flow due to better controlling the process at each stage of the reactor. Besides, the modification follows by installing the thermo-sensors at each stage of V-star and their signal transfer to the control panel. Finally, in this article, the results of the reactor tests are illustrated, to demonstrate the possibilities of modified V-star.
About one of the factors determining the failure rate in the working equipment of mining excavators
Authors: Velikanov V S , Dyorina N V , Antropova L I , Zalavina T Yu
Published: December 2019

To date, the development of mining is carried out mainly opencast, which provides competitive economic indicators for the mining industry. Open mining of mineral deposits is characterized by an increase in the volume of processed rock mass and overburden ratios, production processes are improved due to advanced technologies, which entails the use of mining equipment of large unit capacity. So the efficiency of such equipment is ensured by its correct operation, minimizing the cost of its maintenance and repairs. The object of the paper is to establish and evaluate the factor that most significantly determines the failure rate in the working equipment of mining excavators.
Research of motor oil oxidation processes
Authors: Kovalsky B I , Bezborodov YU N , Lysyannikova N N , Pustovit P YU , Shram V G , Lysyannikov A V
Published: December 2019

The research results of oxidation, evaporation and changes in the coefficient of thermal-oxidative stability, which takes into account these processes by the increment rate of semi-synthetic motor oil Rosneft Maximum 10W-40 SL/CF in the temperature range from 170 to 150 ° C, are presented. The increment rates of oxidation and evaporation processes from time and temperature of testing these processes are determined. The graphical and analytical model is proposed for predicting the indicators of thermo-oxidative stability at a wider temperature range for testing oils based on the results obtained at three temperatures.
Weather conditions as a factor affecting the performance of modern powerful mining excavators
Authors: Ivanov S L , Ivanova P V , Kuvshinkin S U
Published: December 2019

The article discusses various factors that have a significant impact on the performance of EKG-32R type powerful mining excavators. It was revealed that the most adverse effects are weather conditions that are different from the nominal ones for which mining machines are designed. The climatic factor includes the impact of solar radiation, low and high air temperatures, wind speed, humidity, fog, snowstorms, snow storms etc on mining equipment. The transformation of the properties of structural materials is also determined by the intensity and duration of exposure to these factors and their combination. A methodology is proposed for assessing the influence of weather conditions on the operation of mining equipment, which allows one to analyze the influence of each climatic parameter separately and evaluate the complex effect. It is proposed to take into account the influence of the climatic factor on the performance of mining excavators through a complex indicator - the weather stiffness index, which takes into account the parameters of any type of climate for the entire calendar period of the excavator exploitation.
Methods of decoding of the geoecological conditions of natural-anthropogenic complexes based on the data of Earth remote sensing
Authors: Strizhenok A V , Ivanov A V , Suprun I K
Published: December 2019

There is a steady tendency to significantly increase the volume of extraction and processing of mineral raw materials on our planet in recent decades. It leads to an increase in the volume of industrial waste, which predominant method of disposal is placement on the Earth surface in the form of anthropogenic arrays. There are accumulated billions tons of waste in such anthropogenic arrays, but its height can reach 100 meters. It determines the deterioration of the sanitary and hygienic situation in these territories, an increase in the morbidity and mortality of the population, a decrease in the species diversity of animals and plants, violation and modification of natural landscapes, and loss of natural resources. In addition, such anthropogenic arrays are especially subjecting to the risk of emergencies, which can entail significant social, environmental and economic damage. In this regard, the development and implementation of environmental monitoring systems on the territory of the impact of industrial waste storages, which can quickly identify sources of anthropogenic load and carry out their timely elimination, is of particular relevance to society, the economy and the state. Monitoring of the state of components of the environment based on remote sensing data is one of the most innovative and developing areas of environmental monitoring today.
Dynamic method of controlling friction losses in the mechanism of converting reciprocating motion into rotary inline piston internal combustion engines
Authors: Egorov A V , Lysyannikov A V , Kaizer Yu F , Andryuhin N S , Dorohin S V , Kuznetsov A V , Bogdanov E N , Lysyannikova N N
Published: December 2019

The task of reducing friction in internal combustion engines is an important task of the development of transport engineering. As the analysis of literature sources shows, the problem of reducing friction losses in relation to internal combustion engines is usually solved for each individual friction pair, for example, a cylinder-skirt of a piston or a cylinder - compression ring. In this case, the measurement of friction is carried out mainly in stationary conditions. However, such approaches do not allow to identify the most critical, in terms of friction in all friction pairs of internal combustion engines, operating modes and do not allow to study and control the friction processes of all friction pairs in of the internal combustion engines. The developed dynamic methods of control of mechanical parameters of engines of rotational action and drives on their basis allow to synthesize a dynamic method of control of friction losses in the internal combustion engines, the scientific and technical justification of which is devoted to this work. Critical, from the point of view of the developed method, is the calculation of the value given to the axis of rotation of the crankshaft moment of inertia of the parts of the crank mechanism, changing during one revolution of the crankshaft.
About the development of multimodal transportation based on modeling of cargo placement
Authors: Golovina E S , Levshonkov N V
Published: December 2019

The organization of logistics transportation management systems with the interaction of various modes of transport is an important present problem of the development of the transport system, as well as the development of transport infrastructure with the construction of terminal complexes and ports providing multimodal transport and intermodal technologies. This problem includes the task of integrated transport development within the framework of multimodal transport hubs (transport and logistics centers). Multimodal transport hubs are capable to solve tasks in participants work coordinating in the transport process within the framework of the existing transport system, and tasks in modernizing of the transport system and creating a modern support transport grid. A great contribution to the development of the transport system is also made by modeling. Modeling of the rational cargo placement in a vehicle will make it possible to achieve the most rational using of space in a vehicle, which will also bring economic benefits.
Automated control of products by methods of short-wave electromagnetic radiation
Authors: Ovechkin M V
Published: December 2019

The paper considers the problem of effective automation of non-destructive testing of welded joints. The boundaries of the study include short-wave methods of electromagnetic control of products on the example of radiography. The author describes the developed methodology for the automated control of products by the methods of short-wave electromagnetic radiation, which includes: automated control algorithms and software based on them; description of the generated sequence of automated control; software application practices, including end-to-end examples of automated control. An artificial neural network is used as a data processing method.
Laser welding with deep alloying of the elements of the truck chassis
Authors: Gusev A A , Zhuchenko S I , Ogin P A , Guseva G V
Published: December 2019

A method of laser welding with simultaneous alloying of 2.4060 over the entire depth of the melt bath for connecting the crankcase and the steering knuckle of a truck chassis is described. The results of experimental studies of the macro and microstructure of various zones of laser welding of 35HGSA steel with steel 1.0570 are presented. A comparative analysis of the hardness of the melt zone and the heat affected zones for samples with and without alloying is carried out.
The method of monitoring the indicators of thermo-oxidative stability of mixtures of motor oils
Authors: Kovalsky B I , Afanasov V I , Shram V G , Bezborodov Yu N , Petrov O N
Published: December 2019

The results of a study of mixtures of mineral motor oil M-10G2k with 5% by weight of Castrol 0W-30 SL/CF synthetic oil are presented. The redistribution of thermal energy is considered, which was investigated by the dependence of the increment of the absorption coefficients of the light flux and evaporation on the time and temperature of the test. The effect of the synthetic additive on the optical properties, volatility, coefficient of thermo-oxidative stability, kinematic viscosity when testing the mixture in the temperature range from 160 to 180 °C is established.
Study of the effect of the synthetic additive Monnol Elite 5W-40 SL/CF on the quality indicators of mineral motor oil M-10G2k
Authors: Afanasov V I , Kovalsky B I , Shram V G , Bezborodov Yu N , Petrov O N , Kovaleva M A
Published: December 2019

The results of a study of mixtures of mineral motor oil M-10G2k with 5% by weight of synthetic oil Monnol Elite 5W-40 SL/CF are presented. The effect of a synthetic additive on the optical properties, volatility, and coefficient of thermo-oxidative stability is established when testing a mixture in the temperature range from 180 to 160 0C.
Capabilities analysis of lidar and passive optical methods for remote vegetation monitoring
Authors: Belov M L , Belov A M , Gorodnichev V A , Alkov S V
Published: December 2019

We have conducted a comparative analysis of efficiency to detect vegetation under adverse conditions by remote lidar and passive optical methods. The paper shows that a lidar method for monitoring at 1.65 and 2.03 μm wavelengths allows us to detect vegetation plots under adverse conditions with a probability of correct detection close to one and a probability of false alarm ~ second decimal places. A laser method that uses two eye-safe sensing wavelengths in the NIR spectral band can lie at the core of the airborne vegetation monitoring method.
Experimental studies of efficient sensing fluorescence radiation bands to detect oil and petroleum product spills
Authors: Fedotov Yu V , Kravtsov D A , Belov S L , Gorodnichev V A
Published: December 2019

We have experimentally studied the laser-induced spectra of petroleum products at the excitation fluorescence wavelength of 266 nm. The paper depicts a schematic diagram of the laboratory setup, gives data resulted from processing of laser-induced fluorescence spectra, and shows that, in comparison with spectra of petroleum products, the laser-induced fluorescence spectra of oil have a shift toward the longer wavelength spectral region and a far wider spectral bandwidth. For oil, an efficient band of sensing fluorescence radiation, is of ~ 390 – 600 nm in average. For gasoline, an efficient band of sensing fluorescence radiation has a significant shift toward the shorter wavelength region (~ 320 – 360 nm) as compared to the efficient sensing fluorescence radiation band for diesel and engine oils (~ 330-395 nm).
Load characteristics of a turbocharged diesel engine when working on natural gas
Authors: Grebnev A V , Chuprakov A I , Toropov A E
Published: December 2019

The article presents the load characteristics of the diesel D-245.7 when working on the gas-diesel process. The graphs of changes in the parameters of the combustion process, heat release characteristics, and effective indicators are given. It is important to study the issues of converting diesel engines to natural gas, as diesel engine is the most common in the national economy. The most suitable way of converting diesel engines to natural gas is to implement a gas-diesel workflow, since it does not require a significant engine rework. Diesel D-245.7 was chosen as an object of study. In the course of the study, among other things, the load characteristics of this diesel engine were removed when working on the gas-diesel process. When analyzing the experimental data obtained for a gas-diesel process as compared to a diesel one, some features can be noted. The gas-diesel process shows an increase in the temperature and pressure of gases in the cylinder. Heat dissipation is much faster. This indicates the volumetric nature of the ignition and combustion of natural gas. Engine power during the transition to the gas-diesel process is maintained at the same level, while the consumption of diesel fuel due to replacement by natural gas is reduced several times.
Influence of technical condition parameters on the residual resource of capacitive equipment
Authors: Kulakov P A , Rubtsov A V , Afanasenko V G , Zubkova O E , Sharipova R R , Gudnikova A A
Published: December 2019

The work solved the problem of resource assignment to the safe operation of capacitive devices after carrying out technical diagnostics on permissible technical parameters, depending on the combined effect of the parameters of the technical condition of the equipment oil and gas refining and petrochemical industries. 10 technical and technological parameters of capacitive devices were selected, and the evaluation was carried out using such an indicator as the residual service life of capacitive devices. The authors developed a mathematical model, calculated diagnostic coefficients and informative value of the indicator for each period adopted by the expert. An algorithm for estimating the residual service life of capacitive devices based on the measure of information content of Kulbak is proposed. The estimates of the residual life, which are out of the constructed model, are shown. Conclusions about the rationality of the proposed algorithm for solving problems of this type are made.
The results of the research of motor oils by the method of predicting indicators of thermal-oxidation stability
Authors: Bezborodov Yu N , Lysyannikova N N , Kirpichenko A A , Lysyannikov A V , Kovaleva M A , Egorov A V
Published: December 2019

The results of a study of the thermal-oxidation stability of motor oils are presented. The experimental data were obtained and analyzed by means of regression analysis, and graphical dependencies were constructed that clearly demonstrate the reaction of the lubricant to changing environmental conditions and with the help of which it was established that it is possible to determine the temperature of the onset of oxidation processes and temperature conversions, as well as their critical temperatures. As a criterion for evaluating thermal-oxidation stability, a coefficient of thermal-oxidation stability is recommended, taking into account the optical density and volatility of the oil. It shows the effectiveness of the method of predicting the performance indicators of a lubricant among existing research techniques.
Determination of the sorption characteristics of ammonium perrenate ions on anion exchange resin AV-17-8
Authors: Lutskiy D S , Ignatovich A S , Sulimova M A
Published: December 2019

The article considers one of the aspects of the processing of copper waste, containing in addition to a significant amount of copper several dispersed elements, one of the most interesting for extraction is rhenium. The dynamic and full dynamic sorption capacity of the sorbent AV-17-in case of perrhenate ions from ammonia solutions of leaching of copper smelting was determined.
Sulfur dioxide emission assessment using OMI data
Authors: Zuevskaya A I , Garifullin V F , Zuev D V , Zander F V , Temerbaev S A
Published: December 2019

The study is devoted to the estimation of sulfur dioxide emissions into the atmosphere based on satellite monitoring data in the area of the Norilsk industrial zone from 2010 to 2018. According to the measurements of the Ozone Monitoring Instrument - AURA satellite the NASA database is used. The maximum sulfur dioxide emissions amounted to 95 kt/month in November 2016, and the minimum - 0.185 kt/month in August 2011. The largest share of emissions is in January-May and November (90%). Comparison of the data obtained by the satellite method with the ground method revealed a difference of 30 to 65%, and with the method using aircraft carrier by 14 percent.
Calculation of balancing and filter compensating devices of the power supply system
Authors: Lukovenko A S , Kukartsev V V , Tynchenko V S , Mikhalev A S , Kukartsev V A , Bashmur K A
Published: December 2019

The problem of reducing the quality of electricity is increasingly arising in the process of increasing energy capacities. The decrease in the quality of electricity can be caused by many different factors that manifest themselves under certain circumstances, and therefore have different solutions for their elimination. The most acute problem is the impact of the electricity quality on the energy parameters of electrical equipment and power receivers in the metallurgical industry and on the railway. The article discusses the features of calculating the asymmetry of currents in a traction AC network. The main moments of calculating the settings of balancing devices are determined. The initial calculation data for balancing devices were taken from the dynamic parameters of one of the operating modes of a power transformer TDTNZh 40 MVA, to which two single-phase loads with a capacity of 17 MVA are connected to terminals AB and 10 MVA to terminals BC. The current of the negative sequence and the coefficient of the negative sequence are calculated, and the filter compensating device is also calculated using the parameters of the balancing device. Based on the calculations, the magnitude of the negative sequence current asymmetry was established and the calculation procedure for the balancing device connected to the traction winding of the transformer with the connection group Y/Δ-11 was implemented.
Educational environment of universities to creating technosphere safety and development of innovation economy
Authors: Smirnova T L
Published: December 2019

The paper examines the role of education in economic development from both a theoretical and a historic perspective, addresses why education has been the limiting factor of sustainable development. Educated workers raise national income directly and productivity of labour. This paper shows the impact of human capital development on economic growth in national economy through educational environment of universities in condition technosphere safety. In the study recommended that government would guarantee quality education environment of universities for development of innovation economy. Government should also commit more funds to enhance human capital development and environmental protection.
Prediction of injury to passengers of railway rolling stock based on modern physical simulation methods
Authors: Shorokhov S G , Bondarenko O I , Kobishanov V V
Published: December 2019

A technique for assessing the levels of injury to passengers and train crew members in emergency collisions is proposed. It is based on the use of physical methods for simulating fast-flowing non-linear processes of material deformation in emergency situations and anthropometric dummies. Based on the analysis of world and domestic experience in the study of injuring people in emergency situations in transport, an anthropometric 50 percentile male Dummy Hybrid III was adopted as a research tool. Its mathematical model is developed. It was verified by data from field experiments. The developed dummies are integrated into mathematical models for the development of emergency scenarios. As objects of study, the most promising types of rail car layout and two locomotive options were considered for the domestic rolling stock. Based on the simulation results, the values of the criteria for injuring passengers and members of locomotive crews in emergency situations are obtained. The most dangerous positions of passengers in the car during longitudinal collision of trains for the considered layout options are determined. It has been established that the most serious injuries are suffered by passengers and members of locomotive crews as a result of their interaction with car interior items and controls of the driver’s cab.
Assessment models for the generalized quality criterion for the production processes of thermal power plants
Authors: Tynchenko Ya A , Saramud M V , Kovalev I V
Published: December 2019

In order to increase the information reliability of the hardware and software technology for industrial and environmental monitoring, we obtained models of the thermal power plants production processes that can give an assessment of a generalized quality criterion for the occurrence of such technological processes as the preparation of fuel, fuel combustion, removal of flue gases and suspended particles. To form the measured values of the parameters of each technological process, a multiversion approach is used, which is based on obtaining the n-th amount of measured data.
Bar-shaped Magnetoelectric Gyrator
Authors: Leung Chung Ming , Zhuang Xin , Li Jiefang , Viehland D
Published: December 2019

This paper reports a dual-resonance power transfer effect and a dual-resonance I-V conversion for a bar-shaped ME gyrator made from a hard Pb(ZrxTi1−x)O3 (PZT) ceramic bar having a transverse polarization and a Tb0.3Dy0.7Fe1.92 (Terfenol-D) magnetostrictive alloy bar having a longitudinal magnetization bonded along their cross-section areas. A bar-shaped provides several advantages to a ME gyrator; such as dual resonance frequency along its length direction, as well as half-wave and full-wave vibration modes; reduced laminate bonding area avoiding adhesive breakdown; and ease of fabrication. The reported magnetoelectric gyrator effect originates from the mechanically mediated resonance piezoelectric and magnetostrictive effects in the PZT and Terfenol-D bars, respectively. We studied the influence of the length ratio between the Terfenol-D and piezoelectric bars. A power efficiency of 69.4% was obtained at the half wavelength resonance of 21.47kHz under optimal H
Bias=1000 Oe and low power conditions. Under higher power drive of 8W/in3, an efficiency of 60.2% was found. This dual-resonance ME gyrator effect offers much promise in power transfer devices for power electronic applications.