bluuebunny/crossref_metadata_2025 huggingface dataset:
Coal identification using neural networks with real-time coalbed methane drilling data
Authors: Zhong Ruizhi , Johnson Jr Raymond , Chen Zhongwei , Chand Nathaniel
Published: June 2019

Currently, coal is identified using coring data or log interpretation. Coring is the most dependable methodology, but it is costly and its characterisation is expensive and time consuming. Logging methods are convenient, reliable, and reproducible, but can be subject to statistical and shouldering effects and often have operational difficulties in deviated or horizontal wells. Drilling data, which are routinely available, can potentially be used to identify coal sections in a machine learning environment when conventional wireline logs are not available.
To achieve this, a four-layer artificial neural network (ANN) was used to identify coals in a well at Walloon Sub-Group, Surat Basin. The ANN model used drilling data and some logging-while-drilling (LWD) data. The inputs for the lithological model from high-frequency drilling data include weight on bit, rotary speed, torque, and rate of penetration. Inputs from LWD data include gamma ray and hole diameter. The criterion for coal identification is based on bulk density cutoff.
The simulation results show that the ANN can deliver an overall accuracy of 96%. Due to the low net-to-gross ratio of coals within the Walloon sequence, a lower but reasonable F1 score of 0.78 is achievable for the coal sections. The proposed model can potentially be implemented in real-time to identify coal intervals without additional logs and aid validation of minimal log data.
Managing escape, evacuation and rescue (EER) risk on aging offshore facilities
Authors: Netscher Nick , Thompson Jaime
Published: June 2019

Esso Australia Resources Pty Ltd and BHP Petroleum (Bass Strait) Pty Ltd own numerous offshore facilities, which have been operated by Esso Australia Pty Ltd (EAPL) for over 40 years. With respect to escape, evacuation and rescue (EER), the long standing philosophy for these facilities has been to muster at the external assembly areas (EAA) near the evacuation lifeboat stations, to allow for swift evacuation when the need is apparent. This philosophy has underpinned the design of these offshore assets to date.
For new-build offshore facilities, typical EER philosophies include the provision of an enclosed temporary refuge (TR), specifically to maintain a safe environment for personnel (in the event of an emergency) such that they can muster before evacuation, or remain on the facility until the event is brought under control. TRs typically provide protection to personnel from hazards that the EAA may not (i.e. smoke), but may increase the duration of a potential evacuation if they are not located within close proximity to evacuation stations.
This paper considers the potential changes in risk presented by the two evacuation philosophies, and the potential implications of changing from one philosophy to another on an existing facility. The analysis expands to facility operational and design considerations.
This paper also describes a methodology to leverage existing quantitative risk assessments to assess (a) how the risk profile to personnel may change depending on the EER philosophy; (b) how the implementation of additional risk controls will impact risk; and (c) how the results of the assessment can be used to establish an ‘as low as is reasonably practicable’ (ALARP) position.
Challenges in modelling of hydraulic fracturing in low-permeability coal seams with complex cleat networks and stress regimes
Authors: Aghighi Mohammad Ali , Johnson Jr. Raymond , Leonardi Chris
Published: June 2019

Improved hydraulic fracturing models can better inform operational decisions regarding production from low-permeability coals and ultimately convert currently classified contingent resources to reserves. Improving current modelling approaches requires identification and investigation of the challenges involved in modelling hydraulic fracture stimulation in complex eastern Australian cases where permeability systems and stress regimes can vary significantly. This study investigated differences among existing and emerging advanced hydraulic fracture models and codes including numerical methods used to model fluid and rock behaviours during treatments; the ability to contextualise structure, behaviour and interaction of natural fractures with the propagating hydraulic fracture (e.g. cleat or natural fracture fabric, discrete fracture networks and pressure-dependent leak-off); and their capabilities in handling simultaneously growing or complex fracture development. One finding is that the new generation of models or codes that fully or partially use particle-based numerical methods are more capable in handling complexities associated with hydraulic stimulation of naturally fractured reservoirs. However, the computational cost and time for these models may cause concerns, particularly when modelling large reservoirs and treatments. Based on these limitations, many of the advanced, industry preferred, commercial hydraulic fracture simulators still choose to incorporate limited complexities with regard to natural fractures or represent them mathematically or implicitly. This investigation also indicates that most emerging models provide better representation of natural fractures, visualisation and integration into workflows for completion or stimulation design.
Application of deep learning for seismic horizon interpretation
Authors: Lowell James , Smith Jacob
Published: June 2019

The interpretation of key horizons on seismic data is an essential but time-consuming part of the subsurface workflow. This is compounded when surfaces need to be re-interpreted on variations of the same data, such as angle stacks, 4D data, or reprocessed data. Deep learning networks, which are a subset of machine learning, have the potential to automate this reinterpretation process, and significantly increase the efficiency of the subsurface workflow. This study investigates whether a deep learning network can learn from a single horizon interpretation in order to identify that event in a different version of the same data. The results were largely successful with the target horizon correctly identified in an alternative offset stack, and was correctly repositioned in areas where there was misalignment between the training data and the test data.
Safe and efficient delivery of logistics solutions to coal seam gas well sites, utilising our 'Well in a Box' methodology
Authors: King Jason , Yeong Brandon
Published: June 2019

Queensland coal seam gas (CSG) company Arrow Energy (Arrow) has implemented a safer, more efficient and cost effective approach to the transportation and supply of well materials to site. This paper examines Arrow’s approach to mitigating the transportation risks. It looks at current transport health, safety and environment (HSE) challenges, approach to address these risks, outcomes and future opportunities. The movement of well materials has been a concern for Arrow; it is a repetitive activity because wells are drilled, completed and worked over on a regular basis. Arrow’s challenge was to determine a better and safer way to load, unload and transport these materials. To address this material handling risk, an Arrow team developed a specially modified 40-foot flat rack (FR) capable of safely and securely holding a variety of materials. The FR can be picked up by a side-loader truck (swing-lifter), thereby enabling autonomous and safe loading and unloading. Warehouse staff can pre-pack all materials, thereby saving significant time for loading and unloading. Time and resources are also saved at the rig site where the FR can be unloaded autonomously. This unique design reduces human interaction and improves HSE personal safety risk significantly. A continuous improvement approach to further enhance the FR design to achieve better efficiency and safety for staff, as well as expanding its use to other business areas, is a key priority to Arrow.
Investigation of permeability change in the Bandanna Coal Formation of the Fairview Field using time-lapse pressure transient analysis
Authors: Salmachi A. , Barkla J.
Published: June 2019

Permeability of coal seam gas (CSG) reservoirs is stress/desorption dependent and may change during the life of the reservoir. This study investigates permeability change with depletion in several CSG wells in the Fairview Field: a prolific reservoir in the Bowen Basin, Australia. High-resolution pressure gauges at surface provide an opportunity to conduct time-lapse pressure transient analysis (PTA) on the wells that have multiple shut-ins. Pressure build-up tests can be replicated by calculating bottom-hole pressure when surface pressure (tubing and/or annulus) is recorded at high-resolution during any shut-in event. This eliminates the need to perform multiple well tests, which are time consuming and costly to run. The production history of 100 CSG wells was examined to find suitable candidates to perform time-lapse PTA. This was used to investigate how Bandanna Coal permeability changes with depletion. Three wells with high-quality shut-ins were identified and analysed to calculate effective permeability to gas and average reservoir pressure. The results indicate that coal permeability can enhance up to one order of magnitude during the life of a CSG well in the Fairview Field, and this can significantly improve production performance. These wells, located in a depleted area of the field, show rapid increase in permeability with decline in average reservoir pressure. The integration of rate transient analysis with the results of time-lapse PTA for one of the study wells reveals that the functional form of permeability increase is exponential in the study area, and a permeability modulus of –0.00678 psia–1 was obtained.
Impact of capillary trapping on CSG recovery: an overlooked phenomenon
Authors: Zhu Yiran , Chen Zhongwei , Xing Huilin , Rudolph Victor
Published: June 2019

The impact of water on gas production has been commonly reflected using relative permeability curves, which are obtained by measuring the flow behaviour of each phase through a core sample. This approach reflects the overall response of a core to flow but is unable to capture the capillary trapping phenomenon at the microscale, which is expected to vary significantly for coals with different microstructures. The overlook of trapping effect could potentially overestimate gas production, a topic that does not appear to be well explored. In this work, the impact of capillary trapping on gas recovery was investigated numerically through a fully coupled water-gas two-phase flow model. The characterisation of a coal microstructure, surface chemistry (e.g. coal wettability) and an isotherm curve was summarised for Bowen Basin coal. Various sensitivity studies were then conducted at coal matrix scale to quantify the amount of gas trapped by capillary forces under different reservoir conditions and production controls. Our results show that for the studied coal parameters from the Bowen Basin, the capillary trapping effect hinders gas breakthrough noticeably, causing unwanted high abandonment pressure and reduction in gas recovery rate. Among all investigated parameters, pore size has the most important effect on trapped gas percentage. If taking 3 MPa as initial reservoir pressure, 300 kPa as the abandonment pressure baseline, 63.58 kPa as the gas breakthrough pressure, then the trapped gas accounts up to 4.02% of the total predicted gas; the trapped gas percentage will increase considerably if the saturation of gas is very low, although this variability is largely dependent on reservoir condition.
Leadership–followership disconnect and democratic decline in Nigeria
Authors: Arowolo Dare Eezekiel
Published: June 2019

Leadership dispositions in politics determine, to a large extent, the direction, nature and character of democracy and electoral politics. For a long time, Nigeria has had power-mongering leadership, whose dispositions have redefined followership behaviour. Leadership–followership disconnect has impacted on democracy. Consequently, democracy in Nigeria operates in breach of its tenets. Most elections in Nigeria are synonymous with insidious violence, which have attracted the attention of scholars with insightful analyses. However, there has to date been little systematic evaluation of the primary factors accounting for democratic decline in Nigeria with particular regard to leadership– followership dialectic. This article interrogates the relationship between leadership dispositions and followership behaviour and the effect on democracy. Using content analysis, this article finds evidence that leadership–followership disconnect is the most important factor accounting for democratic decline in Nigeria. The findings are relevant both for understanding the dynamics of leadership–followership disconnect and its impact on democracy in Nigeria.
Cortical and spinal excitabilities are differently balanced in power athletes
Authors: Grosprêtre Sidney , Bouguetoch Amandine , Martin Alain
Published: June 2019

It is recognised that power‐sport practices have a particular effect on lower‐limb neuromuscular parameters. Less is known about corticospinal network adaptation, however, or whether these adaptations are specific to the lower limb. In the present study, the corticospinal and spinal excitabilities of upper and lower limbs have been examined in a group of untrained participants (UT, n = 10) and compared to those of a group of well‐trained athletes practicing parkour (PK, n = 10). This activity, consisting of overcoming obstacles offered by the urban environment, was chosen as a model of power activity. The motor evoked potentials (MEPs) induced by transcranial magnetic stimulations and H‐reflexes and maximal M‐waves evoked by peripheral nerve stimulations were elicited in both upper‐ (flexor carpi radialis [FCR]) and lower‐limb muscles (soleus [SOL] and gastrocnemius medialis [GM]). The results tended toward an overall greater corticospinal excitability in PK than in UT (as evidenced by greater MEP/Mmax ratio) and lower spinal excitability (lower Hmax/Mmax). H/MMAX ratio was lower for PK (0.32) than for UT (0.41) in SOL (p = 0.02), while MEP/MMAX was greater for PK than for UT in FCR (PK: 0.12; UT: 0.06; P = 0.04) and in GM (PK: 0.05, UT: 0.03, P = 0.02). In both limbs, the decrease of spinal excitability induced by parkour practice was counterbalanced by an increase in cortical excitability. Finally, the present study indicates that such long‐term power practice leads to similar corticospinal plasticity in upper and lower limbs, explained by the similar solicitation of those muscles.
Clathrin-containing adhesion complexes
Authors: Lock John G. , Baschieri Francesco , Jones Matthew C. , Humphries Jonathan D. , Montagnac Guillaume , Strömblad Staffan , Humphries Martin J.
Published: June 2019

An understanding of the mechanisms whereby cell adhesion complexes (ACs) relay signals bidirectionally across the plasma membrane is necessary to interpret the role of adhesion in regulating migration, differentiation, and growth. A range of AC types has been defined, but to date all have similar compositions and are dependent on a connection to the actin cytoskeleton. Recently, a new class of AC has been reported that normally lacks association with both the cytoskeleton and integrin-associated adhesome components, but is rich in components of the clathrin-mediated endocytosis machinery. The characterization of this new type of adhesion structure, which is emphasized by mitotic cells and cells in long-term culture, identifies a hitherto underappreciated link between the adhesion machinery and clathrin structures at the plasma membrane. While this discovery has implications for how ACs are assembled and disassembled, it raises many other issues. Consequently, to increase awareness within the field, and stimulate research, we explore a number of the most significant questions below.
Photoacoustic tomography with direction dependent data: an exact series reconstruction approach
Authors: Zangerl Gerhard , Moon Sunghwan , Haltmeier Markus
Published: June 2019

Photoacoustic image reconstruction often assumes that the restriction of the acoustic pressure on the detection surface is given. However, commonly used detectors often have a certain directivity and frequency dependence, in which case the measured data are more accurately described as a linear combination of the acoustic pressure and its normal derivative on the detection surface. In this paper, we consider the inverse source problem for data that are a combination of the acoustic pressure and its normal derivative. For the special case of a spherical detection geometry we derive exact frequency domain reconstruction formulas. We present numerical results showing the robustness and validity of the derived formulas. Moreover, we compare several different combinations of the pressure and its normal derivative showing that used measurement model significantly affects the recovered initial pressure.
The effect of NaOH concentration variation in the process of paper making from bamboo fiber
Authors: Dulmalik  , Dwiky MI , N Kumala S , Fety IR , Khaliq FN
Published: June 2019

Bamboo cropping period is quite short compared to wood, but fiber and bamboo pulp have not been optimally used as a substitute for wood in composite industry, such as fiber board. It is worth to be investigated because of the availability of wood is declining. Therefore, this research aimed at revealing the use of fiber and bamboo pulp (G. apus) for fiberboard. The study was conducted using bamboo fibers from bamboo strips cooked with soda process and bamboo pulp from chips of bamboo cooked with soda process and Kraft process. Composite of bamboo fiber is made with a variety of fiber weight fraction to the epoxy resin matrix. Furthermore composite of bamboo pulp is made under optimal condition for making fiber composite. Based on the test results, it is known that the quality of the bamboo fiber composite from bamboo strips cooked with soda process is better than the composite of bamboo pulp. Besides, the produced bamboo fiber composites can be categorized as the high-density fiberboard meanwhile for the aspect of water content, water absorption, length and thickness changes, flexural strength and modulus of elasticity are in accordance with applicable standard for fiberboard (SNI 01-4449 - 2006).
Android-based applications on teaching skills based on TPACK analysis
Authors: Utami P , Pahlevi FR , Santoso D , Fajaryati N , Destiana B , Ismail ME
Published: June 2019

Teaching skills learned in micro-teaching are important competencies in the learning management. Dependence of other parties, both lecturers and colleagues teaching during the assessment process of teaching practice and lack of media that integrates the concept of material, examples, and practices are obstacles in mastering teaching skills. This article describes the specifications needed of an Android-based learning tool (media) for microteaching (“Microteaching”) courses and analyzes the performance of these learning media. The development phase begins with Analysis, Design, Development, and Evaluation. The results of the analysis referring to TPACK and the design showed that the specifications of the Android-based media consisted of two main menus namely material (containing various multimedia elements) and assessment (besides text-based assessment also contained speech recognition elements). The performance of “Microteaching” in functionality is 100% successful, while the feasibility test at the evaluation stage not only for media experts, but material experts and users indicates that the media is suitable for use. Furthermore, results of the assessment show that the media is able to depend on the assessment, except from the aspect of verbal aspects. Integration of learning concept material through mind maps, technical examples related to verbal teaching skills and videos to provide concrete description of how to teach (both verbal and non-verbal).
Developing a control system for a racket-wielding robot using a combination of promoximity sensor and pneumatic actuator to optimize shuttlecocck hit
Authors: Khairudin M , Soeharto
Published: June 2019

This study aims at developing a stroke control system in a racket-wielding robot using a combination of proximity sensor and pneumatic actuator to optimize a shuttlecock hit. As the shuttlecock can come at any time and from any directions, this racket-wielding robot is developed to produce accuracy in its serving distance, service timing, and arm swing, resulting in an optimum hit. A research and development method was employed in this study with every stage of the sub-system development was tested for evaluation and revision. This study has developed and implemented a prototype of a stroke control system for a racket-wielding robot on the bases of proximity sensor and pneumatic actuator. The shuttlecock-wielding arm has functioned properly with a success rate of 100%, while the achieved hitting rate was 70%.
Basic communication skill drill in microteching context to improve the teching skills of civil engineering and planning education students, faculty of engineering, Yogyakarta State University
Authors: Suparman  , Slamet  , Pratama GNIP
Published: June 2019

This study aims to investigate whether the drill method (verbal and non-verbal communication skill drill) is able to improve the basic teaching skills in microteaching context. This is classroom action research. The population consisted of students majoring in Civil Engineering and Planning Education Department, Faculty of Engineering, Yogyakarta State University who were taking microteaching practice course. The sample of the study was class A1 consisted of 11 students. The study was conducted in three cycles. Cycle 1 contained basic verbal communication, cycle 2 encompassed basic non-verbal communication, and cycle 3 covered both basic verbal and non-verbal communication types. Observation and skills assessment sheets were employed. The qualitative descriptive and descriptive statistics methods were then used to analyze the data.The results show that: (1) basic verbal communication skill drill in microteaching practices improves student teachers’ basic microteaching skills and (2) basic non-verbal communication skill drill in microteaching practices improve student teachers’ basic microteaching skills.
Home-made PLC laboratory training set for limited budget vocational education institution
Authors: Sunomo  , Asmara A
Published: June 2019

The objective of this study is to build a low voltage three phase 24/41-volt programmable logic controller (PLC) lab. experiment training set for vocational education institution with limited budged. The training set is very cheap, durable and save from electric shock hazard due to no other and no higher voltage used for running it. The 12 I-O PLC unit using ATMEGA 16 processor, programmed by LD micro ladder diagram software on the laptop connected to the PLC module. The loads are: two units three phase motor modified from washing machine motor with specific designed, three phase electronic magnetic contactor, three modified motorcycle bulb lamp and one buzzer. The training set equipped with two version protection; electronic phase failure for the three phase source and electronic fuse destroyer in every unit module. The 24/41 volt three phase source will be blackout one second after one of the 8 ampere three phase fuse become off by overload condition or destroy due to a wrong connection of the individual module from phase to neutral (24 volt) become phase to phase(41volt). The evaluation result from the three internal department of PLC programmer expert and five vocational secondary school (SMK) teachers in Yogyakarta shows that the unit works well as it intended.
3D aerosol printing of new low-temperature ceramic layers and coatings based on polyaluminosilicates filled with highly dispersed fillers used in microelectronics and medicine
Authors: Ivanov A A , Polyushko V A
Published: June 2019

A new low temperature ceramic material for 3D printing based on polyaluminosilicate has been synthesized. Some of the synthesis stages are controlled by the parameters set for 3D aerosol printing. The processes of 3D aerosol printing of polyaluminosilicates filled with a highly dispersed filler have been studied. An optimal method for aerosol generation has been chosen that does not affect the supramolecular structure of a polyaluminosilicate binder. Ceramic dielectric topologies with high thermal conductivity and layer thickness in the nanometer range have been obtained by means of 3D aerosol printing of the synthesized material for the first time.
Model of fuzzy estimation of mechanical stress concentration for aerospace and industrial flat structures with polygonal holes of uncertain curvature at rounded corner points
Authors: Vyskub V G , Mutina E I , Storozhev S V , Storozhev V I
Published: June 2019

The problem of uncertainty factor management in the description of mechanical stress nearby hatchways of multilateral form with rounded corners of fuzzy curvature in stretch thin plate is considered. Numerical and analytic methodology based on heuristical principle application of extension to transition to fuzzy set arguments in special analytical representations for estimated factors of stress concentration is proposed. Algorithm of fuzzy interval parameter spread of curve in corner points is described. Usage of proposed methodology in theoretical and applied researches on integrity problems of multiply connected thin-walled structure elements is characterized.
Decrease in mechanical properties, transient brittleness temperature, fatigue strength and corrosion resistance of Fe-C alloys
Authors: Ermakov Boris , Vologzhanina Svetlana , Bobrovskij Sergej , Ermakov Sergej , Kanatnikov Nikita , Khaimovich Alexander , Melnik Jurij
Published: June 2019

The paper presents the results of studies on the availability and resistance to brittle fracture of perspective austenitic chromium-nickel-manganese cryogenic steels, depending on the concentration and ratio of the nitrogen and vanadium content. The optimum content of these elements in deformed steels determined, the results of the studies and recommendations on the doping system are confirmed by the results of full-scale tests of low-temperature equipment under internal pressure in liquid nitrogen.
Flow with heat transfer in a rotating cavity
Authors: Zuev A A , Arngold A A , Tolstopyatov M I , Khodenkova E V , Nazarov V P
Published: June 2019

An integral relation of the temperature spatial boundary layer energy equation, which allows integration over the surface of any shape to determine the thickness of the energy loss, was obtained. The equations for determining the energy loss of the temperature spatial boundary layer thickness are necessary to determine the local heat transfer coefficients for the characteristic cases of flow, taking heat exchange into account. The corresponding flows in the power unit cavities are considered. Turbulent flows of a gaseous flow were considered. Calculations for local heat transfer coefficients are defined. The local heat transfer coefficient for a rectilinear flow, a rotational flow according to the law of a solid, and a rotational flow according to the law of a free vortex were determined. Calculations for local heat transfer coefficients are defined as Stanton Criteria.
Durability prognostication of ferroconcrete structures on the basis of neural indistinct networks
Authors: Tkalich S A , Taratynov O Yu
Published: June 2019

The paper considers possible application of modern prognostication techniques as an element of a quality control system. Applied mathematical tools are the artificial indistinct neural networks with the inverse distribution of a TSK type architecture error. The analysis is made of the factors influencing the ferroconcrete durability. The selected input characteristics are: the sand fineness module, the number of of a lamellar and needle-shaped grains in crushed stone, cement volume weight, of a cement stone strength. The output parameter is the arithmetical mean value of the destroying force by the results of three experiments. The MS Access database was formed on the basis of the laboratory logbooks of the production input control. Two groups of tuples are formed: for training of indistinct neural network and for adequacy tests of the trained network. Mathematical model showed the efficiency of testing. The average error value was 9.6 kg/cm2 or 2%.
Method of crack-free laser writing of microchannels on glass substrates
Authors: Baev Sergey , Bessmeltsev Victor , Goloshevsky Nikolay , Katasonov Denis
Published: June 2019

Approaches to the problem of the formation of microchannels of arbitrary shape on optical glass substrates and other fragile materials without microdefects (cracks and chips) both on the surface of the substrate and inside the substrates are considered. Different approaches to the formation of laser beam trajectories within microchannels are considered. It was found that the raster scanning method improves the performance of the laser micromachining process and provides the ability to write structures of any length without longitudinal cracks with the energy characteristics of the laser spot in the focus much higher than those in the vector scanning method.
The influence of the melt cooling rate on shrinkage behaviour during solidification of aluminum alloys
Authors: Deev V B , Prusov E S , Shunqi M , Ri E H , Bazlova T A , Temlyantsev M V , Smetanyuk S V , Ponomareva S V , Vdovin K N
Published: June 2019

A comprehensive analysis of the shrinkage process during the crystallization of aluminum alloy castings was carried out. An assessment was made of the general nature of changes in filtration and shrinkage rates, as well as the width of the mushy zone, depending on the rate of crystallization of the melts. An analytical expression was proposed for determination of the critical value crystallization rate of the alloy from the standpoint of the probability of hot tearing in castings. The method of influence on crystallizing melts by vibration with the aim of reducing hot tearing is considered and experimental data confirming the effectiveness of this approach are given.
Russia and Kazakhstan cooperation in the aerospace industry to expand geospatial information use
Authors: Kovalev Igor V , Voroshilova Anna A , Piskorskaya Svetlana Yu , Seitov Bolat A
Published: June 2019

The problems and prospects of cooperation between Russia and Kazakhstan in the space industry are revealed, the significance of Baikonur and «Vostochny» cosmodromes in this process is revealed. The concepts of geospatial information, earth remote sensing data, trends in the spread of space research in various spheres of society are considered.
Modernization stages of the Industry 3.0 company and projection route for the Industry 4.0 virtual factory
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Zharinov O O
Published: June 2019

The task is to create the Industry 4.0 company functioning on humanless and paperless principles of production. There are two ways how to complete this task. The option number one is to modernize the existing companies of the Industry 3.0 which means a smooth implementation into informative and production infrastructure of the company the components and technologies which guarantee a slow evolution of research and development institute and item designing companies. The option number two, the example given, is based on solution on some project tasks to choose the components and technologies in their iterative form. There is a scheme how to modernize an Industry 3.0 company and the expected results which allow to project with existing companies new digital factories and smart factories of the Industry 4.0. There is a route how to project systematically a virtual factory of the Industry 4.0 as the main company to support all stages of the item life cycle for different industries. Modernization quality criteria for project and production companies and creation of virtual factories define the economic criterion of company activity.
The projection of cyber and physical systems digital twins in the stage of production technological preparation of the Industry 4.0 smart factories
Authors: Zakoldaev D A , Gurjanov A V , Shukalov A V , Zharinov I O
Published: June 2019

The task is to create a cyber and physical system digital twin. Cyber and physical systems digital twins are components of the Industry 4.0 smart factories and is done with cloud services (resources) of digital production. The projection of cyber and physical systems digital twins is done in the stage of new type item technological production preparation (putting the item into production). If this is a wide cyber and physical system its digital twin is created in the digital factory and is part of cyber and physical system supply. The projection of digital twin must be done in connection with the physical part of this system projection. There is a scheme how to project the physical part of cyber and physical system. There is also a scheme how to project a virtual component of cyber and physical system (digital twin). The scheme base for the virtual component is the control program (information resource) and a set of clouds to automatize the project activity.
Features of the rotor dynamics of knife refining machines
Authors: Vikharev S N
Published: June 2019

The paper researches the features of the rotor dynamics of knife refining machines. The rotor of these machines turns in the pulp. The total imbalance of the refiner rotor consists of mechanical, hydraulic and hydrodynamic components. The mechanical imbalance of the refiner rotor changes due to the plate wear. In the knife refining machines, it is advisable to use automatic balancing devices to compensate for the imbalance of the rotor during operation of the refiner without stopping it. The methodology for calculating the beats of the rotor plate has been developed and tested. The operational cross-knife gaps of the knife refining machines are comparable to the beats obtained. It is recommended to eliminate gaps in the design of the rotor assembly, i.e. use bearings with tensioner and use a stator to make refiner adjustment. The developed methodology for calculating beats can be used in other similar machines, for example, in centrifugal pumps.
Conformity assessment of information on crushing equipment for agricultural raw materials: consequences of the lack of appropriate standards
Authors: Sekatskii V S , Merslikina N V , Pikalov Yu A , Morgun V N
Published: June 2019

The paper reviews the analysis of information about hammer (rotary) crushers for the production of compound feedstuff. It is shown that for the majority of crushers studied, the information is incomplete or unreliable, which is misleading for consumers purchasing this equipment. Measures to improve the quality of information on crushing equipment are proposed.
The strength of sawdust concrete, produced without mineral aggregates
Authors: Dolmatov S N , Nikonchuk A V , Martynovskaya S N
Published: June 2019

The construction industry widely uses concrete for various purposes. The addition of lightweight fillers to the compounding of concrete allows to obtain lightweight concrete with high heat-insulating indicators and a smaller mass. Various materials can be used as fillers, including industrial waste. The paper is devoted to the study of the properties of lightweight concrete with the addition of sawdust. As a result of experimental studies, the strength properties of sawdust concrete produced without the use of mineral fillers (sand) were determined. The positive effect of tempering the mixture with latex emulsion on the strength properties of sawdust concrete has been established. The strength characteristics of samples made with the addition of a latex emulsion were 3.65 MPa at a density of 1080 kg/m3. Such indicators allow using the material as a structural thermal insulation during construction.
Actual technical condition assessment of mine excavators’ slewing gear based on the operating oil parameters
Authors: Kudrevatykh A V , Ashcheulov A S , Ashcheulova A S
Published: June 2019

During mining equipment operation, great attention should be paid to durability and reliability increase of their units and assemblies, since the greatest number of equipment failures in Kuzbass mines occurs precisely because of the failure of excavators’ slewing gears. Today this very problem is relevant for coal mining enterprises. One of the ways to improve the reliability of gears is the introduction of additional technological processes to diagnose the mechanisms actual technical condition of an excavator-automotive complex. However, the equipment and methods used do not fully meet the requirements for a comprehensive analysis of the technical condition of gears. Thus, there is a strong need to develop a modern technique to diagnose assemblies, based on the parameters of the operating oil. With the help of experimentally identified dependencies of the oil temperature in a gear on the parameters of the operating oil, a mathematical model of the wear process of slewing gears rubbing parts was obtained; the mathematical model has the possibility to predict possible failures of excavators. The introduction of this model in production will significantly reduce the downtime of mining equipment in coal mines; it also will affect the reduction of total costs of enterprises.
Digital production management methods of radio-electronic industry
Authors: Petrushenskaya A A , Korshunov G I , Smirnov S A
Published: June 2019

During the past decade the methods of Industry 4.0 became widely spread in many areas. Radio electronic industry is not an exception in this process. Nowadays methods of digital manufacturing are gaining the particular significance in this industry. These methods propose elaboration of models of products and processes and their further simulation-based optimization. In this paper an analytical model has been developed for detailing the manufacturing process of electronic products. The model allows to determine the technical level of the projects in radio electronic industry with respect to production cycle stages: manufacturing, assembly, testing. The significant part of this model is coefficients that imply the complex assessment of projects parameters: laboriousness, material consumption, capital and quality. These indicators could be employed in the process of simulation-based optimization of products and technological processes.
Increasing the level of control and management of arc steel-smelting furnaces
Authors: Martynova E S , Bazhin V Yu , Kharazov V G
Published: June 2019

The urgent problems of modern steel-making devices are considered on the example of ASSF-90 arc steel-smelting furnace. The analysis of modern methods for controlling the parameters of arc steel-smelting furnaces is performed, the main shortcomings of the methods used are diagnosed. Laboratory studies of the parameters of arc steel-smelting furnaces were carried out, as a result of which the dependences of the temperature parameters of the furnace during different periods of melting were revealed. Based on the data obtained, an algorithm for controlling an electric steel-arc furnace has been developed and a computer program has been written. A project has been proposed for introducing the program into an existing SCADA system at one of the modern Russian electrometallurgical facilities.
Development of a computational mesh generator for the OpenFOAM software environment used at industrial enterprises
Authors: Chitalov Dmitri I , Kalashnikov Sergey T
Published: June 2019

The paper is devoted to special features of the development of an application with a graphical user interface to prepare computational meshes (CMs), when performing numerical simulation based on the OpenFOAM software environment (SE), used at enterprises of missile engineering, automobile industry, engine building, shipbuilding and other industries. OpenFOAM, if used, permits successfully conducting numerical simulation in the phase of engineering of finished goods through 3D modelling of deformable solids, investigation of their characteristics, when interacted with liquid and gaseous media, and also study of mechanics of deformable solids that correspond to the models. The paper provides the comparative characteristics of available software with a graphical user interface mainly used to prepare CMs and the revealed drawbacks of the software. The urgency of an issue is highlighted, special features of the development of the new application are given. The study scientific novelty that lies mainly in the enlargement of a list of types of CMs available for preparation through a graphical user interface, and possible operation with any number of mesh models in one OpenFOAM case, is defined. The program has a certificate №2018616380 dated May 30th, 2018 on registration by Federal Institute of Industrial Property.
Control system for thiosulfate leaching of intermediate industrial products in metallurgy
Authors: Kazakovtsev L A , Kustashev P A , Polyakova A S , Popov A M , Panfilov I A
Published: June 2019

The efficiency of the process of thiosulfate leaching of intermediate industrial products depends on the composition of the incoming raw materials, the operational control of which is impossible. In this paper, we propose upgrading of the process control system which allows reducing the downtime of the process equipment.
Neural network classification of surface quality after hard turning of 105WCr6 steel
Authors: Rastorguev D A , Sevastyanov A A
Published: June 2019

The paper presents the results of a surface quality study after hard turning on a CNC lathe. Ring workpieces made of 105WCr6 steel and hardened to HRC 55 are used in this work. Data was obtained on surface quality and type of chips in a three-factor experiment for end face cutting. In order to assess the surface quality, it was photographed on an optical microscope with 4, 10, 40 times magnification. The surface quality was evaluated by traces of processing and divided into three types: the absence of moire, a clear moire, and an intermediate type of surface. The chip morphology was divided into the following categories: discontinuous, snarled and ribbon chips. To predict both parameters for different cutting conditions artificial neural networks (ANNs) were used. Different ANNs are applied to achieve the best classification results. In this work probabilistic neural network (PNN), feedforward network and learning vector quantization (LVQ) network are used. The results of modeling all networks are similar and can be used for technological preparation of production.
Criteria for the process of drawing copper microwire for electronics
Authors: Volkov A V , Sokolova I D , Korzhavyi A P , Beckel L S
Published: June 2019

The paper provides information on the use of the developed mathematical model of repeated drawing with the sliding of a microwire from copper, intended for the installation of intracircuit electrical connections of microcircuits. Creation of a microwire based on copper for internal electric contact connections is a complex task: in the world practice, only a few firms can produce such a material that fully meets the requirements of the microelectronic industry. To obtain the specified microwire, it is necessary to work on the creation of high quality micro-alloyed copper; make a serious adjustment of the process of obtaining microwires, taking into account the complex of physical and chemical properties of the material. The article defines the criteria for the stability of the process of drawing during modelling, suitable for designing transitions of diamond dies. An analysis of the slip drawing process criteria, the safety factor of the drawing transitions, and the peripheral speeds of the pulls and wires to ensure the selection of both theoretically accepted and actually specified transitions of diamond dies is given. Based on a preliminary analysis of the model, recommendations are presented for its further improvement with the use of the criteria for the stability of the drawing process in order to increase the reliability of the process of obtaining a copper microwire for electronics.
Problems of ensuring accuracy in the manufacture of large-sized thin-walled parts
Authors: Zhilyaev A S , Kugultinov S D , Efremov S M
Published: June 2019

The manufacture of large-sized thin-walled parts is a complex, time-consuming and high-tech process, as practice shows. The result of production does not always meet the requirements of the design documentation, which leads to the exclusion of parts from further production and the loss of time spent by a team of specialists and workers. The paper analyses the occurrence of defects leading to faults. It identifies the direct and indirect causes of their occurrence, suggests ways to eliminate them using the control parameters of the technological system: tool path in the control program, cutting conditions, cutting tool geometry. The proposed recommendations, tested in the production process, have significantly improved product quality and reduced production preparation time.
Energy recovery method of damping oscillations of the vehicle suspension
Authors: Okladnikov D L , Zeer V A , Grazhdantsev E V , Avdeev R M , Akhremov S A
Published: June 2019

The paper analyses the existing methods of energy recovery of vehicle suspension oscillation damping. It reveals the most preferred method in which an electromagnetic device of rotational type with a ball screw gear is used. The influence of the road parameters on the dynamic loads in the drive of an electromechanical generator is determined by mathematical modelling.
The analysis of the industrial safety providing and processes control multifunctional system via use of a hybrid modeling methodology
Authors: Nasibullina T V , Shornikov U V
Published: June 2019

This article proposes the analysis of the multifunctional safety providing and process control system of a coal mine for the purposes of a hybrid modelling, provides the elements of the system at various abstraction levels, defines the goals and objectives of the modelling, and shows the practical significance of the work. The “Smart Mine®” system’s personal positioning function considered as an example, the analytical and formal models of the system are provided. The utility of hybrid modelling for high-responsible systems’ end-to-end design and for emergency prediction is shown.
Parametric synthesis of system of transmission of motion to links of anthropomorphic gripper of variable structure
Authors: Zhdanova Yu I
Published: June 2019

The article is dedicated to issues of designing an anthropomorphic gripper (AG) made from actuating link groups (ALG) possessing kinematics similar to human fingers kinematics. The ALG option with the number of output links exceeding the number of motors is being considered. The general drive of links using motion transmission system (MTS) of variable structure is realized. The accepted method of MTS construction provides development of a new feature that is adaptability of the location of links to the profile of the grasped object surface. MTS may be constructed using leverage, rope and combined mechanisms. The transmission of high force is realized by leverage mechanisms. Its special feature is significant number of projected parameters. It determines the necessity of solving a problem of MTS parametric synthesis in optimization performance. The maximal force on the ALG output links at the end positions is proposed to be used as an optimality criterion. The restrictions placed on an optimality criterion and terms of similarity to finger phalanges motion are determined.