bluuebunny/crossref_metadata_2025_split huggingface dataset:
Speed estimation of the three-phase induction motor with Volts/Hertz control using artificial intelligence techniques
Authors: Salamanca J E , Diaz Rodriguez J L , Pardo Garcia A 
Published: December 2020

Abstract
This paper deals with the design and development of a prototype for speed estimation of a three-phase squirrel cage induction motor using Volts/Hertz control. The speed estimation was using an embedded electronic device with an adaptive neuro-fuzzy inference system. In this way, it is expected to increase the reliability of the rotor speed measurement. For the estimation, the currents and voltages that feed the induction motor were taken as input data to training an adaptive neuro-fuzzy inference system. Additionally, a Volts/Hertz control technique was used to test the operation of the estimator at different operating speeds, comparing the estimation with a speed sensor coupled to the machine shaft. The estimation was supported on a Raspberry Pi 3B hardware. The algorithms were developed using Simulink, which allows a graphical block interface that facilitates the understanding of the system. For the power stage, a multilevel converter was developed, thus, ensures a low total harmonic distortion.
Study on the Integration of Flue Gas Waste Heat Desulfurization and Dust Removal in Civilian Coal-fired Heating Furnace
Authors: Zhou Gang , Zheng Haorun , Zhu Xiaopeng , Liu Yuemei 
Published: December 2020

Abstract
To put the policy of civil coal governance environment, the clean and efficient use of technology and civilian cainuanlu practical application within consideration, this paper designed a set of flue gas desulfurization dust removal integration of recovery of waste heat from flue gas treatment system, in order to achieve the recovery of waste heat of flue gas and reduce cainuanlu particulate matter and sulfur dioxide emissions. The flue gas treatment system mainly used the structure of the spiral coil heating and stainless steel tube, and will recovery the smoke waste heat ; There are three dust removal processes: the strainer mesh filtration of the entire unit, adsorption of modified activated coke and water spray cleaning; Desulfurization part was designed to operate the easy drawer cabinet structure, using the modified adsorption properties of activated coke processing SO2 in flue gas. The experimental results show that the processing system of dust removal and desulfurization efficiency is at 80%.
Wellbore Stability Mechanism and Countermeasures of Igneous Formations in Shunbei Oilfield
Authors: Zhong Wenjian , Yu Yang , Liu Jingtao , Li Shaoan 
Published: December 2020

Abstract
Shunbei oilfield is located in the Midwest of Tarim Basin. Since 2018 many wells in the block have encountered broken formation, directional wells wellbore collapsed seriously, resulting drilling sidewells, with a huge loss of drilling costs. The influencing factors of igneous formation stability include internal and external factors. The internal cause refers to the formation instability caused by the strength anisotropy and strong in-situ stress nonuniformity of igneous formation. The external cause refers to various factors that cause the change of the external environment of the formation caused by drilling engineering, including the physical and chemical interaction between the drilling fluid and the formation, well trajectory and mechanical disturbance of the drilling string, etc. Based on the analysis of the influencing factors of wellbore stability in igneous rock, the technical countermeasures of wellbore stability in igneous rock formation are put forward and field tests are carried out. In the Permian fractured formation of Shunbei oil field,the idea of “prevention first, combination of prevention and blocking” is adhered to the first principles. Low density and low viscosity drilling fluid with low displacement is adopted to prevent the occurrence of lost circulation. The wellbore of the igneous rock intrusion in santamu formation of Ordovician is easy to collapse. By adopting special sealing structure and strengthening plugging and anti-collapse, combined with slurry plugging and well washing and refining engineering measures, the safe drilling of the igneous rock can be ensured.
Research Status of Spinel LiMn2O4 Cathode Materials for Lithium Ion Batteries
Authors: Zhang Yaqing , Xie Hongyan , Jin Huixin , Zhang Qiang , Li Yezhu , Li Xiaohui , Li Kaifeng , Bao Chongjun 
Published: December 2020

Abstract
As a new type of green power system, lithium ion battery has been widely developed in the field of new energy. Lithium manganese oxide has become a hot topic due to its low price, safety and pollution-free properties. In this paper, the research progress of positive electrode material LiMn2O4 for lithium ion batteries in recent years is reviewed, in addition, the structural properties, synthesis methods, existing problems and modification aspects of the material are described.
Blockchain Technology Enables Fixed Assets Investment Statistics
Authors: Wen Fan , Ma Lei , Qian Xiao , Song Hongfang , Weng Geping , Jiang Hao , Cui Qinyue 
Published: December 2020

Abstract
Blockchain technology is a kind of decentralized transaction and data management technology, which has been extended to many economic and social fields, such as digital finance, Internet of things, intelligent manufacturing, supply chain management, digital asset trading and other economic and social fields, but the application of statistical work is still less. The current investment statistics business of Power Grid Companies involves multi-department collaboration and multi-level interactions. There are uneven data maintenance and low data quality among various business departments. The statistics majors and the basic data providing departments and the statistical data reporting units are both at the upper and lower levels. There are varying degrees of “mutual trust issues”. According to the characteristics of blockchain Smart Contract, consensus mechanism and linked storage structure, multi-party sharing of data on the chain and higher credibility, this paper explores how to integrate the technical characteristics of blockchain with the investment statistics business, and change the business model of investment statistics.
Research on strip pressure relief drainage technology in deep coal roadway
Authors: Sun Luanluan , Wang ZHonghua 
Published: December 2020

Abstract
Aiming at the characteristics of coal and gas outburst disasters in Jianxin Coal Mine, based on the compound energy mechanism of coal roadway outburst in deep mining and the distribution law of the roadway surrounding rock fracture zone, the pre-drilling pressure relief floor rock roadway and the cross-bed borehole drainage coal road way g as a r e p r o pos ed. Regi o n al anti-outburst measures have been applied in engineering. The application shows that this technical measure can greatly improve the permeability of the coal seam and the effect of pressure relief extraction, and ensure the safe and rapid excavation of coal roadways.
Ecological and biological adaptations of the hemiparasite Odontites luteus (L.) Clairv. (Orobanchaceae) on the territory of the conservation stow “Levadki” Oak Grove (Russia)
Authors: Prosiannikova I , Bodko D 
Published: December 2020

Abstract
The abundance of Odontites luteus (L.) Clairv (Orobanchaceae) was studied on the territory of the conservation stow “Levadki” Oak Grove (Russia). The average species abundance was 11.75 ind./m2 on the study area during the growing season. The phenological phases of the plant hemiparasite were studied, the indicators of seed productivity and the efficiency of its fruit formation were examined. O. luteus, being an annual plant, forms a significant number of flowers and fruits within a single specimen (the average number of seeds is 1,930). The specific affinity of the semi-parasite to the host plants has been studied.
Adjustments to the method for assessing the phytosozological status of the specially protected natural areas
Authors: Saxonov S V , Senator S A , Koneva N V 
Published: December 2020

Abstract
The study determines the criteria, allow quantifying the phytosozological (conservation) status of the specially protected natural areas. We distinguished 10 such criteria that reflect the diversity of vegetation cover and allow assessing the necessity of conservation for the specially protected natural areas. Among them: (1) the degree of the study of the vegetation cover, assessed by the number of published literature sources; (2) a reference (demonstration) value, an integral indicator that considers, on the one hand, the typicalness (reference value), on the other hand, the uniqueness of the vegetation cover. The following points must be taken into consideration: the presence of relict and endemic species of plants and plant communities in the study area; classical territories (relevés) of the first descriptions of taxa and syntaxa new to science; the diversity (in terms of numbers) of landscapes and types of vegetation, or plant associations; (3) the area of the territory, estimated according to reference materials; (4) man-impact tolerance of the vegetation cover, based on generally accepted concepts of primary, secondary (demutation) successions and the climax theory; (5) coenotic diversity, evaluated by the presence of the vegetation types or the number of studied plant associations; (6) general species diversity of the vascular plants, quantified by the number of registered species of vascular plants; (7) the number of species included in the federal Red List; (8) the number of species included in the regional Red List; (9) the degree of transformation of the natural territorial complex (landscape) assessed by the state of conservation of indigenous vegetation and disturbance of the lithogenous basis; (10) the restoration potential estimated by the ability (intensity) of the vegetation cover to recover after the anthropogenic load has been removed. Phytosozological status is an integrative indicator reflecting the current degree of conservation of the vegetation cover and the probability of its existence in near future. The conservation status is determined by simple arithmetic addition of the criterion points in accordance to the suggested original scheme.
Karst Lakes of Mari Chodra National Park: stratification and vertical distribution of phototrophic plankton
Authors: Yu Gorbunov M , Umanskaya M V 
Published: December 2020

Abstract
The characteristics of micro-scale vertical heterogeneity of physicochemical parameters, photosynthetic pigments’ content and populations of phototrophic microbial plankton in four karst lakes of the Mari-Chodra NP (rep. Mari El), the Bolshoy Kichier, Cherny Kichier, Shungaldan and the Blue Oxbow, are presented on the basis of summer surveys of 2006, 2007 and 2009. According to our data, two lakes, Shungaldan and Cherny Kichier are, meromictic waterbodies of crenogenic type; the Lake Bolshoy Kichier is holomictic with stable summer stratification and anoxic hypolimnion. The Lake Blue Oxbow occupies an intermediate position, and, apparently, is irregularly mixing. The physicochemical conditions and composition of the phototrophic plankton communities of the chemocline zone of the two previously studied lakes, Bolshoy and Cherny Kichier, have remained stable over the past 20-35 years. Significant development of anoxygenic phototrophic bacteria was found in two lakes in which data on their development were previously absent. In the bacterial plates of meromictic lakes, the concentration of bacteriochlorophyll d, the pigment of green phototrophic bacteria, reaches some mg per liter.
A Unified Interface Library Open-IES-Sim Platform
Authors: Qiu Jun , Wang Rongli , Fang Yunhui , Ge Kailiang , Zhang Li , Xu Boya , Zhou Suyang , Zhou Ying 
Published: December 2020

Abstract
In the future, integrated functions and energy internet will become the direction of smart energy development. This puts forward requirements for power flow calculation and simulation of combined heat and power supply and unified modeling. Due to the complexity of the tespy heat network equipment model, the lack of node modeling corresponding to the power flow calculation model brings difficulties to the simulation modeling of the unified power and power flow calculation. Therefore, it is necessary to unify the interface of thermal network and power flow calculation model. Based on the tespy and pandapower libraries, this paper unifies the interface functions of heat network and power grid power flow calculation modeling, constructs a unified interface library Open-IES-Sim platform and builds a coupled power flow calculation process method and corresponding visualization results display program. The corresponding open source example is given. It is convenient for the future use of scientific research workers who need thermal and electrical coupling modeling and the demonstration research in education and teaching.
A CMAQ-based Study on Evaluation of Achievements of Measures on Ozone Pollution Prevention and Control in Summer 2017 in Chengdu
Authors: Liu Hefan , Deng Ye , Lu Chengwei , Zhang Xin , Yang Xinyue , Song Danlin , Tan Qinwen 
Published: December 2020

Abstract
Ozone Pollution is one of the major difficulties in improving the air quality of Chengdu. In 2017, on the basis of research findings including a mass of observation data, meteorological data and numerical simulation data of air quality on the localized ozone and its precursors in Chengdu, Chengdu Environmental Protection Bureau drew up and implemented 2017 Chengdu Ozone Pollution Prevention and Control Action Program (OPCAP). This study elaborated on the specific measures of OPCAP and the subject of implementation of the said measures, and based on the localization of CMAQ parameters, conducted scientific evaluation on the achievement of OPCAP implementation. The research findings are set forth as follows: OPCAP made pollutants reduced to a large extent, for example, the industrial emissions of VOCs and NOx were reduced by 8600 tons and 2150 tons, respectively. Compared to the corresponding period of last year, in August 2017, meteorological change made O3max, PM10, PM2.5, NO2 and CO reduced by 34.9%, 24.2%, 23.9%, 16.6% and 6.0%, respectively. After a series of measures including OPCAP were taken, O3_8h max was reduced by 6∼10μg/m3 in most areas of Chengdu. Under equal meteorological conditions in August 2017, OPCAP made O3_8h max in the downtown of Chengdu reduced by 3.67% on average, and the concentration of NO2, SO2, PM10, PM2.5 and CO was reduced by 25.00%, 11.11%, 19.59%, 19.63% and 5.32% on a monthly average basis. As shown above, it can be seen that OPCAP worked on ozone pollution prevention and treatment. The technologies adopted in and the findings of this study may provide technological guidance on the mid-term and long-term ozone pollution prevention and treatment.
Research on UAV Aided Earthquake Emergency System
Authors: Zhao Jie , Yang Wenjing , Wang Feijian , Zhang Congcong 
Published: December 2020

Abstract
As a hot technology in the industry, UAV can play a role in all aspects of earthquake emergency system. In view of the scene of earthquake emergency, according to the characteristics and latest development of UAV, combined with its application in various kinds of natural disasters in recent years, it discusses the design of UAV aided earthquake emergency system. The UAV aerial image processing subsystem focuses on the disaster condition collection, earthquake intensity evaluation and thematic map production after the earthquake. The UAV on-site rescue subsystem focuses on the materials transportation after the earthquake, personnel searching and rescuing, and command and dispatching. The tethered UAV emergency communication subsystem mainly provides emergency communication support after the earthquake. The UAV image return subsystem is designed to deliver images of disaster areas to headquarters and the public, so that they can have an intuitive and vivid understanding of the disaster situation, rescue force deployment and rescue progress in the disaster areas.
Intelligent diagnostics and control of 3D printing processes by electric arc surfacing of workpieces made of cold-resistant materials on a CNC machine using machine learning approaches and neuromorphic calculations
Authors: Shatagin Dmitrii , Kabaldin Yuri , Anosov Maksim , Colchin Pavel 
Published: December 2020

Abstract
The article discusses a method for diagnosing and optimizing the dynamic state of an electric arc during 3D printing of workpieces from cold-resistant materials on a CNC machine within the framework of a cyber-physical system. The possibility of applying nonlinear dynamics methods to assess the stability of the 3D printing process and artificial neural processes for classifying and optimizing the parameters of the dynamic state of the 3D printing process is shown. Experimental studies of the cold resistance obtained by 3D printing of 09G2S steel samples were carried out taking into account the choice of optimal modes.
Application of additive technologies for manufacturing a wear-resistant steel pipe outlet
Authors: Sedykh L V , Albul S V , Efremov D B , Sukhorukova M A 
Published: December 2020

Abstract
The paper analyzes the problems of exploitation of pipe outlets for the oil and gas industry and describes the special design of the outlet’s vane, which allows to extend its service life. However, this special shape of the vane requires new manufacturing technologies. The paper lists the technical requirements for the finished model of the outlet and the method of its manufacture. Based on them, an analysis was carried out, and has been proposed the application of additive technologies for the manufacture of a steel pipe outlet with the vane, namely, the method of Selective Laser Melting (SLM). The advantages and particularities of the method’s application are described, as well as the stages of the manufacturing process for manufacturing an outlet with a special shape of the vane.
Study of FDM technology applications in the casting production of GTE details
Authors: Balyakin A V , Vdovin R A , Kyarimov R R 
Published: December 2020

Abstract
FDM is an additive manufacturing technology that can be effectively used to make investment casting models. This method is considered economical in a single production, since it does not require the manufacturing of expensive equipment. However, the roughness of models surface made by FDM printing is significantly lower than wax models obtained by traditional way - using metal and elastic silicone molds, that ultimately affects the roughness of castings. In this work, was studied the use of FDM printing technology for materials: REC CAST, PVA and Wax3D from company the “Filamentarno!”, used in molds to obtain models, as well as a combined method for wax models production. FDM printing technology is especially suitable for producing models with internal channels and cavities through the use of water-soluble support materials.
Formation of aluminum alloy parts with working internal cavities by selective laser melting
Authors: Voznesenskaya A A , Kochuev D A , Raznoschikov A S , Chkalov R V 
Published: December 2020

Abstract
The great difficulty in synthesizing parts by selective laser melting lies in the formation of high-quality internal surfaces of workpieces. High quality is understood as the absence of defects in the form of shells, pores, partially fused powder granules, forming a rough surface. This task is especially relevant when obtaining parts by selective laser melting of aluminum alloys powders. The main problem is the great complexity or impossibility of their mechanical post-processing. Thus, in the manufacture of parts with working internal cavities used for the flow of liquids and gases, the presence of defects is completely unacceptable. In this paper, we studied the formation of defects in the internal surfaces during the process of obtaining objects by selective laser melting, in particular, the sticking of granules of powder material on the formed surface under various processing conditions. Variable parameters were scanning speed and laser radiation power. Data on the behaviour of the growth of a multilayer object depending on the variable parameters are obtained. The groups of samples of different shapes obtained under different melting conditions are considered.
Efficiency of applying advanced electromagnetic pulse processing when turning polymer composite materials
Authors: Erenkov O Yu , Lopushanskii I Ya , Yavorskii D O 
Published: December 2020

Abstract
The new approach to high-performance turning of polymeric composite materials is presented in this paper. The approach essence is a combination of a conventional work pieces turning with simultaneous irradiation by nanosecond electromagnetic pulses. As a result the changes of studied material structure occur that lead to technological softening the work pieces surface layer. It has been experimentally proved that irradiation of the studied materials with nanosecond electromagnetic pulses for 5 and 10 minutes leads to a noticeable decrease in the strength and hardness of all samples. On the basis of the experimental data the new turning methods for polymer composite materials and the device for its implementation have been developed and patented. Analysis of the experimental studies data allows us to conclude that such approach leads to decreasing in cutting force during work pieces subsequent turning and, therefore to increasing in the process productivity, for example, due to increasing cutting speed or size of the removed allowance.
Technology of extending operational life of multifaceted disposable plates
Authors: Nosov N V , Balakirov S N 
Published: December 2020

Abstract
The article presents the results of the development of MDP remanufacturing technique. The problem statement is related to the improvement of durability, strength and performance properties of MDP. Remanufacturing technique of plates provides the development of the process scheme for the resharpening of MDP along the front surface and application of TiN wear-resistant coatings. The optimal geometry of the restored tool, the sharpening scheme, the characteristics of grinding wheels and cutting modes are selected. The coating technology, scheme and surface cleaning modes are developed, and the coating quality parameters are determined. Technical and economic analysis of the efficiency is carried out.
Perfection of the methodology for calculating the keyway broach through the experimental data of photomechanics
Authors: Zhed O , Kozochkin M , Kazymaeva K 
Published: December 2020

Abstract
In work by the method of photomechanics, the stress-strain state of the models of the keyway broach is evaluated. Models are made of optically sensitive organic glass of E2 grade. The aim of the research is to improve the method of calculating the keyway broach based on experimental data obtained by the photomechanics method. The effect of the radius of the transitional fillet on the stress concentration in the models of new and reconditioned keyway broaches is studied.
Determination of conditions ensuring maximum operability of replaceable hard-alloy cutting plates during blade processing
Authors: Artamonov E V , Tveryakov A M , Shtin A S 
Published: December 2020

Abstract
This study is devoted to the definition of conditions ensuring maximum operability of replaceable hard alloy cutting plates during blade processing of hard-to-process materials, with assessment of the possibility to use the tool of Russian production without loss of processing efficiency, as well as the possibility to implement adjustments of regime conditions in non-stop mode, using cloud services in enterprises with network structure, thus supporting the implementation of smart production and the fourth industrial revolution.