bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Principle of Uyghur Vowel Harmony
Authors: Kaili Binu , Mei Reyi , Yang Deming , Wang Jianbin 
Published: August 2019

Abstract
This paper aims at Uyghur vowel mutation tendency by means of Economic law of articulation. The economy principle can be easy to trace thorough evaluating Uyghur mutation. And the economy principle might have been a main factor producing the vowel harmony.
Investigation on Potential Application of Artificial Intelligence in Preschool Children’s Education
Authors: Jin Ling 
Published: August 2019

Abstract
Artificial intelligence has been rapidly developed in the past years. The present paper aims to investigate the potential application of artificial intelligence in the preschool children’s education. First, the critical technologies of artificial intelligence are reviewed and related to the preschool children’s education. Then, the demand for artificial intelligence in preschool children’s education is analyzed for children-centered learning activities, respecting children, and learning in accordance with children’s development. Finally, some possible applications of artificial intelligence in preschool education are discussed.
Climatological Averaging and Application of Optical Vegetation Index based on MODIS
Authors: Liang Jing , Lu Hanyu , Wu Song , Ding Leiding 
Published: August 2019

Abstract
In view of the problem that the inversion of soil moisture is greatly affected by vegetation coverage, this paper uses MODIS vegetation products. By eliminating the data of cloud, rain, snow and other quality damage data, the global climate mean data set is compensated by the linear interpolation method after the data average processing. The results showed that NDVI vegetation index changed regularly with seasons, and the change rule was different in different regions. The single pixel interior can accurately reflect the variation trend of the vegetation index of different pixel NDVI in one year. It can describe the seasonal variation of vegetation in the global pixel, reflect the change of green degree, and meet the need to correct the accuracy of vegetation influence.
Which Factors Have the Greatest Impact on Student’s Performance
Authors: Li Feng , Zhang Yu , Chen Mo , Gao Kening 
Published: August 2019

Abstract
Nowadays, a great deal of educational data has been produced by E-learning system and MOOC. Educational data is important for Teaching and research. These educational data can be classified many kinds of feature, such as demographic features, social features and behavioral features. And which feature is the most import for student’s performance? In this paper, In this paper, we use some common data mining technologies including Naïve Bayesian(NB), Artificial Neural Network(ANN), Support Vector Machine(SVM) and Decision Tree Classifier(DT) to predict students’ performance, and try to find out the influence of characteristics on students’ academic performance. From the conclusion, we can see that SVM technique outperform others, and Behavioral Features have good effect on students’ performance.
A Text Mining Method to Trace Influential Product Features Based on PageRank
Authors: Liu Qin , Yu Zhuchao , He Shucheng 
Published: August 2019

Abstract
As a technology of Web2.0, social media has become a popular tool for both enterprises and customers to understand other voices. Therefore, an important project for enterprises to have an outstanding feedback is to use social media to promote and spread products correctly, so it’s necessary to mine some product features which customers care mostly. In this paper, we crawled online data from website DouBan to trace those features through their posted contents, such as descriptions, reviews, comments, etc. Firstly, we computed received attention of these contents by self-information algorithm and measured similarity by cross-entropy algorithm. Secondly, using the attention value as node weight and similarity as edge weight, we computed influence of product features in PageRank network by the proposed method. Experimental results show that it is books’ authors, genres and themes that consumers consider of mostly when they choose a book commonly. Furthermore, when it comes to a novel, the feature character is also one of the focuses while other features are not as important as them. This research informs a way for enterprises to choose emphasis in an online promotion, which can be very helpful for recommending products to target customers in a proper way.
330kV Live Working Platform Design based on Minimum Approach Distances Analysis via Weighted Digraph
Authors: Liu Zirui , Qin Xuan , Zhang Dingrui , Han Yanhua , Pu Tingyan , Liang Qinghua 
Published: August 2019

Abstract
Considering the strict requirements of live working platform in compact substation, a module assembly based structure is put forward. In order to meet the demands of insulation performance, a method of calculating minimum approach distances based on graph theory is proposed, and the feasible regions of structural parameters and flow parameters are obtained, which are finally verified in experiments.
Study of Control System for Climbing Robot based on Multi-sensor
Authors: Xu Hong Bin , Xu Borun , Ding Jieyue 
Published: August 2019

Abstract
In this paper, the modular design idea and MVC design pattern are used to study a control system of a wall-climbing robot applied to detecting the surface of large-scale tanks. The design mainly has two parts:hardware system and software system. The hardware system consists of power modules, sensor modules, control modules, and communication modules. The software system is composed of the robot control software, the robot remote control App based on Android devices, and the upper computer application program which can run in both Windows system and Linux system. Finally, the feasibility and robustness of the system are verified by experiments.
Design of a single-stage Flyback LED Constant current Driving Power Supply
Authors: Xu Yingchao , Lin Jiatao , Xie Xiaoqi , Cai Chuyu 
Published: August 2019

Abstract
In order to solve the problems of high cost and low efficiency of current LED driving power supply, a single-stage flyback LED constant current driving circuit is designed. The power supply adoptes OZ8027 as the main control chip in the critical conduction mode, which uses the peak current control method. A wide range of input voltage of 85~265V is designed, the output current is 200mA, and the actual output power target value is 13W. It is suitable for an AC input type for flyback constant current driving circuit whose light source board owns LEDs for 2-series and 5-parallel. This research describes the working principle of a single-stage flyback LED constant current drive circuit. The detailed design and analysis of the various components of the driving power supply circuit. The test shows that the circuit works normally, and the output current can be obtained after testing. The current is stable at 200mA, output power is 12.7W, output ripple ratio is 1.65%, and the conversion efficiency is as high as 92.33%. The experimental results show that the designed LED driving power supply is stable and reliable, low cost, high efficiency and meets the design standards of LED driving power supply.
Physical length scales of wind-blown snow redistribution and accumulation on relatively smooth Arctic first-year sea ice
Authors: Moon Woosok , Nandan Vishnu , Scharien Randall K , Wilkinson Jeremy , Yackel John J , Barrett Andrew , Lawrence Isobel , Segal Rebecca A , Stroeve Julienne , Mahmud Mallik , Duke Patrick J , Else Brent 
Published: August 2019

Abstract
Snow thickness measurements over relatively smooth Arctic first-year sea ice, obtained near Cambridge Bay in the Canadian Arctic (2014, 2016 and 2017) and near Elson Lagoon in the Alaskan Arctic (2003 and 2006), are analyzed to quantify physical length-scales and their relevant scaling behaviors. We use the multi-fractal temporally weighted detrended fluctuation analysis method to detect two major physical length-scales from the two independent study locations. Our results suggest that physical processes underlying the formation of snow dunes are consistent and that the wind is the main process shaping the snow thickness variability and redistribution. One scale, around 10 m, appears to be related to the formation of the snow ‘dunes’, while the other scale, between 30 and 100 m, is likely associated with the various interactions of the snow dunes such as merging, calving and lateral linking. Results imply that snow on level sea ice shows self-organized characteristics.
2018 summer extreme temperatures in South Korea and their intensification under 3 °C global warming
Authors: Im Eun-Soon , Thanh Nguyen-Xuan , Kim Young-Hyun , Ahn Joong-Bae 
Published: August 2019

Abstract
With the acceleration in global warming, extreme hot temperatures have emerged as one of the most prominent risks. In this study, we characterize the unprecedented extreme temperatures that occurred in Korea in summer 2018, and attempt to explain how this locally observed extreme event can be interpreted in the context of 2 °C and 3 °C global warming above the pre-industrial level. To better resolve geographically diverse climate features and enhance confidence in future changes, three global projections are dynamically downscaled using three regional climate models that are customized over Korea and the systematic biases are statistically corrected using quantile mapping. In July and August 2018, abnormally high maximum temperatures (Tmax) were observed over the entire territory of South Korea. Beyond the increase of mean value, Tmax at individual stations departed significantly from the typical Gaussian distribution of climatological Tmax due to the dramatic changes in the extent and shape of upper tails. The distinct behaviors of Tmax that appeared in 2018 largely represent the statistical analog of the distribution pattern expected under 3 °C global warming based on fine-scale climate projections. This implies that statistically extremely rare events like that of summer 2018 will become increasingly normal if global average temperature is allowed to increase by 3 °C. More importantly, the extreme heat stress measured by the wet-bulb globe temperature is projected to intensify the risks to a level never before seen in contemporary climate. This study is timely and relevant to the need to identify how the globally aggregated warming target temperature can be disaggregated into regional impacts.
Niche theory within video platform competition: traditional vs modern
Authors: Sukwadi R , Lasiman S C , Inderawati M M W , Suprata F 
Published: August 2019

AbstractRapid proliferation of the usage of internet-based modern television (IPTV and OTT) in Indonesia as well as limited and similar resources threatens the existence of old/traditional video platforms (satellite television and cable television). Adapted from ecological studies, niche theory is used to measure the level of dynamic competition among media. Through three concepts of measurement of niche theory, niche breadth, nice overlap, and competitive superiority, the competition relationship between these four video platforms can be analyzed. The questionnaire was spread out online and offline to 502 respondents of each platform. Focus group discussions were conducted in two groups with 6 respondents each group. The results of this study were also analyzed based on the media life cycle. The conclusions of this study are: 1) OTT is a generalist platform, IPTV and cable television tend to be generalist, and satellite television is classified as a specialist; 2) The highest competition occurs between cable television and IPTV; 3) OTT is the most competitive platform whereas satellite television is the least competitive; 4) Satellite television is in defensive resistance life cycle, cable television in defensive resistance and adaptation cycles, IPTV in growth cycle, and OTT in maturation cycle.
Analysis of chemical elements of the rocks on the coastal areas in the Eastern Bolaang-Mongondow District, North Sulawesi Indonesia
Authors: Angmalisang P A , Manu L , Sangian H F 
Published: August 2019

Abstract
The chemical elements making up the rocks located on the coastal areas in the Eastern Bolaang Mongondow were successfully mapped and investigated by employing the XRF method. The rocks collected from the Central Buyat, South Buyat, Motongkat and Jiko coastal areas of the sub-districts were milled until the size was close to 120 mesh. The samples were characterized and measured to obtain the chemical elements deposited inside the rocks. It was found that the elements which make up the rocks are relatively different depending on the coastal locations. The silicon (Si) was the highest percentage of all elements found and followed by iron (Fe), calcium (Ca) and aluminum (Al). The composition of Si deposited in the rocks from Buyat coastal area was of 42.4% which the biggest percentage compared the rest of the samples. The Iron (Fe) element had a chemical composition recorded at 28.9% that was the highest figure in which rocks were obtained from Jiko coast. The aluminum (Al) composition was relatively similar for all samples collected from that location and observed at 10%.
Trophic status of Limboto lake in Gorontalo Province
Authors: Noor S Y 
Published: August 2019

Abstract
Limboto Lake were on the worried condition now. It happened because of the process depreciation and sedimentation which caused by sedimentation and waste ground that threaten the existence of ecosystem in the future. The purpose of the research is to determine trophic status of Limboto Lake in Gorontalo Province. Measurements of several water quality parameters were carried out insitu at 8 (eight) stations conducted by sampling and laboratory analysis of several parameters of water quality carried out at the Manado Research and Standardization Reasearch Centre. To determine the trophic status of Limboto Lake waters calculated using the Trophic State Index (TSI) of Carlson. The results showed that the average value Trophic State Index (TSI) of Limboto Lake range from 50.3071 – 61.9297. This shows that the trophic status of Limboto Lake waters is classified as eutrophic.
Structure formation in materials based on Fe-C-Si and Fe-C-Al systems (cast irons) prepared from dispersed mechanical engineering waste
Authors: Bikulov R 
Published: August 2019

Abstract
The paper presents fn alternative technological process for producing compact forms of graphite inclusions in the materials based on the Fe-C-Si and Fe-C-Al (cast iron) systems. It differs from traditional methods of obtaining compact forms of graphite inclusions, which consist in modifying the molten iron or annealing white iron: the proposed technological process is based on a synergistic complex of foundry-metallurgical factors affecting the cast iron in the stages of its melt preparation and crystallization in a mold.
Research of a laser welding of thin-shit construction steels by continuous laser radiation
Authors: Gabdrakhmanov Az T , Galiakbarov AT , Shafigullin L N , Gabdrakhmanova T F 
Published: August 2019

Abstract
The results of the laser welding by continuous radiation of thin-sheet low-carbon steels on the example of steel 08U presented in this paper. Metallographic studies of the laser weld were conducted. Tensile tests were carried out as a result of which it was determined that the nature of the fracture is adhesive, and after cohesive failure of the specimens, it is show the high quality of the welded joints at the beginning of the weld.
Effects of moisture content on thermal conductivity of thermal insulation materials
Authors: Gusyachkin A M , Sabitov L S , Khakimova A M , Hayrullin A R 
Published: August 2019

Abstract
Insulation materials play an important role in district heating pipeline networks. Thermal losses in pipe insulation systems depend on the thermal conductivity of insulation materials. The thermal conductivity of the insulation materials is influenced by the temperature and moisture content. In this paper the effect of moisture content on the thermal conductivity of rock wool produced by different manufacturers was considered. Experimental studies were performed using the standard guarded hot plate (GHP) method. Higher thermal conductivity is always associated with higher moisture content for all investigated samples.
Research of efficiency of work of heat-mechanical equipment by the thermography method
Authors: Karataev O R , Karataeva E S 
Published: August 2019

Abstract
The paper deals with the solution of problems to assess the technical condition of thermal mechanical equipment, on the example of boilers by thermography. As a result of the study of the brickwork of the steam hot-water boiler, thermal imaging images were obtained, from which it can be concluded that the brickwork of the boiler does not perform its direct functions, the insulation is outdated. Thus, constant monitoring allows making current repair of machinery, reducing wear and heating loss to maintain efficiency at the project level.
New methodological approach to the development of the theory of electric traction of urban electric transport
Authors: Kashapov N F , Sabitov L S , Auhadeev A E , Litvienko R S , Pavlov P P 
Published: August 2019

Abstract
The article presents the scientific hypothesis that the modes of operation of electric traction equipment as part of an automated electric drive of the rolling stock of urban electric transport are formed under the influence of a complexly organized technological process of electric traction and are the topological basis of its structure. The aim of the study was to study the process of converting electrical energy into a targeted mechanical movement of rolling stock in the implementation of all technological conditions of the production and technical system of urban electric transport. The theoretical study was carried out on the basis of a methodological analysis of the theory of electrical equipment, the theory of automatic control and an automated electric drive, the theory of electric traction, the theory of motion construction, a systematic approach and a synergistic natural science paradigm. The main result is a formulated scientific concept, which allows to present the process of electric traction as a system consisting of five levels that are in hierarchical relations and solve each specific problem of building the movement of electric transport. The obtained theoretical system will allow developing the general theory of electric traction of urban electric transport by improving the methodological principles of the formation of operating modes of electric traction equipment when implementing the transportation process technology in the production and technical system of urban electric transport.
Modern problems of digitalization of agricultural production
Authors: Kashapov N F , Nafikov M M , Gazetdinov M KH , Gazetdinov SH M , Nigmatzyanov A R 
Published: August 2019

Abstract
At the present stage, the most promising form of digitalization of production and management in agriculture is the formation of an integrated digital production complex as an organic merger of technical means of digitalization of production on the basis of precision farming, artificial intelligence management, as well as information and analytical management system. The availability of such a powerful tool as an information and analytical system as part of an integrated digital production complex in combination with the most digitized production processes can simultaneously meet modern requirements for increasing productivity and reducing costs for the production of agricultural products and food, and a sharp increase in the quality of products. It is argued that the functioning of information and analytical systems in some large agricultural formations of the Republic of Tatarstan has provided a qualitative leap in the development of methods and means of digitalization of production and management. It became possible to integrate automated controls up to the level of agro-technological management without a gap between the organizational, economic and agro-technological levels. The main problems to be solved in the development of IAS IDPC are considered. Expert systems, which have been developing rapidly in recent years, seem to be a promising tool for solving such problems.
Justification of requirements to quality and accuracy of blankfor precision stamping
Authors: Shibakov V G , Pankratov D L , Nizamov R S , Nizamova L M , Khairullin R A 
Published: August 2019

Abstract
The dispersion of blank masses depending on the accuracy class of the initial metal rolling is estimated. The influence of the method of the initial blank segments on the stamping process is described.
Characteristic features of the cooling capacity of aqueous polymer solutions
Authors: Shveyova T V , Muhametzyanova G F , Astashchenko V I , Zapadnova N N , Zapadnova E A 
Published: August 2019

Abstract
For the study of quenching medium a special sample is developed that provides high reproducibility of thermal processes occurring on the surface of the cooled product. The results of the cooling method of aqueous solutions with different polymer content are given. The application of thermogravimetric analysis for the study of physical and chemical processes occurring during heating of a synthetic quenching medium is considered. The temperature intervals of endo-exothermic reactions as a result of oxidation of the polymer component of the solution are shown. The reasons for the formation of two extrema on the cooling capacity curve of aqueous polymer solutions are indicated.
The criterion of non-stationary cyclic fatigue of bodies, taking into account the presence of an incubation period of destruction
Authors: Talibly Latif H. 
Published: August 2019

Abstract
A functional of nonstationary cyclic fatigue of bodies was constructed under the assumption that the destruction process occurs in time after the deformation process.
Damage conditions are derived, which determines the number of non-stationary loading cycles, in which damage and cyclic fatigue occurs in the body, which makes it possible to find the nonstationary number of loading cycles before failure.
The prospects of modern quality management approaches integration (on the example of the Republic of Tatarstan)
Authors: Vorontsov D P , Pirogova A S , Shikhalev A M , Khamidullina G R , Kashapov N F , Khananova A F , Rozhko O N 
Published: August 2019

Abstract
In the research basing on the quality management modern approaches and the practice of the Republic of Tatarstan leading industrial enterprises are estimated the possibilities of energy management systems improving (with intensive introduction of modern industrial equipment) through the integration of the quality management system. In our study is made an analysis of present energy management systems functioning indicators and demonstrated the further need for these two systems integration in the modern management.
About Modeling Kinematic Parameters of Deposition from Composite Electrochemical Coatings for Restoration of Details for Agricultural Machines
Authors: Zhachkin S Yu , Sharifullin S N , Penkov N A , Zavrazhnov A A 
Published: August 2019

Abstract
Theoretical aspects of process of drawing of composite galvanic coverings on the basis of a chromic matrix on current-carrying surfaces are considered by method of galvanic contact plating (GCP). The analytical dependences connecting parameters of physic mechanical characteristics of a covering with technological modes of sedimentation of coverings and design features of the equipment, used in process are resulted.