bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nitrogen-doped CuAlO2 Films Prepared by Chemical Solution Deposition
Authors: Liu Weiwei 
Published: October 2020

Abstract
N-doped CuAlO2 thin films were prepared by chemical solution deposition and annealed at different temperature in nitrogen ambience. Single phase N-doped CuAlO2 thin films can be obtained by annealing the films at 1000 °C. Crystallization quality of the film was improved by increasing annealing temperature. XPS measurements showed the N has successfully incorporated into the CuAlO2 thin films. Above results show that the chemical solution deposition was an effective way to prepare the N-doped CuAlO2 thin films which can be used in optoelectronic devices.
The Simulation of Resonant Mode and Effective Electromechanical Coupling Coefficient of Lithium Niobate Crystal with Different Orientations
Authors: Bai Xiaoyuan , Shuai Yao , Luo Wenbo , Wu Chuangui , Zhang Wanli 
Published: October 2020

Abstract
At present, the proportion and role of thin film bulk acoustic wave (FBAR) filters in mobile communication products are becoming more and more obvious due to its higher work frequency and smaller size. As a commonly used piezoelectric material, aluminum nitride (AlN) limits the bandwidth of the FBAR filter because of its small electromechanical coupling coefficient (kt
2) of ~6.5%. On contrast, lithium niobate (LiNbO3, LN) crystals with some certain specific orientations have much better acoustic properties, making this type of material the promising candidate for FBAR applications. In this work, the acoustic resonant mode in LN crystal is analyzed by FEM simulations. In order to obtain the optimal orientations with good longitudinal wave property, Euler angle (EA) method is used to simulate the resonant modes and calculate the corresponding kt
2 of different orientations. Besides, the correctness of EA method has been demonstrated in this work by comparing the displacement change under electrostatic field with the traditional matrix transformation operation depending on the piezoelectric effect. The simulations show that the 43°Y-cut LiNbO3 has a high kt
2 and a pure longitudinal wave vibration mode simultaneously, making this orientation the most proper candidate for FBAR filters application with large bandwidth.
Direct Lightning Flash Protection of Satellite Antenna
Authors: Feng Jun , Zhang Qian , Guo Yanshen , Wu Jianlong , Chen Meiyi 
Published: October 2020

Abstract
It will cause some problems like improper way of lightning protection and improper height of lightning rod in the design for direct lightning flash protection of satellite antenna, which may increase the probability of lightning strike, due to the lack of express provisions in relevant standards about satellite antenna lightning protection level and direct lightning flash protection ways. A way was presented for the determination of lightning protection level based on probability and risk assessment of lighting through a specific instance, by comparing the probability of lightning, costs and difficulties for construction between two different types of lightning protection ways under the same conditions for indirect lightning protection, an appropriate way was proposed for direct lightning flash protection by using lightning rod installed on the satellite antenna.
Application and Prospects of Prefabricated Buildings in Rural Areas of China
Authors: Ru Qiujin , Feng Jiandong , Lu Qin 
Published: October 2020

Abstract
This article analyzes the status and existing problems of rural housing in China. In order to promote the construction of new countryside and improve the quality of rural housing, prefabricated buildings should be preferentially adopted in rural areas. According to the application and promotion status of prefabricated buildings, compared with traditional buildings, the advantages of prefabricated buildings are obvious. However, there are many obstacles in the promotion of prefabricated buildings in rural areas. In order to change the appearance of buildings in rural areas, more policy support should be provided during the construction of new farmers, so that prefabricated buildings can be better promoted.
Fe3O4/Graphene Aerogel as High-Performance Flexible Anode for Sodium-Ion Battery
Authors: Wei Guangling , Zhou Jiahui , Xie Man 
Published: October 2020

Abstract
To overcome the volume expansion and poor electrical conductivity of metal oxides, graphene aerogel encapsulated Fe3O4 nanoparticles composite material was synthesized by hydrothermal self-assembled method. Fe3O4 was synthesized in situ during the self-assembled process, effectively relieving volume expansion and pulverization of metal oxides by the encapsulation of graphene aerogels (termed Fe3O4@rGA). Besides, the graphene aerogel enhances the conductivity of the composite material. The Fe3O4@rGA used as anode material for sodium ion batteries in this study displayed an excellent initial capacity of 220 mA h g−1 at 100 mA g−1, and even showed reversible capacity of 82 mA h g−1 at 10 A g−1.
Research on the Development Status, Strategic Choice and Business Model of China’s Charging Pile Industry
Authors: Tan Qingkun , Wu Peng , Wei Tang , Yu Zhang 
Published: October 2020

Abstract
The interaction between electric vehicles and power grids can achieve the functions of cutting peaks and valleys of load, participate in frequency modulation, and provide reserve service. It is of great significance for the safe and economic operation of power grids and the ability to improve the capacity of new energy power generation. However, due to the lag of the development of China’s charging pile industry, which constrained the development of electric vehicles. This paper analyzes the key issues of market mechanism and infrastructure of charging piles. First, this paper summarizes the development status of China’s charging pile and proposes the research route for the development of charging pile bottlenecks; secondly we analyze China’s policies on different stages and construct implementation path of charging pile. By comparing the basic indicators, related policies and related innovation activities of the charging pile for China, we conclude that the development of the national electric vehicle industry needs to be increased in terms of government policies, business model innovation and public awareness.
Research Progress of Soil and Water Conservation in Pisha Stone Area of Yellow River
Authors: Shen Zhenzhou , Yao Wenyi , Xiao Peiqing , Wu Yan , Song Jingru , Liu Jie , Liu Mingxin , Yang Jishan , Yang Haoyu , Duan Huiling , Li Li , Dong Feifei , Li Weiwei , Liu Cuixia , Bi Wenyan , Geng Xiaodong 
Published: October 2020

Abstract
Ecological degradation and serious soil erosion in the sandstone area of the Yellow River Basin have resulted in a large number of manpower and material resources during the decades-long governance process, and various governance measures have been developed. This article introduces the erosive sandstone area and the existing erosive sandstone erosion control technology, analyzes the methods, materials, and treatment effects of the slope top-slope surface-ditch, and then focuses on the ecology of the Ordos Plateau volcanic sandstone area undertaken by the Yellow River Hydraulic Research Institute. Comprehensively consider the governance technology project, and on the basis of this project, it is envisaged to introduce the concept of buffer zone, in order to provide more research ideas for sandstone governance.
Monthly Streamflow Prediction Based on Random Forest Algorithm and Phase Space Reconstruction Theory
Authors: Peng Feng , Wen Jie , Zhang Yao , Jin Junying 
Published: October 2020

Abstract
In order to find an effective time series forecasting method, a random forest prediction model based on phase space reconstruction theory is proposed in this paper. The Cao method and mutual information function method are used to reconstruct the phase space, and the parameters of the random forest (RF) model are discussed. The feasibility of the model is verified by analyzing the monthly runoff data of Pingshan hydrological station in Jinsha River Basin. Compared with BP neural network (BPnet) model and traditional support vector machine (SVM) model which optimizes parameters by grid algorithm, random forest model has higher prediction accuracy and less calculation in dealing with complex nonlinear hydrological time series as shown by the result.
Precipitation and Growth of Ni-Rich Substances in the Oxide Scale of Steel in Mixed C2h5oh-H2o Atmosphere
Authors: Zheng Chengming , Zhao Yan , Tian Qingchao 
Published: October 2020

AbstractNickel is an iconic alloying element in the piercing plug steel. In order to study the formation mechanism of Ni-rich substances in oxide scale of steel under mixed C2H5OH-H2O atmosphere, the high-temperature oxidation experiment was carried out by employing steels with varied Cr and Ni contents, and the oxidation characteristic was explored by using scanning electron spectroscope (SEM), energy dispersive X-ray spectroscopy (EDS), metallographic microscope (OM) and Image-Pro Plus. Under the experimental conditions, it is found that Ni promotes the formation of denser inner oxide scale while Cr inhibits inner oxidation effectively. Congregation of Ni-rich substances is a diffusion process strongly relying on the Ni content of the steel. The total Ni-rich substances dependence of Ni content follows the parabolic law. It is proposed that the Ni-rich substances precipitate once the oxidation of Fe or Cr atoms leaves vacancies for the nearby Ni atoms to fill in to form a substitute Ni-rich crystal structure, and then the Ni-rich substances congregate and grow up as oxidation proceeds. The results are meaningful for the reasonable design of piercing plug steel.
Present Situation and Key Technology Analysis of Bimetallic Composite Roll Preparation Method
Authors: Shi Xiaofang , Zhu Chunli , Zhu Zhenghai , Chang Lizhong 
Published: October 2020

Abstract
Bimetallic composite roll has a great influence on improving roll quality and reducing roll preparing cost. In this paper, the development status of bimetallic composite roll preparation technology is analysed, and the advantages and disadvantages of various manufacturing methods of composite roll are discussed. Based on the preparation process of bimetallic composite roll, the key technologies affecting the quality of composite roll are analyzed, and a new idea of preparing high-performance composite roll based on "width adjusting mold coupling multi-electrode rotating technology" is proposed.
Study on Austenite Grain Growth Behaviour of New Pipeline Steel for Deep Sea
Authors: Zhao Xin , Bai Hongyang 
Published: October 2020

Abstract
The austenite grain growth behaviour of new pipeline steel for deep sea was researched by using optical microscope. The results show that the microstructures are homogeneous and the grain size increases slowly while the soaking temperature increases from 1120°C to 1180°C. However, the abnormal growth phenomenon can be observed in the specimens reheated at 1210°C. The austenite grain growth behaviour can be described by following equations: lnD = 7.7738- 6242/T (1120°C< T< 1180°C) and lnD = 51.2948-69510/T (1180°C<T <1210°C).
Study on Pickering Emulsions Stabilized by Tea Polyphenols/Gelatin/Chitosan Nanoparticles
Authors: Wang Hui , Bai Yan , Shao Dongxu 
Published: October 2020

Abstract
The tea polyphenols/gelatin/chitosan (TGC) nanoparticle was prepared and applied to stabilize Pickering emulsions. The particle size of TGC nanoparticle was about 880 nm with the mass ratio of tea polyphenols to gelatin 1:2. The apparent viscosity of TGC nanoparticle showed typical non Newtonian pseudoplastic behavior, and increased with the increase of tea polyphenols content at the same shear rate. The size distribution of Pickering emulsions stabilized by TGC nanoparticles was highly uniform. The average droplet size of emulsions increased from 46 μm to 80 μm when the mass fraction of oil phase increased from 30% to 60%. The emulsified volume fraction increased with the increase of oil fraction. Nanoparticles provide a strong force on the oil-water interface and effectively inhibit the aggregation and coalescence of droplets. The Pickering emulsion exhibited good storage stability and good stability under high temperature heating.
Lumped RC Thermal Network Method Applied to Transient Temperature Calculation of High Voltage Bushing and Its Insulation Life Assessment
Authors: Zhang Shiling 
Published: October 2020

Abstract
To analyze how the internal transient temperature of the high voltage condenser bushing varies with its short-time current carrying capacity and long-aging properties, lumped RC thermal network model applicable to the structure of HV bushing is proposed. This model considers three heat transfer modes of the conduction, the convection and the radiation, and the changing relationship between material properties and temperature and the the thermal RC network topology is realized based on the MATLAB/SIMULINK. In the example of 550kV oil-SF6 bushing, the calculation results of transient temperature thermal network are in good agreement with the actual temperature rise test results which proves effectiveness and practicality of lumped RC thermal network. We used the thermal network to confirm the periodic transient variation at the hottest spot of HV bushing and analyze the shot-time current carrying capacity by step load curve fitting circadian cycle change load. Finite element method and thermal network method are used to get the electric and thermal stress respectively and HV bushing long-aging properties analysis was conducted based on classic ZHURKOV and CRINE electric and thermal combined aging model. This paper applies lumped RC thermal network method to transient temperature calculation and internal insulation life assessment of the HV bushing, reinforced classic bushing design method only considering rated steady-state operating conditions and has theoretical guidance on assessing short-time current-carrying capacity and long-aging properties in high voltage bushings.
Research of Installation Stress of EMU Aluminum Alloy Beam and its Connecting Structure
Authors: Fan Ruirui , Zou Hua , Sun Shouguang , Zhang Yonggui 
Published: October 2020

Abstract
Bolt hanging is one of the common ways of rail vehicle hanging equipment. In this paper, the assembly structure of a type of EMU and converter is taken as the research object, and the load values at the four suspension points are calculated by theoretical calculations. A simulation model of a single hanger is established, and the simulation is determined by reference to the theoretical calculation under working conditions, the stress distribution at the hanging points under different loads was studied. The results show that under different loading conditions, the stress distribution of beam is basically the same. The maximum stress of the beam occurs at the point where it contacts the bolt head. Compared with other regions, the stress at the corner of the T-slot of the beam is also larger.
Indoor Scene Semantic Segmentation Based on RGB-D Image and Convolution Neural Network
Authors: Wang Guitang , Wang Ziyu , Chen Yongbin , Wang Guozhen , Chen Jianqiang 
Published: October 2020

Abstract
In recent years, convolutional neural network has been widely used in image semantic segmentation and achieved great success. In this paper, a semantic segmentation network of indoor scene based on rgb-d image is proposed: SRNET (Strong supervision Residual Net). In this network model, the original data is processed by separate training and gradual fusion, and the mandatory supervision module is added in the decoding stage, which effectively improves the accuracy of semantic segmentation. At the same time, anti residual decoding method and jump structure are introduced to reduce information loss. Experimental results show that the segmentation accuracy of this model is better than most of the current segmentation algorithms.
Effect of Laser Shock Strengthening on Modal Frequency
Authors: Liu Jingyuan , Cheng Li , Li Dongchun , Wang Bohan , Ding Junliang , Zeng Lin 
Published: October 2020

Abstract
The phenomenon of laser shock strengthening (LSP) changing the resonance frequency of a structure can be used to adjust the frequency of aero-engine blades, and has a broad application prospect. In this paper, through the combination of mechanical analysis, numerical simulation and vibration test, the effect of LSP technology on structural vibration characteristics is studied. The influence mechanism of local stiffness changes on the modal frequency of the structure is analyzed from the perspective of vibration and energy. It is found that when the laser shock is strengthened in a region with large bending deformation, the greater the contribution to the overall modal stiffness and elastic potential energy, the greater the modal frequency. The impact is also greater. Established a mapping relationship among laser shock strengthening, local stiffness and modal frequency, and finally proved that LSP technology can significantly change the local elastic modulus of TC4 titanium alloy, which provides a reliable application of the technology in the production department Theoretical support.
Study of the k-ary GCD Algorithm
Authors: Amer Ismail F , Saad Muhammad 
Published: October 2020

Abstract
In our paper, we consider some approaches to accelerating the calculation of the Greatest Common Divisor (GCD) of natural numbers for given A and B based on the k-ary GCD algorithm. Such a task arises in the implementation of many mathematical and number-theoretic algorithms, for example, in cryptography and number theory (see [8]).
On the linear complexity of new generalized cyclotomic binary sequences of period p

n

q

m
Authors: Edemskiy V A , Garbar S V 
Published: October 2020

Abstract
Sequences with high linear complexity are of importance in different applications. These sequences can be derived from generalized cyclotomic classes. In this paper, we construct new families of binary sequences of period p

n

q

m
using new generalized cyclotomic classes, as well as study the linear complexity of these sequences. We obtain the estimate of the linear complexity of new sequences and show that they have high linear complexity for m + n > 2.
Comparative investigation of electrophysical characteristics of ceramic and single crystal LiNbO3
Authors: Efremov V V , Shcherbina O B , Palatnikov M N , Masloboeva S M 
Published: October 2020

Abstract
Electrophysical characteristics have been studied in ceramic and single crystal LiNbO3 of congruent and near-congruent composition. The comparative study has been carried out in a wide temperature range (290-800 K). Dispersion of the real part of the dielectric constant ε′ has been considered. Temperature dependences ε′(T) and σ(T) have been obtained and value of static conductivity has been determined in ceramic and single crystal LiNbO3 in the given temperature range. Temperature dependences of specific static conductivity σ

dc
have been obtained due to impedance spectroscopy data analysis. Ceramic LN conductivity has been shown to be much higher in the whole studied temperature range. Charge carriers activation enthalpy in high-temperature area (above 420 K) is H

a
= 0.88 eV for ceramic LN and H

a
= 1.24 eV for single crystal LN.
Analytical inversion of one-dimensional operators of diffraction of electromagnetic waves in Sobolev spaces
Authors: Eminov S I 
Published: October 2020

Abstract
The paper develops a method for analytical inversion in Sobolev spaces on a segment of one-dimensional integral diffraction operators that depend on a parameter. The method is based on positive definiteness of operators and the presence of an orthonormal basis. For a special case, the operator of diffraction of an H – polarized wave on a band or on the surface of a vibratory antenna, the inverse operator is explicitly constructed. It is possible to study the physical properties of surface currents using the inverse operator, as well as to construct an effective numerical method for solving integral diffraction equations.
On refractive index of optical radiation of polycrystalline silicon films
Authors: Gavrushko V V , Ionov A S , Lastkin V A , Telina I S 
Published: October 2020

Abstract
Transmission spectra of layers of polycrystalline silicon on sapphire with a thickness of 0.1 … 0.8 µm were investigated. The refractive indices were determined in the range of 0.5 … 2.7 μm. An increase in the refractive index with decreasing wavelength was established. An increase in the film thickness from 0.1 to 0.8 μm led to a decrease in the refractive index from 3.2 to 2.8 at λ = 1.5 μm. Compared to single crystals, the refractive indices of polycrystalline films were lower. The data obtained can be used to build models for calculating the optical characteristics of complex compositions.
Peculiarities of regression model design based on neural networks
Authors: Grigoryeva N Yu , Perkov A S , Zhangirov T R , Liss A A 
Published: October 2020

Abstract
In this article a neural-network regression model for prediction of the bacterioplankton abundance according to physicochemical parameters of the environmental conditions is considered and some of the peculiarities of its development are described. A particular case of small and very heterogeneous data sample, typical for biological applications, is analysed. To solve this problem, a number of multi-layer feed-forward neural networks with different architectures are studied. The regression results are estimated on the base of determination coefficient and standard deviation of predicted values in the test sample. The effect of the dropout, applied to one of the hidden layers, on learning process and obtained results is analysed.
Estimation of the probability of correct determination of the coordinates of an object in computer modeling of methods for selecting their images
Authors: Kornyshev N P , Serebrjakov D A 
Published: October 2020

Abstract
The article discusses the issues of computer modeling of methods for selecting images of objects. It considers a test video sequence with given background and object parameters. The issues of computer simulation of the formation of such a video sequence, as well as the process of selecting an image of an object and measuring its coordinates are discussed. Examples of test images and graphs of the obtained dependencies of the probability of the correct determination of coordinates depending on the specified parameters of the object and background are given.
Electronic structure of the ideal Si (001) surface by first-principles calculations
Authors: Manyakin M D , Kurganskii S I 
Published: October 2020

Abstract
The electronic structure of Si nanofilms with an ideal unreconstructed surface (001) was modeled using the full-potential linearized augmented plane wave method. Total and local density of states spectra are calculated. The transformation of the electronic structure of nanofilms with an increase in their thickness from 1 to 10 silicon elementary cells along the crystallographic direction Z (4-40 monoatomic layers) is considered. A layer-by-layer analysis of a nanofilm electronic structure with a thickness of 40 atomic layers was performed.
Study of sensor properties of zinc oxide based nanostructures
Authors: Nalimova S S , Kondratev V M , Ryabko A A , Maksimov A I , Moshnikov V A 
Published: October 2020

Abstract
Nanostructures based on zinc oxide were synthesized on ceramic substrate with interdigitated electrodes by spin-coating and low-temperature hydrothermal method. The sensor response to CO, CO2 and O2 was studied at room temperature under near UV light illumination. Gas exposure was supplied using metrological certified equipment. All samples showed no response to CO2. Layers based on zinc oxide nanowires are most sensitive to CO because of complex morphology and more effective adsorption of gas molecules. The obtained dependencies allow us to characterize the interaction of nanostructure based on zinc oxide with the main oxidizing and reducing atmosphere gases.