bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling Thunderstorm Based on Paralleled and Improved Naive Bayes
Authors: Zhou Chengdong , Li Leixiao , Wang Hui , Liu Shuang 
Published: November 2020

Abstract
Aiming at improving the low efficiency and inaccuracy of the traditional thunderstorm prediction model, a paralleled and improved naive Bayesian thunderstorm prediction model SPNBC is proposed. The native Bayesian classifier (NBC) model assumes that the attribute data set is independent, which leads to inaccurate prediction. The principal component analysis algorithm is used to optimize the Bayesian algorithm to build PNBC. First, a new attribute data set is constructed by the principal component analysis (PCA) algorithm to eliminate the dependency between attributes, and a naive Bayesian classifier is constructed on the new attribute data set. Secondly, SPNBC is obtained by parallel design of PNBC based on spark framework to improve the time efficiency. Finally, taking the thunderstorm prediction in Hohhot as the application background, the accuracy rate, false alarm rate, speedup ratio and scalability ratio were used to analyze the experiment. The experimental results show that the SPNBC of this paper is better than the traditional naive Bayes algorithm and neural network algorithm, and the prediction accuracy rate and empty alarm rate are larger when dealing with massive data Performance advantages.
An Analysis of Patent Application for TCM Intervention Treatment of Immune Diseases—Take China and Guangdong Province Patent as an Example
Authors: Pang Hongshen , Lin Can , Qin Xiaochu , Guo Chen , Sun Qi , Xu Xiaoqi , Song Yibing , Wang Lu 
Published: November 2020

Abstract
Immune diseases are a great threat to people’s health. As a crucial component of Chinese medicine, TCM (Traditional Chinese Medicine) has many similarities with modern immune disease treatment in basic thinking and theory. Recently, it is found that TCM treatment has a positive effect on immune diseases treatment. To support the innovation and breakthrough of immune disease treatment, our paper focuses on the analysis of TCM intervention treatment of immune disease patents in China and Guangdong Province, respectively. It makes early warnings about patent risk management. Through the analysis, we figured out that there were three features in common: (1)the quantity of patent application in this area rose swiftly since 2013; (2) the main category of patent technology were concentrated on A61K36 group; (3) corporations and institutions were dominated applicants;(4) In China, the applicants were geographically centralized in Shandong, Beijing, Jiangsu; In Guangdong, the applicants generally assembled in Guangzhou, Dongguan, Foshan. In conclusion, there is a lack of core patents in this field. From the perspective of patent layout, Guangdong needs to increase foreign patent applications and develop more core patents to enhance its competitiveness in TCM intervention treatment of immune diseases.
Model NOx Emissions Emitted from Coal-fired Boilers Based on Differential Evolution Fast Learning Network
Authors: Shen Zhiwen , Li Qingwei 
Published: November 2020

Abstract
Low NOx combustion optimization is a simple, efficient and inexpensive NOx emission reduction technology for coal-fired power plants. Establishing NOx prediction model is an important part of this technology. Fast learning network (FLN) is an improved neural network proposed in recent years, which is simple and efficient. However, randomly generated hidden layer thresholds and input weights would affect the performance of FLN. To solve this problem, differential evolution (DE) algorithm is employed to optimize hidden layer thresholds and input weights. The proposed model was applied to some 330MW coal-fired boiler together with FLN. Each model was repeated 51 times to consider the randomness of both models caused by the randomness of DE algorithm and the stochastic initialization of the original FLN. Results showed that the model has better generalization ability, retaining the good approximation ability and stability. Besides, optimization process of the proposed model is very fast and fit for online combustion optimization.
A Lexical Dependency Probability Model for Mongolian Based On Integration of Morphological and Syntactic Features
Authors: Loglo S. 
Published: November 2020

Abstract
Syntactic parsing is an important topic in the field of Mongolian language information processing. Compared with English and Chinese dependency parsing, Mongolian dependency parsing is still at the beginning stage. Mongolian syntactic parsing lack of Treebank resources seriously, under such conditions, a high quality syntactic parser cannot be developed by statistical methods simply. Aiming at the characteristics that Mongolian language has rich morphological features, this paper presented a rule and statistics-based dependency parsing model using Mongolian Dependency Treebank as training and evaluation data. The morphological and syntactic rules are represented using complex features and unification operations. The statistical model is represented using lexical dependent probability. This model has now achieved accuracies of 77.18%, 69.42% and 95.44% for the unlabelled annotation score, the labeled annotation score and the head word annotation score respectively.
2D Inversion of Frequency-domain Electromagnetic Data Generated by Line Current Source
Authors: Deng Xiaokang , Tong Xiaozhong 
Published: November 2020

Abstract
The inversion of electromagnetic data is an inherently non-unique and unstable problem due to the data noises and incomplete data coverage, which means different geo-electrical models could fit the observed data at the same level. A stable solution of an ill-posed inverse problem can be obtained by the regularization methods in which some desired structure are imposed to stabilize the inverse problem. We have developed an algorithm to invert frequency-domain electromagnetic data generated by a line current source for a 2D model of the earth. To stabilize the inversion, we adopt a smoothness-constraint approach for the model parameters and adjust the regularization parameter objectively using an adaptive regularization parameter technique. For calculating the sensitivities using any of the accurate methods will be very time-consuming, we applied the adjoint-equation approximate method. By means of the numerical examples using synthetic data, we have demonstrated that the inversion method can be effectively to reconstruct the subsurface resistivity structure.
E-Learning in the Courses on “Electromagnetics”, “Radio Wave Propagation” and “Electromagnetic Fields and Waves”
Authors: Semenikhin Andrei I , Semenikhina Diana V , Yukhanov Yuri V 
Published: November 2020

Abstract
The features of the educational and methodological software of E-Learning in the courses on “Electromagnetics”, “Radio Wave Propagation”, “Electromagnetic Fields and Waves” at the Southern Federal University (Russia), are considered. The electronic content MWLab EMPW of the type of online learning laboratory was developed, which allows you to organize online lectures, practical and laboratory classes, as well as self-monitoring and online knowledge control. A distinctive feature of the content is the use of video-clips of electromagnetic processes and virtual models of laboratory setups developed using Ansys HFSS. They clearly explain the formation in space and the change in time of the field lines and the values of the field vectors. This compensates for students’ difficulties in understanding the complex mathematical apparatus and the spatial-time nature of the processes of radiation and wave propagation, and increases interest in learning. E-Learning can be carried out on the MS Teams platform using the functionality of meetings and other interaction tools between the teacher and students.
Finite Element Simulation of Residual Stress around Split Sleeve Cold Expanded Hole for AA7075
Authors: Zhang Teng , Du Xu , He Yuting , Ma Binlin , Zhang Tianyu 
Published: November 2020

Abstract
Split sleeve hole cold extrusion strengthening technology is one of the most commonly used fatigue resistance technology for metal structures. The residual stress field of the hole cold extrusion strengthening structure needs to be analysed, which is an important part of the fatigue life study. Finite element analysis for the 7075 aluminum alloy cold extrusion strengthening plate is carried out in this paper. The effects of split sleeve and reaming process are considered in the analysis process, and the residual stress field at the hole edge is obtained. The numerical results are verified by the experimental results, which show that the two are in good agreement. It is show that the residual stress is the compressive stress near the extrusion hole while the tensile stress far away from the extrusion hole. Additionally, the compressive stress value is the largest in the middle layer, the smallest in the squeeze layer, and the value in the extrude layer is between the two.
Experimental and Numerical Simulation Studies of Failure Behaviour of Carbon Fibre Reinforced Aluminium Laminates under Transverse Local Quasi-static Loading
Authors: Huang Teng , Huang Yaxin , Lin Yuan , Yin Xuezhi 
Published: November 2020

Abstract
This paper investigated the failure behaviour of medium thick carbon fibre reinforced aluminium laminates (CARALL) panels under transverse local quasi-static contact crush experimentally and numerically. Four types of CARALL specimens with a 3/2 configuration were manufactured by hot-pressing process using two type of aluminium alloys (2024-T3, 7075-T6 aluminium alloy) and CFRPs with different lay-up ([0°/90°/0°]3, [45°/0°/-45°]3). Three dimensional Hashin progressive failure model in quadratic strain form with damage evolution laws defined by subroutine VUMAT based on ABAQUS was used to simulate the composite layers. The bilinear cohesive contact model was used to predict interfacial failure. Aluminium alloys were defined by Johnson-Cook model. Numerical predictions composing of load-deflection curves and failure mode were matched closely with experimental results. The results of the analysis shown that delamination in CFRP/Al interfaces was the initial damage of the tested CARALL panels. Matrix failure occurred after the delamination closely. The maximum load bearing was determined by fracture of aluminium alloy. Fibre breakage was responsible for complete failure of specimens.
Simulation Aided Design of Solar-Powered UAV
Authors: Xiao Wei , Zheng Zhicheng , Fan Qiongjian , Li Xiaolong 
Published: November 2020

Abstract
This paper describes a distributed flight dynamic simulation method. It needs reasonable computing resources, and can be applied in the design process of solar-powered UAV. A flight dynamics model is established based on the Hamilton’s principle, with the simulation model, this paper discussed the flight characteristics of the large aspect ratio flexible solar-powered UAV, and the influence of different design schemes, then proposed a simulation aided design method, which can be used to select design parameters of the solar-powered UAV, it can also provide reference for similar UAV design.
Numerical Simulation of Flow through a Sudden Contraction Split into Four Parallel Round Jets
Authors: Njoroge John , Gao Puzhen 
Published: November 2020

Abstract
Parallel jets are of profound importance in design of nuclear reactor components as well as other industrial applications. Vertical flow through a sudden contraction split into four round jets was numerically investigated using computational fluid dynamics (CFD). Results showed that jet spacing and jet size are the main parameters influencing the resulting flow field. In the upstream, both radial and streamwise velocity profiles drastically changed on approaching the contraction plane. Downstream, the flow field remained symmetric about the main axis. Velocity decay rate was found to be influenced by jet spacing, size and mixing characteristics. The results provide useful insights into mixing of multiple confined jets.
Simulation Analysis and Research on Integrated Forming Process of Steam Pipe Nozzle
Authors: Zhang Shaojun , Zhao Donghai , Liu Zhao , Liang Shuhua , Yang Wenbin 
Published: November 2020

Abstract
The FORGE@ numerical simulation was used to analysis and research on the integrated forming nozzle process of the main steam pipe, and then guide sampling test plan and forming process evaluation. The results show that the maximum axial tensile stress appears in the middle of the forming process, which is on the inner surface of the extrusion deformation transition region, and the maximum radial tensile stress and equivalent strain appears at the end of the extrusion nozzle forming process, which is located in the inner surface area of the nozzle mouth, and it is easy to crack. For the weak position, it is necessary to increase the number of samples and test items to verify the overall quality of nozzle.
The Simulation and Experimental Analysis of the Gradient Temperature Forming of the Bifocal Mirror Based on Spin-casting
Authors: Fu Weijie , Ning Lianshuang , Zhang Xinming 
Published: November 2020

Abstract
This research employed the methods of simulation analysis and experiment to study the movement trend of the glass melt and the deviation of the junction position of the surfaces in the spin-casting process of the bifocal mirror. By comparing the measurement result of the surface shape in the experiment with the predicted result of that in the simulation, the deviation between these two results is 6.5μm. It is proved that the simulation can predict the surface shape of the mirror blank obtained by spin-casting of the bifocal mirror. Through the results of simulation and experiment, it is found that there is a significant deviation between the junction position of the reflecting surfaces and the expected one. Therefore, by changing the position of the insulation wall, the purpose of compensation for the junction position of the surfaces can be achieved. When the insulation wall was set at different positions for many times of iterative simulation calculation, the deviation of the junction position of the surfaces was reduced from 4.358mm to 3.76 μm.
CST Analysis and Simulation of Signal Integrity of Differential Transmission Lines
Authors: Lin Xueyan , Yu Guangcai 
Published: November 2020

Abstract
The differential transmission line has been widely used in the field of high-speed signals with its unique transmission characteristics, and it will be affected by many factors during the transmission process. In this paper, the differential transmission line is taken as the research object, and a three-dimensional electromagnetic simulation software CST is used to study its signal integrity performance parameters including characteristic impedance, loss, and crosstalk. It is found through simulation that increasing the spacing between differential pairs will reduce the crosstalk. The smaller the differential pair length, the greater the value of the insertion loss. This will improve the quality of signal transmission.
Simulation Study of a Crack Test Equipment for Solid Rocket Motor Propellant
Authors: Wang Tingyu , Xu Jinsheng , Chen Xiong , Li Meng , Guan Lushuang 
Published: November 2020

Abstract
To establish safety assessment criteria for solid rocket motors with cracked propellant. In this paper, a specific test equipment was designed using UG NX software. The purpose of this equipment is to simulate the flow field and structural field inside the crack when the cracked propellant was impacted by the ignition gas flow. Using FLUENT and ABAQUS software to investigate the flow field and structure field of the equipment in the process of work, thus verifying the feasibility of the experimental equipment. The result shows: There is a certain regularity in the transmission process of the pressure peak inside the crack. The transmission direction of the pressure peak does not represent the flow direction of the gas flow inside the crack. The propellant in the middle of the crack is subjected to twice the number of impacts as the crack tip. The material in the middle of the crack may fail earlier than the crack tip, and the branch of the crack may occur.
Pressure Control Strategy and Simulation of High Pressure Common Rail System
Authors: Wang Dong , Xu Zhenyu , Su Chang , Hu Jianhua 
Published: November 2020

Abstract
Aiming at the control of the pressure wave of the high pressure tubing, considering the different design of the pressure reducing valve, two control strategies of the pressure reducing valve are discussed, and the problems to be noted when designing the control strategy are proposed. First, the actual high pressure common rail system is reasonably simplified as the “pump-nozzle-pipe” system, then based on the relevant theory (fluid flow formula, mass conservation law and relationship between fuel density and pressure), a mathematical model is established to determine the cam angular velocity, opening time and period and threshold of pressure reducing valve, and injection interval of nozzle, these parameters have a great influence on the pressure wave, and finally using the orthogonal test method to explore the influence of these parameters on the pressure wave by computer simulation. The research shows that only the injection interval of nozzle affects the size of the pressure wave range, other parameters only affects the pressure value at the time of stability. The larger the injection interval of nozzle, the smaller the size of pressure wave range. Therefore, when designing the control strategy, the injection interval of nozzle should be increased.
Research on SVG Electromagnetic Transient Simulation Technology of Large-scale Offshore Wind Power Base
Authors: Gao Liping , Li Guanghui , He Xin , Shao Chong , Sun Yanxia , Zhang Xing , Liu Keke 
Published: November 2020

Abstract
Based on the control hardware in-loop simulation technique, the article built the SVG control hardware in-loop electromagnetic transient real-time simulation platform, and completed the simulation analysis of the transient reactive response characteristics of the SVG controller under the ideal grid. Relying on the SVG control hardware in-loop simulation platform, using code encapsulation cryptography, a pure digital model of the SVG control system dynamic link library was established. The feasibility of the SVG control hardware in-loop real-time simulation platform and DLL model was verified by “three-line check” of the control hardware in-loop simulation model - DLL model - field experimental data curve, which provides a simulation analysis solution for the analysis of SVG transient response characteristics of large-scale offshore wind bases.
Simulation Training Effectiveness Evaluation Based on Fuzzy Comprehensive Evaluation
Authors: Zhang Shusen , Shi Xin 
Published: November 2020

Abstract
Based on the comprehensive analysis of the components of simulation training, the whole process and systematic evaluation and analysis of the effect of simulation training are carried out in three aspects: the group training ability of the group trainer, the expected degree that the simulation training system meets the simulation training and the training effect of the trainee, and the corresponding evaluation index system is established.
Research on the Innovation of “Situation and Policy” Curriculum through Computer Modeling and Data Analysis
Authors: Liu Hui 
Published: November 2020

Abstract
The significant data era on the Internet is changing our daily life, learning style, working mode, et cetera, at the same time it purposes new challenges and demands for ideological and political education in universities. The research on the innovation of the “situation and policy” curriculum in colleges under the premise of the significant data era can further improve the scientificity of the “situation and policy” curriculum. Under the background of significant data era, The countermeasures of strengthen the situation and policy course effect, standardize the teaching content, gradually realize the significant data of the teaching content; combine the ideological and political classroom with the social classroom; strengthen the training of teachers; establish a scientific curriculum assessment system. Through computer modeling to analyze some factors that affect students’ efficiency and grades. For example, the number of courses and assignments are taken as independent variables, and the final course score as a dependent variable, through computer modeling to establish a model of factors affecting student mark. By comparing the importance of different factors to offer a reference for the future education model.
Research on the Application of College Physical Education Teaching Mode in the Cloud Computing Environment
Authors: Xin Chao , Wang Xianliang 
Published: November 2020

Abstract
With the development of educational informationization in Colleges and universities, cloud computing technology has become the main means of educational informationization in Colleges and universities. The application of educational information technology in college physical education promotes the integration with physical education. It realizes the transformation of physical education teaching mode and physical learning mode in Colleges and universities, gives full play to the greatest advantage of information technology, and provides students with a good education environment and a scientific and effective learning tool. This paper studies the application of physical education in the cloud computing environment. This paper investigates the current situation of College Physical Education in the cloud computing environment, analyzes and summarizes the problems in the process of college physical education teaching, and gives the corresponding countermeasures and suggestions. It can provide theoretical basis and reference for the future application of cloud computing in college physical education. From the point of view of physical education, this paper studies the relationship between education informatization and physical education, explores new physical education teaching mode, improves the use of school physical education informatization, creates a good teaching atmosphere, and promotes the improvement of teaching quality.
Hotelling Model Analysis Based on Product Quality Difference with the Network Externality
Authors: Tong Qian 
Published: November 2020

Abstract
A network externality was introduced into the two-stage dynamic Hotelling model with the quadratic function of transportation cost on the basis of the quality difference between two products. In consideration of three different position relations among the consumers’ indifference curve, quality preferences for the products and population distribution density, the existence condition of equilibrium price between two manufacturers about the Hotelling model were obtained. Attention was paid to traffic-flow distribution technology and infinite dimensional variational inequality. Finally, the influences of network externality, transportation cost, cost difference and quality difference on equilibrium prices between two manufactures were analyzed.