bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of challenges and opportunities in the development of new energy vehicle battery industry from the perspective of patents
Authors: Tan Xiumei , Li Tianyu 
Published: January 2021

Abstract
Thanks to China's "three verticals and three horizontals" strategy and the important deployment of new energy policies, the new energy vehicle industry has developed rapidly. The rapid development has also led to some problems. From a macro point of use, patent is an important index to reflect the technological innovation of the industry, which can provide reference for the long-term development of the industry. From the microcosmic point of office, patent is the embodiment of the strength of research and development and core competitiveness of an enterprise, and is the weather vane of its innovation layout. Therefore, this paper will use patent analysis method, collect domestic 2002-2019 new energy vehicle patent data, analyze the current situation of china's new energy vehicle industry technology innovation from China's new energy vehicle patent application number, patent application trend, patent technology features, patent application geographical distribution, patent application body and other dimensions, comprehend the automotive industry in the face of new challenges and opportunities in the process of new energy vehicle transformation, and provide some ideas for the development of China's new energy vehicle industry on the basis of analysis of relevant issues.
Simulation and Experimental Verification of Sweep Frequency Vibration Fatigue for Motor Controller of Integrated Electric Drive System for Electric Vehicle
Authors: Xie Qi , Xiong Fei , Liu Jing , Chen Chen , Yang Yuedong , Ma Zhengwei 
Published: January 2021

Abstract
The motor controller of the integrated drive system for electric vehicles has the risk of sweep frequency vibration fatigue (SFVF) failure in the frequency range of 100 ∼ 440 Hz. In this paper, a finite element simulation method of SFVF for an integrated motor controller is introduced. The failure position of the motor controller component is predicted using this simulation method, which is consistent with the fracture position of the sweep frequency vibration fatigue test (SFVFT). This indicates that the simulation method is accurate. And the structural optimization suggestions are also put forward using this method. The optimized motor controller meets the requirements of SFVFT. This indicates that it is feasible to use this method during the design process of the motor controller for integrated drive system.
Design and analysis of DNC production data acquisition and monitoring system
Authors: Yi Xiaolu 
Published: January 2021

Abstract
The DNC production data acquisition system is designed based on TCP/IP protocol, which is responsible for monitoring the data of the single state of machine tool production and collecting production and processing information. In this paper, we analyze the design of a DNC production data collection and monitoring system. The first step is to design the framework of the entire system, then propose an implementation method to exchange client and server data and combine it with a network connection, and design a data request program for server and client. Optimized server-side data collection patterns were upgraded to ensure that clients could parse log information more efficiently.
Study on Modal Test and Analysis of Planetary Transmission Mechanism
Authors: Zhang Qiang , Li Shenlong , Zhang Yudong , Cheng Yan 
Published: January 2021

Abstract
The planetary transmission mechanism is the core component for realizing the maneuverability of high-speed tracked vehicles. The modal test can determine the transmission characteristics of the planetary transmission system structure, and can check whether the dynamic characteristics of the planetary transmission system meet the design requirements. It is the basis of studying the dynamic characteristics of planetary transmission mechanism. In this paper, the free mode of the planetary variable speed mechanism is tested by using the free modal test method, and the modal analysis is carried out by using the finite element method. The results show that the vibration modes of the planetary variable speed mechanism are consistent with the results of finite element simulation, and the deviation between the measured modal frequency and the simulated modal frequency is less than 2%. The modal test provides the basis for the verification of the structural dynamic model and the dynamic coupling analysis of the planetary transmission system.
Research and Design of High Sensitivity FBAR Micro-mass Sensors
Authors: Ren Jiatai , Chu Hequn , Bai Yuhui , Wang Rui , Chen Pengguang , Chen Jianming 
Published: January 2021

Abstract
Micro-mass sensors have important application in chemical and biological sensing. Based on the theory of thin film bulk acoustic resonator (FBAR), this paper represents four designs of different micro-mass sensor models. COMSOL Multiphysics™ software is used to simulate the FBAR sensor sensitivity, which with low-impedance acoustic layer and additional electrode frame. In the finate element simulation models, five different values of mass-loading were applied. From the experimental results, the characteristic parameters and the sensitivity of the FBAR sensors were obtained. It is known to us that the FBAR sensor’s frequency quality factor can be improved by using the electrode frame, and its sensitivity can be enhanced by using the low-impedance acoustic layer. To sum up, the above analysis shown that the best sensitivity is 1.351 × 10-12ng/μm2/Hz and the frequency quality factor is 1415, which is the FBAR sensor with a single-step electrode frame and a low-impedance acoustic layer.
Research on Application of Construction Model Based on 4D Visualization in Construction of Intelligent Substation
Authors: Ren Chunguang , Wang Yachen , Xue Kai , Zhi Shenglong , Chen Tao 
Published: January 2021

Abstract
At present, the existing technology has not yet realized the conversion process from the digital design model of the substation project to the construction model. This paper provides a solution to this problem. After the design model GIM is loaded into unity, the vertices and materials of the GIM model are read and loaded into the scene through the company's independent research and development of three-dimensional design software (STD-R). The model level information returned by the terminal corresponds to the loaded model one by one, thereby obtaining a model tree structure. The research results of the thesis provide convenience for the design and construction of power grid substation projects.
Research and Analysis on coordination degree of nonlinear identification entropy coupling model based on regional economy, social environment and sports industry
Authors: Yang Chunhua , Zhang Wanjun , Zhang Feng , Gou Xiaoping , Zhang Yunli , Guo Qiurong , Li Bingze 
Published: January 2021

Abstract
In view of the coordinated development of regional economy, social environment and sports industry, this paper constructs a research index system of coordination degree, and puts forward a nonlinear identification entropy coupling of regional economy, social environment and sports industry. It takes Chongqing, Sichuan, Guizhou, Yunnan and Xizang as examples to analyze. A nonlinear identification entropy coupling model of regional economy, social environment and sports industry is established. Finally, through MATLAB simulation analysis, the results show that the nonlinear identification entropy coupling model identification method is suitable for the coordinated development of regional economy, social environment and sports industry. The simulation results verify the feasibility and effectiveness of GMM model identification method based on sports economic growth, and provide reference for the stable development of sports economy.
Simulation Research on Distribution Characteristics of Electromagnetic Field of AC UHV Transmission Line
Authors: Chen Shiyu , Guo Yuenan , Lan Sen , Zhang Kexin , Tan Long , Zhang Dewen 
Published: January 2021

Abstract
With the development of UHV and long-distance power transmission technology in my country's power grid, the electromagnetic environment of 100kV UHV transmission lines will be one of the key issues affecting the feasibility of UHV transmission. The impact of low-frequency noise from UHV AC transmission lines on the lives of residents along the corridor should not be ignored. In particular, pure AC sound attenuates slowly along the line and spreads far away, which often has more serious impacts on the lives of nearby residents. In order to study the distribution law and influence degree of pure sound, this article mainly conducts a more in-depth study on the wiring method of UHV transmission lines through theoretical calculation and computer simulation.
Wave Soldering Coupled Thermal-mechanical Simulation of Multi-layer Ceramic Capacitors
Authors: Su Wei , Luo Wenhao , Li Junkui , Liu Renhuai 
Published: January 2021

Abstract
In this paper, the thermal-mechanical coupling finite element analysis of MLCC wave soldering with heat conduction and heat convection is calculated, and the steady-state temperature field and transient temperature field as well as the stress distribution of MLCC are obtained. Using the finite element analysis method of indirect thermal-mechanical coupling, the stress analysis is carried out with the temperature field as the boundary condition, and the thermal-structural coupling model is established. By analyzing the thermal stress of MLCC, the weak parts sensitive to thermal stress are determined, which provides a useful reference for solving the reliability problem of MLCC wave soldering.
Design of weak magnetic signal detection system for residual stress detection
Authors: Wei Yanyu , Chen Dixiang , Zhou Weihong , Liu Lihui 
Published: January 2021

Abstract
The residual stress detection based on eddy current method belongs to weak signal detection. Aiming at the problems of sensor output signal with many channels, large amount of data, wide frequency range and low signal-to-noise ratio, a weak magnetic signal detection system is designed and implemented with Zynq-7020 (ARM+ FPGA) as the development board and peripheral hardware circuit. Among them, FPGA controls the peripheral chip to complete the signal source excitation and 8-channel high-speed data acquisition and preprocessing, and then the data is transmitted to ARM through AXI bus. ARM extracts the signal characteristics through digital orthogonal lock-in amplification technology according to the control parameters provided by the upper computer, and feeds back the results to the upper computer. The test results show that the system has high stability and detection accuracy, and meets the overall requirements of the system.
Analysis of Failure Mechanism of Smart Meter Capacitance
Authors: Zhu Binruo , Wang Xingang , Zhang Yin , Zhu Zheng 
Published: January 2021

Abstract
In practical applications, smart meters will fail, and even have batch quality problems. In addition to the sampling inspection of the arrival quality of smart meters, the analysis of the failure mechanism of smart meters has become an important and long-term task. This article mainly analyzes the component capacitance commonly used in smart meters, and analyses the failure of chip multilayer ceramic dielectric capacitors from appearance observation, electrical parameter testing, metallographic slicing, and at the same time from electrolytic appearance observation, electrical parameter testing, X- RAY, SEM and EDS for failure analysis. The results of failure mechanism research not only help to improve the reliability of the domestic energy meter manufacturing level, but also can save energy meter maintenance and transformation costs, and have very important practical significance for the construction of smart grids.
Study on Protective Effect of Different Kinds of Labor Protection Products in Power Supply Enterprises
Authors: Zhu Baoyu , Sun Chengxun , Jiang Shixiong , Chen Tao , Liu Sen , Li Hongyan , Zhang Shipei 
Published: January 2021

Abstract
Scientific and reasonable use of labor protection equipment can not only eliminate the economic loss of accidents, but also improve the efficiency of workers, and even improve the economic benefits of power supply enterprises. The evaluation of the protective effect of labor protective articles can provide reference for the equipment of labor protective articles. In this paper, starting from personal protection, a whole set of protective effect evaluation system is established from the aspects of protective ability, abrasion resistance and tear resistance, comfort and others according to the requirements of power supply protection, and then conduct empirical analysis to discuss the different protective effects of different types of protective articles. The results showed that protective clothing C and E with the best protective effect not only had higher anti-seepage and anti-penetration ability, but also had anti-static and anti-radiation ability, the protective effect of which is 36.9% than that of the worst one. Antis-eepage and anti-penetration ability can be used as the primary selection standard of protective clothing. When selecting protective products, if the economic conditions permit, choose a higher-priced protective product, and the protection effect is better. If there are special protection needs, such as protection shoes against cold or high temperature, you can choose protective products with special protective properties according to your needs. The results obtained can be used as a reference for different post protection products.
Research on Artificial Intelligence Technology in Electrical Automation Control
Authors: Luo Qin , Liu Dongkun , Song Shize , Yang Weikai , Qiao Zhiming 
Published: January 2021

Abstract
During the development of electrical automation control, artificial intelligence technology has become an important development trend. The stability and practical advantages of control based on artificial intelligence technology can effectively improve the level of electrical automation control. Such as remote control, intelligent monitoring, troubleshooting, product design, etc. only need to explore the application of artificial intelligence technology in electrical automation control.
Research on the Factors Influencing the Reuse of Municipal Solid Waste
Authors: Chen Caihong 
Published: January 2021

Abstract
By the end of 2019, the coverage rate of residential communities in 46 cities, including municipalities directly under the Central Government, provincial capitals and cities separately listed in the state plan, has reached nearly 70%. The classification effect of household garbage is obvious, and it has become a new trend leading low-carbon life. However, it is undeniable that there are still many problems. To solve the problem, effective solutions should be adopted, such as multi-means auxiliary, increasing the intensity of administrative intervention, multi-channel publicity of the harm of non-classification of garbage, etc., so as to effectively improve the recycling of domestic garbage.
Application of big data analysis technology in environmental monitoring
Authors: Chen Yanyan , Ren Fanglei , Wang Shuhuan , Zhang Linxuan 
Published: January 2021

Abstract
With the development of China's social economy, industrialization and urbanization, the problem of environmental pollution is becoming more and more serious, and people pay more and more attention to the problem of environmental pollution. The traditional environmental monitoring has no way to meet the needs of the government and people, so the combination of big data and environmental monitoring is the need of the times and the inevitable trend of the development of environmental monitoring. This paper will focus on the application of big data analysis technology in atmospheric detection, analyze the significance of big data analysis technology in environmental monitoring, and promote the wide use of big data analysis technology in environmental monitoring.
Application of star point design method in enzymatic hydrolysis of paphia undulate
Authors: Chen Xin , Chen Hua , Sun Huili , Liang Xin , Xu Feng 
Published: January 2021

Abstract
The effects of microwave–acid hydrolysis on enzymatic hydrolysis reaction of Paphia undulata were studied, and conditions of microwave–acid hydrolysis to prepare small molecular peptides from Paphia undulate were optimized by central composite design–response surface methodology to determine the best conditions of microwave–acid hydrolysis and enzymatic hydrolysis for this species Paphia undulata. Based on experimental results, to prepare small molecular peptides from Paphia undulate by enzymatic hydrolysis with peptide yield as the effect size, the optimal microwave-acid hydrolysis conditions are a solid-to-liquid ratio of 1:3, use of 6.4 mol/L hydrochloric acid, and microwaving at a power of 480 W for 210 s. The yield of small molecular peptide was 85.67%, which was similar to the peptide yield derived from the response surface model (86.62%).
Affecting factors on the enzymatic hydrolysis of paphia undulate in Marine shellfish
Authors: Xu Feng , Chen Xin , Chen Hua , Sun Huili 
Published: January 2021

Abstract
In this experiment, active peptide was extracted from the common clams corrugated paphia sinensis with high yield on the basis of predecessors. Research of enzymatic hydrolysis dynamics is mainly study the enzymatic hydrolysis rate and its influencing factors, the inherent law between the protein enzymatic hydrolysis dynamics model is deduced, and eventually to the industrialized production dynamic model to guide practice, dynamic model of Marine low-temperature enzyme digestion for understanding the mechanism of action of enzymes, enzymatic hydrolysis process condition control and optimization of reactor type and so on all is of great significance.
Thoughts on flexible governance in environmental mass incidents
Authors: Su Cao 
Published: January 2021

Abstract
The occurrence of environmental group events often brings harm to public interests. According to the traditional thinking, many local governments deal with mass incidents simply and roughly, and lack of effective communication, consultation and persuasion, which fully exposes the loopholes in government public management. In view of environmental mass incidents, we should not only be aware of citizens' dissatisfaction with the government, but also realize that citizens' awareness of environmental rights is revived. The government can communicate and negotiate with the public through flexible governance, so as to promote the good solution of environmental mass incidents.
Research on the Distribution of Vaporized Hydrogen Peroxide Based on UDF and Experimental verification
Authors: Zhang Huimin , Zhang Xianda , Gong Deli , Hu Jiejie 
Published: January 2021

Abstract
In order to obtain the concentration distribution rule of vaporized hydrogen peroxide during sterilization, UDF (user-defined function) is used to describe the functional relationship of the vaporized hydrogen peroxide mass fraction at the equipment inlet, Using the software AnsysFluent, the flow field in the space is mathematically simulated to obtain the mixture flow field. The comparative analysis with the data measured from field experimental. verified the correctness of the simulation results. Studies have shown that vortices appear in the flow field near top of the room and wall surface; the concentration of vaporized hydrogen peroxide increases with the height of the space; Elevated concentration of vaporized hydrogen is found at top of the sterilization chamber, and its content is higher than the middle and bottom of the sterilization chamber. Using UDF to describe concentration of the hydrogen peroxide at the entrance of the equipment is in line with the actual working conditions and can improve the simulation accuracy.
Extraction of Crop Planting Structure in County Based on Multi-temporal Images of Sentinel-2
Authors: Li Zhengqian , Xiong Feng 
Published: January 2021

Abstract
Accurate land information using was the foundation of the modern agriculture. The Sential-2 images were used as data sources in this paper. Firstly, spectral curve analysis of the features in the study area was performed and non-vegetated areas were excluded by using decision tree method. Since the same texture feature in each band had a certain autocorrelation, the principal component analysis method was used to reduce the dimension. In the end, 49 features including original band, vegetated band, texture feature could be achieved, then 3 models with different input which were classified by random forest method could be set up. The result showed that the model which used original band, vegetation index and decreased dimension texture feature had the highest accuracy. The total classification accuracy and Kappa index was 91.03% and 0.81771 respectively. Therefore, some conclusions were figured out: (1) the classification method based on multiple features was helpful to improve the accuracy; (2) the time series characteristics of vegetation index could help improve the classification accuracy of non-main crops; (3) decreasing the dimension of texture feature could improve the efficiency and cartographic quality of the classification.
Synthesis and Crystal Structure of 3-Bromo-2- hydroxybenzaldehyde-2-pyridinecarboxylic acid hydrazone
Authors: Zhao Meili 
Published: January 2021

Abstract
A new hydrazone compound, 3-bromo-2-hydroxybenzaldehyde-2-pyridinecarboxylic acid hydrazone (1), has been synthesized with 3-bromo-2-hydroxybenzaldehyde and 2-pyridinecarboxylic acid hydrazide as raw materials in the presence of magnesium chloride hexahydrate. The result of structural analyses shows that the compound 1 belongs to monoclinic, space group P121/c1 (no. 14) with a = 15.8346(13) Â, b = 6.9597(5) Â, c = 12.1912(13) Â, β = 109.123(10)°, V = 1269.4(2) Â3, Z = 4, Dc = 1.675 mg⋅m-3, μ = 3.239 mm-1, F (000) = 640, and final R1 = 0.0538, ωR2 = 0.0896.
Sensory analysis and amino acid evaluation of enzymatic hydrolysates of Chelydraserpentina meat
Authors: Wang Ruyi , Yang Zhao , Wu Ximei , Huang Chuangcheng , Ling Yeting , Li Xiaona 
Published: January 2021

Abstract

TheChelydraserpentinawas raw material, the meats of its back, legs, neck and tail were hydrolyzed by alkaline protease, and the hydrolysates of four different parts of meats were obtained, which sensory score, composition and content difference of total amino acid and free amino acid in hydrolysates werestudied. The results showed that the hydrolysate ofneck meat hasthe best sensory quality, with an overall score of 90. The contents of total amino acids and essential amino acids in the hydrolysate of leg meat were the highest, which were 28254.6 μg/g and 11031.7 μg/g respectively. The total amount of free amino acids in neck meat hydrolysate was 4559.2 μg/g. The content of glutamic acid in the free amino acids of four parts meat hydrolysate was the highest. The contents of umami amino acids, bitter amino acids and aromatic amino acids in the hydrolysate of neck meat were the highest in the four parts of meat hydrolysates, while that of sweet amino acids was the highest in the hydrolysate of back nail meat. Glutamic acid, histidine and phenylalanine are the free amino acids of TAV>1 in the leg meat.