bluuebunny/crossref_metadata_2025_split huggingface dataset:
Real-time monitoring software for electric vehicle battery power based on WeChat applet
Authors: Wang Anrui 
Published: December 2021

Abstract
Batteries are an important part of contemporary automobiles. With the increase in the output of family cars and the development of science and technology, the demand for batteries in the automotive market is increasing rapidly. A major problem with existing car batteries is that it is difficult for users to obtain information about the current battery power in real time, especially when driving away from vehicles and cars, there are huge safety hazards; therefore, a real-time monitoring of car battery power is researched. The system has important practical significance.
Three-Dimensional Geographic Information System Assisted Intelligent Review of Power Grid Design
Authors: Jin Yao , Tan Xiaozhe , Miao Linghou , Zhao Jie , Song Zhuoyan , Yu Wenxing , Xue Binglei , Shao Dongliang 
Published: December 2021

Abstract
In order to strengthen the management of the three-dimensional design review of power transmission and transformation projects, the Ministry of Infrastructure of the State Grid has successively issued the “Notice of Guiding Opinions on the Management of Preliminary Evaluation of Three-Dimensional Design of Transmission and Transformation Projects” and the “Preliminary Review Outline of Three-dimensional Design of Transmission and Transformation Projects (for Trial Implementation) )announcement of”. At present, most of the existing engineering design review systems are two-dimensional systems, which cannot visually display design results. In order to better display the results of three-dimensional design and improve review efficiency, it is necessary to apply GIS technology to the three-dimensional design of power transmission and transformation projects, and it is very necessary to develop a set of 3D GIS power transmission and transformation engineering design review system. In order to solve the above problems, the purpose of the present invention is to provide a method based on 3D GIS power transmission and transformation engineering design review, using 3D visualization technology to combine GIS with power transmission and transformation engineering design results to achieve visual browsing and query of 3D design models, and 3D design Achievement display,3D design results review and scoring,3D design model collision relationship calculation and other intelligent management applications.
Attitude stability control of micro-nano satellite orbit maneuver based on bias momentum
Authors: Xu Shuo , Lu Zhengliang , Zhang Xiang , Liao Wenhe 
Published: December 2021

Abstract
In this paper, an attitude stability control strategy based on cold air micro propulsion microsatellite orbital maneuver is designed. Firstly, the influence of environmental disturbance moment, uncertainty of rotational moment of inertia and thrust eccentricity moment on the attitude stability of the micro-nano-satellite is considered, and the attitude dynamics model of the micro-nano-satellite based on biased momentum wheel and magnetic moment device is established. Then, the disturbance moments such as environmental disturbance moments, rotational inertia uncertainty and thrust eccentricity moments are analyzed. In order to suppress the influence of various internal and external disturbance factors on the stability of the micro-nano-satellite during the deorbiting process, a robust adaptive sliding mode variable structure controller is designed. The designed robust adaptive sliding mode controller is able to compensate for various disturbances adaptively. The robust adaptive sliding-mode variable structure controller is designed with a reasonable distribution of torque considering the characteristics of bias momentum wheel control and magnetic control. Finally, numerical simulations are performed, and the simulation results show that the system has good robustness.
Tuning the electronic and magnetic properties of defect blue phosphorene by the adsorption of nonmetal atoms
Authors: An Guo , Chen Guoxiang , Chen Xiaona , Zhang Jianmin 
Published: December 2021

Abstract
Based on the first principles of density functional theory, the adsorption of nonmetallic atoms on the surface of defective blue phosphorene was investigated. The results show that the most stable sites of different nonmetallic atoms on the defect blue phosphorene are different. The nonmetal (B, C, N, O) atoms were adsorbed on SV and SW defects blue phosphorene respectively. It was observed that B, N adsorbed SV defect blue phosphorene systems exhibited semiconducting behavior, whereas O adsorbed SV defect blue phosphorene system exhibited metallic behavior, and C adsorbed SV defect blue phosphorene system exhibited magnetic semiconducting behavior. For SW defect blue phosphorene, the results show that B, N, adsorbed SW defect blue phosphorene showed magnetic semiconductor behavior, while C, O adsorbed SW defect blue phosphorene showed semiconductor behavior.
Research on Key Technology of Electrochemical Sterilization and Physical Application for Circulating Cooling Water
Authors: Wang Xiaohui , Song Chunyan , Xie Xueying , Zhang Nan , Guo Ruiqing , Zheng Hongyue 
Published: December 2021

Abstract
As a high-efficiency, low-cost, convenient and environmentally friendly sterilization technology, electrochemical disinfection has developed rapidly in recent years. Electrochemical sterilization is an environmentally friendly sterilization technology. The research progress of this technology in the recent 30 years in sterilization mechanism and electrode materials is summarized. The mechanism of electrochemical sterilization includes the chemical effects of active chlorine, active intermediates, copper or silver ions, and the physical effects of electric fields; the electrode materials used are titanium anode, carbon cathode, and anode. The article combined with electrochemical equipment in a thermal power plant cold open circulating cooling water treatment experiment. Experimental research found that under the conditions of current density of 120A/m2, residence time of 10s, and electrode spacing of 1.8cm, the bactericidal effect can reach 97%. Under certain experimental conditions and a certain period of time, the total number of heterogeneous bacteria in the circulating cooling water after treatment can be effectively inhibited.
Fault Tolerant Control of PMSM Three-Phase Four-Switch Inverter
Authors: Cao Yuan , Jing Fuzhi , Wan Heng 
Published: December 2021

Abstract
Permanent Magnet Synchronous Motor (Permanent Magnet Synchronous Motor, hereinafter referred to as PMSM) has the characteristics of small size, high efficiency, high power density and fast dynamic response, etc., and more and more applications in the transportation industry. This also has higher and higher requirements for the reliability and security of PMSM drivers. In this paper, the fault tolerant control strategy of PMSM based on three phase four switch inverter is proposed based on vector control and the simulation verification is carried out.
Study on temperature- microstructure- stress fields of thick-walled plate welded by hybrid laser arc welding
Authors: Zhang Hongjie , Han Tao , Wang Yong , Wang Bangyu , Chen Guangxue 
Published: December 2021

Abstract
The 25mm DH36 steel was welded by hybrid laser arc welding (HLAW), and a sequence coupled thermal-metallurgical-mechanical (TMM) model was developed based on SYSWELD. The temperature-microstructure-stress fields are predicted by simulation verified by experiment. The ratio between the arc and laser energy showed a significant effect on weld profile. The laser provided the main power and ensured deep penetration, and the arc power showed a dominant effect on the bead width of the hybrid weld during HLAW. For the hybrid welding of a thick-walled plate, the microstructure and thermal cycles varied along with the thickness. The weld profile and microstructure were experimentally characterized. The 3-pass welding procedure produced larger welding residual stress than the 9-pass welding procedure, and the process stability is poorer than the 3-pass welding process. Overall, numerical results matched well with experimental results.
Comparison of microstructure and mechanical properties of plastic mould steel for physical application
Authors: Sun Kangbin , Cai Yujun , Gu Liwen , Wu Zhenghuan , Huang Lifeng 
Published: December 2021

Abstract
In this paper, plastic mold steel S136 and S136 SUP were studied for microstructural observation and mechanical properties through metallographic, SEM, EDS, XRD, hardness test and impact test. The results showed that after the same heat treatment, the martensite structure of S136 SUP was denser, the carbides were more uniform and finer, and the hardness was slightly lower but the toughness was greatly increased compared with that of S136. the residual austenite content of S136 and S136 SUP were 2.46% and 10%, respectively, and the heat treatment hardness was 50.1 HRC and 49.1 HRC, respectively. The impact toughness was 90.6 J and 299.1 J.
Effect of Incremental Shrinking Process on Mechanical Properties and Microstructure of Alloy through Electron Backscatter Diffraction Analysis
Authors: Gu Zhengwei , Li Yusheng , Tang Ziming , Yu Ge 
Published: December 2021

Abstract
In recent years, the incremental shrinking process has been widely used in the forming process of aluminum alloy components for the railway vehicles. The effect of the incremental shrinking process on the performance and microstructure of 6082-T6 aluminum alloy was investigated through mechanical tests and electron backscatter diffraction (EBSD) analysis. The tensile test specimens prepared in different rolling orientations (0˚,45˚and 90˚) along the original and deformed sheets exhibited the mechanical anisotropy. After the incremental shrinking process, the average microhardness, tensile strength, and yield strength of this alloy were respectively increased by nearly 8.78%,2.26%,2.72%, while the Elongation was decreased by almost 31.67%. By analyzing the EBSD data, the strength of the material is increased by the incremental shrinking process and its mechanical anisotropy is improved, whereas its plasticity is greatly deteriorated.
Study on Spinning Process Parameters of the Copper Bushing by Tribological Properties and Physical Testing
Authors: Hong Xiaolu , Xu Hengqiu , Xu Ying , Huang Tao , Guo Yaming , Zhang Jiang , Peng Yinjiang 
Published: December 2021

Abstract
The bushing is a kind of ring sleeve which acts as a liner outside the mechanical parts, which needs good strength, hardness and fatigue resistance. In this paper, the copper bushing was prepared by spinning forming method, and the process parameters of spinning were explored. According to the results of material thermal simulation and test, the conclusion is that the spinning process of copper bushing needs to be carried out in two passes by reverse spinning method. The thinning rate is 30% and 25% respectively. The gap between the mandrel and the roller is 10mm, the feed ratio is 1mm/r, and the spinning temperature is 250°C.
Research on the physical properties and film removal mechanism of silver brazing flux by micro morphology analysis and X-Ray Diffraction
Authors: Zhao Yue , Long Weimin , Zhong Sujuan , Wang Luyi 
Published: December 2021

Abstract
The effect of KHF2 addition on silver brazing flux was studied in this paper. Results showed that the melting temperature of brazing flux would sustainably decrease with the increasing content of KHF2. KF could not be completely replaced by KHF2 in the brazing flux because it could restrain excessive spreadability, which was resulted from KHF2. F element in the flux replaced O element to form Fe2F5.
Research air gap on electromagnetic field of high speed motor under the influence of air gap
Authors: Wang Qi , Xing Shiyu , Ma Jian , Liu Aoxiang 
Published: December 2021

Abstract
High speed motor are mainly used in aerospace, petrochemical and NC machining fields. Complex electromagnetic field is distributed in the motor. With the continuous maturity of asynchronous motor technology, research on magnetic field has been rapidly developed. In this paper, the changes of air gap and magnetic field of high speed motor under different working conditions is introduced. The magnetic field model of high-speed motor with Maxwell electromagnetic which established theory through Ansoft finite element software. The distribution of electromagnetic field in the motor is explored. The results show that the magnetic field distribution of induction motor tends to increase with the increase of the air gap magnetic field. Therefore, this study has an important guiding significance for the motor.
Research on Trench Etching and Photolithography Process of SiC Trench MOSFET
Authors: Zhao Wanli , Ge Huan , Wu Peifei , Bai Xue , Wu Xiaowei , Zhu Tao 
Published: December 2021

Abstract
In this paper, the development of trench etching process and photolithography process for 6-inch 4H-SiC trench-type power MOSFET devices is mainly studied. Among them, the etching process successfully solved the anisotropy of dry etching of SiC, the different etching rates of different crystal planes, the difficulty of controlling the angle of the trench sidewall, and the easy formation of micro-trenches at the corners, etc. Successfully realized trenches with etch depth greater than 1.2um and sidewall angle greater than 90° in SiC. Subsequently, the trench was filled with SiO2 to achieve no holes in the trench after filling, and then the photolithography process was studied. Photolithography process is resolved at the trench coating, exposing and developing the non-uniformity problem, achieve a full and uniform coating, self-aligned trench overlay and the overlay accuracy of less than 0.1um, and there is no residue of photoresist in the groove after development. This article uses scanning electron microscope (SEM) to measure the morphology of the trench after etching and photolithography to characterize the experimental results, and the results meet the process requirements. The successful development of this process will facilitate the research and development of deeper trench-type power MOSFET devices.
Improved Electrical Characteristics of 1200V/20A 4H-SiC Diode by Substrate Thinning and Laser Annealing
Authors: Jiao Qianqian , Zhu Tao , Zhou Hang , Li Qingling 
Published: December 2021

Abstract
In this paper, two kinds of silicon carbide (SiC) backside metallization processes were developed, which were backside thinning combined with laser annealing to form ohmic contact and direct rapid annealing (RTA) to form ohmic contact. The specific contact resistivity obtained by both annealing processes was 3.4E-5 Ω·cm2 to 3.8E-5 Ω·cm2. In order to obtain the effect of thinning combined with laser annealing process on forward conduction characteristics of medium voltage devices,1200V/20A JBS diode was developed, and the backside contact adopted the above two annealing schemes, the thickness of 4H-SiC substrate is 200μm. According to the statistical results of hundreds of JBS diodes, the electrical characteristics of the two types JBS are basically the same. Compared with the JBS diode without substrate thinning, the forward conduction voltage (VF) of the thinned JBS diode is decreased about 0.048V. When the substrate of 1200V SiC JBS diodes is reduced to 80μm, the value of VF can only be reduced by about 0.0868V.
Remaining useful life prediction for lithium-ion battery based on the particle filter considering temperature effect
Authors: Han Yangyang , Ma Changlin , Ye Hui , Tang Shengjin 
Published: December 2021

Abstract
Temperature would affect the degradation process of lithium-ion battery. Therefore, considering the influence of temperature, this paper proposes method to predict the Remaining useful life (RUL) of the lithium-ion battery based on Arrhenius and double exponential model. And update the parameter by particle filter. Firstly, we establish a capacity degradation model with considering the influence of temperature, which is based on Arrhenius model and double exponential model. And then, in order to obtain the initial value of the parameters, we process the fitted the lithium-ion battery degradation data. Next, we use the particle filter (PF) algorithm to update the model parameters to realize the capacity estimation and the RUL prediction. Finally, according the experiment, we prove that the accuracy of the method proposed in this paper is better than that the method without considering the influence of temperature change. The result shows that the lithium-ion battery capacity degradation model established in this paper has great potential in the RUL prediction of the lithium-ion battery.
Comprehensive detection device and physical testing for mechanical properties of seabed sediments and shallow gas
Authors: Li Zhe Yun , Li Qing 
Published: December 2021

Abstract
In this paper, a comprehensive detection device for the mechanical properties of seabed sediments and shallow gas is designed, which is mainly composed of the seabed sediment mechanical properties detection part, the shallow gas detection part and the ultrasonic wireless transmission part. The mud water gas separation structure of the shallow gas detection part separates the shallow gas from the mud water, and then the methane concentration in the shallow gas is measured by the non-dispersive infrared methane sensor, which realizes the collection of the submarine shallow gas and the automatic real-time monitoring of the concentration. The measurement of the mechanical properties of seabed sediments realizes the real-time measurement of the three parameters of cone resistance, sidewall friction and pore water pressure, which characterize the mechanical properties of seabed sediments, through strain-sensitive elements. The ultrasonic wireless data transmission part is mainly for the data detected by the mechanical properties of the seabed sediments to be wirelessly transmitted to the sensor placement room through the ultrasonic transducer across the mud-water-gas separation structure. Finally, the data measured by the two parts are transmitted to the mother ship through the cable located in the sensor placement room. The experimental results show that it has the ability to comprehensively detect the mechanical properties of seabed sediments and shallow gas, and has strong operability.
Molecular dynamics simulation to enhance the mechanical and tribological properties of polyimide composites by graphene reinforcement
Authors: Chen Zhe , Li Aijiao , Liu Hong 
Published: December 2021

Abstract
Background: Polyimide is one of the organic polymer materials with the best comprehensive performance. It has outstanding mechanical properties, excellent thermal stability and excellent corrosion resistance, but pure polyimide has high coefficient of friction and wear rate. By combining graphene with polyimide, the mechanical properties of the composite are significantly reformatived, and the friction coefficient and wear rate can be reduced. Objective: The molecular models were developed to study the mechanical and tribological properties of graphene as a reinforced material. Methods: In this paper, the mechanical properties and friction and wear mechanism of materials are studied by molecular dynamics method from the microscopic point of view. The Young’s modulus and hardness of composites were calculated using the strain constant method. Results: Molecular dynamics simulation results expressed that the Young’s modulus and hardness of polymer composites benefited by approximately 115% and 42%, respectively, after the addition of the graphene-reinforced material. The average friction coefficient and wear rate of polymer composites fall by 35% and 48%, respectively. Through the calculation and statistics of the micro-information in the process of friction simulation, the internal mechanism of various situations is revealed in the atomic dimension. Conclusions: Graphene can adsorb on the surface of polymer chain segment, a strong polymer matrix, through van der Waals and electrostatic forces and can effectively resist external loading.
Theory and Calculation of Nontraditional Stable Isotope Fractionation
Authors: Han Zhenyu , Han Guilin 
Published: December 2021

Abstract
This paper conducts processing on isotope anharmonic effect with molecular dynamics method and Monte Carlo method based on path integration. It introduces the theoretical calculation method of pressure effect, and finally the nuclear volume effect and its theoretical calculation method, stressing that the nuclear volume effect is an important part of isotopic studies of heavy metals in the future. This paper makes an analysis on the equilibrium fractionation theory based on simple harmonic approximation.
Car Following Model and Algorithm Design based on Reinforcement Learning
Authors: Ren Jie 
Published: December 2021

Abstract
Based on reinforcement learning technology, this paper establishes a new driverless car following model. DQN algorithm and traffic simulator are mainly used to train the agent, and the following model is finally obtained. Under the precise and controllable experimental environment, the preset optimization targets can achieve the expected assumption and complete the following behavior. This study will contribute to the development of unmanned vehicles in the future.
Research on vehicle scheduling based on C-W algorithm
Authors: Wang Meng 
Published: December 2021

Abstract
Vehicle scheduling is one of the most important links in logistics distribution, a large number of demands also lead to logistics companies have to reasonably arrange the transportation of vehicle routes to save costs. By optimizing the distribution routes of vehicles, logistics companies can save transportation mileage and thus save transportation costs. In this paper,10 demand points of an agricultural products logistics company in Beijing are selected, and the location of the distribution center is obtained through the center of gravity method. Finally, the route allocation is completed by using the mileage saving algorithm, and the scheduling of transport vehicles is realized. The example shows that the mileage saving algorithm can optimize the vehicle route and realize route allocation.
Optimal path selection of multimodal transport based on Ant Colony Algorithm
Authors: Ge Dayun 
Published: December 2021

Abstract
In the process of multimodal transport, the cost and time of transportation are particularly important. In order to avoid unreasonable container transportation and unnecessary waste of transportation capacity and transportation cost, we must effectively integrate the advantages of various transportation modes, select the most suitable transportation mode and the most reasonable transportation path, and take the minimum cost and time as the goal to ensure the smooth transportation of goods to the destination. Therefore, optimizing multimodal transport network has very important practical significance. This paper starts with the multimodal transport network under a single task, designs the solution method of the model combined with ant colony algorithm, and gives an example. Finally, the model and algorithm design are proved to be reasonable by using MATLAB solution algorithm.