bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Critical Designing Problems of SMA-10 Bridge Deck Pavement
Authors: Yin Feng , Jia Zengrong , Liu Jie , Yang Fei 
Published: March 2021

Abstract
This paper mainly discusses the volume characteristic change trend of SMA-10 as ultra thin friction course under different gradation design conditions. Marshall compaction results shows that air void is relevant to 2.36mm-4.75mm gravel content. Skeleton structure analysis indicates that 2.36-4.75mm gravel content below 15% is suitable. We can choose designing gradation with 2.36mm or 4.75mm as control point. 1.18mm aggregate interference effects apparently for 2.36mm sieve pore as break point (BP). Road performance of SMA-10 meets the demands when gradation is designed according to the research conclusions.
Exploration and Thinking on Collective Protection System of Floating Nuclear Power Plant
Authors: Liu Le , Luo Qingsong 
Published: March 2021

Abstract
Demand and development for nuclear emergency interventions and protective actions for floating nuclear power plants, Combining the collective protection systems and their functions of the monitoring system, the protection system, the washout system and the control system of the nuclear, chemical and biological weapons of large warships, To provide reasonable nuclear emergency facility support for the construction of floating nuclear power plant nuclear accident emergency plan. It provides a theoretical basis for the nuclear emergency plan of floating nuclear power plant at sea, as well as the collective protection system of floating nuclear power plant, to give full play to the functions of collective protection equipment.
Study on Anti-overturning self-locking device of CRDM for Offshore Nuclear Power Platform
Authors: Luo Qingsong , Xu Huaijin , Liu Le 
Published: March 2021

Abstract
The offshore floating nuclear power plant is an organic combination of offshore ship platform engineering and nuclear power engineering. Its operation is affected and restricted by marine environmental conditions. Under extreme sea conditions, serious nuclear safety accidents can be caused by the capsizing of ship platforms. The passive anti-overturning self-locking device proposed in this paper can lock the drive rod connected to the control rod when the platform overturns, preventing the control rod from exiting the core and ensure the safety of the reactor core. The test results show that the control rod self-locking of the control rod driving mechanism can be realized after the tilt of the ship platform exceeds 90 degrees. It is an important means to ensure nuclear safety and efficiency for offshore floating nuclear power plant under the overturning condition of the ship platform.
Strategic Analysis on innovation of enterprise statistical management under the new economic environment
Authors: Wang Linghong 
Published: March 2021

Abstract
With the continuous development of China’s social economy, China’s economy has entered the transition period. The change of economic situation makes our socialist market economy enter a new environment. In the new economic environment, enterprises should realize the importance of statistical management, and take statistical management as the development strategy of enterprises, so as to improve their core competitiveness. Based on this, this paper analyses the strategy of enterprise statistical management innovation under the new economic environment, aiming at promoting enterprises to constantly innovate statistical management mode, so that enterprises can better adapt to the new economic environment.
Research and dynamic analysis based on nonlinear identification of sports goods Econometrics
Authors: Yang Chunhua , Zhang Wanjun , Zhang Feng , Gou Xiaoping , Zhang Jingxuan , Zhang Jingyi , Zhang Jingyan 
Published: March 2021

Abstract
On the basis of literature research, this paper analyses the sports econometric analysis method, discusses the contribution of sports goods sales and economic growth in China, and analyses the dynamic relationship between them. In this paper, a nonlinear identification algorithm based on the econometric economics of sporting goods is proposed, and a nonlinear identification model based on the econometrics of sporting goods is established. Finally, through the MATLAB simulation analysis, the results show that: sports goods econometric nonlinear 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 the nonlinear identification method of sports econometrics, and provide reference for the stable development of sports economy.
Effect of long term aging on Microstructure and precipitates of valve bolts in power plant
Authors: Wang Jiawei , Li Qingsong , Gong Xiufang , Yang Wensheng , Wang Tianjian , Gao Zhenhuan 
Published: March 2021

Abstract
10Cr11Co3W3NiMoVNbNB is used as the materials of Intermediate Pressure Control Valve, High Pressure Control Valve, and Main Stop Valve in some thermal power plant. After 45,000 hours of operation, the mechanical properties of this those materials has have been decreased greatly. By means of scanning electron microscopy, transmission electron microscopy and thermodynamic software simulation analysis, the conclusions can be drawn: under this operation environment, the coarsening of martensite lath and the dissolution-reprecipitation of second phases such as M23C6 carbides and MX phases are the main reasons which result in the decrease both in the room mechanical properties and high temperature mechanical properties of materials.
Feasibility Verification of Portable Intelligent Gauge Calibrator
Authors: Chen Hao , Zou Wenzhe 
Published: March 2021

Abstract
The current gauge calibrator has a series of problems, such as large volume, difficult to carry, low level of intelligence. As an improvement of the traditional gauge calibrator, a new portable intelligent gauge calibrator is designed. In this paper, based on the new type of gauge calibrator, it is compared with two traditional gauge calibrators to verify the feasibility of its application to the verification of grade 2 gauge.
Microstructure and wear resistance of Fe-based, Co-based and Ni-based coating of AISI H13
Authors: He Bing , Wang Jing , Yun Xiao , Chen Zhikai , Zong Xuemei 
Published: March 2021

Abstract
H13 coating, Stellite156 coating and WC/Ni62 composite coating were prepared on AISI H13 hot working die steel by laser cladding. By means of metallographic microscope, scanning electron microscope, microhardness tester and friction and wear tester, the microstructure, hardness and wear resistance of H13 and three cladding layers were compared and analysed. The results show that H13 alloy coating, Stellite156 alloy coating and WC/Ni62 composite coating all show good metallurgical bonding characteristics with H13 steel substrate. The H13 alloy coating is mainly composed of white reticular dendritic, black intercrystalline carbide, martensite and residual austenite; the Stellite156 alloy coating is mainly composed of primary γ-Co dendrites and eutectic tissues; the WC/Ni62 matrix composite coating is mainly composed of WC particles, dendrites and fine eutectic tissues. The average microhardness of the three cladding layers is obviously higher than that of the substrate. WC/Ni62 composite coating has the best wear resistance under dry wear conditions.
Blind Source Separation Method of Dual-Channel Single Vibration Signal Based on Power Spectral Density
Authors: Fan Ruxin , Wang Jiaqi , Su Jindi , Feng Yelei 
Published: March 2021

Abstract
In this paper,a convolution-mixing model of vibration signal is established according to the actual vibration signals collected by the sensor. This model is simulated and separated in P-waves and S-waves by using the frequency domain convolution blind source separation algorithm based on power spectral density matrix and diagonalization, and separated the vertical and horizontal waves of the actual two-channel underground vibration signals, which lays a technical foundation for the study of seismic characteristics and the inversion of source location.
The caculation of acoustic field of the cylinder and smooth surface in bistatic
Authors: Meng Zhaoran , Wang Xiaofeng , Lv Zhenwang 
Published: March 2021

Abstract
The scattered field in bistatic of cylinder and smooth surface are calculated according to Kirchhoff approximation, as well as the stabilization phase method is considered in the calculation. The result of scattered field of cylinder contains multiple cases where the transceiver is separated. While the result of smooth surface can be generalized to spherical targets and flat targets.
Thermal Radiation Superimposed Hazard Analysis of Elevated Flare under Accident Condition
Authors: Di Liu 
Published: March 2021

Abstract
In order to ascertain the hazard of thermal radiation during the overhead flare combustion under accident conditions in an enterprise, the CFD simulation is used to obtain the thermal radiation superposition nephogram under the water failure of the whole plant with two flare discharge and combustion at the same time. According to the regulation of maximum operating heat radiation value of flare system in Standard SH3009 -2013, the influence range of different thermal radiation intensities is calculated, which provides a basis for the height design of overhead flare system and the determination of reasonable safety distance between elevated torch system and surrounding facilities and personnel concentration places.
Development of Vehicle Domain Controller Based on Ethernet
Authors: Zhou Xuan , Wang Kai , Zhu Long , Huang Shuai , Han Guangsheng , Yu Jie 
Published: March 2021

Abstract
The ‘new four modernizations’ of automobiles with the trend of electrification, intelligence, network connection and sharing has brought new challenges to the electrical/electronic architecture of vehicles. The topology of the vehicle has changed from distributed ECU development to the centralized oriented domain controllers and central computers; the function of the whole vehicle has been changed from decentralized software development to the development of a unified software architecture for aggregation. This paper studies the Ethernet-based on-board domain controller and expounds the research method for the unified architecture platform. Based on the SOA model, it discusses the definition of services based on SOME/IP, the software architecture, the hardware topology, and communication layer parameters; and builds a domain controller hardware platform, and simulates the development content in the later stage to form a complete Development process of Ethernet-based on-board domain controller.
Trajectory Planning and Control of Handling Robot Manipulator
Authors: Zhang Xing , Kou Hao , Zhang Yi , Jan Kaina , Ivanovic Boris 
Published: March 2021

Abstract
In view of the lack of automation of the current material handling measures, based on a brief introduction to the structure of the handling robot, this article mainly studies the trajectory planning and control of the manipulator. First, the basic structure of the manipulator is simplified, the joint coordinate system of the robot arm is established by the Denavit-Hartenberg (D-H) method, and then the kinematics forward and inverse solution model is obtained by analysis. The fifth-order polynomial interpolation algorithm is used to plan the space trajectory of the rotating joint, and Matlab is applied to perform modeling and simulation to verify the rationality of the robot structure design and obtain the motion trajectory and each rotation of the mechanical claw end in the space rectangular coordinate system. Experiments on the motion curve, velocity curve and acceleration curve of the joint are implemented. Finally, the manipulator is controlled by the single-chip microcomputer, and the theoretical model data and trajectory are practiced. Practical results show that the control after trajectory planning reduces the loss of the manipulator and the overall accuracy and stability are higher.
Research on the Maintenance and Common Failures of the Marine Machinery and Equipment of the Scientific Investigation Ship
Authors: Gong Qiyong , Zhan Jun , Su Xiaoliang , Liu Chenglong , Zheng Jian , Wang Ning 
Published: March 2021

Abstract
The reliability, maintainability and effectiveness Ships, machinery and equipment, maintenance, failure of various mechanical equipment is essentially the reflection of the state of this type of repairable system at different stages in the same random process. Scientific investigation of ship machinery and equipment maintenance is an important part of ship maintenance, which has a greater impact on the entire ship’s running quality and service life. This article analyses the common problems in the maintenance of marine machinery and equipment through the explanation of the significance of the maintenance of marine machinery and equipment, and takes the gas turbine as the research object, and specifically analyses its failure repair measures. It is hoped that the safety and quality of ship operations can be further improved, while ensuring the safety of the lives of the ship’s passengers, it also provides assistance for follow-up research on relevant content.
Overview and Research on Mechanical Drive Empty Return and Its Influence Mechanism
Authors: Yu Kaiping , Si Dongya , Luo Tianfang , Pan Yuancheng 
Published: March 2021

Abstract
The length of transmission chain and the empty return of mechanical drive from motor to turret cause different height and orientation of tramission route for the receiver unit and the turret, thus affecting the aiming and firing accuracy of artillery auatomatic aiming system. In an effort to solve the problem, taking a certain type of artillery aiming system as the research object, the article systematically analyses the feature of empty return of mechanical drive and its influence mechanism, providing technical support for the improvement of the feedback accuracy and the aiming accuracy for the artillery aiming system.
Design of automatic measurement system for direct fire shell impact point
Authors: Yan Jun , Chen Xiangchun 
Published: March 2021

Abstract
Aiming at the problems of traditional manual detection of gun firing, such as hidden danger, poor accuracy and low efficiency, this paper proposes an automatic measurement system for the impact point of direct fire shell. Based on the acoustic positioning principle, collimation noise shielding technology based on slit, distributed sensing and coordinate conversion method, the impact is realized by integrating the time difference of shock wave arrival and the geometric relationship between sensors the accurate detection of points can improve the rapid detection ability of artillery performance test and firing training.
Analysis of the Response of Transmission Line Network under Electromagnetic Pulse
Authors: Wang Xutong , Guo Jinghai 
Published: March 2021

Abstract
Power system transmission line is a very complex network. The response of cable terminal is very different from that of single line. In order to accurately predict the terminal response of the cable under the nuclear electromagnetic pulse, a convenient method is needed to calculate the response of complex network. Based on the state equation method and the extrapolation method, the transmission line is equivalent to the current source or voltage source. Matlab program and Simulink are used to calculate the induced current generated by the cable terminal. The results are compared with those of CST cable studio. The results of CST show that the method is correct.
Effect of temperature on magnetic and dielectric properties of Mg-Cd-Ga ferrites for high-frequency-range antennas
Authors: Gan Gongwen , Zhang Dainan , Li Jie , Wang Gang , Yang Yan , Wang Xueying , Zhang Huaiwu 
Published: March 2021

Abstract
Mg ferrites with magnetic and dielectric properties are widely used composites to stabilize spinel structure. This study investigates the effect of sintering temperature (900°C, 915°C, 930°C, 945°C, 960°C) on the magnetic and dielectric properties and low-loss characteristics of Mg0.7Cd0.3Fe1.92Ga0.08O4 composites with 5 wt.% Bi2O3 addictive. The change in temperature enhances magnetization (saturation magnetization Ms from 24.37 emu/g to 33.12 emu/g), hence increasing permeability. The real permeability (μ’) of Mg-Cd-Ga ferrites was examined to be monotonically increasing from 15 H/m to 19 H/m. And the real part of permittivity (ε’) was fine-tuned by increasing temperature. As a result, at 920°C,μ’ and ε’ are closely equivalent ranging from 1 MHz to, this characteristics can be used for miniaturization and good radiation behaviors antennas. In addition, very low magnetic (tanδμ
~3*10−2) and dielectric (tanδε
~5*10−3) tangent enable excellent radiation efficiency at operation.
Analysis on the operation condition of Rubber belt CVT of baja Racing car
Authors: Ai Tianle , Xiao Siying , You Zhanpeng 
Published: March 2021

Abstract
baja racing is a kind of simple off-road racing originated in the United States, is the predecessor of Formula Student racing. This article through to the baja racing rubber belt type stepless transmission, for its mechanical characteristics, temperature characteristics and movement of the thermodynamic conditions of resonance are analyzed when the validation, thus more clearly the working characteristics of the rubber belt type stepless transmission to optimization design in after the game, make it can match various complex conditions of movement and maintain maximum speed ratio. This paper USES CATIA to establish the model, USES the MODAL module of ANSYS WORKBENCH to carry out the 12-order MODAL analysis, USES STATIC STRUCTURAL to carry out the force analysis, USES Steady State Thermal to carry out the analysis of the temperature change when the rubber belt stepless transmission works, and USES Matlab to carry out the simple automobile vibration simulation analysis. Finally, the conclusion is drawn and the design optimization analysis is carried out, so that the rubber belt CVT can achieve better dynamic performance and structural stability.
Design and Experiment of a Teaching Tool for Oval Gears with Variable Transmission Ratio
Authors: Huang Zhidong , Zhi Shan , Shi Chunyang 
Published: March 2021

Abstract
The basic theory of oval gear is studied. The teaching tool with variable transmission ratio of oval gear is designed. On the premise that the center distance remains unchanged, the parameter law of oval gear is clarified, and finally oval gear mechanism parameters of meeting the constraint conditions of box body are obtained. The effectiveness of the teaching tool design method is verified by experiments, which facilitates the standardized design and application of oval gear.
Study on dynamic flashover characteristics of iced insulators
Authors: Yang Xiaojuan , Li Jing , Liu Shuxin , Yu Longbin , Cui Juyong 
Published: March 2021

Abstract
In this paper, based on fxbw4-10/100 insulators, the flashover dynamic characteristics of iced insulators are studied. The insulators are artificially iced and flashover experiments are carried out with water of different conductivity in the laboratory, and different flashover voltages are obtained. The dynamic changes of insulator temperature field, electric field and potential are simulated by using finite element software. Finally, the influence of different physical parameters on insulator flashover characteristics is studied.
Residual Stress Analysis of Laser Welding Between Output Needle and Helix
Authors: Su Wei , Luo Wenhao , Dong Xianshan , Liu Renhuai 
Published: March 2021

Abstract
In order to obtain the welding stress of the output needle and helix, a finite element model is established and the mesh at the weld is refined to evaluate the welding residual stress. ANSYS parameter design language is used to simulate the motion load of welding heat source. Based on the exact calculation of the temperature field, the corresponding thermal units are converted into structural units to calculate the welding residual stress. Finally, the thermal stress distribution curve and residual stress distribution trend are obtained after post-treatment.
Research on Power Amplifier Based on Envelope Tracking Technology
Authors: Chao Guo , Fei Yang 
Published: March 2021

Abstract
With the development of mobile communication technology, the envelope bandwidth and power peak-to-average ratio of radio frequency signals are gradually increased. However, the power consumption requirements of electronic equipment are difficult to meet by traditional constant voltage power amplifiers. The mode of dynamic voltage supply is adopted by the envelope tracking power amplifier, which can make a good balance between the linearity and efficiency of the power amplifier system. The fundamental of envelope tracking power amplifier is shown in the article. Transistor model is selected to design the power amplifier, ADS and other tool software are used for simulation. The feasibility of envelope tracking technology is verified in improving the efficiency of power amplifier.
The Effect Evaluation of Labor Protection Equipment Allocation in Power Supply Enterprises: A Study of Central Provinces in China
Authors: Zhu Baoyu , Liu Sen , Li Hongyan , Gao Yang , Chen Tao , Sun Chengxun , Li Wei 
Published: March 2021

Abstract
The allocation and correct use of labor protection equipment is an effective means to reduce occupational hazards and emergencies in special industries. Constructing allocation effect index system of labor protection equipment in the power supply enterprises, this study comprehensively evaluates personnel Labor protection equipment allocation situation, and diagnosis allocation of the whole process of the lack of links. The evaluation results show that, taking a central province as an example, the overall score of labor protection equipment in power supply enterprises is 75.76, which can meet the basic needs of operators. At the same time, some deficiencies are found including that the effectiveness of labor protection equipment allocation system is somewhat deficient, the workers’ cognition for labor protection equipment and occupational health protection needs to be improved, and the aesthetics and comfort of labor protection equipment still have room for improvement. The research results provide an effective reference for the development of electric power industry and the status assessment of other industries.
Effect of tantalum doping on blistering behavior and retention in tungsten exposed to deuterium plasma
Authors: Zhou Hang , Jiao Qianqian , Liu Rui , Liu Chaozhang , Yan Shumin , Chen Xinhua , Feng Guodong , Zhang Huanyun , Li Li 
Published: March 2021

Abstract
Pure tungsten and tungsten tantalum (5 wt% ta) were prepared by powder metallurgy method, and then 40 eV deuterium plasma was injected into a linear plasma device with 1.08 × 1026 D/m2 energy. The irradiation properties of pure W and W-5%Ta were compared by a set of supplementary analysis techniques. The results show that adding proper amount of tantalum can effectively reduce the foaming caused by deuterium. In addition, TDS results show that the main desorption peak of pure tungsten is about 650 K, and the shoulder is at 730 K. For W-5%Ta alloy, the main desorption peak is about 810 K, and the deuterium retention in pure W is 4 times of that in W-5%Ta alloy. In addition, we also measured the hardness of pure W and W-5%Ta, which are 4.3 Gpa and 7.3 Gpa, respectively. The above phenomenon is due to the change of the microstructure and composition of the material.