bluuebunny/crossref_metadata_2025_split huggingface dataset:
Advances of asphalt pavement runoff models
Authors: Wang Zhenlong , Wang Xiao , Ni Dong , Shao She-gang 
Published: March 2023

Abstract
It is of great significance to study the formation mechanism of pavement runoff for pavement drainage optimization and traffic safety. Based on the research achievements of pavement runoff at home and abroad, this paper summarizes the existing runoff models into three types: empirical model, theoretical model and hydrodynamic model, and the theories and methods of the above models are introduced and analyzed in detail. The hydrodynamic model allows for the pavement attributes and achieves a dynamic simulation of runoff hydraulic parameters. It effectively overcomes the disadvantages of the dependence of basic data by empirical model and the complicated solution by theoretical model and provides a more accurate method for studying the mechanism of runoff generation and flow concentration on asphalt pavement.
Broadband measurement method for acoustic performance parameters of large sample materials
Authors: Shi Shang , Lyu Shijin 
Published: March 2023

Abstract
In order to measure the acoustic performance parameters of large sample acoustic materials under water and eliminate the influence of wall reflection in limited space, the principle of inverse filtering and transfer function method is used to establish a wide frequency transfer function method for underwater materials under the vertical incidence of sound waves. The acoustic performance test of the 10mm uniform steel plate model shows that the broadband transfer function method is used to improve the measurement, and in the frequency band above 500Hz, the reflection coefficient test deviation is less than 0.1, and the sound insulation test deviation is less than 2dB. Effectively reduced the test limit of the broadband pulse method for underwater measurements.
Motion Response of Floating Platform Hoisting Impeller Based on Fully Coupled Model
Authors: Shi Xinghua , Zhang Wei , Ben Qingqing , Zhang Jing 
Published: March 2023

Abstract
Given the construction efficiency and operation safety of offshore wind turbine hoisting, it is necessary to study the motion response characteristics of a floating platform-hoist coupling system. Using SESAM hydrodynamic calculation software, a fully coupled model of a floating crane ship and fan impeller is established. The accuracy of the calculation model is verified by comparing the numerical simulation results with the pool experimental results. Based on this research, the sensitivity factors of floating crane ship motion are analyzed. The results show that the floating crane should choose the bow-top wave operation to minimize the rolling motion of the hull. The wind speed and the elevation angle of the boom have a great influence on the motion of the floating crane. The larger the wind speed, the greater the motion response of the hull, the smaller the elevation angle of the boom, and the larger the roll value of the hull. The higher the impeller height, the greater the motion displacement of the floating crane, but the influence is different on the hull motion under different working conditions. The results of the simulation analysis can provide a reference and basis for offshore wind turbine hoisting.
Effects of Welding Speeds on Microstructures and Properties of a CoCrNiSi0.2 Medium Entropy Alloy in Electron Beam Weld Joints
Authors: Zhang Li , Li Yuxin , Li Mei 
Published: March 2023

Abstract
As an excellent welding technique, the electron beam welding technology may easily melt certain refractory metals by the high energy generated during the electron beam welding process, thus obtaining well-formed joints with a large depth of fusion and small deformation. The technology has been applied to weld high- or medium-entropy alloys, and obviously improved performances of joints. In this study, the electron beam welding technology was used to weld a medium-entropy CoCrNiSi0.2 alloy. Microstructures of the weld joints and its quasi-static mechanical properties affected by changing the welding speeds were also studied. The research showed no obvious HAZ in the CoCrNiSi0.2 medium entropy alloy, and the weld zone and base metal present a single FCC phase. Furthermore, grain refinement occurs in the weld zone, and the hardness test shows that the hardness of weld zones are generally higher than that of the base metals correspondingly. In contrast to specimens at other welding speeds, the weld joints possess a higher hardness and a maximum tensile strength at 360 mm·min−1, a higher yield strength of the weld joints occured at 720 mm·min−1, and the fracture presents a form of ductile fracture.
The Study on Long-term Rutting Resistance of Compound Hot In-place Recycled Asphalt Mixture Based on MLS11
Authors: Zhou Qiwei , Zhu Huayang , Zhao Mengzhen , Wei Jifen , Wang ZHimei 
Published: March 2023

Abstract
In order to evaluate the long-term rutting resistance performance of recycled geothermal asphalt mixture, the accelerated loading test of long-term rutting resistance performance of recycled geothermal asphalt mixture was carried out by MLS11 (1/3 ratio accelerated loading equipment) under the environment of high temperature 60°C drying and high temperature 60°C water immersion, and was compared with the newly mixed AC-13 asphalt mixture. The test results show that, after loading 1 million times, the rutting depth of recycled asphalt mixture is 5.34mm and 4.87mm respectively, which is 0.68 times and 0.62 times of that of fresh asphalt mixture, and the rutting creep slope is 0.023mm/ 10,000 times and 0.026mm/ 10,000 times. The rutting depth of the recycled asphalt mixture was 4.22mm and 3.78mm, respectively, 0.76 times and 0.68 times of that of the fresh asphalt mixture, and the creep slope of the rutting was 0.024mm/ 10,000 times and 0.023mm/ 10,000 times. The coarse ore material gradation (small critical sieve pass rate) of the recycled asphalt mixture had the best long-term rutting resistance. In the high temperature 60°C water immersion environment, the edge deformation of the recycled asphalt mixture is 1.3 times and 1.1 times of that of the new asphalt mixture, and the long-term rutting resistance of the recycled asphalt mixture is more affected by the coupling effect of water temperature than that of the new asphalt mixture.
Research on the Microstructure of Laser Remelted As-sprayed TiB2-TiC0.3N0.7 based Composite Coating
Authors: Liu Caiyan , Mao Zhengping 
Published: March 2023

Abstract
Ceramic coatings with excellent properties of wear resistance, corrosion resistance, oxidation resistance, stability in acid and alkaline environments, and good bond strength with a metallic substrate, are widely used in different industries. Air plasma spraying has high energy and efficiency for depositing ceramic materials with a high melting point. Due to intrinsic porosity and mechanical bond strength between coating and substrate, laser remelting technology can be applied to the coating surface for improving coating properties. As-sprayed TiB2-TiC0.3N0.7-based composite coating was surface remelted by laser. The surface roughness of as-sprayed and laser-remelted coatings was measured. The phase composition and the microstructure as well as the Vickers microhardness of coatings were studied by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Vickers indentation instrument. It is found that the phase composition does not change after laser remelting. However, the surface roughness of laser-remelted coating is smoother than that of as-sprayed coating. And the microhardness on the cross-section is increased after laser remelting. There is a micro-crack in the laser-remelted coating due to the fast heating and cooling of the laser. The microhardness of the laser-remelted coating is increased with bimodal Weibull distribution.
A review of solid-state halide electrolyte matched LiCoO2 and Ni-rich NCM
Authors: Wang Jing , Lu Shigang , Wang Lijun 
Published: March 2023

Abstract
The energy issue is an important issue affecting the development of countries worldwide. To solve the problem of resource depletion faced by fossil energy, to cope with global warming, and to achieve sustainable development, the development, utilization, and promotion of new energy sources have received universal attention. Halide solid electrolytes have a stable oxidation potential above 4 V, matching the LiCoO2 cathode material with considerable electrochemical performance. This review addresses the electrochemical performance and possible problems matching solid-state halide electrolytes with LiCoO2 and Ni-rich NCM. This paper concludes that halides have electrochemical stability and high ionic conductivity at high potentials matching LiCoO2 and Ni-rich NCM and good electrochemical properties. However, whether surface reactions exist when it is matched to a high nickel ternary material with a high surface base content, the evolution of the interface between the high nickel ternary material and the halide electrolyte during cycling and the factors affecting the performance of Ni-rich NCM in halide solid-state batteries need to be further investigated.
Properties of AB5 type hydrogen storage alloy after α-AlH3 alloying
Authors: Ding Nan , Liang Fei , Liu Wanqiang , Wang Qingshuang , Cheng Yong , Wang Limin 
Published: March 2023

Abstract
AB5 type hydrogen storage alloys have been widely used in Ni-MH batteries due to their high electrochemical capacity, excellent rate performance, and low pollution. However, the high activation difficulty limited their development in the solid-state hydrogen storage field. Mechanical alloying to synthesize composites is an effective way to reduce activation energy. In this paper, the structure and hydrogen storage properties of the LaNi5+nAlH3 (n = 0, 1, 3 wt.%) composites were investigated. The results show that with the incremental of AlH3 alloying content, the lattice constant a, b, and c and the volume (V) of the LaNi5 unit cell tend to increase, the hydrogen absorption platform pressure of the composite material gradually decreased, and the hydrogen release platform pressure gradually increased. It resulted in a reduction in the hysteresis factor (Hf) of the composite from 0.66 to 0.35. This will reduce energy waste during energy conversion. In addition, the activation property of the alloy was improved after AlH3 alloying. This will facilitate the application of AB5 type hydrogen storage alloys.
Homogenization treatment and heat deformation behavior of cast ZK60 magnesium alloy
Authors: Liang Haicheng , Dong Ziming , Zhang Yupeng , Bai Yuhong 
Published: March 2023

Abstract
The casting ZK60 magnesium alloy was homogenized by different methods, and the best homogenization method was determined by observing the metallography. The stress and strain curves of casting ZK60 magnesium alloy after homogenization were obtained by hot a compression experiment. The thermal processing map of peak stress was drawn by the stress-strain curve, and by the analysis of the thermal processing map could distinguish the processing instability zone and safe zone of the casting ZK60 magnesium alloy.
The analysis of the jump ring on the surface of a thin wall copper tube by drawing with a floating plug
Authors: Liu Jinsong , Zheng Jiayi , Chen Dayong 
Published: March 2023

Abstract
The defect of the jump ring on the surface of the thin wall copper tube by drawing with a floating plug was analyzed, experiment was based on a direct reading spectrometer, metallographic microscope, SEM, and 3D surface topography instrument. Research shows that: when the plug position was over the extreme for-most position, the copper tube was extruded between the drawing die and mandrel, forming a localized necking state; when the plug position was over the extreme rear-most position, the copper tube was drawing in the empty sinking state. The plug does not play a finishing affection, which causes local projections of surface materials. The jump ring macro showed a ring bamboo section scar with bright and dark, micro performance for the uneven wall thickness.
Simulation and analysis of AZ80 magnesium alloy centrifugal casting
Authors: Liang Haicheng , Kang Jianming , Zhao Dazhi , Le Qichi , Liu Tianze 
Published: March 2023

Abstract
Centrifugal casting magnesium alloy pipe has been widely used. Still, because of its poor mechanical properties, it isn’t to meet the needs of the working environment, which limits its development in civil and industrial fields. Therefore, it is necessary to study the centrifugal casting process of magnesium alloy. In this paper, AZ80 magnesium alloy is used as the research material, and the numerical simulation of the centrifugal casting process is carried out by ANSYS Fluent software. The influence of different variable conditions on the solidification rate is analyzed, and a concept of defect ratio is proposed. The post-processing software is used to write an expression for macroscopic analysis of pore defect ratio on the outer surface of the casting, using which the influence of defect ratio under different variables is given. The research aims to guide the centrifugal casting experiment and predict the defects, greatly saving resources and costs.
Study on Mechanism of Titanium Slag Smelting in DC electric Arc Furnace
Authors: Huang Shihong , Long XianHao , Cui Yan , Zhang Liang 
Published: March 2023

Abstract
Based on the production practice of a 30MWA large DC electric furnace in Yunnan, this paper discusses the basic reactions in smelting titanium slag, and discusses the thermodynamic and kinetic behaviors of the main elements and impurities. The results show that the reduction reaction in the smelting process is carried out simultaneously in the multi-component system of Al2O3-CaO-MgO-SiO2-TiO2. The titanium slag containing more than 80% TiO2 can be obtained by enrichment smelting of ilmenite in a large high-power enclosed direct current electric arc furnace, and the output includes by-product pig iron. Impurities MgO, CaO and Al2O3 in titanium concentrate will not be reduced during reduction smelting; SiO2, MnO and V2O5 will be reduced in varying degrees, and the reduced products Si, Mn and V will dissolve in the metal Fe phase or be enriched in titanium slag.
Manufacturing of Mold Cavity of Micro-double Gear by WEDM
Authors: Li Wenming , Zhao Lei , Wang Gang , Zhou Changwu 
Published: March 2023

Abstract
Micro-double gear is an important component that transmits power or motion as one of the key components of micro-device. In order to realize the mass and industrial production of micro-double gear, an injection mold of micro-double gear was designed. The single factor experiment and orthogonal experiment were used to optimize the process parameters of wire cut electrical discharge machining (WEDM) for machining micro-double gear mold cavity insert at the maximum cutting speed. The results show that the influence of process parameters on cutting speed is successively N, Toff
and Ton
, and N has the most significant influence on cutting speed, which is the key factor. When Ton
=8µs, Toff
=3Ton
and N=5, the maximum cutting speed is 99.24mm2/min. The combination parameters of the maximum cutting speed were used to process the cavity insert of micro-double gear mold, and the cavity of micro-double gear mold was better fabricated.
Design and Optimization Key Structure of Planting Machine for Rock Wool Block Seedlings
Authors: Zhai Shaoyu , Ding Tao , Gao Guohua 
Published: March 2023

Abstract
Aiming at the problems of poor automation and low efficiency in tomato planting, this paper designed a fully automatic rock wool seedling planting machine. We designed the machine’s overall structure according to the agronomic requirements of tomatoes and the actual site. In addition, according to the uncertainty of contact between the rock wool block (RWB) and soil matrix, the corresponding motion behavior model after collision contact was established to predict the motion of RWB. The parameterized modeling of the soil matrix was carried out, and then a structure with an adaptive function was added to the original machine for optimization. The machine was processed, manufactured, and tested. The success rate of colonization was 99.4%, and the efficiency was 1500 per hour. The study can provide a reference for the automatic tomato planting machine design.
Flare folding wing tips for static and gust loads alleviation
Authors: Ye Bo , Yang Youxu , Cheng Zhiyong 
Published: March 2023

Abstract
The Passive gust load alleviation device can effectively simplify the control system by relying on the adaptive deformation of the structure. This research examines the influence of using folding wingtips during flight as a means of reducing static loads and gusty loads. Effects of hinge direction, wing-tip weight, stiffness and wing-tip centre of gravity on static and gust alleviation performance has been examined. The results show that the flare folding wing-tip can significantly reduce the static load and gust load of the aircraft. In a static aeroelastic trim analysis, a folding wingtip can increase span by 25% without increasing the wing root bending moment and decrease the trim angle of attack by 0.14°. In the gust response analysis, the maximum bending moment of wing root can be decrease by nearly 50% compared with the fixed wing-tip, only 17% higher than the baseline model without a wing-tip.
Design of Plc-based Pipe Pile Residual Slurry Recovery Equipment Control System
Authors: Zhao Heng , Zhang Lihua , Chen Kai , Chen Jingming 
Published: March 2023

Abstract
To solve the cost loss caused by the low recovery efficiency of pipe pile residual slurry, as well as the pollution of the environment during discharge, a control system of pipe pile residual slurry recovery equipment is designed. The equipment is controlled by PLC (Programmable Logic Controller), aiming at the problem that the traditional PID (Proportion Integration Differentiation) cannot modify the parameters in real time to meet the accuracy requirements of the residual slurry density. The fuzzy PID controller algorithm is proposed, and the simulation analysis is carried out by MATLAB at the same time. Through PLC selection, PLC I/O allocation, electronic control system design, program writing, and HMI (Human Machine Interface) establishment, the information interaction is achieved between equipment and people while monitoring the production process. Through on-site production tests, the equipment is proved to be reliable and efficient, which can make the residual slurry recovery utilization rate reach more than 90%, and reduce the production cost of pipe piles.
Vibration characteristics of gear system with a cracked-gear tooth: modeling and experiments
Authors: Zhao Songtao , Ma Hui , Jiang Yuting , Wang Yaping , Fu Kunkun 
Published: March 2023

Abstract
Gear tooth crack failure is a cruel problem in the gear transmission system. The research on the simulation and experiment is the hotpots in the field. The theoretical and experimental investigations on the vibration characteristics of a gear system with a cracked gear tooth are carried out in this study. A finite element (FE) model is built to predict the crack propagation path in a gear tooth and determine the time-varying mesh stiffness (TVMS) of gear pairs. A dynamic model of the gear system is developed using the lumped-mass model. The established models are validated by comparing the computing results with experimental ones. The influences of crack length on TVMS and vibration characteristics of the gear system are analyzed in detail. The proposed methods can provide useful guidance for fault diagnosis and dynamic performance evolution prediction of a gear system.
Reliability Analysis of Diesel Engine Connecting Rod Threaded Connection Based on ANSYS
Authors: Hu Fengyan , He Qiang , Fu Bofeng , Zhao Ming , Yang Ming 
Published: March 2023

Abstract
Connecting rod bolt is the key component of the diesel engine crank connecting rod mechanism, and the phenomenon of stress concentration at the thread easily occurs in the working process of the crank connecting rod, due to the characteristics of the threaded connection. In order to improve the quality of the threaded connection of the diesel engine connecting rod, the connecting rod’s big end threaded connection structure is numerically simulated based on ANSYS finite element analysis software through the combination of theoretical analysis and numerical simulation. The stress distribution of different pitches, threaded connection length and bolt preload are analyzed, and the effects of different factors on the strength of threaded connection structure are obtained. The research results have important engineering application value for improving the reliability of the threaded connection and ensuring the safe operation of the diesel engine connecting rod mechanism.
Analysis of Plane Displacement of Pressure Vessels with Defects
Authors: Feng Xiu , Bao Shuo 
Published: March 2023

Abstract
Aiming at the problem that the internal defects of the pressure vessel are not easy to detect, the out-of-plane displacement method is used to study it. The out-of-plane displacement field of circular flat plate heads with defects is obtained by the method of elastic theory analysis and compared with the finite element method to verify the accuracy of the finite element method. Based on the finite element method, the effects of vessel material, pressure load, defect shape, and defect size on the first-order out-of-plane displacement derivative are studied. The results show that the material of the container has little effect on the out-of-plane displacement. The first derivative of out-of-plane displacement increases linearly with the increase of pressure, and this relationship will not change with the increase of pressure. With the increase of defect aspect ratio, the maximum value of the first derivative of out-of-plane displacement increases gradually. When δ ˃ 9, the defect is detectable. The research results lay a theoretical foundation for the internal defect detection of pressure vessels based on digital speckle shearing interferometry.
Design and optimization of a permanent magnet crawler for a marine wall-cleaning robot
Authors: Feng Yuyong , Guan Dianzhu , Deng Haoyun , Wang Xianhui , Song Xincheng 
Published: March 2023

Abstract
At present, ship wall cleaning is important in the marine engineering equipment maintenance industry. Designing permanent magnetic adsorption units is one of the most important ways to implement efficient, environmentally friendly, high-quality ship cleaning work. In this paper, theoretical design tests and technical studies are carried out on the permanent magnetic crawler structure of the ship cleaning and wall climbing robot, and the adsorption method, walking method, magnetic material and permanent magnetic adsorption structure of the ship cleaning and wall climbing robot are comprehensively analyzed and selected. Finally, the design of the permanent magnetic crawler for the ship cleaning and wall climbing robot is proposed.
Research on the Braking Control Strategy of Automobile Driven Independently by Front and Rear Dual Motors
Authors: Du Xiaofang , Li Shiqing 
Published: March 2023

Abstract
Regenerative braking is one of the most important methods to solve the difficulty of energy loss in city driving. The dual-motor pure electric vehicle is considered to be the object of study with the goal of energy utilization of the reproductive system of braking. The PSO (particle swarm optimization) algorithm is adopted to solve the problems under these constraints of ECE-R13 braking regulations and I-curve. The results of the simulation indicate that compared to the conventional braking tactic of AVL CRUISE, the energy renewal effect of the steering strategy is raised by almost 19.24% and the driving distance is increased by as much as 23.8%.