bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structure Design and Research on a New Tire Emergency Inflation System
Authors: Rui Jingmin , Xu Yang , Zhu Qingsong , Liu Lihong , Yao Jia 
Published: April 2020

Abstract
Tire burst is huge harmful, a new tire emergency inflation system was put forward based on the airbag technology to reduce the harm of tire burst in this paper. Firstly, the pyrotechnic gas generator and its matching wheel hub were designed, the tire emergency inflation system model was established and the inflation process was simulated. The results show that the numerical model of tire emergency inflation system can well simulate the inflation process after tire burst. The peak time of gas production has little effect on the peak pressure of gas in the airbag after inflation. The peak time of gas production is different, but the final pressures in the airbag are all about 250 kPa, meeting the performance requirements. Therefore, the function of tire emergency inflation system designed can be realized.
Track Design of Track-Wheel Transport Vehicle and Strength Analysis of Important Components
Authors: Yang Yuchuan , Cai Tong , Xu Xiaojun 
Published: April 2020

Abstract
Through the comparative analysis of different types of transport vehicles, the paper puts forward the concept of Track-Wheel transport vehicles and expounds the crawler travel mechanism of the wheel-shift interchange transport vehicles. It is concluded that the Track-Wheel transport vehicle has the advantage of operating in harsh environments such as mud and sand. The article designs the track mechanism and focuses on the strength checks of the important components of the track walking mechanism, namely the track, the load wheel and the load wheel axle. And it is concluded that under the maximum load, the track, the load wheel and the load wheel axle can meet the bearing requirements.
Research on the Rupture of Certain CNG-II Gas Cylinders during the Leak-Before-Break Test
Authors: Xiong Shutao , Huang Song , Li Bin , Zhao Zhongguo 
Published: April 2020

Abstract
We are studying the Leak-before-break (LBB) test, which is an important test for the safety performance verification of CNG-II bottles, and it is a necessary link for new product identification. We ruptured during the LBB test of a CNG-II gas cylinder. Through the chemical composition analysis, metallographic observation, mechanical performance test, scanning electron microscope and other tests of the failed gas cylinder, we found that the cylinder failure was due to the curved part. There are oxide slag inclusions. Under the fatigue test under the action of alternating load, slag inclusions are used as the fatigue source, which accelerates the crack growth and eventually causes the cylinder to fail.
Simulation and Analysis of a Kind of Gas-Liquid Linkage System Based on Response Surface Method
Authors: Bao Zhongfu , Zeng Dejiang 
Published: April 2020

Abstract
The simulation analysis is carried out for a kind of gas-liquid linkage system composed of gas-liquid conversion cylinder. Firstly, the dynamic characteristics of hydraulic system, pneumatic system and pneumatic hydraulic system are compared. Then through batch analysis, the influence of the design parameters of the gas-liquid converter on the system is analyzed. Finally, by using the method of experimental design, the influence of the main parameters of the gas-liquid combined system on its dynamic characteristics is clarified, which provides the basis for the subsequent design and development.
The Design of Gantry Welding Production Line System Based on PLC
Authors: Yuan Junfeng , Tian Chenghua , Li Hui , Wang Haitao , Zhou Chunlin 
Published: April 2020

Abstract
This paper introduces the composition of the mast welding production line, and designs the process flow of the production line. With Siemens S7-300 PLC and ET200SP as the core, this paper designs a production line control system is designed. In addition, this paper expounds on the hardware design and software design of the PLC system in detail and describes the communication methods between the PLC and the robot, and programming is conducted based on modular programming, thus making the system become stable and scalable.
Fatigue life prediction method of mechanical parts based on Weibull distribution
Authors: Wang Yang , Peng Zhiling 
Published: April 2020

Abstract
Aiming at the randomness of fatigue life of mechanical parts, the reliability analysis and fatigue life prediction of mechanical parts are carried out through the Weibull distribution of three parameters. The process of solving the complex transcendental equation is analyzed, and the method of solving the likelihood function by unconstrained optimization method is proposed to estimate the values of the three parameters of Weibull distribution. A complete and accurate Weibull distribution model was established to analyze and calculate the data of gear tooth fracture, and the accuracy of the model was verified. The fatigue life of mechanical parts could be predicted by this model.
Study on Mechanism of Heating Temperature Field of Aluminum Foil Seal
Authors: Xin Chuanqi , Sun Shibo , Liu Jinming 
Published: April 2020

Abstract
The theoretical basis for non-contact sealing detection is lacking for the sealing performance of aluminum foil sealing. First, simulation and analysis of heat transfer characteristics of aluminum foil seals in heating temperature field using ANSYS software. The temperature field image sealed by aluminum foil is a closed and uniform annular region with high temperature. In the temperature curve, the temperature is concentrated at 70~80 celsius. It has symmetry characteristics, and there are 2 high temperature peaks; the other 5 are unlooped or uneven thermal image aluminum foil seal failed. A comparative experiment was then carried out to collect infrared thermal images of different types of aluminum foil seals under electromagnetic induction heating. Experiments show that the surface temperature field distribution calculated by the three-dimensional finite element simulation is consistent with the experimental temperature-field distribution. According to the distribution characteristics of the thermal temperature field, it can be evaluated the state of the sealability of the aluminum foil seal, and it can provide theoretical support for further optimizing the automation degree of the non-contact sealability test.
Research on Key Technologies of the General Module Library of Aeronautical Composites Production Line
Authors: Li Hui , Zhang Chao , Cui Jing 
Published: April 2020

Abstract
System simulation technology has become more and more widely used in aviation manufacturing industry. A general module library for aeronautical composites production line was developed, according to the characteristics of the production line layout and production process, combined with practical engineering experience. Based on it, the simulation analyst can create models for different types of composite material production lines quickly and easily, and can do the layout simulation evaluation, bottleneck research and scheme quantitative comparison and so on. Moreover, a demonstration usage of the module library for a practical case was given.
Study on the Adsorption of Methyl Red by Bentonite / Chitosan Composites
Authors: Xiang Pengzhi , Deng Chao , Liu Longjiang , Huang Yao 
Published: April 2020

Abstract
A composite material is formed by using chitosan and bentonite under the condition of dissolution with acetic acid. The material was characterized by scanning electron microscope thermogravimetric analysis and infrared spectroscopy. The effects of initial concentration of methyl red, adsorption time, pH, and amount of adsorbent on adsorption were investigated. Then, the adsorption process was analyzed from kinetics, and related parameters were calculated. The results showed that the composite material has a wider pH range than using chitosan as an adsorbent to adsorb methyl red; The mass ratio of chitosan to bentonite is 0.08:1, the removal rate of methyl red is the best; The amount of adsorbent used is 0.7mg to reach saturation for a volume of 25mL of methyl red solution with a concentration of 20ug/l; the adsorption of methyl red by the material conforms to the pseudo-second-order kinetic model.
Research on Customers’ Purchasing Intention of Sports Shoes Based on Data Mining Application
Authors: Che Wanliu , He Gang , Gui Haixia , Shen Changxia , Yang Fan 
Published: April 2020

Abstract
The rapid development of e-commerce makes online shopping the main means of social consumption. How to extract useful information from massive semi-structured and unstructured customer data has become a hot issue in e-commerce industry research. This article uses the Octopus data crawler software to capture the online purchase information of Jingdong Mall sports shoes customers, and classify and analyze the information, and analyze the price, color, size, brand, etc. of the most popular sports shoes purchased by consumers; On the other hand, GeNie is used to generate online reviews of the Bayesian network structure model for the platform, and the cross-validation method is used to test the accuracy of the model. Finally, the key factors affecting the satisfaction of the sneaker customers are analyzed, and the customer satisfaction is studied. There is a significant causal relationship between the target variable and other related variables, and there are different degrees of correlation between different variables. The most important factor for consumers to purchase sports shoes is the comfort, quality and brand of sports shoes.
Experiment Analysis Research on Electrical Discharge Machining Polycrystalline Diamond Tool
Authors: Jia Yunhai , Guo Jianmei , Zhang Qinjian , Cai Yanhua 
Published: April 2020

Abstract
As the hardest material in the field of synthetic materials, polycrystalline diamond has been paid more and more attention in the field of tools, which embody the basic characteristics of "high efficiency, precision and flexibility" of modern advanced cutting technology and cleaner production. Electrical discharge machining is typically used in processing polycrystalline diamond tools, especially in the machining of special shape, thin and fine cutting tools. In this paper, 2 micrometer and 10 micrometer polycrystalline diamonds are taken as the research object, and the surface quality of the disc electrode and wire electrode is simply compared by means of process and material test. The effects of diamond particle size, electrode polarity and electrode speed on the surface quality and the material removal rate of precision electrical discharge machining polycrystalline diamond are studied. The results show that there is no porous structure and no selectivity in discharge etching when the negative polarity electrode machine is used. With the increase of electrode rotation speed, the removal amount of polycrystalline diamond increases gradually, while the surface roughness of polycrystalline diamond decreases first and then increases. When the electrode linear velocity reaches 80 m/min, the surface roughness of polycrystalline diamond sample reaches the minimum value, and the removal amount of polycrystalline diamond material tends to be stable.
Intelligent Heat Dissipation Device Based on Shape Memory Alloy
Authors: Wang Yanlong , Wang Sanwu , Huang Xi , Li Chengchi 
Published: April 2020

Abstract
With the miniaturization of electronic products, heat dissipation has gradually become a focus issue. Most current heat sinks use sensors to detect temperature. After reaching a certain threshold, the sensor generates a signal to drive the motor to drive the heat sink blades to rotate to achieve heat dissipation. This kind of heat dissipation method is more commonly used, but the sensor’s anti-interference ability is poor, and the heat dissipation device works at a higher temperature for a long time, the service life will gradually decrease, and the sensing and feedback structure is more complicated and prone to damage. In view of the shortcomings of the above existing products, this article uses the material characteristics of shape memory alloy springs to creatively design a green intelligent heat sink that combines memory alloy springs with sprocket drives. The device uses a memory alloy spring to sense the heat source, and makes full use of its mechanical characteristics to drive the blades of the radiator to rotate, ultimately achieving the purpose of heat dissipation. Experiments and simulation analysis on the operation of the device were conducted to further demonstrate its feasibility, and the benefit analysis and application prospects of the device were clarified through the benefit analysis.
Research on Positioning of Carrier-Based Aircraft Based on Particle Filter Optimized by Firefly Algorithm
Authors: Du Yajie , Zhao Jianjun , Wang Yi 
Published: April 2020

Abstract
In order to improve the positioning accuracy of the landing guidance radar, particle filter algorithm is used to estimate the positioning of the carrier aircraft. In order to solve the problem of the degradation of particle weight and the decrease of filter precision caused by the dilution of sampling particles in the conventional particle filter algorithm, an intelligent optimization particle filter algorithm based on firefly algorithm is proposed. By introducing the optimization mechanism of firefly algorithm into the conventional particle filter algorithm, particles can move to the high likelihood region, improve the overall quality of particle swarm, avoid particle degradation, and improve the filtering accuracy. The experimental results show that the algorithm is more effective and practical than the conventional particle filter algorithm.
Study of a Fast Over-Current Protection Based on Bus Voltage Drop for Gallium Nitride Power Device
Authors: Zhou Yang , Bai Zhijun , Gong Xiang 
Published: April 2020

Abstract
Due to the low threshold voltage, gallium nitride (GaN) high electron mobility transistor (HEMT) is prone to mis-conduction. Meanwhile, compared with silicon (Si) insulated gate bipolar transistors (IGBT) and silicon carbide (SiC) metal- oxide- semiconductor field effect transistor(MOSFET) devices, GaN HEMT have a shorter short-circuit withstand time at highvoltages, only a few hundred nanoseconds, which leads to a serious challenge to overcurrent protection. Traditional inductor detection and desaturation overcurrent detection have a long execution time, which are no longer suitable for over-current protection of GaN. Therefore, this paper proposes a new fast over-current protection method, which is based on the bus voltage drop. Through simulation and experimental verification, the result proves that the proposed protection method can detect the over-current signal within 100ns and turn off the GaN device within 400 ns, achieving fast and reliable over-current protection.
Study of a prefabricated structure perforated paving inlaid brick grid mat
Authors: Li Yulong , Yang Fan , Guo Huijie 
Published: April 2020

Abstract
In this paper, a prefabricated structure perforated paving inlaid brick grid mat is proposed, which is laid on the leveling layer and embedded in the brick block. The position of the brick is fixed by the positioning pile to ensure the gap between the bricks. Through the above manner, it is possible to directly use the bricks of common specifications to complete the permeable paving, simplify the paving operation, facilitate replacement and maintenance.
Study on the Influence of Oil Replacement on Furfural Content in Transformer Oil and Insulation Aging Assessment
Authors: Tang Xiaofeng , Su Zhengyuxi , Chen Peng , He Cui 
Published: April 2020

Abstract
The service life of a transformer was determined by the aging state of solid insulation. When the aging state of the transformer insulation reaches a certain level, oil replacement or oil filter was performed to improve the insulation ability of the insulating oil. A series of treatments of insulating oil inevitably result in the loss of furfural in the oil. In order to study the effect of oil replacement on the furfural content in oil, oil-paper insulation samples with different aging degrees were prepared under laboratory conditions. Besides, oil replacement was carried out in different aging stages, and the times of oil replacement was divided into once and multiple. Furthermore, the furfural content in oil was compared before and after oil replacement, and the effect of oil replacement on the furfural content in transformer oil was analyzed. The results showed that oil replacement had little effect on furfural content in the early aging stage, while it has a greater effect on furfural content in the late aging stage. In addition, the cumulatively of multiple oil replacement on the loss of furfural in oil can cause greater deviations in transformer aging evaluation. Therefore, the effect of oil replacement on the evaluation of insulation aging of transformer is not negligible.
The Role of Lightweight Design Method in Flexible Fixture Design
Authors: Jiao Chuanyan 
Published: April 2020

Abstract
To reduce the processing cycle and cost of sheet metal parts, a flexible fixture is designed by light weight method. First, the finite element analysis techniques adopted are summarized. Second, the static and modal analysis of the flexible fixture unit is carried out to obtain the design structure that meets the strength and rigidity requirements. Third, the lightweight design of the base of the positioning clamping unit is carried out after the analysis of the design structure of the positioning clamping unit. The modal analysis results of the positioning clamping unit show that at the operating frequency of 50Hz, the positioning clamping unit designed in this research would not resonate. Lightweight design results obtain the optimal section design parameters, achieve the purpose of reducing the weight of the flexible fixture base structure, and save the cost. Therefore, the results of this study provide a good idea for flexible fixture to adapt to the diversity of mechanical products.
The Influence of Material Hysteretic Property on Seismic Collapse-Resistant Capacity of RC Frame Structure
Authors: Huang Kai , Tan Zhenglei , Zhang Chao 
Published: April 2020

Abstract
To study the influence of hysteretic behavior of material on the seismic collapse-resistant capacity of reinforced concrete frame structure, a 5-story plane frame was selected as the research object, the incremental dynamic analysis method was used to analyze the collapse vulnerability of the structure. According to the collapse probability curve, the seismic collapse-resistant capacity of the RC frame structure with different hysteresis parameters was quantitatively evaluated. The research shows that the concrete strength grade has the most significant influence on the seismic collapse- resistant capacity. Reducing the concrete strength degradation or increasing the strain hardening rate of the steel can slightly improve the seismic collapse-resistant capacity ability; The concrete hysteresis pinch and the steel hysteresis energy consumption has no effect on the seismic collapse-resistant capacity of the structure. The seismic collapse-resistant capacity of the structure is negatively correlated with the strength grade of the steel bar, but its impact is not obvious.
Experimental Study on Dry and Wet Bending Behavior of CF/GF Inter Laminated Hybrid Composites
Authors: Chen Guotao , Mei Zhi Yuan , Fu Xiao 
Published: April 2020

Abstract
Experimental study on the bending characteristics of dry and wet state (100 °C boiled for 2 hours) in the same layering method, carbon (T700 unidirectional cloth)/glass (EWR800 multiaxial cloth) interlaminar hybrid composites with different mixing ratios. At the same time, the effects of 430LV vinyl resin and QC-350 epoxy resin on the bending properties of hybrid composites were compared and analyzed. The test results show that, In the same mixing ratio and the same test condition, QC-350 epoxy resin corresponding to the hybrid sample bending performance is better than 430LV vinyl resin; the wet bending strength and modulus of hybrid bending specimens are lower than those of dry bending specimens in varying degrees. The flexural strength and modulus of hybrid specimens increase with the increase of carbon fiber volume fraction. And as the volume of carbon fiber in the sample increases, the flexural strength and modulus of the hybrid sample increase to varying degrees. In addition, the results also show that the bending strength and modulus of hybrid bending specimens without post-curing treatment decrease in varying degrees at the same mixing ratio, whether in dry or wet state.
Fabrication and Properties of Polyimide/Aluminum Oxide Composite Films via Different Alkali Etching and Ion Exchange Technique
Authors: Zhang Mingyu , Liu Lizhu , Zhang Chunqi 
Published: April 2020

Abstract
The polyimide (PI)/aluminum oxide (Al2O3) composite films were prepared via alkali surface modification and ion exchange technique on flexible PI films. Firstly, the polyamide acid layers were formed on both surfaces of PI film through chemical surface modification in aqueous KOH and NaOH solution, respectively. Subsequently the ion exchange process was processed in AlCl3 aqueous solution. After final thermal annealing in air, the aluminum ions which exchanged on both surfaces of PI film became continuous Al2O3 composite layers. The surface morphology, microstructures, thermal and electrical properties of the PI/Al2O3 composite films were tested by the scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), electric breakdown voltage and corona-resistant measurement. Results from SEM measuring revealed that the surfaces of composite films became much rougher with the increasing alkali treatment time. FT-IR spectrums showed that the treatments of alkali surface modification and ion exchange had no effect on molecular structure of polyimide. TGA results showed that the excellent thermal properties of the film are maintained. Electric breakdown voltage of composite films showed monotonically decreased with the increasing alkali treatment time. Corona-resistant test results showed that the best corona-resistant times of composite films which using NaOH and KOH modification were up to 22.6 minutes and 15.4 minutes, respectively.
Study on the Heat and Pressure and Their Effect on the Surface Shape Precision of Optic in Continuous Polishing
Authors: Wang Yiren , Liao Defeng , Ren Lele , Zhang Feihu 
Published: April 2020

AbstractIn the process of ring polishing, the non-uniform temperature distribution in the element will make the shape of the element change greatly, which leads to the non-uniform pressure distribution between the element and the pad. According to Preston equation, uneven pressure distribution will produce uneven material removal rate and affect the surface morphology of optics. In this paper, the influence of temperature differenace on the deformation of the element is revealed, and then the relationship between the deformation and the contact pressure of the element is deduced. Combined with Preston equation, the temperature difference in the element and the surface accuracy of the element are finally connected, and verified by the surface shape measurement.