bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the Electrochemical Technology and Nanotechnology of Composite Electrode Used as An Alternative to Ultraviolet Light
Authors: Song Chunyan , Wang Xiaohui , Xie Xueying , Zhao Jingang , Zhang Nan , Gu Zhenqi 
Published: December 2021

Abstract
Advanced oxidation technology has the advantage of being able to efficiently degrade refractory organics, and plays an important role in the treatment of industrial organic wastewater. The article analyses its role in the purification of organic wastewater by the electrochemical method of polymer composite nano-titanium dioxide. The oxygen evolution potential of the nano titanium dioxide electrode is up to 2.8V, showing excellent electrochemical performance. Didache, Si/BDD, Nb/BDD, It/BDD electrodes and surface-modified BDD electrodes can generate strong oxidizing hydroxyl radicals on the surface of the electrodes, which are organic to phenols, dyes, pesticides, and surfactants. The degradability of wastewater is strong. Nano-titanium dioxide electrodes can degrade a variety of organic matter, with a current efficiency of >90%, and can completely mineralize organic matter. Nano-titanium dioxide electrodes have good application prospects in organic wastewater treatment.
Research on Key Technologies for Improving the Electro catalytic Performance and Physical Properties of Lithium Batteries in Electric Vehicles
Authors: Fang Qingyuan 
Published: December 2021

Abstract
Aiming at the uneven heat generation in various parts of the electric vehicle lithium battery pack during the discharge process, the heat generation mechanism is studied, and the lithium battery catalytic performance model is established to obtain the current density and heat generation rate distribution law of the lithium battery cell on the cell. The thermal model can simulate the thermal behavior of the battery under application conditions. Study the laws of battery heat production, heat transfer, and heat dissipation, and calculate the temperature changes inside and on the battery and the temperature field information in real time to provide a basis for the design and optimization of the battery and battery pack thermal management system. The simulation results show that the established model can predict the heating distribution and temperature field of the internal layered structure of the lithium-ion battery, which is helpful for the subsequent analysis of key influencing factors.
Study on the Physical Properties of Split-type Iron Base Shape Memory Alloy Pipe Joint
Authors: Tian Yun , Yao Qi , Jiang Dong , Xiao Yanni , Liu Licheng , Lin Chengxin 
Published: December 2021

Abstract
Aiming at the leakage phenomenon of pipeline system due to corrosion and other reasons, a split type iron-based shape memory alloy pipe joint based on the button bond connection was designed for repair. This split-type pipe joint can be used for quick in-situ maintenance of pipelines without cutting off pipelines or stopping transmission without pressure relief. It is especially suitable for intensive pipeline maintenance and online emergency maintenance. In order to study the connection performance of the split iron-based shape memory alloy pipe joint, this paper took the Fe17Mn4Si10Cr4Ni alloy pipe joint as the research object, and carried out pressure sealing and pull-out experiments respectively on the integral pipe joint and the split pipe joint which had not been carried out and had been subjected to one heat and mechanical training. The results showed that, compared with the integral pipe joint, the pressure seal value of the split pipe joint decreased by 40% to 20MPa and the pulling force decreased by 48.9% without heat-mechanical training. However, after 1 time of thermal-mechanical training, the pressure sealing value of the split-type pipe joint decreased by 12.5% to 32MPa and the pulling force decreased by 21.2% compared with the integral pipe joint. It can be seen that thermal-mechanical training can significantly improve the joint performance of split pipe joints, and the split pipe joint can meet the requirements of medium and low pressure pipeline connection and maintenance.
Physical Application of Mechanical Parts and Components Simulate in Receivable Auxiliary Multifunction Mechanical Hand and Claw
Authors: Yang Yuzhuo 
Published: December 2021

Abstract
Based on the analysis of current office work status and office robots, this paper proposes a design scheme of intelligent mechanical gripper which can transfer data and move objects independently to assist daily office work. It is proposed to design mechanical structure, including mechanism motion design and part structure design, and to use Autodesk Inventor to design and simulate mechanical parts and components. Dimensional and strength checks are carried out on key components, and stress analysis is simulated by using stress analysis module included in Autodesk Inventor. Finally, the mechanical structure design scheme and control system design scheme for the mechanical gripper are proposed. The overall design mainly centers on the functions expected to be completed, and innovates different organizations in combination to achieve the intended objective.
Design and Physical Detection of Bridge Tower and Externally Prestressing Cable for Existing Bridge Strengthened by A Cable-Stayed System
Authors: Wang Xianggang , Yang Yongcheng , Shen Yongli , Xin Xing , Jia Jian , Wang Yegang 
Published: December 2021

Abstract
With the continuous development of economy, the increasing traffic volume has brought greater burden to highway bridges. In this paper, a Yellow River Bridge is taken as an example. The cracking and deflection of the box girder of the main bridge have affected the structural performance requirements of the bridge operation. Based on this situation, the cable-stayed system is used to reinforce the bridge, and the construction process of bridge tower, cable saddle, steel anchor box and external beam is described in detail. The theoretical calculation and practice show that this method can effectively strengthen the bridge structure, and the cable-stayed system reinforcement method, as a mature, reasonable and operable construction technology, provides relevant reference for the reinforcement research of similar bridges.
The Mechanical Properties and Microstructure of Reticulated Red Clay-Sand Mixture Using X-Ray Diffraction
Authors: Zhang Yuxin , Li Jianzhong , Zhang Chuang 
Published: December 2021

Abstract
To assess the behavior of Reticulated Red Clay (RRC)-sand mixtures, a series of laboratory tests were performed on RRC-sand mixtures in which the weight ratio of sand ranging from 0% to 80%. Compaction test and direct shear test were conducted to evaluate the compactness of mixtures. The threshold sand content for the change of the mechanical properties of the mixture is 50%, and the mixture at this time has the densest structure. Oedometer test to the mixture indicate that the coefficient and compression modulus of it are only related to the ratio of its components. As the sand content in the mixture increases, the phenomena that the clay particles enclosing the sand particles and filling into the gaps of particles make the mixture denser. During the same time, there is a phenomenon of internal friction between sand particles caused by the inadequate wrapping of clay particles. Combined with the results of scanning electron microscopy and optical microscopy, the appearance of these phenomena and the transition process of the structure of the mixture from the clay structure to the sand structure were confirmed.
Physical Properties of Cyclic Esters and its Application in Heterogeneous Electrocatalysis
Authors: Duan Haonan , Niu Zanyao , Yang Xiaoqi 
Published: December 2021

Abstract
Oxygen reduction is a key reaction in many energy conversion devices. Phosphorus-containing porous organic polymers not only have developed pores and surface structure, but also have strong adjustable modification and modification, so they have a wide application prospect in heterogeneous catalysis. At present, the preparation of phosphorus-containing porous organic polymers and their applications in heterogeneous catalysis have not been reviewed. in this paper, the research progress in this field in the past decade is summarized and reviewed. The synthetic methods of phosphorus-containing porous organic polymers are developing rapidly, including coupling Polycondensation, lithium salt-mediated Polycondensation, Friedel-Crafts Polycondensation, solvothermal olefin polymerization, Scholl Polycondensation, phenolic polymerization, aldehyde-amine condensation, phosphorization of polypyran salts and multistage polymerization. At the same time of briefly describing the mechanism of oxygen reduction reaction, combined with the research results of my own team, this paper focuses on the application of new porous materials (metal-organic framework MOF, conjugated microporous polymer CMP, etc.) in electrocatalysis. In view of the problems existing in the current electrocatalysts, the future research ideas are pointed out, including the use of advanced technical means to characterize the active sites of the catalysts in situ, based on the fact that there are a large number of phosphine ligands in the framework, phosphorus-containing porous organic polymers can be loaded with a series of metal compounds to make supported metal nanoparticles catalysts, or even monoatomic or unit point metal catalysts. The optimal structure of the catalyst was inversely calculated from the high active sites, and the preparation conditions of the materials were optimized. Under the guidance of theory and practice, a new type of electrocatalyst with high efficiency, stability, economy and environmental protection was developed on the premise of in-depth understanding of the mechanism of oxygen reduction reaction. Then an example is given to introduce the use of POPs to solve the basic scientific problems related to biomimetic catalysis, and show its great application potential. Finally, the challenges and opportunities in this emerging field are summarized and put forward.
Microstructure and Physical Properties of Alloy Brazed with Filler by Mapping Scanning Analysis and Wettability Test
Authors: Li Xiupeng , Li Yunyue , Zhong Sujuan , Shen Yuanxun , Long Weimin , Pei Yinyin , Wang Luyi 
Published: December 2021

Abstract
In this paper, a new type of AlSiMgCuNiAg filler metal was developed. The solidus temperature of the filler metal is 509.1°C and the liquidus temperature is 531.3°C. The filler metal has a good wetting and spreading effect on the surface of 6061 aluminum alloy. The CuAl2 phase in the brazing seam was greatly aggregated after brazed, while the CuAl2 phase was reduced and Mg2Si strengthening phase was formed when the brazed joints with heat treatment. The average shear strength of the brazed joint without heat treatment was 47.1MPa, and the average shear strength of the brazed joint with heat treatment reached to 108.7Mpa. The strength of the brazed joint with heat treatment was increased by about 131% relative to the strength of the brazed joint without heat treatment.
A study on mechanical properties of ferritic alloy by physical testing for nuclear power fusion reactors
Authors: Jia Wenqing , Liu Xiangbing , Fan Minyu , Xu Chaoliang , Li Yuanfei , Qian Wangjie , Quan Qiwei , Yin Jian 
Published: December 2021

Abstract
The ferrite plays an important role in key component materials for nuclear power plant. The study was performed on ferritic alloys with various Cr content ranging from 10 to 38wt%. The Vickers-hardness and mechanical test results indicate that the high Cr content will cause a hardening and strengthening effect on the ferrite steel. Meanwhile, it can be concluded that the ferritic alloy suffers a reduction of toughness and a failure mode transition from ductile to brittle fracture with the increasing Cr content from the SEM fractography analysis.
Failure analysis for opening characteristic of high voltage and high-power silicon carbide module
Authors: Wu Peifei , Du Zechen , Yang Fei , Zhu Tao , Wu Hao , Du Yujie , Tian Lixin , An Yunlai , Sang Ling , Wu Junmin 
Published: December 2021

Abstract
According to the abnormal curve of opening characteristics in the process of double pulse test, the failure of 6.5kV/100A SiC module is judged, and it is preliminarily concluded that the gate of the module is damaged; The failure of the module is located by means of module anatomy, static characteristics test and chip screening test. It is concluded that the failure of the module is caused by the abnormality of two SiC MOSFET chips in the module; The damage of the chip was located by using stereomicroscope, OBIRCH, SEM and other equipment, and the root cause of MOSFET failure was studied by stripping anatomy. The preparation process of the gate and passivation strip on the MOSFET was poor, and the introduction of defects led to the breakdown of the gate unable to withstand high voltage.
A Channel Self-Alignment process for High-Voltage VDMOSFETs in 4H-SiC
Authors: Ge Huan , Zhu Tao , Chang Shucheng , Zhao Wanli , Bai Xue 
Published: December 2021

Abstract
In this paper, we describe a channel self-alignment process to produce High-Voltage VDMOSFETs in 4H-SiC. We use polysilicon as a mask for two injection methods, Because the oxidation rate of polysilicon is different from that of silicon carbide, we can generate a certain thickness of silicon oxide flank wall by controlling the oxidation rate and time. Therefore, there will be a certain distance between the N+ source region and the Pbase region, and this distance is the length of the channel. Obviously, no pattern transfer occurs between the two ion implantation processes, so the channel is self-aligned. As long as the thickness of the side wall is controlled accurately, the channel length of sub-micron can be obtained.
Study on Design of Novel Function/Structure Integration Mounting Plate for Space borne SAR Antenna for Wireless Communication
Authors: Jiang Shouli , Li Jia , Leng Tongtong , Xiao Rui , Yang Zihao , Zhong Jianfeng , Wang Richu 
Published: December 2021

Abstract
A novel lightweight and high-precision synthetic aperture radar (SAR) antenna mounting plate scheme based on functional structure integration technology is proposed. The thermal control function, high and low frequency blind insertion signal transmission function of the system are combined with the antenna structure to greatly reduce the size and weight of SAR antenna. The design verification of a high-density integrated SAR antenna mounting plate breaks through the key process technologies such as accurate splicing of multiple interfaces of the mounting plate, highly reliable cementation of non-uniform honeycomb and large-scale warpage control, and solves the key technical difficulties of high precision, high temperature and high reliability. The results show that the antenna mounting plate (size 649mm × 430mm) the overall flatness is better than 0.28mm, the thickness limit dimension deviation is less than 0.1mm, and the temperature consistency is less than 1.8°C. It can meet the requirements of lightweight, structural stiffness and strength, RF blind plug connection and heat dissipation for space borne SAR antenna.
Research on Structure Integration and Thermal Control Technology of RF Microsystem
Authors: Zhong Jianfeng , Yang Zihao , Tan Liangchen , Jiang Shouli 
Published: December 2021

Abstract
The urgent demand for small volume and light weight of APAR brings new challenges to the integration of radio frequency (referred to as RF) structure. This paper reveals the importance and characteristics of RF microsystem structure integration. Then the new challenges and key technologies in the process of microsystem integration are studied, such as system level thermal management and application of high thermal conductivity, multiphysics simulation and so on. In the end the further thinking of the integration and thermal management technology is illustrated.
Investigation on the effects of vertical baffles on liquid sloshing based on a particle method
Authors: Chen Minghui , Wu Qiaorui , Zhang Zhen , Yu Huimin , Huang Ruichang 
Published: December 2021

Abstract
This study adopts the numerical simulations of Moving Particle Semi-Implicit Methods (MPS), which are meshless methods based on Lagrange particles. Using Lagrange particle has an advantage that it can avoid numerical dissipation problems without directly discretizing the convection term in the governing equation. First of all, a numerical model of a liquid sloshing tank without baffles is used to confirm the effectiveness of the MPS by comparing the numerical results with the experimental data of Kang and Li. And the pressure curves obtained with MPS method were in good agreement with the experimental findings, which confirmed its effectiveness. On that basis, simulations of liquid sloshing movements with one baffle, two symmetrical baffles, and three baffles are performed, respectively. The results indicate that the addition of vertical baffles in the tanks effectively enhanced the ability to reduce liquid sloshing.
Research on Control Method of Microgrid Based on Multi Distributed Generation
Authors: Yue Chengyi , Bei Binbin 
Published: December 2021

Abstract
Reducing the dependence of microgrid upon the communication system and realizing the efficient control of multiple distributed generation of the microgrid are problems that need to be solved urgently. Through the research, based on multiple microgrid operation modes, the peer-to-peer control strategy in microgrid is investigated, and the peer-to-peer control strategy method of microgrid is given for a variety of complex control problems of distributed power According to the peer-to-peer control strategy method, distributed power supply adopts droop control in adjusting distributed power supply in output voltage and frequency; the droop controller has P-f and Q-U droop characteristics. This paper establishes a peer-to-peer control microgrid simulation model, adopts the droop controller designed in this paper to island mode and grid-connected mode, and investigates how the microgrid switches between the two modes. In accordance with Matlab/Simulink simulation outcomes, the research examines frequency, voltage and power changes in distributed generation in the microgrid, and verifies the validity and feasibility of microgrid peer-to-peer control strategy.
Research on Anti-Corrosion and Coating Technology of Outer Pipes of Submarine Pipelines Shallow Sea by Physical Testing
Authors: Jiang Xiaobo , Yin Qingguo , Zhang Xiaochun , Wang Xiaoyan , Yang Shaomin 
Published: December 2021

Abstract
In this paper, by discussing the characteristics of the beach and shallow sea marine environment, combining with engineering design and application, studying the anti-corrosion coating and coating technology of the outer pipe of the pipeline, and analyzing the design of the concrete counterweight layer of the submarine pipeline. According to the submarine pipeline of the environment, structural characteristics, construction methods, etc, the reasons for the damage of the external protective coating under certain conditions are explained, so as to select the external protective coating more reasonably, and provide data for the anti-corrosion and coating selection of the marine pipeline.
A Study on the Physical Structure and Residual Stress of Forgings by Vacuum Induction and Atmosphere Protection
Authors: Dong Zhaowei , Xu Kuikui , Wan Xiaohang , Sun Lihui , Liu Meng , Dong Zhongqi 
Published: December 2021

Abstract
GH4169 alloy was prepared by vacuum induction, atmosphere protection and vacuum self-consumption triple-smelting-technology. After forging and standard heat treatment, the microstructure defects of GH4169 alloy bar were analyzed by scanning electron microscope and x ray diffraction. The change law of tissue defects was simulated by statistical analysis. Residual stress of GH4169 bar is measured by drilling method, and strain release coefficient is calibrated by finite element analysis. The experimental results show that the GH4169 alloy forgings have fine grain size, including δ phase, γ’ phase, γ’” phase and mc carbide phase. The distribution of small defects near the center is dense, the distribution of large defects near the edge is sparse, but the distribution of large defects near the outermost layer is also very dense. The residual stress increases first and then decreases along the radial direction, and the residual stress shows the trend of “external pressure internal pull” on the disk surface, and the compressive stress increases greatly near the edge of the disc. The residual stress is consistent with the density of tissue defects.
A Study on Different Bandwidths and Rim Decorations’ Influence on the Mechanical Properties of Graphene Nanoribbon
Authors: Ziliang Guo 
Published: December 2021

Abstract
This paper structured the Graphene Nanoribbon with different bandwidths and rim decorations and obtained the ideal strength and modulus of elasticity based on the calculation under the First Principle. It can be known that the mechanical properties of Graphene Nanoribbon are close to that of graphene, which have less changes with different bandwidth. However, the mechanical properties would be influenced by different decorations which may change the electronic connection state of edge carbon atoms. The results found in this paper can provide some reference for researchers to study the mechanical properties of graphene nanoribbons in the future.
Study on method of HEPA filter recycling by CFD & Physical treatment
Authors: Cheng Lei , Zhang Zhenwei , Xie Shan , Zhang Jing 
Published: December 2021

AbstractTo find out the best method to recycle the filter, this article used both CFD simulation and Physical treatment to clean the filter. This article shows how the air travel thought the filter and how the pollution particles attracted on the filter and what would be the possible way to remove the particles, by using CFD simulation, the result will be show in the following graphic. found out the most efficiency physical treatment is Ultrasonic, by measuring the transmittance of the liquid after the ultrasonic treatment.
Study on Tunnelling Radiation in 4 Dimension Black Holes Vector Particles
Authors: Chen Bingbing 
Published: December 2021

Abstract
Recent studies show that the tunnelling radiation of vector particles has been studied successfully by WKB approximation and Hamilton-Jacobi method. In view of this, the main purpose of this paper is to study the Proca equation and the vector particles tunnelling radiation in a 4-dimensional black hole. Finally, the results here show that the temperature of the vector particle is the same as that of the Dirac particle.
Computer intelligent dynamic simulation and optimization for structural platform of water treatment subsystem on the spacecraft
Authors: Wang Xiaoxin , Sun Tianfeng , Jiao Feifei 
Published: December 2021

Abstract
In order to reduce the load response condition of space-borne equipment, an optimized design scheme of carbon fiber composites sandwich panel was proposed in this paper. The state before and after optimization was analyzed and compared trough simulation calculation. The comparison shows that after the honeycomb sandwich structure was optimized, its fundamental frequency increased by 75%, the drawing force of embedded parts decreased by 50%, and the maximum acceleration response also decreased. Finally, the response under sinusoidal vibration was evaluated by test, and the results show that the optimization of the structure is reasonable and feasible, it can be the reference of other similar products.