bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of the main factors affecting the magnetic properties of silicon steel sheets by comparing three kinds of silicon steel
Authors: Zeng Jianhui , Li Liejun , Gao Jixiang , Huo Xiangdong , Peng Zhengwu 
Published: December 2022

Abstract
As an important magnetic material, silicon steel is widespread used in various motors, generators, relays and transformers. It is of great significance to explore the factors affecting the magnetic properties of non-oriented silicon steel. This paper introduces the production process of 50W800, 50W600 and 35W550 non-oriented silicon steel, and compares their magnetic properties, observes the microstructure of silicon steel sheet under hot rolling, cold rolling and annealing three technological states, analyzes the influence of sheet thickness, composition, microstructure and impurity on the magnetic properties of non-oriented silicon steel. The results can be summarized as follows: (1) The magnetic properties of the silicon steel sheet can be improved to a certain extent by reducing the thickness of the silicon steel sheet.(2) Increasing silicon content in a certain range can reduce core loss of silicon steel. (3) After annealing, the grain size of cold rolled silicon steel sheet becomes larger, the defect of grain decreases, the loss of iron core decreases, and the finished silicon steel sheet with good magnetic properties is obtained.
Molecular dynamics study of tensile properties of graphene/GaN heterostructures
Authors: Liu Dongjing , Zhu Jingjie , Zhou Fu , Zhang Guoqi , Yang Daoguo 
Published: December 2022

Abstract
Graphene/GaN nanocomposites have been widely used in high-power and high-frequency optoelectronic devices. At present, the thermal transport characteristics of graphene/gallium nitride heterostructures have been investigated by many scholars, but their mechanical properties have not been systematically studied. In this paper, the effects of graphene layer number, temperature and interfacial structure on the mechanical properties of graphene/GaN heterostructures were investigated by molecular dynamics method. The mechanical properties of materials were analyzed by failure stress, failure strain and Young’s modulus. The simulation results show that the heterogeneous structure is very sensitive to temperature. When the temperature is set at 2000K, the Young’s modulus of the heterostructure decreases by 25.11% compared with that at 300K, which indicates that the increase of temperature will reduce the mechanical properties of graphene composites, However, when the number of graphene layers increases, the mechanical properties of the heterostructures also improved. With the number of graphene layers is set from 1 layer to 5 layers, the performance of the heterostructure is improved, and its Young’s modulus increases by 48.46%. In addition, the effect of interface structure on the young’s modulus of the heterostructure structure is not obvious, but it will affect the maximum failure stress and maximum failure strain of the material. The mechanical properties of graphene in cross section contact with gallium atom are better than those of nitrogen atom. It is beneficial to improve the reliability of microelectronic devices to control and design heterogeneous structures based on the research results.
Study on the Coordination of Cd Ion with Perhydroxylated Hetero-N and Hetero-S Calixtetraarene Derivatives
Authors: Liu Yu , Wang Xiaofeng , He Liping , Meng Yanbin , Lan Wenbo , Wang Binbin , Yu Yao , Xie Qun 
Published: December 2022

Abstract
To explore the best hybrid calixarene for cadmium ion capture, the B3LYP method in density functional theory (DFT) was used to optimize the structure and infrared vibration data of the complexes formed by each fully hydroxylated heteroN and heteroS calixtetraarenes with Cd ions. The stability of the structure of each complex was verified. At the same time, the structural characteristics of each complex were analyzed. A comparative study on the binding ability of different numbers of hybrid calix [4] arene derivatives to Cd ions was carried out, and the complexes that best bound to Cd ions were obtained. For example, the binding capacity of hetero S-calix [4] arenes to Cd ions is greater than that of non-hybrid complexes and hetero-N complexes to Cd ions. More interestingly, as the number of S atoms in the hetero S increases, the binding ability to Cd becomes stronger.
Hexagonal sheet Ag and Ag nanoparticle inside 3D-TiO2 NTAs decorated Ti gauze by electrodeposition
Authors: Chen Chao , Liu Yang , He Tusheng , Tian Changan 
Published: December 2022

Abstract
Noble metal nanoparticles have attracted extensive attention by many researchers because of their optical, electrical and magnetic advantages. Half hexagon sheet Ag and Ag nanoparticles inside 3D-TiO2 nanotube arrays (NTAs) on Ti gauze was firstly synthesized by electrodeposition. The addition has a great influence on the morphology of Ag. When Ag hexagonal side length reached a maximum of 2 μm for 20 pluses, hexagonal Ag would transform oval Sphere with depositional pulses continuing increases, Ag nanoparticle inside 3D-TiO2 NTAs also were found, and the Ag modified NTAs for 20 pulses with the best photo-catalytic activity degraded methyl orange (MO) under solar light irradiation. Due to 3D-TiO2 NTAs supporting Ag catalyst, which is a benefit for recycling after the catalyst. This work is expected to provide a fundamental guide for the design of novel morphology catalysts on Ti gauze, which is conducive to recycling.
Doped single B atom on WS2 as a promising electrocatalyst
Authors: Xu Beixi , Hao Chunlian , Guo Wenyue 
Published: December 2022

Abstract
Ammonia (NH3) has the characteristics of large hydrogen content and high energy density, which is in line with the concept of green and low-carbon circular economic development. Since nitrogen (N2) sources are abundant on earth, they can be used to synthesize NH3. The critical step is breaking the N≡N bond (945 kJ/mol), and then activating N2. Today, industry requires the production of NH3 at the temperature as high as 300-500°C and the pressure as high as 150-300 atm, using metal catalysts such as iron (Fe) or ruthenium (Ru), which consumes plenty of energy. The electrocatalytic nitrogen reduction reaction is considered to be an alternative expected method for NH3 production under gentle conditions, in which the catalysis of the electrocatalyst plays a crucial role. The results indicate that N2 can be effectively enabled by B/WS2 and can accelerate the process which converts nitrogen gas into ammonia through an alternative mechanism of nitrogen reduction reaction (NRR) in a low limiting potential of -0.44 V. Furthermore, the as-designed catalyst performed highly thermodynamic stable, highly active, and highly NRR select. Thus, this work gives researchers a new perspective on N2 fixation by lower dimensional electrocatalyst materials under gentle conditions.
The lightweight design for the frame structure of FSEC
Authors: Ren Chun , Guo Xiang 
Published: December 2022

Abstract
Vehicle light-weighting is aimed at reducing the curb weight of the vehicle to ensure its strength, safety, and performance, as well as to reduce fuel consumption and exhaust emissions. The use of modern simulation technology in structural optimization design is one of the most important methods to achieve structural lightweight. In this paper, we study the size optimization of the frame structure based on the rules and requirements specified in Formula Student Eclectic China (FSEC), following the race’s rules and requirements, while satisfying the vehicle’s dynamic and static performance requirements. First, a three-dimensional geometric model of the frame structure is developed, and the static and dynamic performance of the frame is simulated using the finite element method. Next, structural size optimization is carried out under the premise of ensuring structural performance. Finally, the feasibility of the optimized structure is evaluated by comparing its performance before and after optimization. The research results show that the final frame structure has been reduced by 7.6 kg and the weight reduction has reached 22.4%. All performance indices meet the requirements of the competition, and a good lightweight effect has been achieved.
Analysis and research on the resonance of mobile phone shielding cabinet
Authors: Wen Shuhua , Fang Chen 
Published: December 2022

Abstract
In order to cut off the connection between the mobile terminal and mobile communication base stations or Wi-Fi, it is necessary to improve the electromagnetic shielding efficiency of the mobile phone shielding cabinet. This paper analyzes the resonant characteristics of mobile phone shielding cabinets. The test method of electromagnetic shielding has been introduced. Through Maxwell wave equation and boundary conditions, the cavity resonant frequency of every small drawer on the mobile phone shielding cabinet has been derived, and the rectangular cavity research model was established. Using the high-frequency finite element method (FEM) simulation to calculate the cut-off frequency of the first 10-order high-order mode in the cavity, the resonant standing wave field distribution of every small drawer on the mobile phone shielding cabinet has been analyzed. This paper can offer a theory instruction for the product design of mobile phone shielding.
Fracture Analysis of Butt Joint Girth Weld of Pipe and Flange
Authors: Xu Yan , Bi Liuhan , Liu Yinglai , Xu Tianhan , Feng Zhenjun , Bai Qiang , Yang Fengping 
Published: December 2022

Abstract
Duplex stainless steel has been widely applied to industry. In this paper, nondestructive testing, chemical composition analysis, metallographic analysis, hardness test, and scanning electron microscope were used to study the causes of the crack in the butt joint girth weld of pipe and flange. Both steel pipe and flange are duplex stainless steel S31803. Through analysis, it was judged that the crack was a crystalline crack, generated in the welding process, which was related to the welding process and the control of the welding installation gap between the steel pipe and the flange with unequal wall thickness.
Research on fatigue crack propagation life prediction method for subsea pipelines
Authors: Zhou Chenyan , Zhang Jianing , Zhang Yahong , Chen Jie 
Published: December 2022

Abstract
Subsea pipelines are subject to complex loading environments, and fatigue damage is one of the main failure modes. Due to manufacturing or environmental factors, crack defects are inevitable in submarine pipelines. For subsea pipelines in service, it is of practical importance to predict the residual fatigue life. On the premise of the conservative estimation method, the MTS criterion is used to analyze the crack propagation mode of subsea pipelines. In the numerical prediction method, the crack stress intensity factor is solved by the finite element method combined with the 1/4 node displacement method, and then the fatigue life of the subsea pipeline is predicted by the da/dN method based on the Paris formula. The results show that when the crack size increment Δa is set reasonably, the predicted results of crack propagation life of subsea pipeline are close to the experiment results, which verifies the accuracy of the numerical prediction method. The choice of the crack size increment has a large impact on the life prediction and needs to be considered in terms of both calculation accuracy and time consumption. The results obtained provide a reference for the safety assessment of pipelines in service.
Prediction of the Exposure Endpoint of Textile Color Fastness to Light
Authors: Zhang Huanhuan , Huang Yijing , Zhou Wei 
Published: December 2022

Abstract
The color fastness to light of textile in the product standard is always tested by method 3 in GB/T 8427, which determines the endpoint of exposure according to the discoloration of the blue wool standard sample. The aging of the xenon lamp for exposure resulted in the different sun exposure times of blue wool references required for the same color fastness level. As a result, the difficulty of testing increased, and the test accuracy was also affected. In this paper, the relationship between the exposure time and the service time of xenon lamps was studied through real-time monitoring to accurately predict the endpoint of textile light fastness. The exposure time for color fastness class 3 curve according to the service time of xenon lamp was fitted as: y1=10.4785+6.39539E−5x1+2.53603E−7x1
2; the exposure time of color fastness class 4 underexposure was fitted as: y2=38.17692-0.00131x2+2.78006E−6x2
2-4.81015E−10x2
3; the color fastness to light of textiles wetted with artificial perspiration was y3=13.78014-5.53089E−4x3+1.53274E−6x3
2-2.92228E−10x3
3+1.02685E−14x3
4. The method is practical and effective, has practical value for the light fastness testing of textiles, and has important guiding significance for daily light fastness testing in the future.
A molecular dynamics study on sintering behavior and densification characterization of nanocopper
Authors: Shi Jingmin , Xiao Wei , Wang Jianwei , Yang Hui 
Published: December 2022

Abstract
The technical problem of copper additive manufacturing is expected to be solved through the size effect of nanomaterials. The molecular dynamics method was employed to understand the laser sintering process of single-crystal copper nanoparticles. Based on a theoretical characterization of the densification of nanocopper sintering developed at present and the prediction of the melting point of nanocopper, the sintering and densification behaviors of copper nanoparticles with different sizes at different sintering temperatures were investigated. It is finally concluded that the densification of the nanocopper sinter can reach up to 95% under the condition of sintering temperature below the melting point of the nanocopper.
DR detection process analysis for weld of pressure-bearing special equipment
Authors: Chen Le 
Published: December 2022

Abstract
Due to the complex and harsh operating environment of pressure-bearing special equipment, the occurrence of accidents is very harmful, so its safety performance is very important. At present, the smelting and machining technology of related raw materials and components is very mature, but the toughness of the weld metal generally lags behind that of the base metal, which has become the weakest link in pressure-bearing special equipment. Especially in long-term operation under complex working conditions such as high temperature, high pressure, and vibration, it is easy to produce fatigue, corrosion defects, or cause the expansion of residual defects in manufacturing and installation. This paper will analyze and introduce the digital ray (DR) detection process of weld of pressure-bearing special equipment, and provide a certain reference for the correct use of digital ray technology.
Failure Analysis of Oil Pipe Fracture in Steam Turbine Oil Supply System of Power Plant
Authors: Chen Le 
Published: December 2022

Abstract
Oil pipe fracture of the steam turbine oil supply system of a thermal power plant is carried out by macro inspection, spectral analysis, metallographic analysis, hardness analysis, and scanning electron microscope analysis. The results show that the fractured tubing is a fatigue fracture, and the source of the crack is the fatigue crack formed by the stress concentration of the weld, which eventually leads to the fracture and leakage at the place.
Research on the agile management system of workshop production resources
Authors: Jia Limin , Mo ShanShan 
Published: December 2022

Abstract
Industry 4.0 has a key technical point that the intelligent factory uses the ‘ raw materials ’ containing information to complete the production tracking. The high-performance real-time positioning system is an important part of the real-time tracking and positioning of materials in the industrial Internet of Things. Passive Ultra High Frequency (UHF) Radio Frequency Identification (RFID) technology has become the preferred solution for the industrial 4.0 material real-time positioning system. This paper first analyzes the RFID positioning technology, gives the process architecture of workshop manufacturing resource RFID real-time information-driven production line and the classification and management scheme of multi-source real-time manufacturing information, and realizes the RFID tracking and positioning of workshop manufacturing resource.
Analysis of coiling stable roll of hot-dip galvanized strip
Authors: Lu Fangtao , Lin Zhijun , Lin Guoli , Murong Wei , Hu Faqi , Li Liejun 
Published: December 2022

Abstract
The coiling stable roll of hot-dip galvanized is a defect formed in the galvanizing process. The zinc slags and floating foreign matters in the zinc pot will directly or indirectly adhere to the roll surface of the stabilizer roll with the flow of zinc liquid. When the strip steel contacts the stabilizer roll, the zinc slag will extrude and deform the iron base plate and form pits. In this paper. The causes of the defects were analyzed. There were two methods to eliminate the coiling stable roll, that is, to reduce the generation and accumulation of zinc slags in the zinc pot. The main measures are first to control the temperature of the strip entering the zinc can plate and the temperature of the molten zinc, and then control the amount of residual bottom residue before the zinc pot goes online. Another is to ensure the cleanliness of the steel strip before it enters the molten zinc. Based on this, the main measures implemented are: improving the cleaning ability of the cleaning section and improving the reducing ability during annealing to inhibit the formation and accumulation of zinc powder in the furnace head area.
Study on interfacial thermal resistance between single wall carbon nanotubes and nickel by molecular dynamics
Authors: Huang Haibo , Huang Xiaohua , Meng Xianguo , Cheng Zaijun 
Published: December 2022

Abstract
The interfacial thermal resistance of the nanocontact system of carbon nanotubes and nickel crystals was investigated using molecular dynamics. It was found that with the increase in temperature, the interface thermal resistance gradually increased. In addition, the interfacial thermal resistance also increases gradually with the increase of the contact distance. The ballistic transport of phonons is proposed to be the main reason for the interfacial thermal resistance in this case.
Band structures of graphene, black phosphorus, and MoS2 ribbons under stress: a comparison study
Authors: Ding Rongcheng 
Published: December 2022

Abstract
The application of electronic devices becomes increasingly extensive and their performance optimization receives broad attention. Electronic devices constructed from two-dimensional materials have revealed broad prospects. However, the performance of two-dimensional electronic materials in the presence of stress has rarely been researched, which will restrict their application in an environment with intense deformation or temperature variation. Here, we adopt a first-principle method to investigate three kinds of ribbons: graphene, black phosphorus, and MoS2. We find that the bandgap of graphene and MoS2 ribbons increase with the rise of stress, while the bandgap of black phosphorus reduces when subject to both positive and negative stress. The abnormal trend of black phosphorus is owing to the indirect bandgap properties under negative stress, which becomes direct bandgap under positive stress. The present research has instructive meaning for the application of two-dimensional material on electronic devices under stressed conditions.
Preparation of nickel-copper layered double hydroxide on nickel foam as a non-noble catalyst for efficient electrooxidation of ammonia
Authors: Wang Haiman , Yuan Yiqing , Wang Guiqiang , Miao Zhuang 
Published: December 2022

Abstract
Electrochemical oxidation of ammonia is an energy-effective and environment-friendly technology for ammonia-containing wastewater treatment. The key challenge is to explore the high activity and low-price catalyst for ammonia electrooxidation. NiCu layered double hydroxide (NiCu-LDH) on nickel foam (NF) was synthesized for ammonia oxidation via a facile hydrothermal reaction. The Ni0.9Cu0.1-LDH/NF achieved a maximum current density of 78 mA·cm−2 at 1.76 V vs. RHE and a lowest Tafel slope of 195.64 MV·dec−1 in comparison with other catalysts, which was prepared by using different molar ratios of Ni2+ and Cu2+. The Ni0.9Cu0.1-LDH/NF showed smaller and denser nanosheets compared with that of Ni(OH)2/NF, indicating it had more electrochemical active areas and active sites. Chronoamperometry tests showed that the Ni0.9Cu0.1-LDH /NF reached a current density of 23 mA·cm−2 after 120 mins, which was four times as high as Ni(OH)2/NF (6 mA·cm−2). The above results demonstrated that incorporating Cu into the Ni-based layered hydroxides could improve the electrochemical activity of the catalyst, showing Ni0.9Cu0.1-LDH /NF to be a prospective inexpensive, and steady catalyst for high-performance of ammonia electrooxidation.
Research on high temperature deformation behavior and constitutive relation of TiAl alloy
Authors: Li Xiaoqiang , Fan Jiafeng , Xu Ganglai , Hou Jinbao , Wang Xuecheng , Zhu Zhencen , Shao Yonglin 
Published: December 2022

Abstract
TiAl alloy is a new type of superalloy with great potential in aero-engine, and its hot deformation behavior has received extensive attention. In this study, the high temperature plastic deformation behavior of TiAl alloy has been studied through compression at 900 ~1100 °C and strain rates of 0.1 s−1, 0.01 s−1, and 0.001s−1. Then, the constitutive model of TiAl alloy has been established based on the true stress-strain curve. The results show that TiAl alloy has a high sensitivity to strain rate and temperature at the experimental condition. Under the compression condition of 900 °C and 0.1 strain rate, the TiAl alloy has a penetrating crack when the strain reaches 0.6. The crack disappears as the temperature is increased and the strain rate is reduced. In addition, the plate organization in TiAl alloy breaks and spheroidizes after compression at 1100 °C,
Simulation and Study on Surface Residual Stress Influence of TC4 Titanium Alloy
Authors: Lv Chang 
Published: December 2022

Abstract
To study the residual stress distribution on the machining surface of TC4 titanium alloy and its influence on the milling stability, a three-dimensional milling model of TC4 titanium alloy workpiece milling with carbide end milling cutter was established based on Abaqus finite element software. Constraints were imposed according to the actual machining conditions. The distribution of residual stress on the machined surface of TC4 titanium alloy with different milling parameters was investigated by using the angular velocity and feed velocity of the tool as input load variables. The simulation results show that along the tool feed direction for reference, its residual stress was generally greater than the left side of the milling groove on the right side of the milling groove residual stress, cutting tool feed direction on the normal direction of the farther distances from the center of the tool axis of the residual stress value, the greater the residual stresses in longitudinal depth was as the smaller the farther distance milling surface stress value.