bluuebunny/crossref_metadata_2025_split huggingface dataset:
Imaging of Structural Abnormalities of the Sacrum: The Old Faithful and Newly Emerging Techniques
Authors: Vereecke Elke , Herregods Nele , Morbée Lieve , Laloo Frederiek , Chen Min , Jans Lennart 
Published: September 2022

AbstractThe sacrum and sacroiliac joints pose a long-standing challenge for adequate imaging because of their complex anatomical form, oblique orientation, and posterior location in the pelvis, making them subject to superimposition. The sacrum and sacroiliac joints are composed of multiple diverse tissues, further complicating their imaging. Varying imaging techniques are suited to evaluate the sacrum, each with its specific clinical indications, benefits, and drawbacks. New techniques continue to be developed and validated, such as dual-energy computed tomography (CT) and new magnetic resonance imaging (MRI) sequences, for example susceptibility-weighted imaging. Ongoing development of artificial intelligence, such as algorithms allowing reconstruction of MRI-based synthetic CT images, promises even more clinical imaging options.
Emergence of a random field at the yielding transition of a mean-field elasto-plastic model
Authors: Rossi Saverio , Tarjus Gilles 
Published: September 2022

Abstract
We study the mean-field limit of an elasto-plastic model introduced to describe the yielding transition of athermally and quasi-statically sheared amorphous solids. We focus on the sample-to-sample fluctuations, which we characterize analytically, and investigate in detail the analogy with the athermally driven random-field Ising model. We stress that the random field at the yielding transition is an emerging disorder and we investigate the various factors that determine its strength.
Community detection based on competitive walking network embedding method
Authors: Xue Kun , Han Xiaoxia , Wu Jinde , Shen Yadi , Xu Xinying , Xie Gang 
Published: September 2022

Abstract
Currently, much of the information of the real world is network-structured, and extracting hidden information from network-structured data helps to understand the corresponding systems, but can also be a challenging problem. In recent years, network embedding has been an effective way to extract network information, which represents nodes in complex networks as low-dimensional space vectors, while preserving the properties of the network. Community attributes are an important property of networks, and in most network embedding algorithms, the community structure is usually ignored or cannot be explicitly preserved. In this paper, we propose a new network embedding framework that explicitly considers community structure feature extraction. The framework, called competitive walking network embedding (CWNE), extracts sample sequences by competitive walking and obtains node representation vectors by skip-gram training. Competitive walking allows the extracted sample sequences to be concentrated within the same community, effectively preserving the community structure features of the network. The results of testing the proposed method on artificial and real-world networks show that our model is more effective in detecting community structure in networks. In addition, visualization experiments show that the results of CWNE show that nodes from the same community are more tightly distributed in low-dimensional space.
Microstructural evolution in S31042 heat-resistant steel after service and the effect on hardness
Authors: Jin Xiao , Xia Xianxi , Zhu Baoyin , Zhao Yanfen , Duan Peng , Liang Jun , Du Jinfeng , Zhou Chao , Zhang Guodong 
Published: September 2022

Abstract
The ultra-supercritical power generation technology with high energy efficiency and low emissions is one of the important ways to solve the current increasingly prominent energy problems in the context of international development requirements for carbon neutrality and the increasingly prominent energy shortage. Because of its excellent resistance to high temperature corrosion and organizational stability, S31042 is commonly employed in the most severe working environment of ultra-supercritical units. Due to its great resistance to high-temperature corrosion and organizational stability, S31042 is commonly employed in the most demanding components of ultra-supercritical units such as high-temperature reheaters and high-temperature superheaters. Various characterisation approaches were employed in this research to reflect the microstructure of S31042 heat-resistant steel in service under various time length conditions, and the hardness of S31042 heat-resistant steel was assessed under the corresponding service conditions. The results showed that the hardness of S31042 increased significantly with increasing service time, from around 160 Hv at the time of non-service to nearly 220 Hv after 75360 hours of service. The continuous distribution of uniformly sized M23C6 phase on the grain boundaries of S31042 developed toward grain coarsening after service, but the precipitation strengthening effect produced by the nanoscale secondary NbCrN phase appearing in the grains was the main reason for the increase of the hardness value of S31042, according to the microstructure of the material.
Analysis of the effect of bending rigidity on Gaussian Curvature for clamped and simply supported thin circular plates
Authors: Huang Pengfei , Song Yanping , Su Guanlong 
Published: September 2022

Abstract
Negative Gaussian curvature in deformed surface subjected to concentrated loads is a key weakening factor on the surface accuracy of umbrella antennas. The negative impacts can be mitigated by increasing the bending rigidity of the reflector surface. Thus, firstly, this paper is concerned with the effect of bending rigidity on Gaussian curvature based on the analysis of bending circular thin plate with large deflection. Exact expressions of Gaussian curvature for deformed circular thin plates are derived using the analytical solution of the von-Karman plate equation and the properties of positive and negative for Gaussian curvature is investigated. After solving the zeroes of Gaussian curvature using the Newton iteration method, Gaussian curvature distribution of the deformed surface is obtained.
Heat Transfer Modelling of Friction Stir Lap Welding of PP Plastics and 6061 Aluminium Alloy
Authors: Guo Hua , Zhou Jian , Sun Haijie , Cao Bowen , Yu Wangyang , Li Hongjun 
Published: September 2022

Abstract
Structures with dissimilar materials can make full use of the advantages of each material. However the welding of the aluminum alloy plate and plastic plate are difficult due to high difference in melting point. The friction stir lap welding method is selected in this paper. The numerical model was built to study the heat transfer behavior inside the plates, as the temperature plays an important role in determine the weld quality. The model was validated through experimentally measured temperature results. The influence of welding process parameters such as welding speed, tool rotating speed and downward feed was analyzed. It was found that under the welding speed of 100r/min and downward feed of 0.3mm/s, sound weld was produced.
Strength Analysis and Research of one Touring Car Frame
Authors: Liu Meng , Liu Jing 
Published: September 2022

Abstract
In order to evaluate the static strength and reliability of touring car frame structure, based on the finite element theory and the simplified model, this paper establishes the finite element model to numerically simulate the static strength reliability of the structure under four common working conditions of bending, torsion, braking and turning. It analyses its maximum stress under the limit load, and finds out the weak area of the structure, The corresponding structural optimization scheme is proposed, which largely replaces the physical prototype verification process in the transmission design, greatly reduces the product R & D cycle, and provides theoretical support for the structural optimization of the whole vehicle.
Preparation of flexible titanium dioxide nanofiber membrane and its degradation of malachite green dye
Authors: Guo Bin , Liu Xiao-Yan , Liu Yi-Tao 
Published: September 2022

Abstract
With the continuous development of science and technology, people begin to pay attention to environmental protection. At present, there are many fields causing environmental pollution, among which printing and dyeing wastewater has become the most difficult to degrade in our daily life due to the complexity and instability of organic substances in its water. The seriousness of printing and dyeing wastewater pollution has a great impact on our living ecological environment. As a typical material in semiconductors, titanium dioxide has the advantages of low price, strong compatibility, non toxicity, self-cleaning and stable physical and chemical properties. These advantages determine that titanium dioxide has absolute advantages and deeper potential in the field of photocatalysis. There are a variety of types and forms of titanium dioxide, including titanium dioxide film, powder, particle, fiber and so on. The flexible titanium dioxide nanofiber membrane prepared by electrospinning has the characteristics of high specific surface, large pore size and high transmittance. Flexible titanium dioxide nanofiber membrane is more available and recyclable and can avoid secondary pollution as well. Therefore, the preparation and selection of reasonable photocatalytic materials is also a key step in the field of photocatalytic technology.
Heat-resistant poly (arylene ether nitriles) separator for high-safety lithium batteries via dual-functional modification
Authors: Lin Guo , Liu Chenchen , Bai Zhongxiang , Liu Shuning , Han Mangui , Huang Yumin , Liu Xiaobo 
Published: September 2022

Abstract
Herein, we report a dual-modified organic-inorganic separator as an alternative to polyolefin commercial separator for lithium metal batteries. This composite separator exhibits high thermal stability properties due to the use of an engineering plastic matrix of poly (arylene ether nitriles) (PEN). The dual hydrophilic modification strategy also allows the separator to have a high ionic conductivity and a low interfacial impedance. With this new separator, lithium-metal batteries have high charge/discharge capacity and high-rate performance. Moreover, Li/Li symmetric cells display long-term stability and phenomenon of suppressing the lithium dendrite in lithium-metal batteries.
Incident-angle dependence of deformation characteristics of aluminum surface under low-energy xenon-ion impact
Authors: Zhang Cheng , Zhou Jiang , Xie Wenkai 
Published: September 2022

Abstract
Ion thruster is a revolution technology with potential applications in space mission but the thruster’s operation lifetime is limited by the sputtering from thruster components. In this work, molecular dynamic simulations are performed to explore the dependence of deformation characteristics of an aluminum surface on incident angle and kinetic energy under low-energy xenon-ion impact. The fraction of non-12-coordinated atoms is used to quantitatively characterize the microstructural evolution and defect density levels. It is found that defect density level has a linear relation with incident energy, and there exists a critical incident angle around 20°, at which the aluminum surface has the maximum defect density level. In addition, a collision model is developed to theoretically reveal the physical mechanisms behind the dependence. Our findings may helpful in developing long endurance electric propulsion devices for practical applications.
Dielectric properties of polyarylene ether nitrile composites based on modified boron nitride
Authors: Liu Shuning , Liu Chenchen , Feng Xiaofang , Lin Guo , Bai Zhongxiang , Liu Xiaobo 
Published: September 2022

Abstract
Polyarylene ether nitrile (PEN) is a new type of super engineering polymer with excellent high-temperature resistance, radiation resistance, good electrical insulation, and mechanical properties. In this work, boron nitride (BN) and copper phthalocyanine (CuPc) hybrids were integrated as fillers, which were further dispersed into PEN matrix by solution casting method to obtain a series of PEN composite films. The successful preparation of hybrid fillers was proved by means of X-ray photoelectron spectroscopy and scanning electron microscopy. The test results of the dielectric properties of the composite films show that the CuPc-BN/PEN films exhibit good dielectric properties. When the mass fraction of filler reaches 10 wt%, the dielectric constant of the PEN composite film increases by 17%. This study shows that the composites composed of modified BN and PEN has excellent dielectric properties and has great application potential in heat-resistance thin-film capacitors.
Analysis of Chemical Reaction C6H12N6 + KCLO4 + Mg + SrSO4 in Solid-phase Oscillating Combustion
Authors: Wang Xiaoxia , Gao Xing 
Published: September 2022

Abstract
In this paper, aiming at the chemical reaction system of solid-phase oscillating combustion, the basic dynamic behavior of laser system in terms of bifurcation diagram, Lyapunov exponent and complexity C0 is analyzed by using Matlab software, and the chaotic characteristics and sensitivity to parameters of the chemical reaction system of solid-phase oscillating combustion are expounded.
Thermal Stress Analysis for Carbon/Carbon Material Throat Lining Based on Finite Element Analysis
Authors: Xiong Xuefeng , Li Li , Li Hong , Zan Peng 
Published: September 2022

Abstract
As a key part of the solid rocket motor, the nozzle always withstands a series of problems such as high-temperature, high-pressure, and chemical erosion and faces more severer environmental challenges. So its Stability plays a vital role in the normal operation of the engine. This paper takes the engine nozzle throat lining as the research object, uses the ANSYS to establish a carbon/carbon composite throat lining model in the ACP module, and analyzes the stress and displacement of the throat lining in a high-temperature and high-pressure environment. The experimental results show that under the high-temperature condition of 3500°C, the maximum stress value is 2734.8MPa, and more than 96% of the area is below 1000MPa, lower than the prescribed stress threshold. The superiority in the performance of the throat lining prepared for carbon/carbon materials is verified, and the structural integrity of the throat lining can still be guaranteed under high-temperature conditions.
Research on deformation coordination of composite metal gears in the process of cold extrusion
Authors: Wang Tao , Zhang Yishuai , Sun Hongxing , Wang ZhengBing , Liu Hua 
Published: September 2022

Abstract
In order to realize lightweight manufacturing of gear parts, the cold extrusion forming process of steel-aluminum composite metal gears was studied. Using numerical simulation software Deform, the effects of five steel rings with different thicknesses on forming pressure and shapes of formed forgings were compared. The simulation results showed that final forming force of the gear was smaller and the radial deformation degree of steel ring was larger when using thinner steel ring. This radial deformation degree was characterized by height difference between the convex and the concave in steel-aluminum bonding position, and great deformation presented as obvious bimetal occlusion. The physical experiment verified numerical simulation results, and meanwhile found that the thickness of steel sleeve had an important effect on bonding tightness of steel-aluminum contact surface of formed part and the composite gear formed by thin steel ring had a gap at tooth tip between steel and aluminum. Comprehensive analysis suggested the ratio of outer diameter to inner diameter (R0/Ri) of steel sleeve reflected different deformation regularity. Consequently, the thick-walled axial compression model was used to analyze forming process of steel sleeve with high R0/Ri ratio, and the thin-walled cylindrical shell model was used to analyze forming process of steel sleeve with low R0/Ri ratio. The axial compression of thin cylindrical shell produced local buckling deformation, which led to the appearance of gaps in steel-aluminum bonding position. In order to avoid gaps in bimetal contact surface, the influence of steel ring thickness on deformation coordination of two metals should be fully considered in cold extrusion of steel-aluminum composite metal gear.
Analysis of Stiffness Performance of one Insulated Carriage
Authors: Jing Liu , Meng Liu 
Published: September 2022

Abstract
Based on the finite element theory, the stiffness of an insulated carriage is analysed in this paper. Different from the traditional car, the thermal insulation car puts forward higher requirements for the bending stiffness and torsional stiffness under static and full load conditions. Through the finite element stiffness analysis, the stiffness of the whole frame can be preliminarily determined. The results show that under the bending condition, the tail deformation of the carriage is large and the tail stiffness is insufficient. In the follow-up, it is necessary to improve the tail bending stiffness of the carriage through structural optimization.
Exfoliation of hexagonal boron nitride nanosheets assisted with covalent organic frameworks by ball-milling
Authors: Yan Yunrui 
Published: September 2022

Abstract
Boron nitride nanosheets have superior chemical and physical properties. However, there are many problems in the preparation of hexagonal boron nitride nanosheets, and an effective exfoliation method is still lacking. To solve this problem, this paper intends to obtain boron nitride nanosheets by ball milling using TpPa from COFs material as a ball milling aid, and to investigate various factors affecting the ball milling effect. The h-BN obtained by using some other polymer materials such as starch and pvp as ball milling aids were compared with the h-BN peeled by using COFs materials as ball milling aids, and the results showed that the peeling effect of using TpPa as ball milling aids was not satisfactory because the structure of COFs materials was too stable. This paper also further conducted ball milling experiments on a variety of dry auxiliaries and compared them according to the ball milling effect The strength, friction, softening point and hardness were analyzed by machine learning. The analysis revealed that these aspects affect the cross-sectional area, thickness and aspect ratio of h-BN nanosheets. To obtain good h-BN nanosheets, the main conclusions of this paper are as follows: For the cross-sectional area of h-BNNS: the bond strength, friction, hardness and softening point of the ball milling agents have a strong influence on it and are positively correlated with it, while the friction and softening point of the ball milling agents are negatively correlated with it. For the thickness of h-BNNS: the bond strength and decomposition point of ball abrasives have influence on it, but not much, while hardness, softening point and contact angle have more influence on it, and hardness and contact angle are positively correlated with it, and softening point is negatively correlated with it. For the aspect ratio of h-BNNS: the hardness, softening point and contact angle of the ball abrasive have a greater effect on it, while the softening point has the greatest effect on it with a positive trend and the hardness and contact angle with a negative trend.
Study on dynamic characteristics of flexible feed system by mechanical parameters
Authors: Luo Fei , Chen Hongsheng , Wei Nan 
Published: September 2022

Abstract
The dynamic characteristics of CNC feed system are determined by the dynamic characteristics of mechanical drive and control parameters. The dynamic characteristics of transmission link are closely related to the mechanical characteristic parameters. The designer must find the matching control parameters by analyzing the law of mechanical characteristic parameters and dynamic characteristics. In this paper, the relationship between inertia ratio, resonant frequency and velocity loop control gain is analyzed by using the established three-inertia system model, and the parameters are input into the system model for simulation. It provides a method for the designers of CNC machine tools to adjust the internal control parameters, which has important theoretical and practical value.
Research on Reliability Analysis of Axial-Symmetric Vectoring Exhaust Nozzle Based on Parametric Modeling
Authors: Du Quhu , Li Jia , Xie Liyang , Fu Xingming , Wang Yi 
Published: September 2022

Abstract
According to the motion characteristics of Axial-Symmetric Vectoring Exhaust Nozzle (AVEN), its motion process is divided into the convergence deflection of the adjusting piece of the A8 sub-mechanism and the expansion deflection of the adjusting piece of the A9 sub-mechanism. Taking the A9 sub-mechanism as an example, proposing a method based on Solidworks-Abaqus-Adams multi-software platform to establish a rigid-flexible coupled parametric model and run the motion simulation model to analyze the influence of different factors on the motion accuracy of the mechanism. Basing on the Monte Carlo sampling algorithm to design a program of automatic sampling solution that is separated from Adams platform. Under the condition of meeting certain accuracy requirements, the degree of automation in the sampling process is greatly improved. Finally, the probability distribution of the performance parameters of the A9 mechanism is obtained, and its reliability is calculated. The research results show that when considering various influencing factors, the motion accuracy of the mechanism will have corresponding deviations, which will have a certain impact on the reliability of the mechanism.
Random Vibration Analysis of L-type Electric Luggage Conveyor Vehicle Frame
Authors: Gao Jianshu , Meng Xiangsen 
Published: September 2022

Abstract
In order to verify the rationality of the designed L-type electric luggage conveyor vehicle frame structure, this paper imports the frame structure of the designed L-type conveyor vehicle into ANSYS Workbench software, conducts modal analysis, and evaluates the performance of the frame by analyzing the inherent frequency and vibration pattern, then uses Matlab to build the simulation model of the airfield pavement, calculates the power spectrum density, and the dynamic response and stress solution of the conveyor vehicle under specific operating conditions, and conducts random vibration The dynamic response and stress solution of the frame under the specific operating conditions are obtained. The results show that the frame of the L-type electric luggage conveyor is less excited by the road surface during the driving process, which will not cause large damage to the structure and is reasonably designed in terms of vibration characteristics.
Development of a silicon based polarimeter for the low energy prototype proton EDM ring
Authors: Gooding J. , Bowcock T. , Casse G. , Price J. , Rompotis N. , Vilella E. , Vossebeld J. 
Published: September 2022

Abstract
This article details the design of a silicon based polarimeter for use in a prototype storage ring for proton EDM (Electric Dipole Moment) studies. The polarimeter consists of layers of LGAD (Low Gain Avalanche Diode) sensors for a low material budget, time-of-flight measurement and complemented with HV-CMOS (High Voltage CMOS) sensors for accurate scattering angle measurement and tracking. This design has the objective to optimize the polarization measurement of protons with energy 30–45 MeV. Simulations show that the excellent time resolution of LGAD sensors provides a sufficient energy resolution to meet the experiment specifications. HV-CMOS sensors are included to provide complementary spatial resolution with minimal additional material budget. The simulations show that the detector configuration is capable of measuring the scattering angle of a proton scattered off a carbon target to just a few hundredths of a degree. The time-of-flight measurement performance is demonstrated with lab experiments using electrons from a Sr90 source.