bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on maintenance-free design and low friction characteristics of industrial robot sliding components
Authors: Zhu Zhuomiao , Guo Junde 
Published: March 2024

Abstract
With the continuous progress of industrial automation, the application of industrial robots in various fields has become increasingly common, and ensuring their efficient and stable operation and reducing maintenance costs is crucial. This study used powder metallurgy technology, combined with multiple sintering-rolling processes and oil-immersed vacuum assistance, to successfully prepare Fe-Cu-Ni-Sn-graphite oil-immersed self-lubricating composite materials to meet this demand. In-depth microstructure and wear surface studies revealed that this porous oil-immersed self-lubricating composite material exhibits long-term low friction and high wear resistance and reduces the friction coefficient by 40% compared to untreated samples after a specific composite process. In addition, the material exhibits excellent friction performance in the high-temperature pin-on-disc friction and wear test machine. Even after continuous sliding for 24 hours, its friction coefficient remains low and stable. The study also found that its lubrication mechanism may be attributed to solid-liquid synergistic lubrication, thanks to the appearance of oil-graphite mixtures around the wear track. This design ensures high rigidity and reduced frictional loss, providing a strong reference for the design and optimization of sliding components of industrial robots, and is highly suitable for the widespread application of industrial robots.
Experimental and numerical study on flexural properties of glass fiber reinforced plastic sandwich plates
Authors: Wang Huijie , Zhang Bei , Qi Zehao , Wang Hong , Chai Yongsheng 
Published: March 2024

Abstract
Due to their high specific strength and stiffness, glass fiber reinforced plastic (GFRP) sandwich plates are widely used in various fields such as construction, aerospace, shipbuilding, and military. This paper studies the bending performance of FRP sandwich plates with reinforcement through experimental and numerical simulation methods. The study shows that the bending performance of unidirectional and bidirectional reinforced plates under the same concentrated load is similar, and bidirectional reinforcement cannot significantly reduce the bending deformation of the sandwich plate. Under uniform load, the four-sided supported bidirectional reinforced sandwich plate can significantly reduce the deformation of the plate, and the deformation can be reduced by 40% compared to the unidirectional reinforced plate.
Effect of cooling temperature on microstructure and mechanical properties of Ti microalloyed steel
Authors: Zheng Xin , Zuo Yujian , Tian Hongxin , Wang Yingshuo 
Published: March 2024

Abstract
Ti is a relatively inexpensive alloying element. Ti micro-alloying enables steel to have higher strength, which has already been applied to steel products in many domains, including engineering machinery. In this work, the effects of cooling temperature upon the mechanical properties and microstructure of Ti microalloyed steel were researched by OM, TEM, tensile and impact tests. The consequences show that as the final cooling temperature (FCT) decreased, the steel plate microstructure changed from PF + P + B (less) to GB + PF (less)+ P (less), and the grain size decreased obviously. As the temperature further decreased to 607°C, the intragranular dislocation tangles and subgrains increased significantly. The size and number of large TiC precipitates in the steel plate decreased with the decrease of the final cooling temperature. Additionally, the mean size of precipitates decreases gradually. As the FCT varied between 672°C and 645°C, the steel plate strength and low temperature toughness were significantly improved. As the temperature is further reduced to 607°C, the strength increase was reduced. Due to the improvement of grain uniformity, the low temperature toughness was further enhanced to 156 J.
The effect of tightening torque on the strength of composite-metal hybrid joints
Authors: Wei Jingchao , Cao Su , Zhang Hui , Chen Xiangming , Yang Yu 
Published: March 2024

Abstract
In the manufacturing and assembly process of aircraft composite-metal hybrid structures, tightening torque is one of the important factors that control assembly quality and affect connection strength. This paper experimentally studies the mechanical properties of composite-metal single-bolt single-lap joints under different tightening torques, reveals the impact mechanism of different tightening torques on the manufacturing and assembly of composite-metal hybrid structures, and also establishes a finite element analysis model of hybrid connection structure considering the influence of drilling and assembly processes. The results show that the ultimate load of the composite-metal connection structure increased with the increase of tightening torque. When the tightening torques were 3 N·m, 6 N·m, and 9 N·m, the ultimate failure loads of the composite-metal hybrid joints were 12.9 kN, 13.8 kN, and 14.6 kN respectively.
Research electrical properties of Cu doped FeTe2 prepared by solid state reaction
Authors: Zeng Linghu , Shi Yunhao , Yang Guangji , Hu Panpan , Zhang Lang , Qin Bingke 
Published: March 2024

Abstract
The present study successfully prepared CuxFeTe2 (x=0.01, 0.05, 0.1, 0.15, and 0.2) compounds using a high-temperature solid state reaction sintering technique under preparation conditions ranging from 623 K to 823 K. The phase structure and microstructure of CuxFeTe2 were determined using X-ray diffraction and scanning electron microscopy. Simultaneously, we studied the Seebeck coefficient and electrical resistivity of the sample. It was found that the samples prepared at 673 K had a purer phase, and the thermal power coefficient was better for samples with a Cu doping concentration below 0.1.
Process characteristics of Q890D joint using hybrid fiber laser-arc hybrid welding
Authors: Shen Yuhang , Feng Jiecai , Luo Chuanwan 
Published: March 2024

Abstract
This article conducted a study on the process characteristics, structure, and properties of the Q890D joint. The results indicated that three-layer welding methods can obtain a joint free of pores and defects. The base metal was composed of a large amount of polygonal ferrite and dispersed granular carbides, while the weld metal consisted of lath martensite. The results also revealed that the average hardness of WM was 417.24 HV (20.7% higher than BM). The tensile performance of welded joints was better than that of BM. There were no obvious cracks on the surface of the bending specimens. Compared with BM, the impact strength and toughness of WM had been improved, since the impact toughness of HAZ was highly dispersed.
Analysis of disc movement during the closing process of axial flow check valves
Authors: Wang Ting , Li Na , Kong Beibei , Ni Xiaomei , Li Xiangbao 
Published: March 2024

Abstract
In a long-distance pipeline system, when the pump is stopped, the axial flow check valve will suddenly close under the pressure difference force of the medium, and the instantaneous valve disc will collide and impact the valve seat at a certain speed, which will have a certain impact on the structural strength and service life of the check valve. This article uses explicit dynamics to simulate the movement process of the instantaneous valve disc when it is completely closed and analyzes the velocity of the valve disc after the collision. Based on the spring damping model theory, the velocity of the valve disc after collision is derived. After error analysis, the reliability of numerical simulation has been verified, which has a certain guiding significance for the practical application and design improvement of axial flow check valves.
Design of a superconducting UWB bandpass filter with tunable notch band
Authors: Shang Zhaojiang , Huang Jianyong , Zhang Huibin , Yang Weijin 
Published: March 2024

Abstract
By studying the principles of ultra-wideband (UWB) and band-stop, a novel band-pass filter with adjustable band-stop characteristics is proposed. The filter achieves 3.1-10.6 GHz UWB bandpass characteristics through an improved multi-mode resonator. An L-shape λ/2 notch resonator loaded with a 2-bit reconfigurable interdigital capacitor (IDC) array is coupled to the multiple-mode resonator and generates a tunable notch band to reject any undesired signal that may interfere with the UWB passband. By connecting the IDC to the ground or not, the capacitance of each IDC and the corresponding notch frequency can be adjusted. After design and optimization, the final size of the superconducting filter is 20.0 mm × 6.9 mm, and the test results and simulation results are highly consistent.
Dynamic compressive property of extruded VW75-Ti (wt.%) alloy under high strain rates
Authors: Zhang Tong , Ma Minglong , Li Yongjun , Yuan Jiawei , Li Xinggang , Shi Guoliang , Sun Zhaoqian , Zhang Kui 
Published: March 2024

Abstract
The dynamic compressive properties of extruded VW75 and VW75+Ti alloys were investigated by using a split Hopkinson pressure bar (SHPB) at 25°C under high strain rates of 1, 600-2, 700 s-1 in the present work, and the microstructure evolution after deformation was inspected by OM, SEM, and EBSD. The results demonstrated that the maximum stress value rises with the escalating strain rate in the course of impact, and the true stress-true strain curves of the two alloys exhibit strain strengthening and positive strain effect. The addition of Ti particles refines alloy grains, increases fracture strength, and decreases the twinning ratio.
Formation and prevention of turning crack of screw for electronic parking brake system
Authors: Liu Dong , Li Liejun , Long Hu , Zhong Shoujun , Li Fuqiang , Gao Jixiang 
Published: March 2024

Abstract
The cracking of screws made from medium-carbon cold heading steel for the electronic parking brake system was studied through the analysis of the microstructure and the systematic investigation of the whole process, and the corresponding improvement measures were proposed at last. Results showed that the cracks initiated at the root of the threads due to insufficient plasticity generated by the large pressure during thread rolling were the resource of the fracture, which was further extruded during the turning process, while the centering condition was not well. It was necessary to adjust the appropriate parameters of rolling pressure and rolling time to avoid heavy work hardening and also pay attention to the cleanness on the surface of the rolling plate or the wheel.
Techno-economic analysis of hydrogen production systems based on solar/wind hybrid renewable energy
Authors: Song Chunyan , Zhang Bo , Cai Wenchao , Zhang Dounan , Yan Xianglin , Yang Tianqi , Xiao Jinsheng 
Published: March 2024

Abstract
With the popularity of renewable energy, more and more countries and regions are utilizing renewable energy to produce hydrogen. However, renewable energy hydrogen production systems are often large in capacity and equipment, and require rational design as well as performance analysis of the system to satisfy the technicalities while ensuring the economics. In this paper, 12 different renewable energy systems for hydrogen production, including 6 grid-connected systems and 6 off-grid systems, are designed considering solar and wind energy as the main renewable energy sources in a place in China. Subsequently, simulations were carried out using HOMER software to compare and analyze the economic and technical performance of different schemes of renewable energy hydrogen production systems, and the best grid-connected and off-grid renewable energy hydrogen production system schemes were selected based on the comparison results.
The characteristics of corn gluten-free cookies with modified cellulose as food additives
Authors: Herawati Heny , Kusniasari Indah , Sunarmani  , Kusnandar Feri , Agustinisari Iceu , Fetriyuna Fetriyuna , Hastuti Novitri , Eris Fitria Riany , Bachtiar Muchamad , Rahayu Eka 
Published: March 2024

Abstract
Several investigations were conducted to enhance the properties of gluten-free bakery items. Challenges in the development of gluten-free products involve a reduction in development capacity and product texture. One potential solution is to enhance the quality of gluten-free products by incorporating food additives from modified cellulose. The objective of this research to formulate and assess the impact of incorporating modified cellulose (CMC, MC, HPMC, and MCG) on the characteristics of gluten-free cookies made from corn flour. The study employed a completely randomized design for its investigation. The factor used was the type of cellulose derivative with an additional concentration of 1% with two replications. Based on the results of the study, it was shown that the addition of types of cellulose derivatives affected the characteristics of colour, proximate analysis results, and texture of gluten-free cookies from corn flour. The development ratio of HPMC cookies was nominally the highest at 12.38 (mm/gram), although statistically there was no significant difference between treatments. The fat content of the control cookies was higher at 19.16% compared to other cookies with added cellulose derivatives. The carbohydrate content of HPMC cookies is the highest at 88.00% compared to other cookies. This resulted in the lowest energy value of HPMC cookies at 389.26 kcal compared to other cookies. The microstructural profile based on SEM (Scanning Electron Microscope) of the resulting cookies shows different porosity. Based on the research results, adding several cellulose derivatives can improve the characteristics of gluten-free cookies from corn flour.
Detection of tetanus toxoid with iron magnetic nanobioprobe
Authors: Karkhaneh Farzaneh , Sadr Ziba Karimi , Rad Ahmad Molai , Divsalar Adele 
Published: March 2024

Abstract
Diagnosis of diseases with low facilities, speed, accuracy and sensitivity is an important matter in treatment. Bioprobes based on iron oxide nanoparticles are a good candidate for early detection of deadly and infectious diseases such as tetanus due to their high reactivity, biocompatibility, low production cost and sample separation under a magnetic field. In this study, silane groups were coated on surface of iron oxide nanoparticles using tetraethoxysilane (TEOS) hydrolysis. Also, NH2 groups were generated on the surface of silanized nanoparticles using 3-aminopropyl triethoxy silane (APTES). Antibody was immobilized on the surface of silanized nanoparticles using TCT trichlorothriazine as activator. Silanization and stabilized antibody were investigated by using of FT-IR, EDX, VSM, SRB technique. UV/vis spectroscopy, fluorescence, agglutination test and ELISA were used for biosensor performance and specificity. The results of FT-IR spectroscopy showed that Si–O–Si and Si-O-Fe bonds and TCT chlorine and amine groups of tetanus anti-toxoid antibodies were formed on the surface of iron oxide nanoparticles. The presence of Si, N and C elements in EDX analysis confirms the silanization of iron oxide nanoparticles. VSM results showed that the amount of magnetic nanoparticles after conjugation is sufficient for biological applications. Antibody stabilization on nanoparticles increased the adsorption intensity in the uv/vis spectrometer. The fluorescence intensity of nano bioprobe increased in the presence of 10 ng ml−1. Nanobio probes were observed as agglomerates in the presence of tetanus toxoid antigen. The presence of tetanus antigen caused the formation of antigen-nanobioprobe antigen complex. Identification of this complex by HRP-bound antibody confirmed the specificity of nanobioprobe. Tetanus magnetic nanobioprobe with a diagnostic limit of 10 ng ml−1 of tetanus antigen in a short time can be a good tool in LOC devices and microfluidic chips.
A microdosimetry analysis of reversible electroporation in scattered, overlapping, and cancerous cervical cells
Authors: Kumar Mayank , Mishra Ashutosh 
Published: March 2024

Abstract
We present a numerical method for studying reversible electroporation on normal and cancerous cervical cells. This microdosimetry analysis builds on a unique approach for extracting contours of free and overlapping cervical cells in the cluster from the Extended Depth of Field (EDF) images. The algorithm used for extracting the contours is a joint optimization of multiple-level set function along with the Gaussian mixture model and Maximally Stable Extremal Regions. These contours are then exported to a multi-physics domain solver, where a variable frequency pulsed electric field is applied. The trans-Membrane voltage (TMV) developed across the cell membrane is computed using the Maxwell equation coupled with a statistical approach, employing the asymptotic Smoluchowski equation. The numerical model was validated by successful replication of existing experimental configurations that employed low-frequency uni-polar pulses on the overlapping cells to obtain reversible electroporation, wherein, several overlapping clumps of cervical cells were targeted. For high-frequency calculation, a combination of normal and cancerous cells is introduced to the computational domain. The cells are assumed to be dispersive and the Debye dispersion equation is used for further calculations. We also present the resulting strength-duration relationship for achieving the threshold value of electroporation between the normal and cancerous cervical cells due to their size and conductivity differences. The dye uptake modulation during the high-frequency electric field electroporation is further advocated by a mathematical model.
Computational capabilities and compiler development for neutral atom quantum processors—connecting tool developers and hardware experts
Authors: Schmid Ludwig , Locher David F , Rispler Manuel , Blatt Sebastian , Zeiher Johannes , Müller Markus , Wille Robert 
Published: March 2024

AbstractNeutral Atom Quantum Computing(NAQC) emerges as a promising hardware platform primarily due to its long coherence times and scalability. Additionally, NAQC offers computational advantages encompassing potential long-range connectivity, native multi-qubit gate support, and the ability to physically rearrange qubits with high fidelity. However, for the successful operation of a NAQC processor, one additionally requires new software tools to translate high-level algorithmic descriptions into a hardware executable representation, taking maximal advantage of the hardware capabilities. Realizing new software tools requires a close connection between tool developers and hardware experts to ensure that the corresponding software tools obey the corresponding physical constraints. This work aims to provide a basis to establish this connection by investigating the broad spectrum of capabilities intrinsic to the NAQC platform and its implications on the compilation process. To this end, we first review the physical background of NAQC and derive how it affects the overall compilation process by formulating suitable constraints and figures of merit. We then provide a summary of the compilation process and discuss currently available software tools in this overview. Finally, we present selected case studies and employ the discussed figures of merit to evaluate the different capabilities of NAQC and compare them between two hardware setups.
Storm surge changes around the UK under a weakened Atlantic meridional overturning circulation
Authors: Howard Tom , Palmer Matthew D , Jackson Laura C , Yamazaki Kuniko 
Published: March 2024

Abstract
Climate model projections of future North Atlantic storm track changes under global warming are very uncertain, with models showing a variety of responses. Atmospheric storms force storm surges which are a major contributor to coastal flooding hazard in the UK, and so it is important to know how this process might be influenced by climate change—not only what future is probable, but what is possible? As a contribution to answering that question, we drive a simplified model of the north-west European coastal shelf waters with atmospheric forcing taken from climate simulations with HadGEM3-GC3-MM (1/4 degree ocean, approx. 60 km atmosphere in mid-latitudes) which exhibit a substantial weakening of the Atlantic Meridional Overturning Circulation (AMOC). The first is a ‘hosing’ simulation in which a rapid shut-down of the AMOC is induced by modelling the addition of freshwater to the North Atlantic. The second is the HadGEM3 GC3.05 perturbed parameter ensemble simulation under Representative Concentration Pathway 8.5 (RCP 8.5) which was used to inform the UK Climate Projections 2018 (UKCP18). This model has a high climate sensitivity and exhibits substantial weakening of the AMOC. We find substantial simulated increases at some sites: up to about 25% increase in the expected annual maximum meteorological component of the storm surge. In both the hosing simulation and the ensemble simulation, the greatest projected increases are seen at some west coast sites, consistent with strengthening of the strongest westerly winds. On the south-east coast, projected changes are smaller in the hosing simulation and generally negative in the ensemble simulation. The ensemble simulation shows a decrease in the strongest northerly winds as well as the growth in the westerlies. Overall, these low-likelihood increases over the 21st century associated with storminess are smaller than the likely contribution from mean sea-level rise over the same period, but, importantly, larger than the so-called “high-end” changes associated with storminess that were reported in UKCP18.
A critical review on the application of machine learning in supporting auxetic metamaterial design
Authors: Zhang Chonghui , Zhao Yaoyao Fiona 
Published: March 2024

Abstract
The progress of machine learning (ML) in the past years has opened up new opportunities to the design of auxetic metamaterials. However, successful implementation of ML algorithms remains challenging, particularly for complex problems such as domain performance prediction and inverse design. In this paper, we first reviewed classic auxetic designs and summarized their variants in different applications. The enormous variant design space leads to challenges using traditional design or topology optimization. Therefore, we also investigated how ML techniques can help address design challenges of auxetic metamaterials and when researchers should deploy them. The theories behind the techniques are explained, along with practical application examples from the analyzed literature. The advantages and limitations of different ML algorithms are discussed and trends in the field are highlighted. Finally, two practical problems of ML-aided design, design scales and data collection are discussed.