bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of annealing on the microstructure and performance of thin-film Pt resistance temperature sensors: experiments and finite element simulations
Authors: Liu Shu-Hang , Zhang Xin-Ping , Cao Shanshan , Zhou Min-Bo 
Published: May 2024

Abstract
Platinum resistance temperature sensors have a wide range of applications in various fields, where a high temperature coefficient of resistance (TCR) is a crucial requirement. In this study, thin-film Pt resistance temperature (TPRT) sensors were fabricated on an Al2O3 substrate using a micro-electro-mechanical system (MEMS) based surface micromachining process, and Pt resistance wafers were annealed at a temperature range from 500°C to 800°C using rapid thermal process (RTP). Experimental and simulation results show that TPRT sensors fabricated on the substrate with a rough surface exhibit lower thermal stress. Meanwhile, more pores appear in the Pt thin film, reducing TCR. However, high temperature annealing significantly influences the microstructure of the Pt film and brings about an obvious increase in TCR despite, introducing thermal stress at the interface. Considering the impact of the heat treatment process, the fabricated TPRT sensors demonstrate excellent performance with a TCR of 3512 ppm/°C.
Research on drilling hole sequence planning based on a double-arm drilling machine
Authors: Zhu Limin 
Published: May 2024

Abstract
Based on the integrated structure characteristics of the double-arm drilling machine, there are two kinds of interference between drilling and excavation operations. Through the simplified calculation of the structure model of the left and right drilling arms, the drilling range of the double-arm drilling and loading machine is obtained. Through the calculation of the structure model of the excavation arm, the excavation range is obtained. The interference area and pure interference area exist in the operation range of the three working arms. Taking the drilling arrangement of the section of the 2556 north wing transport lane in Xinji No.1 Mine as an example, the drilling hole sequence to avoid interference is planned for the 52 drilling holes in the drilling range and interference range of the left and right drilling arms, which solves the operation interference of the three working arms and plans two optimal drilling hole sequences. It provides a reference for the subsequent industrial application of various types of drilling machines in coal mines.
Comparative analysis of dynamic load characteristics of artillery steering gear based on different MBD methods
Authors: Si Dongya , Yu Kaiping , Luo Tianfang , Fang Wenmin , Ru Yan 
Published: May 2024

Abstract
The multi-body dynamics analysis model of the steering gear of a certain type of artillery was established. The dynamic load characteristics of the output gear of the steering gear motor and its driven gear under the given speed and load conditions were calculated based on the three different MBD analysis methods, such as the speed, meshing force, and contact stress. Through the comparative analysis, it was concluded that the calculation results of rigid-flexible coupling analysis were closer to the theoretical value and the fluctuation range was smaller, which provides reference and basis for the prediction of gear fatigue life and the optimization design under dynamic load conditions.
3D printing path method for multi-tow continuous carbon fiber
Authors: Zeng Lingwei , Zhang Fan , Zhang Xinghua , Tu Yiwen 
Published: May 2024

Abstract
Carbon fiber composite materials have many excellent characteristics such as high temperature resistance, friction resistance, thermal conductivity and corrosion resistance, so carbon fiber composite materials have become the first choice for printing materials. In order to improve the printing efficiency of carbon fiber 3D printing technology, it has been expanded to four side-by-side nozzles based on traditional single nozzles, and four nozzles are bound to print side by side. The four-nozzle side-by-side printing path has the problem of coordinating the motion planning of each nozzle, controlling the squeezing difference of each nozzle, and adjusting the angle of the print head, so it is necessary to reasonably control the squeezing amount of each nozzle and the angle of the print head. After the slicing processing based on the existing model, the Gcode code of the model is obtained. The Gcode code of the model is processed through the multi-tow continuous carbon fiber 3D printing path planning algorithm. The movement trajectory of each nozzle of the printer is reasonably planned based on the outer wall coordinates and the extrusion amount of each nozzle is controlled. Finally, the snipping instruction is executed after a circle of trajectory to print the next layer of motion trajectory, which ultimately improves the 3D printing while ensuring the accuracy of multi-beam model 3D printing.
Composite wick heat pipe fabrication and performance study
Authors: Wei Juguo , Huang Silong , Jiang Qing , He Xinhua 
Published: May 2024

Abstract
A composite wick heat pipe is designed and prepared: a copper mesh is fixed on the copper pipe, and copper powder is filled in the gap between the mesh and the mandrel through the mandrel. A test device is assembled to test the maximum thermal conductive power and temperature stabilization time of the heat pipe. The results show that: the composite wick structure and the copper powder structure compared with the ultimate heat transfer performance increased by 20%, when the heat capacity is increased, the overall temperature difference will increase accordingly, and the optimal liquid injection rate of 100%, the ultimate power of up to 100 W, when filling with powder, it has the best thermal conductivity, the ultimate heat transfer power in the state of gravity is three times higher than that of the state of resistance to gravity, and it is 28.6% higher than that in the state of horizontality. The composite wick structure starts 17.6% faster than the copper powder structure.
Study on the performance of porous polyimide bearing cage material modified with molybdenum disulfide and glass fiber
Authors: Chen Jiangxiong , Qin Hongling , Xu Xiang , Zeng Yi , Chen Kangni 
Published: May 2024

Abstract
This study explores material modification utilizing molybdenum disulfide and glass fiber as lubricating and reinforcing modified materials respectively. The specimens underwent tests for mechanical-physical properties, oil storage capacity and frictional characteristics. The differential analysis identified the optimal mechanical-physical properties of the porous composite PI material at a molding pressure of 192 MPa, molding temperature of 330°C, 9% of AC foaming agent content, 8% of molybdenum disulfide content, and 20% of glass fiber content. The wear coefficient increased with load and decreased with rotational speed, indicating the suitability of this porous composite oil-retaining PI material for medium-high-speed and low-load frictional conditions.
Study of rupture behavior of 40Cr ring-scored bursting diaphragms
Authors: Tao Jie , Pan Xiaobin , Gao Qixuan , Yao Yi 
Published: May 2024

Abstract
The rupture diaphragm is a key part of pressure control in the launcher and the reliability of the rupture pressure is directly related to the internal ballistic performance. In order to study the rupture behavior of the 40Cr annular scored diaphragm under internal ballistic conditions and the remaining thickness of the diaphragm’s scoring, the stress-strain curve of the diaphragm is obtained by fitting the internal ballistic loading curve and simulation, the relationship between the rupture pressure and the remaining thickness of the scoring is established and the accuracy of the simulation is verified by the blasting test.
Effect of mo content on the microstructure and properties of powder metallurgy iron based friction materials
Authors: Qin Qun , Wang Tianguo 
Published: May 2024

Abstract
This article uses powder pressing and sintering methods to prepare iron-based friction materials. The influence of molybdenum on the microstructure and comprehensive properties of powder metallurgy friction materials was studied from the aspects of density, hardness, and wear resistance. The results show that with the increase of Mo mass fraction, the sintering density of iron-based friction materials gradually increases, and the hardness of sintered materials first shows an increasing trend. As the Mo content increases by more than 12%, the hardness of sintered friction materials decreases. With the addition of Mo, the wear amount of the friction material first decreases and then increases. When the mass fraction of Mo added to the sintered friction material is 12%, the wear rate of the material is lower than that of other samples, and it has good wear resistance. Adding Mo element to iron copper based friction materials improves the wear resistance of sintered friction materials due to the strengthening effect of Mo.
Electrochemical study on under-deposit corrosion evolution of oil pipelines
Authors: Yang Chao 
Published: May 2024

Abstract
In the development of oil and gas fields, due to the sand, calcium, and magnesium ions in the produced liquid, the under-deposit corrosion formed by deposition during the transportation process has become one of the key factors of pipeline failure. Therefore, aiming at the problem of CaCO3 under-deposit corrosion in CO2-flooded oil pipelines, this paper studied the influence of deposit thickness change on metal corrosion based on electrochemical experiments, image characterization, and corrosion product analysis. The results showed that the corrosion process of the deposit layer can be divided into three stages. (1) The deposit layer promoted the movement of the electrolyte and then enhanced the corrosion rate of the matrix, leading to the increase of the size and maximum pit depth of the matrix, which was manifested as a rapid negative shift of the open circuit potential. (2) The deposit layer played a certain physical shielding role, leading to the size and maximum pit depth of the pit decreasing, and the number of pits increasing, at which the open circuit potential basically remained unchanged. (3) The deposit layer can play an effective physical shielding role, and the oxygen concentration corrosion inside and outside the deposit layer made the number of pits increase sharply, which was manifested as a slow negative shift of open circuit potential. The deposit layer mainly affected the cathode reaction process of the corrosion process. With the increase of the deposit thickness, the metal corrosion intensified with an increasing corrosion current density.
Investigation of segregation behaviour in 2060 aluminium-lithium alloy during twin-roll casting
Authors: Yu Wei , Li Yong 
Published: May 2024

Abstract
The utilization of the twin-roll casting process to fabricate aluminium (Al) - lithium (Li) alloys is regarded as an efficient and energy-saving strategy to meet the aerospace industry’s demands for reducing processing steps, cost-effectiveness, and corrosion resistance. This study successfully achieved the preparation of Al-Li alloy twin-roll cast slabs across various processing ranges to investigate the corrosion resistance differences in different processing conditions. Remarkable macro segregation phenomena were observed in the fabrication under high twin-roll casting speeds for TRC-3. By combining temperature and flow rate calculations, we comprehensively analysed the results of this segregation mechanism. The segregation is inherited into the final T6 state microstructure, exacerbating the precipitation of the T1 phases and deteriorating the ultimate corrosion resistance performance. We delved into a profound discussion regarding the mechanistic impact of segregation on corrosion behaviour. Ultimately, this study postulates a process parameter range for twin-roll casting of Al-Li alloys, aimed at attaining minimal segregation and maximal corrosion resistance.
Renormalization group flows from the Hessian geometry of quantum effective actions
Authors: Kluth Yannick , Millington Peter , Saffin Paul M 
Published: May 2024

Abstract
We explore a geometric perspective on quantum field theory by considering the configuration space spanned by the correlation functions. Employing n-particle irreducible effective actions constructed via Legendre transforms of the Schwinger functional, this configuration space can be associated with a Hessian manifold. This allows for various properties and uses of the n-particle irreducible effective actions to be re-cast in geometrical terms. In the 2PI case, interpreting the two-point source as a regulator, this approach can be readily connected to the functional renormalization group. Renormalization group flows are then understood in terms of geodesics on this Hessian manifold.
Passive and active field theories for disease spreading
Authors: te Vrugt Michael , Jeggle Julian , Wittkowski Raphael 
Published: May 2024

Abstract
The worldwide COVID-19 pandemic has led to a significant growth of interest in the development of mathematical models that allow to describe effects such as social distancing measures, the development of vaccines, and mutations. Several of these models are based on concepts from soft matter theory. Considerably less well investigated is the reverse direction, i.e. how results from epidemiological research can be of interest for the physics of colloids and polymers. In this work, we consider the susceptible-infected-recovered (SIR)-dynamical density functional theory (DDFT) model, a combination of the SIR model from epidemiology with DDFT from nonequilibrium soft matter physics, which allows for an explicit modeling of social distancing. We extend the SIR-DDFT model both from an epidemiological perspective by incorporating vaccines, asymptomaticity, reinfections, and mutations, and from a soft matter perspective by incorporating noise and self-propulsion and by deriving a phase field crystal (PFC) model that allows for a simplified description. On this basis, we investigate via computer simulations how epidemiological models are affected by the presence of non-reciprocal interactions. This is done in a numerical study of a zombie outbreak.
Utilization of Landsat Imagery and Google Earth Engine to Analyze the Urban Growth Dynamics in Thuan An City, Binh Duong Province
Authors: Thi Anh Thu Tran , Thi An Tran , Le Tan Dat Nguyen , Kim Loi Nguyen 
Published: May 2024

Abstract
The study utilized satellite imagery data including Landsat 7 and Landsat 9 combined with Google Earth Engine to classify and evaluate the urban land cover for the period from 2012 to 2022. Supervised classification based on random forest algorithm has been carried out on Google Earth Engine cloud-computing platform to map the urban land cover of Thuan An city, Binh Duong province, Vietnam. The research findings provide a clear understanding of urban dynamics in Binh Duong province during the years from 2012 to 2022. Over this time period, the urban area in Thuan An has nearly doubled, increasing from 2,793 hectares to 5,059 hectares. This information will assist urban managers and local planners in gaining insights into the scale and trends of urban development, enabling them to implement effective management and sustainable development measures for the city and its environment.
Developing a tool to identify residential areas out of preschool service areas with buffer analysis
Authors: Hoang Oanh Huynh , Thong Nhat Tran 
Published: May 2024

Abstract
Preschool education is the first level of education system and the foundation for the sense of learning that is to develop physically and mentally of each person. The provision of adequate preschools for all children to attend preschool is a requirement in Viet Nam today. The development of residential areas in big cities has seen many areas lack preschools in recent years. However, to identify areas where there is a potential lack of preschools accurately, tools with the right technology and data are needed. With that need, the study applied GIS technology with buffer space analysis to identify sufficient residential areas and lack of preschools when there are preschool locations in the area to be identified. Through the test results for the distribution of school sites in different residential areas, the tool has produced accurate, fast and efficient calculation results compared to manual calculations. This tool is easy to implement because it does not need a lot of data, but to increase the accuracy and reality of distances when determining the area serving each school site, it is necessary to study additional traffic network data and apply network analysis tool
Application of GIS and Multi-Criteria Analysis (MCA) in Land Evaluation at Ninh Phuoc District, Ninh Thuan Province, Vietnam
Authors: Hoang L H , Tran T T , Luyen H C , Nguyen D H , Nguyen T H 
Published: May 2024

Abstract
This study was conducted to assess land suitability (land evaluation) in the Ninh Phuoc districts in order to identify evidence for recommending main crops effectively and sustainably using agricultural land under drought conditions. Results indicated that Ninh Phuoc district had 83 land mapping units (LMUs), with 10 main land use types (LUTs) of rice, annual cash crops, and perennial plants. About 99.2% of agricultural land was classified as high suitability (S1), moderate suitability (S2), and marginal suitability (S3) for most LUTs, while non-suitability (N) lands were very small (0.8%). This study’s land suitability classification analysis has offered valuable insights into the current land use situation in Ninh Phuoc district and proposes sustainable land management recommendations. It has taken into account various land use criteria and assumptions. The study has proposed the following actions for sustainable land use: (i) Maintain highly suitable (S1) and moderately suitable (S2) land areas, (ii) Renovate or convert marginally suitable land (S3) to suitable tree planting/forestation, (iii) Convert unsuitable land (N) to forestry, grass, or plants that enhance soil quality, and (iv) Preserve existing forest areas without encroachment. Specific results in Ninh Phuoc district when applying land suitability classification for future orientation are as follows: maintain 14,859.31 ha, which has high suitability (S1) and moderate suitability (S2) levels; maintain 30.78 hectares of grass and convert 335 hectares to other suitable trees/forest plantations for the suitable marginal area (S3); Convert 122 ha of Not Suitable (N) to afforestation/grass/apply land soil improvement measure; For more than 3700 hectares of unused land, put into use 343.53 ha for growing spice plants, 8.67 ha for rice, 677.18 ha for planting forest trees, 2,691.50 ha for development of pasture and grazing.
Analyzing Rice land changes using Remote sensing and GIS in Ben Tre province, Viet nam
Authors: Huynh Yen Nhi , Le Ngoc Lam 
Published: May 2024

Abstract
Ben Tre province is located at the downstream of the Mekong river system where there are three ecosystems: saline, brackish and freshwater, which create favorable conditions for the development of the horticultural economy and the marine economy. Faced with the impact of climate change and market demand, agricultural planning has been adjusted to land use planning. In which, the rice land area was adjusted to decrease to suit the actual situation. This study applies Remote Sensing and Geographic Information Systems (GIS) to assess the change process in the rice land area of Ben Tre province over 6-time points 2000, 2005, 2010, 2015, 2020, and 2023. Through land cover classification results from Landsat and Sentinel-2 satellite image data, the study analyzes the process of converting rice land to other land types. From there, the study evaluates the effectiveness of converting agricultural land use purposes. The research results contribute to connecting the master plan for socio-economic development with land use planning in the future.
Molten glass-mediated conditional CVD growth of MoS2 monolayers and effect of surface treatment on their optical properties
Authors: Aras Fikret Gonca , Suleiman Abdulsalam Aji , Parsi Amir , Kasirga Talip Serkan , Yeltik Aydan 
Published: May 2024

Abstract
In the rapidly developing field of optoelectronics, the utilization of transition-metal dichalcogenides with adjustable band gaps holds great promise. MoS2, in particular, has garnered considerable attention owing to its versatility. However, a persistent challenge is to establish a simple, reliable and scalable method for large-scale synthesis of continuous monolayer films. In this study, we report the growth of continuous large-area monolayer MoS2 films using a glass-assisted chemical vapor deposition (CVD) process. High-quality monolayer films were achieved by precisely controlling carrier gas flow and sulfur vaporization with a customized CVD system. Additionally, we explored the impact of chemical treatment using lithium bistrifluoromethylsulfonylamine (Li-TFSI) salt on the optical properties of monolayer MoS2 crystals. To investigate the evolution of excitonic characteristics, we conditionally grew monolayer MoS2 flakes by controlling sulfur evaporation. We reported two scenarios on MoS2 films and flakes based on substrate-related strain and defect density. Our findings revealed that high-quality monolayer MoS2 films exhibited lower treatment efficiency due to substrate-induced surface strain. whereas defective monolayer MoS2 flakes demonstrated a higher treatment sensitivity due to the p-doping effect. The Li-TFSI-induced changes in exciton density were elucidated through photoluminescence, Raman, and x-ray photoelectron spectroscopy results. Furthermore, we demonstrated treatment-related healing in flakes under variable laser excitation power. The advancements highlighted in our study carry significant implications for the scalable fabrication of diverse optoelectronic devices, potentially paving the way for widespread real-world applications.
Dynamic control of spontaneous emission using magnetized InSb higher-order-mode antennas
Authors: Aghili Sina , Alaee Rasoul , Ahmadnejad Amirreza , Mobini Ehsan , Mohammadpour Mohammadreza , Rockstuhl Carsten , Dolgaleva Ksenia 
Published: May 2024

Abstract
We exploit InSb’s magnetic-induced optical properties to design THz sub-wavelength antennas that actively tune the radiative decay rates of dipole emitters at their proximity. The proposed designs include a spherical InSb antenna and a cylindrical Si-InSb hybrid antenna demonstrating distinct behaviors. The former dramatically enhances both radiative and non-radiative decay rates in the epsilon-near-zero region due to the dominant contribution of the Zeeman-splitting electric octupole mode. The latter realizes significant radiative decay rate enhancement via magnetic octupole mode, mitigating the quenching process and accelerating the photon production rate. A deep-learning-based optimization of emitter positioning further enhances the quantum efficiency of the proposed hybrid system. These novel mechanisms are promising for tunable THz single-photon sources in integrated quantum networks.