bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental and numerical simulation research on fluid pressure drop inside sintered metal porous plates
Authors: Lin Shengcun , Shi Fusheng , Feng Wenxiu 
Published: June 2024

Abstract
At present, research on fluid flow characteristics in porous media is mostly conducted through experimental and simulation methods, and some damping prediction models for fluid flow in porous media have been proposed. These prediction models may not be entirely suitable for all porous media, as porous media have various factors such as complex pore channels, resulting in vastly different calculation results for different prediction models on the same porous media. Based on experiments, this article adopts the standard k in numerical simulation research k -ε. The turbulence model is used to simulate the flow of liquid in porous plates, and the comparison between numerical simulation results and experimental results proves the standard k-ε. The turbulence model can be well applied in the numerical simulation of porous plates prepared in this paper, providing feasible references for the numerical simulation of the fluid performance of porous plates.
Stamping process analysis and progressive die design of l-panel for specific car seats
Authors: Zhang Huiju , Li Chunhui , Zhuo Liyun 
Published: June 2024

Abstract
The frequent use of electric vehicle seats will lead to the loosening of their fixing devices, which will bring certain safety risks. This article studied the core component of the fixing device - L-panel, analyzed its forming process performance and focused on controlling the springback during its forming process, so as to prevent any issues related to low position accuracy when securing electric seats. Moreover, the die design was also carried out. A set of 8-station progressive dies was completed, which was of good precision, high production rate, good feasibility for mass production, good product interchangeability, and extremely high intelligent automation production.
Preparation and regulation of electromagnetic parameters of Ti3C2Tx@Ni composite powders
Authors: Hu Shujun , Li Shibo , Pan Peng , Ge Feng , Yang Ming , Yu Jinxi , Wang Jinnan 
Published: June 2024

Abstract
Novel electromagnetic (EM) materials with adjustable EM properties are anticipated to fulfill the requirements of electronic communication, national defense, and aerospace fields. In this study, functional Ti3C2T
x
@Ni composite powders with adjustable Ni content were successfully prepared using a facile electroless plating strategy. The EM parameters can be regulated by controlling the Ni content in Ti3C2T
x
@Ni composite powders. As the Ni content increases, the values of real and imaginary parts of the complex permittivity of the Ti3C2T
x
@yNi/wax (y = 10 ~ 80) in the 2-18 GHz show a trend of initially decreasing and then increasing. The real and imaginary parts of the complex permeability of Ti3C2T
x
@yNi/wax range from 0.95 to 1.03 and −0.10 to 0.07, respectively. After introducing magnetic Ni, Ti3C2Tx exhibits dielectric and magnetic losses on EM waves, with dielectric losses having a greater dissipation on the EM waves.
Research on smart manufacturing technology of reinforcing bars for bridge precast concrete structure
Authors: Liu Tiancheng , Zhu Chao , Tong Zengyi , Luo Dongchao 
Published: June 2024

Abstract
As the main material in the production process of a concrete segmental beam in the traditional infrastructure industry, the processing automation is low and the quality is difficult to control, which affects the overall mechanical properties of the structure. To improve the efficiency and quality of steel processing, regarding the segmental beams of Huangmaohai Link as the research object, adopting the idea of the combination of “software & hardware”, the reinforcement model established by BIM technology is used as the data source of intelligent building, and the intelligent tooling is used as the “executor” of brilliant construction data source, and the soft and hard interaction. The results show that visualization simulation optimization of steel reinforcement and the control of intelligent construction data sources of steel reinforcement can be realized through BIM technology. The correct BIM-reinforced model can optimize the nesting and generate the blanking list based on the integer programming algorithm so that the residual material rate of the material is the lowest, which is conducive to cost-saving control. The intelligent tooling equipment can read the blanking list into the equipment, realize the intelligent processing of the semi-finished products of steel bars and mesh, and ensure the quality of reinforcement processing, which can enhance the disaster prevention ability of Bridges. Finally, the steel BIM model will be transformed into an engineering entity through intelligent tooling with high efficiency and low cost, which enhances the ability of bridges to prevent earthquakes and reduce disasters. Research results will drive the development of smart manufacturing technologies in the overall infrastructure industry.
The structure evolution of austenite stainless steel with pre-shot peening during plasma nitriding
Authors: Shen Lie , Wang Wei , Zhao Wei , Hui Zhuofan , Sui Jianghua , Sun Peng 
Published: June 2024

Abstract
Austenitic stainless steel is a very promising metal bipolar plate for proton exchange membrane fuel cells (PEMFC), which has advantages such as high mechanical strength, easy processing, and low cost. However, it is prone to corrosion in the acidic environment of PEMFC, which can have adverse effects on its lifespan and conductivity. By adopting a composite modification method to generate a dense nitride structure on the surface of 304 stainless steel bipolar plates, the corrosion resistance of the bipolar plate substrate can be improved. In this paper, shot peening pretreatment and plasma nitriding hybrid modification methods were employed to improve nitriding efficiency and reduce nitriding critical temperature, which generated a modified layer with good corrosion resistance on the surface of 304 austenitic stainless steel.
Characteristics analysis on 3D blade tip clearance response with regard to turbine blade crack azimuth angle
Authors: Fan Bochao , Zhang Xiaodong , Xiong Yiwei 
Published: June 2024

Abstract
In view of the insufficiency that blade tip timing signals offer merely one-dimensional information, which restricts the extraction of fault characteristics during the detection of blade cracks, a three-dimensional blade tip clearance (3D-BTC) finite element (FE) model of aero-engine turbine blade-disk-shaft system is developed. With the proposed FE model, the effect of crack azimuth angle on the 3D-BTC of aero-engine turbine blades is analyzed. Firstly, a FE model of the aero-engine turbine blade-disk-shaft system is established. Then, the through crack is introduced at the blade, and the blade deformation under the influence of cracks at different roll angles and pitch angles is calculated by transient dynamics analysis. Finally, the spectrum of the 3D-BTC is obtained, and the characteristics of the 3D-BTC response concerning blade crack azimuth angle are investigated. The results show that the crack reduces the blade stiffness and affects the 3D-BTC. The 3D-BTC decreases with the enlargement of the crack roll angle, and it shows a decrease and then an increase as the crack pitch angle becomes larger. The radial tip clearance is easily affected by the position of the measurement point, while the circumferential deflection angle and the axial deflection angle at different measurement points show a consistent trend. The information on cracks can be reflected more accurately on the basis of the 3D-BTC.
Efficient drainage design of cathode catalyst layer for pure oxygen proton exchange membrane fuel cells
Authors: Bai Ying , Cheng Ming , Cheng Xiaojing , Li Huiyuan , Shen Shuiyun , Yan Xiaohui , Zhang Junliang 
Published: June 2024

Abstract
To promote the application of pure oxygen proton exchange membrane fuel cell (PEMFC) technology in unmanned underwater devices, it is crucial to effectively address the water management problem of the PEMFC. The membrane electrode assembly (MEA) serves as a key component for electrochemical reactions and mass transfer, and the physicochemical properties of the porous structure of the cathode catalyst layer (CCL) determine the efficient transport of reactants and products inside the electrode. In this paper, the effect of hydrophobic modification of polytetrafluoroethylene (PTFE) nanoparticles in the CCL on cell performance was investigated through comprehensive electrochemical tests and physical characterizations. The performance of the optimally modified MEA was significantly improved by 84.6% compared with that of the conventional MEA, which could be mainly attributed to less residual liquid inside the electrode by the hydrophobic modification of PTFE, further proven by electrochemical impedance spectroscopy (EIS) results. The optimization would significantly mitigate the flooding phenomenon in pure oxygen PEMFC and facilitate the continuity of the redox reaction in a highly efficient way.
Numerical simulation of electron beam welding and local heat treatment of TC4 titanium alloy sheet
Authors: Gu Sendong , Zhao Jipeng , Ma Yanlong , Yang Wenbo , Yu Bin , Wang Tian 
Published: June 2024

Abstract
The paper object of this proposal was the electron beam welding (EBW) and electron beam local heat treatment (EBLHT) of a titanium alloy sheet. A three-dimensional thermal-mechanical coupled finite element (FE) model is established based on the FE software, and its secondary development function. Electron beam scanning experiments were performed on an 8 mm thick TC4 titanium alloy sheet. The cross-sectional morphologies of the different fusion zones are obtained. Weld surface width and weld penetration are compared between experimental results and simulated data. The model analyzed the temperature distributions on the sheet during the EBW and EBLHT processes.
Application of weibull model and birnbaum-saunders model in fracture life prediction of 316l stainless steel joint at 550°C
Authors: Hu Yunyi , An Ziliang , Sun Yannan , Li Xinxin 
Published: June 2024

Abstract
In this paper, the 316L-SS fracture life data obtained by stretching the specimens at 550°C high temperature is comparatively analyzed by Weibull distribution and Birnbaum-Saunders distribution. The tensile strength corresponding to the high-temperature fracture characteristic life of 316L-SS diffusion bonding joints based on the Weibull model is given by power law distribution. The final result indicates that the BS analysis model has high reliability from the perspective of engineering, and the Weibull model is practical in materials science research.
Study of thinning rate in incremental forming with hydraulic pressure supports based on taguchi design
Authors: Shang Miao , Li Yan , Yang Mingshun , Shi Panrong 
Published: June 2024

Abstract
Incremental sheet forming technology has great potential for forming thin-walled parts. However, the excessive thinning rate and uneven thickness distribution seriously affect the performance of forming. To reduce the sheet thickness reduction rate during the incremental forming process, hydraulically supported incremental forming technology is adopted, the thickness reduction rate of parts with different pressures, sheet thicknesses, and sizes was experimentally investigated and optimized by using Taguchi’s method. The results show that in the designed experimental scheme, the most significant elements affecting the thickness reduction rate are the forming angle and hydraulic pressure; the optimum thickness reduction rate is obtained by selecting the appropriate hydraulic pressure, lower forming angle, and larger sheet thickness. In incremental forming, this helps to enhance the thickness uniformity of parts, the quality, and the formability of the form.
Study of temperature conduction processes in sandwich structures
Authors: Zou Duoyijia , Chang Geng , Du Wei , Pan Xuchao 
Published: June 2024

Abstract
The sandwich structure is a common protective design that has been extensively used in the field of protection, but few studies have been done on its multilayer temperature conduction characteristics. Based on one typical sandwich protective structure, a temperature conduction model is established. The IMEX method is used to solve the established model, and then the attenuation rate of the temperature field with changes in the protective structure’s dimensions is theoretically calculated. Simultaneously, a simulation experimental platform is set up, and temperature conduction experiments are conducted. The results show that the theoretical model could describe the temperature conduction process of the sandwich structure, and the experimental results are in good agreement with the theoretical calculations; when the structural parameters are fixed, the temperature of each layer of the material increased gradually with time and finally tended to be stabilized. The rate of change of temperature is the largest in 0 s ~ 200 s; when the parameters are fixed in time, the temperature decreases gradually with the change of spatial position and finally tends to be stabilized. The thermal conduction rate of each layer of the material determines its change. The temperature change rate of the heat insulation layer and air layer is relatively high. The research can provide support and reference for the design of sandwich temperature protection structures.
Experimental studies of anodized Al surface with composite nanopore structures to enhance the anti-icing properties of transmission lines
Authors: Li Bo , Jie Bai , Fan Lei , Zeng Huarong , Mu Hao , Dai Xu , Xiao Jie , Hua Xujiang , Li Qi , Yuan Yuan , Liao Ruijin 
Published: June 2024

Abstract
Anti-icing is crucial for transmission conductors to avoid long-term power outages caused by severe icing climates. Here, superhydrophobic aluminum conductors with composite honeycomb nanopore structures were prepared by the twice-anodic oxidation method. Effects of the anodized current density on the surface morphology, structure, hydrophobicity, and anti-icing performance were experimentally studied. As the current density increases, the film thickness of the lower layer of a small nanopore structure increases, while the dissolution effect on the upper layer of a large nanopore structure is strengthened. Also, the composite nanopore structure exists in the damaged condition and has a rougher surface at the micron level. By comparing the surface wettability and anti-icing performance of all samples, the sample under the current density of 0.01875A/cm2 showed the optimal anti-icing properties, including a contact angle (CA) of 168°, the ice adhesion force of 4.87 kPa, and the longest frost formation time. The good anti-icing performance makes the anodized aluminum of composite nanopore structures a satisfactory candidate for improving their anti-icing behavior in the industry.
Electrolytic polishing process of intravascular nitinol stents
Authors: Zhu Lin , Teng Ruijing , Zhao Jonathon , Tu Jiangping 
Published: June 2024

Abstract
The incidence of peripheral arterial disease (PAD) is steadily rising in China due to the aging population, and the number of PADs requiring intervention is increasing. Minimally invasive treatment is an effective method to treat PAD, and nitinol alloy vascular stent has become an effective and safe minimally invasive treatment method. Nitinol stent has a favorable shape memory effect, super elasticity, and biocompatibility. Stents need to have good corrosion resistance and biocompatibility in blood vessels, so the surface treatment of stents is particularly critical. This research mainly studies the effect of electrolytic polishing technology on the surface of nitinol alloy stents. The specific research results are as follows: when the polishing time is 60 S and the polishing current is 2 A-2.5 A, the surface of the stent is brighter and the surface roughness of the stent is lower. Using a pulse power supply as the polishing power supply, when the duty cycle is 50%, the surface of the stent is better and the surface roughness is lower.
Reliability analysis of chain tool magazine based on improved FMECA
Authors: Lin Chaohui , Wang Manxin , Zheng Wenbo , Zhu Jianguo , Xia Kangjun 
Published: June 2024

Abstract
The chain tool magazine is the core component of the machining center, and its reliability is a key factor affecting the reliability of the machining center. Aiming at the reliability problems in using chain tool magazines, an improved FMECA reliability analysis method based on expert scoring information is proposed. Regarding risk analysis, cosine similarity is used to screen and eliminate inexperienced experts, and experts are considered. Occupation and duration information improves the credibility of the score output. The expert group score volatility is used to construct a subsystem reliability score correction factor, which is used to improve the consistency of the subsystem risk analysis results. It can guide the chain tool magazine in the improvement design stage. It provides important references for reliability allocation, fault warning, and maintenance during use.
Application of multinomial logistic regression toward adaptive reuse of pre-war shophouses
Authors: Ebas N A , Mohd Abdullah M S , Shafi M A , Rusiman M S 
Published: June 2024

Abstract
Pre-war shophouses are among the national heritage buildings that require conservation efforts, among others through adaptive reuse. Adaptive reuse of building assets is considered to be a sustainable way of bypassing the wasteful processes of demolition and reconstruction. However, adaptive reuse is not an easy decision because there are many factors affecting it. Therefore, the criteria for adaptive reuse need to be considered before choosing the potential adaptive reuse. There are six broad aspects to the criteria of adaptive reuse, which are economic, environment, social, architecture, technology, and legislative. A questionnaire survey among five (5) different backgrounds of respondents, also known as stakeholder, consists of a town planner from local authorities, a valuer from the valuation and property service department (JPPH), architects, researchers, and building owners to achieve the objectives. From the analysis, three (3) potential new uses, which are new shophouses, restaurants and hotels are identified as very suitable alternatives and represent an independent variable. This paper aims to identify the relationship between the decision made by stakeholders and the potential alternative adaptive reuse.
Small field measurements using electronic portal imaging device
Authors: Sait A Aziz , Yoganathan SA , Jones Glenn W , Patel Tusar , Rastogi Nikhil , Pandey SP , Mani Sunil , Boopathy Raghavendiran 
Published: June 2024

Abstract

Purpose/Objective. Small-field measurement poses challenges. Although many high-resolution detectors are commercially available, the EPID for small-field dosimetry remains underexplored. This study aimed to evaluate the performance of EPID for small-field measurements and to derive tailored correction factors for precise small-field dosimetry verification. Material/Methods. Six high-resolution radiation detectors, including W2 and W1 plastic scintillators, Edge-detector, microSilicon, microDiamond and EPID were utilized. The output factors, depth doses and profiles, were measured for various beam energies (6 MV-FF, 6 MV-FFF, 10 MV-FF, and 10 MV-FFF) and field sizes (10 × 10 cm2, 5 × 5 cm2, 4 × 4 cm2, 3 × 3 cm2, 2 × 2 cm2, 1 × 1 cm2, 0.5 × 0.5 cm2) using a Varian Truebeam linear accelerator. During measurements, acrylic plates of appropriate depth were placed on the EPID, while a 3D water tank was used with five-point detectors. EPID measured data were compared with W2 plastic scintillator and measurements from other high-resolution detectors. The analysis included percentage deviations in output factors, differences in percentage for PDD and for the profiles, FWHM, maximum difference in the flat region, penumbra, and 1D gamma were analyzed. The output factor and depth dose ratios were fitted using exponential functions and fractional polynomial fitting in STATA 16.2, with W2 scintillator as reference, and corresponding formulae were obtained. The established correction factors were validated using two Truebeam machines. Results. When comparing EPID and W2-PSD across all field-sizes and energies, the deviation for output factors ranged from 1% to 15%. Depth doses, the percentage difference beyond dmax ranged from 1% to 19%. For profiles, maximum of 4% was observed in the 100%–80% region. The correction factor formulae were validated with two independent EPIDs and closely matched within 3%. Conclusion. EPID can effectively serve as small-field dosimetry verification tool with appropriate correction factors.
Port Chaplaincy and the Wider Community
Authors: Sampson Helen , Turgo Nelson , Cadge Wendy , Gilliat-Ray Sophie 
Published: June 2024

AbstractChapter 6 considers the relationship between port chaplains, seafarers’ centres, and wider society. It describes the strong connections that can exist between port chaplains, seafarers’ centres, local churches, and community groups and the role of these connections in fundraising and providing gifts to seafarers. The chapter also describes the ways in which seafarers’ centres and port chaplaincy are supported by a variety of national organizations and community groups and concludes that it is important for chaplains to foster and maintain both their national and local connections with small and large-scale groups and with appropriate networks in order to support their work.
Piperacillin/Tazobactam Susceptibility Test Interpretive Criteria for Enterobacterales: Recommendations From the United States Committee on Antimicrobial Susceptibility Testing
Authors: Lodise Thomas P , Bhavnani Sujata M , Ambrose Paul G , Sader Helio S , Andes David , Pogue Jason M 
Published: June 2024

Abstract
The in vitro susceptibility testing interpretive criteria (STIC) for piperacillin/tazobactam (TZP) against Enterobacterales were recently updated by the US Food and Drug Administration, Clinical and Laboratory Standards Institute, and European Committee on Antimicrobial Susceptibility Testing. The United States Committee on Antimicrobial Susceptibility Testing (USCAST) also recently reviewed TZP STIC for Enterobacterales and arrived at different STIC for Enterobacterales. Here, we explain our recommendations and rationale behind them. Based on our review of the available data, USCAST does not recommend TZP STIC for certain Enterobacterales species that have a moderate to high likelihood of clinically significant AmpC production (Enterobacter cloacae, Citrobacter freundii, and Klebsiella aerogenes only) or for third-generation cephalosporin-nonsusceptible Enterobacterales. USCAST recommends a TZP susceptibility breakpoint of ≤ 16/4 mg/L for third-generation cephalosporin-susceptible Enterobacterales and only endorses the use of extended infusion TZP regimens for patients with infections due to these pathogens.