bluuebunny/crossref_metadata_2025_split huggingface dataset:
Composite Graphite Bipolar Plates Under Different Working Conditions
Authors: Yue Luo , Zhang Gaoqun , Liu Xiaotong , Deng Zhanfeng , Xu Guizhi , Chang Liang , Huang Yao , Hu Xiao , Song Jie 
Published: August 2023

Abstract
This study uses the molding method to prepare composite graphite bipolar plates to improve the corrosion resistance and electrical conductivity of fuel cell bipolar plates, improve the conversion efficiency and service life, and test their environmental adaptability under different working conditions. In this experiment, the fuel cell test system (850e) is used to test the voltage change curve and power density change curve of the proton exchange membrane fuel cell (PEMFC). Under 200 KPa, the voltage of the fuel cell at a current density of 1000 mA/cm2 is 0.719 V. The power density reaches the maximum at 1540 mA/cm2 current density, which is 911 mW/cm 2. The radii of the three curves from 0.1 A/cm2 to 0.5 A/cm2 decrease with the increase of current density. This indicates that at the beginning, the greater the current density is, the smaller the mass transfer resistance inside the fuel cell is, and the smaller the electron transfer resistance during the electrochemical reaction is. However, when the current density increases to 1 A/cm2, the power density of the fuel cell increases slowly. In the 12-hour constant current density test, it is found that the fuel cell voltage dropped from 0.641 V to 0.611 V, and the rate of decline was 2.5 mV/h, proving that the overall performance of the fuel cell is relatively stable. The graphite bipolar plate prepared by the molding method has good adaptability under different working conditions, and the comprehensive performance is stable under long-term testing.
Preparation and Performance Study of Low Surface Energy Anti-Icing Coating for Transmission Lines
Authors: Zuo Yue , Cai Yuan , Li Xiangyu 
Published: August 2023

Abstract
A low surface energy transmission line coating material is prepared and analyzed in this paper. Firstly, the super hydrophobic coating was developed and lubricated to obtain the super slip surface coating. Then, the resulting anti-ice coating was subjected to anti-ice performance tests and ice adhesion strength tests, respectively. Finally, the obtained results were analyzed. The results show that the developed anti-ice coating can greatly reduce the amount of ice covering, reduce the ice side force, and solve the problem of icing on transmission lines at low temperatures.
The Viscosity of Na2O-B2O3-CaO-SiO2-Al2O3 Slags
Authors: Guo Junli , Hu Qiang , Zou Jin , Lu Deping 
Published: August 2023

Abstract
The molding powder is an important supplement material in the continuous casting process, which plays a decisive role in the condition of continuous casting and the surface quality of the slab. The viscosity of the Na2O-B2O3-CaO-SiO2-Al2O3 slag system was studied by using the internal cylinder rotation method, and the viscosity data within the range of experimental slag composition were analyzed. The result shows that the viscosity of slag decreases gradually with the increase of borax (Na2O·2B2O3) content, where the content of O2- in the slag increases and the polymerization degree of the network structure decreases in the slag. When the Al2O3 contents increase, the amount of free oxygen decreases in the slag, which increases the degree of polymerization of the slag structure and results in the viscosity increasing. The calculation result of the prediction equation for viscosity has a small deviation.
Effect of starch pore formers with different particle sizes on cordierite porous ceramics
Authors: Nie Da , Wang Hao , Wang Jianju , Peng Yiyuan , Luo Jun , Zhang Haibo , Chen Qinghua 
Published: August 2023

Abstract
Particulate matter (PM) from vehicle exhaust can be effectively removed by cordierite particulate filters. The pore size and distribution of the cordierite particulate filter are very important to PM trapping efficiency. The main factors affecting the pore formation of porous cordierite ceramics are the grain size of the feedstock, the size of pore-forming agent particles, the sintering process, etc. Talc, kaolin, silicon oxide, alumina, and boehmite were used as the raw materials, and the effects of starch pore formers of different particle sizes on the CTE, XRD, microstructure, pore size distribution, and mechanical strength of honeycomb cordierite were investigated.
Natural vibration of elastic metamaterial beam under arbitrary elastic boundary conditions
Authors: Shu Haisheng , Wu Zhiguang 
Published: August 2023

Abstract
Elastic metamaterial (EM) is a kind of new composite material/structure that provides a new feasible way of vibration control in many scenarios. Although some analytical means for solving the vibration behavior of EM components with simple shapes and classic boundary conditions (BCs) have been presented, the analyses of those with complex shapes or BCs that are common in reality remain to be studied further. In this paper, the natural vibration problem of a typical EM beam under arbitrary elastic boundary conditions (EBC) is investigated by using the effective medium theory (EMT) and the Rayleigh-Ritz method. The inherent correlations between the EM beam and corresponding modified matrix beam together with the modified static equivalent beam are disclosed for their modal behaviors. The extraordinary natural vibration properties of the EM beam under arbitrary EBC are revealed and some common features are concluded. This work may provide a useful reference for further investigations of many other similar EM structures.
Unmanned aerial vehicle passive positioning technology based on cross-location and target splitting
Authors: Wu Huiyuan , Wang Luning , Yang Huibing , Chen Jinghan , Wang Boxuan , Zhang Xinyu 
Published: August 2023

Abstract
In order to ensure that the UAV fleet can maintain maximum electromagnetic silence and minimise the emission of UAV electromagnetic signals during formation flight, a theoretical method of pure azimuth passive positioning can be used to optimise their relative positions. This paper analyses different formation situations of UAVs and presents the best solution for pure azimuth passive positioning of UAVs in formation flight and the corresponding positions. The paper first establishes polar coordinates based on known orientation information. It uses the sine theorem for triangles in the plane and the joint cubic equations to obtain the final result. It then uses triangulation to verify the accuracy of the specific location of the UAV by solving a least squares problem. Using the idea of cross-location, two intersecting trajectories are constructed and their intersection is used to improve the specific position of the UAV. Due to the bias in the position of the location of the signal sent by the UAV, this paper uses of the idea of target segmentation to split the target into multiple sub-targets and implement them separately. This is done in order to avoid the need for more UAVs to send their signal while adjusting the UAV position, making the Drones evenly spaced around a circumference.
Research on Safety Operation and Maintenance Management and Health Status Assessment for Lithium Battery Energy Storage System
Authors: Mao Zhibin , Cai Jian , Zhou Kai , Wang Weili , Luo Dan , Tang Guizhong 
Published: August 2023

Abstract
The safe operation and maintenance of lithium batteries not only needs to monitor the working status of lithium batteries timely and accurately, but also needs to evaluate its health status and automatically switch the backup battery when safety hazards are found. However, research on the safe operation and maintenance of lithium batteries is still lacking. In light of this, this paper constructs a safe operation and maintenance mechanism by monitoring the voltage and surface temperature of the lithium battery. In addition, a novel online health assessment model based on GRU-CNN is proposed to find out the potential safety hazards of lithium batteries timely. The working voltage, current and ambient temperature are used as the input features of the model to predict the degradation of lithium batteries in advance. In addition, a security operation and maintenance controller is designed to quickly switch the backup battery pack when a lithium battery pack appears to have performance degradation or security risks. The system realizes the real-time monitoring of the safe operation of lithium batteries and the rapid assessment of health status, providing technical guarantees for the reliable, stable, and safe operation of the lithium battery system. The experimental comparison verified that the proposed assessment model of the status of health (SOH for short) has less prediction error.
Optimization and Design of Circuit Parameters of Aircraft Engine Speed Acquisition System
Authors: Wang Guang , Li Xiangdong , Hu Mingliang 
Published: August 2023

Abstract
Rotating speed is an important parameter to reflect the running condition of the engine, and its real-time measurement and accuracy are directly related to the control accuracy of the engine. In this paper, according to the actual demand for the measurement of engine speed, a system architecture and a hardware design scheme of frequency acquisition circuits are proposed. The overall simulation is carried out by Saber. According to technical requirements, the transfer function of the band-pass filter network and the hysteresis threshold are analyzed and calculated theoretically. By adjusting the RC value of the low-pass filter and introducing the reference voltage to reduce the hysteresis threshold, the acquisition failure caused by the low output excitation when the engine is running at low speed is solved. The high-precision acquisition in the full speed range is realized, with ideal simulation.
Design of Airborne Radar Servo Control System
Authors: Wang Hong 
Published: August 2023

Abstract
The brushless DC motor is driven by a square wave. Compared with the sinusoidal synchronous motor, the control is simple. The airborne radar servo control system described in this paper uses a brushless DC motor drive, PWM control, and angular position. The speed detection feedback loop is composed of a brushless resolver and a resolver for digital converters. The control system adopts the current, speed, and position closed-loop design. The design simulation is carried out by using MATLAB/Simulink to guide the control system design. The system design uses PID incremental control and an integral separation control algorithm. Through the rational design of software and hardware, the airborne radar servo system has achieved high dynamic and static performance, which meets the performance requirements of the airborne radar system.
Machine learning prediction models for AFM virtual imaging system
Authors: Yang Jinxin , Xu Hongmei , Liu Xuwei , Yuan Lixin 
Published: August 2023

Abstract
Nowadays, virtual laboratories are widely used in education and training in universities. Such virtual labs do gain some effect in teaching, assisting students to be familiar with the experimental steps. However, these systems tend to be relatively simple. There is room for improvement in helping students understand the experimental principles. This is particularly evident in the teaching of atomic force microscopy. In order to overcome these shortcomings of the AFM virtual laboratory, we present a virtual AFM imaging system with a lower-resolution contact mode. We restore the core principle of the beam deflection method in AFM using the unity3D development platform. Several machine learning techniques are employed to build an imaging prediction model. Since no public dataset is available for the task of prediction of topographical maps, we create the first dataset of grating samples for prediction. The result indicates that the proposed topographical map prediction model with the best performance is CatBoost. We prove the feasibility of building a virtual AFM imaging system with the ability to visualize internal structures and predict sample topographical maps. This work has important applications related to the 3D dynamic display of the AFM scanning and imaging process and user experience training. At the same time, it can help users get a preliminary understanding of the imaging effect of different types of experimental samples under AFM, providing a new idea for the construction of AFM virtual laboratories.
Adaptive back-stepping Control of Electro-hydraulic Servo system of Steam Turbine
Authors: Wang Shunjiang , Ling Zhaowei , Xu Ruichao , Zhou Guiping , Jin Yifang 
Published: August 2023

Abstract
The parameters such as oil density and bulk elastic modulus of hydraulic oil in steam turbine electro-hydraulic servo system vary with ambient temperature, pressure, and other factors, and there are unmodeled dynamics in the system, so obtaining a satisfactory following effect is a challenging task for the electro-hydraulic servo(EHS) system. According to the principle of force balance and flow continuity, the mathematical model of a bilateral oil intake motor is established in this paper. On this basis, a back-stepping controller is designed, and an adaptive method is used to estimate uncertain parameters and disturbances. The designed control system is simulated and verified, and compared with the RBF control system after parameter optimization. The results show that the controller designed in this paper has good tracking performance and adaptability to uncertain parameters and external load disturbances.
Design and application of copper chain removal device for TOBSPIN tobacco cutter
Authors: Xu Li , Fang Yubin , Xu Min , Sun Kelei , Lin Bin , Zhu Jun , Wu Yujie 
Published: August 2023

Abstract
In order to solve the difficulty in disassembling the copper chain of the TOBSPIN tobacco cutter, an automatic disassembly device was developed based on Solidworks mechanical simulation design software. Firstly, construct the overall structural model of the device by Solidworks. Then determining the feasibility of the equipment operation by the force analysis of the system. Lastly, the device can be automatically started and stopped by controlling PLC program. The results show that it takes 41.24 hours for manual disassembly per machine, and 11.18 hours to apply the automatic device, which reduces the working time by 72.9%. The device can provide technical support for improving the disassembly efficiency of the equipment and reducing operating intensity.
Resonance and sensing characteristics of quartz tuning fork for force sensor
Authors: Ding Yitian , Wang Jiahui 
Published: August 2023

Abstract
Quartz tuning fork (QTF) is often utilised for the design and manufacture of high-performance sensors, such as the force sensor for atomic force microscopy (AFM). In this study, the mechanical resonance and sensing characteristics of QTF with an additional mass on its prongs are studied by theoretical analysis and experiments. The results show that the position and size of additional mass on the QTF prong have an obvious influence on its resonance frequency and quality factor (Q-factor). The greater the mass of the additional component or the closer to the free end of the QTF prong is, the lower its resonance frequency and quality factor will become. Reducing the additional effective mass can significantly improve its quality factor, thus improving the sensing performance of the QTF sensor. This study can provide a quantitative reference for the design and optimisation of the QTF force sensor for AFM.
The Arrangement and Cross-sectional Shape of Cooling Fins on Train Brake Discs
Authors: Yu Hao , Tian Chun , Wang Guozhuang 
Published: August 2023

Abstract
Taking into account physical factors such as the wind effect of the brake disc pump, heat dissipation power, and temperature rise, the optimal cross-sectional shape and layout of the brake disc cooling fins are studied. The flow field distribution and pump-wind heat dissipation power ratio of four different cross-sectional shapes, namely circular, elliptical, square, and rhombic, are compared and analyzed. The flow characteristics, wind effect, and heat dissipation power of the cooling fins under two different layouts, namely crosswise and parallel layouts, are also analyzed. The research results show that the circular cooling fins have the optimal pump-wind loss and heat dissipation power, and the crosswise layout of cooling fins shows the best comprehensive performance. The performance analysis method of cooling fins obtained in this paper provides a reference for the optimization design of brake disc structures.
Electrochemical corrosion behaviour of rolled dual phase Mg-8Li-graphene composite
Authors: Kavimani V , Vignesh P , Kumar Navneet , Kumaran S 
Published: August 2023

Abstract
In this research, the effect of interrupted rolling on electrochemical corrosion behaviour of Mg-8Li-xGr composite is investigated. Graphene reinforced composite was developed by using stir casting route and rolled with different reductions in thickness of 50, 75 and 90%. Investigation on potentiodynamic polarization of rolled composite depicts that increase in reduction percentage increases the corrosion rate of the developed composite. Electrochemical impedance studies reveal that composite reduced at 50% thickness exhibits higher charge transfer resistance of 80 Ωcm2. Nyquist plot depicts occurrence of inductance loop that reveals occurrence of oxide layer breakage. Addition of graphene up to 0.4 wt% increase the corrosion resistance and further addition exhibits adverse effect in corrosion behaviour due to the galvanic effects. The occurrence of pitting corrosion is evidenced from corrosion surface morphology.
Hydrothermal synthesis of Zn-doped brookite TiO2 for enhanced visible-light-responsive photocatalytic performance
Authors: Zou Yunling , Yu Tao , Huang Xianshou , Li Yan , Guo Lingjue , Yan Huifeng , Zhou Juan , Wang Yu 
Published: August 2023

Abstract
Brookite TiO2 is considered as one of the excellent candidates in photo- or photo-/electro- chemical applications due to its unique crystalline structure and electronic properties. To achieve an enhanced visible-light-responsive brookite TiO2 photocatalyst, Zn-doped brookite TiO2 (ZBT) was in situ synthesized under hydrothermal conditions at 180 °C for 2 h in this research. X-ray diffraction (XRD) verified that the undoped sample was single-phase brookite TiO2, while the ZBT samples are mixtures of brookite and anatase because the incorporation of Zn caused brookite to anatase phase transformation. The average particle size of the ZBT samples was smaller than pure brookite TiO2 and decreased with the increase of Zn amount, indicating that Zn doping inhibited the growth of crystallite. ZBT samples exhibited better photocatalytic activity for the degradation of methylene blue (MB) than pure brookite TiO2 under visible light irradiation due to the effective separation of electrons and holes by Zn doping. Among the ZBT samples, the 5% ZBT sample exhibited the best photodegradation rate of MB (92.6%) under visible-light irradiation for 2 h, which was attributable to its small particle size (19.78 nm) and the large surface area (67.08 m−2 g−1).
Integration of Ag-CBRAM crossbars and Mott ReLU neurons for efficient implementation of deep neural networks in hardware
Authors: Shi Yuhan , Oh Sangheon , Park Jaeseoung , Valle Javier del , Salev Pavel , Schuller Ivan K , Kuzum Duygu 
Published: August 2023

Abstract
In-memory computing with emerging non-volatile memory devices (eNVMs) has shown promising results in accelerating matrix-vector multiplications. However, activation function calculations are still being implemented with general processors or large and complex neuron peripheral circuits. Here, we present the integration of Ag-based conductive bridge random access memory (Ag-CBRAM) crossbar arrays with Mott rectified linear unit (ReLU) activation neurons for scalable, energy and area-efficient hardware (HW) implementation of deep neural networks. We develop Ag-CBRAM devices that can achieve a high ON/OFF ratio and multi-level programmability. Compact and energy-efficient Mott ReLU neuron devices implementing ReLU activation function are directly connected to the columns of Ag-CBRAM crossbars to compute the output from the weighted sum current. We implement convolution filters and activations for VGG-16 using our integrated HW and demonstrate the successful generation of feature maps for CIFAR-10 images in HW. Our approach paves a new way toward building a highly compact and energy-efficient eNVMs-based in-memory computing system.
Theorising the Uncanny Adaptation through Hamlet
Authors: Bergan Mckenzie 
Published: August 2023

Abstract
Adaptations possess an uncanny quality, especially when those adaptations are built on tragic narratives. When audiences see the same characters relive the same plots in different contexts, what was once familiar becomes unfamiliar, and a kind of haunting is produced. Adaptations that move across mediums from stage to film to video games carry an especially prominent potential for uncanniness. Using adaptations of Hamlet and specifically the video game, Elsinore, to track this evolution reveals that the temporal ambiguity that the uncanny adaptation produces within a tragic narrative carries the potential to enact ethical aims, while also suggesting a way forward in thinking about that narrative’s future. By first defining the uncanny adaptation and examining Elsinore as a case study, this article explores the ethical potential that is made possible through the uncanny elements of tragic adaptation.
A bicentric cohort study comparing umbilical cord and neonatal blood samples for chemistry tests at birth
Authors: Calafatti Matteo , Gizzi Camilla , Simonelli Ilaria , Papa Fabrizio , Consigli Chiara , Sorrentino Elena , Haas Cristina , Massenzi Luca 
Published: August 2023

Abstract

Objectives
To compare umbilical cord and neonatal blood for chemistry tests upon admission to the neonatal intensive care unit (NICU).

Methods
We designed a prospective, bicentric cohort study enrolling newborns (n = 71) with a planned admission to the NICU. Paired samples of umbilical cord and infant’s blood were collected, analyzed, and compared. An intraclass correlation coefficient (ICC) was calculated for a repeatability analysis, and a Bland-Altman analysis was performed to assess the agreement between the 2 methods of sampling. The multivariable coefficient of determination (R2) was reported to quantify the degree of correlation between the methods of measurement.

Results
The degree of agreement between the 2 sampling methods for chemistry tests was fair to good for high-sensitivity C-reactive protein (ICC = 0.79 [95% CI, 0.67-0.87]), phosphorus (ICC = 0.83 [95% CI, 0.73-0.90]), and albumin (ICC = 0.76 [95% CI, 0.60-0.86]), while it was good to excellent for γ-glutamyl transpeptidase (ICC = 0.95 [95% CI, 0.88-0.98]) and procalcitonin (ICC = 0.90 [95% CI, 0.76-0.96]).

Conclusions
Umbilical cord blood is a reliable replacement source for multiple chemistry tests at birth. This sampling method has the potential to minimize the risk of transfusion-requiring anemia in newborns and its associated complications. Further studies are warranted to assess the efficacy of this strategy in improving neonatal outcomes.