bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on digital soft start method of boost DC-DC switching power supply
Authors: Li Mengli , Guo Zhongjie , Qiu Ziyi , Shi Hao 
Published: January 2023

Abstract
Due to the progress of science and technology and the rapid development of the economy, human performance requirements for electronic products are getting higher and higher. Therefore, it is necessary to study a Boost-type DC-DC converter with high conversion efficiency, miniaturization, strong stability, and fast start speed. Currently, there are many ways to solve the DC-DC switching power supply problem. By analyzing the switching power supply, an efficient digital soft start method for boosting DC-DC switching power supply. This method adopts programmable digital technology. By precharging the output capacitor with the multiplexed substrate switching circuit, the output current rises steadily, and the soft start effect of the switching power supply is achieved. Based on the 0.18um BCD process, the test shows that when the input voltage is 3.7 V, the output voltage is 4.6 V, and the duty ratio is 20%, the soft start time is 210 us when the PVT changes and the steady rise of the output voltage does not produce the surge current phenomenon. Through theoretical analysis and experimental verification, the proposed method has the obvious advantages of simple structure, strong stability, low power consumption, and fast starting speed.
A Divide and Conquer Strategy to Deadlock Prevention in AMS with a Multitype of Resources using Resource Petri Nets
Authors: Yuan Hongpeng 
Published: January 2023

Abstract
The divide and conquer strategy in this paper is used to investigate the deadlock prevention of the AMS modeled by Resource-oriented Petri net when multitype resources are introduced. Based on the production process circuits, the plant ROPN model is divided into an idle subnet, an autonomous subnet, and some independent topologies. By adding liveness enforcing controllers to each topology, deadlock-free AMS can be achieved. It is shown that if the ROPN satisfies the separation condition, the computational effort of the controller will be greatly reduced. The proposed method is illustrated with the large AMS example.
Simulation and Experiment Research on Abrasive Wear of the Ship Mechanical Seal
Authors: Jin Yong , Ouyang Wu , Liu Zihao , Zhou Jianhui 
Published: January 2023

Abstract
The wear of friction pair resulting from seawater particles will inevitably bring marine tail shaft mechanical seal in the process of work, and abrasive wear will increase the static ring wear, resulting in the leakage of the mechanical seal. In this paper, through finite element simulation analysis of abrasive wear with different particle sizes and abrasive wear tests under different static ring materials, it is concluded that larger abrasive particle sizes will increase the deformation and residual stress on the surface of static ring materials, thus increasing the amount of wear, and the surface of softer static ring materials will be more serious. Also, if the particle size is too large, the particle concentration of the friction surface will decrease, and the wear will decrease.
Implicit Lyapunov Function-based Formation Control for Heterogeneous Vehicular Platoons with Time Delays
Authors: Chen Xiyan , Zheng Xinlei , Zhai Chunjie , Chen Chuqiao , Zimenko Konstantin A. , Wang Hongkui , Yin Haibing , Yan Chenggang 
Published: January 2023

Abstract
In order to lower the drivers’ driving pressure and improve traffic efficiency, academic and industrial interest in the cooperative adaptive cruise control (CACC) system has been substantial. In this research, we use the Implicit Lyapunov Function (ILF) technique to develop a switching controller for HVPs with temporal delays. The constant time headway strategy is utilized to construct the HVPs error model first. Then, the implicit Lyapunov function is used to develop the switching controller. Finally, the conditions of internal stability and string stability are obtained. The suggested switching controller has been shown to maintain internal and string stability in simulations involving heterogeneous vehicle platoons.
Principle and Experimental Study of Flow Noise Reduction for Underwater Vehicle Hull-Mounted Sonar
Authors: Fu Renqi , Shen Wenmiao , Hou Jue , Lou Wanxiang 
Published: January 2023

Abstract
When the underwater vehicle is sailing at high speed, the noise of flow becomes one of the principal background noises of the hull-mounted sonar, and suppressing the flow noise is an important way to further develop the detection execution of the hull-mounted sonar. In this paper, by establishing a physical model for the analysis of flow noise, The theoretical calculation of the fluctuating level of noise acquired by a plane element sensor imbedded in an rubbery layer is performed, and the impact of different wave-number filter elements such as sensor receiving area and rubbery layer on reducing turbulent noise is discussed, and then, the effectiveness of the flow noise reduction is verified through the measurement in a large-scale flow noise test tunnel.
Application of Adaptive Integral Robust Controller in Laser Galvanometer Motor
Authors: Li Guo-wang , Huang Shi-hao , Cai Xinjian 
Published: January 2023

Abstract
High-speed motion control of the galvanometer has become a very important part of laser processing. Due to the parameter uncertainty of the galvanometer itself, non-linearity can affect the friction compensation effect. In this paper, we propose to reduce the steady-state tracking error of the galvanometer system by means of an integral control term, while estimating the friction behavior using a nonlinear modified LuGre observer. Then an adaptive integral robust control scheme is used to eliminate the effects of nonlinear friction and external disturbances. And the stability of the galvanometer system is proved by the Lyapunov theorem. Simulation verification by MATLAB shows that the control scheme proposed in this paper can accurately follow the system commands. And the controller can effectively suppress the effects of unknown disturbances and parameter uncertainties compared with traditional control strategies. The simulation results show that the proposed control scheme significantly improves the response speed and tracking accuracy of the galvanometer system.
Bolts looseness detection in construction machinery
Authors: Song Yancheng , Liu Guangjun , Wang Yunfei 
Published: January 2023

Abstract
Bolt connections have increasingly wide applications in the mechanical industry, such as civil construction, construction machinery, etc. However, along with the vibration of the mechanical operation, bolt looseness is unavoidable and thus can lead to severe consequences. Therefore, the detection of loose bolts deserves an in-depth study. However, conventional bolt looseness detection techniques require a lot of time and labor, and direct contact sensor-based detection techniques are sensitive to interference from the surroundings. To tackle these challenges mentioned above, this work proposes a vision-based bolt looseness detection method, with the advantages of low cost, easy deployment, and non-contact. Specifically, an innovative attention mechanism is introduced into the Yolov4 framework to improve the accuracy and speed of bolt detection. Each bolt image is cropped by the recognition result of the detector, then the bolt contour is extracted by edge detection, and the bolt is determined to be loose or not based on the angle of bolt rotation. Comprehensive experiments in real-world settings verify the effectiveness and efficiency of the proposed method.
Study on the detection method of HDPE electro-fusion welding defect based on X-ray technology
Authors: Li Qiang , Li Weihan , Lu Qi , Li Yanfeng , Yang Tao 
Published: January 2023

Abstract
Electro-fusion welding is a common method for high-density polyethylene (HDPE) pipes. It has a high degree of automation and mature technology. However, during the welding process, various buried defects are easily generated. In this paper, HDPE pipes with welding defects were processed, and X-ray technology was used to detect the defects. The results show that: The X-ray detection technology is sensitive to the defects of sockets and ultralight clay-filled holes. But it is difficult to distinguish the size of the holes. Unfilled holes are partially fused during the welding process, which makes them difficult to detect. In addition, the defects of cold-welding and unscratched oxide skin cannot be detected.
Design and Simulation of a New Type of Speed-ratio Bladeless Supercharger Mechanism
Authors: Zhao Jie , Wang Zhicheng , Zhu Mengfan 
Published: January 2023

Abstract
Aiming at the problems of complex machining and impeller structural strength of traditional centrifugal compressors, a new speed-ratio bladeless supercharging mechanism is proposed. The results show that the system pressure of the new structure increases with the increase of the rotating speed of the disk; while the maximum pressure of the outer cavity and the maximum pressure of the system change in a curve with the difference of the disk wall clearance, the diameter of the disk and the number of pipes in the disk. Based on the results of theoretical and simulation analysis, a bladeless pressurized structure test platform was established. The test results show that the working medium pressurization measured at the outlet of the mechanism is 0.1Mpa, and the experimental results have a high degree of agreement with the theoretical analysis.
Simulation research on hydrodynamic performance of wave glider airfoil
Authors: Wang Ganlin , Zhu Liucun , Wan Hong , Wang Jiyue , Deng Haofeng , He Congwei 
Published: January 2023

Abstract
To improve the wave energy utilization rate of the wave glider as the research goal, research on the improvement of the hydrodynamic performance of the airfoil of the wave glider was carried out. First, we extract the bionic airfoil A and the standard airfoil C and draw the design airfoil B and the regular airfoil D. Secondly, using ANSYS Fluent, the hydrodynamic performance of the four airfoils under different inflow velocities and angles of attack is studied. Finally, data analysis shows that under the same attack angle, the lift coefficient, drag coefficient, and lift-drag ratio of the airfoil are not affected by the incoming flow velocity. Under the same incoming flow velocity, when the attack angle is 5°-13°, the bionic wing Type A is slightly better than the design airfoil B, obviously better than the standard airfoil C and regular airfoil D. Considering the hydrodynamic performance and material cost, it can be seen that the B airfoil is the optimal airfoil in this study. The comparative analysis of four airfoils provides a research basis for improving the wave energy utilization rate of the wave glider.
Bearing Fault Diagnosis Based on Prime Mean Spectral Segmentation Kurtogram
Authors: Dai Bing , Peng Yingjie , Lin Ning , Wang Peng 
Published: January 2023

Abstract
The spectrum-based fault feature extraction method for industrial equipment can avoid the problems of modal aliasing and end effects caused by mode decomposition in the time domain. This paper proposes a kurtogram constructed based on prime mean spectral segmentation. The preset framework realizes fast spectral segmentation, and the multivariate segmentation mode provides a more reasonable distribution of center frequency and bandwidth. The precise location and diagnosis of faults can be achieved by scanning shocks in each frequency band by spectral negentropy. Simulation signals and bearing fault experimental signals verify the performance of the algorithm.
Design of an autonomous navigation system for emergency disposal robots at radioactive waste sites under extreme climatic conditions
Authors: Peng Tianlin , Tang Dewen , Wu Jianing 
Published: January 2023

Abstract
There are many factors of environmental hazards that endanger the lives of personnel at radioactive waste sites after sudden extreme weather disasters, and the use of robotic substitutes can effectively safeguard the lives of personnel. For the situation where the environmental information of radioactive waste sites is unknown and there are many variables, an autonomous navigation system of emergency disposal robots with strong resilience and stability is designed. First, an algorithm based on the Rao-Blackwellized particle filtering theory is used in the autonomous navigation system to achieve more accurate robot positioning and map building through four processes: prediction, correction, resampling, and map building. Second, the traditional path planning algorithm combined with road information is added to Hopfield neural network to achieve deep analysis of complex road conditions. Finally, the intelligent voice interaction function is added to the navigation system to realize the robot’s interaction and real-time monitoring and feedback. The experimental results show that the emergency disposal robot has high accuracy in positioning, navigation, obstacle avoidance, etc., can respond quickly in unexpected situations and can carry out effective voice interaction.
Research on the automatic release function of electronic handover orders in distribution networks based on RPA
Authors: Bian Qiaoyan , Huang Di , Luo Shaojie , Zheng Weiyan , Yan Xingping 
Published: January 2023

Abstract
RPA is a new type of artificial intelligence virtual process automation robot. After several years of development, it has been widely used in various fields that need process automation. Studying the application of process automation in the power industry can solve mechanical and repetitive work problems by replacing the repetitive tasks and work processes performed manually with digital means. This paper introduces the Research and Development contents and specific process of an automatic release tool of electronic handover orders for distribution networks based on RPA, which can simulate the standardization of manual work process by pre-set program operation instructions, to speed up business process flow and reduce human investment.
A predictive Algorithm for Boost PFC Operating in Mixed Conduction Mode
Authors: Niu Junhao , Miao Hongtang 
Published: January 2023

Abstract
The traditional PFC control adopts the PI algorithm of the double-loop structure, but the PI parameter designed at this time is aimed at the inductor current continuous mode (CCM). When the PFC enters a heavy or light load, the converter inevitably enters the inductor current discontinuous mode (DCM). If the control parameters of CCM are still used at this time, the system may become unstable and reduce load response speed. Therefore, an optimized predictive current control is proposed, which calculates the duty cycle in CCM and DCM separately in advance, and then adopts the corresponding optimal duty cycle according to the detected inductor current conduction mode. With this algorithm, the PFC can operate in mixed conduction mode. It has a wider load range and faster load response speed than PI. Finally, through PLECS, the algorithm is verified by simulation.
Research on Real-Time Data Transmission and Feature Analysis Technology of Smart Tool Holder
Authors: Yan Jie , Huang Yigong , Song Lei 
Published: January 2023

Abstract
Cutting force, vibration, and cutting temperature are the significant characteristics of the cutting process for real-time monitoring and optimization. Smart tool holder technology is one of the key technologies to effectively monitor the cutting process. In order to realize real-time monitoring of the cutting process, a data transmission and processing technology based on the smart tool holder is proposed. First, a data transmission scheme based on socket communication technology is developed. Then, a data transmission format based on Modbus protocol and BCD code is proposed. Finally, the feature analysis technology of real-time data is discussed for the requirements of real-time control and optimization of process parameters. The proposed technology is conducive to improving the data processing efficiency of the data transmission process of the smart tool holder and is of great significance to the standardization of data transmission based on the smart tool holder.
Research on robotic end positioning based on fuzzy PID control
Authors: Liu Yunzhong , Jiang Hong , Zhang Xiangfeng 
Published: January 2023

Abstract
The existing traditional proportional-integral-derivative (PID) control robot has low-end positioning accuracy, which cannot meet the needs of accurately placing the molding die in the current automatic coal pen production process. To address this problem, this paper proposes a fuzzy strategy PID control method based on fuzzy strategy, aiming to improve the accuracy and robustness of the system when the manipulator grasps the mounding mold. Firstly, a manipulator motor control model is established to derive the parameters of the manipulator control system; secondly, the fuzzy control strategy is applied to adjust the PID control parameters in real time to improve the dynamic stability of the system. Finally, the control system is simulated, and field experiments are conducted to verify the accuracy of robotic end positioning. The experimental results show that the fuzzy PID control system has a shorter response time, better anti-interference ability, and better stability than the traditional PID control and achieves the accuracy requirements of coal pen automation production.
Node Importance Recognition Algorithm Based on the Correlation Degree Transmission Contribution Matrix
Authors: Lin Shengnan , Li Shuai , Su Yang 
Published: January 2023

Abstract
Based on the importance identification of nodes in a directed weighted network, a node importance recognition algorithm based on the correlation transmission contribution matrix is proposed. The proposed algorithm comprehensively considers the transmission ability of nodes, the correlation degree between nodes and adjacent nodes or indirectly related nodes, and the contribution degree between nodes to construct the correlation degree transmission contribution matrix. This paper combined the algorithm with the node efficiency of the local range of node importance and finally combined it with the global importance index intermediary number centrality to comprehensively evaluate the importance of nodes in the network. For the nodes with only incoming edges in the network, the product of the node mediator centrality and the correlation degree contribution matrix is calculated as the node importance. For nodes with only outgoing edges in the network, the product of node mediator centrality, degree value and node self-efficiency is calculated as node importance. Conducting experimental simulation analysis of the ARPA directed-weighted networks shows that the deliberate attack based on the algorithm results hits the network more obviously, which further proves the effectiveness and accuracy of the proposed algorithm.
Operational scenario of first high luminosity LHC run
Authors: Tomás R , Arduini G , Baudrenghien P , Brüning O , Bruce R , Buffat X , Calaga R , Cerutti F , Maria R De , Dilly J , Efthymiopoulos I , Giovannozzi M , Hermes P D , Iadarola G , Jones R , Kostoglou S , Lindström B , Maclean E H , Métral E , Mounet N , Papaphilippou Y , Persson T H B , Pugnat T , Redaelli S , Sterbini G , Timko H , Veken F Van der , Wenninger J , Zerlauth M 
Published: January 2023

Abstract
A new scenario for the first operational run of the High Luminoisty LHC (HL–LHC) era (Run 4) has recently been developed to accommodate a period of performance ramp-up to achieve an annual integrated luminosity close to the nominal HL–LHC design target. The operational scenario in terms of beam parameters and machine settings, as well as the different phases to reach optimal performance, are described here along with the impact of potential delays to key hardware components.
Summary of numerical noise studies for Electron-Ion Collider strong-strong beam-beam simulation
Authors: Luo Y , Xu D , Hao Y , Qiang J , Berg J S , Blaskiewicz M , Fischer W , Gamage R , Gu X , Huang H , Hoffstaetter G , Kewisch J , Lovelace H , Montag C , Morozov V , Nisson E , Peggs S , Ptitsyn V , Satogata T , Willeke F 
Published: January 2023

Abstract
The Electron-Ion Collider (EIC) presently under construction at Brookhaven National Laboratory will collide polarized high energy electron beams with hadron beams with design luminosities up to 1 × 1034cm−2s−1 in center mass energy range of 20-140 GeV. We studied the planned electron-proton collisions using a Particle-In-Cell (PIC) based Poisson solver in strong-strong beam-beam simulation. We observed a much larger proton emittance growth rate than in weak-strong simulation. To understand the numerical noise and its impact on strong-strong simulation results, we carried out extensive studies to identify all possible causes for artificial emittance growth and quantify their contributions. In this article, we summarize our study activities and findings. This work will help us better understand the simulated emittance growth and the limits of the PIC based strong-strong beam-beam simulation.
Detector solenoid compensation in the EIC electron storage ring
Authors: Xu D , Luo Y , Berg J Scott , Lovelace H , Tepikian S , Wu Q , Xiao B , Avronsart J , Witte H , Blaskiewicz M , Montag C , Willeke F , Gamage B R , Morozov V , Hao Y 
Published: January 2023

Abstract
The Electron-Ion Collider (EIC) uses crab cavities to restore the geometrical luminosity loss associated with the large crossing angle. Due to space limitations, the detector solenoid cannot be compensated locally. This paper presents the lattice design to compensate the detector solenoid effects without interfering with the crab cavities. Skew quadrupoles are employed to avoid additional crab cavities. The correction scheme is checked by beam-beam simulation.
Field enhanced compact S-band gun employing a pin cathode
Authors: Bazrafshan R , Fakhari M , Rohwer T , Flöttmann K , Matlis N H , Kärtner F X 
Published: January 2023

Abstract
S-band RF-guns are highly developed for production of low emittance relativistic electron bunches, but need powerful klystrons for driving. Here, we present the design and first experimental tests of a compact S-band gun, which can accelerate electrons up to 180 keV powered by only 10 kW from a compact rack-mountable solid-state amplifier. A pin-cathode is used to enhance the RF electric field on the cathode up to 100 MV/m as in large-scale S-band guns. An electron bunch is generated through photoemission from a flat copper surface on the pin ex-cited by a UV laser pulse followed by a focussing solenoid producing a low emittance bunch with 0.1 mm mrad transverse emittance for up to 100 fC bunch charge. We are currently in the conditioning phase of the gun and first experiments show good agreement with simulations. The compact gun will serve three purposes: (i) it can be used directly for ultrafast electron diffraction; (ii) as an injector into a THz booster producing 0.3 MeV to 2 MeV electron bunches for ultrafast electron diffraction; (iii) The system in (ii) serves as an injector into a THz linear accelerator producing a 20 MeV beam for the AXSIS X-ray source project.