bluuebunny/crossref_metadata_2025_split huggingface dataset:
GPU-Accelerated infrared signature analysis model based on the Reverse Monte Carlo method
Authors: Liu Xinyuan , Yang Qingzhen , Shi Yongqiang 
Published: December 2022

Abstract
High-fidelity scene simulations are now possible thanks to advancements in computer technology. A fast analysis model for target infrared signature was developed by using the Graphics Processor Unit (GPU) device. The Malkmus statistical narrow band model is used to calculate the gas band-averaged transmittance. Mie scattering theory is used to calculate the particle scattering parameters, and based on the assumption that particles scatter light independently, the albedo and phase functions of the participating media are determined. The Reverse Monte Carlo method (RMCM) is used to complete the radiative transfer. Finally, a GPU device is used to accelerate the ray tracing process and achieve fast calculation of radiation. The calculation results show that the fast analysis model with high accuracy, and compared to Central Processing Unit (CPU) serial programs, the computational performance is greatly improved, with an acceleration ratio of more than 60. The thread block size has a significant impact on the occupancy and acceleration ratio, and the highest computational performance is obtained with the thread block size of 128. The scattering will reduce the acceleration ratio of the fast analysis model, and the performance will be reduced as the particle mass flow rate increases.
Study on electrical conductivity of detonation products of aluminized explosives
Authors: Yao Baoxin , Cao Bing 
Published: December 2022

Abstract
Using the thermodynamic equilibrium constant method and JWL-Miller equation of state, based on the calculation of the thermodynamic parameters such as the composition, pressure, and explosion temperature of the detonation products of aluminized explosives in the Magnetocumulative generator, the Saha ionization equation, and gas conductivity calculation model are used to write Matlab code to calculate the electron density and conductivity of the detonation products of the magnetic flux compression generator. The temporal and spatial variation law of electron density and conductivity is revealed. The simulation shows that the thickness of the maximum conductivity layer in the detonation process is about 1 mm and moves at a uniform speed following the CJ surface. The maximum conductivity of HMX/Al (70/30) is 1.88e5 Ω−1·m−1, with an error of 6%, and the maximum conductivity of RA1 (HMX / DNAN / Al) is 2.7e4 Ω−1·m−1
Research on foreign object damage and grinding repair schemes of compressor blades
Authors: Daiand Hongfu Zuo Weijie 
Published: December 2022

Abstract
Foreign object damage (FOD) on compressor blades of aero-engines lowers the capacity of blades and poses a serious threat to civil aviation safety, so the repair of blades with FOD deserves more attention. The finite element model of the aero-engine compressor blade was established, and the finite element analysis was carried out on the damaged blades with FOD notches and the blades after grinding and repair. The natural frequencies of different types of blades and the global and local peak stress under rotating conditions were compared. It was confirmed that the stiffness of the repaired blades was acceptable, and the optimal grinding repair scheme was selected.
A yaw attitude determination method based on coarse sun sensor information for the GEO satellite
Authors: Yin Jing , Liu Jiang , Yang Fan 
Published: December 2022

Abstract
The coarse sun sensor is used to measure the satellite’s attitude relative to the sun. If the satellite can maintain the earth-pointing attitude by the high-precision sensor, the coarse sun sensor information can be used to determine the satellite’s yaw attitude, which is effective in coping with the short-term failure of the satellite’s yaw attitude sensor. This paper proposes a method to determine the yaw attitude of the satellite using the coarse sun sensor information. In view of the main factors affecting the accuracy of the coarse sun sensor, the measures to improve the yaw accuracy are proposed: the sensor calibration method based on historical data and effective measurement range selection. Simulation with satellite onboard data, the expected function can be achieved, and by correcting the measurement data, the yaw attitude accuracy can be significantly improved.
Research on factors affecting the assembly accuracy of deployable arms
Authors: Li Pengfei , Lu Ligang , Wu Dongbo , Liang Jiawei , Wang Hui , He Pengpeng 
Published: December 2022

AbstractA spacecraft deployable arm is one of the key components of spacecraft. The assembly accuracy of space deployable arms restricts the improvement of spacecraft performance. Therefore, it is important to analyze the factors influencing the assembly accuracy of deployable arms to optimize the assembly process. This paper studies the precision assembly of deployable arms, with a spacecraft deployable arm as the specific research object. In the study, the assembly process is modeled theoretically and analyzed by Finite Element Analysis. Finally, the assembly experiment of the deployable arm is carried out based on the research.
Fault analysis and troubleshooting of nitrogen supply system for a ship’s nitrogen generator
Authors: Chen Zuotian , He Xiaodong , Ge Quan , Zhou Yang 
Published: December 2022

Abstract
This paper introduces the working principle and system work flow of the marine nitrogen generator. Emphasis is laid on the air pretreatment subsystem, nitrogen membrane separation subsystem and automatic control system of the nitrogen generator. In view of the automatic alarm shutdown fault of a ship’s nitrogen generator in the course of operation, the reason is analyzed, and it is found that the refrigeration device fault of the nitrogen generator leads to the excessive air temperature before the film inlet group, thus causing the failure shutdown. Finally, the fault location and troubleshooting are carried out.
Structural optimization and fatigue life analysis of landing gear upper lock
Authors: Hou Dingqi , Li Guanghui , Zhu Yan , Wang Yu , Ma Xiaochen , Wang Lipeng , Qiao Jing , Zhao Jun 
Published: December 2022

Abstract
The upper lock is a key component of the landing gear system, and its fatigue life affects its service life and reliability. In this paper, the modal analysis, random vibration analysis, and fatigue life calculation are carried out for the upper lock. According to the analysis results, the upper lock structure is optimized, and the optimization scheme is proposed. The natural frequency, stress, and fatigue life are analyzed, and the scheme meets the design requirements. Finally, the optimized structure is verified to be reasonable and feasible through experiments.
Simulation research on transmission characteristics of double drum excitation governor
Authors: Gang Cheng , Donghua Song , Jianbing Chao , Chao Wang , Zhongsheng Cui 
Published: December 2022

Abstract
Aiming at the disadvantage that traditional permanent magnet governor needs an additional air gap adjusting mechanism, a double-barrel excitation speed adjusting device is proposed, which adjusts the air gap by adjusting current instead of the air gap. Due to the uncertainty of current speed regulation, the simulation design is analyzed. A structural model and key components of excitation speed regulation are designed. Structural characteristics and principles of the model are introduced. Due to the complexity of the multi-physical field, the finite element analysis method is used. Based on the three-dimensional moving eddy current field, the simulation model of the double-barrel excitation governor is established; the variation law and speed characteristics of the electromagnetic field in transient excitation governor are analyzed; the magnetic induction intensity cloud diagram, eddy current density vector diagram, and circumferential variation curve of air gap magnetic induction intensity are obtained, and the relationship between speed difference on output torque under different current is got. The results show that the output torque increases with the increase of excitation current. With the increase in slip ratio, it will first increase and then decrease. Its laws and conclusions can provide a novel method for further design and optimization of excitation governor.
Construction of High Dynamic Flight Closed-loop Simulation System
Authors: Liu Hengyi , Zou Guoji , Meng Bin 
Published: December 2022

Abstract
In this study, a high dynamic flight closed-loop simulation system was designed and based on the flight characteristics of flight combat systems (missiles, fighters, etc.), the real-time simulation of 6DoF (six degrees of freedom) flight parameters such as position, velocity, acceleration, and attitude of typical flight combat system models in high dynamic flight was implemented. The proposed system, together with the high dynamic Beidou RNSS signal simulator and automated test and evaluation device, forms the high dynamic positioning test platform of the flight simulation system and realizes the closed-loop simulation test and verification of the navigation device of the high dynamic flight combat system.
Research and Prospect of Wave maker Design and Wave making Application
Authors: Lin Xiangyang , Wang Xu , Li Kai , Liu Xia , Duan Derong 
Published: December 2022

Abstract
Wave energy is clean energy with huge development potential. At present, structural energy reform is an important issue in my country’s development. Therefore, the research on the application of wave energy can promote the structural reform of my country’s energy to a certain extent. This paper summarizes the history of wave simulation development and the current status of wave applications, and compares and analyzes wave-making by pushing plate-type wave machines, rocking plat-type wave machines, box-type wave machines, and combined wave-making according to different wave-making methods. Machine building characteristics. Combined with the application status of wave energy, the wave energy power generation is summarized, and the economic and technical status of wave energy power generation is described in detail. Finally, the development trend and application prospect of wave application are summarized.
Design and Simulation Study of Shipboard UAV Net Recovery Device
Authors: Wei Xiaoran , Wei Dingjiang , Sui Xianhui , Cao Liyuan , Su Qibin 
Published: December 2022

Abstract
Shipborne UAVs (Unmanned Aerial Vehicles) play an irreplaceable role in the future maritime war. Countries around the world have been studying and looking for a safe and economical way of shipborne recovery. In this paper, based on the technical scheme and performance characteristics of shipborne UAV net collision recovery, a multi-layer recovery net device is proposed for shipborne UAV recovery. Based on the motion model of the shipborne UAV, Simulink software was used to simulate the final guidance stage of the UAV. The results show that the multi-layer recovery net of the shipborne UAV can adapt to the error caused by ship rocking in the process, and make up for the tracking error and net collision error of UAV in 3D motion simulation. This device has a broad application prospect and has reference significance for comprehensively improving the recovery efficiency of UAVs.
G100S axial flow fan simulation comparison analysis
Authors: Li Zehao , Chen Ming , Yang Liusiyu , Liu Liming 
Published: December 2022

Abstract
This paper conducts a comparative simulation for different structural layout schemes of the new G100S axial flow fan, with the motor layout position and its supporting guide vane as the main modification direction, while the fan length and guide tongue angle are appropriately adjusted according to the motor position. CFD analysis and calculation are used to compare and study the performance of the axial-flow fan. The results show that the axial flow fan with rear motor, air outlet cone integration, and large angle guide tongue layout has greater wind speed, longer injection distance, more uniform distribution of outlet flow field traces, greater wind pressure at the air outlet, and faster flow stability convergence. This work will provide technical support for designing orthogonal experiments in the direction of fan miniaturization and lightweight.
Simulation research on thermal protection performance of firefighting robots and design of protection system
Authors: Fei Yuyang , Zhu Xinrui , Wang Xiao 
Published: December 2022

Abstract
In response to manufacturing strategy demand, fire accidents in petroleum, chemical, forestry, and high-rise buildings are on the rise. Although the firefighting robot can replace fire rescue workers who come into the dangerous rescue site, electronic devices’ thermal failure problem caused by high temperatures in the whole electronic equipment problem is bigger. The proportion of electronic device thermal failure has a significant impact on the normal operation of electronic equipment. How to dissipate heat quickly and avoid local high temperatures becomes a key problem. Most domestic and foreign scholars only study the influence of thermal protection materials themselves on robot protection systems, and few study the influence of heat insulation materials and heat dissipation materials on robot protection systems through appropriate structure combinations. Therefore, the establishment of comprehensive high-temperature fire situations on the fire protection robot automatic detection of smoke concentration and temperature of heat insulation material and heat dissipation material composition of folded tensile structure and liquid nitrogen cooling system thermal protection model of robot thermal protection performance research is of great significance, at the same time through COMSOL Multiphysics software to simulate the proposed model, Select the best heat dissipation materials and heat insulation materials, protect the internal electronic components in the fire accident sustained high temperature, can adjust the temperature as soon as possible, make it adapt to the change of temperature field, for the rescue process to gain 2~15 minutes time duration.
Research on space pursuit and escape strategy of spacecraft based on the artificial immune algorithm
Authors: Zhang Xiran , Du Hongfeng , Liu Yunzheng , Hu Jingjing , Wang Gege , Zeng Dexian 
Published: December 2022

Abstract
This paper attempts to solve the space pursuit and escape problems of a spacecraft with a fixed stay period. The artificial immune algorithm is used to solve the Nash equilibrium solution in the process of both parties’ pursuit and escape, which reduces the complexity of the bilateral optimal planning problem. According to the game process of the pursuit-and-escape, a mathematical model is established. Under the condition that both spacecraft are subjected to continuous thrust, the relative distance relationship between the two ends is defined as the objective function. To shorten the algorithm optimization time to ensure the calculation accuracy, the thrust pointing angle of the spacecraft is designed by integer coding, and the antigen-antibody affinity function is established accordingly. In this paper, the immune operator is designed and defined, which improves the searchability and convergence speed of the algorithm in three-dimensional space. The simulation example gives the optimal control strategy and the corresponding chasing trajectories of both parties, which effectively solves the problem of spacecraft chasing and escaping under a fixed time.
Research on Multi-objective Optimal Dispatch of Power System Based on Demand Response
Authors: Ma Yu , Zhong Libo , Zhao Bin 
Published: December 2022

Abstract
Due to the fluctuation of charge demand at the user side, the rationality of power system operation control with a single parameter setting will be reduced. Therefore, research on multi-objective optimal dispatching of power systems based on demand response is proposed. Firstly, the optimal configuration model of the power system is constructed from the perspectives of energy utilization rate and load demand at the user side. Then, the parameters in the actual executable threshold range are substituted into the model with the balance relationship between the output power of each unit as the constraint. Finally, the parameter setting result with the highest fitting degree between the system and the objective function is calculated and taken as the dispatching objective. The test results show that under the control of the dispatching method designed in this paper, the output of the power system always keeps a high fit with the actual load demand, which has high rationality.
Fault Location Method for the Double-circuit Transmission Line Based on Electromagnetic Time Reversal
Authors: Yang Yu , Liu Xinhui 
Published: December 2022

Abstract
The current fault location ways for the double-circuit transmission lines on the same tower do not consider the coupling relationship of transmission lines. The fault location accuracy is low in practical application. Therefore, a fault location method for the double-circuit transmission lines on the same tower basing on electromagnetic time reversal is proposed in this paper. The six-sequence component method is used to transform the transmission line’s impedance matrix to eliminate the coupling between the lines of the double-circuit transmission line on the same pole. The positive and negative phase characteristics of the transmission line are analyzed by using the fault section identification function to decide the transmission lines’ fault section. The mirror line is constructed by applying the electromagnetic time reversal to measure the distance of the fault point. The experimental results indicate that the maximum error of fault location is only 0. 01 km for a double-circuit transmission line on the same tower, which has high measurement accuracy and good practicability.
Digital twin-oriented multi-physics field simulation analysis of high-voltage SF6 circuit breakers
Authors: Chen Jing , Zhang Keqi , Liang Zhenguang , Du Zongzhan , Zhang Hengxu 
Published: December 2022

Abstract
Circuit breakers are important components for removing short circuits in power systems and ensuring safe operation. The operation of circuit breakers may not be predicted and thus cause accidents, so there is an urgent need to innovate means to assess the operation status of power equipment and monitor the operation status of power grids in full real time, to improve the monitoring capability of major key equipment, and to study key technologies for the digital twin of circuit breakers to support the safe and stable operation of transmission networks and the digital transformation of energy systems. This paper establishes the multi-physics field coupling calculation model of the circuit breaker opening process, completes the simulation calculation of the circuit breaker opening process, gets the distribution and change trend of parameters such as electric field, pressure, temperature, density, and airflow speed inside the interrupting chamber, and analyzes the flow characteristics inside the interrupting chamber in different opening processes. We select the characteristic parameters and provide data support for the establishment of fault diagnosis based on the digital twin of the circuit breaker.
Design and Research of Automatic Error Correction Algorithm for Electric Energy Metering Device
Authors: Li Ze , Liu Xiaoze , Guo Linlang , Sui Jiarui , Xiao Yubai 
Published: December 2022

Abstract
Aiming at the problems of long error correction time and poor correction effect of electric energy metering device, an automatic correction algorithm design of electric energy metering error is proposed. First, the stationary characteristics of the electric energy metering device when errors occur are extracted, and the regular interval of error correction is found. Second, in the regular interval, the average power of the quantization error of the metering device is determined, and the location of the error is found. Finally, the stability is corrected according to the error. According to the interval and error position, an automatic error correction model is constructed, which shortens the error correction time, enhances the automatic error correction of the power calculation device, and realizes the accurate correction of the power calculation error. The comparative experimental results show that the error correction time of the algorithm is short, and it has the ability of real-time error correction, which can be applied in real life.
Intelligent Detection Algorithm of Medium and Low Voltage Switch Performance Based on the Improved K-means Clustering
Authors: Fu Ming , Lu Qifu , Ran Wang , Shi Quan , Fu Dong 
Published: December 2022

Abstract
The performance of medium and low voltage switches will directly affect the reliability of medium and low voltage distribution networks. The medium and low voltage switch algorithm’s failure form is mainly mechanical. In order to realize its intelligent detection, a medium and low voltage switch detection algorithm based on the improved K-means clustering algorithm is proposed. Optimizing the algorithm’s clustering center selection establishes a model of the switch working state under different vibration signals and an intelligent detection algorithm for medium and low voltage switches with intelligent judgment, adaptive adjustment, and remote fault diagnosis. Experiments show that: the detection algorithm of the medium and low voltage switch controller based on the improved K-means algorithm can more accurately identify the fault of the switch algorithm according to the vibration signals, which provides a new idea for the fault identification and monitoring of the medium and low voltage switch.
Design and Implementation of an Intelligent Power Metering and Measurement System based on IoT Technology
Authors: Dong Yongle , Bai Luwei , Yu Jia , Xi Jia , Jin Zhao , Zhang Qi 
Published: December 2022

Abstract
Intelligent power metering and measurement systems are important for expanding the category and quantity of power metering. This paper proposes a design and implementation method of an intelligent power metering and measurement system based on IoT technology. Composed of the perception layer, the network layer, the data layer, the analysis layer, and the application layer, the overall design scheme can not only realize the intelligence, automation, and data visualization of power metering and measurement but also improves the standardization of laboratory management through a standardized metering and measurement system.
Design considerations for hardware implementation of nanoseconds time synchronization low-cost system based on precise time protocol
Authors: Zhang B. , Tao T. , Zhu J. 
Published: December 2022

Abstract
Precise time synchronization is the key for coordinating every node of the distributed
system to complete tasks. The widespread use of Field Programmable Gate Array (FPGA) in
distributed nodes has a positive effect on improving time synchronization accuracy. Although the
use of FPGA could significantly improve time synchronization accuracy, there is not a universal
design guideline. This work has analyzed and summarized three factors that should be considered
when building a low-cost clock synchronization system using FPGA: where the timestamp should be
generated, the calculation and correction of time offset, and how to handle Precise Time Protocol (PTP) messages. Based on these design considerations, the time synchronization system
intellectual property (IP) core was constructed. The synchronization accuracy experiments have
been performed on Zynq system-on-chip (SoC) evaluation boards of different architectures. The
experimental results demonstrated that the time synchronization system constructed in this article
could achieve nanoseconds accuracy.