bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Control System of Friction Welding Machine for 5000kN Large Electrolytic Aluminum Prebaked Anode Conductor
Authors: Feng Xiaolin , Mao Haijie , Liu Chaorong , Liu Manqiang 
Published: January 2021

Abstract
A friction welding machine, which improves the connection performance of two different metals by generating heat of relative movement of friction, could increase the maximum contact area and lower energy and human labor consumption. The machine’s control system reaches the manufacturing process’s demands with its design and exerts its promising prospects.
Discussion about the maintenance period and spare parts of electric multiple units
Authors: Li Yongsheng , Liu Tao , Zhang Yongsheng 
Published: January 2021

Abstract
This article firstly discusses the problem about maintenance period of electric multiple units (EMU); Secondly, the types of spare parts and process of calculating the quantity of them during the life cycle period for 30 years are introduced. At last, the determination process of preventive maintenance(PM) and corrective maintenance (CM) spare parts is introduced in detail by taking the secondary suspension of bogie system as example.
A 2.7GHz sub-sampling phase-locked loop circuit
Authors: Xin Xiaoning , Peng Xu , Jian Ren , Qiao Wenhu 
Published: January 2021

Abstract
A 2.7GHz low phase noise sub-sampling phase locked loop is introduced. The low noise performance is realized by using the sampling loop and the frequency lock loop. In the locked state, only the sampling loop works, while the frequency lock loop does not work, and the frequency divider does not work. Therefore, in-band noise generated by the phase detector and charge pump will not be amplified N2, so the sampling loop’s in-band noise will be greatly reduced. In order to reduce out-of-band noise, the voltage controlled oscillator is a LCVCO with nmos-pmos complementary structure. The PLL is based on TSMC 130 nm CMOS process. Under the working voltage of 1.8V, PLL consumes 24.6mw.
Research on Optimal Method of Multi-regional Power Grid Investment Project
Authors: Li Hui , Liu Zifa , Yu Puyang , Wang Zhidong , Zhao Lang 
Published: January 2021

Abstract
The optimization of multi-regional power grid investment projects is the basis for ensuring the benefits of power companies and can meet the urgent needs of power grid development. This article first takes the historical benefits of power grids, planning benefits, power grid scale and development needs as indicators to establish a multi-regional power grid investment project optimization index system. Then this article puts forward the investment project optimization model. With the goal of maximizing investment benefits, with project portfolio constraints, grid scale development demand constraints and investment constraints as constraints, the binary particle swarm algorithm is used to optimize the investment project portfolio schemes of various regions. Finally, an example is used to verify the effectiveness and feasibility of the method proposed in this paper.
Influence of the Amplitude of Inlet Axial Pulsating Flow on Turbine Working Characteristics
Authors: Ji Bing , Wang Zhiduo , Li Jun 
Published: January 2021

Abstract
The flow field at the outlet of the rotating detonation combustor has strong pulsation characteristics, and this strong impact will bring fatal damage to the downstream turbine. In this paper, the simplified sine wave model was used to simulate the rotating detonation wave to study the characteristics of the turbine working in a pulsating flow field. The results show that the greater the amplitude of the incoming flow pulsation, the stronger the non-uniformity of the aerodynamic parameters and heat transfer parameters of the flow field inside the turbine. The increase in the amplitude of the incoming flow pulsation will aggravate the separation of the end wall secondary flow and the cascade flow, resulting in greater flow loss and reducing the working efficiency of the turbine.
The stability analysis of new power generation based on Ostrowski’s theorem
Authors: Yang Lei , Huang Wei , Zhang Dan , Li Shengnan , Xiang Chuan , Xi Xinze , He Xin 
Published: January 2021

Abstract
The parameter mismatch between the source side and the grid side of the grid-connected system of new energy generation is one of the factors affecting the stable operation of the grid connected system. In order to ensure the safe and stable operation of the system, the stability region of system parameters is worth studying. In this paper, a fast estimation method of stable region of impedance parameters for grid connected inverters is proposed. Firstly, the impedance model of grid-connected system in dq coordinate system is established based on the impedance analysis method, and the return matrix which is the main element influencing the stability is analyzed and deduced. Secondly, the bands containing eigenvalue loci of the return matrix are obtained based on Ostrowski’s theorem, and the stability of the system is judged by Nyquist stability criterion. Finally, the simulation results show that the proposed method can quickly estimate the stable region of the impedance parameters of the grid-connected inverter, which verifies the correctness of the method.
Abnormal network access detection of power Internet of Things terminal layer equipment based on equipment portrait
Authors: Yang Dongkai , Zhang Xiaoliang , Wu Kehe , Lu Lipeng 
Published: January 2021

Abstract
In the environment of the power Internet of Things, equipment network security is mainly analyzed through the physical signal characteristics of the equipment or a single flow characteristic, so as to realize the equipment network abnormality detection. Therefore, a method for detecting network abnormalities of power Internet of Things terminal equipment based on device fingerprints is proposed. Aiming at the problem of incomplete detection methods, a multi-dimensional matching device fingerprint model is established. Firstly, the basic information of the device is collected, such as IP, MAC, etc.; then the network traffic information of the device is analyzed to extract the characteristics of network traffic; then, the frequency of keyword and keyword group of service protocol is counted. The device fingerprint model is established by using the traffic and service characteristics. When the network anomaly occurs, the device fingerprint model can be found effectively. The experimental results show that the device fingerprint model can detect the abnormal behavior of the device.
Design of a flyback high-efficiency switching power supply
Authors: Jing Zhao , Shuang Wang Xiao , Jun Rao Xue , Ya Zhang Lu 
Published: January 2021

Abstract
Switching power supplies are widely used in automotive, aviation, and DC speed control fields. Its biggest requirement is stable output and high efficiency. It is usually realized by resonant converters, but its control circuit is complex and the output ripple is large. In this paper, a new type of flyback switching power supply is designed using a flyback conversion circuit and a single-tube self-excited conversion circuit. Experiments have shown that the designed switching power supply improves the efficiency and reliability of the power supply while obtaining a small ripple, continuously adjustable, and stable DC voltage.
Parameters Optimization Model and Solution Method Based on 3D Manufacturable Units
Authors: Tao Zhenming , Zhang Zhixiong , Luo Zirong , Tang Li , He Lijun 
Published: January 2021

Abstract
At present, the lightweight design methods for SLM (Selective Laser Melting) process cannot meet the performance requirements while maintaining the consistency of the appearance of parts, and there are some defects in material cost and processing efficiency. In order to improve these defects, this paper proposed a lightweight reconstruction parameters optimization model based on 3D manufacturable units, and finite element simulation and Matlab calculation were used to solve the model to obtain the optimal structural parameters. Finally, the reconstruction design of typical parts was taken as an example to verify the feasibility of the model and the solution method.
Study on Dry-Ice Particle Jet Polishing Process of 316L Stainless Steel Electrode
Authors: Yang Weiying , Feng Xu , Xing Yingjie , Pan Weihao , Song Jinlong 
Published: January 2021

Abstract
Dry-ice particle jet technique has the advantages of rapid sublimation, easy drying, and without residues after striking onto the surface, which has been applied in the field of optical coating and the polishing and cleaning of integrated circuit. However, the process mechanism of this technique on stainless steel is not clear and the application research is not in-depth, which restricts the development and application of dry-ice particle jet technique in electrode polishing. In this work, the influence of the processing parameters such as spraying pressure, spraying angle, spraying distance, and spraying time on the micro-morphology and roughness of the stainless steel electrode surface was studied by single factor experiments. In addition, the characterization methods for the surface roughness, surface defects, surface micro-morphology, surface micro-unevenness, and surface chemical composition of the stainless steel electrodes were developed. Comprehensive characterization technology of the electrode surface was established.
Analysis and Optimization on Vibration Characteristics of Twin Screw Pump
Authors: Zhong Yan , Zhou Pu , Fu Dongliang , Lu Zhen 
Published: January 2021

Abstract
Based on double screw pump as the research object, the vibration of twin screw pump under different outlet conditions and different technological parameters were tested. The vibration characters of the pump under various technological parameters were analyzed from the experimental point of view. The key parameters influencing the vibration characteristic of twin screw pump were found out and corresponding optimization measures were taken. By using the numerical method of fluid mechanics, the three-dimensional flow field inside the pump chamber was analyzed, and the internal working mechanistic and influencing factors were discussed. Local optimization was carried out to reduce the influence of fluid excitation force on structure vibration. The research results of this paper can provide necessary practical basis for the optimization of vibration and noise reduction of twin screw pump.
Research on The Wireless Communication Scheme of Substation Full Coverage
Authors: Zhang Hongmei , Zhang Ji , Zheng Ziyao , Li Liangyu , Zhang Yan 
Published: January 2021

Abstract
In order to meet the mobility and Broadband communication requirements of smart substation, this paper proposes a wireless communication scheme based on Wireless-Fidelity network for substation all-domain coverage, and makes an in-depth analysis of network performance. In this way, a communication scheme suitable for specific electric power application scenarios can be created, which can effectively improve the basic support capacity of information communication.
Research on Clustering Management of Power Distribution Internet of Things Based on Trusted Blockchain
Authors: Sun Yue , Chen Wei , Chen Leran , Li Min 
Published: January 2021

AbstractSince the topological structure of power distribution Internet of Things is getting more and more complicated, and the amount of new services, such as remote dynamic monitoring and two-way real-time interaction, has been increasing, it is urgent and necessary to study the clustering management technology of power distribution Internet of Things combined with its running scenarios, security requirements and dynamic access characteristics. In this paper, a clustering security management scheme of power distribution Internet of Things based on trusted blockchain is proposed. The clustering management and data communication of power distribution Internet of Things are conducted based on trusted blockchain, which can improve the security of data interaction.
Engineering geological evaluation of landslide in a certain area
Authors: Xu Jiangtao , Yang Zhenwei , Sun Chengyong 
Published: January 2021

Abstract
Based on the analysis of the surrounding environmental conditions and the basic characteristics of the potential landslide, the stability of the potential landslide is analyzed, calculated and evaluated. Based on the analysis, the development trend and hazard assessment of potential landslide are obtained, and the prevention scheme is put forward, which plays a certain role in preventing landslide disaster.
Application of Magnetization Treatment in Flotation
Authors: Kong Yaran , Li Fengjiu , Jia Qingmei , Li Guofeng 
Published: January 2021

Abstract
With the decrease of mineral resources reserves, the characteristics of “poor, fine and miscellaneous” of mineral resources are becoming more and more obvious. People pay more and more attention to the environmental protection. A simple, green and efficient separation process magnetization flotation has been paid more and more attention by mineral processing workers. Based on the analysis and summary of the development process and advantages of magnetic flotation, the application status of magnetic flotation at home and abroad in the processing of ferrous metal ore, non-ferrous metal ore, rare metal ore, precious metal ore, non-metallic ore, coal, etc. Compared with conventional flotation, it is found that the cost of magnetic flotation is lower than that of conventional flotation. Combining theoretical analysis, computer simulation, experiment and advanced detection methods, the mechanism, influencing factors, process and equipment of magnetic flotation are the development trend in the future.
Effect of the Surface Roughness on Cross Sectional Properties of 1×3 Polymer Optical Fiber-based Splitter
Authors: Ab-Rahman Mohammad Syuhaimi , Guna Hadi , Arsad Norhana 
Published: January 2021

Abstract
This research focuses on the fabrication of 1×3 low-cost splitter based on polymer optical fiber (POF) and the characterization of the surface roughness on cross-sectional properties of the device. Due to the unique features and advantages of POF such as flexibility, low-cost material, and easy to install, POF is also resistant to high temperature and immune to electromagnetic noise (EMI). Thus, fabrication method to produce a 1×3 POF splitter using a low-cost fusion technique has been studied. A fabricated prototype will go through a characterization process by observing the performance of POF varied by the surface roughness of the devices. Two main parameters, such as excess loss and power efficiency percentage are obtained to observe the surface roughness on the fabricated device. The experimental results reveal that surface roughness is not giving a significant impact on the efficiency of the device. However, when it linked to a twisting ratio parameter, surface roughness shows predictable curves on the power efficiency of the low-cost POF splitter.
Fluid structure coupling simulation analysis of vibration assisted 3D bioprinting extruder
Authors: Li Bicong , Lin Sheng 
Published: January 2021

Abstract
Aiming at the problem of high wall shear stress at the nozzle of micro extrusion biological 3D printing technology, this paper proposes a method of reducing the viscosity of biological ink through vibration, so as to reduce the shear stress and improve printing efficiency and cell vitality. The 3D bioprinting extrusion device is taken as the research object, and the influence of vibration parameters on the printing process is studied on by fluid structure coupling simulation of the extrusion device.
Study on Ergonomic Digital Evaluation System for the Naval Shipborne Command Cabin Based on Extended JACK
Authors: Wu Jinchun , Xue Chengqi , Du Xiaoxi , Tong Mu , Miao Xinyue 
Published: January 2021

Abstract
The naval ship command cabin(NSCC) is an important part and the nerve centre of the whole ship. In order to achieve better evaluation and design improvements of the human-machine interface(HMI) of the naval shipborne command cabin in the design phase, we preliminarily expounded the ergonomic digital evaluation system of the NSCC based on extended JACK. The NSCC human-machine interface evaluation index system was constructed by using the improved Delphi method, and the quantitative and qualitative evaluation method was studied. The ergonomic digital evaluation system for the naval shipborne command cabin was developed by extending the JACK software, in which the mannequin module, human-machine interface design module, evaluation module and design standards module were integrated. Finally, the feasibility and applicability of the proposed ergonomic digital evaluation system were verified by an illustrated example.
Home intelligent integrated wardrobe
Authors: Zhang Yu , Miao Fengyi , Xing Shengbo , Wang Zhentong , Xiong Xinhong 
Published: January 2021

Abstract
With the development of Internet of Things technology, smart homes are increasingly entering the lives of the people. More and more families have put forward ironing, drying, disinfection and intelligent requirements for household wardrobes. However, most household wardrobes currently only have storage functions, which cannot meet people’s needs. Based on the above background, the project team designed a home smart integrated wardrobe. The household intelligent integrated wardrobe can be applied to most families. It has the characteristics of low price, rich functions, and convenient use. The home intelligent integrated wardrobe is conducive to improving people’s living standards and has good application prospects.
Design of deicing device for wind turbine blade based on microwave and ultrasonic wave
Authors: Luo Ruiliang , Chen Xu , Guo Jinyu 
Published: January 2021

Abstract
Nowadays, wind turbine deicing has become a hot research topic. The traditional deicing method of blade has many problems, such as high energy consumption, low efficiency and low effect. In order to solve the above problems, the project team designed a wind turbine blade deicing device based on microwave and ultrasonic wave. During the operation, two deicing methods, namely microwave thermal energy, ultrasonic cavitation effect and thermal effect, were used to deice in stages to achieve the purpose of high efficiency and energy saving. The whole device is composed of walking system, microwave system and ultrasonic system, and the operation of the device is realized by the electrical control part. Compared with the existing deicing methods, the device can achieve the purpose of low energy consumption and high efficiency Deicing; in addition, the device has the advantages of flexible mechanism for control, less pressure on wind turbine blades, and low cost.
Design and Development of Intelligent Fire-fighting Robot Based on STM32
Authors: Wu Changzhong , Ge Fan , Shang Guangchao , Zhao Mingpeng , Wang Guitao , Guo Hengshuai , Wu Liang 
Published: January 2021

Abstract
With the rapid growth of economy, fires occur frequently in various dangerous places. According to the investigation, in the ancient tragic fire cases, the number of intelligent mobile fire-fighting equipment is very small, and ordinary fire extinguishers and fire-fighting trains can’t put out the fire in time and quickly. As a kind of robot, intelligent fire-fighting robot plays an increasingly important role in fire-fighting and rescue. In this paper, the design of fire robot is studied. Intelligent fire-fighting robot is mainly composed of fire-fighting movement system, fire-fighting water spray system, fire-fighting control system and other components. All parts cooperate with each other and work together to complete the fire-fighting task.
Evaluation of Oil Paper Insulation State of Traction Transformer
Authors: Liu Jiyong , Liu Yang , Yao Qi , Zhang Hao , Tian Xingjun 
Published: January 2021

Abstract
The improved grey target theory is applied to study the aging state of oil paper insulation of traction transformer. Firstly, the data are measured by the recovery voltage method and the related parameters are identified based on the ED equivalent circuit model, and the extracted parameters are used as the characteristic quantity to evaluate the oil paper insulation state. Secondly, according to the different influence of each characteristic quantity on the aging state of oil paper insulation, the combination algorithm of improved AHP and entropy weight method is used to allocate the weight of each characteristic quantity. Thirdly the paper insulation evaluation model of traction transformer is established. Finally, the data of several traction transformers are collected and the classification calculation of oil paper insulation state is carried out. The example shows that the method can effectively and reasonably evaluate the aging state of oil paper insulation of traction transformer, which can provide reference for condition based maintenance of traction transformer.
Research on the Design of Electrical Control System of Production Machinery
Authors: Liu Yangliu 
Published: January 2021

Abstract
The principles of feasibility, rationality, compatibility and reliability should be followed in the design of electrical control system of production machinery. The design should meet the design requirements on the basis of repeated simulation tests. The electrical control system design of production machinery mainly includes the schematic design and technological design of electrical control. This paper analyzes the basic methods and design points of schematic design and technological design to provide references for related researchers.
Research on the critical equipment parameter control technology of slim cigarette rod forming
Authors: Zhang Tao , Zou Quan , Zhao Yunchuan , Pan Wen , Hu Qun , Yang Lei , Wu Jiacan , He Xufeng , Xu Yan Qun , Pu Qian , Wang Haijuan , Zou Juan , Feng Hongtao 
Published: January 2021

Abstract
In order to obtain the optimal control of the parameters of the critical equipment for the formation of a slim cigarette rod. In this study, the loose-end rate and weight stability are taken as the measurement indicators. According to the five factors that affect the control parameters of the critical equipment of tobacco forming, the “Uniform Design Method” is used to set up different control parameter combinations. The stepwise function is used to analyze the quadratic polynomial stepwise regression analysis, and the control parameter model is established and verified and optimized. The results show that the negative pressure of the suction chamber is 90Mbar, the proportion coefficient of the needle roller is 78%, the thickness of the block above the cleaver disc (the rail of the suction) is 2.5mm, the gap between the wire pressing wheel and the rail of the cigarette gun is 4.3mm, and the height of the cigarette tongue outlet is 4.3mm. The optimal range of the forming parameters of the cigarette rod can be obtained, which can effectively reduce the loose-end rate of the slim cigarette rod and improve the stability of the cigarette weight.
TiC nano-coating and their tribological properties were deposited by doal-ion beam sputtering on the tool surface
Authors: Zhongyu Dou , Zhangfaguang  , Guoyinglu  , Chenshaobo  
Published: January 2021

Abstract
By using the method of doal-ion beam sputtering deposition, N element is injected with ions to assist sputtering deposition of TiC to prepare the TiC nano-coating with high binding strength. SEM, XRD, dynamic ultra-micro hardness tester, friction and wear testing machine were used to characterize and analyze TiC properties. The results show that the TiC coating prepared by double ion beam sputtering deposition has high hardness, high bonding strength, good friction and wear performance, and improves tool service life.