bluuebunny/crossref_metadata_2025_split huggingface dataset:
Small Diameter Tube Post-Weld Heat Treatment Process with Brinell Hardness and Microstructure Inspection
Authors: Qi Xiangqian 
Published: December 2021

Abstract
The local post-weld heat treatment (PWHT) process test of 9Cr-3W-3Co small-diameter pipe welded joints was carried out using rope-type resistance heaters with different parameters, and the Brinell hardness test and microstructure observation were carried out on the welded joints after heat treatment. The results show that when the heating width was 200mm, the constant temperature was 790°C-800°C, and the constant temperature time was 2 hours, the Brinell hardness of the weld was in the range of 246HBW-265HBW, which had good performance. After tempering at 760°C-800°C, the welds all showed a clear tempered lath martensite.
Comparison and Evaluation of Domestic and Foreign Radiation Environmental Standards for Nuclear Power Plants
Authors: Yu Jiahuan , Zhang Xiaofeng 
Published: December 2021

Abstract
With the development of the nuclear energy industry and the increasing demand for environmental protection, the impact of nuclear power plant radiation on the environment has gradually entered the public view. This article combs the nuclear power plant radiation environmental management systems of several countries, takes the domestic and foreign management of radioactive effluent discharge from nuclear power plants as a starting point, analyses and compares the laws and standards related to radioactive effluents from nuclear power plants in France, the United States, China, and South Korea. In this paper, the management improvement of radioactive effluent discharge system of Chinese nuclear power plants has been discussed.
Analysis on radiation control and the impact of land pipeline leakage of offshore nuclear power plant on groundwater
Authors: Liu Lianghui , Yu Jiahuan , Xu Yueping 
Published: December 2021

Abstract
Using the groundwater migration and dispersion analytical model, combined with the topography and groundwater characteristics along the land drainage pipeline of an offshore nuclear power plant, the migration and dispersion of six radionuclides (3H, 14C, 137Cs, 134Cs, 60Co, 90Sr, etc.) in groundwater under the condition of pipeline breach accident are predicted. The scope of impact of radionuclides and the annual effective dose caused by drinking water pathways to the public are analyzed. By summarizing the radionuclide concentration and dose index requirements for groundwater at home and abroad, the corresponding environmental impact assessment is given. The prediction results show that the radionuclide concentration and public effective dose at the same distance first increase and then decrease with time, and the peak radionuclide concentration and maximum public effective dose gradually decrease with distance increasing, in other words, the impact of the breach accident on the distance above 30 m is limited.
Effect of Powder Feeding Rate on the Forming Quality of Alloy by Laser Melting Deposition
Authors: Duan Chenghong , Zhang Yinzhou , Luo Xiangpeng 
Published: December 2021

Abstract
12CrNi2 alloy steel was prepared by Laser Melting Deposition (LMD) technology, and the effect of powder feeding rate on surface quality, internal defects, microstructure, and microhardness of the single track and manufactured part were investigated. The results show that the metallurgical bonding of the single track deteriorates, the surface quality of the manufactured part is improved, the average microhardness of the manufactured part increases, and the number of pores first decreases and then increases with the increase of powder feeding rate. At the lower powder feeding rate, the manufactured parts have larger pore defects, while at the higher powder feeding rate, the manufactured parts have poor fusion defects. The main phase composition of the manufactured parts is ferrite(F), granular bainite (GB), and pearlite(P), and the manufactured part has finer grains at the higher powder feeding rate.
5G-V2X Based Traffic Safety Warning System through Mobile Sensor and Wireless Communication
Authors: Liu Yu , Wang Xinzheng , Zheng Huiling 
Published: December 2021

Abstract
This project designs a traffic safety early warning system based on 5G-V2X for the current situation of increasing traffic accidents in China, which concentrates on two modules of V2V (vehicle-to-vehicle), V2I (vehicle-to-road) for early warning system design, with OBU (vehicle communication unit) and RSU (roadside communication unit) based on 5G-V2X communication technology to establish vehicle-to-vehicle and vehicle-to-road interactive communication, and realize V2V collision warning and V2I traffic light emergency event warning at intersections through collision risk warning algorithm and intersection passage assistance algorithm, thus alerting drivers to avoid dangerous situations and reducing the incidence of traffic accidents.
Application of Fuzzy Analytic Hierarchy Process and Three-Dimensional Terrain Model in Traffic Routes Selection
Authors: He Xinpeng 
Published: December 2021

Abstract
The selection of a road route plan is an essential preliminary task. The choice of the route greatly influences its function, role in the road network, economic development of the areas along the route, and the return on investment. In this paper, qualitative analysis and evaluation of the details of the proposed route options in terms of ecological environment and engineering economy are carried out through fuzzy hierarchical analysis, based on the route data from Bushang to Bizhou, to combine the principles of the routes and develop several route options. Among the pre-determined route options, screening and comparison are carried out, and Option II is proposed as the recommended route.
Numerical simulation and experimental study on valveless piezoelectric pump with triangular obstacles
Authors: Sun Yeming , Wang Yu , Wang Yiwei 
Published: December 2021

Abstract
A valve less piezoelectric pump with triangular obstacles is designed and manufactured, which uses piezoelectric vibrator as power source. The working principle and theoretical flow rate of the valveless piezoelectric pump are analyzed, and its flow rate expression is derived. The flow resistance characteristics of triangular obstacles are simulated by numerical simulation. Based on the mass fraction distribution of liquid water, the forward and reverse flow resistance of triangular obstacles and the influence of triangular obstacles on pumping capacity are analyzed. Finally, two groups of test prototypes of the valveless pump are made by using the engraving machine, and the flow measurement test is carried out. The experimental results show that the valveless piezoelectric pump with triangular obstacles can realize the valveless pumping function, and the pumping flow per unit time increases with the increase of triangular obstacles in the channel, and decreases with the increase of the distance between triangular obstacles and the channel. When the driving voltage is 140V and the driving frequency is 10Hz, the maximum output flow of the piezoelectric pump is 16.26ml/min.
Contrastive Studies of Z-Source Converter and Boost Converter on Photovoltaic Maximum Power Point Tracking System
Authors: Li Yuansong , Gao Bo 
Published: December 2021

Abstract
Aiming at a series of issues on traditional boost converter which commonly used in photovoltaic maximum power point tracking (MPPT) devices, such as the limited output voltage, the low boost efficiency, the excessive heat generating, this paper proposed a novel z-source converter. Compared with traditional boost converter, several researches have done among topology structure, operational principle, boost factor. Based on the theoretic analysis, this paper given two schemes of photovoltaic MPPT system which using boost converter and z-source converter, the models of them are established based on Matlab. The simulation results indicate that the duty-ratio of photovoltaic MPPT system based on z-source converter is smaller, the stability of MPPT is better. The novel z-source converter can fundamentally solve the issues caused by traditional boost converter in photovoltaic MPPT devices, and it has incomparable advantages than traditional boost converter in the field of photovoltaic power generation.
Design of intelligent power distribution robot system based on machine vision
Authors: Chen Wenqi , Liu Fenggang 
Published: December 2021

Abstract
With the increasingly serious aging of our society, labor shortage will seriously hinder the development of social economy. Robots gradually integrate into human production and life, and gradually serve more and more people. In order to solve the problem of large path deviation of the transmission system in the food conveying path, an intelligent food conveying system based on machine vision is proposed. The hardware circuit of the whole system is composed of image acquisition module, power module, electric drive module, etc. in the software part, the vertical volume matching method is used to set the optimal path. Through practical investigation, the scheme is feasible, can rely on the actual intelligence of catering distribution, has good application and promotion value.
Design of a grasping robot control system using kinematics model
Authors: Chen Wenqi , Liu Fenggang 
Published: December 2021

Abstract
Aiming at the problem of mechanized and repeated parts grasping, and aiming to reduce the development cost, this study added an end-effector and designed a ROS-based grasping robot control system on the basis of fully analyzing the structure and workflow of the robot. The grasping robot can be controlled and monitored in real time by operating on the RVIZ interface. According to the needs and process of grasping work, the control system process design and control system programming of the robot are completed. Subsequent simulation experiments and real object control experiments show that the control system has high robustness and real-time performance. The control system can meet the task of mechanization and repeated parts grasping, and can effectively improve the production efficiency, enhance the competitiveness of enterprises, and reduce the cost of enterprises.
Precise Linear Positioning Method Based on Transmissive Two-Stage Diffraction Grating System
Authors: Lu Jin , Lu Jiannan , Ma Jun , Gong Zaiyan 
Published: December 2021

Abstract
This paper mainly studies the precise linear positioning method based on the transmissive type two-stage diffraction grating system. Starting from the analysis of the two-stage diffraction principle, the mathematical model of the two-stage grating diffraction is established, and the positioning characteristics of the differential positioning method and the modified positioning method are discussed. The simulation experiment of the linear positioning device is carried out to study the displacement characteristics. The experimental results show that the precise positioning based on the diffraction grating can obtain a positioning accuracy of ±0.4 μm.
Design of linear phase shifting transformer based on linear motor
Authors: Jie Xue , Zhao Jinghong 
Published: December 2021

Abstract
In this paper, a linear phase shifting transformer based on linear motor is studied. The transformer is composed of four groups of three-phase full-bridge inverter system and a linear core. The DC power supply can be converted into three-phase alternating current through the inverter system and the linear phase shifting transformer. Compared with the traditional phase-shifting transformer, the linear phase-shifting transformer is easy to expand, easy to connect, and has better heat dissipation. The simulation results show that this scheme is feasible.
A heap strategy for UAV deployment issues under mobile terrestrial wireless communication networks
Authors: Li Yanlin 
Published: December 2021

Abstract
Unmanned on-board mobile base stations (MBSs) can more effectively solve wireless connectivity problems in terrestrial communication networks without fixed infrastructure. The purpose of this article is to minimize the number of MBS required to provide wireless coverage for a set of distributed ground terminals (GTs). Traditional clustering algorithms are no longer applicable because each drone has a different coverage area size and the traditional K-Means clustering algorithm has no limit on the number of heaps that can exceed the maximum coverage area of a single drone, making it impossible for a drone to provide services. In response to this problem, the traditional K-Means clustering algorithm is optimized, and the results of the optimized K-Means clustering algorithm are stacked to ensure that each pile has the corresponding drone capability to serve it.
The progress of mini black holes: principles and analytical astronomical observation techniques
Authors: Tan Jiatong 
Published: December 2021

Abstract
Mini-black hole (MBH) is a concept first proposed by Stephen Hawking in the 1970s. Normally, exploring MBHs will enhance the understanding of quantum theory and gravity theory as well as be helpful in predicting the configuration of the early universe. Based on information retrieval, this paper summarizes the progress of MBHs and takes three major aspects: background, models, practical methods for observations, and analysis. Specifically, the descriptive equations are derived, and different models are discussed separately. These results shed light on the prospective development of quantum field theorem, general relativity, and string theory.
The added water control system based on neural network model and double parameter corrected for loosening and conditioning cylinder
Authors: Li Zijuan , Chen Jiaojiao , Gao Yang , Jia Xiaohui , Zhao Liyuan , Feng Zixian 
Published: December 2021

Abstract
In order to improve the stability of outlet moisture in the of loosening and conditioning cylinder, we concentrate on loosening and conditioning cylinder, and design the prediction model of the added water volume based on neural network technology and the double parameter corrected control system of material balance and moisture deviation for loosening and conditioning cylinder by using historical production data. Taking the set value of inlet and outlet moisture of the loosening and conditioning cylinder as the input factor and the added water volume as the output factor, the prediction model of the added water volume was to predict the total volume of the added water. When there was a big deviation between the actual value and the set value of outlet moisture, the double parameter corrected control system of material balance and moisture deviation was used to correct the deviation, so as to improve the outlet moisture stability and the control accuracy of the added water volume. Using Cigarette brand “diamond (hard-case Yingbin)” produced by Zhangjiakou cigarette factory to built model and analysis, the results showed that after the improvement, the standard deviation of output moisture of loosening and conditioning cylinder reduced by 0.27%, and the control stability and the control level of production process were improved.
The Progress of Black Holes: Principles & Physical Detection Technology
Authors: Chen Tianyi , Ge Shutong , Li Jiahui , Ma Xuheng 
Published: December 2021

Abstract
Humans have been trying to explain black holes since the 19th century, using theoretical understanding and observations of the universe. Incandescent body thermal radiation has been the focus of extensive theoretical and experimental research for over a century. This paper will discuss the concept of a black hole and use information retrieval to generate a panoramic image of it. The content illustrates black holes from three different perspectives: description of black holes using mathematical methods and data, models, and detection. A black hole is a controversial object, and no one knows for sure what it is. Indeed, multiple numerical simulations have been carried out to investigate the critical behaviors of black holes with various geometrical configurations in arbitrary dimensions. We will sum up the black hole knowledge so far and discuss the recent progress in terms of black hole exploration, i.e., shed light for future black holes model construction and detection.
A Study on the detection and formation mechanisms of ultra-massive black holes
Authors: Rao Hongyu , Wang Zhongqi 
Published: December 2021

Abstract
With the discovery of Ultra-massive black holes and Super-massive black holes, humans have yet to find out the cause of their formation with modern technology. Based on the analysis, we will look at the detection methods and calculation methods for black holes and their mass. Besides, we will also dive deeper into the actual formation of these Ultra-massive black holes. Taking a closer look at black holes’ sizes, there are many black holes between 0.1Ms and up to its maximum 150Ms, but something interesting is that after 150 Ms, we can barely find any black holes bigger than that until we reach black holes with millions of times the mass of our sun. This is quite fascinating, as if the knowledge we have now suggests that bigger black holes are formed through devouring and merging of other black holes. It is simply impossible for some of these black holes to even exist, as looking at the amount of time the universe existed, that is impossible for black holes of this mass to even form. In this paper, the detection method for black holes and black holes’ mass and the formation model of ultra-massive black holes will be discussed, which involves concepts like Quasi Stars and Quasi Black holes. These results shed light for us to discover the formation of ultra-massive black holes.
Research on Silicon Wafer Manufacturing Process and Physical Properties Testing Using High-Purity Polysilicon
Authors: Hu Xiaoming 
Published: December 2021

Abstract
The shape of a bare wafer is round, so it is called a wafer or a silicon wafer. It is the basis for the production of silicon semiconductor integrated circuits. The silicon wafer is cut from a large piece of semiconductor material silicon ingot. The high-purity polysilicon (its purity is up to 99.999999999%) is into a large single crystal, given the correct orientation and an appropriate amount of N-type or P-type doping, a silicon ingot is obtained through five-step crystal growth. Wafers (wafers) are then made from silicon ingots by more than eight processes. This paper investigates the single crystal silicon growth and wafer preparation process technology, and finally discusses the evolution of wafer size growth and changes in the development of the semiconductor industry chain.
Design of Infrastructure for Pumped Storage Power Station and Automatic Monitoring System Using Geographic Information System
Authors: Wang Yang , Wang Binbin , Zhu Tongyi 
Published: December 2021

Abstract
The pumped storage power station realizes grid connected power generation through the conversion between the potential energy of surface water and mechanical energy. It has become the strategic resource of UHV power grid with its low valley peak regulation and emergency standby function. The green basic design and design of the pumped storage power station needs systematic research. Based on the collaborative analysis method of production and ecological safety of storage disk, this paper takes Ninghai pumped storage power station as an example to carry out green infrastructure planning and design research. Through the comprehensive evaluation and analysis of construction land based on GIS, from the perspective of adaptability of power station construction to mountain creek pit environment, the function of horizontal layout is constructed in parallel and vertical layout, and a modular and distributed spatial structure of green infrastructure is constructed; Then, based on the continuous recycling of water resources, the monitoring and early warning system of power plant production ecological safety is constructed, which is “one water, two lines and three slopes”. It is hoped that the correlation between the production and the ecological dispatching of the storage tray can be found through the dynamic tracking of multiple factors and quantitative analysis of production cycle, which can provide reliable basis for timely mitigation of damage and formulation of compensation strategies, Scientific control of green infrastructure planning, design and construction.
Development of Low-Power Wide-Area Communication Gateway for Power Data Transmission
Authors: Sun Jian , Wu Hao , Huang Zhiyuan , Bei Binbin , Cao Songqian , Fan Chenghong 
Published: December 2021

Abstract
With the rapid development and maturity of communication technology, integrated computer technology and sensor technology, small sensors with sensing, computing and communication capabilities have begun to appear all over the world. The sensor network composed of these small sensors has received a lot of attention. This paper studies the low-power wide-area communication gateway for power data transmission. Based on the analysis of the energy consumption strategy of the power data transmission process, the low-power wide-area communication gateway for power data transmission is developed, and the developed gateway was tested. According to the peer test results of the gateway, the packet loss rate of the gateway within 100m is relatively good. Therefore, when arranging network nodes, try to control the transmission distance of the gateway within 100m. The energy consumption test shows that the energy consumption of the gateway is basically in an ideal state.
Design of an 8X8 Optical Matrix Protection Device based on Electric Power Communication Network
Authors: Fan Xinxin , Chen Xiuguo , Yan Hongmei , Wang Jianbing 
Published: December 2021

Abstract
In order to realize the fast establishment of power fiber circuitous channels, the reliability of power communication optical cable network is guaranteed. An optical matrix 8X8 protection device is designed by using all-optical switcher. The test results show that at the end of each input light path, any 8 paths can be switched, it can achieve 1:8 protection switch, realized the arbitrary switching of three modes and has the function of remote fiber route scheduling.
Preparation and the Mechanical and Tribological Properties of Laser Cladding Coating
Authors: Zhou Xin , Wang Yanjun , Liu Lei , Guo Xingju 
Published: December 2021

Abstract
laser cladding of snsbcu based alloy coating on GCr15 steel substrate was carried out by using lam-400s powder feeding metal printer. The hardness, friction coefficient and microstructure of the coating were tested by Vickers hardness tester, friction and wear tester, metallographic microscope and scanning electron microscope. The effects of laser cladding parameters on the dilution ratio, hardness and friction coefficient of the sample were studied; With the increase of laser power, the hardness of the coating is improved, and the hardness distribution is more uniform; The friction coefficient of the coated sample decreases greatly compared with that of the substrate.