bluuebunny/crossref_metadata_2025_split huggingface dataset:
Difference analysis of non-contact planar scroll spring with the same stiffness
Authors: Jiangnan RAN , Tao YANG , Zizhen CAO , Yang XIN , Kun WANG , Chunguang XU 
Published: August 2021

Abstract
In this paper, a set of mathematical models of non-contact planar scroll springs with the same stiffness are established. Based on ABAQUS simulation analysis software, the finite element modeling was carried out, and the modal, torsional stiffness, maximum stress and stress distribution of each plane scroll spring were analyzed. At the same time, the results of finite element analysis (torsional stiffness and maximum stress) are compared with the results of empirical formula, and some experimental data are introduced. The results show that the results of the two methods are basically the same, but there are still some differences. Although the empirical formula is more simple and general, the finite element simulation analysis still has a certain reference significance in the selection and design of spring, especially for the plane scroll spring with high precision mechanical properties.
Corrosion analysis of angle steel used in 500kV transmission tower
Authors: Hao Chen , Yang Guo , Wentao Tian , Xin Qiao , Xiaomeng Tan 
Published: August 2021

Abstract
Transmission tower is the load-bearing structure of high-voltage transmission line, and its stability is very important for the reliable operation of grid equipment. In recent years, the corrosion of transmission towers has become increasingly prominent due to long-term service in the harsh field, which seriously affects its service life. In this paper, the corroded angle steel of high-voltage power tower was studied by different physical and chemical testing methods such as macro inspection, metallographic analysis, mechanical property test, chemical composition analysis, energy spectrum analysisand scanning electron micrograph analysis. The result reveled that the galvanized protective layer of the angle steel was well preserved without corrosion damage, and the corrosion spot on surface of the tower materail was caused by the corrosion of other metal parts nearby and then the rusting outcome flowed with rain water to its surface.
High-power disc laser welding quality detection based on photoelectric sensing system
Authors: Huang Weiwei , You Deyong , Zhang Yanxi , Gao Xiangdong 
Published: August 2021

Abstract
In order to monitor the quality of laser welding in real time, a photoelectric sensor system is designed, which can collect the light radiation signals of the welding area in real time. The signals are converted into voltage signals by the photoelectric sensor and collected by the data acquisition card. Matlab software is used to analyze the power spectrum of the collected data. It is found that visible light and reflected light have similar power spectrum characteristics through experimental analysis, and the number of peaks and peak frequencies of the power spectrum have an obvious relationship with the quality of the weld. The results show that the detection system can effectively monitor welding defects in real time.
Analysis of virtual fatigue life of welding structure of tracked vehicle based on load spectrum
Authors: Bao Ke , Dai Jin , Liu Yue , Zhang Qing 
Published: August 2021

Abstract
Welding has become the main processing method of the supporting structures on tracked vehicles. The accurate evaluation of fatigue life of welding structures is of great significance significant to the reliability of tracked vehicle. The whole analysis process, based on strengthened load spectrum and structural stress method, is proposed in the study to predict the fatigue life of welding structures. Initially, the road-load spectrum of different conditions was obtained by vehicle tests. Then, the data which had been preprocessed were compressed based on pseudo-damage editing. Furthermore, the load spectrums were extrapolated and equivalent to program-loaded spectra according to the non-parametric rain-flow extrapolation method. On the other hand, the finite element model of the welding structure of the tracked vehicle was established to calculate the structural stress at the welding seam
Wellbore characteristics of air drilling with hammer in thick conglomerate and its influence on hole deviation
Authors: Chen Feng , Huo Yonghao , Zhao Haiyi , Wang Wenchang , Di Qinfeng , Wang Yanmin , Chi Jun 
Published: August 2021

Abstract
Air drilling with hammer is generally recognized as an effective drilling method, but the hole obtained in thick conglomerate formation is very irregular, and the control of hole deviation is very difficult. Although many studies have been carried out, the mechanism of this phenomenon has not been found out yet. In this paper, based on the numerical simulation of rock breaking process of air hammer, the influence of the heterogeneity of conglomerate on the wellbore regularity and hole deviation is analyzed. The results show that the direction of the bit will be changed due to the heterogeneous distribution of gravel particles, which make the wellbore with a severely irregular shape. On this basis, the finite element models of BHA in regular and irregular wellbores are established respectively, and the influence of wellbore irregularity on the stress of BHA is analyzed. It can be found the irregular wellbore is easy to form additional fulcrum, shorten the effective swing distance of pendulum bottom hole assembly. The additional fulcrum greatly changes the mechanical characteristics of the BHA, reducing the angle dropping force on bit, or even produce the angle building force.
Thermal Comfort Analysis of Passenger Compartment of a Hybrid Vehicle
Authors: Feng Jiqi , Yan Tingsong , Zhao Kun 
Published: August 2021

Abstract
The internal environment of the passenger compartment directly affects the mental state of the driver and passengers. The research on the thermal comfort of the passenger compartment has become an important topic in the automotive industry. This paper used computational fluid dynamics method to study the thermal environment of the passenger compartment and the thermal comfort of the human body under different air outlets. Predictive mean vote model and equivalent temperature model were used for calculation. The influence of solar radiation on the velocity and temperature field in the passenger compartment was considered in the simulation process, and the correctness of the simulation results was verified by the cooling performance experiment of air conditioning. The results showed that the position of the air outlet had a great influence on the driver’s thermal comfort. When the air outlet was on the driver’s side, the driver’s thermal comfort was the best.
Sensitivity Analysis of Factors Influencing Accelerometer Hysteresis Based on Morris Screening Method
Authors: Ye Kun , Teng Lin , Li Pengfei , Chen Liang 
Published: August 2021

Abstract
Aiming at the fuzzy cognition of the key process parameters that affect the accelerometer hysteresis performance in the assembly and manufacturing process, a sensitivity analysis method for the influencing factors of accelerometer hysteresis based on Morris screening method was proposed in this paper. Firstly, the assembly and manufacturing process parameters and their range of values of core structure pendulum components are analyzed statistically. Secondly, the mean value and variance of the basic factors of each parameter are obtained based on finite element numerical simulation method. The results show that the bonding Angle between the pad I and the pendulum plate and the bonding Angle between the counterweight and the pendulum plate have the greatest influence on the hysteresis performance of the accelerometer. The interaction between the counterweight and the bonding Angle and other parameters is the most nonlinear.
Research on Sparse Code Multiple Access Technology
Authors: Chen Yujie , Ma Caihong 
Published: August 2021

Abstract
As an important port technology in mobile communication, multiple access can effectively improve the number of user access in the communication system. However, the Orthogonal Multiple Access (OMA) technology has been unable to meet the higher requirements of spectrum efficiency and system capacity in the future, so it is of great practical significance to study and design a new multiple access technology. Sparse Code Multiple Access (SCMA), as a new non-orthogonal multiple Access (NOMA) scheme, improves the number of user access and spectrum utilization by superposition of multi-user information on the same time-frequency resource. And it can well adapt to all kinds of new application scenarios in 5G. This paper introduces SCMA technology from four aspects: basic principle, system model, key technology and its combination with other systems.
Motor brush assembly inspection system based on OpenMV vision technology
Authors: Cong Zhang , Hua Zhang 
Published: August 2021

Abstract
Motor brush assembly inspection is an important link in the industrial field. Traditional quality inspection methods have high errors, poor efficiency and low automation. To this end, the OpenMV machine vision module is used, through the MicroPython language, combined with Canny operator and Hough Transform (Hough Transform, Hough) algorithm. A program is designed to collect the image of the motor brush and process the data by itself. After the actual application in the factory, the detection effect is good, and the accuracy rate is more than 90%, which effectively improves the detection efficiency and meets the real-time quality inspection needs of the motor brushes.
Development of Intelligent Wellhead Platform for Rescue Truck-mounted Drilling Rig
Authors: Li Wangnian , Weng Yinsheng , Li Dongsheng , Wang Hejian 
Published: August 2021

Abstract
In view of the low efficiency of rescuing trapped people in coal mine accidents, the factors affecting rapid drilling are analyzed. Through the modular and intelligent technology of rescue vehicle drilling rig, a kind of intelligent wellhead platform drilling tool is developed. The wellhead platform has the functions of automatic levelling and automatic screwing and unloading of drilling tools, and realizes the efficient centering, clamping and automatic screwing and unloading functions of all kinds of diameter drilling tools. The automatic levelling of the intelligent wellhead platform adopts the closed-loop control strategy, the dynamic automatic levelling of the wellhead platform, and the automatic screwing and unloading device adopts program control, which realizes the automatic unloading of drilling tools with one button. The intelligent wellhead platform can be quickly assembled with the main engine, saving drilling auxiliary time, and is of great significance for underground rescue in coal mines.
Application of Hydraulic Control Make-up and Rreak-up Device in Improvement Design of Drilling rig
Authors: Junjie SHAO 
Published: August 2021

Abstract
Tunnel drilling rig is widely used in coal mine gas drainage, hidden disaster detection and other construction. In view of the serious problem of thread wear when loading and unloading drill pipe thread of underground drilling rig in coal mine, a pure hydraulic control device is developed. By adjusting the corresponding angle parameters of the hydraulic control device, two actions of rotary feeding can be realized, and the thread can be loaded and unloaded automatically according to the thread pitch. The design of the device is completed, and the structure is applied to the improved design of ZDY750L and ZDY2-300LM drilling rigs. The matching control of feed and rotation of the two drilling rigs when loading and unloading the drill pipe is realized, which can reduce the wear of the drill pipe thread when the full hydraulic drilling rig is loading and unloading, and provides a new idea and solution for the implementation of the full hydraulic drilling rig automatic loading and unloading.
Designation and Verification of Manned Spacecraft and Cargo Ship Universal Operating Platform for Vacuum Thermal Test Based on Modular Design
Authors: Zheyang Ge , Runze Wang , Jihui Xie , Zhenyue Ren , Chenwei Hong 
Published: August 2021

Abstract
Before the spacecraft vacuum thermal test, the spacecraft needs to be hoisted into the space environment simulator. Due to the high altitude of the spacecraft, a dedicated operating platform is required. The size of the manned spacecraft and the cargo spacecraft are inconsistent, so the existing operating platforms cannot satisfy the operating requirements of both types of spacecraft. In addition, the existing operating platform has poor structural strength and needs to be assembled in the space environment simulator. In order to solve these problems a universal platform is in proposed. This paper adopts modular design method, using analyzing software for modal analysis, instability analysis and overall lifting analysis. It reduce the maintenance, storage, and transportation costs of the operating platform, improve the assembly efficiency of the operating platform and realize the universal design of the operating platform of the manned spacecraft and the cargo spacecraft.
Design of inspiratory linear die-filling system
Authors: Chen Chao , Zhong WenZhen , Yang Chao , Chai YinFu 
Published: August 2021

Abstract
Powder die-filling is an important process in the process of powder pressing. The effect of mold filling directly affects the subsequent pressing process and ultimately affects the quality of products. During the filling process, the air in the die has an obvious effect on the filling behavior, which seriously reduces the filling efficiency of the powder. Aiming at the influence of air in the process of powder filling, a set of inspiratory linear die-filling system was designed. The system is mainly composed of control module and mechanical module, in which the mechanical module includes two parts: filling device and inhalation device. The iron powder filling trial was carried out by using this system. The movement speed of the shoe was set as 250mm/s. It was found that the filling efficiency of the aspirated filling was improved by nearly 30% compared with that of the gravity filling. The results show that the aspirated die-filling can effectively reduce the influence of air on the powder filling behavior, and improve the filling efficiency of the powder die-filling.
Modal analysis and analysis of motor support based on workbench test bench design of motor dynamic shock absorber
Authors: Wang YueMin , Xu Ke , Zhang Qing 
Published: August 2021

Abstract
This article takes the test bench support (hereinafter referred to as the support) as the research object, analyzes its natural frequency, establishes a three-dimensional model of the support through creo, and uses ansys workbench for modal analysis. The motor is an adjustable-speed motor with a maximum speed of 20000r/s and is fixed on the bracket. The rotation excitation frequency of the motor and the natural frequency of the bracket will form resonance in the first 10 steps, so a damping shock absorber is designed to transfer the vibration on the motor to the vibration reduction device, so as to achieve the purpose of eliminating vibration.
Research on Application of Transfer Learning in Equipment Fault Diagnosis
Authors: Tian Xue , Dinghai Wu , Huaiguang Wang 
Published: August 2021

AbstractIn view of the complex and changeable operating conditions of equipment, and the different distribution of measured data, it is difficult to promote the application of fault diagnosis technology. Many scholars have introduced transfer learning to overcome the lack of training data for deep learning by transferring existing data and models in similar domains into the target domain, it has expanded the application of fault diagnosis technology. This paper introduces the related concepts of transfer learning, summarizes the current applications and existing problems of transfer learning in the field of fault diagnosis, and finally puts forward further research directions and suggestions in general detection, real-time detection, etc. The purpose is to better improve equipment support capabilities.
Design of a fully automatic intelligent cooking robot
Authors: zhang Jianbao , Bao Shiping , Luo Bing 
Published: August 2021

Abstract
With the rapid development of Internet of things artificial intelligence, people’s life becomes more and more convenient. Intelligent frying machine has been favored by consumers because of its advantages of saving time and saving time. However, most of the existing market fry machines have the disadvantages of low automation, low quality and complicated operation, but they have not been widely promoted. Therefore, this paper designs an intelligent cooking robot with full automatic, high intelligence and convenient operation. It is based on the Internet of things information technology, and improves the structure, circuit, software and user experience in all aspects. It has the functions of automatic weighing of food materials, intelligent recipe generation, intelligent seasoning precise addition, automatic cooking, voice interaction and other functions. It realizes the full automation, precision and intelligence of the cooking process, and the user experience is good.
Safety risk analysis of Home Automation products
Authors: Luo Hongqi , Liu Xia , Wang Po 
Published: August 2021

Abstract
Home Automation can provide people with safe and comfortable living environment, but due to the defects of related equipment and support technology at different levels, the safety accidents of Home Automation products occur from time to time. By analyzing the composition of Home Automation system, the characteristics of each subsystem and the existing security risks, the risk relationship of each subsystem is analyzed. The risk research status of Home Automation products at home and abroad and the status of standard formulation and revision are compared, so as to provide support for the corresponding theoretical analysis and practical application.
Design and Development of Welding Data Processing System
Authors: Wang Laizhen , Long Bin , Duan Ruibin , Wang Kekuan , Lv Li 
Published: August 2021

Abstract
Through database technology, welding data management technology and automatic analysis storage technology, a management system for welding process monitoring is designed and developed in C# environment, which realizes the integrated automatic management of real-time analysis, processing, storage and uploading of welding data; at the same time, it can make statistical analysis of historical data and generate reports. In addition, the system also has scalability, which provides technical support for the construction of “intelligent pipeline and smart pipe network” in the future.
A stress amplification model to evaluate the stress concentration of tool joint under complex loads
Authors: Chen Feng , Zhao Haiyi , Huo Yonghao , Di Qinfeng , Wang Wenchang , Zhou Xing 
Published: August 2021

Abstract
The more and more severe drilling conditions make the load conditions of tool joint extremely complex. Under the complex load conditions, the stress concentration of tool joint is serious, so failure of tool joint often occur in the oilfield. However, few researchers have studied the stress concentration of tool joint under complex loads. In this paper, the stress distribution of an API tool joint, NC38, was analyzed with 3D elastic-plastic finite element method under complex loads. The stress concentration factors of the tool joint were calculated, and the influence of tensile and bending load on it was analyzed in detail. The results show that the existing model cannot effectively reflect the fact that the stress concentration of tool joint will increase with large tensile load in the crooked hole section. Based on the 3D finite element analysis, a stress amplification model is proposed and used to reflect the failure risk of tool joints under the combined action of axial tension and bending moment. The results show that this model is consistent with the fact that the failure risk of tool joint will increase with large tensile load in the crooked hole section.
Repairability Evaluation of Retired Hot Forging Die Based on Matter-Element Extension Model
Authors: Bin Chen 
Published: August 2021

Abstract
Hot forging die is one of the important tools for machining. Because of its bad working environment, it is prone to lose its effect. Repairing the retired hot forging die can reduce the production cost and prolong the service life of the die, which has good economic benefits. In view of the complexity and uncertainty of hot forging die repair process, and the complexity and uncertainty of hot forging die repair process, this paper constructed the evaluation indexes of technical feasibility, economic feasibility, environmental feasibility, life-span feasibility and time-effectiveness feasibility, and comprehensively uses AHP and matter-element extension model to evaluate the repairability of retired hot forging dies. The rationality of this method was verified by the repairability evaluation of the hot forging die of a retired automobile steering knuckle.
Research on Multi-Agent Modeling Method of Space Based Network Information System
Authors: Lai Jiazhe , Yu Haoze , Zhang Zhening 
Published: August 2021

Abstract
Space based information network system is a network system composed of spacecraft and spacecraft, which plays an immeasurable role in commercial and military, so it is very important to carry out simulation research on it. In this paper, the idea of Multi-Agent modeling is applied to study the simulation modeling of space-based network information system. This paper first introduces the space-based network information architecture, Multi-Agent system and RepastHPC, a Multi-Agent high-performance computing simulation toolbox. The simulation example is Starlink’s information support capability under AIM-260 “A aims and directs B to strike” fire attack mode, and the process of message Starlink transmission is mainly studied. In this paper, the space-based network information system is abstracted into route agent and sat agent, the decision-making method is given for each behavior, and a feasible Multi-Agent system is established. The simulation experiment of information transmission is carried out on RepastHPC platform, and the feasibility of applying Multi-Agent system to space-based network information system is verified.
Numerical Simulation of Optimizing Plating Uniformity of Interconnect Circuits on Printed Circuit Boards
Authors: Xiang Jing , Chen Panfeng , Wang Yingjie , Zeng Chong , Yang Wenyao , Li Jie , Xu Yonggang 
Published: August 2021

Abstract
Based on the finite element method, the interconnection circuit models with different pattern designs were established and plating copper circuits were simulated to obtain the plating uniformity. Meanwhile, the influence of insulating shield, auxiliary cathode and the distance between anode and cathode (DAC) on the plating uniformity is studied to provide theoretical guidance for improving the uniformity of electroplating copper at actual production. Compared with other pattern designs, the circuit with a pattern design area ratio of 20% has the best plating uniformity under the initial conditions. The increase in the auxiliary cathode width and the decrease the aperture of insulating shield and DAC can improve the electroplating uniformity of circuit.