bluuebunny/crossref_metadata_2025_split huggingface dataset:
Roadside Unit Deployment of Cooperative Vehicle-Infrastructure System Based on Digital Measurable Image Method
Authors: Liu Jianping , Cai Lei , Wang Xinke , Lyu Chenyang , Zhang Li 
Published: November 2020

Abstract
As the trend of the new generation of intelligent transportation systems, the application of the cooperative vehicle-infrastructure system (CVIS) is important to reduce traffic congestion and accidents. For the cooperative vehicle-infrastructure system, the roadside unit (RSU) is a new application without enough deployment experience. Meanwhile the deployment of traditional mechanical and electrical infrastructure is generally based on experience and is easy to change the design. This paper analyzes the key technical parameters of RSU and the Digital Measurable Image (DMI) method in context of the CVIS. After collecting field data from a smart highway pilot project (the Deqing-Fuyang expanded Huzhou section in Chang-Shen Highway) and matching the DMI method with highway mileage pile numbers, an RSU deployment scheme based on DMI data was completed. It provides significant support for smart highway demonstration projects with cooperative vehicle-infrastructure intelligent management and control applications.
Development of Parametric Design Software for Shearer Spiral Drum
Authors: Huang Qiulai , Tang Qi , Jia Tengfei , Liu Changli 
Published: November 2020

Abstract
In order to improve the design efficiency of the shearer drum and achieve rapid optimization, it is proposed to establish a parametric design system for the shearer spiral drum centered on design, optimization system and parametric modeling technology. The overall idea of implementing the system, the function and design analysis of each module are expounded, and the key technologies are discussed. Using Solidworks as the platform, the parametric design of the shearer spiral drum was developed with VB.Net, including the modification of the drum size, the automatic drawing of the cutting diagram, the load calculation of the pick and the automatic generation of the loading blade parts and their unfolding engineering drawings. Finally, it was verified with a 1800x630 roller. Tests prove that the system can quickly optimize the shearer drum, improve the speed and accuracy of drum development, and reduce costs.
Study on Evaluation Method of System Efficiency of Pumping Wells
Authors: Xie Wei , Chen Lei , Wang Fang , Li Yun , Yang Mengshi , Wang Lin , Xia Zhixue , Wei Haiyan , Gao Hongchao , Wang Bin 
Published: November 2020

Abstract
For a long time, there is no unified method and standard for efficiency analysis and evaluation index of pumping well system. Therefore, this paper studies the theoretical extreme value of pumping well system efficiency. Based on the model of system efficiency evaluation method, the single factor analysis and comprehensive impact analysis are carried out, and a set of simple and convenient evaluation method of pumping well system efficiency is found out by using examples. It provides strong technical support for relevant technical departments and different oil production units to reasonably formulate measures and plans.
Research on the Health Intelligent Management System of Large Wind Tunnel
Authors: Zhang Hao , Liu Zongzheng , Liao Wenlin , Chen Xiaoguang , Chen Zhenhua 
Published: November 2020

Abstract
In the national major projects, health management of key infrastructure has been paid more and more attention. Wind tunnel is a national strategic infrastructure. The health management system is of great significance to promote the safe, efficient and reliable operation of large-scale wind tunnel. In order to establish a wind tunnel health intelligent management system, it is necessary to realize the dynamic state monitoring, intelligent fault diagnosis, intelligent fault prediction, independent maintenance support and integrated equipment management. Facing the great demand of designing and constructing the world’s top wind tunnels, this paper makes an exploratory research on the health intelligent management system of large wind tunnel. By means of data mining, machine learning and virtual reality, the health management system can have the ability of self-study and self-improvement. So as to realize the development of the health management of wind tunnel to the depth intelligent.
Experimental Study on Local Heat Transfer during Quenching Process by Slot Nozzles
Authors: Jiang Peng , Wu Licheng 
Published: November 2020

Abstract
Quenching is widely used in industrial applications. The heat is transferred from the ingots by spray or jet cooling at the secondary cooling zone. In this research work, the effort is focused on the influence of jet inclination on heat transfer in the boiling process, as well as the influence of heat transfer rate by changing the jet velocity through experimental work using Nicrofer sample under 850 ˚C. Different angles of the jet (25°, 45°, 65°, 90°) and flow velocities (3.5 m/s, 4.8 m/s, 7.8 m/s, 12.0 m/s) were arranged in these experiments respectively. The results indicated that due to the strong cooling effect of jet quenching the Leidenfrost point was not captured. Both the jet angle and jet velocity played important roles in promoting the cooling process. The smaller the jet angle, the faster the quenching rate. The angle of 25° presented the most optimum cooling effect. The higher the jet velocity, the shorter the cooling time. For the maximum jet velocity in this experiment v=12.0m/s, DNB-temperature even was not identified.
Experimental Performance Research of Vertical Axis Wind Turbine with Expandable Airfoil
Authors: Shen Junjie , Tang Zhipeng , Yan Wuseng , Chen Peng , Zhao Xingyu , Dong Hongkai , Li Wuhao , Zhang Changcun 
Published: November 2020

Abstract
In order to improve the wind energy utilization of the vertical axis wind turbine (VAWT), a new type of VAWT with expandable NACA0012 airfoil is proposed in this paper. The airfoil has opening and folding state. The airfoil is open in windward which is similar with curved blade in Savonius tubine. And it is folded in leeward which is similar with airfoil in H-type turbine. In this paper, a wind tunnel test system is designed to measure the aerodynamic performance of the new turbine and three main structural parameters of the turbine are analyzed. The structural parameters contain the maximum unilateral open angle which influence the flatten of the blade and the sweep wind area. The revolution angle of the rotor corresponding to the self-rotation open angle which influence the effective working time and the airfoil self-rotation effect on the turbine rotation. And the revolution angle of the rotor corresponding to the self-rotation folded angle of the airfoil which influence the wind resistance and impact on the turbine in rapid folding process. The results show that the maximum wind energy utilization of new turbine with appropriate airfoil structural parameters and tip speed ratio corresponding maximum wind energy utilization is higher than Savonius turbine which means the performance of the new turbine capturing wind power is better than Savonius turbine and can be more suitably used in areas with relatively barren wind resource.
Research on Verifying the Accuracy of Finite Element Analysis on the Steel Strips of Boneless Wipers
Authors: Han Bin , Xia Jianrong , Li Jun , Hu Qianjin , Chen Hongyan 
Published: November 2020

Abstract
In order to verify the accuracy of finite element method for detecting the strain distribution trend on steel strips of boneless wipers, a series of measures were taken. The strain values of eight points evenly distributed on the upper surface of a steel strip were measured experimentally. A finite element analysis of the model of a steel strip was performed using ANSYS 18.0 to obtain the strain values of these eight points. Comparing the simulated strain values with the experimental measurements, it is found that the distribution trends of two is consistent, but the simulated strain value of each point is much smaller than the experimental measurement. The reason for this error is that the influence of the self-gravity of a steel strip in the experiment was not eliminated. In future research, the experimental method should be improved to eliminate the influence of the self-gravity of steel strips on the experiment.
Mechanism and Optimization of Pilling Propensity of Wool Fabric Drying in Dryer
Authors: Wei Yuhui , Su Zhaowei , Wang Zongqian , Yuan Huifen , Li Changlong 
Published: November 2020

Abstract
In order to explore the pilling mechanism of fabrics drying in domestic dryers, the pilling propensity and surface morphology of wool fabrics after drying were intensively investigated and compared under different rotating-drying models with help of pilling box and Scanning Electron Microscope (SEM). Results showed the pilling mechanism of wool fabric drying in dryer is not temperature mechanism but rotating-drying models (mechanical movement models of drum) mechanisms. Therefore, the model of alternating clockwise and counterclockwise rotating-drying in dryer should be regarded as appealing rotating-drying model for the wool fabrics drying in dryer.
Research on Coordinate Conversion and Error Analysis of BLSS-PE
Authors: Yu Lewen , Zhan Kai , Zhang Da 
Published: November 2020

Abstract
In this paper, a 3D laser scanner for mining named BLSS-PE is proposed, based on a commercial rangefinder with two servo motors. The coordinate transformation model in different coordinate systems is put forward and the model solving strategy is given. By establishing the error model of BLSS-PE and comparing the measurement data, the results show that the accuracy of BLSS-PE data can be improved after the external factors are included in the system error model, which verifies the feasibility and correctness of the optimization model.
Research on the Simulation Process for the CFETR Divertor Assembly in Delmia
Authors: Dai Huaichu , Lv Gang , Huang Wenjin , Qin Qiang 
Published: November 2020

Abstract
Divertor is an important inner component for Tokamak. In the conceptual design stage, the divertor should be assembled according to the design process in order to guide the work in site. Inner and outer targets, Dome, cassette body are studied in terms of their assemble process to validate the assembly process. Besides, Inner and outer targets and Dome are connected to the cassette body to form the whole divertor model in Delmia. Therefore, it is feasible to do assembly simulation in the virtual environment.
A Design of Lightweight Walking-Assisted Skeletal Robot
Authors: Zhang Lin , Liu Xingchen , Xia Haishan 
Published: November 2020

Abstract
At present, the robot is in a full swing state in various industries, and intelligent equipment can be seen everywhere. With the development of science and technology, the intelligence, reliability and functional extensibility of the exoskeleton robot have to be further improved. Most of the robots sold in the existing market are service robots, domestic robots, and so on, while walking-assisted robots are few. Taking into account the above mentioned, this project is committed to the design and improvement of a lightweight walking-assisted skeletal robot which is composed of STM32 controller, sensor detection, feedback module, action module, mobile APP client and other units. It can identify the step width and pace to the STM32 data, through the gait and stability analysis, real-time adjustment of transmission device to drive the bone mechanical body, help the old man and the security of the disabled to walk. The system could be used for different operating modes of the pressure, acceleration, the heart rate and other non electrical parameter detection and processing.
Simulation Optimization Design of Set Parts Supply System for Automobile Assembly Line
Authors: Chen Xuehong , Zhu Haiping , Guan Hui 
Published: November 2020

Abstract
This article studies material distribution system of mixed-model assembly line. A new material distribution model, set parts supply (SPS) system, is applied to a practical automobile assembly line (S Company) with a takt time of 80s. Firstly, Plant Simulation is used to build the material assembly system simulation model. For the distribution area subsystem, to maximize picking efficiency, material layout and task allocation plan of distribution area are obtained through simulation combined with genetic algorithm with two-chromosome expansion coding mode. As for material transporting subsystem, Design of Experiment (DOE) method based on simulation model is used to achieve the optimization of system parameters such as number of AGVs, capacity of buffer and so on.
Research on Key Strategies of Green Design and Manufacturing Based on Valve
Authors: Xu Yong 
Published: November 2020

Abstract
The paper analyzes the existing problems about low design efficiency and reliability, poor interchangeability and high resource consumption in the design and manufacture of valve industry, designed a set of green planning,green design and manufacturing scheme based on the key technology of green design and manufacturing, such as network and big data platform,provides the maneuverable idea of sustainable development for valve industry.
Research and Application of “Rhythm and Rhyme” in the Modelling Design on Agricultural Machinery Product
Authors: Chen Wei 
Published: November 2020

Abstract
Nature gives rhythm and rhythm to farmland and crops. Then, as agricultural machinery products serving agriculture, its modelling design should also adapt to the nature of nature, fully embodies the “rhythm and rhyme” aesthetic feeling, harmonious in nature. In the modelling design of agricultural machinery products, rhythm and rhyme are often used to obtain the aesthetic feeling of machine modelling. Due to the structure and function of agricultural products, design often emphasizes the rhythm and rhyme of the repeated side
A Study on Fault Diagnosis of Rotating Machinery Combined Wavelet Transform with VMD
Authors: Zhou Huan , Wang Hao 
Published: November 2020

Abstract
Effective diagnosis of rotating machinery is difficult in view of the complex structure, weak early fault signals, non-stationary and non-linear vibration signals, and low signal-to-noise ratio. In this paper, a fault diagnosis method is proposed based on particle swarm optimization (PSO) and variational modal decomposition (VMD). Firstly, wavelet packet threshold is denoised on the signal, VMD is decomposed on the reconstructed signal, and PSO is optimized on the inherent mode function (IMF) obtained from decomposition so as to determine the best IMF function. Then Hilbert transform and envelope spectrum analysis are carried out on the IMF function, and the envelope spectrum analysis result is compared with theoretical calculation frequency to finally determine the fault type. The results indicate that this method can effectively reduce noise components in signals, extract weak fault information and realize fault diagnosis.
The Development Trend of Internal Combustion Engine
Authors: Wang Zhibin , Pan Xiaobing , Zhang Wei , Zhao Yu , Li Haiming , Liu Peng 
Published: November 2020

Abstract
With the development of internal combustion engine technology, internal combustion engine has been widely used in automobile, ship, electric power and other industries due to its advantages of high power density, high heat utilization rate and good economic performance. This paper analysed the advantages, the development process and current situation of internal combustion engine technology, while the development trend of internal combustion engine technology is prospected. Internal combustion engine technology will get greater development in the future.
The Design of Receiver with Low Complexity for PDMA System
Authors: Tang Wanwei , Fu Xueqian , Kang Shaoli , Zhao Jinlong , Ma Zhuang , Wang Lixia , Zhang Xiurong 
Published: November 2020

Abstract
As one of promising non-orthogonal multiple access scheme, pattern division multiple access (PDMA) scheme is considered to be one competitive multiple access technology for the fifth generation (5G) communications. The detection algorithm is the key technology to improve the system performance. Due to the PDMA patterns sparse nature, belief propagation (BP) become one effective receiver algorithm to achieve close to maximum likelihood (ML) detection performance with lower complexity. However, the complexity order is still exponential with the row weight of the PDMA pattern and the modulation index. A novel receiver based on expectation propagation (EP) algorithm is proposed in this paper to reduce the complexity order from exponential to linear. This paper makes a comparison on the two algorithms above in terms of system performance and complexity. Link-level simulation results show that the proposed EP receiver achieves nearly the same performance as the BP receiver with orders less complexity.
Design of A GIS Pipeline Robot for 220KV Substation
Authors: Li Wensheng , Jiang Zhipeng , Zhong Liqiang 
Published: November 2020

Abstract
As an important development direction of substation equipment, a large number of GIS equipment are installed in the power system. Once the GIS equipment has internal faults, it is very inconvenient to find and deal with. This article designs a miniature maintenance robot for GIS equipment, which can be put into the busbar be through the GIS equipment maintenance hand hole cover; the robot has the ability to walk in the GIS equipment busbar tube; the robot carries a small camera device, which can check internal problems and return images; The robot is equipped with a manipulator, with vacuuming and grasping functions, which can complete simple cleaning and bolt tightening operations.
Design of a H∞ Robust Controller for a Small UAV
Authors: Chen Xiaoyan , Dong Chaoyi 
Published: November 2020

Abstract
For Small Unmanned Aerial Vehicles (SUAV), because of its wide flight envelope and its own flight control system has many uncertainties, the aircraft itself is also vulnerable to strong interference such as atmospheric turbulence, so a robust controller is required to meet the specific performance requirements. In this work, a H∞ algorithm, based on a Linear Matrix Inequality (LMI), is used to the design of multivariable flight control system for the longitudinal motion mathematical model of a SUAV in a key laboratory. The simulation result demonstrated that the control system cannot only guarantee the stability of the closed-loop, but also has good robustness for internal and external disturbances.
Dynamics Analysis of Carrier-based UAVs with Ski-jump Launch
Authors: Li Jixin , Liu Tao , Guo Hengguang 
Published: November 2020

Abstract
Sinking has a direct influence on launch safety of carrier-based UAVs, occurred just while leaving carrier board caused of disappearance of ground effect. A dynamics model of an UAV was developed and some mechanical and dynamics analysis were given out to build its dynamics simulation model of ski-jump launch. Based on the simulation results, some important parameters were analyzed, such as trace, velocity and loadings of landing gears. By changing the values of engine thrust and mass of the UAV, it was validated that decreasing the mass properly or increasing thrust would reduce the sinking and improve launch trace to make it safer.
Research on Development of Vehicle Chassis Dynamometer
Authors: Zhang Xiaorui , Zhou Zhili 
Published: November 2020

Abstract
Vehicle chassis dynamometer, as an important part of vehicle test equipment, plays an important role in the research and development of the vehicle’s entire life cycle. The development history of vehicle chassis dynamometer from hydraulic dynamometer to AC dynamometer was reviewed, and it was proposed that AC chassis dynamometer has become the mainstream trend. The vehicle chassis dynamometer was further discussed from the aspects of measurement and control system and road simulation system. On the basis of the current research status of dynamometers, based on the virtual test technology, network, intelligence and function expansion, the development direction and research focus of vehicle chassis dynamometers are given to provide reference for the further development of vehicle chassis dynamometers.
Bridge Damage Detection and Recognition Based on Deep Learning
Authors: Chen Xiuxin , Ye Yang , Zhang Xue , Yu Chongchong 
Published: November 2020

Abstract
Bridge damage detection is of vital importance to bridge safety. Nowadays the damage detection is mainly performed by human which is inefficient. We pro-posed a bridge damage detection and recognition method based on deep learning which is named DT-YOLOv3 in this paper. Our method is based on YOLOv3 object detection method and several improvements were made. First, deformable convolution was used to extract more accurate features, and transfer learning was introduced to improve the detection accuracy. Then, the model was compressed using group convolution and pruning. The test results show that our method is more effective than state-of-the-art methods and costs less time.
Development and Research Status of Road Cleaning Vehicle
Authors: Xu Heqing , Xiao Jixue , Feng Yu 
Published: November 2020

Abstract
Road cleaning vehicle is efficient cleaning equipment. It integrates road cleaning, garbage recycling and removing. This paper introduces the research background of road cleaning vehicles briefly. Then it summarizes the representative products of road cleaning vehicles, and analyzes the current status of technology development. At present, the multifunctional cleaning car on the market has the functions of suction and sweeping combination, no need to spray water, dust suppression, full filtration, purification and emission. Some companies even integrate advanced technologies such as automatic driving and intelligent identification. Finally, it predicts that the road cleaning vehicle will be developed in intelligence and environmental protection.
Research on the Innovation of Additive Manufacturing Technology in Contemporary Industry Development
Authors: Ma Xueliang 
Published: November 2020

Abstract
Additive manufacturing technology has entered our daily life, seemingly omnipotent. At the same time, a considerable proportion of scholars believe that this technology can not replace the traditional manufacturing industry. How to promote the development of additive manufacturing technology and make it meet the market demand quickly is the purpose of this study. This paper analyzes the problems of additive manufacturing technology from the aspects of “technology readiness index”, “driving force and bottleneck”, “innovation demand” and “obstacles to commercial promotion”, and puts forward solutions.