bluuebunny/crossref_metadata_2025_split huggingface dataset:
Super-Resolution Reconstruction of Single Image based on Multiscale Recursive Residual Network
Authors: Dong Mi , Huang Jian 
Published: March 2020

Abstract
In order to solve the problems of single image super-resolution algorithm based on convolutional neural network, such as shallow network structure, single feature extraction scale and fuzzy texture of reconstructed image, a single image super-resolution reconstruction method based on multi-scale convolutional neural network is proposed. The convolution of several different scales is used to check the original low-resolution image for feature detail extraction, and the recurrent residual network is used to gradually restore the high-frequency information of the image with fewer parameters. Finally, the final reconstructed image is obtained by fusion of the features extracted by different convolutional kernels. The experimental results show that the algorithm proposed in this paper has obtained better image super-resolution result, can obtain more detailed information, and get better visual effect. The classical reconstruction methods such as bicubic, SRCNN, FSRCNN, ESPCN, VDSR are compared, and the peak signal-to-noise ratio (PSNR) and the structure similarity (SSIM) are higher than that of the existing algorithms.
Bus-Protection Device-Tank-type Vehicle System Collision Research
Authors: Zhang Guosheng , Zheng Haiyang , Chen Ye , Liu Hongli 
Published: March 2020

Abstract
Aiming at the problem of insufficient protective performance of the rear protection device, a new type of rear protection device with high protective performance is proposed and designed. A new type of tank-type vehicle rear protection device is used to establish the collision environment of bus- protection devices- tank-type vehicle system collision, and the dynamic response characteristics of the collision system were simulated and analyzed. The safety of the rear protection device was analyzed and evaluated by the real bus impacting tank-type vehicle, and compared with the simulation results. The research result shows that the protective performance of the square tube protection device is effective.
Research on Energy Absorption Characteristics of Protective Devices with Different Wall Thickness Structures
Authors: Zhang Guosheng , Wang Chunhui , Chen Ye , Du Linsen 
Published: March 2020

Abstract
As square tube type protective device as the object, selected on the basis of the results of the simulation test, design the crossbar and arm structure plan of the six groups of different wall thickness. Through bus rear-ended dangerous goods transport vehicle simulation test way, analyzes the deformation and energy absorption about the bus and six groups of protective device which has different wall thickness. Research results show that the main energy absorption part of square tube type protective device is the arm structure. The optimal design scheme is when the wall thickness of the arm is 4 mm and the wall thickness of the crossbar is 3 mm.
Simulation calculation of the effects of seal face width on mechanical seal performance
Authors: Wei Long , Fang Guifang , Zhang Penggao 
Published: March 2020

Abstract
In order to research and master the effects of seal face width on mechanical seal performance, based on the fractal models of average temperature, friction coefficient and leakage rate of seal faces, the influencing factors of seal face width on mechanical seal performance were analyzed by simulation calculation. The calculation results show that the average temperature of seal faces increased approximately linearly, the friction coefficient and leakage rate of seal faces decreased with the increasing seal face width. The decrease amplitudes of friction coefficient and leakage rate became smaller with the increasing seal face width. The effect degrees of seal face width on friction coefficient and leakage rate increased with the increasing sealed fluid pressure. The change of seal face width has little effect on leakage rate when the sealed fluid pressure was low.
Virtual Sample analysis of concomitance fork’s stability and passing capacity
Authors: Yue Jing-Tao , Tang Li 
Published: March 2020

Abstract
Based on such factors as positioning parameters, quality characteristics, stiffness and damping of suspension, steering train, drive train and tire, a multiple-body dynamics model of 14 DOF for one accompanying forklift is established with the 3D models and ADAMS software. In view of the driving environments of classified highways and fourth-class roads, four parameters including the speed, tilt stabilization angle, vertical tilt stability angle and channel width of the accompanying forklift are calculated, and high-speed driving stability and channel pass ability are analyzed and predicted during the design stage. The analysis results are useful for the design optimization of the traction rod and can provide a theoretical basis for the development of similar products.
Research on Classification Method of Vehicle Body Surface Defects Based on BP Neural Network
Authors: Wang Xing , Wu Mingming , Zhou Jinxia , Wang Jianguo 
Published: March 2020

Abstract
In order to classify the surface defects of the vehicle body, a classification method based on BP (back propagation) neural network is proposed. According to the characteristics of vehicle body defects, the gray, morphological and geometric features of various defects were extracted, and the defect feature database was established. The defect classifier was designed by using improved BP neural network algorithm. The experimental results show that the method is very feasible and effective in the identification of vehicle body defects.
Thermohydrodynamic performance of water-lubricated thrust bearing of mine high speed rescue pump
Authors: Bai Yuxing , Pan Bo , Shen Yong 
Published: March 2020

Abstract
In order to meet the requirement of axial force balance of mine rescue pump with high speed and big power, the capacity and reliability of water-lubricated thrust bearing of the pump unit should be improved. This paper presented a study on the capacity of water film and bearing bush deformation of water-lubricated thrust bearing based on the change of temperature in the motor chamber, which is under the actual operation condition of mine high speed rescue pump. In this study, the Reynolds equation was solved by MATLAB to get the thickness of water film, and the deformation of bearing bush was obtained through the joint solution of heat-fluid-solid coupling equation by ANSYS. The results show that the temperatures have little effect on the pressure distribution of water film and the deformation distribution of bearing bush. However, the maximum pressure of water film increases with the temperature. The research of the paper could provide theoretical support and technical guidance for the design of water-lubricated thrust bearings under big power and high speed conditions in the future.
Design of spraying robot end actuator and experimental study on motion trajectory simulation
Authors: Zhang Chen , Xu Xuewu , Wang Guoping , Men Jing 
Published: March 2020

Abstract
This paper aims to design the end actuator of the spraying robot for the six-axis industrial robot with the GSK RB08 as an example, and carry out the planning and simulation of the end trajectory of the painting robot, and verify its effectiveness and feasibility. Firstly, based on the end size and technical parameters of the GSK RB08 robot flange, the structure of the end actuator is designed in combination with the spray gun installation size. Secondly, based on the NURBS interpolation algorithm, the industrial robot spray path is planned by UG and imported into RobotAssist for 3D simulation; Finally, the end actuator is physically installed and debugged. The planning path is imported into the GSK RB08 robot to demonstrate the effectiveness of the end actuator and the planned spray path, providing a solution for the optimization of the spray path.
FANUC CNC vertical machining center “EX1016 - Low Air Pressure” fault diagnosis
Authors: Ai Cunjin , Cao Chuanchuan , Li Wen jiang , Yang Dakui 
Published: March 2020

Abstract
In this paper, the “EX1016 - low air pressure” alarm that occurs in the VDF-850 vertical machining center (FANUC-0i-Mate-MD system) produced by Dalian Dalian Machine Tool Factory causes the machine to fail to start the cycle as an example, and describes the generation of air pressure. Low working principle, troubleshooting method, modification of PMC ladder diagram, etc., and timely troubleshooting, to ensure normal teaching and production.
Corrosion resistance of optical diamond-like carbon film
Authors: Wang Shuyun , Liu Xu , Liu Yi , Zhang Weixin , Lu Yimin 
Published: March 2020

Abstract
KrF laser and Ti:Sapphire femto-second laser were used to deposit diamond-like carbon(DLC) films on silicon substrates which were double polished. Optical transmittance and corrosion resistance of these samples were compared. The transmittance of DLC film sample which was deposited by Ti:Sapphire laser in oxygen atmosphere was higher than the sample which was deposited by KrF laser in vacuum. Both samples could pass the salt solubility test and salt fog test. But when dipped in NaOH liquor, the result showed that surface of the sample deposited by Ti:Sapphire laser in oxygen atmosphere appeared corrosive spots first. Reasons were analyzed according to corrosive mechanism.
Application of Selective Laser Melting Technology Based on Titanium Alloy in Aerospace Products
Authors: Jing Li-li , Li yu-hua , Cheng Ke wei , Wang Feng , Shi Jin Wen 
Published: March 2020

Abstract
Selective laser melting (SLM) is a key technology for direct forming of metal parts in 3D printing technology. SLM technology can realize the direct forming of parts with complex shape, high dimensional accuracy and excellent mechanical properties. It is especially suitable for rapid manufacturing of personalized and customized structures of aerospace difficult-to-machine parts. SLM forming process involves complex physical and chemical behavior of materials. Forming mechanism is quite different from traditional casting processes. The process parameters are complex and difficult to control. In this paper, a set of SLM forming process parameters suitable for Ti6Al4V alloy has been explored through the development of a SLM forming equipment of ESO M290 in Germany. The innovation of this product application design is the SLM printing design and process of minimal size dual-antenna, and the process method and design idea are universal. SLM forming technology based on Ti6Al4V alloy will be more and more widely used in aerospace field.
Electric Field Simulation Analysis and Insulation Structure Optimization of Transformer Elevating Seat
Authors: Zhou Junfeng , Wang Shuo , Peng Chong , Wang Ning , Wang Kang , Zhu Tiantong 
Published: March 2020

Abstract
During long-term operation, impurities and moisture in insulation oil would be absorbed by supporting parts in the elevating seat, which would reduce its insulation strength and leaded to partial discharge. In order to analyse the changing effect of the introduction of supporting parts on long oil gap E-field and optimize the insulation structure, based on the 500kV transformer, FEM was used to calculate the distribution of electric field in elevating seat, the equalizing ball shape was designed and optimized, the influence of elevating seat diameter on the lead surface maximum E-field was analysed. The results showed that after structural optimization, the maximum E-field on lead surface near supporting parts decreased from 8.95kV/mm to 7.82kV/mm, and on the equalizing ball surface decreased from 6.20kV/mm to 5.34kV/mm, with a decrease of 12.63% and 13.87% respectively, which improved the safety and reliability of transformer operation.
Preparation and Study of Properties of Polyhydric Alcohols Biphosphate Ethanolamine Salt
Authors: Wei Jiang , Jinfeng Li , Ziyuan Li , Jie Chen , Xiaoyan Zhang 
Published: March 2020

Abstract
A new type of halogen-free flame retardant has been synthesized with raw materials of Di(trimethylolpropane) and phosphorus oxychloride, and the influence of the raw material ratio, reaction temperature and reaction time on the yield has been discussed. It has been shown in the results that the molar ratio of Di(trimethylolpropane) and phosphorus oxychloride is 1:4, the reaction temperature is 80°C, the reaction time is 4 hours, the intermediates have the highest yield. Furthermore, the flame-retardant effect and thermal stability of the target product on different fabrics have been investigated, and the structures of the intermediates and the target products were characterized by Fourier transform infrared spectrometer.
Reliability Assessment on Typical Connection Modes of High Reliability Demonstration Area
Authors: Kang Wei , Hu Po , Gao Shan , Zhao Yang , Wang Zijun 
Published: March 2020

Abstract
In the process of construction and modification of distribution, choosing connection modes is a key link of network construction and plays a pivotal role in distribution network. In this thesis, firstly, the distribution network frame and its present situation in demonstration area is analyzed, and the shortcomings in present network are designed; After using the features of advanced distribution network frame in international metropolis for reference, the experience is concluded and four kinds typical connection modes which suit for demonstration area are designed; The characteristics and the scope of application of every typical connection modes are analyzed, the modification scheme according to the present distribution network frame in demonstration area is illustrated. Finally, the examples are taken as cases to illustrate that these typical connection modes are of high power supply reliability. With the constant rise of the require of power supply reliability, the connection modes in demonstration area will be widely used and extended gradually.
Study on Structure Optimization Design for Outrigger of In-situ Slewing Device
Authors: Jiang Huifu , Zhang Guosheng , Zhang Jiaxing , Zhang Linbo 
Published: March 2020

Abstract
To solve the problem of insufficient turning radius for heavy-duty wreckers in narrow and congested road environment, this paper designed a new type of in-situ slewing device, and conducted a finite element simulation analysis on it. On this basis, by combining the optimization theory, this paper further optimized the structure of in-situ slewing device by using three different optimization design methods, including screening method, nonlinear second-order Lagrange method and quadratic integer sequence algorithm. The total weight loss of outrigger structure was 69.96 kilogram, the weight-loss ratio is equal to 7.34%. These results prove that the goal of structural optimization design has been achieved.
Damage Diagnosis of Top Tensioned Riser Based on Strain Response
Authors: Ni Lingying , Sun Yu , Liu Zhihui 
Published: March 2020

Abstract
Strain has a high sensitivity to structural damage and can be used for damage diagnosis of marine risers in engineering. Considering the structure and boundary conditions of the top tensioned riser, it can be simplified to the Euler-Bernoulli beam element, and the strain equation on the riser wall is derived. The element Root-Mean-Squared Strain(RMSS) difference is proposed as the damage index parameter of the riser. The finite element software ANSYS is used to simulate the element strain response of the 1000m length top tensioned riser in the South China Sea with different damage locations, damage degree and sea state parameters, and the RMSS difference curve is drawn. The results show that the RMSS difference has high sensitivity to the riser structure damage, and the damage position of the riser can be effectively identified in many different situations.
Analytical Solution of Eddy Current Field for Arbitrary Coil Placement outside Pipeline
Authors: Wang Xiang 
Published: March 2020

Abstract
In this paper, the eddy current field model of the pipeline excited by the coil placed arbitrarily outside the pipeline will be established by using the second-order magnetic vector position, and the coefficient expression of the coil placed arbitrarily outside the pipeline will be obtained through the addition theorem of Bessel function, thus obtaining the analytical solution of the eddy current field. Finally, the analytical solution proposed in this paper is verified by experiments.
Multi-source Geographic Information Data Fitting for Transmission Line Design
Authors: Ren Yu , Chai Linjie , Zhao Bingjun , Wang Lihuan , Ren Yaning , Wang Ning , Shen Xiangliang , Gao Fan 
Published: March 2020

Abstract
Geographic information data is the basis of power transmission line design. The topography and topography of the survey area and the distribution of trees, houses, roads, rivers and other features directly affect the route direction of the line. How to quickly and efficiently acquire large-scale and high-precision geographic information data has always been the focus of power transmission line design research. This paper presents a method of fitting aerial survey data, satellite images, geographic contour lines and other multi-source geographic information data. It can be used to determine and optimize the route plan in the feasibility study and preliminary design stage to improve the work efficiency.
Effect of Seawater Immersion on Power Frequency Over Voltage Calculation of AC Three-core Submarine Cable
Authors: Wang Weiyuan , Cheng Jinmin , Sun Yi , Liu Jinghui , Shi Dajun , Li Feike 
Published: March 2020

Abstract
AC three-core submarine cable is an important carrier to transmit offshore wind power. Limited by the laying conditions, the reactive power compensation is generally carried out at both ends of the submarine cable line. And the armour along the submarine cable is immersed by seawater until the metal sheath, which causes the sheath of the submarine cable line to be grounded everywhere. With the growth of submarine cable lines, power frequency overvoltage becomes more and more serious. In order to effectively limit power frequency overvoltage, it is necessary to study and compare the effect of different reactive power compensation schemes on overvoltage. This paper is based on the research of double loop AC three-core submarine cables. The submergence of seawater is simulated by dividing the submarine cable into sections and grounding the sheath and armour of each section of submarine cable through resistance. On the basis of this model, the changes of line power frequency overvoltage under the conditions of “55” compensation, “28” compensation and three terminal compensation are calculated and compared. Under the scheme of “28” compensation at both ends, the maximum power frequency overvoltage of the line is the lowest. The research results provide a theoretical reference for the reactive power compensation scheme of offshore wind power access system.
Study on Estimation Method for the Residual Capacity of Battery in Hybrid Devices Based on Grey Prediction
Authors: Feng Zhi-Jun , Si Guo-Lei , Yin Xiao-Qian , Shi Ping-Shan 
Published: March 2020

Abstract
In order to accurately estimate the residual capacity of battery in hybrid devices, the definitions of the residual capacity in variable current and its modified formula under the actual working condition are given. The data samples of the residual capacity are obtained from the input signals which come from the power curve of a parallel hybrid excavator being scaled down to the range of a single battery. Based on the analysis of several grey prediction algorithms on the samples, a fragmentation prediction scheme is proposed that the direct grey prediction model of the cumulative - average operator is adopted at the charge stage, and the grey prediction model of the variable weight buffer factor at the discharge stage. The result shows that the proposed method can fully and effectively improve the accuracy of prediction for the residual capacity of battery in hybrid devices.
Effect of Fresnel lens as cover in a passive solar water heater with some air gap between cover and absorber plate
Authors: Handoyo Ekadewi A , Bisono Indriati Njoto , Jonathan Peter , Valentio Dio 
Published: March 2020

Abstract
A passive solar heater can be used to heat air in a room or water for some household needs. Passive solar heater can reduce the energy consumption by converting solar radiation energy to be thermal energy. Basically, a simple passive solar heater consists of absorber plate, thermal insulation, working fluid, cover, and structure to hold everything. This paper will discuss about the effect of Fresnel lens used as the cover and the air gap between cover and absorber plate on a passive solar water heater. The results of the experiment are that the commercial Fresnel lens could not gave the highest water temperature nor efficiency for passive solar water heater. The highest efficiency with glass cover and five-cm air gap was 22.8%. The smaller the air gap, the higher the water temperature in a passive solar water heater. The highest water temperature with glass cover and five-cm air gap was 63.8°C. The result of this experiment gives new challenge for the next research: we do the experiment in a solar water heater where water is circulated in a pipe and design until manufacture the new Fresnel lens.
An Alternative Way to Locate Disturbance Source for Low Frequency Oscillation Considering Control Devices of Generator
Authors: Guo Siyuan , Zhang Shoushou , Zhao Yongsheng , Song Junying , Zuo Jian 
Published: March 2020

Abstract
Fast and accurate location of the power oscillation disturbance source is of great significance for the implementation of power system safety and stability control measures. This paper focuses on the applicability study of the oscillation energy flow. Aiming at the evaluation of the oscillation energy flow in disturbance source location of low frequency power oscillation, the effects of different methods are compared. After that, a fast Fourier transform (FFT)-based oscillation energy flow method considering control devices of generator is proposed. Taking a low frequency oscillation case caused by the abnormal governor system as an example, the effectiveness and accuracy of the proposed method is verified.
Study on the Selection of New Parallel Gap of 500kV Transmission Line at High Altitude
Authors: Hu Wen , Zhao Chun 
Published: March 2020

Abstract
The current relevant power industry standards regulate the structure and size parameters of transmission line parallel gap. But practical operation experience proves that protection failure often occurs with the 500kV parallel gap recommended in the standards. A new 500kV parallel gap suitable for general areas had been developed for the purpose of improving the efficiency of protection, reducing the damage to insulator string caused by lightning flashover, and reducing the line lightning strike outage rate. However, under the condition of high altitude, the dimension parameters of general areas cannot be directly used in the new 500kV parallel gap. This paper conducts some tests on parallel gap of different size parameters with different serial lengths at UHV engineering technology (Kunming) national engineering laboratory at an altitude of 2100 m, including, U50% lightning impulse test, volt-second characteristic test, visible corona and radio interference test. Protection effectiveness have been analyzed. The results prove that the recommended transverse extension lengths of parallel gap electrodes are 750/750mm and 800/800mm respectively, when the number of insulators is 33 and 37.