bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-interactive object extraction based on saliency detection
Authors: Pa Ting , Wang Xuan , Liu Shouxun 
Published: October 2019

Abstract
In traditional content-based image retrieval (CBIR), it is very important to segment the regions of interest for retrieval. In order to realize the non-interactive target region segmentation, this paper proposes the object segmentation based on significance region detection. The Grab Cut segmentation algorithm is initialized through the detection of the significance region, and the interactive operation is removed. The segmentation precision of the algorithm proposed in this paper is 89.51%.
Silicon Carbide Material and Railway Electrical traction Innovation
Authors: He Anqi 
Published: October 2019

Abstract
With the development of new materials and new energy industries, power devices have also made great progress. Compared with traditional silicon-based power electronic devices, wide-band gap semiconductor devices based on silicon carbide which are considered to be an important alternative to silicon-based devices, have excellent properties such as high breakdown voltage, thermal conductivity, and electron saturation drift and radiation resistance. At the same time, power electronic devices are widely used in high-speed railway. The application of a new type of silicon carbide power device in electrical traction is discussed. The experiment of system characteristics shows that the power device made of silicon carbide can effectively reduce the power loss of the system, adapt to the bad working conditions, and make the equipment lightweight.
Development of Temperature-controlled and Humidity-controlled three-body Abrasive Wear Testing Machine based on MLD-10 Dynamic Abrasive Wear Testing Machine
Authors: Bai Heda , LI Ang , Quan Wei 
Published: October 2019

Abstract
In order to simulate engineering machinery (such as mining machinery, feed pellet machine, building machinery and so on), which existence of different degrees of high temperature and humid corrosion three-body abrasive wear behavior in the laboratory environment. In view of the current three-body abrasive wear testing machine cannot simultaneously take into account the composite conditions characteristics of the three-body abrasive wear behaviour, high temperature and humidity, and make the optimization design, based on the MLD-10 dynamic abrasive wear tester. It includes corrosion and wear groove, fluid medium, temperature measuring and controlling device, stirring device, etc. A three-body abrasive wear testing Machine that can control temperature and humidity. Subsequently, the simulated working condition test of the ring die of feed pellet machine were carried out. The test results show that the wear appearance of the test sample is basically consistent with that of the real ring die of feed pellet machine. It indicates that the developed testing machine can simulate the high temperature and humid three-body abrasive wear behavior, and has good reliability and applicability.
Fabrication of Superhydrophobic Surface on Stainless Steel Meshes for Oil-Water Separation
Authors: Wang Xiaohui , Han Zhuo , Huang Shan 
Published: October 2019

Abstract
In this paper, a superhydrophobic surface for oil-water separation were fabricated by grafting polymer on 3D hierarchical polydopamine-graphene (PDA-graphene) aerogel modified stainless steel mesh (SSM). The chemical compositions and surface morphology of the as-prepared composite were characterized by HNMR, FTIR and SEM. The results show that polymer/PDA-graphene/SSM exhibits unique interfacial properities, including hierarchically porous structure, large specific surface area, hydrophilicity and oleophobicity, hence it could work as excellent oil-water separation material. Oil-water separation experiments indicate that the average water permeation of the film is 1155 L h-1m-2bar-1, and the separation efficiency is 99.1%, which identifying the excellent performance of polymer/PDA-graphene/SSM.
Construction of contact force prediction model for cushion cylinder based on simulation and response surface method
Authors: Bao Zhongfu , Zeng Dejiang 
Published: October 2019

Abstract
Cushion cylinder is often used to alleviate collision in pneumatic manipulators. The pneumatic cushion circuit is a complex system, so it is difficult to calculate the contact force accurately. In order to solve this problem, the virtual experiment is carried out by digital simulation based on experimental design and response surface method, and the contact force prediction model of cushion cylinder is obtained by analyzing the experimental data.
Cooperation mode optimization between two clutches for dual clutch transmission during the torque phase
Authors: Zhang Jing , Zhou Ruyi , Li Xinyi , Liu Jikai , Xing Qingkun , Tang Pei 
Published: October 2019

Abstract
The study focuses on the control method optimization for the Dual Clutch Transmission upshift process during the torque phase. The upshift process and two power flow paths are analyzed in detail. According to the analysis results, if two clutches slip together during the DCT upshift process, either torque hole or power circulation generates. To avoid these two conditions, the torque relationship between two clutches is optimized to enable the off-going clutch to disengage without slippage. The Matlab/Simulink platform is used to establish the DCT dynamic model. The obtained simulation results illustrate that, compared with the control methods based on two clutches slippage, the optimized one can not only avoid torque hole and power circulation, but achieve the highest system efficiency during the torque phase, which means the least friction work and the extension of clutch life.
The influence of inertia resistance on the drag torque in the wet multi-disk clutch with splined connected restriction
Authors: Shi Luqi , Ma Biao , Wu Jianpeng , Yan Xu , Li Heyan 
Published: October 2019

Abstract
A theoretical model of friction plate is established by using Resal theorem, and the inertia resistance of the friction plate is obtained from this theoretical model. Focusing on the bias phenomenon in friction pairs, a new model is investigated for analyzing the bias state under low speed difference considering about the gyro effect. As for the gap shrinkage under high speed difference, the negative pressure contraction model for the friction pairs is built by analyzing the oil film and the pressure between plates. Based on that, the influences of the inertia resistance of the friction plates for these two models are also discussed. Afterwards the gap dynamic change between friction pairs is investigated in the whole variation range of the relative speed. Finally, an improved model, considering the influence of the gap dynamic change between friction pairs, is proposed to simulate the drag torque. The results obtained from the simulation and test data indicate that, under the same lubrication condition, the drag torque in the wet multi-disk clutch increases at first and then decreases and finally increases with the rise of the rotational speed difference. Furthermore, the main factors influencing the drag torque are the bias of plates in the low speed difference (0∼1000r/min) and the gap shrinkage in the medium and high speed difference (>1000r/min) respectively. From the comparison between test data and the simulation results obtained from the improved model, the average relative error is only 6.34% at medium and high speed difference (>1000r/min), which can greatly improve the accuracy for the estimation of the drag torque in wet multi-disk clutch.
Virtual Modeling and Simulation of Transplanting Mechanism with Non-circular Planetary Gears
Authors: Yuan Yongchao , Deng Jiongfeng 
Published: October 2019

Abstract
This article deploys an exploratory development of super rice High-performance transplanter transplanting mechanism with non-circular Gears by dint of rice transplanter transplanting mechanism analog machine accroding to UG software.This research is first to building a model of non-circular Gears designed by researcher before,and then assemble the whole to obtain the result of virtual manufacturing with non-circular Gears, and assemble it on the test machine of rice transplanter test machine, also analysis the Kinematic Principle of Simulation result by UG software.Finally, make the motion trail conform to the agronomy requirement according to correcting and consummating the fember unqualified.
Application of Weighted Object Variance Algorithm in Metal Surface Defect Detection
Authors: Zhang Wanzhi , Du Jinsong , Li Xingqiang , Wang Wei 
Published: October 2019

Abstract
In the process of metal surface defect detection, it is difficult to detect and segment small defects. In order to solve this problem, this paper uses weighted object variance algorithm to detect metal surface defects. Then the feature of defect area is extracted and the defect classification model based on support vector machine is trained. In order to verify the effectiveness of the method, this paper takes the metal surface of bearing cylindrical roller as the specific research object. The experimental results show that the method meets the production requirements.
Study on spare parts requirement modelling of multi-component system under stochastic shock condition
Authors: Wang Qiang , Jia Xisheng , Cheng Zhonghua , Wang Qian , Wang Shuangchuan 
Published: October 2019

Abstract
In the field of modern industry, equipment is becoming larger and more complex. Some precision components, especially electronic components and mechanical components, will suffer from external vibration and shock and traumatic failures during operation. Therefore, the analysis of the failure process of multi-component system under the condition of common cause failure is of great significance to improve the guarantee efficiency of multi-component equipment system. When multi-component equipment system is running, the problem of traumatic failures of components under shock is not considered in the calculation of spare parts demand for the system. Based on the analysis of the correlation between equipment degradation failure and shock failure, a spare parts demand calculation model under random shock is established in this paper. Finally, the feasibility of the method is verified by an example. The simulation results show that the model can solve the problem of spare parts demand calculation of multi-component mechanical equipment under random shock.
Lightweight Design of Six-dof Tandem Manipulator Based on Additive Manufacturing Technology
Authors: Lv Xin , Yang Yongtai , Zeng Wenhao , Xu Dawei 
Published: October 2019

Abstract
At present, topological optimization represents the most advanced structural design technology, and additive manufacturing represents the most advanced manufacturing technology. Combining the two technologies to provide a very effective way for the lightweight of the manipulator arm. Taking the six-degree-of-freedom series manipulator as the object, the lightweight design was carried out from the aspects of material lightweight and structure lightweight. Firstly, under the limit conditions, the exploratory topology optimization of the manipulator arm of the aluminum alloy material and the manipulator arm of the 3D printed plastic material was carried out respectively, and the optimization results were compared. 3D printing plastic material was selected as the design material of the manipulator. Then, under the condition that the stiffness and strength requirements are met, the manipulator of 3D printing plastic material is designed with the method of size optimization and topology optimization for the two limit working conditions, and the geometric reconstruction and simulation verification are carried out at last. The results show that the final manipulator arm meets the requirements of stiffness and strength, reduces the weight by 26.5%, and finally achieves the goal of lightweight.
Research on the Performance of Honeycomb Support Structure Based on SLM
Authors: He Lijun , Zi Feiyue , Zhang Zhixiong , Tang Li , Li Po 
Published: October 2019

Abstract
Selective laser melting (SLM) can break through the constraints of traditional manufacturing methods and enable the fabrication of lightweight and complex parts. However, in the SLM manufacturing process, the overhang structure requires a support structure to be successfully manufactured. At present, the typical support structure is the lattice structure, which has poor manufacturability, and the manufacturing defects of some of the bars cause the structure to yield in advance, and the reliability is not high. In this paper, we design honeycomb structures with different parameters. A set of structural parameters with excellent performance were obtained. The compression test was carried out using the WDW-100 universal material testing machine, which shows that the honeycomb structure of this set of parameters has high strength and meets the requirements of manufacturing. Finally, taking the sensor mount as the object, this set of parameter honeycomb structure is used for light weight reconstruction, which can obtain better weight reduction effect under the premise of satisfying the strength of the parts, which provides technical support for the lightweight design of parts.
Research on Linear Vibration Feeder Driven by Langzhiwan Oscillator
Authors: Su Jiang , Tong Jie , Shen Yanhu 
Published: October 2019

Abstract
In order to overcome the shortcomings of electromagnetic interference and noise of electromagnetic vibration feeder, a linear feeder driven by Langzhiwan oscillator is designed, its working principle is analyzed, and the prototype of feeder is tested. The experimental results show that the resonant frequency of feeder is 17.5 kHz, the amplitude is 28μm when the driving source voltage is 200 V. The transmission speed of M2 nuts is 102 mm/s, and the feeder has the ability to transport materials in the frequency range of 17.1 kHz to 17.9 kHz. In addition, with the increase of voltage, the conveying speed increases linearly, and the conveying performance is greatly weakened due to the deviation of resonance frequency.
Multi-body dynamics analysis of a small piezoelectric turntable with high speed
Authors: Xue Shan , Meng Xianyu , Liu Zhengbin , Guo Jianbo , Tu Xin 
Published: October 2019

Abstract
Piezoelectric turntable is a new type of real-time image reconnaissance equipment. The fast movement of piezoelectric turntable is an important guarantee for fast target locking and tracking of imaging system. Therefore, the multi-body dynamic analysis of the piezoelectric turntable designed by virtual prototyping technology is needed to verify whether its function meets the requirements. SolidWorks software is used to build a three-dimensional model of a high-speed small piezoelectric turntable. Then, the three-dimensional model of piezoelectric turntable is simplified and introduced into Adams software for multi-body dynamics analysis. The analysis results show that the piezoelectric turntable can rotate around the azimuth axis and pitch axis at high speed, which meets the design requirements. The virtual prototyping technology improves the design efficiency and provides a theoretical basis for the design of similar turntables.
Stiffness weak link identification of cantilever beam based on vibration test data
Authors: Guo Tieneng , Cao Jinxuan , Cai Ligang , Wang Guang 
Published: October 2019

Abstract
The evaluation of the weak link of machine tool structural stiffness is the key link to improve the machining performance of the machine tool. It is proposed that the serial structure of the machine tool be equivalent to a cantilever beam structure and the static rigidity of the machine tool be studied by using the method of dynamic test. A theoretical method for evaluating the position of the weak link of cantilever beam stiffness and the magnitude of stiffness by using the curve angle index is proposed. This paper mainly studies the evaluation effect of indicators. Taking the MATLAB finite element numerical model of cantilever beam structure as a numerical example, the dynamic test data of each node of the numerical model are obtained by using the state space method. After Fourier transform, the angle index is studied by taking the amplitude of 0 Hz. The weakening of the elastic modulus of the element is used to simulate the weak link of stiffness, and the evaluation effect of the corner index is studied under the three conditions of weakening the stiffness of a single element, weakening the stiffness of two elements, weakening the stiffness of three elements and involving noise. The results of simulation and experiment show that the curve angle can be used to better evaluate the weak link of the cantilever beam, which has a certain practical value in engineering.
Analysis of amplitude-frequency characteristics of spiral vibrating feeder system
Authors: Su Jiang , Tong Jie , Shen Yanhu 
Published: October 2019

Abstract
Spiral Vibrating Feeder is a kind of common equipment in Machining Automation. Traditional theoretical analysis of spiral vibrating feeder is based on the dynamic model of vertical vibration, which can not really reflect the working condition of the system. On the basis of explaining the working principle of the spiral vibration feeder system, a three-degree-of-freedom vibration mechanics model of the system is established. The theoretical formulas of the amplitude-frequency characteristics of the system are deduced and analyzed, and Taking PEF120A feeding system as an example, the amplitude-frequency characteristics of the system are analyzed comprehensively. The experiments prove that the re-established system model is closer to the actual situation, which will lay a good theoretical foundation for the design of vibrating feeder for conveying precision components.
Analysis of Influence of Optical Glideslope Indicator Deviation on Carrier Aircraft Landing
Authors: Du Yajie , Zhao Jianjun , Yang Libin 
Published: October 2019

Abstract
The guidance provided by the optical glideslope for the carrier’s safe landing is very critical. Several optical glideslope stable modes are analyzed. And the line stability mode is chosen as the research object. In the line stability mode, the guiding principle of the optical glideslope is analyzed. Under this mode, the optical glideslope indication deviation can be represented by the offset of the “meat ball” seen by the pilot. Through simulation and calculation, the influence of different “meat ball” offsets on the landing point of the carrier aircraft can be obtained, which provides a reference for the safe landing of the carrier aircraft.
Research on Hydraulic Robot for Pipe Handling Based on Adaptive Fuzzy-PID Control
Authors: Guo Rong , Ma Wei , Zhong Haisheng , Liu Yuchao 
Published: October 2019

Abstract
In order to improve the control performance of the pipe handling robot and the tracking effect of manipulator trajectory, the adaptive fuzzy-PID algorithm was applied to the joint control of robot arm. According to the nonlinear and time-varying parameters of valve-controlled asymmetric hydraulic cylinders extending and retracting movement, considering the influence of hydraulic pipeline and oil compressibility, a mathematical model of valve-control asymmetric hydraulic cylinder system was established. The dynamic response of the system model was studied based on the co-simulation of AMESim and Simulink. The results showed that compared with regular PID, the adaptive fuzzy PID controller could effectively suppress the nonlinear effect caused by oil compressibility, and reduce the response time of the system. At the same time, it could enhance the anti-interference ability of the system, and improve the dynamic tracking performance of the pipe handling robot.
Application of Fuzzy Comprehensive Evaluation Method Based on AHP in Product Materials
Authors: Wang Weqing , Bi Yangang , Shen Xuehui 
Published: October 2019

Abstract
In order to research the material selection method of products more in line with consumer image, a fuzzy comprehensive evaluation method based on AHP is proposed to establish product material design system. Application software SPSS for factor analysis and cluster analysis, extract the perceptual image factor that affects the consumer to product material; Comparing the elements of product materials in pairs by using the tree hierarchical structure in the analytic hierarchy process, the fuzzy relation between consumer image and product material quality is presented in a quantitative form, establish a product material design system that meets the consumer’s perceptual intentions; Using fuzzy comprehensive evaluation method to quantify product material design system, Verify the accuracy of the research results. Taking the material selection of lipstick as an example to verify and analyze, it is proved that the fuzzy comprehensive evaluation method based on AHP is an effective method for product material research, it can provide theoretical guidance for designers’ material selection and decision making.
Effect of the build orientation on the mechanical behaviour of polymers by stereolithography
Authors: Liu Haorui , Yang Nana , Sun Yitong , Yang Laidong , Li Ni 
Published: October 2019

Abstract
The use of Rapid Prototyping techniques for the production of end-use parts is increasing in rapid manufacturing. The mechanical properties of stereolithography parts become the most important factor restricting its wide application. The mechanical properties of stereolithography parts can be not only influenced by the material characteristics, but also by the parameters of manufacturing. The purpose of this study is to investigate the influences of the build orientation on mechanical properties of stereolithography parts. Specimens were fabricated with different build orientations related to layout (flat or on an edge), axis and build angle. Mechanical testing including tensile, compressive and impact tests on stereolithography specimens were conducted. The results indicated that layout had a significant effect on tensile and impact properties, and the axis had no significant effect on tensile and impact properties. Also, build angles play an important factor in the compressive strength. From these results, it appears that related characteristics of layer interface have a significant influence on mechanical properties of stereolithography specimens.
Machine Learning Approach Based on Gene Expression Programming for Dynamic Production Scheduling Problem
Authors: Nie Li , Wang Xiaogang , Bai Yuewei , Wu Xiaoyan 
Published: October 2019

Abstract
Dynamic Job shop scheduling problem (DJSSP) which involves the dynamic characteristic of job arriving over time is one of the most popular scheduling problems in manufacturing system. In the paper, a machine learning approach is proposed for DJSSP. The proposed machine learning approach employs gene expression programming (GEP) which introduces automatically defined functions (ADF) into the representation of chromosome to construct efficient scheduling rules (SRs) automatically for DJSSP. The proposed GEP-based machine learning approach is evaluated and the results show that the approach is effective.
The error modeling and measurement of 3-axis machine tools
Authors: Pan Fangyu , Bai Yuewei , Xu Kefeng , Nie Li , Wang Xiaogang , Liu Kai , Wu Xiaoyan 
Published: October 2019

Abstract
Machine tools’ accuracy is key characteristic, which may affect processing quality. Error compensation is an efficient and economical way to upgrade machine tools’ precision. The paper focuses on the basic research of error compensation, which includes source of errors analysis, error modelling and errors acquirement. Thus, 21 geometric errors are sought out which have strong influence on the precision; relationship between errors and compensation is built; the measurements for all 21 errors (including the vertical roll error) are presented, by the experiments; the feasibility is validated.