bluuebunny/crossref_metadata_2025_split huggingface dataset:
Innovative and optimized design of automatic adjustment system for beaded rope of new diamond wire sawing machine
Authors: Wei Bangju , Liang Huiping , feng JiaHao , Liu JianWei , Xie Shenyan 
Published: August 2020

Abstract
Compared with traditional stone cutting technology, the diamond wire saw cutting technology is more efficient, safer and less polluting. Therefore, wire saw technology is more and more widely used in stone mining and other fields. However, the existing wire sawing machine must ensure the tension of the string bead wire at all time during the cutting process. Therefore, after cutting for a period of time, the wire breaking work must be performed, which greatly reduces the engineering efficiency, so this paper introduces a new automatic adjustment device of a diamond wire saw. Firstly, the overall structural design of the diamond wire saw is introduced. Secondly, the mechanical structure and sensing control of the automatic adjusting device of the diamond wire saw are introduced in detail. On the basis of the original wire saw, an adjustable wheel that can be automatically moved is added, and the working pressure of the string bead wire is measured in real time by a pressure sensor, the back and forth movement of the adjusting wheel can be controlled to drive the stretching of the string bead wire, thereby realizing the automatic tensioning of the string bead wire; Finally, working parameters of the wire saw are transmitted by Bluetooth or other wireless communications to achieve remote control operation of the wire saw. Through the innovative and optimized design of the automatic adjustment system for string bead wires of the wire saw, it provides a good reference for the high-efficiency, low-cost and environmentally-friendly quarrying technology.
Multi-target visual recognition and positioning methods for sorting robots
Authors: Liu Xinying , Jin Shoufeng 
Published: August 2020

Abstract
Aiming at the problems of complex shape and random placement of sorting robots, this paper proposes a multi-objective visual recognition and positioning methods for sorting robots. A sorting robot system with visual perception was constructed,which based on the four-degree-of-freedom DOBOT robot. What’s more, the visual system acquires images of multiple targets on the conveyor belt, the image preprocessing algorithm improves the contrast of the sorting targets, thus circular and linear structural elements are constructed in order to fill and smooth the multi-target regions segmented by the largest inter-class variance method. Besides, Establishing centroid coordinates based on image information to identify and locate connected domains of multi-target regions. The experimental results show that the method can achieve statistics on the number of multi-targets. On the basis of the hand-eye calibration of the sorting robot, the multi-objects with complex shapes and random positions are identified and positioned, and the positional information provides the autonomous grasping and sorting for the sorting robot.
Study on fuzzy duration of serial coupled iterative design tasks in product development
Authors: Tian Qi Hua , Zhang Ci , Zhu Wei , Kang Huang Jia , Zhang Yu Rong , Man Zhou Xiang 
Published: August 2020

Abstract
The existing serial coupling iterative design in product development has the uncertainty of the task duration, and it is difficult to solve the task duration. Based on the Markov chain method and the fuzzy theory, a fuzzy duration model of serial coupled iterative design task was constructed, and the fuzzy durations of each stage of product design task were obtained. Taking the body design process of an electric vehicle as an example, this method was applied for analysis. The research shows that the execution time of each stage task is prolonged under serial coupling iteration, and the longer the serial coupling iteration task execution chain is, the more the task execution time increases. This study has a certain reference function for complex serial coupled iterative design planning.
Accuracy analysis and errors compensation of 4-DOF reconfigurable punching robot
Authors: Ge Zhenghao , Chen Hao , Han Xiaoyu 
Published: August 2020

Abstract
The aims of this paper were to enhance the accuracy of the 4-DOF reconfigurable punching robot when it was working, as well as to reduce the error made by robots when they were loading and unloading materials. For these ends, by elucidating the composition and function of 4-DOF serial re-configurable punching robot, the static pose error model and the dynamic pose error model of the robot actuator were built in the present paper. Besides, MATLAB was employed to plot the actuator pose error curve. Subsequently, the pose error of the robot actuator under was delved into based on both static and dynamic factors. Afterwards, the comprehensive pose error model of the actuator was developed to plot the comprehensive pose error curve of the actuator. The perturbation compensation method was used to compensate the robot actuators. The results showed that the positioning accuracy of the robot was effectively improved. These the mentioned efforts, a solid basis was laid for manufacturing the 4-DOF reconfigurable punching robot, as well as enhancing its accuracy.
Research on finite element analysis and modelling of bolted joint
Authors: Li Pengyang , Li Wei , Wei Peiliang , Wang Quandai 
Published: August 2020

Abstract
The bolted joint is one of the most widely used fixed joints in mechanical structures, and has considerable impact on the dynamic characteristics of mechanical structures. Therefore, the correctness of bolt joint modeling is the key to the dynamic performance analysis and behavior prediction of the entire mechanical system. In this paper, the stiffness of the lapped beam structures was calculated according to the empirical formula for the dynamic stiffness of the joint surface, and an equivalent model of the bolt joint was established using the spring-damping element in ANSYS. Meanwhile, another equivalent model of the bolt joint was established by using the virtual material layer method. Finally, the modal test of the lapped beam structure with the bolted joint was carried out, and the simulation results obtained from the two theoretical modeling methods were compared with the modal test results. The results showed that the modeling method using the spring-damping element has higher modeling accuracy compared with the virtual material layer method, and the errors in the first six natural frequencies were within 2.2%, which verified the correctness and effectiveness of the spring-damping element modeling method, and provided a basis for the modeling of bolted joints in practical structures.
A novel control method for roll gap of roller crusher based on Fuzzy-PID with decision factor self-correction
Authors: Yang Yinwei , Fan Kai , Xu Jing 
Published: August 2020

Abstract
Roller crusher is widely used in solid and block material pulverizing. Roll gap between the rollers is usually adjusted to satisfy the particle size of output material. In order to realize convenient adjustment, a roll gap control scheme based on electro-hydraulic technology is designed and optimized. And Fuzzy-PID is applied to realize the automatic process. Moreover, decision factor self-correction is introduced to balance the number of Fuzzy rules and system precision. Finally, an experiment platform and some simulations are conducted to validate the performance of the proposed approach.
Fault monitoring of inner frame paper cutting transmission coupling of packaging machine based on intelligent analysis of noise
Authors: Li Guangcai , Zhen Huanju , Wang Deji 
Published: August 2020

Abstract
This article analyzes the noise signal of the packaging machine coupling through artificial intelligence technology, performs feature extraction and analysis on it, and realizes the status recognition and health analysis of the device. This method can successfully analyze the machinery and equipment to find the manual inspection. The problem that is neglected, the method of monitoring packaging equipment through noise energy is a new method with great potential for the actual plant environment.
Study on mechanical properties of thin-walled cavity structure with a large aspect ratio for ultra-precision optical instrument
Authors: Li Lin , Zhong Jun , Sui Jie , Zhang Yun-fang , Lv Wei-zhen , Wang Xiao-yan 
Published: August 2020

Abstract
The maximum size scale of a Thin-walled Cavity Structure (TSC) with A Large Aspect Ratio (TCSA) for ultra-precision optical instrument used in space station is more than 500. The TCSA should be strong enough, and at the same time, its mass should be lighter. Firstly, the characteristics of the thin-walled structure with ring-rib and longitudinal rib cavity were discussed, and the optimization design method of the rib structure was put forward based on the rib contribution theory. Secondly, the mathematical model was established, and the sensitivity analysis of the design variables and objective functions was carried out. On this basis, the iterative formula of the optimization of the rib structure was derived, and the optimization design of the TCSA was carried out. Finally, the system level simulation analysis and mechanical test were carried out for the optimized structure. The results show that the maximum relative changing rate of the first-order frequency before and after the test is 2.05%, the maximum relative error of the first-order frequency between the calculation mode and the test mode is 1.23%, and the fundamental frequency of the whole instrument is greater than 120Hz, which proves that the finite element model is more accurate. The displacement of random response of TCSA after optimization is 0.61mm, the maximum stress is 39.2mpa, far less than the allowable stress, which meets the mechanical requirements, and the adopted optimization method was proved to be useful. At the same time, the high precision optical instrument with good mechanical properties was also proved.
Research on thin spray-on technology and equipment of coal mine
Authors: Min Fusong , Chen Ke , Li Xiangyang , Pang Shudong 
Published: August 2020

Abstract
Based on the existing problems and demands of coal mine support, as well as the advantages of thin spray-on liner in coal mine support and gas sealing, the research on thin spray-on material is carried out. Two kinds of thin spray-on products are qualitatively analyzed, and the thin spray-on equipment is developed and applied. The results show that the performance of thin spray-on material meets the requirements of coal mine. The production efficiency and construction speed are improved, and the underground material transportation volume and the number of workers are reduced. At the same time, gas infiltration is reduced and the safety of the underground is improved.
Synthesis and networking of tetrahedral deployable mechanism based on screw theory
Authors: Huang Zhirong , Ma Xiaofei , Hu Fei , Zhu Jialong , Xu Yundou 
Published: August 2020

Abstract
Aiming at the synchronous motion of tetrahedral deployable unit, the kinematic pair is designed and the coupling motion branch is synthesized based on screw theory. The optimal deployable unit is determined by the application. According to the networking requirements, a networking mechanism composed of multiple units with coupling degree of freedom (DOF) is synthesized. The application of the screw theory in the configuration synthesis of deployable mechanism is realized in this paper. The mechanism is suitable for the deployable mechanism of satellite antenna reflector or other space surface deployable support mechanism, which has broad application prospects.
A simple process optimization route to fabricate curved bionic compound eye array
Authors: Huang Shengzhou , Wang Lei , Zheng Yanchang , Su Yongsheng , Wang Fengtao 
Published: August 2020

Abstract
In this paper, a complete and simple process optimization route for the curved bionic compound eye (BCE) array fabrication is presented based on digital micromirror device (DMD) maskless lithography. Firstly, based on the study of edge bulge effect in the thermal reflow process, a proper curved BCE structure is designed. Then, through the optimization of multilayer coating process it can obtain a better uniformity of different photoresist layer and accurate thickness. Next, combined the DMD maskless lithography technology with the Poor Man’s dissolution rate monitor (DRM) approach, well-preformed hierarchical cylindrical structure can be simply fabricated. Lastly, the curved BCE structure can be obtained precisely by choosing the reasonable process control parameters, which depended on the study of two-step thermal reflow processes. This process optimization route makes it very easy to realize the curved BCE array structures with different ommatidium shapes. Experimental results showed the effectiveness of our process optimization method. The presented method is expected to provide a fast, economic and simple strategy for curved BCE array fabrication.
A method based on ASTME1012 to adjust the alignment of the material testing machine
Authors: Xu Jian , Zhao Yinming , Chai Jixin , Chen Kexing 
Published: August 2020

AbstractA method by using strain-gauged transducer to adjust the alignment of the materials testing machine is introduced in this paper. In order to improve the accuracy of the material test, the alignment of the material testing machine should be adjusted before tests. A transducer with three levels of strain gauges is applied before the specimens are tested. By calculating the bending stress according to the equation in ASTME1012,an adjustment suggestion to reduce the angular misalignment and concentric misalignment is given by the calculation results. Through adjusting the direction and position of the grips until the value of the strain gauges meet the requirement, the misalignment of the material testing machine will be removed.
Experimental study on vibration fatigue of a certain chassis
Authors: Cao Weizhong , Hu Changming , Liao Tao , Rui Shen 
Published: August 2020

Abstract
The chassis is the structure for installing and protecting various circuit units, components and mechanical components inside the electronic device. Vibration fatigue damage is a major form of structural damage, and the vibration fatigue life prediction of the chassis structure is of great significance. The theoretical calculation of structural vibration fatigue life has frequency domain method and time domain method, but it has certain limitations. The theoretical calculation method can not accurately obtain the vibration fatigue life of the structure. According to the actual structure of a chassis, this paper designs and processes a test model of a chassis, applies a random vibration load to the vibration table, and performs vibration fatigue test to predict the vibration fatigue life of a chassis structure. The results show that the vibration fatigue life of the chassis is 40 hours, and fatigue fracture occurs first at the pin.
Analysis of the structure of wood-plastic composite coated co-extrusion head
Authors: Ge Zhenghao , Chang Hongli , Ren Shanshan 
Published: August 2020

Abstract
In order to further solve the problem of the flow path of the head of the existing wood-plastic composite co-extrusion, the structural defects of the head are accurately found. This article first simulates the core and shell flow channels separately to simulate whether they are uniformly extruded and whether the exit speed is consistent. It is further analyzed that the cause of the uneven coating of the part is the problem of the shell flow channel and its structure. It does not meet the design requirements. Then, by proposing a variety of different flow channel structure optimization schemes, further simulations are performed, and the fluid flow trend is analyzed based on the simulation results. First of all it is determined that the existing flow path shape itself has problems. Considering the structure of the overall nozzle flow channel, based on the analysis of the flow channel trend, a new solution for the design of the co-extrusion ring flow channel is proposed. Further solve the structural problem of the coating head,which improved the design efficiency and reduced the waste of personnel and materials caused by continuous die testing. It has certain reference value for follow-up.
Study on molding technique for millimeter-wave radome with frequency selective surface
Authors: Yang Chunxia , Zhu Yongming , Gui Tao 
Published: August 2020

Abstract
In the paper, the molding process of the millimeter-wave radome with frequency selective surface was studied, and the key factors were discussed such as the selection of the material, the design of the mould and the curing parameters. The millimeter-wave radome with FSS has the high requirement for thickness uniformity and surface precision. The layout design and the moulding parameters control were discussed to achieve the high performance of the radome. The testing results show that the manufactured radome has the smooth surface and thickness precision of ±0.1mm. The average transmission efficiency of the radome working at the operating frequency and in the sweep range is ≥90%. The performances of the radome entirely meet the design requirements.
Fracture analysis for reasons of bellows with braided hose
Authors: Sun Gang , Mao Lina , Li Xiaolin , Sun Xiaona , Huo Ningfei 
Published: August 2020

Abstract
The fracture of metal braided hose around bellows were found in working condition. Then, the macroscopic analysis, fracture analysis, metallographic analysis and chemical composition analysis were performed separately by using Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS) and other equipment. The causes of the damage in the braided hose are studied in this paper. The results show that the pitting corrosion and stress corrosion caused by chloride ion are the major factors of wire breakage. In follow, the preventive measures for such accidents for this fracture accidents are put forward.
Natural lubrication mechanism of twisting in ring spinning and its experimental analysis
Authors: Chen Ge , Gao Yongshan , Zhou Honglei , Xue Wenliang 
Published: August 2020

Abstract
In the spinning process, the natural lubricating film between the ring and the traveller changes the dry friction between them. In this paper, the composition of natural lubricating film is analyzed by DA1-180M microscope observation and Fourier infrared spectrometer. The eddy current sensor was used to detect the movement of the traveller on-line. The number of abnormal acceleration of the traveller reflects the stress stability of the traveller, and the lubrication effect of the natural lubrication film was analyzed. The experiment shows that the natural lubricating film is composed of the spun fiber, which can make the stress of the traveller relatively stable in the short term, but in the long term its lubricating effect cannot eliminate the wear between the ring and the traveller.
Structural analysis of coreless spoiler
Authors: Song Jia , Lv Haicui , Wang Yanli 
Published: August 2020

Abstract
In this paper, a coreless spoiler is proposed to be an alternative solution for moisture absorbed honeycomb core. The honeycomb core is removed from the spoiler and the coreless spoiler is analyzed by using finite element tool, Abaqus. The results show that the upper skin fails at region near to the actuator, Tsai-Hill is more than 1. Few options, such as ßrib, spar and Carbon Fiber Reinforced Plastic (CFRP) patch are introduced to support the weak region of coreless spoiler. The effectiveness of these notions is evaluated based on Tsai-Hill failure. The spar outperformed the other options. Only the spar is capable of giving sufficient support to the coreless spoiler and the structure does not fail in term of Tsai-Hill index.
The collapse response of web-core sandwich panels partially filled with metallic foams under drop-weight impact
Authors: Xie Zhongyou 
Published: August 2020

Abstract
Thin-walled web-core sandwich structures are widely applied due to their weight specific mechanical performance. When subjected to a transverse load, the sandwich structures are apt to undergo local deformation which would considerably decrease the cross-sectional height and their global load resistance, especially under a concentrated load. In the paper, a novel method is proposed only to fill the upper compressive region of the web-core sandwich panels other than the whole cross section with metallic foams, which would effectively restrain the local deformation at the cost of slight increase of the structural total mass. The collapse response of web-core sandwich panels with four different reinforcing configurations under drop-weight impact is investigated using ABAQUS code. The numerical results show that the two empty panels without foam filler have a close valley force and the foam filler significantly improves the structural load-carrying capacity after the initial elastic peak force. Moreover, it is noticeable that the partially filled panel suggested here demonstrates the similar load resistance to the fully filled one and much more weigh specific energy-absorbing performance than the other three sandwich panels.
Machine learning for faster and smarter fluorescence lifetime imaging microscopy
Authors: Mannam Varun , Zhang Yide , Yuan Xiaotong , Ravasio Cara , Howard Scott S 
Published: August 2020

Abstract
Fluorescence lifetime imaging microscopy (FLIM) is a powerful technique in biomedical research that uses the fluorophore decay rate to provide additional contrast in fluorescence microscopy. However, at present, the calculation, analysis, and interpretation of FLIM is a complex, slow, and computationally expensive process. Machine learning (ML) techniques are well suited to extract and interpret measurements from multi-dimensional FLIM data sets with substantial improvement in speed over conventional methods. In this topical review, we first discuss the basics of FILM and ML. Second, we provide a summary of lifetime extraction strategies using ML and its applications in classifying and segmenting FILM images with higher accuracy compared to conventional methods. Finally, we discuss two potential directions to improve FLIM with ML with proof of concept demonstrations.