bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of mechanical arm based on piston fire rescue and emergency lock system in public places
Authors: Ma Yuan , Tang Bo , Ma Xu , Chen Yuxiao , Wang Yong , Zhang Ziqi , Liu Lu
Published: October 2019

In recent years, emergency have occurred in public place, especially fire, such as the Xinyi City Yiyuan Song and Dance Hall in Liaoning, and the Karamay Friendship Hall in Xinjiang, Henan Jiaozuo City Paradise Audio and Video Club. The common lesson is that the security channel is blocked by the security door and the security net, and the security exit is closed, causing people to escape without a door when the fire occurs, causing heavy casualties. Again and again, firefighting and rescue, all must first remove the security door, iron fence window to rescue the trapped people, missed the best time to extinguish the fire. In order to solve the problem of unimpeded safety exits, it is necessary to solve the problem of consistency between normal use management and fire safety. It is difficult to be effective only by administrative means, and technical measures must be taken to solve the problem of safety dredging. Small-scale hotels, Internet cafes, etc. without fire or security systems must be able to push open the emergency exit door, but an alarm will be generated locally when the door is opened during normal working hours. The emergency exit door of an emergency gathering place such as a large-scale hotel, an Internet cafe, a dance hall, a hotel, a department store, etc., which is connected by a fire-fighting linkage system or an anti-theft alarm linkage system, must be pushed open, but will open when the door is opened during normal working hours. Local alarms are generated, so it is especially important to design a security door that can automatically unlock when an emergency occurs in a public place.
Application of Polymer Materials with High Mechanical Properties in Competitive Sports
Authors: Tong Yibao
Published: October 2019

competitive sports is a sport that pursues higher, faster, stronger and more accurate sports goals. It is a sport that challenges the limits of individual athletes and even human sports. A polymer material with high mechanical properties, such as strength, elasticity and toughness. In this paper, the application of polymer materials with high mechanical properties in competitive sports was studied.
Analysis on the Developing Situation of CHINA RAILWAY Express
Authors: Zhang Zhijia , Li Xiaohong , Zhang Zhiwei
Published: October 2019

With the further implementation of the Belt and Road Initiative, the economic trade and exchanges between China and Europe, also including countries along the routes, have developed rapidly, resulting in a growing demand for the logistics. In this context, CR Express is developed. However, its rapid growth highlights many problems. In this paper, the current operating situation of CR Express is analyzed firstly, including the quantity, area of operation and type of goods. Then, analysis on the main problems of the operation is carried out from different aspects, especially the organization of goods source, loading technologies of container and facilities and equipment. Finally, concrete countermeasures are put forward to improve the operation of CR Express.
Comparison of equivalent model methods of joint surface based on modal analysis
Authors: Han Renxiu , Li Guoxi , Gong Jingzhong , Zhang Meng , Zhang Kai
Published: October 2019

The mechanical joint surface plays an important role in transmitting motion, load and energy during the normal operation of the mechanical system. Effective mechanical joint equivalent models are established to solve the practical problem of the dynamic model engineering. Equivalent models of joint surface in this study include spring damping method, virtual material method and Bond connection method. Firstly, the model is established by CATIA. Secondly, the physical properties of the model are assigned by ANSYS or Abaqus finite element simulation software. Then the modal analysis of the model carries out. By comparing the mode shapes and natural frequencies of the three methods, it is concluded that the mode shapes of the three methods are basically the same. Therefore, all three methods are reliable joint surface equivalent models. However, the natural frequency obtained by the virtual material method is significantly lower than the natural frequencies obtained by the other two methods. It is concluded by analysis that the natural frequency error obtained by the virtual material method is small, and the spring damping method and the finite element method have large errors.
Secondary electron emissive thin film fabricated by atomic layer deposition
Authors: Lin Yanjian , Gu Yunting , Yan Baojun , Liu Shulin , Wen Kaile , Wang Yuman , Heng Yuekun
Published: October 2019

The secondary electron emissive alumina thin film was fabricated by atomic layer deposition (ALD). The film thickness, structure and composition were characterized by Spectroscopic Ellipsometry (SE), X-ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The secondary electron yield (σ) of the sample was measured by pulsed electron beam method and the influences of primary electron energy and primary electron angle on the σ have been investigated.
Modal analysis and optimization of the main frame of a spherical stable platform
Authors: Xue Shan , Liu Zhengbin , Guo Jianbo , Zhang Zhen , Lv Qiongying
Published: October 2019

The frame of spherical stabilized platform is the main part and the key component. The initial main frame of a spherical stabilized platform is designed. In order to make the main frame of a spherical stable platform lighter and more rigid, the improved design is carried out. The SolidWorks software is used to conduct 3d model for the initial design and the improved design, and to compare the quality of the two designs. The finite element model of the two designs is carried out by using ANSYS software, and then the modal analysis is carried out to obtain the first natural frequency of the main frame. The comparison results show that the improved design is lighter than the initial design, the first-order natural frequency is improved, the corresponding stiffness is greatly improved, and the resonance does not occur in the frequency range of 80Hz ∼ 160Hz, which meets the design requirements. Finally, the improved four-jaw design is adopted to provide a reference for similar platform design.
Changes of Alkali Metal Ions and Alkaline Earth Metal Ions on The Surface of Lead Silicate Glasses
Authors: Jia Jinsheng , Zhang Yang , Zhang Xian , Sun Yong , Wang Yun , Zhang Lei , Liu Juan , Wang Chen , Yu Haoyang
Published: October 2019

Lead silicate glasses are currently the most employed glasses for microchannel plates (MCP) and other applications. X-ray photoelectron spectroscopy was used to determine the changes of alkali metal ions and alkaline earth metal ions on glasses surface during hydrogen reduction. The results showed that the chemical states of alkali metal ions and alkaline earth metal ions did not change. However, the content of these metal ions increases, which is beneficial to secondary electron emission yield of lead silicate glasses and the gain of MCPs.
Surface Compositional Studies of Mircochannel Plates During Hydrogen Reduction by XPS
Authors: Jia Jinsheng , Zhang Yang , Sun Yong , Zhang Xian , Wang Yun , Zhang Lei , Liu Juan , Wang Chen , Fan Zhiheng
Published: October 2019

Lead silicate glasses are currently the most employed glasses for microchannel plates (MCP) and other applications. X-ray photoelectron spectroscopy was used to determine the distribution and variation of surface composition of lead silicate glasses during hydrogen reduction. The results showed that the binding energy of silicon, sodium, potassium, magnesium, barium and cesium did not change. However, the content of metal elements is gradually increased increases, while the alkali metal ions and alkaline earth metal ions migrate to the surface. At the same time, the bridge oxygen and non-bridge oxygen content also changed. All the changes of valence and content of elements on glass surface eventually lead to the change of electrical properties of MCPs.
Electro catalytic Performance of bimetallic LDH on Mxene Adsorbed Nickle Foam
Authors: Zhang Ruya , Zhou Yang , Yue Qin , Kang Yijin
Published: October 2019

Mxene is a typical two-dimension material which have widely applied in many fields. Following the design strategy of electrostatic adsorption, coupled with bimetallic LDH, the layered Mxene is successfully used in electrochemical system. A large number of negative groups on the surface of Mxene are used to let Mxene monolayer adsorb on self-supporting materials. The comparison of the electrocatalytic performance before and after the adsorption of Mxene showed that a small amount of absorbed Mxene did have the effect on the reaction activity. The different bimetallic LDH synthesised by hydrothermal method was supported on this new material NF@Mxene. After exploring various combinations, the NF@Mxene with NiFe LDH was proved to be the best OER catalyst. This strategy will provide possibilities for subsequent Mxene electrocatalytic applications.
Effect of TiB2 on Properties of TiAl-based Alloy
Authors: Yan Bin , Yang Liying , Sun Zheng , Wang Qimeng
Published: October 2019

In this paper, we added particle reinforced phase TiB2 in TiAl-based composites, TiB2/TiAl matrix composites were prepared by using powder metallurgy vacuum hot pressing sintering technology, and the effects of TiB2 particle reinforced phase on the mechanical and tribological properties of TiAl-based alloy were studied. It was found that the hardness and density of TiAl-based alloy composites increased with the addition of TiB2, the friction coefficient and the wear loss decreased with the increase of TiB2 content in TiAl-based alloy. The wear resistance of TiAl-based alloy can be improved by adding TiB2 particles.
Current Situation and Countermeasure Analysis of Study Tour ──Taking Guangzhou as an Example
Authors: Chen Lan
Published: October 2019

As a product of the integration of tourism and education, study tour has attracted more and more attention. Based on the analysis of the current situation and problems of study tour in Guangzhou, this paper puts forward some suggestions for the development of study tour.
Modeling of Precision Machining for Crankshaft Follow-up Grinder
Authors: Wu Changjun , Fan Jinwei , Zhang Yiling , Zhao Yuanyuan
Published: October 2019

In this paper, follow-up grinding of crankshaft is studied and the mathematical model of follow-up grinding motion is established. Taking the double grinding wheel crankshaft follow-up grinder as the research object, the motion errors of the machine tool are obtained by analyzing the motion relations among the moving bodies. Based on the kinematics theory of multi-body system, the kinematics model of the whole machine tool is established. The position matrix of any cutting point is described according to the kinematic chain of “bed-workpiece” and “bed-tool”, and the precise machining model of double grinding wheel follow-up grinding machine tool is established by using the coincidence principle of tool actual trajectory and tool path. The coordinate system of each moving body is established, the transformation matrix between moving bodies is obtained, and the precision machining model of double grinding wheel follow-up crankshaft CNC grinding machine is solved, which lays a foundation for error compensation of the machine.
Research on Error Modeling and Identification Technology of CNC Camshaft Grinder
Authors: Tao Haohao , Fan Jinwei , Jia Xin , Yin Jian , Qi Guochao
Published: October 2019

Taking certain type of CNC camshaft grinders as the research object, through the analysis of its structure and movement to determine a total of 21 error parameters, a model describing the motion relations between adjacent body coordinate systems containing the error parameters was established. The machine movements were classified into two kinematic chains: the “bed-workpiece” and “bed-tool”. The topological structure of the machine tool was built and then the multi-body system theory was applied to model the errors of the machine tool. Body coordinate systems and motion reference coordinate systems were set up on each moving body and the corresponding transformation matrix was derived by joining the motion relation models between adjacent body coordinate systems. In order to achieve precision machining in the case of the existence of influential errors, a constraint equation Pw = Pt was put forward and solved. A mathematical model of the X-C axis linkage during camshaft grinding was proposed to work out the grinding point coordinates in the workpiece coordinate system and tool coordinate system. Three kinds of measurement methods were provided to identify 15 error parameters affecting the camshaft machining by using a cue instrument, which provides necessary conditions to research the machine tool error compensation.
An Improved SIFT Algorithm for Monocular Vision Positioning
Authors: Niu Xinyue , Pu Jiexin , Zhang Chi
Published: October 2019

In view of the high real-time and accuracy requirements of the monocular hand-eye vision system in the positioning process, and in the case that the existing image matching algorithm can not meet these two requirements well at the same time, this paper improves the SIFT feature matching algorithm based on local features. First, the corner points determined in the Harris operator are used instead of the key points determined by the SIFT algorithm as feature points in the template image and the image to be matched. Then, a 32-dimensional feature description vector is constructed for each of the selected feature points through a Gaussian circular window. In the registration phase, the Euclidean distance is used as a measure function to match the 32-dimensional feature descriptors. Finally, 100 template images acquired by the monocular hand-eye vision experimental platform are used to test the matching effect of the improved SIFT algorithm, which proves that the improved algorithm has higher improvement in matching time and registration accuracy than the original algorithm. It is applicable to image registration for monocular vision positioning in industrial practice.
Design and application of automated mechanical arm and intelligent transport vehicle
Authors: Guo Xingqi , Zhu Zhiyuan , Yan Dongmei
Published: October 2019

At present, the constant development of industrialization has ushered in a wide use of vehicle-mounted mechanical arms in all walks of life. Yet there are still some deficiencies, such as large load, low intensity, poor efficiency, etc. In such case, an armtype automated transport system is designed to improve its dynamic performance. The multi-degree-of-freedom mechanical arm is used as the mechanical structure to realize loading and unloading and the single-chip microcomputer is used as the main controller. Loading and unloading can be realized through smooth and flexible movements and the motion control of mechanical arm and automated transport vehicle is achieved through Raspberry Pi. The traditional mechanical arms are optimized in their structure and precision to increase their precision and enable them to meet different system requirements with applicability, economy, robustness and scalability.
A Stair-clamping Wheelchair for Elder People Based on Compound Structure
Authors: Fang Zhijin
Published: October 2019

In China, there is still a lot of the buildings which are without elevator, meaning that the floors can only be accessed by walking up and down stairs. It is slow, time-consuming and energy-consuming. At the same time, due to social enhancement like rising life expectancy, population aging has become a common phenomenon in majority regions of China. As there are more old people in the residential system, the challenge of climbing staircases is beginning to be considered as a potential social issue. Indeed, it is easy to find a stair-climbing wheelchair on the market nowadays, but not much device is able to provide the proper help for the majority of old ones who suffer through a daily double challenge of carrying some heavyweights from the vegetable markets and climbing the stair just to access residents. At present, the stair-climbing mobility has already been developed for several years, and there are a lot of different mechanical structures with different features. My design attains the maximized efficiency of stair-climbing and is able to consistently maintain the weights in the box structure always horizontal relative to the ground, under a device-body angle self-adjusting system. And it is able to do the job stably and efficiently, it will further facilitate the elders’ lives.
Design and characteristic analysis of a four-claw spherical photoelectric stabilization platform
Authors: Xue Shan , Lv Nanfang , Meng Xianyu , Liu Zhengbin , Guo Jianbo
Published: October 2019

Airborne photoelectric stabilization platform is an important tracking and scanning equipment. In order to make the photoelectric stabilization platform smaller and lighter, a four-claw spherical photoelectric stabilization platform is proposed. The four-claw spherical photoelectric stabilization platform is driven by piezoelectric motors with parallel structure. SolidWorks software is used to build the three-dimensional model of the stabilized platform. After reasonable simplification, the finite element model is built in ANSYS software. Comparing different mesh generation methods in the process of establishing finite element model, the mesh distortion is reduced from 0.74 to 0.38 by changing the mesh correlation and refinement. Different materials are used to design the platform, and the mass of the platform under different materials is compared. The platform mass of the new material is 30.3% and 66.4% less than that of the other two materials. The static characteristics of the platform with new materials are analyzed, and the maximum deformation and stress of the platform are analyzed. The results show that the designed airborne spherical photoelectric stabilized platform with new materials meets the requirements of stiffness and strength, which provides a reference for the design of such platform.
Generalized mechanics of flexure hinges for unified simulations
Authors: Xu Siqiang , Liu Pinkuan
Published: October 2019

Flexure hinges are widely introduced into precision mechanisms to perform the smooth motion without backlash and friction. In this paper, a generalized beam element based on the weak form quadrature element method is proposed to assess the compliances of the flexure hinges with different profiles. The flexure hinge is regarded as the Timoshenko beam taking the shearing effect into account. The elemental stiffness matrix is obtained with solution of algebraic equations and the explicit mesh structure is not required for compliance modelling of the flexure hinge with an arbitrary profile. The compliances of two typical types of flexure hinges are computed based on the proposed element. The results are compared with ones yielded by analytical equations. Then the high accuracy and effectiveness of the proposed element are validated.
Study on large - scale in - situ pressurization test of steel composite support
Authors: Hu Qi , He pinpin , Fang Huajian , Xie Jiawen , Zhang Kai , Song Junguo
Published: October 2019

The reinforced concrete support as the horizontal internal support of the foundation pit engineering has the optimal effect in limiting the displacement of the surrounding structure, but the engineering cost is high, and the environmental impact is large when it is removed. In some of the foundation pits that meet the requirements, steel supports are used as internal support, which has the characteristics of economy, efficiency and green environmental protection. The restressed steel composite support is connected by high-strength bolts, which has a high strength and a wide application range than the traditional steel support joints. Through the normal axial compression test, the unconstrained axial compression test and unrestrained eccentric compression test were carried out on the composite support of section steel, the influence of steel composite support on the displacement of retaining structure under different loads is explored, and the deformation performance of steel composite support is also explored. The test shows that the displacement of the retaining structure changes linearly with the applied load, and most of it is elastic deformation, and the displacement of the retaining structure on both sides of the support has obvious side-angle effect; The test applied load far exceeds the total prestress value of the composite support of the steel, and the compression deformation of the composite steel support exhibits elastic deformation; The test results show that the steel composite support has strong adaptive stability and large safety redundancy value.
Experiment and numerical simulation of sinter cooling in annular cooler
Authors: Ma Shujie , Wang Jingfu
Published: October 2019

Based on the empirical constant value of the thermal physical parameters of sinter, this paper combines experimental measurement and finite element simulation to study the equivalent thermal conductivity of sinter and establish a heat transfer model suitable for the cooling process of sinter. The influence of the empirical value and the change value on the cooling process is analyzed by analyzing the thermal property parameters of the sinter. The effects of sinter size and inlet air temperature on the cooling process are investigated by using varying thermal physical parameters. The results show that the smaller the particle size is, the higher the inlet air temperature is, and the higher the waste heat utilization rate of the outlet heat exhaust gas is.
Leakage Analysis on Non-axisymmetric Gasket of the Shelltube Heat Exchanger Header
Authors: Zhang Xu , Zou Xianping , Zhu Kai , Zhu Zhenglong
Published: October 2019

This paper focuses the flanged static sealing structure of shell-tube heat exchange header, builds an static sealing model based on FEM(Finite Element Method),studies the effect of bolt preload and working medium load on the gasket actual contact stress. The results indicate that: an approximately linear relationship exists among the gasket contact stress, bolt preload and working medium load. When the pressure is gradually increasing, the flat end-plate’s outward convex deformation results in the decreasing gasket stress in the center and even leakage. After locating the above leakage reason, the flange gasket structure is improved, and the bolt distribution and bolt preload is adjusted accordingly. The problem of leakage has been solved, approves that the calculating method of gasket sealing is an effective approach.
Research on fractal dimension calculation method of machining surface based on wavelet transform
Authors: An Qi , Suo Shuangfu , Zhao Xingru , Shi Jianwen
Published: October 2019

Combining the multi-scale analysis ability of wavelet with the multi-scale self-similar feature of fractal, multi-scale wavelet decomposition of fractal contour, based on logarithmic wavelet spectrum, and then evaluating the fractal features of contour and calculating its fractal dimension, The calculation method of fractal dimension logarithmic wavelet spectrum of machined surface contour is compared with the calculation error of power spectral density method and structure function method. Finally, it is applied to the calculation of fractal dimension of actual machined surface contour, which shows its practicability.
Study on Mechanical and Electrical Coupling characteristics of Milling system based on CMAC-PID Compound Control
Authors: Tao Lin , Zhao Yue , Liu Aoxiang , Zhao Yuan , Zhao Jinfang , Liu Yefeng
Published: October 2019

Taking boring and milling machining center as the research object, analyze and optimize the dynamic characteristics of milling control system. Use Simulink software to create mathematical model and simulate the dynamic characteristics of milling control system. Based on the theory of CMAC, consider the theory of the CMAC-PID compound control in the way of M function in Simulink Control language. Apply the theory, calculate the relevant parameters of milling system and model its transfer function, and all the parameters are solved by CMAC-PID compound control in Simulink. Verify the optimization of milling control system, and obtains the method of optimizing the mechanical and electrical coupling characteristics based on the CMAC-PID compound control theory.
Portrait matching based on sift features
Authors: Li Xingxing , Luo Jun , Duan Chao , Yin Panpan , Zhi Yan
Published: October 2019

Image matching refers to identifying homonymous points between two or more images by a certain matching algorithm. For example, in two-dimensional image matching, by comparing the correlation coefficients of the windows of the same size in the target image and the search image, the central point of the window corresponding to the maximum correlation coefficient in the search area is taken as the key point. In this paper, SIFT operator is used for image matching. The experimental results show that the method can effectively match the target.
Effect of Annealing Temperature on Microstructure and Properties of 8011 Cold-rolled Sheet
Authors: Shi Chen , Wu Yongjun , Mao Daheng , Li Fan , Shen Ke
Published: October 2019

8011 cold-rolled sheets with a deformation of 78% were annealed at different temperatures. The effect of annealing temperature on the microstructure and mechanical properties of cold-rolled sheets were analyzed using metallographic microscope, SEM, microhardness testing machine and tensile testing. The results show that with the increase of annealing temperature, the degree of recrystallization increased, the distribution of particle size and precipitated phase were more and more uniform, the elongation of 8011 cold-rolled sheets increased gradually while the hardness, tensile strength and yield stress decreased constantly. When annealing at 350°C, the microstructure of 8011 cold-rolled sheets was fine and homogeneous equiaxed grain structure, and the anisotropy index was the lowest. The optimum annealing temperature of 8011 cold-rolled sheets was about 350°C.
Research on Formation of Oscillation Marks from Continuous Casting of Automobile Steel Plate and its Solidification Process Simulation
Authors: Zhang Hongwei , Jia Qiyang , Ren Tingzhi , Lv Jingru , Zhang Jianhao
Published: October 2019

This paper expounds that the influence of oscillation marks of steel billet on the fatigue strength and the tensile strength of steel plate used in automobile, and the mold model with meniscus in the Crystallizer was established by MSC.MARC software. The solidification law of the shell and the solidification process at the meniscus region are analysed through the temperature field simulation results, which validates that the solidification simulation results of the shell at the meniscus were consistent with the actual production. Changes of initial freezing point position at the meniscus at different drawing speeds are researched, Indirectly the relationship between the depth of oscillation marks and the drawing speed was analysed, At the same time, the relationship between the initial solidification point and the drawing speed was plotted.
Abnormal Judgment of Blade Machining Process Based on SVDD
Authors: He Shuai , Chen Fumin , Yang Yatang , Li Jianhua
Published: October 2019

Aiming at the problem of stability monitoring of blade processing, this paper proposes a method to judge the stability of blade machining process. The measured point deviation of the blade pattern can represent the processing quality of the blade. Firstly, the dimension of the normalized deviation is reduced by the kernel principal component analysis, and appropriate kernel functions and parameters can be determined. Eigenvectors of samples are trained by support vector data description, and the parameters of model are determined with false alarm rate. In addition, the radius of hyperspheres are calculated to obtain control limits. The example data is applied to verify the feasibility of the method. The experimental results show that abnormal fluctuation of blade machining process can be effectively detected by the method.
Design and multi-body dynamics analysis of a four-claw spherical stabilization platform based on Adams
Authors: Xue Shan , Liu Zhengbin , Zhang Zhen , Li Guangqing , Lv Qiongying
Published: October 2019

Airborne photoelectric stabilization platform is one of the most effective devices to isolate aircraft motion from tracking and scanning equipment. In order to make the airborne photoelectric stabilization platform lighter in weight and better in performance, a four-claw spherical stabilization platform is designed. The multi-body dynamic analysis of the four-claw spherical stabilized platform is carried out to verify whether the designed platform meets the functional requirements, that is, whether the four-claw spherical platform can isolate the movement of aircraft and whether the spherical platform can rotate around the pitch axis and azimuth axis. SolidWorks software is used to build a three-dimensional model of a four-claw spherical stabilized platform. Then simplify the three-dimensional model of the platform, import Adams software, carry out multi-body dynamic analysis of a four-claw spherical stabilized platform, verify whether the platform can meet the function. The analysis results show that the designed four-claw spherical stabilized platform can isolate the motion of the aircraft and rotate around the azimuth axis and pitch axis to meet the function, which provides a reference for the design of similar platforms.
Application Research of a Practical and New Intelligent Question Answering System
Authors: Zhou Hua , Tan Yaofei , Wei Luyang , Chen Gangyi , Peng Lin
Published: October 2019

Intelligent question-answering system (IQAS) can help users quickly retrieve the answers to the required questions which is currently a popular research direction of NLP. This paper combines the research of relevant scholars and the analysis of their advantages and disadvantages, and an intelligent question-and-answer system is designed, which can automatically generate a question-and-answer knowledge base based on a given document. It can retrieve the knowledge base and recommend answers automatically, quickly and accurately according to the keywords provided by users. The system realized text semantic understanding and analysis, and its MRR value reached a satisfactory 0.7381. At the same time, the paper extends an automatic answer text generation technology based on Seq2Seq model, which can be a useful supplement to the traditional question-and-answer recommendation generation strategy.
Augmented Reality Based Visualization Method for Spacecraft Cable Assembly Process
Authors: Chen Huajun , Chen Changyu , Sun Gang , Wan Bile
Published: October 2019

At present, the spacecraft cable assemble process has problems such as inconvenient process reading and great difficulty for process understanding. Based on the advantages of augmented reality technology, this paper proposes a visualization method for spacecraft cable assembly process to solve these problems. Firstly, the tracking method based on Vuforia and SLAM technology is used to improve the accuracy of registration while expanding the tracking range. Secondly, this paper adjusts and lightweights the spacecrafts design model, uses Unity3D to create visual guidance, and then deploys the prototype system to HoloLens. Finally, verifies the application in the cable assembly process of a certain type of spacecraft, which proves the advantage of the method based on the augmented reality.
Research on Three Kinds of Swing-plate Manipulators Based on Hydraulic Reclaimer and Non-standard Machine
Authors: Lei Zhao , Lai Hu , Hua Zhang , Ning Ding , Hua Chen
Published: October 2019

Aiming at the problems of low efficiency of hydraulic press reclaiming and the difficulty of realizing the diversification of reclaiming methods in our country. In this paper, three non-standard manipulators of hydraulic reclaimer are designed, and the modes of three non-standard manipulators are analyzed and studied. Using ANSYS workbench to simulate the modal parameters of one of the manipulators, the modal parameters and the actual performance of the manipulator are analyzed. The results show that the first order modal value is 2.0542 e-003Hz according to the modal value. At the same time, combined with the actual working conditions of the hydraulic press, the mode satisfies and is far greater than the fixed frequency value.
Research on Modeling of Equipment Damaging Casued by Environment Factor with the Disteibution of Weibull
Authors: Su Xiaobo , Gao Qi , Wu Qingchun
Published: October 2019

Working environment is one important factor to equipment failure. In order to quantity the environment influence to equipment failure, this paper qualitatively analyzed some environment factors’ effect to equipment failure and drew the graphs about the relationship between equipment failure and environment factors. Based on bathtub curve principle, progressively increasing curve and Weibull distribution principle which are basic theories in reliability engineering, this paper built a mathematical model about environment influence to equipment failure and put forward a calculating method to the unknown parameters in the model.
Node Design of Wild Unmanned Alert System Based on Dempster Shafer Evidence Theory
Authors: Li Jian , Pan Zhongming
Published: October 2019

Unmanned alert system is widely used in unattended surveillance, indoor security, battlefield situational awareness and wild fortress defense. However, due to the complex geographical conditions, poor information environment and various sources of interference in the wild, the design of wild unmanned alert system is more demanding. This paper took the design of the unmanned alert system nodes as the background, designed the pyroelectric infrared sensor, the microwave induction displacement module and the flame sensor. The algorithm used the Dempster Shafer evidence theory to fuse multi-sensor information, which realized energy-saving and stability of the wild unmanned alert system. Experiment shows that the node of wild unmanned alert system has strong anti-interference ability, and it can effectively realize the alert function.
Research on Smart Grid Load Forecasting Cloud Platform Based on Hadoop Architecture
Authors: Qian Lin , Xu Mingjie , Yu Jun , Zhu Guangxin , Wang Lin , Chen Haiyang , Mei Zhu
Published: October 2019

In view of the shortcomings and shortcomings of traditional smart grid load forecasting system, this paper uses Hadoop architecture to build cloud computing platform, optimizes the layout and architecture of the entire smart grid load forecasting cloud platform, and forms the main framework. The basic coordination model is used to carry out multi-level coordination and optimization service, and its practicability is proved by an example. Through the research on the framework of the smart grid load forecasting platform based on cloud computing, improving the level of load forecasting can deepen the application of cloud computing in power system, lay a solid foundation for smart grid dispatching and load balancing, and provide a strong guarantee for the stability analysis of online upgrade of the system.
Research of Co-Sn alloy as Anode material for lithium ion battery
Authors: Zhang Wenhua , Liu Ping , Zhang Xingwang , Ouyang Zhizhao
Published: October 2019

The CoSnx alloys with different atom ratio (x=2, 4, 8) were prepared by solid phase reduction reaction through mechanical ball milling. The structure and morphology were represented by X - ray diffraction (XRD) and scanning electron microscopy (SEM). the elctrochemical performance of the alloy as anode material of li-ion battery was investigated by assembling the analog battery.The experimental results reveal that the nanostructured amorphous CoSn4 shows a relatively high initial discharge capacity (430 mAh/g) and good cycling performance, as its capacity still maintain at 360 mAh/g after the 15th cycle, with a capacity retention ratio of 84 %.
Partial Study on the Genesis of Nucleosome Localization in Drosophila
Authors: Li Zehua , Ling Yongfa , Liu Xiaoyu
Published: October 2019

This paper has done some research on the nucleus localization of Drosophila in embryonic stage. It is found that the influence of different factors on the location of nucleosomes is not the same. It includes not only the physical properties of DNA, such as DNA twist, roll, tilt, and slide, but also other factors, such as DNA bending ability, CG content, transcription factors, RNA polymerase, and others. Here we carry out regression analysis on these factors, we finally get the weight of these factors in the nucleosome positioning process fitting by LASSO algorithm.
Research on the planning and optimization model of regional integrated energy supply system
Authors: Ye Jiawen , Wu Haoyu , Wang Yuqing , Zeng Ming , Wu Shengyu , Wang Shiju
Published: October 2019

Integrated energy system is an important development trend of energy system in the future. As an important form of integrated energy system in local areas, regional integrated energy system has the complex characteristics of multi-energy supply. Therefore, this paper studied the planning model of regional integrated energy supply system. Firstly, the planning index system of regional integrated energy supply system was constructed. Secondly, based on the planning index system, considering the multiple constraints of power grid and heat grid, a regional energy supply system planning model was established to realize the minimum comprehensive cost of investment, operation, economy and environment. Finally, the example shows that the proposed planning model has better economic performance than the traditional planning scheme.
Research on Heat Transfer in High Temperature Garments
Authors: Wan Yi-Fei , Lin Peng-Yi , Li Hao-Yi , Dai Chang-Ping
Published: October 2019

This paper describes the Law of heat transfer between the layers of material and a method for determining the thickness of layers of material parameters of a high temperature protective clothing. Three important choice of protective clothing material and the air gap layer as the research object, based on the Fourier law and the energy conservation law to establish second order partial differential equation, solving the Crank-Nicolson method by second order partial differential equation, derived temperature, time, the relationship between the thickness. Finally, in the case where the heat transfer ANSYS software simulation under the above conditions, a comparative analysis with calculated transfer law, the error is 1.2%, higher accuracy results.
Wireless Charging Self-Starting Electric Trolley
Authors: Zhao Fengyu , Wu Yingyue , Qi Fangxu , Wang Xinyu , Zhu Leifeng
Published: October 2019

Wireless charging electric car includes: wireless charging module (transmitting end, receiving end), used to wirelessly charge the electric car to charge the farad capacitor installed on the car, so that the car can walk in a horizontal straight line. Farad capacitor for energy storage devices after wireless charging. The self-starting circuit is connected to the farad capacitor and is used to judge the automatic driving when the charging is disconnected. Through this car model construction, the wireless charging self-start mode is realized, which solves the complexity of manual operation and simplifies operation.
A Design of The Underwater Acoustic Beacon Detection and Location Method
Authors: Qu Jiasheng , Han Hui , Yang Shanshan
Published: October 2019

Aiming at the search of the underwater acoustic beacons used in aircraft or ship parameter recorders, this paper mainly introduces the underwater acoustic beacon detection and location method of the short baseline array system. According to the signal form of underwater acoustic beacon, this paper discusses the basic algorithm and the engineering algorithm applied in this system. In theory, the basic algorithm is a necessary algorithm for short baseline array to calculate target azimuth, which including the two-element linear array direction measurement algorithm, two-direction cross-location algorithm and the virtual direction discrimination algorithm. In addition, according to the experience of offshore operations, this paper introduces the engineering practice methods such as the angle measurement, the data extraction, the location ray screening and the location ray starting point coordinate calculation. The combination of engineering algorithm and basic algorithm can effectively reduce the impact of the test equipment and environment, and improve the accuracy of underwater acoustic beacon detection and position, which has been tested in actual operation at sea.
Discussion on the Process of Preparing Ammonia by Pyrolysis of a Urea
Authors: Su Jingcheng , Xue Fangming , Chen Feng , Sun Yiqing , Liu Xiuru
Published: October 2019

The process of preparing ammonia gas by urea pyrolysis is often used in denitrification of coal-fired power stations. Because of its safe and stable operation and low investment price, it is widely studied and used. This paper analyses the equipment and site layout of ammonia steam process by conventional urea pyrolysis. Give professional advice on new or rebuilt power plants.
Comparison of Polar V800 with Healink R211B for the Purpose of Analyzing Heart Rate Variability
Authors: Xu Hong , Chen Jingwen , Dai Jingyue , Lin Huiting , Zhang Genxuan , Shi Bo
Published: October 2019

Heart rate variability (HRV) is generally accepted as the best method to evaluate the function of the human autonomic nervous system. This paper compares the differences between the Polar V800 and the Healink R211B in the application of HRV analysis. Twenty-nine healthy college students participated in the study. The data were recorded simultaneously by both devices from all the subjects in a resting state. After being processed, the RR interval (RRI) data for 26 of the cases from the two devices were imported into the Kubios HRV software and were approximately consistent in regards to the HRV parameters. There was no significant difference (r > 0.99, p > 0.05) between the two devices except for the α1 parameter (p = 0.021). For the other 3 cases, the Polar V800 RRI could not be corrected due to partially missing data. Therefore, the HRV analysis and comparison were not conducted. The results indicate that the Polar V800 and the Healink R211B combined with Kubios HRV software can be used for HRV analysis in the time domain, frequency domain and for partial nonlinear parameter analysis, except in cases where data were missed by the Polar V800. However, it should be noted that approximately 10% of the samples from the Polar V800 have more RRI values missing so the entire sample data could not be used for HRV analysis.
Experimental Study and Fuzzy Prediction of Surface Bulk Negative Pressure Collection
Authors: Yang Dan , Liang Xiaodong , Chen Zhongkai , Sun Ye , Yin Fenglong
Published: October 2019

The surface loose sand with particle size less than 10mm was used as the experimental bulk material, and the negative pressure collection experiment of surface bulk material was carried out by using the rectangular nozzle. The influence of collection parameters such as the system air volume, nozzle movement speed, and suction nozzle height above the ground on the sand collection thickness was studied. The research shows that the collection thickness of bulk material increases with the increase of system air volume and is proportional to the second power of system air volume. The collection thickness decreases with the increase of the moving velocity of the nozzle and is proportional to the -0.5 power of the moving velocity of the nozzle. The collection thickness decreases sharply with the increase of the height above the ground of the suction nozzle, and is basically 0 when the height above the ground is greater than 20mm.The mathematical model of the relationship between sand collection thickness and collection parameters is established by using fuzzy reasoning method. The accurate prediction of sand collection thickness under given collection parameters is realized by rule inference. Experimental results show that the prediction error is less than 10%.
Research on the Status and Transformation of Jiangsu’s Petrochemical Industry Trade in the New Era
Authors: Dong Haiying
Published: October 2019

The development of Jiangsu’s petrochemical industry trade was analyzed. The scale of Jiangsu’s petrochemical trade remained stable and the trade was in a deficit state. The overall industry had a trade competition disadvantage, but the competitiveness was increasing year by year. Jiangsu should actively promote the transformation and upgrading by docking the needs of the Belt and Road, promoting enterprises to go global, focusing on building a new petrochemical industry, and promoting industrial standards to international standards, relying on the Internet to expand online channels and cultivating composite international talents.
An Analysis of the Mechanism of the Self-Increasing Brake System
Authors: Kong Xiangfa , Zou Haixin , Lu Jun , Wang Yuxing
Published: October 2019

The auxiliary brake is closely associated with the safety of passengers. Despite the issues of insufficient braking torque and excessive impact in the existing auxiliary brake, the self-increasing brake system has the characteristics of stable and reliable braking in favor of passengers’ safety. It is of great significance to study the mechanisms in the self-increasing brake system. In this paper, kinematic analysis along with mechanical analysis is used to study the braking torque under both static and dynamic conditions. The equivalent braking torque test and braking deceleration test are also conducted to evaluate the braking performance. It is shown that the braking in down direction conforms with the regulations. Researches have indicated that, even under the circumstance of a small theoretical value of braking torque, the self-increasing brake still meets the norms with a stable braking process as well as a limited impact, thanks to the combined effect of self-increasing torque. It can be seen that the self-increasing torque can directly influence the braking torque and the maximum deceleration.
Research on the Construction of Logistics Informatization Evaluation System for Large State-owned Energy Enterprises
Authors: Zhang Hui , Zhang Xiaoming , Gu Fangmeng
Published: October 2019

Through the analysis of the status quo of informationization of energy logistics system, this paper builds a logistics information evaluation system for large state-owned energy enterprises. The evaluation system consists of four major criteria: information infrastructure construction status, business operation status, customer service status, cost and profitability. The entropy method and analytic hierarchy process are used to determine the weight of the indicator evaluation system. The qualitative and quantitative analysis methods are used to establish the evaluation system. Comprehensive evaluation model. Finally, it puts forward opinions on improving the informationization of energy enterprise logistics.