bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on iris location based on improved particle swarm algorithm and sub-regional noise reduction
Authors: Wenyu Zhu 
Published: October 2020

Abstract
Iris localization is the basis of iris recognition, iris medical diagnosis and other technical fields. In view of image of Asian iris, according to the characteristics of the human eye pupil, the combination method of image back-complement enhancement and improved particle swarm optimization is firstly adopted to fit and locate the inner circle of iris. Then, combined with the characteristics of the outer iris boundary, the outer iris circle is located by using the method of sub-regional noise reduction and improved particle swarm optimization. Meanwhile, coordinate transformation approach is introduced for normalization of image. Finally, the feasibility of the method is verified by using iris library of Chinese Academy of Sciences and the self-built iris library sample. This study successfully overcomes the interference of the spot in library and can efficiently complete the segmentation of the iris region.
Simulation design and optimization of production line of a cross axis machining based on Plant Simulation
Authors: Changhong Yu , Songqing Cen , Silin Luo 
Published: October 2020

Abstract
In order to study the operation process and results of an actual intelligent production line, Plant Simulation was used to simulate the production line of a cross shaft. First of all, the basic layout is modeled, 3D model is used, and the actual machine model is imported or designed to make the effect more realistic. This study analyzed the production process, created orders according to customer requirements, used Simtalk language to complete the simulation logic of the model, and displayed the simulation data in the form of charts after the operation, so as to make the results more intuitive. Finally, the results are analyzed and optimized.
Research on Design and Simulation of Compound Voltage Quality Regulator
Authors: Zhang Guomin , Zhen Xiaoya , Man Hongwei 
Published: October 2020

Abstract
A voltage regulator based on cascaded multi-level structure is proposed. Based on the analysis of its working principle, the voltage quality problems (voltage sag, swell, voltage harmonics, Fluctuation, flicker) in the power quality appearing in the distribution network, the main circuit topology, control methods and compensation strategies are proposed. The regulator can compensate for various voltage quality problems. To ensure that the voltage quality is within the rated range, a simulation model of a cascaded multi-level composite voltage regulator is established in the simulation software, and it is verified that the design scheme proposed in this paper can solve various voltage quality problems in the distribution network.
Research on Mechanical Design Based on Rationalization of Mechanical Manufacturing Process
Authors: Yi He 
Published: October 2020

Abstract
The advancement of science and technology in China has promoted the economic take-off. As an important part of the secondary industry, machining and manufacturing play an irreplaceable and important role, which is widely used in major fields. Many industries are moving towards the production of fully automobile machinery. The use of advanced automobile mechanical manufacturing technology has greatly improved the productivity, reduced manpower input and costs while ensuring product quality, and achieved the goal of maximizing economic benefits.
Research on Time-Varying Mesh Stiffness of Double Involute Gears
Authors: Yin Zhaoming , Fan Zhimin , Jiang Feng 
Published: October 2020

Abstract
The tooth of double involute gear (DIG) is considered as a cantilever beam on the tooth root circle, considering the real tooth profile of DIG, an improved energy method is used to solve the time-varying mesh stiffness. The influence of tooth waist order parameters and the difference of time-varying mesh stiffness between DIG and common involute gear(CIG) are studied. The results show that the time-varying mesh stiffness of the single tooth pair is less than that of CIG with the same parameters when the contact line passing through the tooth waist grading position, and the comprehensive time-varying mesh stiffness of DIG is less than that of CIG. The tooth waist order parameters will affect the time-varying mesh stiffness of DIG, and compared with the tooth waist altitude coefficient (l*), the tooth waist tangential modification coefficient (y*) has little effect on the time-varying mesh stiffness.
Analysis and Research on the Impact of Bullet Head Eccentricity on Air Resistance
Authors: Lin Lizong , Ju Ran 
Published: October 2020

Abstract
Through numerical simulation, the transverse resistance of the head eccentric bullet at 0.29 Ma, 0.58 Ma, 0.97 Ma and the eccentricity angle of 0° ∼5° in the air was studied. When the bullet head deflects and flies at a certain speed, the tip of the bullet produces agitation to the air. This paper tries to find out the angle of minimum resistance by using the simulation software ANSYS when the eccentricity angle of the bullet head is between 0° and 5° degrees, and optimize the shape of the existing bullet. In this paper, three kinds of velocity are simulated. The simulation results show that the resistance of the head eccentric bullet in flight can become smaller. There is always a corresponding head eccentric angle at different speeds to minimize the flight resistance. As a result, the bullet can fly faster and farther.
Study on the test method of rapid change of load current of intelligent electricity meters
Authors: Chen Zhiru , Du Yan , Zhang Zhi , Dai Yanjie 
Published: October 2020

Abstract
With the continuous changes of the working environment of the electric energy meter, the dynamic detection method of the electric energy meter becomes more and more important. Therefore, in recent years, the IEC 62052-11 Standards Committee has proposed to add a rapid change test of electric energy meter load current. This article proposes an effective dynamic test method according to the requirements of this regulation standard, builds an electric energy meter dynamic error test platform and develops a software test system. An anti-submarine mechanism is proposed for the electric energy measurement algorithm of the smart meter, and the load current rapid change test of various electric energy meters from different manufacturers at home and abroad is tested, and the correctness of this test method is verified.
System Resilience construction Model of Human-automation Manufacturing Process
Authors: Chen Ke , Song Li 
Published: October 2020

Abstract
Despite increasing automation levels and digital solutions, manufacturing process safety still very much rely on the inescapable contribution of the human factor. The changing relationship between man and automation system together with the increased complexity result in high risks for process safety. From time perspective, the resilience of a manufacturing system shows a curve divided into dimensions: adaptability, recovery and innovation. Perceptual stance, contextual integration and decision making and doing are made up of system resilience elements. As a socio-technical system, a human-automation manufacturing system may strengthen resilience by considering both technical and organizational sides.It is an effective approach to construct manufacturing system resilience by assigning the functions according to the task, the operator, and the situation considering the system dynamics.
A sequence-based visual place recognition method for aerial mobile robots
Authors: Yang Minzhou , Mao Jun , He Xiaofeng , Zhang Lilian , Hu Xiaoping 
Published: October 2020

Abstract
Recent developments in sequence-based visual place recognition (VPR) have shown robust localization capability on ground vehicles; however, deploying existing sequence-based VPR techniques on aerial mobile robots is still challenging, as topologically ordered database is not available for aerial agents. In this paper, we develop a new sequence-based VPR algorithm, which is applicable to aerial mobile robots. The proposed method models the agent’s position as a probability function conditioned on all the visual observations and accumulates the position belief as the observation increases, which helps to filter out the inconsistent false recognitions. To testify the effectiveness of the proposed method, we have conducted series of experiments under different visual environments. The experimental results show that, by using a remote sensing image as reference and onboard downward-looking camera images as observations, the proposed method can robustly estimate the position of the agent and have a localization rate 30% higher than the single-image-based VPR algorithm.
Optimal design of concrete automatic distribution system for digital manufacturing
Authors: Yu Yongpeng , Ji Shuai , Chen Jiwen , Wu Chong 
Published: October 2020

Abstract
Concrete distribution system is an important production equipment to realize the development of prefabricated buildings. In order to realize the development of building industrialization and residential industrialization, considering the problems of intelligent and low automation of concrete distribution system, by perfecting the structural design of automatic distribution system, it is oriented towards digitalization. Manufacture, analyze and select the control of the opening of the distribution valve and the parameters of the distribution shaft, and put forward measures to optimize the overall mechanical structure of the distribution hopper of the distribution machine; establish the relationship model of the hopper moving speed of the concrete distribution machine, the speed of the spiral distribution shaft and the thickness of the distribution, to complete the optimal design of the motion parameters of the concrete distribution system. Based on the finite element analysis of the supporting beams, the feasibility and effectiveness of the overall optimal design of the concrete automatic distribution system were verified.
Research on Automatic Cleaning Equipment with High Pressure Water Jet for Optical Pipelines
Authors: Yang Biying , Lian Kenan , Zhao Yunwu , Zhu Jianping , Guo Ang 
Published: October 2020

Abstract
In order to solve the problems of high labor intensity, low efficiency, and unstable cleaning quality when cleaning optical pipelines with traditional manual high-pressure spray, automatic cleaning equipment with high pressure water jet for optical pipelines is designed. The working principle and the design points are introduced. The movement rule of the nozzle under self-propelled drive is analyzed by ANSYS, the results show that the self-propelled drive cannot meet the cleaning speed requirements. Therefore, the wire rope driving method is proposed to realize the control of the nozzle speed. Subsequently, the speed of the simulated water jet is analyzed by the STARCCM, it is inferred that the water jet is still in the basic section at the maximum target distance of the pipeline, which can be used for cleaning. For verifying the cleaning effect, the prototype is applied to the cleaning of the actual optical pipelines. The verification results show that the cleaning equipment can meet the requirements of 100 / class clean, and the efficiency is increased by 70% compared with the traditional manual high-pressure spray.
The Evaluation and Research of white light interference profiler about the measurement uncertainty
Authors: Hu Chang’an , Tang Yan , Sun Haifeng , Liu Lei , Hu Song 
Published: October 2020

Abstract
The optical resolution of the white light interferometer characterized by higher sensitively and accurately with 580nm wavelength approximately is 5nm. However, as a new non-contact measurement equipment, the white light interferometer has certain measurement errors. In this paper, we propose a novel method that the accuracy of the white light interference profiler is evaluated by measuring the nano grating standard structure. The standard step height and pitch sample were used in the measurement process, and the morphological characteristics of the sample were obtained by Fourier transform, phase modulation and phase splicing of the sampled data. The experimental results show that the horizontal and vertical extension uncertainty of the white light interference profiler is 174nm and 8.07nm, respectively.
A Power Optimization Control Method Based on IMC for 3D Printer
Authors: Xie Ruidong , Yang Haichuan , Yi Yingmin 
Published: October 2020

Abstract
Aiming at the effect of selective laser sintering technology used in 3D printing, the recursive least squares method was applied to fitting a control system model for quantification the relationship between laser power and corresponding temperature in this paper. The internal model control method is considered based on the establishing model. The controller is put into the actual 3D printing power control system for controlling the laser power. In the experiment, both internal model controller and the PID controller for the 3D printer are researched and deployed for comparing the their effects in the paper. The experimental result illustrates that the IMC based on the recursive least squares method is of effectiveness.
Research and test of key components of the squirrel-cage bullet shell counter
Authors: Yaxin ZHANG , Hua XU , Renggui LIU , Wanmin LI 
Published: October 2020

Abstract
In order to solve the problem of counting when the bullet shells is recovered, a kind of squirrel-cage bullet shells counters is designed. Through theoretical analysis and test, The angle of the bullet slot of the squirrel cage shell counter is 31.3 ° and the rotation speed of the cartridge mechanism is 10 R / min. The squirrel cage shell counter has the advantages of simple structure, few components, 3D printing technology, greatly reducing the weight and power consumption. The whole machine test results show that: The counting efficiency of the slot type bullet shell counter is 87.4 pieces / minute, and the counting accuracy is 99.8%. The counting efficiency and precision of the slot type bullet shell counter can meet the design requirements of the army. This research not only provides a practical shell counting tool for the military, but also provides a reference for the innovation, research and optimization design of other similar mechanical equipment.
Static characteristics and influencing factors analysis of azimuth axis of a radar antenna pedestal
Authors: Guang WEN , Ming CHENG , Xianchun TANG , Xinhui JIANG , Xuerong ZHANG 
Published: October 2020

Abstract
Azimuth axis is an important part of radar antenna support. Static characteristics were analyzed with the help of finite element software. And the stress and deformation distribution of the structure under the normal working load were obtained, and the influence of the size parameters of the azimuth axis structure on its static characteristics was also investigated. Through the analysis, it is found that the maximum stress value of the azimuth axis under the working load is less than the allowable stress of the material, and the strength meets the use requirements. With the increase of size parameter l3
and d11
, the maximum stress of the shaft decreases gradually, and increases with the increase of size parameter d32
. The analysis results provide data reference for further optimization of the azimuth axis.
Mapping the field of Building Information Modeling(BIM) based on bibliometric analysis
Authors: Huang Yunping , Yan Jinjiang , Chen Lingling 
Published: October 2020

Abstract
Building information modeling(BIM) makes great contributions to empowering the construction industry and it has been adopted widely in many fields. To capture existing circumstance and future trend of BIM in the perspective of bibliometric analysis, we analyse 1247 papers related to BIM publications which are collected from the Web of Science database with time span defined as “all years”. Results concerning the publications and its citation structure, the network of co-authorship in countries/region and institutes, the network of co-citation in cited references, and keywords co-occurrence are presented in this paper, and VOSviewer software is used as a visualising analysis tool. This paper not only summarizes the research progress of BIM but also provides a useful method for the future evaluation of construction field.
Application of green energy saving technology in construction engineering
Authors: Wu Wei 
Published: October 2020

Abstract
This paper introduces the basic concept of green energy-saving technology in architectural design. The necessity of applying green energy-saving technology in building engineering construction is also described. The application of green energy-saving technology in roof doors and windows, wall insulation, circulating water pump heating, clean energy and heat pump application are presented. All these works broadens the way forward of building construction and lays a good foundation for the development of construction industry.
Influence of transmission tower load under extreme conditions during operation period on the stability of landslide and tower foundation
Authors: Yingbo Zhou , Hang Chen , Qiupeng Zhou , Zhiqiang Duan , Xiaojing Gao 
Published: October 2020

Abstract
Taking Yanzi landslide and 500 kV transmission tower foundations on the landslide as the research object, this paper presents a study of the influence of transmission tower on the stability of landslide and tower foundation under extreme conditions during operation period. Firstly, the ultimate loads of transmission tower foundation under different operating conditions are determined. Secondly, based on the limit load of transmission tower, the overall and local stability of Yanzi landslide is analyzed. Finally, the disturbance of tower foundation load state on soil around the tower foundation and the change of tower foundation displacement are studied. The results show that, with the increase of wind speed, the tower foundation load In addition, under the action of wind load, the soil around the adjacent tower foundation basically does not affect each other, the maximum displacement of tower foundation does not exceed 0.5 mm, and the maximum inclination rate of tower foundation meets the requirements of cod.
Marine hazards from 2000 to 2016 in Zhejiang province of the subtropical region, South China
Authors: Guo Jiamei , Heng Fuxin , Huang Zhilei , Qi Shanzhong 
Published: October 2020

Abstract
Coastal and offshore regions are regarded as the key zones exposed to marine disasters. Zhejiang province, located on the verge of the East China Sea, is one of the provinces mostly affected by marine disasters that have brought serious economic losses and casualties. The data of marine disasters in Zhejiang province, which occurred during the period from 2000 to 2016, were selected and analyzed. The results indicate that (1) storm surge, wave, and red tide are the main kinds of marine hazards in the coastal region of Zhejiang province. (2) a total of 1,099 marine disasters occurred in the coastal region of Zhejiang province during 2000—2016, and resulted in about 275 deaths or missing with 18.544 billion yuan of direct economic losses. In addition, marine disasters are mainly distributed in Zhoushan City, Ningbo City, Taizhou City, and Wenzhou City of Zhejiang province.
Near real-time detecting of atmospheric water vapor content based on BeiDou Navigation Satellite System
Authors: Guo Qiuying , Hou Jianhui , Chen Shihai , Sun Yingjun 
Published: October 2020

Abstract
With the improvement of Beidou navigation satellite system (BDS), real-time monitoring of atmospheric water vapor content based on BDS has become a research hotspot. BDS and GPS observation data of seven MGEX CORS stations were processed using GAMIT10.71 software and the atmospheric precipitable water vapor (PWV) was estimated. The PWV/BDS using Beidou final precise ephemeris and ultra-rapid precise ephemeris was respectively compared with PWV/GPS using IGS final precise ephemeris. The experiment results showed that the PWV/BDS is in good agreement with the PWV/GPS. The standard deviation (Std) of the PWV/BDS based on Beidou final precise ephemeris and ultra-rapid precise ephemeris are respectively 2.91mm and 3.97mm. And the RMSE of the PWV/BDS based on Beidou final precise ephemeris and ultra-rapid precise ephemeris are respectively 3.97mm and 3.85mm with the PWV/GPS as the reference value.
Research on Computer Network Teaching Reform Based on Simulation Software
Authors: Wang Jiong , Zhang Hua , Wu Zhengyuan , Xu Ge 
Published: October 2020

Abstract
This paper first analyzes the concept and development status of computer network technology, then expounds the problems existing in computer network practice teaching, and finally makes an in-depth analysis on how to formulate strategies to solve the problems existing in computer network practice teaching, including the detailed discussion and planning on the reform of course examination methods, the improvement of course setting and the study of software and hardware. Based on the current situation of computer network development in China, the practical teaching of computer network is continuously improved, which makes this course carry out smoothly in teaching.
Students depend on the Pythagorean theorem: Analysis by the three parallel design of abstraction thinking problem
Authors: Alghadari F , Noor N A 
Published: October 2020

Abstract
Based on students’ geometry knowledge, there are contrast and less relevant skills goals being prepared for the students. Students are more dominant in learning how to apply procedural knowledge so there is a need for students to use the Pythagorean theorem when facing a triangle properties problem. Therefore, this case study aims to analyze how students’ conceptual knowledge depends on the Pythagorean theorem. The analysis uses a cognitive diagnostic assessment framework through the three parallel design of abstraction problem. This study was conducted for students at the senior high school. The findings are the Pythagorean theorem as a result of thinking abstraction at least two of the three design problem formations, including for the effect of claims and metacognitive knowledge them. There is a disconnected conceptual system between the products of thought and the claims elicited so that abstraction is not optimal. Development for in-depth understanding of conceptual experience is needed in the instructional intervention so that more adequate reasoning.
Analysis of mathematical thinking skills in multiple intelligence perspectives of primary school students
Authors: Murni S , Ruqoyyah S , Fasha L H 
Published: October 2020

Abstract
This research is motivated by thinking skills and awareness of the importance of mathematics needs to be taught and trained to students from an early age because in daily life many things are related to thinking skills and awareness of the importance of mathematics in everyday life. The purpose of this study is to analyze mathematical thinking skills from the perspective of multiple intelligences of elementary school students. This research uses a qualitative approach and uses descriptive qualitative methods. The population in this study was Grade V Elementary School Students in Cimahi City, while the sample consisted of 20 students. The instrument used consisted of multiple intelligences tests in the form of a questionnaire logical-mathematical, intrapersonal, and interpersonal logic intelligence. The results showed that the intelligence of logical-mathematical and intrapersonal based on multiple intelligences of elementary school students in Cimahi in 2020 each was in the medium category. While interpersonal intelligence is in between medium and low categories.