bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on the Properties of Modified Steel Slag Asphalt Mixture
Authors: Zhou Yan 
Published: October 2020

Abstract
steel slag property reform is the main form of comprehensive utilization of industrial waste resources. Therefore, this paper combines the theory of steel slag surface modification technology, focusing on the expansion characteristics, aggregate effect and other aspects, to explore the performance of modified steel slag asphalt mixture, in order to achieve clear technical points, to achieve the purpose of comprehensive development and application of social resources.
Research on simulation technology of Shipborne Satellite Communication System
Authors: Jin Rong , Zhao Qianhong , Teng Xiaoyun , Liu Mingbo 
Published: October 2020

Abstract
In this paper, aiming at the architecture, key technologies and member functions of the simulation of the onboard satellite system, a simulation federate model with good hierarchical structure is designed, and a satellite communication simulation system based on HLA is constructed. The key problems such as time unification, fault simulation and real-time visual display are solved. Through the functional simulation of the operation process of the Shipborne Satellite Communication System in the distributed virtual simulation environment, the results show that the system has good interactivity and scalability, and is an effective means to test the reliability of equipment and reduce the risk of scientific test.
Improvement of center-correction reset between guide-model switching for shipborne radar
Authors: Zhang Hao , Tao Min , Xia Jiafeng 
Published: October 2020

Abstract
Antenna servo system of shipborne radar has added digital-guide model and mutual-guide model with the support of center correction in order to capture and track targets conveniently. However, the switching between these two models would create larger step change resulting from the non-reset of center-correction. To this point, this paper represents the working principle of digital guidance, mutual guidance and center correction, and analyses the reason of step change. Then an novel approach is presented to improve the reset of center-correction. The results of experiments indicate that it can avoid the step change caused by the existence of center-correction value, and it enhances the reliability of facility effectively.
A Compounding Method for Calculating Stress Intensity Factor of Pipelines with MSD Structure
Authors: Zhao Jinfang , Zhao Qun , Zhao Yuan 
Published: October 2020

Abstract
Multiple site damage (MSD) often occurs during the service of the nuclear pipeline. The typical structure is multiple cracks on circumferential internal surface of the pipeline. In order to evaluate the reliability of the nuclear pipeline and discuss the damage tolerance of the pipeline with multiple cracks, a compounding method for calculating stress intensity factor (SIF) of pipelines with MSD structure is proposed. Compared with the finite element results, the compounding method is accurate and reliable. The SIF of double cracks and triple cracks are studied by using crack spacing as single factor variable. The result shows that the SIF of MSD cracks can be influenced by the crack spacing of the adjacent crack.
Research on the Development Direction of Mechanical Automation
Authors: Ye Weiwen 
Published: October 2020

Abstract
This article analyzes the current application and development status of mechanical automation in many aspects, and proposes that the essential difference between the two is that modern machinery has intelligent features, while traditional machinery does not, and at the same time it shows the advantages and benefits of all aspects of its products. The fierce still can meet the ever-changing needs of people in production and life. This article takes the system as a starting point, and through listing examples and combining the technologies related to mechanical automation, it proposes the stage goals of the automation control module and the development direction of mechanical design and automation in future development planning.
Synthetic Aperture Radar Image Speckle Noise Suppression and Mine Target Detection
Authors: Yi Xiongsheng , Huang Cailun 
Published: October 2020

Abstract
Synthetic Aperture Radar (SAR) provides a comprehensive, all-weather target monitoring function and is widely used in the military and industrial fields of defense. This article mainly studies a landmine target detection technology based on synthetic aperture radar image processing, shallow buried mines. The detection and identification of military radar has important military significance, which can reduce the casualties caused by landmine explosions. This article first introduces the basic imaging principle of synthetic aperture radar, then introduces the noise processing of SAR images based on the Gamma filter, and finally targets the targets of mine SAR images Features were identified and analyzed.
Stiffness Modeling of Cylindrical Hydrostatic Guideways
Authors: Zhu Jinbo , Jiang Shuyun 
Published: October 2020

Abstract
Static stiffness is an important performance index of the cylindrical hydrostatic guideway. In this paper, the static stiffness model of the cylindrical hydrostatic guideway is studied. Considering the guideway is a system with a rail and a hydrostatic bearing in series, firstly, geometric relationship between the displacement of the table and the deformation of the rail and the displacement of the hydrostatic bearing was derived, the mathematical expression of the stiffness was given. Secondly, based on the beam bending deformation theory, the linear superposition principle was used to derive the deformation equation of the rail under the force of the oil film. Finally, the static stiffness test rig was developed. The static stiffness test was carried out and the theoretical model was verified. The results show that the static stiffness model of the cylindrical hydrostatic guideway established in this paper has high accuracy, which can lay a theoretical foundation for the static characteristics analysis of the cylindrical hydrostatic guideway.
Research on Foundation Defect Identification Technology of Transmission Tower Based on SSP Technology
Authors: Zhang Xingsen , Liang Shirong , Li Junhua , Bian Meihua , Liang Qingguo 
Published: October 2020

Abstract
Transmission tower foundation defect identification has become more and more important. However, conventional detection methods are inefficient, which can cause secondary damage to the structure, and are limited by the inability to achieve large-scale detection. For this reason, the SSP technology is introduced in this paper which is applied to the foundation defect identification of transmission tower. Firstly, the feasibility of applying SSP technology to the foundation defect identification of transmission tower is analyzed. Secondly, the field test flow and data processing of SSP technology for foundation defect identification of transmission tower are introduced. Finally, the basic model of a transmission tower is tested to verify the feasibility of SSP technology for the foundation defect identification of transmission tower.
Lower extremity assisted exoskeleton for people who need rehabilitation training and stairs assistance
Authors: Tan Qilong 
Published: October 2020

Abstract
The Assistant Exoskeleton for Lower Limbs are able to help the following three kind of people walk better: People with congenital defects in the lower limbs, those who have suffered major trauma to their the lower limbs, and those who use the lower limbs for work in a high frequency. For the exoskeleton of this project, aluminum alloy is adopted as the main material, high-power steering gear as the driving part, Arduino Uno as the main board, hard plastic as the lumbar support board, and Velcro as a aid for wearing. In order to make the movement of the exoskeleton more flexible without being too rigid, in this project, an extra set of exoskeleton was manufactured to collect motion data, and a program was written to record the movement of people walking. In the end, this exoskeleton device will mainly provide support for the waist, and share the pressure on the legs, so as to can help anyone with walking fatigue and care for people’s waist and leg health.
Synchronous generator fuzzy PID excitation control system
Authors: Dang Xunyi , Yang Xiaoyu , Yuan Shengrui 
Published: October 2020

Abstract
This paper focuses on the design of excitation controller based on fuzzy PID. According to the whole design process, the input and output variables of fuzzy controller are determined. The domain of language variables and membership functions are determined. The selection of quantization factor, average weighted fuzzy method and scale factor in the process of fuzzification; Based on excitation control experience, 49 fuzzy control rules are established.
Design of Control System Based on Electromagnetic Balance Vehicle
Authors: Peng Wenliang , Li Huise , Hu Ying , Zheng Zexin 
Published: October 2020

Abstract
This paper introduces the design of control system of electromagnetic balance vehicle based on kea128. From two aspects of hardware and software, the control system is designed. The hardware layer includes micro controller, vehicle model attitude measurement and road information recognition module. According to the collected information, combined with filtering algorithm and closed-loop control of upright, speed, direction, etc., through repeated practice verification, the balance car can achieve independent tracking, and can maintain upright state under different track elements, fast and stable operation.
H-inf and State Jumps Control for Switched Singular Systems
Authors: Shi Shuhui , Wang Yajuan , Qi Shuang 
Published: October 2020

Abstract
In this paper, the problem of switched singular systems with exogenous disturbance aiming to minimize H
∞ norm bound and inconsistent state jumps when switch occurs between two different singular subsystems is studied. By designing static output feedback controllers, under which the closed-loop system can be admissible (regular, impulse free and stable) as well as minimizing H
∞ norm bound and instantaneous state jumps at arbitrary switching point. The validity of the main result is illustrated by an example.
The application of CAMSHIFT algorithm based on kernel function in laser tracking moving target
Authors: Qu Jubao 
Published: October 2020

Abstract
According to the characteristics of laser technology, a fast moving target tracking algorithm is designed. Using the spatial information of laser diffuse reflection light points, by adding the kernel function of CAMSHIFT algorithm, the weight of light points in the center of the target is increased by using the weighted histogram, so as to improve the convergence speed of the algorithm and the tracking accuracy of the target. The simulation results show that the improved algorithm can adapt to more complex tracking environment quickly and has better anti-interference, agility and prediction ability.
Research on Threshold Characteristics of Telemetry Receive Channel
Authors: Liu Yang , He Jing , Wu Xingcun , He Qian 
Published: October 2020

Abstract
This article first explains the nature of the threshold effect. Combining various shipborne telemetry channels with regard to the threshold input signal-to-noise ratio, which is the most widely used channel test link for detection, a unified and universal calibration method is proposed: modulation calibration and carrier signal-to-noise calibration According to the different background noise of the channel, it is divided into two ways: radio-frequency wired and wireless. The detailed, theoretical, and highly operable test procedures and steps are given. Finally, the dual-mode loop circuit is implemented. The dynamic tracking of the carrier can significantly reduce the threshold effect.
Application of Geometric Eigensubspace Framework in The Characterization of Atomic Structure
Authors: Jia Jikui 
Published: October 2020

Abstract
The specific atomic structure of materials plays an important role in solid-state physics and materials science because it is inherently related to many physical properties of materials. Various structural fingerprints have been proposed to identify the configuration of atoms. They do not depend on the coordinate system and the order of atoms, so they are more convenient than traditional atomic coordinates. They are unique, but they cannot fully describe the structure of the atom. Therefore, we hope to have a notation that uniquely identifies the atomic configuration and contains as much structural information as possible. This paper proposes a novel and intrinsic representation of atomic structure. We first proposed an extended distance matrix to describe the atomic structure of the cluster. It is different from the traditional distance matrix in that the zero of the diagonal element is replaced with the characteristic quantity of each atom to distinguish different elements. The extended distance matrix contains all the structural information of the cluster. In addition to the overall chirality, through spectral decomposition, the position information of the atoms can be discussed based on the eigenvector coordinate system and the eigensubspace framework. Studies have shown that due to the difference in the number of bonds, the Λ
dec
distance between the diamond atom (the number of bonds is 4) and the other two atoms (the number of bonds is 3) is relatively large, about 0.076; graphene atoms and C
60 atoms the Λ
dec
distance is relatively small, about 0.051.
Research and Design of Electronic Measuring Instrument Based on Single Chip Microcomputer
Authors: Zhang Tianrun , He Xi , Hu Linshan 
Published: October 2020

Abstract
This paper studies and designs a high-precision resistance inductance and capacitance measuring instrument based on single-chip microcomputer. It uses MAX038 monolithic voltage control function generator to generate high-precision sine wave signal flow, through the capacitor or inductor and the standard resistance string to be tested. Connect the circuit, use the voltage ratio calculation method to calculate the capacitance value or the inductance value, use the 51 single-chip microcomputer to control the measurement and calculation results, use the 1602 liquid crystal module to display the value in real time, and the sinusoidal signal generator can realize the amplitude and frequency. In order to improve the accuracy, the measured AC voltage is first passed through the ICL7650 to eliminate the error caused by the lower input resistance of the AD637.The experimental test results show that the measuring instrument has stable performance and high measurement accuracy.
The Design and Simulation of Beidou Navigation Receiver LNA in B3 Frequency Band
Authors: Zang Zhibin , Pang Hui , Liao Baoquan , Ji Fulong , Nie Haitao , Yu Zhixi 
Published: October 2020

Abstract
The Beidou satellite navigation receiver needs to receive Beidou signals efficiently in a complex environment, and the design of receiver front-end is the key link. According to the Beidou receiver front-end system indicators, such as noise figure, gain, etc., we propose a low-noise amplifier design scheme which is based on Infineon’s broadband NPN RF bipolar transistor BFP740FED, and employ ADS to simulation and optimization tests. The results show that the low noise amplifier has a noise factor NF < 0.7dB, gain Gain > 35dB, gain flatness less than 0.5dB, input-output standing wave ratio less than 1.5 in the B3 band. This system has high noise performance of the amplifier, which can support the further development of Beidou navigation receiver application.
Simulation Study on Solenoid Valve of Hydraulic Control Unit
Authors: Qian Feng 
Published: October 2020

Abstract
In the research and development and improvement of the wet double-clutch automatic transmission, the hydraulic control unit has always been the focus of attention in the industry, and the working characteristics of the solenoid valve will directly affect the control effect of the hydraulic control unit, which in turn affects the quality of the vehicle’s shifting action. [1]This article is based on a hydraulic control unit, using its rich component library on the AMESim software platform, according to the working principle of the solenoid valve, the simulation model of various types of solenoid valves in the hydraulic control unit is established, and the exploration design module is used to the various parameters in the valve that are not easy to obtain directly are identified based on genetic algorithm, and the parameters in the model are optimized; then the S function is generated through the interface in AMESim, and each solenoid valve is simulated with the help of the numerical calculation ability of Matlab to obtain The simulation results of the solenoid valve working process are presented.[2, 3].
Design of a Shielded Core Current
Authors: Zhao Mo , Wu Wei , Li Jinxi , Guo Jinghai , Liu Yifei , Wang Wenbing 
Published: October 2020

Abstract
Aiming at the problem that the signal noise ratio (SNR) can’t meet the requirement due to electromagnetic interference in the measurement of coupling current of transmission cable core line in electromagnetic pulse environment, a shielded core line pulse current probe is designed and developed. This paper introduces the measuring principle of the probe, the structure characteristics and development situation, given the characteristics of the probe sensitivity and parameters, such as spectrum method and the calibration parameters, and analyzes its usage in the experimental results show that the design of shielded conductor pulse current probe based on the structure of the original transmission has a better ability to resist electromagnetic interference and pulse signal measurement capability.
Reliability analysis of self-developed mechanical Meta action test-bed based on FTA
Authors: Ge Hongyu , Liu Yuan , Liu Baoqiang , Wang Tuo 
Published: October 2020

Abstract
In view of the complex mechanical product assembly failure frequency and difficult to control the problem. In this paper, based on the independent research and development of the reliability test-bed of the mechanical Meta action unit, the reliability of the worm rotation Meta action test-bed is analyzed by the method of fault tree analysis (FTA). Firstly, the structure model of the action assembly unit of worm rotating Meta is established. By analyzing the assembly condition of the action unit and using the principle and steps of fault tree, the assembly fault tree model of the test-bed of worm action unit is established, and the minimum cut set is obtained. On the basis of the minimum cut set, the importance of each assembly behavior is determined by quantitative analysis The basic events are sorted according to the importance degree; each basic event is determined as the reliability control point, and the reliability control measures of the assembly process of the meta action unit are formulated by analyzing the fault source of the reliability control point. Through quantitative analysis, the probability of the top event is 0.163, and the reliability of the experimental device system is 82.7%. The results show that FTA is simple, easy to understand, universal and reasonable in conclusion to analyze the reliability of the self-developed action unit test-bed. The modeling idea, calculation process and analysis method formed provide a reference for the reliability analysis of the self-developed action unit test-bed.
A new type of pneumatic linear reciprocating actuator
Authors: Li Xiaorui , Wang Xingsong , Tian Mengqian 
Published: October 2020

Abstract
A new type of pneumatic linear reciprocating actuator based on the Sarrus mechanism is presented in this paper, which includes an external rigid deployable frame, and an internal flexible foldable bellows-type airbag, and a set of rubber bands. The actuator has advantages of large stroke, small volume, large expansion ratio, and elongation which can be controlled by air pressure. It can achieve reciprocating linear motion with a larger expansion ratio of 800%. This paper first introduces the structure of the rigid frame and airbag, and introduces the manufacturing process of the airbag under laboratory conditions. Then, the theoretical analysis of the actuator is carried out, and the air pressure displacement characteristic formula is introduced. Finally, the correctness of the characteristic curve is verified by experiments.
Development and Application of Hand-held Laser Welding System
Authors: Xin Yanggui , Huang Ye , Gao Shiyi , Li Su , Han Shanguo 
Published: October 2020

Abstract
In this paper, the composition, control mechanism and process control of control system of hand-held laser welding were studied. Based on PLC, galvanometer motor was better protected, control frequency of galvanometer was improved, the system expansibility was enhanced, and functions of continuous welding and continuous spot welding were realized. The application results indicated that the control system not only had the advantages of simple development, short development cycle and comprehensive monitoring, but also simplified the input and operation of parameters, reduced the workload of operators and reduced the operation difficulty of equipment to the greatest extent.
The Development of the Automatic Lifting Gear for precision measurement
Authors: Ruan Guowei , Wang Ziwen , Duan Chenxu , Wang Wei 
Published: October 2020

Abstract
Precision measurement is an important method to evaluate the performance of spacecraft assembly. As flight missions become more complex, precision measurement has become an important link to ensure the reliability of spacecraft [1]. In order to solve the problems of precision measurement instruments required during the precise assembly of some components in the spacecraft assembly process, the installation height is high, the stability is sensitive, the ground measurement site is limited, the types of matching measurement instruments required are large, and the transportation needs are strong. An automatic lifting platform solution for longitude measurement is proposed, and the prototype is tested. The test results fully meet the requirements, which verifies the feasibility of the scheme.
Research on the Reliability Test of a Micromechanical Gyroscope with Full Symmetry Structure
Authors: Li Shen , Chen Lixiang 
Published: October 2020

Abstract
The reliability of micromechanical gyroscope has a great influence on the performance of precision guided weapon. This paper studies the reliability test of a type of micromechanical gyroscope with full symmetry structure. From the perspective of equipment failure prevention, combined with the mapping relationship between the failure mode of micromechanical gyroscope and the external environment load, and referring to the requirements of the use environment of micromechanical gyroscope, designs the reliability test flow, and analyzes the reliability test flow The test results provide a new design method of test flow for reliability test of MEMS gyroscope with full symmetrical structure, which is of great value for popularization and guidance.