bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamic Analysis of Digital Twin System Based on Five-Dimensional Model
Authors: Sun Lei , Pei Aigen , Qi Xuan , Cao Sheng , Yang Ruibo , Liu Xiaoke 
Published: April 2020

Abstract
The practical application level of digital twinning technology has always been far from people’s expectations. In order to make the digital twinning technology develop better, it is urgent to explore the internal causes of this kind of drop. Based on the theory of digital twinning five-dimensional model, combined with the actual situation of software development, dynamically analyze the working state of digital twin system, observe and discover the working conditions of various structural elements in the work of digital twin system, and propose the data of twins in digital twin system. The existence method, clear the concept of multiple virtual entities in the digital twin system, propose the principle that the service elements must be combined with the physical/virtual entities, summarize the organizational structure and operation rules of the digital twin system, and summarize the principles of a series of digital twin systems. The concept points out how to reduce manual operations to improve the operation of digital twin systems. The conclusions based on the five-dimensional model of the digital twin system are universal and can provide reference for the establishment and management of various types of digital twin systems.
The application of ultramicroscope with high precision in light and small laser communication system for micro-nano satellite
Authors: Chi Tie , Li Xiaoming , Meng Lixin , Zhang Lizhong 
Published: April 2020

Abstract
With the rapid development of space laser communication technology, it is possible to realize mass data transmission between satellites in low orbit. Micro-nano satellite is the first choice of low orbit communication satellite because of its lightweight, small size and low cost. Laser scanning technology is a kind of technology that can accurately control the direction of laser beam. It has been widely used in the field of space laser communication. In this paper, after analyzing the technical requirements of the scanning mirror with APT system for microsatellite, a kind of miniature scanning mirror is selected to realize the accurate pointing of the beam.
Research on embedded file management system based on Forth virtual machine
Authors: Wan Chunmei , Dai Hongbing 
Published: April 2020

Abstract
In view of the lack of file management mechanism in the current embedded Forth operating system, a file management system is proposed in this paper. Embedded Forth system in astronomy, image processing, artificial intelligence has a wide range of applications, such as is the current popular embedded Forth system cannot be updated online, on-line modification and online programming problem, this subject adopts Forth, delayed word virtual machine technology, build operating system based on embedded Forth file management system of the SD card, to write a Forth system with SD card drive function, Forth buffer management, dynamic load, the editor’s build, complete Forth communication between the system and the SD card, load the related data from SD card, Make changes in the Forth system and save them to an SD card. To build a small file management system in the embedded Forth system and realize online editing, loading and updating in the embedded system.
Establishment and Simulating Verification for Hyperbolic Tangent Model of Magneto-rheological Damper
Authors: Li Gang , Lin Hao , Ouyang Na , Hu Guoliang , Xu Rongxia , Gu Ruiheng 
Published: April 2020

Abstract
Firstly, the parameters of hyperbolic tangent model with magneto-rheological (MR) damper are identified via particle swarm optimization algorithm based on the mechanical properties test. Then, the functional relationship between the identified parameters and input current is fitted by curve fitting toolbox. Ultimately, Simulink toolbox is utilized to design and establish the hyperbolic tangent simulation model with MR damper, meanwhile, the different input currents and sinusoidal signals with other amplitudes and frequencies are selected for simulation and comparative analysis. The results show that parameter identification accuracy of particle swarm optimization algorithm is high. The simulation and experiment data under combination conditions with different input currents and other sinusoidal signals are in good agreement, which verifies the generality and accuracy of the parameter identification results.
Multi-functional indoor elderly standing seat
Authors: Su Lei , Peng Lijun , Wang Yuheng , Xiong Xinhong 
Published: April 2020

Abstract
As China’s running enters an aging society, the number of people over the age of 60 is growing rapidly, and the number of “empty-nesters” living alone and widowed is growing at an unprecedented rate. The elderly living alone are the vulnerable groups of the elderly, their own control of the environment and the ability to cope with sudden situations, and no one to take care of, it is easy to accident. Therefore, to create a peaceful, peaceful, happy old age, so that they live in peace and security, happy to spend every day, is a major task we have to take on. Based on the above background, the team members studied and designed a new type of power-assisting device- multi-functional indoor power-assisted chair. The device has the characteristics of light body, clever structure and low cost, including two function modules, auxiliary sitting and auxiliary walking. The coordination and cooperation between the various agencies effectively prevents the accident when the elderly are alone at home, which has high practical value and promotion value.
Application of SSD framework model in detection of logs end
Authors: Tang Hao , Wang Kejian , Gu Jiancai , Li Xiaoye , Jian Wenhao 
Published: April 2020

Abstract
External factors in the natural environment interfere with the detection of logs end. A method for detecting the logsend using an SSD model in a natural scene is proposed. The use of default frame in SSD can realize the extraction and utilization of target features with different scales and improve the detection accuracy. By manually marking the foreground area of the logs end, the interference of the features of the background area is reduced, and the convolution learning of the feature of the target area is enhanced. The performance evaluation and comparison test of the method showed that the accuracy rate was 94.87% and the recall rate was 91.34%. Compared with the traditional method, it reduces the occlusion effect caused by light and shooting angle, and improves the detection accuracy.
A high precision TDC design based on FPGA+ARM
Authors: Zhang MengDi , Wang HuaChuang , Liu Bo 
Published: April 2020

Abstract
In this paper, a high precision time digital converter(TDC) is designed based on FPGA and ARM, It includes coarse module, delay chain module, look-up-table module, ringosc moduleand spi module in the FPGA chip. The ARM chip is used for reading the timestamp and printing through the serial port. The key technology of this design is using the CARRY4 block of Xilinx Aritex-7 series to construct a delay chain for finecount. The system clock is used as the coarse count. The timestamp is obtained by the combination of fine time and coarse time.In addition, the precison of TDC is improved by code density test. The experiment result shows that precision of TDC is 43.2ps.
Research on Anti-Jamming for UAV Airborne Jamming Method Based on Relay Optimization Strategy
Authors: Fang Fang , Liu Xuewen , Li Yonggui , Shen Qing 
Published: April 2020

Abstract
Aiming at the new threat of Unmanned Aerial Vehicle (UAV) airborne jamming faced by wireless mobile communication networks, a communication network anti-jamming technology method based on relay optimization selection strategy is proposed. In order to achieve the maximum transmission rate of the selected relay node, a system model based on multi-arm bandit (MAB) is established. It is proved by simulation that the method of selecting the best relay node by Upper Confidence Bound (UCB) algorithm is feasible. It can avoid the nodes that are most affected by jamming and improve the anti-jamming ability of the communication system.
The Measurement of Acoustoelastic Constant to evaluate Stress by UsingUltrasonic Waves
Authors: Zhu Yuhong , Zhao Hong , Song Cheng , Hu Bin 
Published: April 2020

Abstract
This experimental study aims to investigate the capability of the ultrasonic method by using critically refracted longitudinal (LCR) wave for measuring welding stress in elastic limits.Ultrasonic technique is based on the linear relation between the ultrasonic wave velocity and the stress, known as the acoustoelastic effect.To determine acoustoelasticconstants, different amounts of stress were applied to the specimens by using uniaxial tensiletesting machine. The outcome of the study showed a linear relation between time-of-flight (TOF) measured and the tensile stress in the samplesand providedthe acoustoelasticconstants of Q345. This paper also analyzed the measurement influence factors including the thickness of couplant, temperature and residual stress.
Modeling and Simulation of Top-level Design Based on MBSE
Authors: Dandan Wang , Hao Liang , JianWen Cui 
Published: April 2020

Abstract
To solve the problem that it is difficult to evaluate and optimize the top-level system design scheme of complex products, a modeling and simulation method of top-level design based on MBSE is proposed. Through the use of SysML to describe the requirements of the system and the functional decomposition and interface of the subsystem, the system model is established; then, the mapping relationship between the SysML model and the Petri net is established, and the SysML model is transformed into the Petri net model. The model is verified by the Petri net simulation tool to evaluate the rationality of the requirements and the completeness of the overall indicators. The simulation results show that100 optimization design variables and 10 optimization constraints can be achieved to meet the requirements.
Measuring Method and Device for Mechanical Characteristics of AC Contactors
Authors: Li Bin , Wang Liang , Song Jian , Su Kun , Liu Yang , Liu Shuxin 
Published: April 2020

Abstract
AC contactors are widely used in various low voltage electrical control circuits. The operation status of AC contactor will affect the safety and reliability of power system operation, so it is important to accurately evaluate the operation status of AC contactor. An outstanding feature of electrical intelligence is that it can be monitored on-line, which is of great significance for evaluating the performance degradation of AC contactors. Accurate acquisition of physical quantities such as speed and acceleration of AC contactor is difficult at present. Traditional method installs vibration sensor in linear motion of AC contactor. The vibration of contact system of AC contactor will inevitably produce large interference signal, which is not easy to filter and affects the acquisition and processing of useful signal. Therefore, it is necessary to have stable devices and more suitable algorithms to measure and calculate these physical quantities.
Saliency Prediction Based On Lightweight Attention Mechanism
Authors: Wang Yu , Zhu Ming 
Published: April 2020

Abstract
Saliency prediction refers to an algorithm that extracts salient regions from natural scenes. In the field of deep learning, receptive field limits the accuracy of pixel classification and thus affects the accuracy of saliency prediction. This study proposes a new saliency prediction method that uses the improved feature pyramid attention (FPA) to gain multi-scale context information to solve the above-mentioned problems. FPA’s number of parameters and cost of calculation are also decreased. Experimental results show that this method can obtain more accurate results than the existing saliency prediction methods without increasing the calculation amount.
Construction of Dynamic Weights in State Degradation of AC Contactor
Authors: Li Jin , Tian Ersheng , Li Yanfeng , Liu Shuxin , Hou Lei , Zhu Guodong , Su Yang 
Published: April 2020

Abstract
AC contactor needs to break the main circuit and control circuit frequently in the process of operation. With the accumulation of electrical stress and other losses, AC contactor will fail, causing accidents and huge losses. The whole life model of AC contactor is designed to objectively reflect the state information during the operation of AC contactor and predict the end time of the electric life of the contactor, so as to ensure the safe and reliable operation of the power system. The whole life test of AC contactor was carried out under the test condition of AC-4, and the parameters of the whole life model were obtained from the test data. In order to accurately reflect the influence degree of each characteristic parameter on the life during the whole degradation process, the general constant weight evaluation model was optimized. The results show that the evaluation model with dynamic weight is better than that with constant weight.
A Design of Online Tobacco Moisture Monitoring System
Authors: Shi Xiang , Jin Yucheng , Zang Chunhua , Wang Wenlong 
Published: April 2020

Abstract
This paper introduces a moisture monitor based on NB-IoT which can be used to remotely measure the moisture of tobacco packet that will be stored for a long time. The sensor section of the device uses a capacitive method to complete capacitance to voltage conversion and the monitor uses STM32 to control the sensor work. The measured data is transmitted to the web server through NB-IoT, and further data analysis and processing can be performed on the server side. The moisture monitor designed by us in this paper has achieved high precision, low power consumption and low packet loss rate after being used in the tobacco warehouse. The device can work for two years and the status of tobacco moisture was monitored steadily.
Incorporating Morphological Compostions with Transformer to Improve BERT
Authors: Song Yuncheng , Song Shuaifei , Ge Juncheng , Zhang Menghan , Yang Wei 
Published: April 2020

AbstractBERT model achieves huge performance gains by modeling words and their subwords as input units. However, it still neglects the semantic information of morpheme which has been verified in many previous works. In this paper, we propose Transformer Morpheme Model (TMM), which is based on BERT and explores the effect of morpheme. Since the process of previous works about morpheme are context-independent.TMM model adopts Transformer to process morpheme information on the input layer to overcome this problem. Experiments on MRPC task are conducted to validate the feasibility of our model. TMM model has achieved about 1% gains over BERT model on MRPC task. The results demonstrate the superiority of our method and the effectiveness of morpheme information in the BERT model.
Merrifield-Simmons index of Cartesian product of two graphs
Authors: Liu Man , Tian Shuang-liang , Yang Qing 
Published: April 2020

Abstract
Merrifield-Simmons index of a graph G shorted word M-S index, noted by σ(G), which is defined as the number of the independent sets of the graph G. In this paper, a special graph is defined and considered the Merrifield-Simmons index. The main concer in this work is devoted to calculating the number of independent sets with respect to the Cartesian product of Sm
and Pn
, where Sm
is a star of order m and Pn
is a path of order n, respectively.
Research on Real Estate Transaction Platform Based on Blockchain Technology
Authors: Yang Liwen , Wang Jiehua 
Published: April 2020

Abstract
This paper analyzes the current status of real estate transactions in China and puts forward some shortcomings. In response to these shortcomings, a real estate transaction platform based on blockchain technology is proposed. This platform uses the Hyperledger Fabric platform to effectively connect purchasers, sellers, financial institutions and government departments. Firstly, the whole transaction process of the platform is proposed. Then, the design framework of the system is proposed and the implementable scheme is given. At last, this work summarizes some points of the program, and points out the shortcomings and difficulties in the future work.
Design of 220GHz harmonic mixer
Authors: Yu GuoSheng , He QingGuo , Zhou Biao 
Published: April 2020

Abstract
220GHz is the frequency of atmospheric window. The mixer working in this frequency band has a very important application in terahertz communication detection and other fields. This paper introduces a mixer design based on planar Schottky barrier diode. Based on the reverse parallel diode fabricated by the process platform of the 13th Research Institute of China Electronics Technology Group Corporation. The schematic layout of the mixer is simulated and optimized by the joint design of ADS and HFSS and other electromagnetic simulation software. Finally, The frequency conversion loss is less than 9 in the range of 200 to 240 RF frequencies.
Research on Design Method of Human-in-the-loop Civil Aircraft Simulation System
Authors: Jilei Fu , Zhanwen Qu , Yi Lu , Tong Zhang , Dan Huang , Shan Fu , Xinai Zhang 
Published: April 2020

Abstract
In the process of aircraft development, in the conceptual design and functional design phase before semi-physical simulation verification, it is often necessary to rely on the all-digital simulation system to design aircraft components and systems and verify that all requirements are satisfied. To meet the civil aircraft design requirements under unconventional conditions and build a holistic and comprehensive functional network, this paper demonstrates a forward design process of the scene-based civil aircraft system functional requirements identification based on the human-in-the-loop simulation system. The method proposed in this research promotes the construction of a requirement-function evidence chain. It provides a theoretical basis and method suggestions for the transformation from result control to process guarantee to support the development of civil aircraft products.
Research on image segmentation of inner cylinder wall with annular weld based on deep learning
Authors: Jun Fei Xia , Qiao Sheng Feng , Xiang Dong 
Published: April 2020

Abstract
Based on the characteristics of autonomous learning with deep learning and high recognition rate, an image segmentation study based on Faster R-CNN for the inner wall annular weld is proposed. The method extracts pixels containing annular weld feature information by using an RPN network to improve target detection speed. Then, the convolutional layer output detection model is shared by the RPN network and the Fast R-CNN network to realize accurate detection of the annular weld in the video image. The research results show that the proposed method can accurately detect the circumferential weld bead and segment the image under the condition of poor video image quality, and has the advantages of strong anti-interference ability and accurate identification.
Physicochemical properties, antimicrobial and antioxidant activity of ganoderma transparent soap
Authors: Hayati S N , Rosyida V T , Darsih C , Nisa K , Indrianingsih A W , Apriyana W , Ratih D 
Published: April 2020

Abstract

Ganoderma lucidum has been known as a cosmetic source. It contains bioactive ingredients such as triterpenoids and polysaccharides. The present study was to formulate transparent soap enriched with Ganoderma (Ganoderma lucidum) extract and investigate its antibacterial and antioxidant activity. Formulation of Ganoderma transparent soaps was made by hot process method. The results showed that Ganoderma transparent soaps have moisture content 21.8%, pH 9.22, total fatty matter 41.66%, free fatty acid 1.08% and chloride acid 5.57%. Antibacterial assay by agar well diffusion method showed that Ganoderma transparent soaps were more active against the S. aureus than the Gram-negative bacteria and even C. albicans. The antioxidant activity assay using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical showed that the IC50 of transparent soap was 1.53 mg/mL.
Utopia or reality: architectural and urban typologies in the future of cities
Authors: Adonina A V 
Published: April 2020

Abstract
The article discusses modern conceptual architectural and urban planning projects. Taking the example of programs for international architectural and urban planning competitions, new architectural and urban planning typological units are identified. For example, urban meal mine, digital colosseum, parking tower, functional bridge, as well as habitat concepts, could be the next step in the development of cities. The projects noted by the competitive jury are analyzed on the subject of which aspects proposed by the participants are utopias, and which can become reality. As a result of the study, a forecast is made of the application of the identified design trends in relation to Russia, as well as recommendations are given on the introduction of such conceptual contests in the context of regional problems.
Application of metareconstruction method as a means of marking traces of lost historical buildings
Authors: Artemyeva T G , Balzannikova E M 
Published: April 2020

Abstract
The article analyzes the well-known methods of conservation of architectural heritage. The international and Russian regulatory documents on the conservation of buildings are considered. The authors determine the approaches to development of ways to recreate lost historical monuments or their parts. A new method for preserving historical architectural objects is proposed. The method is based on the principle of repeated reproduction of the image of the building by marking the general contours of the lost shape with the restoration of the metaphysical properties of the object. The term “metareconstruction” is proposed to denote a new method for preserving historical objects within the existing urban environment. The method can be implemented for saving environmental objects. The main characteristic features of the method and its difference from other known methods are listed.
‘Smart city’ system as an asset of cultural landscapes development
Authors: Blagovidova N G , Iudina N V 
Published: April 2020

Abstract
The article touches upon the idea of ‘smart city’ and ways of how it could be applied to advancing contemporary urban environment. Highlighting variety of definitions this popular term demonstrates there is posed a problem of apprehension both in theory and architectural practice. Authors place particular importance on social aspects of the method to be improved to make it adaptable to integrate with cultural heritage. Having referred to successful examples of heritage technological improvement authors claim ‘smart city’ to possess a level of ‘transparency’ high enough to create the superstructure of urban history basis, which is particularly significant for small towns and settlements of Russia. Finally ‘ smart technologies’ pretend to be an efficient strategy in Russian dispersal system for consistency enhancement.