bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of arch bridge collapse based on finite element technology
Authors: Niu Yu , Yang Qingshun 
Published: March 2020

Abstract
Even in today’s technologically advanced, engineering accidents are still unavoidable. How to numerically simulate the collapse process of bridges becomes a major problem, and the continuous development and maturity of finite element technology provides an effective way to solve this problem. This paper takes the Yilanao Bridge in Taiwan as the research object, and establishes multiple models based on the finite element analysis software MSC. MARC and MIDAS, and analyzes the causes of the damage. This paper has certain reference significance for the study of the failure form and failure process of arch bridges.
Strength properties and reinforcement mechanism of bio-enzyme stabilized marine soils
Authors: Li Jinzhu , Wang Wenjun , Huang Hongxiang 
Published: March 2020

Abstract
Bio-enzyme was used to stabilize the marine soils of Ningbo. Strength tests, XRD tests and SEM tests were used to analyze the strength and microstructure properties of bio-enzyme and cement stabilized soil. The results of strength tests show that the bio-enzyme not only has obvious reinforcing effect when added alone, but also can promote the solidification of cement. The results of XRD tests show that there is no new substance formation during the solidification process when only bio-enzyme added, which indicates that the process is a physical effect. The results of SEM tests show that the bio-enzyme can improve the pore arrangement, pore morphology and pore size of the soil, and reduce the directional fractal dimension, probability entropy, porosity fractal dimension and pore shape fractal dimension, which makes the orientation of the pores better, the order of the particles higher, the pore size more uniform, and the degree of particle agglomeration higher, therefore increasing the strength. In all the microstructure parameters, the fractal dimension of pore morphology has the greatest influence on the strength of stabilized soil, that is, promoting the aggregation of soil particles is the main role of bio-enzyme in improving the strength of stabilized soil.
Research on the framework of full-process condition monitoring and evaluation method for express logistics based on multi-information fusion and intelligent identification
Authors: Ma Luping , Zhang Yuan , Du Yanping , Huang Lei 
Published: March 2020

Abstract
This paper describes the background and significance of the whole process state monitoring of express logistics in the three aspects of environment, society and economy, then introduces the current status of the tracking and monitoring of logistics process at home and abroad, and proposes the method of full-process condition monitoring and evaluation method for express logistics based on multi-information fusion and intelligent identification, The content of the method mainly includes: collecting data based on various information collection methods such as sensors, extracting and identifying the characteristics of expressive behavior through the algorithm and quantitative evaluation of the whole process express logistics status.finally, Finally, the paper summarizes the whole system-based method of multi-information fusion and intelligent identification of the whole logistics process monitoring and evaluation, and explains the follow-up work direction and content.
Self-absorbed Ca doublet lines for stand-off quantitative analysis by laser induced breakdown spectroscopy
Authors: Zhao Na , Qian Jing , Cai Jiansi , Zhang Hongyan , Wang Menghan 
Published: March 2020

Abstract
Laser induced breakdown spectroscopy (LIBS) is one of the promising techniques for stand-off detection of element composition. However, it is somewhat limited by quantitative shortage. Absolute line intensity may be influenced by acquisition conditions, environmental variation, and sample surface conditions. Relative intensity may also fluctuate greatly. This study shows that the intensity ratio between Ca II doublet emission lines (393.37 nm and 396.85 nm) is stable, and changes with Ca concentration (or Ca atoms count within the laser spot). This is due to differences in self-absorption between the two transitions. A theoretical calibration shows a linear section for low species density and quadratic section for high species density. Experimental results confirm the linear section after density correction of CaO pellets. However, an equipment factor should be considered for numerical calibration in different laboratories. For Ca-containing samples, quantitative analysis could be based on the detected Ca spectrum. Ca is also shown to be suitable as an internal standard reference to determine other elemental concentration, such as Mg.
Research on Human-Computer Interaction Design of Office Chair Based on QFD Method
Authors: Wang Zhenyu , Chen Ming , Lyu Jianhua , Chen Siyuan , Chen Yuting 
Published: March 2020

Abstract
Based on quality function deployment (QFD) and emotional design theory, the psychological needs of users are explored, and the interactive design system of office chairs is developed centering on users, thus solving the problems of space efficiency, office mode and human-computer interaction. First of all, through the relationship between the emotional concept and “function-behavior-benefit” in QFD method, from the perspective of emotional experience, the man-machine relationship is analyzed, and the principles and methods of contemporary office chair comfortable and healthy experience design are summarized. Secondly, based on the product structure and human-computer interaction design, the internal demand of consumers is transformed into the actual demand of products, and the QFD house of quality model is output to obtain the best design scheme. Finally, through design demonstration, the integrated application of emotional design and QFD method is feasible and effective, which can form a mapping relationship between product benefits and user needs, thus realizing the man-machine interaction design of multi-adaptive office chairs.
Study of the types and characteristics of geological hazards in reefs of Nansha Waters, South China Sea
Authors: Guo Lei , Qian Jing , Lei Chengbin , Cai Yihuang , Zhao Hongjuan 
Published: March 2020

Abstract
Reports of the 19th National Congress of the Communist Party of China identifies that the construction of islands and reefs in South China Sea (SCS) has been actively promoted. It is of great practical significance to study the types and characteristics of geological hazards in Nansha Islands and reefs, and it is the precondition and guarantees to carry out the construction of islands and reefs. At present, the research on marine geological hazards in China focuses on oil and gas enrichment areas such as Bohai bay, southern Yellow Sea and Northern of South China Sea, and there is little research on southern of South China Sea, especially Nansha Reefs. On the basis of collecting and sorting out previous research achievements, combining with existing geological and geophysical data and drilling data, his paper focuses on analysing two single-channel seismic profiles N01 and N02 collected by “Shiyan 2” of South China Sea institute of Chinese academy of sciences in Nansha Islands and reefs in 2013, and studies the types and characteristics of geological hazards in this area. The study shows that the whole Nansha block belongs to areas with weak seismic activity, most of the faults in the island reef area are weak and micro-active, and the volcanic activity in the island reef area is weak, and the coral reef growth rate is fast, which can be suitable for all kinds of engineering construction projects.
Research and development of icon recognition system based on machine vision
Authors: Cao Ning 
Published: March 2020

Abstract
Machine vision represented by two-dimensional code and barcode is widely used, but both are not friendly enough for human eye recognition and cannot be used in human-machine collaborative work. Therefore, this paper proposes a machine vision-based icon recognition system that can quickly identify human-friendly icons. The system first converts the real-time image captured by the camera into binary image. Secondly, divide the binary image into 9*9 cells, get the binary information of each cell center point, match with the template information, and finally judge and draw the recognition conclusion. Experiments show that the method is fast and accurate in identifying icons, and the effect is good.
Study on Water Hammer Protection of Accumulator for High Pressure Water Descaling System
Authors: Meng ShengLi , Chen Xiao Bing , Yao Weiguo , Che Congbin 
Published: March 2020

Abstract
Use characteristic linear method to establish the general mathematical model of the protection calculation of accumulator from water hammer in high pressure water descaling system pipeline. Through the model, the paper calculated the change of transient water hammer pressure in the main pipe under 3 different conditions: with and without accumulator, different accumulator capacity and different accumulator installing positions. The calculation results show that the pressure fluctuation of the main pipe changes with the descaling procedure; the accumulator provides obvious protective effect on the water hammer of the high pressure water descaling system and the initial volume of the accumulator has an obvious influence on the water pressure changes while the installation positions on the main pipe is with little influence on the protection effect of the accumulator.
Simulation of fluid around parallel-column by LES
Authors: Cheng Lei , Zhang Zhenwei , Zhao Xinyu , Zhang Xiaoming 
Published: March 2020

Abstract
To figure out the distributions of the parallel-column’s field, this article used LES to study parallel-column. This article demonstrate the rule of how the parallel-column field changes with P/D (P: center spacing D: diameter), focused on the how the Bluff-body’s P/D affect to the speed field & pressure field. The simulation showed the field changed as the P/D ratio rise, when P/D ratio reach 0.2-0.6 the field show as Von Karman vortices, 0.8-1.0 show as parallel field, when it got large than 1.2 will be show as vortex side flow. The optimum working point is between 0.8-1.0, the air flow in this area’s subgrid Turbulent Viscosity is smaller the vortex strength of tail also weak.
Research and Application on the Power Transmission and Transformation Equipments’ Fault Diagnosis Method Based on Online Monitoring
Authors: Chen Zhaohui 
Published: March 2020

Abstract
How to ensure the safe and stable operation of power system is one of the key tasks that need to be solved urgently in power department at present, and the fault factors such as normal operation and condition maintenance of power transmission and transformation equipment determine the safety of power system. In order to solve the fault diagnosis method of transmission and transformation equipment, improving the efficiency of equipment condition maintenance and improving the ability of fault discrimination is one of the main solutions. In this paper, through the equipment state evaluation and fault early warning based on-line monitoring, a variety of inspection measures are fully considered through the model, so as to predict the equipment with hidden trouble and put forward the fault early warning.
Development of intelligent remote control walking fish robot
Authors: Wu Guoguo , Yang Guolai , Li Chunjiang , Luo Tianhong , Jiang Rongliang , Liao Jiameng , Yang Baojun , Zheng Denghua 
Published: March 2020

Abstract
The design is based on mobile phone platform, with communication technology, design a solution for wireless remote control fish robot. According to the cage mechanism, Arduino control technology and mobile phone APP development technology of bluetooth communication realize the real-time control of the direction of the robot and remote feeding function. The interaction of toy, human and nature not only provides a new idea for the design of remote control ship, but also provides a new direction for the development of remote control toys.
Bim-Based Artificial Engineering Integration Method for Building Engineering Database
Authors: Che Xiaoyang 
Published: March 2020

Abstract
In order to perfect the database system of building engineering and meet the demand of data processing and integration, a BIM - based artificial intelligence system integration research method of building engineering database was designed. The role of artificial intelligence integration method in building engineering database system was deeply analyzed, based on which the effectiveness of BIM based artificial intelligence integration method in building engineering database was further discussed. After experimental verification, the bim-based artificial intelligence integration method of building engineering database was more conducive to further improving the efficiency of architectural engineering, effectively reducing the design cycle of architectural engineering and realizing the optimization design of architectural engineering. And its integration efficiency was about 30% higher than the traditional integration method.
Application of Artificial Intelligence in Quality Test of Vibrating Fruit Harvesting Mechanical Operation
Authors: Yang Xiaozhou 
Published: March 2020

Abstract
Harvesting operations were an important part of the production of fruit. In order to improve the efficiency of harvesting fruit and reduce the cost of harvesting, in view of the small working space in the dwarf dense planting mode of China’s orchard, the artificial intelligence technology was applied to vibrating fruit harvesting mechanical operation, and the theoretical analysis of artificial intelligence technology application was analyzed; The equipment requirements of artificial intelligence in vibrating fruit harvesting machenical operation were studied. On this basis, the system application process of artificial intelligence in the harvesting machenical operation of fruit trees was deeply explored, and the work was carried out in the practice of mechanical operation, and the recovery rate was detected to be 90% to 95%. Tests had shown that the recovery rate was 36% higher than the traditional vibrating fruit harvesting technology.
Application of Multi-Channel Communication Technology in Wireless Sensor Networks
Authors: Guan Wei 
Published: March 2020

Abstract
This paper mainly introduces the application of multichannel communication technology in wireless sensor network. The corresponding solutions are proposed based on the analysis of the structure and characteristics of wireless sensor, and the multi-channel MAC protocol in wireless sensor network. In this paper, multi-channel communication technology in wireless sensor network (WSN) is studied, the existing problems and reasons are analysed, and some solutions to further promote the further development of the technology are put forward. With the wide application of WSN, the security of WSN has been paid more and more attention. In this paper, the existing time synchronization protocol, from the security point of view, and the fault tolerance design of the fits protocol. The protocol has an intrusion detection mechanism, which can detect the attack of malicious nodes in time synchronization. Aiming at the small deviation of slow attack and the problem of time synchronization error, information fusion is based on the quality principle, and according to the time synchronization information of different nodes, we make random weighted average correction for local time nodes. The simulation results show that the fits time synchronization protocol has good intrusion detection and fault tolerance capability.
Submarine Target Recognition Based on Gps Positioning System
Authors: Qiao Weihua , Shoujun LI 
Published: March 2020

Abstract
With the development of transportation and the rapid spread of travel tools, economic exchanges around the world have become more frequent. The Global Positioning System (GPS) is an all-weather, high-precision, wide-coverage electronic navigation device that plays an important role in identifying submarine targets. The key technology of GPS is the real-time accurate extraction of targets, and the essence of target extraction is image segmentation. In order to achieve the purpose of seabed target recognition, a simple and effective method is proposed. In this paper, image points of active target image features are calculated by image processing to achieve positioning of the target. The neural network is used to establish the coordinate correspondence of the target from the image space to the GPS positioning system space to locate the submarine space moving target. Based on the positioning principle of GPS technology, the navigation technology of submarine target recognition is studied. A multi-target detection experiment for submarine target location was carried out. The results show that the multi-target recognition and positioning system based on GPS positioning system combined with sonar image design, the target recognition accuracy rate is over 93%, which meets the technical requirements of the detection system. Improving the identification of submarine targets is important.
Research on GPS Timing Remote Synchronization Algorithm in High Altitude Meteorological Data Acquisition System
Authors: Qiu Min , Qiu Yang , Yang Yurong , Bai Yu 
Published: March 2020

Abstract
The various high altitude meteorological parameter influence each other, and test data of different locations need to be synchronized. In this paper, we propose a GPS timing remote synchronization algorithm for high altitude meteorological data acquisition system, which can make the meteorological data at different locations meet the requirements of synchronization. GPS module uses NEO-M8N chip of UBLOX to achieve GPS timing remote synchronization, which include hardware and software designs for the system. We use the designed system to measure high altitude meteorological data in two different locations, analyze experimental results and show the relationship between meteorological parameters. In the processing for experimental results, we employ Fletcher-Reeves algorithm based on artificial neural network to predict meteorological data, and analyze training errors of the algorithm. The proposed system can realize reception and processing of remote data synchronously, and predict the meteorological data for weather forecast.
Magnetostriction effects in silicone elastomers
Authors: Kelbysheva E S , Valiev H H , Ya Minaev A , Stepanov G V , Korovkin Yu V , Vlasov A N , Karnet Y N , Snegireva N S , Yu Bazin A 
Published: March 2020

Abstract
New silicone magnetoactive elastomers have been synthesized and studied. Significant magnetostrictive effects in the synthesized composites were visualized by microscopy. The obtained results can be the basis for the design of controlled dampers and promising magnetostrictive engines of a new generation with micro and nanoscale positioning accuracy and the ability to transmit significant force effects on the operated objects.
Characterization of flawing on feather surface of low pressure compressor blades from VT-3 titanium alloy
Authors: Kozyreva O E , Volgina N I , Belelyubskii B F 
Published: March 2020

Abstract
The article provides the results of the study of flawing on feather surface of low pressure compressor blades. These defects were identified during flaw-detective etching treatment, and were intentionally, with the help of mechanical and electrical influences. During the study, comparison of the microstructure of the feather surface of blades in the area of identified and specially caused defects was made in order to determine their nature and the cause of their formation.
Classification of viscoelastic models with integer and fractional order derivatives
Authors: Krusser A I , Shitikova M V 
Published: March 2020

Abstract
In the world literature there exists a wide variety of papers devoted to linear viscoelastic models. This work was initiated by the absence of a single generally accepted classification of viscoelastic models. We focused on the basic mechanical models, namely, the Kelvin-Voigt, Maxwell, standard linear solid and Jeffreys models. All other models are different combinations of basic elements connected in series or in parallel. The classification also includes viscoelastic models with fractional derivatives and fractional operators.
Auxetics materials: classification, mechanical properties and applications
Authors: Mazaev A V , Ajeneza O , Shitikova M V 
Published: March 2020

AbstractIn contrast to classical materials, auxetic materials (from the Greek word αὐξητικόσ / auxetikos) possess negative Poisson’s ratios, thereby exhibit reverse deformation mechanism. Under a tensile force applied in the longitudinal direction, auxetics expand in the perpendicular transverse direction. Consequently, auxetic materials possess various useful properties for potential applications. This review contains the classification of auxetic materials according to different criteria: the type of structure, cell geometry and scale, mechanical characteristics, methods of their production, and engineering applications. The aim of this work is to sum up structural information on auxetics.
Spring-in experimental evaluation of L-shaped pultruded profiles
Authors: Vedernikov A N , Safonov A A , Gusev S A , Carlone P , Tucci F , Akhatov I S 
Published: March 2020

Abstract
Currently pultruded profiles are widely applied as structural elements in different areas due to their high strength, low weight, improved corrosion and fatigue resistance properties. Nevertheless, production of pultruded elements presents challenging aspects related to the peculiarities of pultrusion manufacturing process. Indeed, produced profiles exhibit shape deformations immediately after curing such as spring-in and warpage. These manufacturing induced shape distortions evidence time evolution behavior. This paper presents a seven months long experimental investigation of time-dependent distortion evolution of pultruded L-shaped profiles.
On the issue of resistance of dispersed-filled composites, the development of cracks of mixed type
Authors: Burukin I V , Pirozhkov V A , Rybakova M R , Skvortsov A A 
Published: March 2020

Abstract
Currently, various non-metallic materials are widely used in industry, including composite ones, which have a number of positive properties. The practice of operating products from these materials allows us to conclude that many of these are characterized by a brittle nature of destruction. Moreover, numerous experimental studies have established that the crack resistance of brittle materials is directly dependent on the type of crack opening. In many studies devoted to the study of strength issues, the essential role played by the spherical component of the stress tensor in the development of the process of brittle fracture of the material plays a significant role.
The simulation of crack growth in rolling stock running wheel disk
Authors: Chunin V V , Knyazev D A , Timakov M V 
Published: March 2020

Abstract
The article reviews scientific and technical literature in the field of the survivability of railway wheels. The computer simulation of the flat crack growth at different temperatures is performed with the estimation of the crack propagation rate and survivability parameters. In conclusion, the estimation is provided to refine the calculation model, followed by the recalculation of the obtained results.
Reliability of strain gauge measurements to clarify the strength of structures at high temperatures
Authors: Klymov M V , Maslov S V , Poguliaiko A N 
Published: March 2020

Abstract
The paper considers the problem of ensuring the reliability of experimental data obtained by tensometric studies of existing power plants. A technique that allows taking into account the change in the metrological characteristics of high-temperature strain gauges has been proposed. The design of the installation for determining the sensitivity of strain gages at temperatures up to 700°C has been considered.