bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Review of VSLAM Technology Applied in Augmented Reality
Authors: Tang Baihui , Cao Sanxing 
Published: April 2020

Abstract
With the development of the Internet, new technologies such as big data, artificial intelligence, virtual reality, block chains and quantum communications are emerging regularly and progressing. Augmented reality, as one of the important frontier directions of the new generation of information science and technology, integrates multi-media, sensors, new display technology, the Internet and artificial intelligence, and is gradually becoming a new focus of innovative applications in various industries. This paper details the development of VSLAM technology over recent years, and its application in augmented reality. We describe VSLAM’s development status, the classical schemes, and the specific system architecture of each scheme. The schemes are distinguished by their respective approaches to the four basic algorithmic frameworks: visual odometry, optimization, loop closing and mapping. We summarize current developments and existing problems and also consider the prospects.
Identification of Influence Factors on Accuracy Control of Non-Destructive Testing for Embedded Depth of Highway Guardrail Column
Authors: Hui Bing , Li Yubao , Xu Yongli , Ran Deqin , Shang Yong , Guo Qinghui 
Published: April 2020

Abstract
Combined with the project example of column buried depth nondestructive testing, the influence factors of signal-to-noise ratio of column buried depth nondestructive testing are analyzed. At the same time, the control measures to improve the accuracy are put forward according to the influencing factors.
Study on the Effect of Parallel Pipe Jacking Spacing on Surface Subsidence Deformation in the Pre-Construction Method of Tube Curtain
Authors: Zhang Jie , Zhao Xinyue , Li Yue , Zhang Junjie , Ren Guohui 
Published: April 2020

Abstract
In view of the feasibility of the pre-construction method of the tube screen, the paper makes a comprehensive and in-depth study on the law of the ground subsidence and deformation by means of theoretical analysis, numerical simulation and engineering test. The mechanism of parallel pipe jacking distance on surface settlement and the settlement calculation formula of parallel pipe jacking are studied. By means of numerical simulation, the law of surface subsidence with different jacking intervals is analyzed, and the accuracy of simulation is verified by combining with the monitoring of surface subsidence in actual engineering. The main conclusions are as follows: (1) By studying the subsidence mechanism of parallel pipe jacking distance to the surface, the necessity of controlling the surface subsidence by controlling the pipe jacking distance is expounded; (2) By comparing and analyzing the numerical simulation results of different pipe jacking distances, the vertical displacement values of the ground under different working conditions were obtained; (3) By comparing the engineering monitoring data with the numerical simulation results, it is proved that it is feasible to control the surface settlement by adjusting the pipe jacking distance.
Analysis on the Optimization of Agricultural Products Logistics in Huairen City
Authors: Li Dandan , Hou Hanping , Yang Jianliang , Yao Tianhui , Zhang Kexin , Liu Xinlu , Ren Hongzhi , Wang Wenjuan , Wang Liting 
Published: April 2020

Abstract
The essence of agricultural products logistics is the entity flow and information transfer from producer to consumer, which not only meets the needs of customers, but also realizes the value of agricultural products. Huairen city has a huge demand for the modernization of agricultural products logistics because of its natural location advantage and the active guidance of national policies. Although the city has made progress in the construction of transportation facilities and logistics industry, there are still problems such as backward level of cold chain logistics, low level of standardization and informatization, and shortage of talents. Therefore, based on the theory and practice, this paper analyzes the current situation, explores the future development direction of Huairen city’s agricultural products logistics, so as to accelerate the establishment of a modern agricultural products circulation system, promote the rationalization and adjustment of the agricultural structure.
The Evaluation of Logistics Performance of Harbor-Front Station Based on DEA
Authors: Zhang Kexin , Hou Hanping , Yang Jianliang , Yan Xinxin , Ting Jiangmeng , Yu Mingli , Yang Xiqing , wang Yue , Zou Jingyan 
Published: April 2020

Abstract
The evaluation of logistics performance of harbor-front station is conducive to the realization of efficient and coordinated logistics operations at harbor-front station, thereby achieving seamless connection between railways and ports, accelerating the turnover of sea-rail combined transport containers, thereby improving the logistics efficiency of sea-rail combined transport. This paper points out the role and responsibility of harbor-front station in sea-rail combined transportation. It uses C2R model of data envelopment (DEA) analysis method, in consideration of input and output indexes determined on the basis of the logistics evaluation index, then establishes horizontal logistics performance evaluation system to carry out the logistics performance evaluation. According to the results, this paper puts forward specific and constructive measures for the logistics operation and management of the harbor-front station.
Planter Pressure Information Acquisition System Based on STM32
Authors: Liang Xiaoyu , Zhao Jingbo , Wu Youyu 
Published: April 2020

Abstract
This paper introduces a plantar pressure detection and analysis system based on flexible membrane pressure sensor. The system collects and analyzes the data through the wireless Bluetooth module, and transmits the data and results to the upper computer.The performance of the system was tested and analyzed through the upper computer platform written in C ++.The results showed no significant jumps and mutations.
Prediction of Horizontal Displacement of Foundation Pit Based on NAR Dynamic Neural Network
Authors: Sun Zongjun , Li Kai , Li Zhongyi 
Published: April 2020

AbstractAbsrtact. NAR dynamic neural network has the function of feedback and memory, which can be effectively used in time series data modeling. Taking the actual horizontal displacement of a foundation pit in Qingdao as the experimental data, the time series prediction model of the horizontal displacement of the foundation pit is established by NAR dynamic neural network. The model is applied to predict the horizontal displacement of foundation pit, and compared with grey prediction, support vector machine and BP neural network. The results show that the prediction accuracy of NAR dynamic neural network model is high. It has strong stability and can be effectively applied to the prediction of foundation pit displacement.
Road Crack Detection Using Deep Neural Network with Receptive Field Block
Authors: Yang Jing , Fu Qin , Nie Mingxin 
Published: April 2020

Abstract
Cracks are common pavement diseases that affect pavement performance. To maintain the road in good condition, localizing and fixing the cracks is a vital responsibility for transportation maintenance department. However, traditional manual detection methods are considerably tedious and require domain expertise. Therefore, the research on automatic detection and identification of pavement crack is of great significance for ensuring traffic safety and pavement maintenance decisions. In this paper, we propose an automatic pavement crack detection network based on the Single Shot MultiBox Detector(SSD) deep learning framework, and introduce the receptive field module to enhance the feature extraction capability of the network, which ensures real-time crack detection and also improves the performance of accuracy in pavement crack detection.
Accurate Calculation Method for Mechanical Specific Energy of Horizontal Well
Authors: Wang Shuangshuang , Li Qian 
Published: April 2020

Abstract
The existing drilling efficiency-monitoring model based on the theory of mechanical specific energy is only applicable to vertical wells. When it is used to monitor the drilling efficiency of horizontal wells, the impact of high friction in horizontal wells is not considered, so the monitored specific energy of the machine is not real Specific energy of horizontal wells. Based on the previous research results, this dissertation uses the micro-element method to segment the drill string into micro-elements, and considers the influence of the friction torque of the horizontal well. For the existing horizontal wells, rotary drilling, sliding drilling and the characteristics of compound drilling have derived the mechanical specific energy calculation models of horizontal wells based on these three different drilling conditions for real-time monitoring of drilling efficiency of horizontal wells.
An Improved Evaluation of Comprehensive for Mine Fire Risk
Authors: Wang Linlin , Tong Ruigang 
Published: April 2020

Abstract
Because of the uncertainty of the influencing factors of coal mine fire in China, it will lead to the uncertainty of the evaluation results in the comprehensive evaluation of coal mine fire risk. Based on this, the goaf management, ventilation conditions, coal seam geological occurrence, and exploitation technology are used as first level evaluation indexes, and the fuzzy comprehensive evaluation method of fusion Dempster-Shafer evidence theory (D-S) is used to establish a comprehensive evaluation system for coal mine fire risk. The fire risk of Qiuji Coal Mine was comprehensively evaluated. The example shows that the fuzzy comprehensive evaluation method based on D-S can consider the uncertainty of influence factors more accurately and improve the accuracy and reliability of the comprehensive evaluation of coal mine fire risk.
Evaluation of the Compactness of Benefit Coupling of Farmers’ Cooperatives in Poor Areas: Based on the Date in Qinba and Wumeng Areas in Sichuan, China
Authors: Fu Xinhong , Du Zhijing , Zhang Xiyu , Chen Xue , Li Jianqiang 
Published: April 2020

Abstract
As a new type of agricultural management, farmers’ cooperatives play a critical role in the development of rural industries and the promotion of farmers’ poverty alleviation. However, in recent years, the problem of non-standardization and “empty shelling” of farmers’ cooperatives has seriously restricted the common development of their interests with members. Based on the field research of farmers’ cooperatives in the poverty-stricken areas of Qinba and Wumeng in Sichuan, this paper estimates the close relationship of the interests of farmers’ cooperatives in poor areas in Sichuan and summarizes the problems of farmers’ cooperatives in poor areas. The empirical results show that the poverty alleviation funds invested in the cooperatives have a positive effect on the compactness of benefit coupling, that the cooperatives are more closely related to the degree of closeness, and the sales linkage and rebate linkage are mainly semi-closed. The degree of frequency of the looseness of the equity linkage is high, and the tightness of service is mainly loose. Therefore, it is suggested that cooperatives should integrate resources, quantify equity, and clarify property rights to strengthen the close connection with the interests of members, and drive farmers to lift poverty and increase income.
Inverse Kinematics Analysis of Hybrid-Driven Special Five-Bar Mechanism for Shield Machine
Authors: Nie Jianjun , Wu Xiaowei , Yan Hongzhen 
Published: April 2020

Abstract
To simplify the inverse kinematics model of special five-bar mechanism based on Assur group, a inverse kinematics model is proposed by using vector analysis method and Euler’s formula, which is expressed by all explicit equations and establishes a direct relation between the output motion and the input motion. A numerical example and a computer simulation were conducted to verify the mathematical model. Results show that the motion law of control bar l4 obtained directly from the mathematical model is consistent with the result from ADAMS simulation, and the mathematical model of the special five-bar mechanism is correct and can be used to analyze the motion law of the drive bar and the control bar directly according to the motion parameters of the output point.
Characteristics of Tunnel Water Inrush and Progress in Grouting Materials in Mira Mountain Tunnel
Authors: Chen Wei , He Zhihao , Zhang Hao , Huang Teng , Peng Wenbo 
Published: April 2020

Abstract
Mira mountain tunnel is located in high altitude and cold area. Due to the influence of fragile ecological environment such as thin air and complex geological conditions, the tunnel would be liable to cause geological hazards. This paper will analyze the characteristics and causes of geological disasters in Mira mountain tunnel, combined with the research progress of grouting water stop material for tuff tunnel in high altitude and high cold area, so as to further guide the actual grouting construction and reduce the risk of geological disasters.
The Application of Principal Component Analysis in Stability Evaluation of Foundation Pit
Authors: Xia Weiyan , Wang Wei , Yuan Jiaqi 
Published: April 2020

Abstract
The foundation pit stability is the key and difficult point in foundation pit engineering research. The stability and safety of the foundation pit should be ensured not only by its excavation, but also by the surrounding buildings.Because the stability of foundation pit is decided by many complicated factors, it has a certain randomness.This paper adopts the principal component analysis method combined with engineering examples to calculate and analyze the six influencing factors that affect the stability of foundation pit: land subsidence, groundwater level, pile top settlement, horizontal displacement of pile top, reinforced concrete brace and inclination.The results show that inclination and pile top displacement have the most important influence on the stability of foundation pit. According to this study, the principal component analysis method has higher accuracy in the stability evaluation of foundation pit and has certain reference value, which can provide theoretical basis for the stability evaluation of foundation pit in related projects.
Research on Extraction Method of River Water from MODIS Image of Mountainous Areas in Western Sichuan and Optimized by DEM Data
Authors: Li Bo , Wang Meikai , Tang Jun 
Published: April 2020

Abstract
This paper has studied the extraction method of river water in the mountainous area of western Sichuan. We combine the two advantages of higher time resolution of MODIS and digital simulation of DEM surface terrain. This method can remove the shadow of the river and refine the effect of water. We have the advantage of applying MODIS to river monitoring. However, due to the narrow river channel in the western Sichuan Mountains, the region has mountain shadows and mixed snow cover, which makes the river edge areas blurred. We use existing methods to extract water bodies and the real situation is different. In order to apply the advantages of MODIS data to the monitoring of Mountain Rivers in this experiment, we selected the area flowing through the upper reaches of Minjiang River as a typical research area. After sampling and analyzing the typical features in the MODIS data for multiple days, this experiment The NDVI method was improved, and then it was combined with the MODIS band 1 data to obtain the mountain water body enhancement index (MEWI). In the end, this experiment realized the fuzzy treatment of mountain gullies in the image and highlighted the water body. Based on the previous work, we removed the blurred shadows of the edges of the MEWI water body by extracting regions with lower DEM slopes. The results show that after removing the channel shadow based on DEM, the channel water body is refined.
Research on Soil Shear Strength Device Based on Shear Wave Velocity
Authors: Wu Xin , Li Qing 
Published: April 2020

Abstract
The shear strength of soil refers to the ultimate resistance of the shear stress generated by the external load of the soil. The strength problem is one of the most important basic contents of soil mechanics, and shear failure is an important feature of strength damage. At present, the monitoring methods of the soil shear strength device, such as indoor direct shear test, triaxle compression test, large-scale direct shear test on site, and on-site cross shear test, cannot realize real-time measurement in situ in the long-term field. In this paper, a device for measuring the shear strength of soil based on shear wave velocity is proposed, and the shear strength of the soil in situ can be obtained in real time.
A Modified Sequential Method for Solving the Full Composition Model in Numerical Reservoir Simulation
Authors: Hu Xiaodong , Wang Min , Shi Anfeng , Liu Zhifeng , Wang Xiaohong 
Published: April 2020

Abstract
A modified sequential method (MSEQ) is proposed in this article to solve the full composition model in numerical reservoir simulation. During the iterative process, in order to solve the composition equations efficiently, the pressure field is treated as fixed temporarily, then the topological sorting algorithm is employed to update the saturation and mole friction field. Through the topological sorting for the grids from upstream to downstream, the full field coupled composition equations can be decoupled and solved with high efficiency as same as the explicit difference scheme. Numerical tests are performed and the high performance of the proposed MSEQ is illustrated. It can predict the simulation results with the same accuracy, and its computational speed is more than 2 times faster than the fully implicit method (FI) and the traditional sequential method (TSEQ).
A Systematic Review and Meta-analysis of Robotic Gripper
Authors: Long Zhang , Jiang Qian , Shuai Tao , Wen Feijuan , Liang Chunping 
Published: April 2020

Abstract
With the rapid development of robotics, robots gradually replace people to complete various tasks. Grasping is one of the most common tasks in industry and daily life. In addition to typical pick-and-place task, grasping a tool is the basis for performing other tasks, such as grabbing the key to open the door, grabbing a hammer to nail, etc. The robotic grippers are the manipulator in which the robot completes the grasp. Their performance characteristics have a significant impact on work efficiency because they are the parts interacting with the grasping objects directly. Therefore, this paper researches on robotic gripper and its related technology from the following aspects. First of all, the current robotic gripper type is analyzed in detail. Second, the research status of the most promising robotic gripper is reviewed widely. Third, the critical technology of robotic gripper is studied deeply. Finally, the analysis of robotic gripper development trend is performed prospectively.
Optimization of the position layout of in-vehicle central information display based on genetic algorithm
Authors: Xu Wenxia , Tan Jianjie , Ma Jun , Gong Zaiyan , Zhang Jing 
Published: April 2020

Abstract
In-vehicle central information display (CID) has become an essential part in the cockpit. It is of great theoretical significance and application value to optimize the position layout of CID, which help to improve driving safety and operating comfort. In this paper, the ergonomics experiment is designed and the driving simulation test method is used for the experiment. Based on the collected data for genetic algorithm, the fitness function is set, and the process of gene selection, crossover and mutation is simulated to obtain the optimized coordinates of the position layout of the central control screen. According to the results of optimization, ergonomics experiments are carried out again to verify the reliability of the optimization results. This paper has guiding significance for the development of digitalization in the cockpit.
A Range Doppler Imaging Algorithm Based on the MSR Spectrum for the Multi-Aperutre Syntactic Sonar
Authors: Lv Jinhua , Tang Jinsong , Wu Haoran 
Published: April 2020

Abstract
For ignoring the azimuth variation of the “non-hop-go-hop” time, the existing imaging algorithm for multi-aperture have a poor imaging in moderate squint, so this paper proposes a multi-aperture range Doppler imaging algorithm based on the spectrum of method of series reversion. The exact range history is approximated once, and the error can be adjusted by the order of Taylor series expansion. Then, the analytical expression of the two-dimensional spectrum is obtained by the method of series reversion. In signal processing, the signal of the single aperture is handle with the squint range Doppler imaging algorithm, and the azimuth spectrum is superposed to each aperture, to obtain the image. Finally, the effectiveness and correctness of the algorithm is provided by the simulation experiments.
Design of Cantilever Deflection Compensation Mechanism for Three-Stage Cylinder
Authors: Fan Jinwei , Tao Haohao 
Published: April 2020

Abstract
In order to solve the problem of large deflection caused by insufficient rigidity of the existing three-stage cylinder cantilever mechanism, a new design scheme is proposed. By installing lifting hydraulic cylinder at the front end of the first stage cylinder of the multi-stage cylinder and installing hinged structure at the back end of the first stage cylinder, the pitch angle of the whole cantilever is changed to compensate the deflection of the cantilever. The simulation and data fitting are carried out by using ANSYS and MATLAB software, and the measurement mode of the existing laser rangefinder is improved, and the electrical control system of the device is optimized. Finally, the deflection of the device is further reduced by optimizing the structure and control system.