bluuebunny/crossref_metadata_2025_split huggingface dataset:
Topology-Aware Software Assignment in Networked Systems
Authors: Wang Junchao , Liu Hao , Liu Zhenwu , Zhang Zheng , Pang Jianmin 
Published: June 2019

Abstract
Cyberspace mimic defense has been proven to be a revolutionary defense technology that “changes the rules of the game” to ensure the security of cyberspace. However, the software diversity inherent in mimic defense technology may increase the difficulty in managing software executable binaries, especially when updating or debugging a software. In this paper, we study the problem of software assignment in a networked system to minimise the number of binaries generated by mimic compilers. Mimic compilers can help to generate functional equivelant software executables which exhibits diverse characteristics such as binary size etc. Theoretically the software assignment problem is equal to the traditional graph coloring problem. To guarantee network severity, we apply a Welsh-Powell-based Software Assignment (WPSA) algorithm to determine the number of binaries needed and the assignment of these binaries to hosts in a network. We conduct experiments on real world network topologies. Experimental results show that our algorithm can effectively reduce the number of binaries needed in networked systems.
Automatic Segmentation and Reconstruction of Coronary Arteries Based on Sphere Model and Hessian Matrix using CCTA Images
Authors: Zhao Jie , Gong Wenke , Jiang Shizhong , Huang Zhanpeng , Qin Jiangwei , Tu Yongqiu , Zhou Sujuan , Ou Shanxing 
Published: June 2019

Abstract
Cardiovascular disease (CVD) is the most common cause of death in the world. Accurate coronary arteries segmentation is the basis for heart disease diagnose. But in coronary computed tomography angiography(CCTA) images, the complex structure of coronary vessels and the low contrast of thin vessels cause difficulty in coronary arteries segmentation. In this paper, an automatic segmentation algorithm is proposed to extract vessels from CCTA. Firstly, the hessian matrix is used to enhance vessels in CCTA images, and then, the moving sphere model we proposed is used to extract centerline of coronary arteries. Experimental results showed that the proposed model provides good-quality segmentation.
The Precise Positioning Algorithm Optimization Base on PSO-PF for Agricultural Machinery Navigation System
Authors: Yan Zhang , Jingtao Hu 
Published: June 2019

Abstract
A Modified Weight Particle Swarm Optimization-Particle Filter is proposed for the integrated navigation nonlinear system in agricultural machinery operation. The algorithm combines the advantages of particle filter and the global and local searching ability of particle swarm optimization, which modifies the particle weight and accelerates the particle convergence on optimizing particle update mode by adding advantage and disadvantage. It reduces the probability of falling into local optimum, and the global accurate positioning is achieved in a short time. The feasibility and superiority of modified weight particle swarm optimization particle filter are verified by simulation and experiment.
Probabilistic Selective Broadcast for energy-saving communications in Cognitive Ad Hoc Networks
Authors: Li Yueyue , Huang Zhong , Wen Guangjun , Ma Yugang 
Published: June 2019

Abstract
Cognitive radio, as a promising technology, plays an important role in ad hoc network communications, leading to more reasonable and orderly utilizations of wireless spectrum resources. It is not only an opportunity but also a challenge for wireless mobile communications. In cognitive radio ad hoc networks, the non-uniform channel arrays available for secondary users make difficult to the application of broadcasting technologies, concentrating on common channel selection and broadcast collision. In this paper, a probabilistic selective broadcast, called pSB, is proposed, aiming at economy and energy-saving distributed wireless communications. The protocol adopts an intelligent channel selection policy with a probabilistic forwarding strategy to alleviate collisions caused by redundant message exchanges. Consequently, the proposed pSB outperforms other methods in terms of higher message reach rates and fewer broadcast collisions evaluated by simulations under different parameter configurations.
The High Precision Capacitance Array in 16-bit SAR ADC
Authors: Li Yong-Kai , Qi Xu , Yang Ping , Cen Yuan-Jun , Li Da-Gang , Liao Zhi-Kai 
Published: June 2019

Abstract
In SAR ADC, the capacitance array is a very important unit, it will determine the conversion performance of the whole ADC. In normal semiconductor foundry, the matching precision of the linear capacitor is always about 10 bit, so it is not impossible to realize the 16-bit conversion precision in normal COMS foundry. This paper introduces a new design, for getting a smaller layout area, the main body frame of capacitor array uses the M+N+L bit sectional type; For getting the high matching precision performance, the lower bridging capacitor will be the normalized capacitor; For getting the high conversion precision, all the Upper-Bit in capacitance array will add a sub-calibrated capacitor array. So in this paper, it uses the circuit structure to realize the high precision capacitor array in 16-bit SAR ADC.
A mathematical model for reflection of electromagnetic wave
Authors: Ding Qiuyu 
Published: June 2019

Abstract
HF signal whose frequency is under MUF can propagate by reflect between the ionosphere and the earth, which can achieve a long distance communication. This paper is to solve the problem of HF propagation. We first describe the strength of reflection off the calm ocean. Then the numerical simulation ocean wave model is built and the geometry and energy characteristics of reflection wave off the turbulent ocean are determined by analytic geometry principle and Fresnel formula. We compare the strength of the two kinds of reflection waves by getting the total energy ratio between them. Finally, we take the energy loss of ionosphere into consideration and calculate the signal-to-noise ratio to determine the maximum number of hops.
Collision detection Based on OBB Simplified modeling
Authors: Zhang Rong , Liu Xiaogang , Wei Jianjun 
Published: June 2019

Abstract
This paper has analysed the most common algorithm of collision detection based on Oriented Bounding Box(OBB) simplified modeling. After that, in order to improve the efficiency of traditional collision detection algorithm in practical applications, an improved OBB collision detection algorithm is proposed.Moreover, a collision detection algorithm and the double robot coordinated motion model were built by matlab software, at the same time, a trajectory where two robots can collide with each other was built. In addition, the two algorithms were compered by changing the calculation accuracy in robot trajectory planning. Finally, the results show that the algorithm can greatly improve the efficiency of collision detection in dual robot systems.
Traditional Book Stores Industry Reforming Based on the New Management System
Authors: Luo Tianyi 
Published: June 2019

Abstract
The Book Stores industry has had its pages ruffled over the near half decade. Despite a strengthening domestic economy and rising per capita disposable income, the industry continues to experience decline. The business had negative annual growth since 2013, and there is no sign of stopping this trending. It is highly duo to two main factors, the change of consumer purchasing preference and external competitors rising.
When such a traditional business decided to embrace this new “Internet+” era by opening a new online store to reseize the market share, it needs to adopt a new management system containing technologies such as big data and cloud computing which have performed a significant role in this era. At the same time, to keep pace with the new requirements, both physical and online store needed a simple information management system and database to support their inventory and sales operations. This paper aims to set and design the database to support the operations of this industry.
Personalized employment recommendation method based on semantic matching of requirements
Authors: Wang Weihong , Feng Qian , Zhou Fuxiang , Cao Yuhui , Hongyan LV 
Published: June 2019

Abstract
Aiming at the lack of personalized recommendation method in existing employment application system, a personalized employment recommendation method based on semantic matching of requirements(PERM-SMR) was proposed in the paper.Firstly, the web crawler technology is used to collect the recruitment information and clean the data.Secondly, word2vec method was selected for corpus training to obtain the word vector model.Thirdly, we performed semantic analysis on the demand information of both sides, calculated the weight of the feature words in the text and generated text vector, and then carried out the requirement information matching and generated the recommendation list.Finally, it is verified by experiments that the PERM-SMR is more accurate and effective, and provides better employment guidance for graduates.
Morphology and Wear Resistance of HVOF Sprayed H13-WC/Ni Gradient Coating on H13 Steel Surface
Authors: Li Hongbo , Li Ban , Deng Chengxu , Wang Yijing 
Published: June 2019

Abstract
A H13-WC/Ni gradient coating was prepared by high velocity oxygen-fuel (HVOF) thermal spraying on the surface of H13 steel. The coating consists of multi-layer H13 and Ni/WC powders in different proportions with the reinforced particles of Ni/WC ratio increased by 15% (mass fraction) layer by layer. By observing the microstructures of sprayed powders and coatings and testing the thermal shock resistance and frictional wear behavior of the three coatings and matrix at 600°C, the results indicate a uniform, smooth and crack-free surface of the coating, and a good bonding between the coating and the matrix. The main mode of bonding is mechanical bonding. The average microhardness of the coating surface rises with the increasing of hard phase content, and the hardness of the section increases gradually from the matrix to the coating surface. Spot-like flaking can be observed on the H13 after thermal shock 10 times, cracks can be found on all three coatings after 15 times and cracks can be spotted on the gradient coating but falling off is not discovered after 55 times. It can be concluded that the H13 and Ni/WC coatings could improve the wear resistance of the matrix at high temperature, and the wear resistance of the gradient coating was better than that of the monolayer coating.
Structure Parameter Optimization of Welding Spot of Corrugated Plate Component
Authors: Zhang Xiang , Jia Wang , Qingzhong He , Manjiao Chen 
Published: June 2019

Abstract
A simple model is used to determine the research route of corrugated plate component with good fatigue life based on equivalent stress, and the simulation results are proved to be reasonable by physical test. It is found that the equivalent stress of corrugated plate component increases with the increase of horizontal distance between welding points during single-row welding, after the analysis of the simulation results. In all the arrangement forms, the number of welding points arranged in triangle arrangement is large, which has good connection effect on corrugated plate component and good structural stability. Therefore, it is better to connect corrugated plate component in a way of welding in row 3, with a distance of 2 mm from top to bottom, a distance of 10 mm from left and right sides of row 1 and row 3, and a distance of 37.2 mm from left and right sides of row 2. The fatigue life simulation result of corrugated plate component under the structural parameters is 7.89e6 times, and the actual fatigue life of physical test exceeded 3.0e7 times, meeting the working condition requirements.
Failure Analysis on Loosing Bar of An Elevator Brake
Authors: Ren Facai , Liang Xiao , Li Bo , Wu Xinghua 
Published: June 2019

Abstract
A failure analysis was performed on loosing bar of an elevator brake. The macroscopic morphology and metallographic microstructure of the elevator brake loosing bar were investigated based on the optical microscope and scanning electron microscope analysis. The results showed that the material of elevator brake loosing bar meets the technical standard of 45 steel. The abnormal peel wear was caused by the abnormal rotation between the loosing bar and magnetic ring.
Failure Analysis of An Elevator Brake Plunger
Authors: Ren Facai , Liang Xiao , Li Bo , Wu Xinghua 
Published: June 2019

Abstract
A failure analysis was performed on an elevator brake plunger. The macroscopic morphology and metallographic microstructure of the elevator brake plunger were investigated based on the optical microscope and scanning electron microscope analysis. The results showed that the material of elevator brake plunger doesn’t meet the technical standard of DT4.
Effect of wheel polygonization on the axle box vibrating and bolt self-loosening of high-speed trains
Authors: Shan Wei , Wu Pingbo , Wu Xingwen , Zhang Fubing , Shi Huailong 
Published: June 2019

Abstract
The wheel polygonization has become a great concern for the high speed rail vehicle owing to its highly adverse effects in high speed condition. Such periodic distributed wear along the wheel can give rise to high magnitude of high frequency impact loads at the wheel/rail interface and further contribute to severe fluctuations in axle box acceleration and the self-loosening for axle box bolts. In this study, the wheel polygonization-induced axle box vibrations and bolt self-loosening are thus initially investigated through the field tests and the roller test rig. Subsequently, a coupled vehicle/track dynamic model integrating a typical high speed rail vehicle and a flexible slab track is formulated to identify the mechanism of bolt self-loosening in the presence of wheel polygonization. The results suggest that the wheel polygonization can result in high magnitude accelerations in the axle box, and excite some of vibration modes of the axle box and its end cover. The accelerations on the axle box end cover are much larger than those obtained on the axle box, which is also comparable to the experimental results. It is thus believed that the self-loosening of axle box end cover’s bolts is mainly attributed to the severe oscillations on the axle box due to the wheel polygonization.
Study on efficient and green reduction of graphene oxide by a one-step hydrothermal method
Authors: Zhi Maoyong , Liu Quanyi , Chen Hao , Feng Sihai , He Yuanhua 
Published: June 2019

Abstract
This work reports an efficient and green reduction method of graphene oxide (GO) by a one-step hydrothermal process. GO was prepared by the oxidation of graphite using a modified Hummers method. The reduced graphene oxide (rGO) were characterised and studied by means of UV-vis absorption spectra, Raman spectroscopy and transmission electron microscope (TEM) techniques. UV-vis absorption spectra revealed that GO was successfully reduced to rGO and the π-conjugated structure was restored. Raman spectroscopy suggested that rGO had a smaller average size of the in-plane sp2 domains and more sp2 domains than that of GO. Fourier transform infrared (FTIR) spectra demonstrated that most oxygen functionalities on the GO were removed after the reduction. TEM images further confirmed that there was no irreversible agglomeration of rGO layers. Furthermore, we proposed a possible mechanism for the reduction of GO with subcritical water under hydrothermal condition. This study provides a novel idea for developing environmentally friendly reduction methods of GO.
Research and Implementation of Modbus TCP Security Enhancement Protocol
Authors: Xuan Luo , Yongzhong Li 
Published: June 2019

Abstract
Considering the security problem of Modbus TCP protocol, such as the lack of authentication mechanism, the protection mechanism of data transmission and abuse of function code, a secure industrial control communication protocol(Modbus-S protocol) is designed based on the original Modbus TCP protocol, which uses symmetric key algorithm to ensure the confidentiality of data; the uniqueness of data is guaranteed by the synchronization mechanism based on hash algorithm; digital signature algorithm is used to ensure the verifiability and integrity of data; finally, “White List” filtering mechanism is used to manage function codes based on roles to effectively prevent abuse of function codes. Through the verification and analysis of experiment, Modbus-S can fully compensate for the design defects of Modbus TCP protocol. Compared with the existing methods, this method has higher security and can comprehensively improve the communication security of Modbus TCP protocol.
Simulation of Urban Rainstorm Waterlogging and Pipeline Network Drainage Process Based on SWMM
Authors: Zhang Sui , Zhe LI 
Published: June 2019

Abstract
Urban flood has already become weaknesses of flood control system in China. Flood and pipeline drainage calculation based on hydraulics model plays a key role in flood monitoring, warning and control management. On the basis of the topographic maps (high-precision DEM), underground drainage networks, land use and rainfall data in Enshi City, a SWMM-based urban flood model is constructed, which is applied to calculating rainstorm waterlogging and pipeline drainage process under the designed storm probability of 0.01, 0.02 and 0.05, and the designed storm period of 1 hour and 3 hours. The pipeline drainage peak flow of different pipeline type is also retrieved. And results suggest that SWMM is a reliable urban storm water model, which is suitable for urban storm flood simulation and pipeline network drainage analysis.
Design and Implementation of Control Unit for Medium and Short Wave Broadcast Exciter Based on STM32
Authors: Liu Xi , Lu Qibin 
Published: June 2019

Abstract
This paper designs a control unit of medium and short wave broadcast exciter based on STM32F107 microcontroller and Ethernet PHY device DP83848. It mainly designs and analyses the modules of human-computer interaction and Ethernet communication. The hardware and software design of the control unit is described in detail, and the remote control function is realized by building Web server with LWIP. The test results show that the programme has reliable performance, easy to use, low in cost, and has a good application prospect.
Integrative Landslide Emergency Monitoring Scheme Based on GB-INSAR Interferometry, Terrestrial Laser Scanning and UAV Photography
Authors: Zheng Xiangtian , Yang Xiaolin , Ma Haitao , Ren Guiwen , Yu Zhengxing , Yang Feng , Zhang Hao , Gao WenYuan 
Published: June 2019

Abstract
In this study, an integrated remote sensing scheme comprised of a Ground-based Interferometric Synthetic Aperture Radar (GB-InSAR), Terrestrial Laser Scanning (TLS) and an Unmanned Aerial Vehicle (UAV) is utilized for rockslide emergency monitoring. GB-InSAR, here proposed as surface deformation monitoring of residual dangerous rock mass, provides data support and decision basis for the study of secondary slope instability. TLS grasps the landslide body as point cloud, and the 3D modelling of the main hidden danger area of secondary sliding at the site. UAV obtained timely geographic information about disasters, investigated potential hazards and shared them in real time. A case study, based on the entrustment of China Ministry of Emergency Management (CMEM) and China Institute of Geological Environment Monitoring (CIGEM), deals with a rockslide locates at K18+350 Junhong Road (Beijing, China). First, acquired data are processed for early warning of hazard to ensure the safe transfer of personnel and property within 72 hours in villages and towns affected by dangerous rock masses. Second, the monitoring services ongoing on accurately measurement of each hidden risk spot in the spatial coordinates, elevation and dynamic change and influence range. The methodology has been proved effective in emergency management.
Error Performance of DPSK Satellite-to-Ground Laser Communication over Atmospheric Turbulence and Pointing Errors
Authors: Hao Shiqi , Wan Xiongfeng , Zhao Qingsong , Xu Chenlu 
Published: June 2019

Abstract
In satellite-to-ground laser communication, atmospheric turbulence will seriously deteriorate the system performance. The DPSK modulation technology is usually used to control the influence of atmospheric turbulence. The Meijer G-function is used to give the closed-form expression of the average bit error rate (ABER) of the system considering the combined influence of the atmospheric turbulence and the pointing errors, where the atmospheric turbulence channel is submitted to the Gamma-Gamma distribution and the pointing errors is submitted to the Beckman distribution. Through numerical simulation, the influence of system transmitting power, normalized beam width and zenith angle on the BER performance of the system is analyzed. The simulation results show that the ABER of the system decreases with the increase of the transmitting power, the error performance of the system considered the bias errors is obviously higher, and the error performance is also different when the azimuth and elevation normalized jitter deviation are not equal. The system performance will decline rapidly with the increase of the zenith angle. The BER of the system decrease firstly and then increase with the increase of the normalized beam width, and the optimal normalized beam width can be found to achieve the best performance.
Construction Exploration of Chongqing Environmental Supervision Information System under the Background of Environmental Protection Vertical Reform
Authors: Luxiao Wang , Xiaoyan Huang , Rong Jiang , Xiaoming Hu 
Published: June 2019

Abstract
According to the environmental protection vertical management reform requirement, the environmental supervision information system was designed based on the existing informational situation and the responsibility of Chongqing environmental supervision office. The system built the whole management process of collecting, screening, assigning, examining, checking, feedback, verification and canceling problems. The integrated environmental supervision information system established the vertical and horizontal data exchange channel among the ministry of environmental protection, Chongqing environmental protection bureaus and the municipal departments. It not only provided an information working platform for the supervision of environment supervision office, but also provided a good example for environmental supervision information construction.
Preliminary Discussion on the Application of Internet in Tobacco Monopoly Retail License Management
Authors: Yang Tian , Fan Xiangyu , Hongwei LU 
Published: June 2019

Abstract
It is expounded that the background and necessity of tobacco monopoly retail license online processing, is analyzed that the advantages and functions of Internet technology to solve tobacco monopoly retail license processing, and is put forward the development and application strategy: the construction of Wechat communication module of the application link of business households; establishing retail license processing module and carry out extensive publicity; establishing the feedback module of retail license handling, and promoting the interaction between government, enterprises and business households.