bluuebunny/crossref_metadata_2025_split huggingface dataset:
An enhanced path planning method for unmanned surface vehicle based on JPS+ and goalbounding algorithm
Authors: Xu Xiaoqiang , Li Xiaohan , Zhan Ao 
Published: August 2019

Abstract
The path planning issue in complex environments remains an challenging problem in the field of unmanned surface vehicle (USV) navigation due to its complexity and the nature of nondeterministic polynomial-time hard (NP-hard). Aiming at generating a safe path for the USV within tractable time, this paper proposes an enhanced path planning method via integrating JPS+ algorithm and the goalbounding algorithm. Firstly, principles of the JPS+ and goalbounding algorithms are respectively analysed and investigated in this study. Subsequently, the application platform of the proposed path planning approach for USV is established via combining the YimaEnc electronic chart with WinForm dialog. Finally, the performance of the proposed method is validated through some numerical simulations against some other well-known path planning methods. The simulation results confirm that the proposed method performs superior to the artificial field method and A* algorithm in terms of the computation time and the path safety. Besides, the superiority of the proposed method over the artificial field method and A* algorithm is more significant in the long-distance path planning scenarios as far as the computation time is concerned.
Numerical analysis of an information propagation model
Authors: Wang Qin , Wang Xiao-li 
Published: August 2019

Abstract
In recent years, information science theory has increasingly highlighted its important influence in the academia, and the numerical analysis method of information dissemination model has achieved rapid development. In this scenario, firstly, this study establishes an information dissemination model based on the classical information theory. Secondly, based on the system stability criterion in the control theory, the basic regeneration number of the model is derived. Thirdly, combined with the classical numerical analysis theory such as Runge-Kutta method, the numerical analysis of the established information propagation model is carried out. The proposed numerical analysis method shed important light on expanding the information science theory.
Research on Cross-version Software Defect Prediction Based on Evolutionary Information
Authors: Yao Zhexi , Song Jiawei , Liu Yushuai , Zhang Tao , Wang Jinbo 
Published: August 2019

Abstract
Software defect prediction is an important part of the software testing field. According to the characteristics of object-oriented software, this paper considers the evolution information separately in different packages and summarizes the evolution metrics that affect the defect prediction. Existing research on evolutionary information often ignores the impact of newly added and disappearing classes on software defects prediction. Based on these factors, evolution metrics are proposed and applied to defect prediction. Two evolution metrics, transition class ratio and static metric category number, are proposed for object-oriented cross-version defect prediction. Experiments are carried out in the commonly used software defect prediction set. The experimental results show that the proposed metrics have better defect prediction ability than the traditional static metric.
A new fast corner detection method based on template matching
Authors: Yanling Zhang , Xixi Cheng , Lu Qiao , Pengfei Cui 
Published: August 2019

Abstract
Corner detection is the basic link of camera calibration, and its detection accuracy will directly affect the accuracy of camera calibration. In order to improve the extraction precision of the corners of the board, this paper put forward a new checkerboard corner detection method. Two kinds of corner point prototype templates are constructed by using the characteristics of the checkerboard. The similarity between the pixel points and the corner points is calculated by convolution of the convolution kernel and the image. The degree of similarity is used to distinguish the corner points from the non-corner points. The non-maximum suppression algorithm and the gradient statistical algorithm further screen out the target corner points. The experimental results show that the method used in this paper can accurately and quickly detect the corner position and has strong anti-interference ability.
Research on Intelligent Access Control System Based on Interactive Face Liveness Detection and Machine Vision
Authors: Shi Wenfeng , Li Jun , Ding Yuanjun , Zhou Kuan 
Published: August 2019

Abstract
With the improvement of people’s safety awareness and the renewal of smart home technology, access control security has become a special concern of community, schools and enterprises. How to achieve efficient, convenient, safe and intelligent access control management is the main research direction in the field of smart home right now.Based on multi-task cascade convolutional neural network (MTCNN) and improved face recognition algorithm k-Nearest Neighbor (KNN), this paper proposes an interactive face liveness detection method by eye and mouth state.According to this method, an intelligent access control system based on machine vision is designed.The system solves the problem of identity forgery attacks by calling the camera to track the face in real time and issuing randomized action instructions to the user,after confirming that the object being detected is a living body and the face information matching is successful, the door lock will be opened.The experiment shows that the face recognition rate of the system can reach 98.3%, which has good practical significance.
Research on the motivation to contribution and influencing factors of university students——a semi-structured interview based on qualitative research
Authors: Li Yueyao , Deng Sanhong , Zhang Yue 
Published: August 2019

Abstract
Due to the lack of theoretical knowledge and practical experience, the university students have many deficiencies in contribution. We conducted semi-structured interviews with 28 undergraduate and postgraduate students of Nanjing Agricultural University. At the same time, we used descriptive statistics and cross-analysis methods to analyse the motivations of college students’ initial contribution and the influencing factor of their choice. Based on this, this paper puts forward some suggestions for the initial submission of college students, and the journals are also provided for reference in the selection of manuscripts.
Simulation and Experimental Study of Low Voltage Power Line Carrier Communication
Authors: Wang Bochuan , Wu Xixiu , Hu Yunfeng , Li Chao 
Published: August 2019

Abstract
This paper presents the simulation and experimental research of low-voltage power line carrier communication. The choice of communication method is an important factor in determining the communication quality of the communication system. For the communication mode of low-voltage power line as carrier, this paper prefers the direct sequence spread spectrum communication system as the communication method. In this paper, the simulation function is realized by establishing various parts of the system simulation model. The simulation reflects the stability of the direct sequence spread spectrum communication system and has strong anti-interference ability. In this paper, the spread spectrum communication method is used to simulate low-voltage power line communication in the laboratory environment, and good results are also obtained. The direct sequence spread spectrum communication system is a better choice for low voltage power line carrier communication.
Optimal reconfiguration of active distribution network considering flexible load scheduling
Authors: Xia Mingchao , Yang Shuai , Chen Qifang 
Published: August 2019

Abstract
At present, most of the existing optimal reconfiguration method of active distribution network (ADN) aims at the change of network topology, without considering flexible load. This situation makes a low efficiency of the existing method when facing the situation with large amount of flexible load in ADN. A bi-layer optimal reconfiguration model including an outer layer and inner layer is presented considering flexible load optimal dispatching to improve the efficiency of ADN reconfiguration. Unlike the conventional method, the two layers of the proposed bi-layer method are combined in each iteration. At each iteration the reconfiguration scheme is obtained by solving a binary optimal model in the outer layer, and the flexible loads are optimized in the inner layer. So, the optimal network topology and the optimal flexible load scheme are obtained at the same iteration. This would increase the efficiency of the reconfiguration scheme than that get by the conventional two-stage method. Finally, the importance of flexible load during ADN reconfiguration is proved, and the validity of the proposed method is verified by the comparison simulations.
Research on Cloud Computing Resource Scheduling Strategy Based on Firefly Optimized Genetic Algorithm
Authors: Han Yaning , Wang Jinbo , Yao Zhexi 
Published: August 2019

Abstract
In the cloud computing system environment, combined with the first-level scheduling model of task-virtual machine resource nodes, the individual coding, fitness function, selection replication and cross-variation process are redesigned, and the cloud computing resource scheduling model based on genetic algorithm is established. Corresponding to fireflies and virtual machine resource nodes, this paper redesigned the firefly decision domain update method, selected attraction probability formula and location movement strategy, and combined with genetic algorithm to establish cloud computing resource scheduling model based on firefly-genetic algorithm. Experiment with the CloudSim cloud computing simulation platform. The results show that the task completion time of the resource scheduling model is smaller than that of the single genetic algorithm. The virtual machine load is more balanced, the task completion time is short, and the overall optimization effect of the resource scheduling scheme is obvious.
Knowledge Reduction Model of Crowd Evacuation Stability Based on Rough Set Theory
Authors: Zhao Rongyong , Liu Qiong , Li Cuiling , Dong Daheng , Hu Qianshan , Ma Yunlong 
Published: August 2019

Abstract
To reduce the redundant knowledge discovered from the evolution of crowd evacuation in case of emergencies, this paper aims at knowledge reduction model of crowd evacuation stability evolution. First, the evolutionary mechanism of evacuation stability state is analysed from the perspective of knowledge engineering, and the characteristics of evacuation scenario elements such as physical properties of crowd, structure of evacuation scenario and psychological behaviour of evacuees are analysed and extracted by using self-organizing mapping network algorithm; Secondly, the evolutionary characteristics of evacuation scenario elements and evacuation stability state are discretized and mapped to conditional attributes and decision attributes in rough set universe respectively. Thereby a knowledge representation method of evacuation stability evolution mechanism based on rough set decision information table is constructed. Then, the improved attribute reduction algorithm based on discernibility matrix is used to reduce the knowledge of decision information table processed by self-organizing network algorithm. Finally, a knowledge reduction model of crowd evacuation stability based on rough sets is proposed. It is validated effective to achieve the decision-making of crowd stability, and which provides theoretical basis and methodological support for scientific guidance of emergency evacuation.
Discussion on the Improvement of Current Carrying Capacity of AC 500kV Submarine Cable
Authors: Liu Zongxi , Ouyang Benhong , Liu Songhua , Chu Fanwu , Li Te 
Published: August 2019

Abstract
A three-dimensional electro-thermal coupling physical and mathematical model of the submarine cable landing section together with the cable trench was established to analyze the effect of the current-carrying capacity improvement scheme of the 500kV submarine cable. The effects of three types of submarine cable landing section current carrying capacity improvement schemes were analyzed and compared. The research results show that the flow rate of the medium around the cable in the cable trench (fluid medium), thermal conductivity, temperature of the cooling medium and the arrangement of the submarine cable affect the current carrying capacity. The fluid medium in the cable trench that is forced to flow along the radial direction of the cable can fully exert the heat absorption effect of the cooling system in the cable trench. The greater the thermal conductivity of the medium around the submarine cable, the Joule heat generated in the submarine cable conductor dissipates more quickly, reducing the temperature rise of the cable conductor, which is beneficial to increasing the current carrying capacity of the submarine cable. The research results have guiding significance for the selection and engineering design of submarine cables.
Use of heat mirrors on field of renovation of window structures
Authors: Bizonova S 
Published: August 2019

Abstract
The paper presents the results of the analysis of several variants of glass systems using low emissivity heat mirror films. The subject of the paper is the determination of the thermal-optical parameters of the structure as well as the analysis of surface temperatures of the considered glass systems, which were obtained by calculation. The result is optimization of the structure which will be the subject of further research.
Analysis of an experimental tension structure
Authors: Kapolka L 
Published: August 2019

Abstract
This article builds on the article written last year. The paper is the comparison between the results from the first numerical pre-analysis of the construction of an adaptive hyperbolic paraboloid, the results of which were used as input data for the design of the experimental device in the laboratory at the Faculty of Civil Engineering of the Technical University in Košice with the newest results gained from the numerical model created according to documentation from the manufacturer of this device. The structural numerical model was modeled in regard to geometry, materials and cross-sections characteristics, weight distribution, existing eccentricity and it was created in Dlubal software based on finite element method.
Dynamic influence of a swinging bell on a traditional wooden structure of the Lemko orthodox church belfry
Authors: Kochański T 
Published: August 2019

Abstract
Paper treats about dynamic influence of a swinging bell on a traditional wooden structure of the orthodox church belfry (example calculations made for a bell and belfry of the Lemko’s orthodox church). On the basis of the conclusions of the analysed belfry, there were made modifications aimed to improve its dynamic parameters. The brief summary provides comparison between the effects of such modifications and existing wooden structure.
Assessment of the possibility of using modern diagnostic methods to determine the changes in the properties of timber elements installed in a river bed
Authors: Kotásková P. , Fialová J. , Tippner J. , Marková J 
Published: August 2019

Abstract
The aim of the research was to find out which non-destructive methods can be used for determining the properties of wood placed in humid area and water. The research was carried out in order to propose suitable methods for detecting state of timber during regular inspection and maintenance of timber structures and elements in the watercourse. Wooden thresholds located in the watercourse belonging to the Divoká Orlice River Basin were selected for the measurement. The measured timber elements were already 9 years in the flow and the degree of damage to the built-in wood had to be assessed. The extent of biotic damage to water-soaked wood cannot only be determined by sensory methods. Resistance stop devices, a non-destructive ultrasonic device, a micro drill and an acoustic tomograph were selected for the evaluation. However, all commonly used modern diagnostic methods used for measurements in dry environment surveys cannot be used in the above terrain.
The Effect of Openings on Stress Distribution in Glass Beams – Dependence on Diameter of Openings
Authors: Lavko M , Kvočák V , Sokol Z 
Published: August 2019

Abstract
Presented paper describes the behaviour of simply supported single ply glass beam with discontinuities in its geometry. Discontinuity is introduced by four openings symmetrically placed over the beam. This type of simplified structure represents cut out of real constructions where similar glass components are used as primary load bearing structures supporting glazing of roofs or decks of pedestrian bridges. The main focus of this article is in research of stress distribution around openings and how different diameter of a hole influences stresses in its close proximity. As Eurocode standards for glass structures are still not codified and most of the nowadays literature only provide suggested diameters of holes based on the thickness of the glass pane, this paper will provide the future designers of glass load bearing structures with closer look at stress distribution around mentioned area. In order to bring those informations to theirs seekers, both experimental analysis and numerical analysis together with parametric study were used.
Semi-rigid operation of connection in timber engineering
Authors: Neusch M , Sandanus J , Sógel K 
Published: August 2019

Abstract
Consideration the semi-rigid behaviour of connections is an essential part of the modern way of the design of timber load-bearing structures. The computational models using the finite element method allow us to easily replace the use hinge operation with the appropriate stiffnesses of connections in the design. Taking the stiffness of the joint into consideration can have a significant influence on the load distribution and on the stiffness of the object as a whole. The paper contains the calculation process of the stiffness of selected connections. The mentioned stiffnesses could be used in modelling of timber load-bearing structures.
Usage of true stress-strain curve for FE simulation and the influencing parameters
Authors: Petrík A , Ároch R 
Published: August 2019

Abstract
Computer simulations require appropriate input data to match the relevant calculated results with those of experiments. The true stress-strain curve suitable for finite element analysis is describing the non-linear behaviour of the steel material with a proper pre-peak as well as necking stress-strain relationship. The pre-peak part of true stress-strain curve can be easily covered by an analytical method (i.e. logarithmic equations), but the necking part of the curve cannot be described by such a relationship between the normalized and the true stress-strain curves. Simple tensile test of steel specimen was performed to establish the true stress-strain curve in ANSYS software. Different sizes of finite elements were applied for the non-linear FE analysis to find an appropriate size function while creating the necking part of true stress-strain curve using an iterative method. Stress and strain from the computer analyses were compared with the results of the tensile test. The dependence of size of finite elements and/or element type was analysed to achieve the most precise results.
The Influence of corrosion on the stresses in members of open deck railway bridges
Authors: Štecák R 
Published: August 2019

Abstract
Nowadays, many old riveted railway bridges, mainly their members of the open deck, are corroded. The paper demonstrates the influence of corrosion on a stringer beam and on a cross-girder beam of a particular steel truss railway bridge in Slovakia. This is an important step in the assessment of the loading capacity and the residual lifetime of this bridge. A simple beam FEM model was refined by modelling the investigated members as plate elements. In such a way the real boundary conditions of the members were modelled most realistically by keeping the model as simple as possible at the same time. The stresses in the members were first calculated with the original cross-sectional dimensions and the results were compared with the real measured corroded cross-sections. A future corrosion rate was estimated and calculation of this case was also performed. The influence of stringer to cross-beam rigidity, the size of 2D FEM elements, and the steel material model (linear, bilinear with 1% hardening) were investigated too.
Proposal of utilized to the lift for evacuation of persons
Authors: Szénay M 
Published: August 2019

Abstract
In 2010 Averill defined in his work five challenges for the solution of evacuation of persons in buildings to 2020. One of the challenges is to implement helpfull technologies during evacuations from buildings – lifts. The aim of the work was to find the ideals of the design of the necessary type and number of lifts. The numerical calculation method was used using simulation software. A model of a fifteen-storey building with multiple versions of the lifts was created. The results showed what type and number of lifts brought the desired shortening of the evacuation time. Conclusion is the recommendation of an ideal lift design.
The preparation method and performance analysis of coated kraft paper with wear resistanc
Authors: Zhao Yu , Liu Linlin , Qu Fang , Gao Haoyu , Chen Wenqian , Li Xin , Huizhong Zhang 
Published: August 2019

Abstract
The goal of the research is to improve the surface states of kraft paper and to make coated kraft paper with wear resistance suitable for packaging material. Based on wear and coating mechanism, the research analyzed and compared the characteristics and microstructure of uncoated paper and coated paper.The result shows that coating can reduce the surface resistance and friction of paper.Kraft paper was coated with the VaporCoatTM2200.s coating in the research. The research studied the influence of coating process on wear resistance of coated kraft paper.Two hundred groups of experimental datum of each sample show that the optimal coating weight is 18g/m2. As expected, coated kraft paper has better wear resistance and other performance than the uncoated kraft paper. The results show that the coating technology is an inexpensive and environmentally friendly process. The research provides the theoretical basis and data supporting for packaging enterprises to produce the coated paper-based packaging materials with wear resistance.
Calculation of Tensile Strength of Unidirectional Composites Based on Probability Theory and Monte Carlo Method
Authors: Zou Jiajun , Cao Ruizhi , Shao Minqiang 
Published: August 2019

Abstract
In this paper, Monte Carlo method combined with the random critical-core probability model is proposed to calculate the longitudinal tensile strength of unidirectional composites. This method considers two-dimensional distribution of fibers on the cross-section, while the theoretical analysis method only takes the linear distribution of fibers into account. Using the weakest link principle, the failure probability and average strength of the unidirectional composites are obtained. The results show that the calculated values of longitudinal tensile strength of T300/5208 composite and unidirectional C/C composites agree well with the experimental results.