bluuebunny/crossref_metadata_2025_split huggingface dataset:
Trajectory Design and Optimization Tool for Deep Space Exploring
Authors: Zhang Jin , Wang Zhongsheng , Zhou Jianyong 
Published: November 2019

Abstract
The trajectory design and optimization based on astrodynamics plays an important role in the mission design of deep space exploring. A convenient tool for trajectory design and optimization of deep space exploring has been developed, which consists of three major functional modules. The first module can help design and optimize the trajectory using gravity-assist maneuvers, the second module is used to design and optimize the trajectory using low-thrust propulsion, and the third module helps design the low-thrust gravity-assist mixed trajectory. Moreover, friendly user interfaces are implemented for the problem inputs, and the results are shown by both the data reports and some customizable figures.
Global asympototic stability of predator-prey systems with stage structure and nonlinear birth rate
Authors: Huang Xinyu , Yue Qin 
Published: November 2019

Abstract
A predator-prey model with nonlinear birth rate and stage structure on prey species is revisited in this paper. By using the comparison theorem of differential equation and constructing some suitable Lyapunov function, we are able to show that the conditions which ensure the locally asymptotically stable of the equilibria is enough to ensure its globally asymptotically stable. Finally, the obtained results have substantially improved and extended the corresponding results of predecessors.
Empirical Analysis of Carbon Price Based on EGARCH
Authors: Mou Yunhan 
Published: November 2019

Abstract
The carbon trading market has been increasingly heated for more than a decade, and its market participants and market rules are not exactly the same as traditional stock or exchange rate markets. Based on the mature and efficient GARCH series model, this thesis analyzes the rules of the carbon trading market. Starting from the actual data, it studies the conclusions and models applicable to carbon trading market from both qualitative and quantitative perspectives.
Research on Failure of Tee Pipe Based on AutoPIPE
Authors: Ni Lingying , Zhen Qiang , Li Bing 
Published: November 2019

Abstract
During the construction of a tunnel beneath a buried oil pipeline, leakage occurred in the tee near the elbow due to accidental collision of construction equipment on the pipeline. In order to analyze the failure reason of tee near elbow, based on the interaction mechanism between ideal elastic-plastic soil and pipeline, the pipeline model was established by using the method of equivalent external load with uniform load, and the pipeline simulation and stress analysis were carried out by using AutoPIPE software. The results show that the allowable stress is not exceeded in the section directly subjected to external loads, but the actual stress value exceeds the allowable stress value due to the concentrated stress near the elbow, which is the main reason for the failure of the tee.
Stability Analysis of an Online Game Addiction Model with Relapse and Time Delay
Authors: Guo Youming , Li Tingting 
Published: November 2019

Abstract
In order to simulate the process of game communication, a SIPQ model with relapse and time delay is constructed, which includes susceptible, infective, professional and quitting compartments. We also consider that the direct transfer from the susceptible individuals to the professional individuals. The global dynamics of the model are determined by the basic reproduction number R0. The locally asymptotical stability of disease-free equilibrium is derived.
Analysis of Uncertainty and Advanced Solutions in Enterprise Supply Chain Management Based on Game Theory
Authors: Lixinyu  
Published: November 2019

Abstract
The so-called supply chain refers to the network chain structure formed around the core enterprises, namely suppliers, manufacturers, distributors, final customers, logistics service providers and even supplier suppliers and distributors. An effective supply chain system allows companies to plan and utilize resources from a global perspective. Through the construction of management strategies, management processes, partnerships and information systems, real-time monitoring and regulation of the operation of various business activities within the enterprise. Fundamentally speaking, whether the supply chain node enterprises establish cooperative partnership is a game problem between node enterprises. We need a lot of practical support, more efforts and research work. Only by establishing long-term strategic partnership among supply chain node enterprises can a win-win situation be created and higher profits be brought to enterprises. That is to say, to achieve collective rationality on the basis of individual rationality and to achieve optimal cooperation.
Microstructure and tensile properties analysis of a long-diameter nozzle flowmeter
Authors: Ren Facai , Zhang Mingxian , Tang Xiaoying 
Published: November 2019

Abstract
The tensile properties of materials used in flowmeters at room temperature and high temperature were studied. The tensile tests were conducted in the range of 23 °C to 600°C and strain rate 0.1s−1. The fracture morphology was analyzed by scanning electron microscope. The results show that the microstructures are ferrite and pearlite. The content of each element meets with the corresponding standard.
Performance analysis of a venturi flowmeter
Authors: Ren Facai , Wu Xinghua , Tang Xiaoying 
Published: November 2019

Abstract
The mechanical properties, microstructure and chemical composition of a venturi flowmeter were investigated. The tensile tests were conducted at 23 °C and 520°C with different strain rates. The fracture surface of tensile specimens was analyzed by scanning electron microscopy. Microstructure of the venturi flowmeter material was analyzed by optical microscope. The results show that the chemical constituents meet the requirements of relevant standards.
Research On LDPC-DFH Code Modulation And Demodulation System Based On Hard Decision Decoding
Authors: Zhang Chunming , Tian Minghao 
Published: November 2019

Abstract
In order to reduce the bit error rate of differential hopping transmission, differential frequency hopping (DFH) is combined with low density parity check code (LDPC). On the basis of not adding more system complexity, the hard decision bit inversion algorithm (BF) and weighted error check based bit inversion algorithm (WVBF) are proposed to decode LDPC-DFH system. The check matrixes of different generation methods are used respectively. The BF decoding method and WVBF decoding method are used to simulate the Gaussian channel and Rician channel. The influence of different decoding methods on the bit error rate is discussed. The simulation results show that the BER of the DFH system with LDPC code is lower than that of DFH without LDPC, and the WVBF algorithm is better than the BF algorithm.
Design of Traffic Monitoring System Based on Video Detection
Authors: Hong Yu 
Published: November 2019

Abstract
Traffic monitoring system is an important means to ensure the safe operation of traffic. According to the characteristics of road traffic monitoring environment, a real-time traffic monitoring system is designed by using image processing, computer vision, pattern recognition and other technologies. Experiments show that the system can effectively detect various typical traffic incidents and traffic operation parameters, and provide a favorable guarantee for traffic safety.
Application of DRT in College English Reading Teaching
Authors: Meng Xiang 
Published: November 2019

Abstract
Discourse Representation Theory is a dynamic semantics theory (DRT). It breaks away from the restriction of first-order predicate logic and extends the processing object to discourse above a sentence. The study of natural language by DRT involves not only the truth condition of sentences, but also the specific context, which is in line with the cognitive process of understanding language. The application of DRT in College English reading teaching helps students understand the cognitive relationship between sentences in a text and helps students understand the connotation of a text.
Construction of Multi-evaluation System of Practical Tourism Korean Flip Classroom Teaching Based on CIPP
Authors: Yi Dong 
Published: November 2019

Abstract
The reversed classroom teaching mode has attracted much attention because of its subversion of the teaching process and the cultivation of students’ various abilities. Due to the free learning environment and perfect resource support, the reversal of classroom teaching mode has achieved fruitful results. In the process of implementation and promotion of tourism Korean flip classroom, some problems have gradually emerged. The lack of evaluation criteria has become a major problem faced by tourism Korean flip classroom teaching mode. CIPP evaluation model, which emphasizes process improvement and process evaluation, and teaching feedback, is especially suitable for the needs of educational reform activities for educational evaluation, and also fits in with the characteristics of overturning the diversity of classroom teaching objectives and the advancement of teaching process. This paper studies the evaluation system of tourism Korean language teaching based on flipped classroom, constructs a multi-evaluation system of students’ learning in flipped classroom based on CIPP, probes into the meaning and classification of tourism Korean language teaching evaluation, and analyses the multi-evaluation model.
Research on Color Design in Interactive Animation Design of Multiculturalism in the Information Age
Authors: Jingjing Zhao 
Published: November 2019

Abstract
Interactive animation design, as a branch of the animation field, has received much attention in recent years. From web pages to personal operating systems, more and more interactive designs are emerging in people’s lives. As an important part of the interactive animation design field, rich color design will surely enter the designer’s vision in the field of interactive animation design. In this paper, the multi-culture of information age integrates the basic concepts and characteristics of interactive animation, and illustrates the visual turn of interactive animation aesthetic objects with specific cases. Combined with the technical and cultural characteristics of interactive animation, this paper expounds interactive animation. Virtual interaction. Animate the aesthetic experience and bring it to the participants. A more realistic immersive experience that analyzes the use of color design in interactive animation design.
Integrated scheduling methods of maintenance support resource
Authors: Guan Chongchong , Lu Hui , Liu Yaxian 
Published: November 2019

Abstract
Maintenance support resource scheduling (MSRS) problem has attracted increasing attention in modern battle. Its objective is minimizing execution time of allocating multiple resources from multiple supply centers to tasks. As a NP-hard problem, there exist various constraints in the MSRS problem, including resource demands of tasks, resource reserves of supply centers and transport paths constraint. In this paper, we first build two models taking route planning and resource scheduling into consideration simultaneously. Then, with cutting plane approach and dual algorithm, we can obtain the optimal scheduling schemes corresponding to two models. Besides, the performance of the two approaches are verified with different scale instances.
CIRCULARITY: A Metric for Region Template Selection in Airborne Vision Navigation
Authors: Hua Haiyang , Shi Zelin , Liu Yunpeng 
Published: November 2019

Abstract
Reliability template is a key factor of airborne vision navigation system. This paper proposes a new metric for region template selection. Firstly, a measurement model for uncertainty and inaccuracy of edge feature is given in detail. Furthermore, the influence of spatial distribution of edge features of correct recognition probability is analyzed in statistical probability theory. Then an “ideal” spatial distribution of region template which is the most easy to be recognized is proved by extreme-case analysis. Finally, a new metric is proposed by calculating the shape distance from this “ideal” spatial distribution, called CIRCULARITY, which can be deemed as “geometry self-similarity” to one target. The validity of new metric is experimentally demonstrated by using real ground targets. The results show that the new metric can meet the requirements of matching area selection and generating template.
Vehicle and Parking Space Detection Based on Improved YOLO Network Model
Authors: Ding Xiangwu , Yang Ruidi 
Published: November 2019

Abstract
YOLO has a fast detection speed and is suitable for object detection in real-time environment. This paper is based on YOLO v3 network and applied to parking spaces and vehicle detection in parking lots. Based on YOLO v3, this paper adds a residual structure to extract deep vehicle parking space features, and uses four different scale feature maps for object detection, so that deep networks can extract more fine-grained features. Experiment results show that this method can improve the detection accuracy of vehicle and parking space, while reducing the missed detection rate.
An Ontology Constructing Technology Oriented on Massive Social Security Policy Documents
Authors: Gang Liu , Hanmo Zhang , Wangyang Liu , xu Cheng , Hanwen Zhang 
Published: November 2019

Abstract
Because of the huge number of policy documents in the field of social security, there is a need to manage these information. In this paper, ontology is used to represent and store information in files. In order to ensure the accuracy of ontology structure, this paper first constructs ontology framework manually, and then extends ontology framework by the inclusion relationship between attribute set and object set. At the same time, this paper adopts the idea of statistics and rules in the field of natural language processing, extracts hierarchical and non-hierarchical concepts from the lexicon of social security field to construct ontology, and then puts forward the statistical models of concept phrase vector and high-frequency phrase vector. The experimental results show that the semi-automatic ontology construction process in the field of social security can effectively propose social security ontology from a large number of policy documents. The experimental results play a reference role for ontology construction in other fields.
Research on Two Types of Estimation Algorithms in Carrier Tracking Loop
Authors: Qi Hangtian , Zhang Xiaolin 
Published: November 2019

Abstract
This paper analyzes two estimation algorithms in the carrier loop, i.e. maximum likelihood estimation (MLE) and modern filtering based on Bayesian recursion. The limitations of the MLE algorithm are pointed out by establishing the MLE model. In addition, several modern filters based on Bayesian recursion are analyzed. In this process, the article draws two inferences affecting high dynamics and low signal-to-noise ratio (SNR) carrier tracking from two aspects of state equation and measurement equation. Thus, the optimal algorithm using unscented Kalman filter (UKF) is proposed by the inferences mentioned. at the end, simulation results demonstrate the combined strong tracking algorithm has advantages in case of high dynamic and low SNR.
The Definition, Equation and Application of the Varied Water Temperature Heat
Authors: Yang Dongfang , Zhu Sixi , Fan Bailing , Su Chunhua , Yang Xiuqin 
Published: November 2019

Abstract
Based on water exchange, the horizontal and vertical variation of water temperature heat were proposed by the author, and their definitions and equations were determined in this paper. According to the water temperature of Jiaozhou Bay in May, August and October of 1979, the horizontal and vertical variation of water temperature heat at surface and bottom were calculated. Besides, the corresponding diagrams were obtained. The horizontal variation showed that in May, August and October, from inside waters to bay mouth, then to outside waters, the horizontal decrease amount of water temperature heat reached 0.05-0.82% at surface and 0.00-7.62% at bottom, less than 1.00%. Even in the hottest season, it was less than 12.00%. Hence, spatially and temporally, when waters exchanged at surface and bottom, the heat loss was low. In this way, the heat could be transported for long distance. The vertical variation showed that in inside waters, the vertical decrease amount at surface and bottom reached 13.27% in summer, but 2.47-3.45% in spring and autumn. Whereas, in bay mouth, it reached 13.59% in summer and 1.66% in spring. It became vertical increase amount of 0.05% in autumn. In outside waters, from spring to summer, further to autumn, the vertical decrease amount decreased from 9.91% to 6.32%, further to 0.00%, respectively.
High precision 3D measurement method of pipeline on complex working conditions research
Authors: Lu Wei , Liu Xiang 
Published: November 2019

Abstract
The research object of this paper is high-precision 3D structure measurement of thin pipe workpiece with working temperature ranged from -50 °C to +70 °C and pipe diameter range from 20 mm to 100 mm. Measurement method is based on the principle of circular structure light vision detection. Due to the strict temperature environment requirement and limited measurement space of the inner surface of pipeline. A CMOS camera module based on customized optical lens is designed. Matched with camera temperature compensation device. Motion guide rail of telescopic arm is equipped with high precision servo motor and grating ruler are used for accurate measurement. Experimental results show that the measurement system meets the design requirements of accuracy ⩽ 0.02 mm, repeatability ⩽ 5% FS (0.5 mm), and strain test error ⩽ 5%.
Research on Improving Artillery Firing Accuracy by Using Meteorological Data along Ballistic Trajectory for Artillery Firing
Authors: Zhang Zhiyuan , Liu Yuwen , Li Jun , Jiang Ming 
Published: November 2019

Abstract
In traditional artillery shooting, meteorological information is provided by meteorological unit, but because of the inconsistency between meteorological observation sites and shooting sites, there are errors in meteorological data, which affects shooting accuracy. In order to reduce the influence of meteorological data errors on firing accuracy, it is proposed to acquire multi-meteorological data along the ballistic trajectory by using the dropsonde carried by the UAV, and calculate the meteorological data along the ballistic trajectory for artillery firing. Through simulation calculation, using meteorological data along the ballistic for artillery firing can effectively improve firing accuracy.
Study on the Impact of Altitude on the Hitting Accuracy of Laser Terminal Guided Projectile and Its Improvement
Authors: Liu Yuwen , Jiang Ming , Zhang Zhiyuan , Duan Yanan 
Published: November 2019

Abstract
Aiming at the phenomenon of low firing accuracy and low hit probability of guided projectiles in Plateau area, based on the differential equation of kinematics of guided projectiles, the variation and regularity of hit range at different altitudes are simulated and calculated. The measures to improve hitting accuracy are proposed and simulated.
Numerical analysis of three θ methods for neutral stochastic delay differential equations
Authors: Li Xiuping , Hong Huifen 
Published: November 2019

Abstract
This article focus on the numerical analysis of stochastic θ-method, split-step θ method and one-leg θ method for neutral stochastic differential equations with time lag. When some stability conditions are met, the three θ methods turned out to be mean-square stable asymptomatically. From the numerical analysis, we can see that the asymptomatically mean-square stability for both linear and nonlinear stochastic differential equations depends on the step size h and parameter θ, which numerical analysis are based on stochastic θ-method, split-step θ method and one-leg θ method.
Numerical study on Vectoring the primary flows with dilator using microjet actuators
Authors: Gao Feng , Zhang Qian , Chen Fengli , Zhang Chengtao 
Published: November 2019

Abstract
The synthetic flow field of Vectoring control of a primary flows with dilator using microjet actuators was Numerical studied by the overall flow field calculation model-X-L model. The result shows that the primary flows with dilator deflected larger than no one. And the angle of dilator has an optimal value. The reason of primary flows deflected was analyzed. There are three stage sections that the “low pressure closed reticular flow region” results in non-equilibrium of pressure along the primary jet’s orifice; the microjet roll sucked and the primary flow coupled in each other in the near catchment area; the microjet and the primary flow coupled in each other in the far catchment area.
Quantum Entanglement Criterion for Rank of Block Matrix Vector Group Based on Density Matrix
Authors: Liu Guangrong 
Published: November 2019

Abstract
The determination of quantum state separability is the basic problem of quantum entanglement theory. By judging the rank of the matrix vector group formed by the density matrix block, the necessary and sufficient conditions for the separation of quantum pure States are given, and the necessary conditions for the separation of quantum mixed States are given, too. In the composite system 2 × 2, the rank of the vector group corresponding to the divisible pure state is 1, and the rank corresponding to the entangled state is 4.
Numerical simulation method for vibration response of blasting excavation of deep-buried rock mass
Authors: Xiaorui Xiang , Liang WU , Tianci LI , Jiayi HU , Yang Chen 
Published: November 2019

Abstract
In order to solve the safety problems caused by in-situ stress unloading and blasting impact in blasting excavation of deep-buried rock mass, the initial stress field and dynamic response of excavation unloading of deep-buried rock mass are calculated by ANSYS implicit and explicit solver. The results show that the stress wave induced by in-situ stress unloading diffracts at the foot of the wall and produces stress wave superposition in the surrounding rock above the wall. The vibration of surrounding rock caused by excavation of buried rock mass consists of blasting shock and ground stress unloading. With the increase of excavation depth, the vibration of surrounding rock caused by ground stress unloading exceeds blasting effect and gradually dominates the measured vibration.
Study of the classroom arrangement problem based on ant colony algorithm
Authors: Xiong Ziqi , Wang Bei , Geng Yuejie , Zhang Zhigang 
Published: November 2019

Abstract
In this paper, the ant colony algorithm is presented to optimize the university classroom arrangement and solve the corridor congestion problem. Firstly, the classroom capacity, the course time periods and the distance between classrooms are considered, and then the ant colony algorithm is applied to the corridor congestion problem by minimizing the distance between the students’ classroom of the courses. The experimental results show that the ant colony algorithm is able to construct feasible solutions and solve the classroom arrangement problem.