bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimum Selection of Structure Form and Materials for Highway Tunnel Insulation Layers
Authors: Li Borong , Han Changling , Fu Zhipeng 
Published: October 2020

Abstract
At present, the design of tunnel insulation layer in cold area mostly depends on engineering analogy, and the rationality of the design cannot be guaranteed. Therefore, in this study, on the basis of an ANSYS finite element analysis model, boundary conditions and calculation parameters are determined for the Jiangluling Tunnel in the cold region of Tibet, China. An analysis of the different laying methods of the thermal insulation layer between the permafrost section and the non-permafrost section is conducted, along with a comprehensive evaluation of several commonly used thermal insulation materials. Based on the results, the double layering method is recommended for the thermal insulation layer of the permafrost section. The commencement of the freeze–thaw cycle can be delayed by laying the insulation layer in the non-frozen soil section, and laying outside the wall is usually preferred. When the off-wall laying is not possible, the surface laying method is preferred.
Numerical Simulation and Test of filter Resistance of vehicle Wood Fiber Air filter
Authors: Liu Hong yu , Ni Yan shu 
Published: October 2020

Abstract
In order to increase the filter area of vehicle wood fiber air filter, improve the filtration efficiency of air filter, and reduce the filtration resistance of air filter, a kind of W-shaped wood fiber air filter is designed in this paper. Through the existing empirical formulas, it is found that the main factors affecting the filtration resistance are fiber filling ratio, Reynolds number Re and fiber arrangement. In this paper, the filter resistance of air filter is simulated based on Boltzmann method. Firstly, the change curve of filter resistance with filling rate and Reynolds number under parallel arrangement and staggered arrangement is studied, and compared with the existing theoretical formula. Then, by analyzing the fiber equivalent radius, filling rate and filter element thickness of filter resistance, the relationship curve between filter resistance and various influencing factors is obtained. Finally, the theoretical results are verified by using the self-developed filter performance test rig. The results show that the experimental results are in good agreement with the numerical simulation results. The filtration resistance does not change much at low Reynolds number, mainly decreases with the increase of the equivalent radius of the fiber, and increases with the increase of the filling ratio. With the increase of filter thickness, these results provide theoretical basis and suggestions for the structure optimization of air filter.
Study on the performance of new TPS high viscosity modifier on its modified asphalt
Authors: Zhang Yiluo , Cheng Yinglun , Dong Xuechao , Li Ning 
Published: October 2020

Abstract
In order to study the effect of a new TPS high viscosity modifier on the performance of its modified asphalt, a new type of TPS high viscosity modified asphalt with 3%, 8%, 13% and 18% content will be prepared, SBS modified asphalt and Japanese TPS modified asphalt were selected for comparison, high temperature and low temperature indexes were tested respectively, and the modification effect of the new TPS high viscosity modifier was verified through comparative analysis, and the more suitable dosage was determined. The results show that with the increase of the new TPS content, the performance of asphalt has been improved. When the content of the new TPS reaches 13%, the indicators of high-viscosity asphalt have fully met the requirements of the specification; By comparing the performance of each high-viscosity asphalt, and combining the requirements of high-viscosity asphalt and Japanese TPS. For the comparison between high-viscosity modifiers, the recommended dosage of this new TPS is between 13% and 18%.
Research on Aircraft/Engine Integrated Method of Civil Aircraft Products Development Oriented to System Engineering
Authors: Jinhai Yu , Jilei Fu , Yi Lu , Shan Fu , Dan Huang , Xin-Ai Zhang 
Published: October 2020

Abstract
This research proposes an aircraft/engine integrated design system construction method for civil aircraft based on system engineering oriented to large civil aircraft airworthiness certification. The aircraft/engine integrated design system of civil aircraft based on the “mapping model” highlights the logical completeness of the development evidence. This research contains two types of core design evidence: 1) design data of aircraft/engine integrated system; 2) aircraft/engine integrated system confirming and verifying data. The mapping model corresponds to the constraints of airworthiness regulations on the aircraft/engine integrated system design in three aspects: requirements analysis and confirmation, functional design, and design execution and verification, which promotes design data and airworthiness compliance evidence build in parallel.
Study on the Direct Operation Cost model of primary training aircraft
Authors: Yu Wang , Jun Lin , Zhi Deng , Tong Che 
Published: October 2020

Abstract
Which type of flight training aircraft the flight training school introduces depends largely on the direct operation cost (DOC) of the aircraft in the flight training. This paper divides DOC into two categories, namely fixed cost and variable cost. Then it constructed the calculating model for each cost item. The language of Java was used to achieve visual interface for the flight training aircraft. These above findings as well as the developed tool are expected to raise the evaluation accuracy in introducing the type of flight training aircraft for the flight training school.
The Demand of Specific Power for Trucks Operation Safety on The Uphill Section of Expressway
Authors: Guo Cheng , Xin Xiong , Ting Shang , Li Yin , Jie Tang 
Published: October 2020

Abstract
In this paper, the vehicle dynamics simulation software Trucksim was used to build road models and truck models to test the driving speed and climbing distance of 6-axis trucks under different conditions. By comparing with the correlation of the maximum slope length in the “Road Route Design Specification” (JTG D20-2017), we determine the demand of specific power for trucks on expressways with different design speeds. The results show that the initial speed, specific power and slope of the road affect the maximum slope length of the vehicle. The maximum slope length increases with the increase of the initial speed and the specific power of the vehicle and it decreases with the degree of longitudinal slope increases. The Demand of Specific power for trucks on China’s expressways increase with the decrease in design speed, which is 7.0kW/t (120km/h), 8.0kW/t (100km/h), and 9.0kW/t (80km/h) respectively.
Research on Traction Load Characteristics of Sichuan-Tibet Railway Under Different Weather
Authors: Wang Qi , Jia Junyi , Ye Jingjing 
Published: October 2020

Abstract
The Sichuan-Tibet Railway faces severe challenges such as changeable weather and long ramps. In order to reduce the ramp stop accidents of locomotive, the traction characteristic curve and braking characteristic curve of the locomotive are revised considering the wheel-rail adhesion limit under different weather conditions. Then the traction quality of dry rail, wet rail and ice rail is given. The modified characteristic curves and traction quality are used to simulate the traction load of Sichuan-Tibet Railway under different rail surface conditions. The results show that under dry rail conditions, the traction quality is 2500 tons and the driving power and regenerative braking power are extremely large, respectively 20MW and 16MW. Under wet rail and ice rail conditions, traction quality and regenerative braking power are significantly limited by adhesion. When ice rail, the traction quality is only 1200 tons; the driving power and the regenerative braking power are only respectively 14MW and 9 MW. At the same time, the running interval when growing uphill is 7 minutes longer than that under dry rail conditions. It provides a reference for the layout of the train operation diagrams and the design of the traction power supply system.
Study on the Temporal and Spatial Distribution Characteristics of Aquatic Traffic Accidents
Authors: Wang Fangping , Wang Lin , Zhixian He 
Published: October 2020

Abstract
The study of the characteristic of aquatic traffic accidents is significant for avoiding accidents effectively and guiding the supervision of water traffic safety and the search and rescue of water accidents. In this paper, the temporal and spatial characteristics of aquatic accidents from the aspects of accident occurrence and accident consequences were studied. The results indicated that the total number of verified distress incidents has significant temporal and spatial distribution characteristics; the number of verified distress incidents in coastal areas is significantly higher than that of inland rivers; the main causes of water accidents include collisions, stranding, fires and windstorm, all of which have a significant temporal distribution. In terms of accident consequences, the number of general danger is significantly higher than that of other levels of risk, and there is a significant temporal distribution characteristics on four danger levels. The main types of ships in distress are transporting ships, agricultural vessels, fishing boats and official ships. The number of transporting ships and fishing boats both fluctuated greatly in some months; there was no difference on the temporal distribution for the number of agricultural vessels and official ships in a year. There is no significant linear relationship between the number of distressed people and ships; the number of people in distress on the four types of ships all showed a certain time distribution characteristics; the number of deaths and disappearances in the main rivers rose sharply in June. By analyzing the temporal and spatial distribution characteristics of accidents and their consequences, this paper provides a basis for the relevant authorities to optimize the prevention and control of water accidents, the layout of water search and rescue forces and the timeliness of target searches.
Identifying key component in high-speed train based on complex network
Authors: Wang Baojin , Wang Yanhui , Hao Yucheng 
Published: October 2020

AbstractThe identification of key components is very important for the real-life system. Because the complex network is a powerful tool to analyze the behavior of the complex network, we explore the key nodes by using the complex networks. First, we utilize the degree, the betweenness, the closeness centrality, the eigenvector centrality and the Pagerank to reflect the importance of the node. Then the machine components are abstracted as a node, and the interactions are abstracted as an edge. According to the topology structure of the high-speed train, it is found that the high-speed train has the scale-free feature. By removing the nodes in the light of the sequence of nodes, we can obtain the effective measure and analyze the key nodes of the high-speed train performance degradation caused by the failure. The simulation results show that the node with the high PageRank value and degree is critical for the network. This work may contribute to the discovery of the key components in the high-speed train.
Research and Application of Cross Spatial Grid Method in Combined Box Girder Bridge with Corrugated Steel Webs
Authors: Jinbiao Zhang , Wei Zhang , Pengfei Wang 
Published: October 2020

Abstract
In order to further study the application of corrugated steel web composite box girder bridge in practical engineering, this paper selects a corrugated steel web box girder bridge with transverse diaphragms as the theoretical model, and uses the cross space grid method to simulate The model. Beam188 is the element type selected for this ANSYS modeling. The longitudinal element of the web is equivalent to a flat plate according to the plate and shell theory. The shape of the vertical element remains unchanged. Under the condition of its own weight, the natural frequency and deflection of the model are compared. The research results show that when the web is divided into whole and separated, the errors of the first-order natural frequencies of the two spatial mesh models and the solid finite element model are both within 10%, and the accuracy of the overall division is higher.
Numerical Study on Movement of Iron Concentrate in a Cargo Hold Based on Discrete Element Method
Authors: Zhanwei Wang , Jianwei Zhang , Wenfeng Wu , Jinshu Lu 
Published: October 2020

Abstract
Taking the cargo hold from a 57000 DWT bulk carrier as an example, the movement of iron concentrate particles in the cargo hold was simulated by using the discrete element software EDEM. The effect of water content on the movement of the cargo is replaced by variation of the particle’s friction coefficient. Considering the friction coefficient, particle size grading, particle collision recovery coefficient, rolling amplitude of cargo hold and cargo loading depth, 11 working conditions were designed and simulated. Results show that the decrease of friction coefficient, the increase of rolling amplitude and the loading capacity would aggravate the overall shift of the center of gravity of the cargos. In the case of the same loading depth, the more particles, the stronger the particle collision. And the collision recovery coefficient has little effect on the movement of particles.
Optimization of Transfer Layout and Organization on Urban Rail Transit —— A Case Study on Split Scheme of Beijing Rail Transit Line 13
Authors: Zhou Cong , Chen Junhua 
Published: October 2020

Abstract
Based on the practical case “the Consultation on Split Scheme of Beijing Rail Transit Line 13”, this paper collects and forecasts the passenger flow information, to combine the situation of the line with the surrounding land use, to probe into those possible problems of the existing split scheme deeply. By adopting digital construction technology, three sets of transfer layout optimization schemes are studied and designed, in order to realize the seamless connection between 13A Line and 13B Line after split. Then, this paper is supposed to establish the index evaluation system, and the satisfactory optimization scheme is obtained by the comprehensive comparison and selection from the aspects of convenience for passengers, feasibility of scheme implementation and so on. AnyLogic software is used to build a simulation model of human-vehicle interaction, which realizes the effect display and dynamic index acquisition. And the optimization effect is analyzed from the perspective of transfer platform security.
Optimal shipping schedule for a near-sea liner service route with time windows
Authors: Jiang Xi 
Published: October 2020

Abstract
This paper proposes a shipping schedule design problem arising in near-sea liner shipping that aims to determine containership deployment plan, the arrival time at each port of call, and sailing speed for a given liner service route with hard time windows. The problem is transformed into a mixed integer nonlinear nonconvex optimization model, and further transformed into a mixed integer linear optimization model, which can be effectively solved by commercial solvers. The case studies based on a real-life service route show the effectiveness and efficiency of the proposed solution method. Results also demonstrate that the port time windows affect the total cost of a ship route, the optimal number of ships to deploy, and the optimal schedule.
Ontology modeling and case database construction of subway emergency plan knowledge
Authors: Hongliang Li , Zhenhai Zhang 
Published: October 2020

Abstract
In order to improve the effectiveness and timeliness of the subway emergency plan knowledge, it is necessary to standardize and semantically express the emergency plan knowledge and promote the emergency response work to play a more efficient and timely role. Firstly, an ontology-based emergency planning knowledge modeling is proposed, and a unified and standardized metrology database for the emergency planning ontology is constructed. Secondly, drawing on the case reasoning method MyCBR, combined with the established subway operation accident case knowledge base, a case retrieval method based on semantic similarity is proposed to achieve efficient retrieval of subway emergency accident cases. Finally, Protégé software and MyCBR are used to realize the emergency reasoning knowledge reasoning and case retrieval function, which significantly improves the application efficiency of emergency response knowledge.
Application of Fatigue Simulation Analysis Based on CDTire
Authors: Tang Yan , Xiaobing Bu , Fengling Gao , Bayi Yu , Dongliang Geng , Yuan Wu 
Published: October 2020

Abstract
In order to verify the fatigue-durability performance of chassis components, the simulation and analysis process is established in this paper based on CDTire model. High-accuracy tire model is constructed by CDTire modeling software according to the tire test data. The multi-body dynamics simulation is completed by combining the CDTire model with the vehicle model. The load of chassis components is extracted and imported into fatigue software. The swing arm is taken as an example for calculation. This analysis process can guide the analysis of chassis components and shorten the development cycle.
An Integrated Optimization Approach of p-Hub Median Problem and Service Facility Configuration
Authors: Yu Wang , Shilin Yan , Tong Che , Tong Chen 
Published: October 2020

Abstract
Traditional network design approach neglected the impact of network-wide location of service facility configuration on hub network designing scheme. In order to improve the mutual adaptability between hub network scheme and service facility configuration, the selections including the location of hubs, the itinerary of OD pairs and the allocation of both types and number of service facilities on each link were considered as the decision variables. The limitations of the maximum expected number of service facilities deploying on each link and the total service time of each facility type were treated as constraints. Then an integrated mathematical model of p-hub median problem and service facility configuration was constructed. A numeric example with the scale of 9 cities, 4 types of aircraft and 72 OD pairs in domestic airline industry in 2016 is used to verify the feasibility. The results indicate that the approach can decrease the hub network designing cost by 1.34% and the adaptability of hub network scheme to service facility configuration is significantly raised as compared to the traditional approach.
Analysis of the influence of high-speed railway on economic development
Authors: He Shan , Xu Yuping , Jiang Ruizhi 
Published: October 2020

Abstract
This paper selects the data of 12 years of operation of China’s high-speed railways for empirical analysis. It constructs a VAR model between high-speed railway construction and economic development, and introduces two intermediate variables that make railway transportation capacity and human capital. Through the Johansen cointegration relationship test and Granger causality test, this paper can find that there is a long-term equilibrium relationship between high-speed railway construction and economic development. The construction of high-speed railways promotes economic development through the transmission multiplier effect. Finally, forecast the operating mileage of high-speed railways in the next three years. And then put forward corresponding suggestions for the current interactive relationship between high-speed railway and economic development‥
Analysis on the Trends and Characteristics of Automobile Recalls in China
Authors: Feng Yongqin , Li Wenzhao , Zhang Xiaorui , Liu Le 
Published: October 2020

Abstract
Based on the statistical data provided by the State Administration for Market Regulation, China Automobile Industry Association and China Consumers’ Association, this study analyzes the trends and characteristics of automobile recalls in China from 2008 to 2017. Studies have shown that automobile recalls in China have become a normal trend, there is a recall almost every two days and most recalls are initiated by a few automobile manufacturers. The recall of auto brands such as Volkswagen and Honda usually occur in the first 5 years of the model year. This shows that consumers should pay more attention to the after-sales and maintenance services in this period when buying a car.
Research on Urban Road Traffic Noise Control
Authors: Fang Bo , Chen Li Chun , Xu He , Cai Jie , Li Dong 
Published: October 2020

Abstract
At present, with the steady acceleration of infrastructure construction in the western region and the continuous growth of the urban economy, people’s living standards have been greatly improved, which has driven the development of urban transportation. With the increasing saturation of urban traffic, the problem of noise pollution is becoming more and more prominent. This article takes the Chengdu area as an example. Due to the rapid development of urban construction, the newly built and expanded urban roads pro mote the transformation from remote areas to prosperous and noisy areas. This change has caused serious traffic noise pollution to the surrounding environment to a certain extent. The noise pollution of urban arterial roads has caused a lot of disturbance to urban residents. Therefore, the study attempts to formulate corresponding treatment methods by analyzing the current situation of Chengdu’s road traffic noise and combining with the specific conditions of the region, in order to provide theoretical support for the same type of urban noise treatment.
The Analysis of Socioeconomic Adaptability of China’ s Civil Aviation Development
Authors: He Hang , Han Zhu , He Xiao , Wang Shuai 
Published: October 2020

Abstract
“Transportation service is convenient, comfortable, economical and efficient” is one of the purposes of “ The Program of Building National Strength in Transportation”. The high-capacity and high-efficiency fast passenger and freight services provided by the aviation industry meet this need. Civil aviation industry is not only a social service industry, but also an industry closely related to the economic situation. At present, there is a lack of research on the evaluation of socioeconomic adaptability of civil aviation development. From aspects of civil aviation development and economy and society, this paper constructs the index system of socioeconomic adaptability of civil aviation development. And then in this paper, the method of DEA is used to evaluate its adaptability, and the year with better adaptability is found. At the same time, this paper also briefly analyzes the fluctuation of civil aviation passenger transport market, which lays a theoretical foundation for the subsequent development planning of civil aviation, and promotes the high-quality development of civil aviation to a certain extent. And it will achieve the goal of “people’s aviation for the people”, and then promote the process of building a powerful transportation country.