bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Parking Lot Selection Model Taking Secondary Parking into Account
Authors: Yu Chengqiang 
Published: December 2019

Abstract
Parking difficulty is a common problem in a lot of cities. People often find that there is no space in the selected parking lot so they have to look for another parking lot, which makes the parking efficiency very low. In this paper, by introducing the concept of time value, a calculation method of secondary parking cost is proposed, considering the factors affecting parking saturation, and combining BP neural network to predict parking space. Then, an optimal parking selection model with minimum generalized parking cost is built, which is applied to the calculation of optimal parking choice in Fuzhou central business district. The parking lot selection model which is built in this paper will improve the parking success probability of the selected parking lot, reduce the blindness of parking lot selection, the secondary parking flow rate and the heavy traffic in the city.
Design and Simulation of Urban Variable-route Bus
Authors: Liu Lihua , Li Junzhuo , Li Aizeng , Zhao Jianfeng , Chen Jianping , Luo Shushuo 
Published: December 2019

Abstract
As a new mode of public transport service, variable-route bus service can further improve the service quality of urban public transit system, and will become an important part of integrated urban comprehensive public transit system. Therefore, this paper studies the operation scheduling model of variable-route bus, aiming at improving the service level of public transport and reducing the operating cost. Based on the theoretical research, the service area maximum width of variable-route bus is obtained according to the relationship between the system slack time and the travel time. Then a two-stage vehicle scheduling model which comprehensively considers the reservation demand and the dynamic real-time demand is proposed. The operation mode conversion model of variable-route bus and the conventional bus are further established, which provides powerful guarantee for the application of variable-route bus service. Finally, by designing simulation experiment, the comparison of relevant operation service parameters between variable-route bus and conventional bus is conducted. This paper aims to study the influence of variable-route bus to operation and scheduling, and provides a theoretical basis for the promotion and application of variable-route bus in China.
Analysis of the problems in China’s railway freight pricing system
Authors: Li Lutian , Guo Jingwei 
Published: December 2019

Abstract
The fundamental changes in China’s market structure have ushered in the development opportunity for the cargo transport market and prompted fierce market competition. In this economic environment, the perfection of railway freight pricing system directly affects the market competitiveness. Through sorting out the change course of China’s railway freight pricing management mechanism, this paper analyzes the current situation of freight pricing management mechanism, expounds the freight pricing system. On this basis, the problems of the pricing system are explored, which provides theoretical basis and technical support for improving the railway freight pricing system and deepening the reform of the freight rate mechanism.
Analysis and Evaluation of High Quality Development Status of Beijing Transportation
Authors: Wang Ying 
Published: December 2019

Abstract
China is realizing the leap of a big transportation country to a powerful transportation country, and promoting high-quality development is a fundamental requirement for transportation work in the future. This paper elaborates on the high-quality connotation of transportation, and measures the high-quality development index of transportation in Beijing from 2014 to 2018 by constructing a high-quality development evaluation index system. The results show that the high-quality development level of Beijing’s transportation has been increasing year by year, but the overall condition is not so good. At the same time of focusing on quantity, it has begun to work towards quality. In the future, Beijing’s transportation development should continue to be tilted towards high efficiency and green.
Research on Promoting Strategies of Urban Comprehensive Transportation Planning under the Background of Multiple Plans Integration
Authors: Zhong Guo , Yin Yixiao , Wei Linghong 
Published: December 2019

Abstract
In order to solve the problems of self-contained system, content conflict and lack of cohesion in various kinds of spatial planning, China has carried out Multiple Plans Integration works. As one of the important contents of spatial planning, how to seize the opportunity to play a greater role in the Multiple Plans Integration system is also necessary to study the key points and methods of transportation planning under the new situation. On the basis of understanding the connotation of Multiple Plans Integration, this paper puts forward the key problems to be solved in comprehensive transportation planning. On this basis, it puts forward some policy suggestions on top-level design, transportation model, performance evaluation and implementation mechanism of comprehensive transportation planning under the situation of Multiple Plans Integration, which can provide reference for the development of China’s transportation planning in the direction of Multiple Plans Integration.
Workbench Control System Design Based on Mecanum Wheel
Authors: Bai Ruoqi 
Published: December 2019

Abstract
The Mecanum wheel gains the particular interests in the field of robot, vehicle and workbench due to the capabilities of moving toward, sideway, rotation and combination of other motion pattern. This report details the progress of designing and building an omni-wheel robot control system which is controlled by Programmable Logic Controller (PLC) to achieve the ability of instantaneous motion in any direction with 4 coupled Mecanum wheels involved. A simulative control program has been developed to fulfill the function of line motion. Additionally, several advanced control methods have been reviewed, such as FPGA, NLP and TLC, which can be helpful in the future modification and improvement.
Study on Simulation Analysis of Vehicle Handling Stability Based on MATLAB
Authors: Cao Fengping , Wang Jinduo 
Published: December 2019

Abstract
Vehicle handling stability is an important performance index of vehicle, which directly affects the safety performance of vehicle. Driving speed, tire lateral stiffness, center of mass position, front wheel Angle are important factors affecting vehicle handling stability. This paper analyzes the influence of these four factors on the vehicle handling stability, draws the corresponding curve with Matlab software, and simulates the vehicle handling stability. This study provides a research method for analyzing the influence of driving speed, tire lateral stiffness, center of mass position and front wheel Angle on vehicle maneuvering stability.
Research and Optimization of Vehicle Handling Stability Based on Multi - body Dynamics
Authors: Chen Yajuan , You Fei , Li Xianglin , Fu Lei 
Published: December 2019

Abstract
Based on multi-body dynamics virtual simulation method, the vehicle simulation model is built and the transient response characteristics of the vehicle are analysed under the steering angle step input. According to the results, the improving method is given. The optimization and stiffness test of tuning bushing are carried out, and the better bushing stiffness is obtained. The vehicle steering transient response performance improvement effect is obvious. This method provides theoretical reference for structural engineers.
Research on Community Distribution Model Based on Structural Equation Model
Authors: Cong Danyang 
Published: December 2019

Abstract
Due to the increasing demand, community logistics has drawn the attention of the industry. Studying the community distribution model can not only reduce logistics costs, but also reduce resource consumption. Based on the structural equation model, this paper effectively combines the planned behavior theory model with the normative activation theory model, and joins the enterprise cost factor to construct a community distribution model, and effectively improves the customer satisfaction.
Analysis of Urban Traffic Engineering Planning Based on Travel Well-being
Authors: Jia Siqi 
Published: December 2019

Abstract
Traffic engineering system is one of the most important infrastructure in urban. The built environment and operation impact everyday life in urban. In order to build modern integrated transportation system of “One Belt and One Road”, travel well-being should be taken into consideration. Ordered logit models were built in this paper to find the pain points of traffic engineering design. Some recommendations were offered to improve the whole quality and efficiency of transportation system.
The design of AGV’s dynamic wireless power transmission power supply based on Adaptive Weight Value Multi-objective Genetic Algorithm
Authors: Ning Pingfan , Li Tiantong , Niu Pingjuan 
Published: December 2019

Abstract
AGV is the application of modern factory intelligence and automation. With the development of wireless power transmission (WPT), its transmission efficiency and stability are getting higher and higher. However, from static charging to dynamic power supply, the cost of technology implementation has increased significantly. This paper proposed a method to supply power to logistics AGV by intermittent segment, established the binary coverage model according to the power coverage distance, and designed an Adaptive Weight Value Multi-objective Genetic Algorithm (AWVMOGA) for this model to Optimizing the path design of sectional power supply. The influence of three weight value adaptive methods on the optimization results is analyzed, the effectiveness of the proposed method is analyzed and verified through case simulation.
Experimental Study on Shear Behavior of Expansive Soil Modified by Gravel Sand
Authors: Yang Lu , Deng Xiufu 
Published: December 2019

Abstract
Using the strain-controlled direct shear equipment, some direct shear experiments were carried out on the soil samples of Nanyang expansive soil with different gravel ratios under the specific water content, and the shear strength, cohesion and internal friction angle of the expansive soil samples were studied. The experimental results show that the shear strength of the expansive soil samples increases with the increase of vertical pressure. As the proportion of gravel sand increases, the shear strength of expansive soil samples increases to varying degrees. The shear strength of expansive soil increases significantly when the proportion of gravel sand is in the range of 10%~40%, and the shear strength of remolded soil is the highest when the gravel sand content is 10% under the lower vertical pressure. Under the higher vertical pressure, the shear strength of the remolded soil is the largest when the gravel content is 20%, and the shear strength of expansive soil is close to that of pure expansive soil when the proportion of gravel sand is 50%. The cohesive force of the sample increases first and then decreases sharply with the increase of the proportion of gravel sand, and is maximum when the content of gravel sand is 10%. The internal friction angle increases first and then decreases slowly with the increase of the proportion of gravel sand, and is maximum when the gravel sand content is 40%. The results show that gravel sand can effectively enhance the shear strength index of expansive soil, which can be used as a good engineering application material for improving expansive soil.
A novel deep recurrent neural network for Short-term travel demand forecasting under on-demand ride services
Authors: Wei Wang , Yan Xuedong 
Published: December 2019

Abstract
Short-term travel demand forecasting throughout a city is crucial for passengers, drivers and the on-demand ride service platform, which could reduce waiting time and fuel consumption. In this paper, we propose a novel stacked bidirectional long short-term memory neural network (SBi-LSTMs) that can forecast short-term travel demand in each area of a city based on historical demand data and other relevant information. The proposed model is evaluated on the real-world data provided by China’s largest on-demand ride platform (DiDi Chuxing). The experimental results show that the SBi-LSTM outperforms other benchmark algorithms in predicting large-scale travel demand, such as ANN, RNN and LSTM. In addition, we analyzed the effects of different parameters on performance and training time.
Design of High Efficiency Single-Phase Bridge Passive Inverter Based on SG3525
Authors: Zhu Zhen , Wang Renda , Yin Yong , Xing Shengwei 
Published: December 2019

Abstract
In this work, a method for simultaneously improving the conversion efficiency and power quality of marine distributed generation was proposed. Aiming at the insufficient correction of output waveform based on inverter technology, a model of improved inverter conversion system was built. For the limitation of external power grid pollution treatment, the self-regulation ability of the output voltage waveform was improved by adding high-performance real-time feedback technology and PI regulation. The test results showed that the proposed method had the advantages of stable output, high precision, good power quality, and superior to the traditional method of indiscriminate feedback regulation in terms of power conversion efficiency.
Study on Effects of FDM 3D Printing Parameters on Mechanical Properties of Polylactic Acid
Authors: Yu Zhu , Gao Yingchao , Jiang Jie , Gu Hai , Lv Shuaishuai , Ni Hongjun , Wang Xingxing , Jia Chaofan 
Published: December 2019

Abstract
In view of the existing problems of complexity of process parameters and the difficulty in determining the optimal process in the field of 3D printing, polylactic acid (PLA) samples were prepared by fused deposition modeling (FDM). Orthogonal experiments were designed with 3D printing parameters (layer height, filling density and printing speed) as factors. The effects of layer height, filling density and printing speed on the tensile and compressive properties of PLA were studied. When layer height is 0.15 mm, the filling density is 100%, and the printing speed is 30 mm/s, the sample has the best comprehensive mechanical properties.
Analysis of creeping mechanism and eliminating measures of creeping phenomenon of machine feeding system
Authors: Yu Chuanliang , Liang Ruijun , Li Wei , Song Dan 
Published: December 2019

Abstract
When the machine tool feeding system is running at low speed, the creeping phenomenon of the system will occur, which seriously affects the machining accuracy of the machine tool and the surface quality of the parts. In this paper, the mechanism behind the creeping phenomenon generated by the machine tool is theoretically analyzed. The dynamics and mathematical model are established, and the critical equation for generating the creeping phenomenon is solved based on the dynamics and mathematical model which we established. The influence of various factors on the creeping phenomenon is obtained by the equation analysis. Some measures to eliminate creeping phenomenon are presented.
Research on Polar-region Coarse Alignment Algorithm Based on Grid System
Authors: Tian Ming 
Published: December 2019

Abstract
Due to the convergence of meridians in polar regions, the geography-based northern-azimuth mechanics arrangement has problems such as increase of error and computational overflow in polar navigation, and the traditional compass alignment scheme is unable to operate normally. In this paper, the problem in polar navigation is solved by using the mechanics arrangement scheme, and a simulated analysis has been carried out on the application of compass alignment in high latitudes through static data, which verifies that it is unable to operate normally at the pole. Then compass alignment has been replaced by anti-sloshing coarse alignment and a simulated verification has been conducted on its correctness. After that, the latitude increment method is used to convert the sports car data at low-latitude regions to high-latitude regions and carry out a semi-physical simulation, which further verifies the correctness of the grid inertial navigation and the coarse alignment method in anti-sloshing polar region.
The Application of the Solid Waste Compost Products in Garden Plant Planting
Authors: Cai Xiaolong , Tan Jianyang , Chen Huaji , Huang Mingji , Huang Xinying 
Published: December 2019

Abstract
To solve the problem of solid waste pollution generated during the Ecological Rural Construction in China, the products obtained from composting were used for garden utilization on the premise of mixed compost product treatment of rotten garbage in rural areas. The results showed that the solid waste compost products had good biosafety and fertilizer efficiency in the growth of landscaping plants such as woody flowers, herbaceous flowers, turf plants and foliage plants. The experimental plants could not only survive in the soil containing compost products, but also grow well, significantly better than growing in the garden soil.
Optimization Design of Support Arm of an Upper Limb Rehabilitation Robot
Authors: Liu Hairui , Wang Yu 
Published: December 2019

Abstract
According to the structural design requirements of upper limb rehabilitation robot, the static analysis and harmonic response analysis are made in this paper. The structure of the upper limb rehabilitation robot is simplified in different ways according to the importance of each part of the structure. Selecting different element types and establishing finite element model Based on its analysis results, some unnecessary parts are removed and simplified, and the main forced parts are optimized by defining parameters to optimize and re-design the structure. The static analysis and harmonious response analysis of the modified model, comparing the structure before and after optimization, show that the modified structural mechanical properties are obviously improved and the design requirements are fully met.
Failure Mechanism and Prevention Research of Adhesive Wear in the Guide Part of Globe Valve
Authors: Chen Shaojiang , Zhang Qing , Sun Yilong , Gu Yufei 
Published: December 2019

Abstract
For the failure of a low-temperature globe valve, through disassembly and material analysis, the cause of the failure was initially determined to be caused by adhesive wear between the disc guide rod and the valve seat. From the three aspects of material detection, stress and adhesive wear, the failure mechanism of stainless steel motion pair was analyzed. Finally, the wear test was carried out for chrome plating and non-chromium plating. Tests showed that when the valve seat is chrome-plated, the surface hardness of the guide portion is increased, which could effectively prevent the adhesive wear failure of the guide rod and the valve seat guide hole.
Design of Armature Interference Structure of New Quadrupole Track Electromagnetic Launcher
Authors: Chen Qingrong , Shu Tao , Feng Gang , Liu Shaowei , Cui Mengyang 
Published: December 2019

Abstract
How to provide pre-tightening force for armature and how to achieve interference fit between armature and track are the basic and key difficult problems in the research process of electromagnetic track launcher, which directly affect the contact characteristics between armature and track, and have important research significance. Firstly, according to the armature arm structure of C-type armature of railgun, the interference structure of armature of new quadrupole track electromagnetic launcher is designed. Then, in the simulation process, two kinds of interference structures are simulated and analyzed by the loading assembly method. Finally, the final structure of armature interference is determined based on the four performance indicators of stress, pressure contact efficiency, stress and pressure distribution uniformity to quantify the contact characteristics. The results show that scheme 2 is more suitable for armature of new quadrupole track electromagnetic launcher, and has the best performance index when the interference is 0.6 mm.
Numerical Analysis of Nylon Projectile Engraving into Rifle
Authors: Dong Yucai , Sun Jing , Gong Liming , Wang Jianjun 
Published: December 2019

Abstract
The parametric model of projectile and rifled barrel is established by using finite element software ABAQUS. The numerical simulation of the projectile engraving into the bearing band under the maximum chamber pressure of 10 MPa and 15 MPa is carried out respectively. he force condition and morphological changes of projectile during extrusion at different times are analyzed and explained. The variation of velocity and displacement of projectile is obtained in the chamber, respectively. Simultaneously, the velocity and displacement components of rifled barrel and slippery barrel after muzzle exit are presented. It is verified that the rifling structure can effectively reduce the emission dispersion of the launching system under gravity free.
Three common preparation methods of hydroxyapatite
Authors: Ma Guoqing 
Published: December 2019

Abstract
Hydroxyapatite has good stability, biological activity and biocompatibility, the calcium ions can be a variety of metal ions by ion exchange reaction, form M apatite of the corresponding metal ions (M on behalf of metal ions that replace calcium). Hydroxyapatite also has a good ability of bone conduction, bio decomposition and bone formation induction, make it an excellent and nearly ideal repair and replacement material for human teeth and bones when damaged. However, due to its low strength, poor toughness, difficult to form, poor corrosion resistance, hydroxyapatite has not been widely used. Therefore, the preparation of hydroxyapatite with superior comprehensive properties and more ideal composite materials has become the focus of research in recent years. This article is written based on the research status of hydroxyapatite, summarizing the origin, development, preparation, application and development prospect of hydroxyapatite. Emphatically analyzing the advantages and disadvantages of three common methods, including hydrothermal method, solvothermal method and homogeneous precipitation method, the structure, size, properties and application of hydroxyapatite obtained using these methods are also discussed. Views on the future development prospect and research direction of hydroxyapatite are also put forward.
The Application of Artificial Intelligence in Mechanical Manufacture Industry
Authors: Wang Yubo 
Published: December 2019

Abstract
Artificial intelligence (AI) technology, as one of the most advanced science and technology in the current society, has been applied more and more widely to production and life, and especially in manufacture industry. This paper studies the application of artificial intelligence in mechanical manufacture industry. Firstly, it briefly introduces the definition and development of artificial intelligence and that of mechanical manufacture industry. Secondly, it analyzes the advantages of AI. Lastly, it illustrates how artificial intelligence technology is applied in mechanical manufacture mainly from the aspects of fault diagnosis, quality inspection, improving the safety of working places and other aspects as well.