Automobile transport最新文献

{"title":"Computer modeling and software research of car and engine parts","authors":"V. Kalchenko, A. Kolohoida, G. Pasov, N. Sira, V. Klimenko","doi":"10.30977/at.2219-8342.2023.52.0.02","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2023.52.0.02","url":null,"abstract":"Problem. The development of automotive technology for various purposes and the improvement of existing car models, requires a fast and flexible design process. Spatial models of details and nodes are the starting points for design, and the necessary design documentation is performed on their basis. When manufacturing parts on CNC machines, it is necessary to quickly obtain a control program that will increase the accuracy of the product by ensuring the optimal trajectory of the mutual movement of the part and the tool. Therefore, the creation of a comprehensive methodology for the design of car parts, their basic inspection and obtaining design documentation is an important technical task. Goal. The main goal of the work is to determine the rational sequence and basic principles of computer-aided design, research and manufacturing of car and engine parts, and the development of mathematical spatial models of surfaces in order to optimize control programs for CNC machines. Methodology. The approaches adopted in the work for solving the set goal are based on general design principles. The methods of conducting static and dynamic calculations, as well as spatial mathematical modeling of the processes of manufacturing parts were also used. Results. A comprehensive methodology for designing parts of engines and cars has been developed. The main principles of creating spatial models have been determined in order to achieve their flexibility and simple editing. Methods of automating the development of drawings and design documentation are described. The software options for the primary verification of static strength and frequency analysis are considered. A calculation program has been developed for constructing transient and amplitude-phase-frequency characteristics. The mathematical spatial modeling of typical surfaces of the camshaft is provided with the aim of further research and optimization of the development of a control program for processing on a CNC machine tool. Originality. The defined basic principles of designing parts of engines and cars provide an opportunity to create a flexible spatial model and more fully automate the process of drawing up technical documentation. The developed mathematical spatial models of the supporting and working surfaces of the camshaft make it possible to write a control program with the determination of the optimal trajectory of the mutual movement of the part and the tool. Practical value. The obtained results can be recommended when designing car parts and assemblies.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"341 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132339640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of the automated guided vehicle systems: dispatching systems and navigation concept","authors":"P. Siegfried, Rami Bourafa","doi":"10.30977/at.2219-8342.2023.52.0.09","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2023.52.0.09","url":null,"abstract":"Problem. As one of the three key elements of flexible manufacturing systems (FMS), automated guided vehicles (AGVs) play a significant role in material handling systems. They've been around for more than a decade, primarily in Europe. AGVs were formerly utilized mostly in production lines, but due to recent industrial development, they now play a vital role in a variety of different applications and domains, including warehouses, port facilities, transportation systems, and even the medical sector. Goal. The purpose of the work is to analyze two methods of AGV control and the paths that the AGV should follow during transport operations, taking into account safety and limitations for heavy loads that need to be transported in difficult conditions. Methodology. We attempted to provide a summary of the two existing AGV control methods, centralized and decentralized control offered by major manufacturers in this study. Almost all function in a centralized manner, with a single central controller controlling the whole fleet of AGVs. The author sees a tendency toward decentralized systems in which AGVs make individual decisions in favor of transportation flexibility, robustness, and adaptability. A brief explanation of well-known and mature navigation technologies used by AGVs in the industry is also provided, along with both physical and virtual paths to be followed by the AGV during transportation operations, since these technologies get to be a key issue given the safety constraints, particularly for heavy loads to be transported in challenging environments. Results. This paper covers one of the key tasks that must be completed in order to control an AGV system for a central and decentral architecture, for which we have already given a broad overview, as well as the differences between the architectures and their benefits and drawbacks. Originality. The author sees that the merging of various techniques we have will lead to more and new challenges as well as innovations, however, that practical application of distributed control still requires further research and studies and has a way to go in terms of taking other sections such as safety and sustainability into account. Practical value. The primary benefits and drawbacks of various technologies are discussed, as well as how we might improve the efficiency of some of them.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123057206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Michelin Uptis - Are airless tires the future of the automotive industry?","authors":"N. Nikolov, P. Siegfried","doi":"10.30977/at.2219-8342.2023.52.0.11","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2023.52.0.11","url":null,"abstract":"Problem. The paper addresses the question of whether the conversion of the entire automotive industry to airless tires, specifically focusing on the Michelin Uptis concept, is economically realistic and technically feasible for high-performance vehicles. Goal. The goal of the paper is to investigate and analyze the technical feasibility and economic impacts of airless tires, specifically the Michelin Uptis, through expert interviews, literature review, and research methodology. Methodology. The research methodology involves various research methods, including expert interviews, literature research, journal articles, press releases, and expert opinions. The paper relies on current and relevant sources to provide a comprehensive understanding of the topic. Expert interviews with industry professionals, such as Philipp Kranich from Mercedes Benz Consulting and Jochen Konrad, a tire developer at Pirelli, provide additional insights. Results. The technical feasibility of airless tires, specifically the Michelin Uptis, is examined, highlighting advantages such as puncture protection and environmental friendliness. However, concerns are raised regarding the structure's resilience, potential damage to spokes, weight and energy efficiency, and suitability for high-performance vehicles. The economic impacts of airless tires are also discussed, including the potential reduction in tire orders, changes in aftermarket services, logistical adaptations, and the pricing challenges associated with the Uptis concept. Originality and Practical Value. This paper offers an analysis of the technical and economic aspects of airless tires, specifically focusing on the Michelin Uptis concept. It provides expert insights, reviews relevant literature, and addresses the original research question. The findings contribute to the understanding of the feasibility and potential implications of airless tires in the automotive industry, aiding decision-makers in assessing the practical value and viability of adopting this tire technology.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114648650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical foundations of vehicle stability when moving uphill and at longitudinal roll back","authors":"M. Kolisnyk, Anatolii Berezyk, O. Lykhodii, Andrii Chevchenko, Andrii Chervonoshtan","doi":"10.30977/at.2219-8342.2023.52.0.01","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2023.52.0.01","url":null,"abstract":"Problem. The determination of the stages of stability for vehicles as technical systems when moving uphill on an inclined section of the road and their possible longitudinal roll back is considered. The considered stages ensure the safe operation of vehicles in various conditions and with various combinations of the values of the parameters that are included in the proposed equations characterizing the stability of the vehicle. Goal. The purpose of the paper is to improve the method of researching the physical foundations of the stability of vehicles when moving uphill on an inclined plane, the formation of mathematical models, which allows to significantly improve the mathematical support of the methods of calculating the stability of two-axle vehicles (cars, trucks, tractors, special and specialized vehicles, etc.) Methodology. The approaches adopted in the work to achieve the set goal are based on the classical laws of the mechanics of free-standing or moving objects, namely: the principle of possible movements, where calculated dynamic and mathematical models with their solutions are able to preserve the given conditions and parameters, and characterize the state of stability of the vehicle in case of its longitudinal roll back. Results. It was established and confirmed by a numerical examples that the longitudinal stability of a vehicle moving uphill depends on the longitudinal road slope, the vehicle design, the elasticity of the road surface, the critical overturning angle of the vehicle and its weight parameters. Originality. The proposed mathematical model of the longitudinal stability of the vehicle when moving uphill showed that its solution significantly depends on the values of the geometric parameters of the uphill and the vehicle, and also depends on the position of the center of gravity of the vehicle relative to the surface of the road surface. Practical value. The obtained equations for determining the values of the stability parameters of the vehicle when moving uphill on an inclined road section make it possible to specify the parameters for ensuring the logistics of vehicles in the conditions of their operation on uphill.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121316124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Technological methods of improving the quality and productivity of processing car engine parts","authors":"V. Kalchenko, Volodymyr Venzhega, Ya.V. Kuzhelnyi, V. Klimenko","doi":"10.30977/at.2219-8342.2023.52.0.03","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2023.52.0.03","url":null,"abstract":"Problem. The most high-precision parts of the car engine are camshaft and crankshaft, parts that require two-sided processing of the end surfaces: piston pins, valve springs. Traditional processing methods are used in their manufacture and repair. Therefore, taking into account the large volumes of car production, the improvement of existing and development of new processing methods is very important. Goal. The purpose of this work is the analysis and improvement of existing methods and the implementation for new ones of processing the specified parts to increase the productivity and accuracy of their processing. Methodology. The processing of support necks and cams is expedient to be carried out in one installation during deep high-speed grinding with crossed axes of the circle and camshaft due to stabilization of the cutting depth and feed along the contour with uneven rotation of the part. The method of high-speed milling of camshaft cams with crossed axes of the tool and parts on CNC machines is also promising. Root and connecting rod necks of crankshafts can be processed in one installation by deep high-speed grinding with crossed axes of the circle and the part due to stabilization of the depth of cutting and feed along the contour with uniform rotation of the part. For end surfaces, it is possible to introduce single-pass processing on double-sided end grinding machines with oriented grinding wheels with calibration areas. Results. The obtained results indicate a 25-30% increase in productivity and processing accuracy of the specified parts. Originality. It is used when processing the effect of the intersection of the axes of the tool and the part and carrying out a special correction of the tool, which allows to obtain a calibration area. Practical value. The proposed methods improve the parameters of accuracy, roughness and productivity of processing, which is an important scientific and practical task, whose solution will allow to increase the service life of car components and assemblies, reduce the cost of their production, and raise the level of competitiveness of products and services.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117179343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of impact of priority movement for urban public passenger transport on the quality of passenger service","authors":"V. Vdovychenko, I. Ivanov, Serhii Pidlubnyi, Mykyta Vasyliev","doi":"10.30977/at.2219-8342.2023.52.0.06","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2023.52.0.06","url":null,"abstract":"Problem. The article presents a view on solving the problem of the management formation measures to improve the quality of public transport services through the feasibility justification of implementing priority movement of urban public passenger transport in relation to the assessment of passengers' perception of the actual travel time along the route. Goal. The purpose of the work is to establish a characteristic relationship between the traffic parameters of route vehicles in the conditions of the priority of urban public passenger transport and time indicators of the quality assessment of passenger transport services. Method. The methodological basis for establishing a connection between traffic parameters in terms of the priority of urban public passenger transport and time indicators for evaluating the quality of transport service is a set of developed analytical models that describe the process of formation of passenger exchange at stopping points and time parameters of vehicle movement. Results. On the basis of the functional connection for the selected structure of the research object, it was established that the implementation of the urban public passenger transport priority with the organization of traffic on special lanes and unhindered passage of regulated intersections plays a significant role in improving the quality of passenger transport services. Originality. The assessment of the quality of transport service is based on establishing the level of compliance of each passenger's actual travel time with the previously planned. The use of travel time as a primary evaluation indicator is due to its leading role in the formation of quality criteria and the presence of influence on the parameters that determine the level of transport supply on the route. Practical meaning. The distribution of passengers at stops on route No. 24 «micro-district 602 – Akademika Pavlova subway st.» (Kharkiv, Ukraine) was obtained during modeling between the levels of perception of the quality of transport service showed that for everyday conditions, 8.9% and 27.8% of passengers (36.7% in total) receive a high-quality and suitable assessment, for traffic priority by sections – 32.3% and 64% (96.3% in total), when organizing priority passage at the intersection – 57.5% and 40.4% (97.9% in total). The obtained results indicate the expediency of implementing priority traffic from the standpoint of assessing the level of improvement in the quality of passenger service.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125020700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk modeling in working out the plan of developing the road transport cargo enterprise","authors":"I. Shevchenko, I. Dmytriiev, O. Dmytriieva","doi":"10.30977/at.2219-8342.2022.51.0.10","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2022.51.0.10","url":null,"abstract":"Problem. In recent years, there has been a rather stable trend of reorientation of the freight transportation market in Ukraine from the predominant use of rail transport to customers preferring road transport for moving goods. Relying on the indicated trend and the prospect of its preservation in view of the indisputable manoeuvre advantages of road transport in the conditions of martial law, the study of the problematic issues of the development of road transport cargo enterprises, among which the risk modeling of their operational activities occupies a prominent place, becomes relevant. Goal. The purpose of the scientific work is to study the methodological and applied aspects of risk modeling when working out a plan for developing a cargo enterprise of road transport. Methodology. The method of analysis and synthesis, system approach, observation method, comparative analysis, factor analysis method, simulation modeling method, and experimental method were used in the work to study the methodological and applied aspects of risk modeling when elaborating a plan for developing a road transport cargo enterprise. Results. The risk model presented in the study makes it possible to identify the optimal level of risk when elaborating a plan for development of a road transport cargo enterprise based on variants of the key indicator of the volume of cargo transportation (including financial indicators). Originality. In the process of modeling in one cycle, you can get up to 24 different options for the values of the optimal level of risk for the implementation of the plan for development of the road transport cargo enterprise, taking into account the differentiation of the parameters of the risk model, in particular, six options for the distance of cargo transportation and four classes of cargo. Practical value. The proposed methodical approach to risk modeling when working out a plan for developing a road transport cargo enterprise takes into account the probable change in demand for freight transportation, which gives the enterprise the opportunity to quickly respond to changes in market conditions and successfully plan activities in conditions of incomplete certainty, lack of information and the presence of risk..","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115602996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the load-bearing system of the loader according to the results of dynamic tests in the environment of Ansys Motion","authors":"O. Shcherbak, Vitaliy Ragulin, Andrii Suminov","doi":"10.30977/at.2219-8342.2022.51.0.06","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2022.51.0.06","url":null,"abstract":"Problem. The T-156B hinge frame of the loader, which is an upgraded frame of an agricultural tractor, during work operations creates loads for which it was not designed. Such loads lead to breakdowns and further shorten the life of the entire machine. The frame is the basic element around which the machine is built. The loader that had just been removed from the conveyor did not have built-in durability and reliability. While designing a road construction machine, an account of the features, nature, and conditions of its operation should be taken. Goal. Develop a hinge frame design technique that takes into account the loads experienced by the frame with a virtual simulation of real-world situations during the loader process. Methodology. The adopted approach is based on the use of a computer program Solidworks with three-dimensional modeling and a program Ansys motion for calculating the dynamics of multicomponent bodies taking into account the hinge and contact interaction. Results. In the work were considered three cases of technological operations of the loader. 1. Lifting a full bucket. 2. Collision with an obstacle that is difficult to overcome 3. Movement over an uneven surface with the raised loader arm. The results of the calculations provided forces and torques in the hinge of the half-frames, as well as the effort of the frame. Based on the results obtained, the endurance of the frame in the Ansys motion software package was calculated. Originality. The analysis of load-bearing systems with a virtual simulation of the machine’s actual behavior with the help of Ansys motion software allows to obtain more accurate results, significantly reducing the time for the design and cost of field testing. Practical value. This approach to the analysis of the carrier system behavior can be recommended for designing and determining the technological capabilities of wheeled, tracked, and special machines.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122776395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of the average torsional stiffness of tires of a double vehicle wheel during its interaction with the road surface","authors":"D. Leontiev, A. Frolov","doi":"10.30977/at.2219-8342.2022.51.0.02","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2022.51.0.02","url":null,"abstract":"Problem. In the scientific and methodological recommendations of forensic institutions and in the scientific and technical literature there are currently no universal methods for determining the braking parameters of cargo multi-axle vehicles that have wheels with double tires, which affects the results of drawing up the conclusions of the motor-technical expertise. The lack of universal methods is due to the difficulty of determining the actual braking, especially when the tires of dual wheels interact with the road surface. Goal. The goal is justification of the method of determining the average torsional stiffness of tires of a double vehicle wheel during its interaction with the road surface. Methodology. The approaches adopted in the work to achieve the set goal are based on the theoretical foundations of the deformation of elastic elements, which are located parallel to each other. Results. Equations are determined that allow you to calculate the value of the average torsional stiffness of the tire for wheels that have double, triple or quadruple tires. Originality. The results of the research provide a general idea of the effect of the pressure in the tires of a double wheel on the value of its average torsional stiffness. Practical value. The obtained results can be recommended to expert motor technicians when drawing up a conclusion of an expertise or an expert study. Besides, the results of the study can be used in the educational process during the training of specialists in the field of transport or mechanical engineering","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115497697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of increased energy efficiency of vehicles with a rational reduction of engine capacity","authors":"M. Podrigalo, Yu.V. Tarasov, M. Kholodov, V. Shein, A. Tkachenko, Oleksii Kasianenko","doi":"10.30977/at.2219-8342.2022.51.0.03","DOIUrl":"https://doi.org/10.30977/at.2219-8342.2022.51.0.03","url":null,"abstract":"Problem. The tendency to reduce the working volume of internal combustion engines, which has emerged in recent years in the global automotive industry, is due to the need to improve the environmental situation and energy efficiency of road transport. Goal. The aim of the study is to increase the energy efficiency of vehicles by rationally reducing the maximum effective engine capacity. Methodology. The work uses the method of partial accelerations, implemented in a mobile registration and measurement complex, which allowed the authors to obtain an improved formula for calculating the force of aerodynamic resistance. Experimental studies of car aerodynamics were also carried out. Results. The article presents the results of the authors' research, which made it possible to prove the possibility of reducing the power of the internal combustion engine while maintaining the specified maximum speed and the specified level of indicators of the dynamic properties of cars. Originality. The relationship between the degree of use of the maximum engine power and the relative change in the effective specific fuel consumption of a carburetor gasoline engine with direct injection of gasoline and diesel is determined. Practical value. Calculations performed on the example of the ZAZ-1103 \"Slavuta\" car showed that a rational reduction in effective power allows for a 9.5% reduction in fuel consumption, and for an engine with direct injection of gasoline and diesel engines, this leads to an increase in fuel consumption by 6.7 % and 20.3%, respectively.","PeriodicalId":121866,"journal":{"name":"Automobile transport","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122924051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}