Fused Deposition Modelling (FDM) is the most common 3D printing technology. An object formed through continuous layering until completion is known as an additive process while other processes with different methods are also relevant. In this paper, mechanical properties were analysed using two distinct kinds of printed polyethylene terephthalate (PET) as tensile test specimens. The materials used consist of recycled PET and virgin PET. An assessment of all the forty test pieces of both kinds of PET was undertaken. A comparison of the test samples’ tensile strength values, difference in stress-strain curves, and elongation at break was also carried out. The reasoning behind the fracturing of test pieces that printed with different settings is presented in part by the depiction of the fractured specimens following the tensile test. An optimal route was revealed to be 3D printing with recycled PET, as per the mechanical testing. The hardness of the recycled filament decreased to 6%, while the tensile strength and shear strength increased to 14.7 and 2.8%, respectively. Nonetheless, no changes occurred to the tensile modulus elasticity. Despite notable differences being observed in the results of the recycled PET filament, no substantial differences were found prior or post-recycling in the mechanical properties of the PET filament. In conclusion, the demand for improved recycled 3D printing filament technologies is heightened due to the comparable mechanical features of the specimens of both the 3D printed recycled and virgin materials. With tensile strength figures reaching as high as 43.15MPa at Recycled PET and 3.12% being the greatest elongation at 40% Recycled PET, 100% Recycled is the ideal printing setting.
{"title":"Development of 3D printing raw materials from plastic waste","authors":"Alaeddine Oussai, Z. Bártfai, L. Kátai","doi":"10.31410/eraz.2019.177","DOIUrl":"https://doi.org/10.31410/eraz.2019.177","url":null,"abstract":"Fused Deposition Modelling (FDM) is the most common 3D printing technology. An object formed through continuous layering until completion is known as an additive process while other processes with different methods are also relevant. In this paper, mechanical properties were analysed using two distinct kinds of printed polyethylene terephthalate (PET) as tensile test specimens. The materials used consist of recycled PET and virgin PET. An assessment of all the forty test pieces of both kinds of PET was undertaken. A comparison of the test samples’ tensile strength values, difference in stress-strain curves, and elongation at break was also carried out. The reasoning behind the fracturing of test pieces that printed with different settings is presented in part by the depiction of the fractured specimens following the tensile test. An optimal route was revealed to be 3D printing with recycled PET, as per the mechanical testing. The hardness of the recycled filament decreased to 6%, while the tensile strength and shear strength increased to 14.7 and 2.8%, respectively. Nonetheless, no changes occurred to the tensile modulus elasticity. Despite notable differences being observed in the results of the recycled PET filament, no substantial differences were found prior or post-recycling in the mechanical properties of the PET filament. In conclusion, the demand for improved recycled 3D printing filament technologies is heightened due to the comparable mechanical features of the specimens of both the 3D printed recycled and virgin materials. With tensile strength figures reaching as high as 43.15MPa at Recycled PET and 3.12% being the greatest elongation at 40% Recycled PET, 100% Recycled is the ideal printing setting.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126461288","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}
S. Negovanović, A. Belingar, M. Radojević, B. Radičević, G. Topisirović
Plant production in a protected area is the most intensive form of production in agriculture. Plant growth is intense throughout the year to produce high yields and good product quality. By definition, microclimate represents the climatic conditions of small spaces measured up to 2m in height from the land surface. The factors of the microclimate are soil temperature, air temperature, air humidity, soil humidity, light, and the amount of carbon dioxide (CO2). For intensive production indoors (greenhouses) it is very important that all factors of the microclimate be within the allowed limits for a particular cultivated crop. Therefore, our project aims at indicating these factors and signaling to the manufacturer if there is any reason for any of these factors to be corrected.
{"title":"Improvement of The Microclimate Monitoring Device in the Greenhouse","authors":"S. Negovanović, A. Belingar, M. Radojević, B. Radičević, G. Topisirović","doi":"10.17676/hae.2019.35.26","DOIUrl":"https://doi.org/10.17676/hae.2019.35.26","url":null,"abstract":"Plant production in a protected area is the most intensive form of production in agriculture. Plant growth is intense throughout the year to produce high yields and good product quality. By definition, microclimate represents the climatic conditions of small spaces measured up to 2m in height from the land surface. The factors of the microclimate are soil temperature, air temperature, air humidity, soil humidity, light, and the amount of carbon dioxide (CO2). For intensive production indoors (greenhouses) it is very important that all factors of the microclimate be within the allowed limits for a particular cultivated crop. Therefore, our project aims at indicating these factors and signaling to the manufacturer if there is any reason for any of these factors to be corrected.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124523350","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}
Consumers have an important role to play in the transition to a circular economy by making more sustainable decisions and further supporting the functioning of value groups through their consumer choices. To this end, it is necessary to promote circular and sustainable policies and practices that can lead to the emergence of demonstration initiatives. From the theory of the circular economy and the sustainability literature, 10 groups of factors can be identified that can influence the acceptance of circular products and services for consumers. None of the aspects were specifically related to the consumption and recycling of organic food. Food supply systems are identified as a potential area for the implementation of circular concepts; however, these concepts focus mainly on food production and the recycling of surplus food. Current circular solutions place less emphasis on food-related consumption, separating it from production or waste streams. In the next study, we would like to demonstrate that consumption trends have surprisingly overlapped in recent years (during Covid), resulting in a generational change in the consumption of organic food. And the clear driving force of this change is circular thinking and gaining preferences.
{"title":"Circular Characteristics of Organic Food Consumption, New Consumption Trends in Hungary","authors":"C. Fogarassy, Edina Berecz","doi":"10.17676/hae.2022.41.11","DOIUrl":"https://doi.org/10.17676/hae.2022.41.11","url":null,"abstract":"Consumers have an important role to play in the transition to a circular economy by making more sustainable decisions and further supporting the functioning of value groups through their consumer choices. To this end, it is necessary to promote circular and sustainable policies and practices that can lead to the emergence of demonstration initiatives. From the theory of the circular economy and the sustainability literature, 10 groups of factors can be identified that can influence the acceptance of circular products and services for consumers. None of the aspects were specifically related to the consumption and recycling of organic food. Food supply systems are identified as a potential area for the implementation of circular concepts; however, these concepts focus mainly on food production and the recycling of surplus food. Current circular solutions place less emphasis on food-related consumption, separating it from production or waste streams. In the next study, we would like to demonstrate that consumption trends have surprisingly overlapped in recent years (during Covid), resulting in a generational change in the consumption of organic food. And the clear driving force of this change is circular thinking and gaining preferences.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116786498","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}
Pyrolysis of wastes and agricultural by-products was addressed in the study. During the energetical utilization of biomasses, the pyrolysis power plant produces electricity and heat, so we examined the possibilities of using the generated waste heat. This waste heat can be used at the place of generation, to produce the so-called "cold energy", which can meet the energy demand of cold stores.
{"title":"Generating Cold Energy Using Waste Heat from a Pyrolysis Generator (CHP)","authors":"V. Madár, N. Schrempf, András Betovics, L. Toth","doi":"10.17676/hae.2021.40.78","DOIUrl":"https://doi.org/10.17676/hae.2021.40.78","url":null,"abstract":"Pyrolysis of wastes and agricultural by-products was addressed in the study. During the energetical utilization of biomasses, the pyrolysis power plant produces electricity and heat, so we examined the possibilities of using the generated waste heat. This waste heat can be used at the place of generation, to produce the so-called \"cold energy\", which can meet the energy demand of cold stores.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123311948","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}
C. Fogarassy, Dorottya Ivanyos, Tamás Bori, L. Ózsvári
: The profitability of “mainstream” economic systems lies in outsourced external factors, which make it cheaper to waste resources than to track and eventually recover them. However, non-circular economic models, that is, without feedback, carry many risks. These include deficiencies in primary resources, including resource price volatility, declining supply chain efficiency, increasing bans on waste trading, declining costs of renewable energy sources, etc., and these unfavorable patterns can also be termed “linear risks”. Through the analysis of open and closed business models and the presentation of the value-creating processes of the ReSolve matrix, we want to demonstrate how modern IT systems and digital solutions can increase the efficient use of resources and reduce production risks.
{"title":"Value-creating processes of circular business models in the development of IT systems","authors":"C. Fogarassy, Dorottya Ivanyos, Tamás Bori, L. Ózsvári","doi":"10.17676/HAE.2020.38.30","DOIUrl":"https://doi.org/10.17676/HAE.2020.38.30","url":null,"abstract":": The profitability of “mainstream” economic systems lies in outsourced external factors, which make it cheaper to waste resources than to track and eventually recover them. However, non-circular economic models, that is, without feedback, carry many risks. These include deficiencies in primary resources, including resource price volatility, declining supply chain efficiency, increasing bans on waste trading, declining costs of renewable energy sources, etc., and these unfavorable patterns can also be termed “linear risks”. Through the analysis of open and closed business models and the presentation of the value-creating processes of the ReSolve matrix, we want to demonstrate how modern IT systems and digital solutions can increase the efficient use of resources and reduce production risks.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123425353","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}
Discrete element method (DEM) is a Lagrangian description based numerical technique used for modelling the mechanical behavior of granular materials. For using the DEM model, the micromechanical parameter values used in the governing equations must be determined beforehand. This is the so-called calibration problem. In most of the cases these micromechanical parameters cannot be directly measured, their values must be systematically changed until the modeled macro behavior of the granular assembly will be the same, as the real-life behavior. In this article we propose the simplest possible calibration method, the so-called angle of repose test for application in case of agricultural crop product related problems. We examine the effect of particle shape on the value of angle of repose, ad give statistically acceptable empirical function to describe this dependence mathematically.
{"title":"The effect of particle shape on the angle of repose test based calibration of discrete element models","authors":"Adrienn Bablena, N. Schrempf, I. Keppler","doi":"10.17676/hae.2021.40.39","DOIUrl":"https://doi.org/10.17676/hae.2021.40.39","url":null,"abstract":"Discrete element method (DEM) is a Lagrangian description based numerical technique used for modelling the mechanical behavior of granular materials. For using the DEM model, the micromechanical parameter values used in the governing equations must be determined beforehand. This is the so-called calibration problem. In most of the cases these micromechanical parameters cannot be directly measured, their values must be systematically changed until the modeled macro behavior of the granular assembly will be the same, as the real-life behavior. In this article we propose the simplest possible calibration method, the so-called angle of repose test for application in case of agricultural crop product related problems. We examine the effect of particle shape on the value of angle of repose, ad give statistically acceptable empirical function to describe this dependence mathematically.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114888385","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}
: Reuse of rockwool slabs could improve sustainability of soilless cultivation. In this study effects of reused, two-year-old rockwool slabs on yield and quality of ‘Daras F1’ hot pepper hybrid was investigated, under commercial glasshouse conditions. Special attention was paid to anthocyanin discoloration disorder as the most important quality disorder of this pepper type. Total yield was the same, 15.26 kg m-2, for both treatments, while weight ratio of fruits having anthocyanin discoloration was significantly less for reused slabs (9%) than for the new ones (13%). Possibly higher buffer capacity of reused slabs reduced salt induced osmotic stress causing lower rate of anthocyanin biosynthesis.
再利用岩棉板可提高无土栽培的可持续性。在商业温室条件下，研究了重复使用2年生岩棉板对‘Daras F1’辣椒杂种产量和品质的影响。花青素变色病是该品种辣椒最主要的品质病害。两种处理的总产量相同，均为15.26 kg m-2，而重复使用的板的花色苷变色果实的重量比(9%)显著低于新处理的(13%)。可能重用板的缓冲能力较高，减少了盐诱导的渗透应力，从而降低了花青素的生物合成速率。
{"title":"Effect of Reused Rockwool Slabs on the Performance of ‘Daras F1’ Hot Pepper Under Glasshouse Conditions","authors":"A. Ombódi, M. Valkai","doi":"10.17676/hae.2020.37.48","DOIUrl":"https://doi.org/10.17676/hae.2020.37.48","url":null,"abstract":": Reuse of rockwool slabs could improve sustainability of soilless cultivation. In this study effects of reused, two-year-old rockwool slabs on yield and quality of ‘Daras F1’ hot pepper hybrid was investigated, under commercial glasshouse conditions. Special attention was paid to anthocyanin discoloration disorder as the most important quality disorder of this pepper type. Total yield was the same, 15.26 kg m-2, for both treatments, while weight ratio of fruits having anthocyanin discoloration was significantly less for reused slabs (9%) than for the new ones (13%). Possibly higher buffer capacity of reused slabs reduced salt induced osmotic stress causing lower rate of anthocyanin biosynthesis.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129731391","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}
Today’s changing environmental challenges and accelerating technological advances over the past decade have presented companies with new challenges. There is an increasing emphasis on human resources, which can give companies a real competitive edge. At the same time, the focus is on the development of HR systems and their connection to other systems that determine how companies operate. Individual performance evaluation, in close connection with other HR functions, nowadays, in addition to evaluation, which may have a development or remuneration function, is linked to the performance of the organization. Accurately defining the latter and developing its measurement methodology, though not primarily as an HR function in most cases, is essential in the pursuit of effective operation. It is worth defining the indicators that may apply to a particular organizational unit and, at a higher level, to the whole company. The definition, implementation and measurement of indices and KPIs presupposes that the specified qualitative and quantitative indicators provide an appropriate framework for the evaluation of real performance. The performance of individuals determines the performance of an organizational unit, which in aggregate also predicts corporate-level performance.
{"title":"Applicability of Organizational Performance Indicators","authors":"Eszter Fekete","doi":"10.17676/hae.2021.39.16","DOIUrl":"https://doi.org/10.17676/hae.2021.39.16","url":null,"abstract":"Today’s changing environmental challenges and accelerating technological advances over the past decade have presented companies with new challenges. There is an increasing emphasis on human resources, which can give companies a real competitive edge. At the same time, the focus is on the development of HR systems and their connection to other systems that determine how companies operate. Individual performance evaluation, in close connection with other HR functions, nowadays, in addition to evaluation, which may have a development or remuneration function, is linked to the performance of the organization. Accurately defining the latter and developing its measurement methodology, though not primarily as an HR function in most cases, is essential in the pursuit of effective operation. It is worth defining the indicators that may apply to a particular organizational unit and, at a higher level, to the whole company. The definition, implementation and measurement of indices and KPIs presupposes that the specified qualitative and quantitative indicators provide an appropriate framework for the evaluation of real performance. The performance of individuals determines the performance of an organizational unit, which in aggregate also predicts corporate-level performance.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127011984","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}
A. Nyéki, M. Neményi, G. Teschner, G. Milics, A. Kovács
Nowadays we are not able to exploit the technical and IT advantages provided by precision technologies from an ecological or economic point of view. More than 20 years of experience unfortunately proves that we do not have adequate applied biological knowledge. Today, our technical and IT knowledge provides us with many opportunities, e.g., during sowing we can change the distance between seeds, therefore altering the density of plants, or even switching to another variety. We can collect a lot of data during sowing but we can also take into account previous experience with the soil. The problem is that the relationship between the known data and the optimal number (density) of plants is still not yet known satisfactorily. In this article we present the opportunities that IoT offers, primarily in terms of sustainable agriculture. The worldwide spread of IoT can also be considered the 3rd green revolution
{"title":"Application Possiblities and Benefits of IOT (Internet of Things) in Agricultural Practice. Quo Vadis IOT?","authors":"A. Nyéki, M. Neményi, G. Teschner, G. Milics, A. Kovács","doi":"10.17676/hae.2020.37.90","DOIUrl":"https://doi.org/10.17676/hae.2020.37.90","url":null,"abstract":"Nowadays we are not able to exploit the technical and IT advantages provided by precision technologies from an ecological or economic point of view. More than 20 years of experience unfortunately proves that we do not have adequate applied biological knowledge. Today, our technical and IT knowledge provides us with many opportunities, e.g., during sowing we can change the distance between seeds, therefore altering the density of plants, or even switching to another variety. We can collect a lot of data during sowing but we can also take into account previous experience with the soil. The problem is that the relationship between the known data and the optimal number (density) of plants is still not yet known satisfactorily. In this article we present the opportunities that IoT offers, primarily in terms of sustainable agriculture. The worldwide spread of IoT can also be considered the 3rd green revolution","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130204098","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}
Achraf Qor-el-aine, József Benécs, A. Béres, G. Géczi
Particulate matter (PM) is the main determinant of air pollution caused by a variety of natural and human-caused sources. Because it can be suspended in the atmosphere for long periods of time and travel long distances, it can cause a major health crisis for humans and damage the environment as well. Studies are still required to understand how the PM moves around obstacles, especially in urban areas. In this study, small scale experiments were carried out to look into the effects of simple obstacles, heights and distance from the source on the PM10 concentration. Results show that when obstacle heights and distance from the source increase, the PM10 average concentration decrease. Also, turbulence created by the obstacles affects the PM10 concentration in both sensors before and after the obstacle, mainly in cases of high wind speed. In addition, the use of incense sticks as a source of PM pollution illustrated that moderate burning of incense sticks in indoor places could skyrocket the PM10 concentration to an unhealthy level.
{"title":"Small Scale Experiments of PM10 Dispersion Around Obstacles","authors":"Achraf Qor-el-aine, József Benécs, A. Béres, G. Géczi","doi":"10.17676/hae.2021.40.96","DOIUrl":"https://doi.org/10.17676/hae.2021.40.96","url":null,"abstract":"Particulate matter (PM) is the main determinant of air pollution caused by a variety of natural and human-caused sources. Because it can be suspended in the atmosphere for long periods of time and travel long distances, it can cause a major health crisis for humans and damage the environment as well. Studies are still required to understand how the PM moves around obstacles, especially in urban areas. In this study, small scale experiments were carried out to look into the effects of simple obstacles, heights and distance from the source on the PM10 concentration. Results show that when obstacle heights and distance from the source increase, the PM10 average concentration decrease. Also, turbulence created by the obstacles affects the PM10 concentration in both sensors before and after the obstacle, mainly in cases of high wind speed. In addition, the use of incense sticks as a source of PM pollution illustrated that moderate burning of incense sticks in indoor places could skyrocket the PM10 concentration to an unhealthy level.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130723282","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}
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