Pub Date : 2019-06-28DOI: 10.19080/cerj.2019.08.555743
Antony Kodsy
Steel Reinforcement corrosion has been reported to be a major contributor in the deterioration of concrete structures. The use of FRP bars as reinforcement in concrete structures has proven to provide an effective solution for this durability issue [1]. The physical and mechanical properties and surface shape of GFRP bars are significantly different from steel bars. This difference cause GFRP bars to have lower bonding properties with concrete than steel bars causing bond performance to be a major concern when designing GFRP reinforced concrete elements [2]. Several pullout tests have been done to evaluate bond strength of FRP bars which is a major factor in estimating development length [3-5]. The ACI 440.1R-15 [3] defines development length as the embedment in concrete required to transfer the force in the bar through bond (equation 10.1a). The used GFRP bars in this study had a guaranteed tensile strength (mean tensile strength of test specimens minus three times standard deviation [3] of 121 ksi (834 MPa). This value falls within the range of the ACI 440.1R-15 GFRP bar tensile strength values of 70 to 230 ksi (483 to 690 MPa). Discussion and Results
{"title":"Bond Performance of Sanded Surface and Threaded Smooth Gfrp Bars","authors":"Antony Kodsy","doi":"10.19080/cerj.2019.08.555743","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555743","url":null,"abstract":"Steel Reinforcement corrosion has been reported to be a major contributor in the deterioration of concrete structures. The use of FRP bars as reinforcement in concrete structures has proven to provide an effective solution for this durability issue [1]. The physical and mechanical properties and surface shape of GFRP bars are significantly different from steel bars. This difference cause GFRP bars to have lower bonding properties with concrete than steel bars causing bond performance to be a major concern when designing GFRP reinforced concrete elements [2]. Several pullout tests have been done to evaluate bond strength of FRP bars which is a major factor in estimating development length [3-5]. The ACI 440.1R-15 [3] defines development length as the embedment in concrete required to transfer the force in the bar through bond (equation 10.1a). The used GFRP bars in this study had a guaranteed tensile strength (mean tensile strength of test specimens minus three times standard deviation [3] of 121 ksi (834 MPa). This value falls within the range of the ACI 440.1R-15 GFRP bar tensile strength values of 70 to 230 ksi (483 to 690 MPa). Discussion and Results","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83926446","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}
Pub Date : 2019-06-25DOI: 10.19080/cerj.2019.08.555741
N. Arabi
The mechanical properties of sand-lime bricks produced by autoclaving under different conditions and incorporation of granulated slag have been investigated previously. In this study, the relationship is established between the structure, the phases formed and the strength. Based lime and granulated slag a new binder is developed. This is cured at saturated vapour pressures of 1.0 and 1.8MPa. The results showed a decrease in compressive strength due to the substitution. The microstructure analysis showed that reaction products consist mainly of 11Å tobermorite and xonotlite. Also, when increasing the autoclave temperature, it results in an increase in xonotlite relative to tobermorite. The X-ray diffractions of these phases are very low hardly visible, they are masked by the presence of quartz. Their intensities increase with the presence of slag.
{"title":"Granulated Slag Based Autoclaved Sand-Lime Bricks","authors":"N. Arabi","doi":"10.19080/cerj.2019.08.555741","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555741","url":null,"abstract":"The mechanical properties of sand-lime bricks produced by autoclaving under different conditions and incorporation of granulated slag have been investigated previously. In this study, the relationship is established between the structure, the phases formed and the strength. Based lime and granulated slag a new binder is developed. This is cured at saturated vapour pressures of 1.0 and 1.8MPa. The results showed a decrease in compressive strength due to the substitution. The microstructure analysis showed that reaction products consist mainly of 11Å tobermorite and xonotlite. Also, when increasing the autoclave temperature, it results in an increase in xonotlite relative to tobermorite. The X-ray diffractions of these phases are very low hardly visible, they are masked by the presence of quartz. Their intensities increase with the presence of slag.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80384946","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}
Pub Date : 2019-06-20DOI: 10.19080/cerj.2019.08.555740
D. M
Most of the synthetic organic chemicals and naturally occurring substances, enter the aquatic medium in several different ways and, according to their water solubility, can be transported and distributed in the water cycle. The effluents of urban wastewater treatment plants are among the major responsible for the release of this kind of contaminants into the environment. Although conventional biological processes are usually efficient for the degradation of pollutants occurring in wastewater, refractory compounds are not effectively removed. In such cases the use of Advanced Oxidation Processes (AOPs) may improve the overall removal efficiency of such compounds. In the Past two decades, advanced oxidation processes (AOPs) have been proven to be powerful and efficient treatment methods for degrading recalcitrant materials or mineralizing stable, inhibitory, or toxic contaminants. Advanced oxidation processes are those groups of technologies that lead to hydroxyl radical (_OH) generation as the primary oxidant (second highest powerful oxidant after fluorine). Hydroxyl radicals are non-selective in nature and they can react without any other additives with a wide range of contaminants. These hydroxyl radicals attack organic molecules by either abstracting a hydrogen atom or adding a hydrogen atom to the double bonds. It makes new oxidized intermediates with lower molecular weight or carbon dioxide and water in case of complete mineralization.
{"title":"Gasoline Compounds Removal from Wastewater by UV& UV/H202 Process","authors":"D. M","doi":"10.19080/cerj.2019.08.555740","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555740","url":null,"abstract":"Most of the synthetic organic chemicals and naturally occurring substances, enter the aquatic medium in several different ways and, according to their water solubility, can be transported and distributed in the water cycle. The effluents of urban wastewater treatment plants are among the major responsible for the release of this kind of contaminants into the environment. Although conventional biological processes are usually efficient for the degradation of pollutants occurring in wastewater, refractory compounds are not effectively removed. In such cases the use of Advanced Oxidation Processes (AOPs) may improve the overall removal efficiency of such compounds. In the Past two decades, advanced oxidation processes (AOPs) have been proven to be powerful and efficient treatment methods for degrading recalcitrant materials or mineralizing stable, inhibitory, or toxic contaminants. Advanced oxidation processes are those groups of technologies that lead to hydroxyl radical (_OH) generation as the primary oxidant (second highest powerful oxidant after fluorine). Hydroxyl radicals are non-selective in nature and they can react without any other additives with a wide range of contaminants. These hydroxyl radicals attack organic molecules by either abstracting a hydrogen atom or adding a hydrogen atom to the double bonds. It makes new oxidized intermediates with lower molecular weight or carbon dioxide and water in case of complete mineralization.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73988371","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}
Pub Date : 2019-06-18DOI: 10.19080/cerj.2019.08.555739
Bassam A. Tayeh
Succar [3] defined BIM as “a set of interacting policies, processes and technologies generating a methodology to manage the essential building design and project data in digital format throughout the building’s life-cycle”. BIM has developed civil engineering industries and construction process over the last years [4]. The implementation of BIM has been slowed particularly in small firms [5,6]. Many solutions have either concentrated onto technical issues (for example, software interoperability and software and training costs) or non-technical issues (for example, cultural change and legal uncertainties) [4,7]. However, solving these issues needs a better knowledge about Critical Success Factors (CSFs) to implement BIM successfully [8]. Rockart [9] defined CSFs as: “few key areas of activity where favorable results are absolutely necessary for a manager to reach his/ her goals.” Therefore, CSFs for BIM implementation was defined by Won [10] as a group of key areas that motivate stakeholders to alter their traditional project delivery system to implement BIM collaboratively from the beginning of design phase to facility management phase.
{"title":"Critical Success Factors for Implementing Building Information Modeling (BIM) in Construction Industry","authors":"Bassam A. Tayeh","doi":"10.19080/cerj.2019.08.555739","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555739","url":null,"abstract":"Succar [3] defined BIM as “a set of interacting policies, processes and technologies generating a methodology to manage the essential building design and project data in digital format throughout the building’s life-cycle”. BIM has developed civil engineering industries and construction process over the last years [4]. The implementation of BIM has been slowed particularly in small firms [5,6]. Many solutions have either concentrated onto technical issues (for example, software interoperability and software and training costs) or non-technical issues (for example, cultural change and legal uncertainties) [4,7]. However, solving these issues needs a better knowledge about Critical Success Factors (CSFs) to implement BIM successfully [8]. Rockart [9] defined CSFs as: “few key areas of activity where favorable results are absolutely necessary for a manager to reach his/ her goals.” Therefore, CSFs for BIM implementation was defined by Won [10] as a group of key areas that motivate stakeholders to alter their traditional project delivery system to implement BIM collaboratively from the beginning of design phase to facility management phase.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74512584","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}
Pub Date : 2019-06-18DOI: 10.19080/cerj.2019.08.555738
Akpila Sb
A model that predicts the settlement of pile in the coastal regions of Nigeria (Lekki, Aja, Ikoyi, Victoria Island, Magodo, Ikorodu, Ipakodo and Festac) in Lagos was studied through the use of statistical analysis. Descriptive analysis, parametric test, correlation and regression were used to determine a significant relationship between stress and its settlement. A predictive model describing the relationship between stress and maximum settlement of these piles was generated. The results reveal that the settlement increased by 0.0009mm for every one-point increase in stress. A predictive stress-settlement model was developed with a regression coefficient of 0.8428. The model may be useful in providing settlement information on piles driven within the Lagos.
{"title":"Stress-Settlement Model of Piles in the Coastal Regions of Nigeria","authors":"Akpila Sb","doi":"10.19080/cerj.2019.08.555738","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555738","url":null,"abstract":"A model that predicts the settlement of pile in the coastal regions of Nigeria (Lekki, Aja, Ikoyi, Victoria Island, Magodo, Ikorodu, Ipakodo and Festac) in Lagos was studied through the use of statistical analysis. Descriptive analysis, parametric test, correlation and regression were used to determine a significant relationship between stress and its settlement. A predictive model describing the relationship between stress and maximum settlement of these piles was generated. The results reveal that the settlement increased by 0.0009mm for every one-point increase in stress. A predictive stress-settlement model was developed with a regression coefficient of 0.8428. The model may be useful in providing settlement information on piles driven within the Lagos.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82048065","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}
Pub Date : 2019-05-23DOI: 10.19080/cerj.2019.08.555736
K. Ujma-Wąsowicz
In contemporary Poland, disability is no longer a taboo subject. Both in legislative solutions and in public awareness, including through scientific research, many positive things are happening in our country. The author of the account is an architect: a scientist and an academic teacher. For her, the greatest value in acquiring knowledge and in its disseminating lies in, on the one hand, cooperation with foundations working for the benefit of people with disabilities and, on the other hand, activities in associations of professionals who have an impact on the quality of the built environment. (the author is the head of the Silesian branch of Association of Polish Town Planners and is a member of Polish Ergonomics Society).
{"title":"The Adapted Building for the Blind – Case Study","authors":"K. Ujma-Wąsowicz","doi":"10.19080/cerj.2019.08.555736","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555736","url":null,"abstract":"In contemporary Poland, disability is no longer a taboo subject. Both in legislative solutions and in public awareness, including through scientific research, many positive things are happening in our country. The author of the account is an architect: a scientist and an academic teacher. For her, the greatest value in acquiring knowledge and in its disseminating lies in, on the one hand, cooperation with foundations working for the benefit of people with disabilities and, on the other hand, activities in associations of professionals who have an impact on the quality of the built environment. (the author is the head of the Silesian branch of Association of Polish Town Planners and is a member of Polish Ergonomics Society).","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80804360","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}
Pub Date : 2019-05-23DOI: 10.19080/cerj.2019.08.555737
Jose Luis Cabanes
Automatic photogrammetry is based on new theoretical foundations. We must remember that the onset of digital photogrammetry just 30 years ago was entirely manual, and the evaluation of results was only possible in a line format. Subsequently, photo-modelling techniques added the possibility of photo-texturing surfaces using a methodology that was initially manual. Processes were automated in parallel with developments in artificial vision. During the first decade of this century, semiautomatic applications were launched that handled with a high level of automation the two basic phases of a project: namely, the construction of a camera model and its subsequent use. The construction of the model was handled using coded or backlit targets for the identification of orientation points, and the use of these applications was facilitated with techniques of linear correlation using image pairs (as supported by the principles of epipolar geometry) to initially obtain deep recovery or a point cloud model–and then a meshed model or DSM (digital surface model) (Figure 1).
{"title":"Reconstruction of Historical Buildings using Structure from Motion (SfM) Applications. An Operational Evaluation and Graphic Analysis","authors":"Jose Luis Cabanes","doi":"10.19080/cerj.2019.08.555737","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555737","url":null,"abstract":"Automatic photogrammetry is based on new theoretical foundations. We must remember that the onset of digital photogrammetry just 30 years ago was entirely manual, and the evaluation of results was only possible in a line format. Subsequently, photo-modelling techniques added the possibility of photo-texturing surfaces using a methodology that was initially manual. Processes were automated in parallel with developments in artificial vision. During the first decade of this century, semiautomatic applications were launched that handled with a high level of automation the two basic phases of a project: namely, the construction of a camera model and its subsequent use. The construction of the model was handled using coded or backlit targets for the identification of orientation points, and the use of these applications was facilitated with techniques of linear correlation using image pairs (as supported by the principles of epipolar geometry) to initially obtain deep recovery or a point cloud model–and then a meshed model or DSM (digital surface model) (Figure 1).","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88878970","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}
Pub Date : 2019-04-24DOI: 10.19080/cerj.2019.08.555729
Y. Perera-Mercado
This study is regarding the review of the production, evolution and potential uses of advanced aggregates based on waste and/or industrial by-products for the construction field, in order to promote the conservation of the environment from pollution and prevent natural resources from depletion; thereby giving way to sustainable development. Additionally, a review of smart aggregates was made in order to understand their potential contribution for the generation of smart infrastructures. The current research indicates that there is a potential niche associated with smart lightweight aggregates development that could be part of future investigations.
{"title":"Synthetic Aggregates: Their Role in the Production of Smart Infrastructures","authors":"Y. Perera-Mercado","doi":"10.19080/cerj.2019.08.555729","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555729","url":null,"abstract":"This study is regarding the review of the production, evolution and potential uses of advanced aggregates based on waste and/or industrial by-products for the construction field, in order to promote the conservation of the environment from pollution and prevent natural resources from depletion; thereby giving way to sustainable development. Additionally, a review of smart aggregates was made in order to understand their potential contribution for the generation of smart infrastructures. The current research indicates that there is a potential niche associated with smart lightweight aggregates development that could be part of future investigations.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77101555","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}
Pub Date : 2019-04-08DOI: 10.19080/cerj.2019.08.555727
M. Marizwan
Transverse Rumble Strip (TRS) are placed across the travel lanes of the roadway and perpendicular to flow of vehicles. The strips typically placed crossing the roadway surface to provide a tactile and audible warning to alert drivers on unusual traffic conditions. The main aim of this study is to evaluate the effectiveness of the TRS to reduce operating speed of traffic along selected road sections. Types of analysis conducted were speed distribution, average speed reduction and rate of braking by road users before and after the installation of TRS. Two locations were selected for this study i.e. Jalan Sultan and Jalan Barat. The key findings obtained in this study is operating speed was reduced at both locations after the installation of TRS. The speed compliancy rate was also increased with the presence of TRS at both locations. The compliancy was maintained even after 1-week of TRS installation. In evaluating the rate of braking, the higher rate was obtained after 1-day of TRS installation than any other period on both sites. Due to its potential as a countermeasure in reducing or controlling operating speed, it is recommended that TRS is installed at high risk location such as at curve or approaching intersection. However, TRS usage at downhill slope should be further studied or improvised due to the non-significant speed reduction obtained in this study. Precautions should be taken in ensuring that the specifications and materials used for TRS is following the standard and comply with the surface skid resistance value.
{"title":"The Effectiveness of Transverse Rumble Strip to Reduce Speed","authors":"M. Marizwan","doi":"10.19080/cerj.2019.08.555727","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555727","url":null,"abstract":"Transverse Rumble Strip (TRS) are placed across the travel lanes of the roadway and perpendicular to flow of vehicles. The strips typically placed crossing the roadway surface to provide a tactile and audible warning to alert drivers on unusual traffic conditions. The main aim of this study is to evaluate the effectiveness of the TRS to reduce operating speed of traffic along selected road sections. Types of analysis conducted were speed distribution, average speed reduction and rate of braking by road users before and after the installation of TRS. Two locations were selected for this study i.e. Jalan Sultan and Jalan Barat. The key findings obtained in this study is operating speed was reduced at both locations after the installation of TRS. The speed compliancy rate was also increased with the presence of TRS at both locations. The compliancy was maintained even after 1-week of TRS installation. In evaluating the rate of braking, the higher rate was obtained after 1-day of TRS installation than any other period on both sites. Due to its potential as a countermeasure in reducing or controlling operating speed, it is recommended that TRS is installed at high risk location such as at curve or approaching intersection. However, TRS usage at downhill slope should be further studied or improvised due to the non-significant speed reduction obtained in this study. Precautions should be taken in ensuring that the specifications and materials used for TRS is following the standard and comply with the surface skid resistance value.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81208621","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}
Pub Date : 2019-04-04DOI: 10.19080/cerj.2019.08.555726
P. Aversa
{"title":"Changing Behavior for Energy Saving and Health Indoor Best Practices for Public Administration and School Study Case","authors":"P. Aversa","doi":"10.19080/cerj.2019.08.555726","DOIUrl":"https://doi.org/10.19080/cerj.2019.08.555726","url":null,"abstract":"","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82759672","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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