Pub Date : 2023-03-23DOI: 10.11648/j.ijmsa.20231201.14
Jonathan Preitnacher, W. Hansch
{"title":"Comparative Single Photon Time Resolution Measurements of Commercial Silicon-Photomultipliers and a Specially Designed SiPM with High Accuracy in 0.35 µm Technology","authors":"Jonathan Preitnacher, W. Hansch","doi":"10.11648/j.ijmsa.20231201.14","DOIUrl":"https://doi.org/10.11648/j.ijmsa.20231201.14","url":null,"abstract":"","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88475613","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 : 2023-03-16DOI: 10.11648/j.ijmsa.20231201.12
K. Dadmohamadi, Mohsen Mohammadi Achachluei, Mohammad Taghi Jafari
: Consolidation is considered as an important step in the conservation of cultural and historical documents and books and the main purpose is to emphasize the strength of the paper support. Consolidant materials are used in the restoration of paper cultural heritage in order to improve the strength of the paper structure, which has decreased due to the passage of time and also the impact of environmental factors. Paper works are gradually degraded by various destructive factors due to their structural properties. For this reason, it is necessary to applying consolidation treatments for strengthening of degraded paper. The purpose of this research is to evaluate the effect of cellulose nanofibers and its use as a consolidant agent to restore durability to paper works. In this study, to consolidation of the paper, cellulose nanofibers with a concentration of 1% by weight were prepared as a suspension with water and used to treat the samples. In order to evaluate the effect of treatment, the samples were exposed to dry-heat and moist-heat aging and pH, colorimetric, and tensile strength tests were performed before and after aging. The results showed that the pH of the samples increased after treatment with cellulose nanofibers. After dry-heat and moist-heat aging, the pH of the samples decreased slightly. Cellulose nanofiber treatment increased the tensile strength of the samples. However, after two stages of aging, the tensile strength of the samples has decreased compared to the previous stage. The use of cellulose nanofiber treatment made the color of the samples brighter but after aging, the brightness of the samples decreased.
{"title":"Consolidation of the Paper Works with Cellulose Nanofibers","authors":"K. Dadmohamadi, Mohsen Mohammadi Achachluei, Mohammad Taghi Jafari","doi":"10.11648/j.ijmsa.20231201.12","DOIUrl":"https://doi.org/10.11648/j.ijmsa.20231201.12","url":null,"abstract":": Consolidation is considered as an important step in the conservation of cultural and historical documents and books and the main purpose is to emphasize the strength of the paper support. Consolidant materials are used in the restoration of paper cultural heritage in order to improve the strength of the paper structure, which has decreased due to the passage of time and also the impact of environmental factors. Paper works are gradually degraded by various destructive factors due to their structural properties. For this reason, it is necessary to applying consolidation treatments for strengthening of degraded paper. The purpose of this research is to evaluate the effect of cellulose nanofibers and its use as a consolidant agent to restore durability to paper works. In this study, to consolidation of the paper, cellulose nanofibers with a concentration of 1% by weight were prepared as a suspension with water and used to treat the samples. In order to evaluate the effect of treatment, the samples were exposed to dry-heat and moist-heat aging and pH, colorimetric, and tensile strength tests were performed before and after aging. The results showed that the pH of the samples increased after treatment with cellulose nanofibers. After dry-heat and moist-heat aging, the pH of the samples decreased slightly. Cellulose nanofiber treatment increased the tensile strength of the samples. However, after two stages of aging, the tensile strength of the samples has decreased compared to the previous stage. The use of cellulose nanofiber treatment made the color of the samples brighter but after aging, the brightness of the samples decreased.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73418448","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 : 2023-03-16DOI: 10.11648/j.ijmsa.20231201.13
Xiaosen Wang, Zhibin Wang, Haidong Li, Shaobo Zhang, Yang Luan
: The high temperature performance of asphalt mixture is an important factor to determine pavement life. Through rut test, dynamic modulus test and repeated load creep test, the high-temperature properties of two kinds of SMA asphalt mixtures were compared by different indexes, and the performance characteristics of non-fiber SMA asphalt mixtures were evaluated. The dynamic stability of the mixture and the slope of the creep curve showed that the non-fiber SMA mixture had an advantage in rut development rate compared with ordinary SMA. The estimated road life and flow number Fn based on rutting showed that the non-fiber SMA mixture could bear nearly 80% more standard axle load than the normal SMA flow number Fn by 11%. When the permanent deformation of the mixture reaches the failure stage, the non-fiber SMA can bear more loads. The main curves of dynamic moduli of the two SMA mixtures at different reference temperatures are basically the same, and the dynamic moduli characterizing the mechanical properties of the mixtures have little difference. Compared with ordinary SMA mixture, the asphalt film thickness on the surface of non-fiber SMA mixture is thinner, and the skeleton effect between coarse aggregates is more prominent, which is an important reason for the improvement of high temperature stability of the mixture.
{"title":"Study on High Temperature Properties of Fiber-Free SMA Mixture","authors":"Xiaosen Wang, Zhibin Wang, Haidong Li, Shaobo Zhang, Yang Luan","doi":"10.11648/j.ijmsa.20231201.13","DOIUrl":"https://doi.org/10.11648/j.ijmsa.20231201.13","url":null,"abstract":": The high temperature performance of asphalt mixture is an important factor to determine pavement life. Through rut test, dynamic modulus test and repeated load creep test, the high-temperature properties of two kinds of SMA asphalt mixtures were compared by different indexes, and the performance characteristics of non-fiber SMA asphalt mixtures were evaluated. The dynamic stability of the mixture and the slope of the creep curve showed that the non-fiber SMA mixture had an advantage in rut development rate compared with ordinary SMA. The estimated road life and flow number Fn based on rutting showed that the non-fiber SMA mixture could bear nearly 80% more standard axle load than the normal SMA flow number Fn by 11%. When the permanent deformation of the mixture reaches the failure stage, the non-fiber SMA can bear more loads. The main curves of dynamic moduli of the two SMA mixtures at different reference temperatures are basically the same, and the dynamic moduli characterizing the mechanical properties of the mixtures have little difference. Compared with ordinary SMA mixture, the asphalt film thickness on the surface of non-fiber SMA mixture is thinner, and the skeleton effect between coarse aggregates is more prominent, which is an important reason for the improvement of high temperature stability of the mixture.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74020534","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 Rheological Model with Integer and Non-Integer Orders Nonlinearities for Predicting Stress Relaxation Behavior in Viscoelastic Materials","authors":"Yélomè Judicaël Fernando Kpomahou, Koffi Judicaël Agbélélé, Arnaud Edouard Yamadjako, Bachir Koladé Adélakoun Ambelohoun","doi":"10.11648/j.ijmsa.20231201.11","DOIUrl":"https://doi.org/10.11648/j.ijmsa.20231201.11","url":null,"abstract":"","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90775098","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 : 2023-01-17DOI: 10.11648/j.ijmsa.20221106.12
Olusola Samuel Areo, Ayodeji Oludare Omole, Adewale Lukeman Adejoba, Ifedayo Micheal Adeniyi, Oyewumi Omolade Racheal, Samuel Olubori Afolabi
{"title":"An Investigation into the Strength Properties of Three Reclaimed Structural Timber Joist Within the University of Ibadan Community","authors":"Olusola Samuel Areo, Ayodeji Oludare Omole, Adewale Lukeman Adejoba, Ifedayo Micheal Adeniyi, Oyewumi Omolade Racheal, Samuel Olubori Afolabi","doi":"10.11648/j.ijmsa.20221106.12","DOIUrl":"https://doi.org/10.11648/j.ijmsa.20221106.12","url":null,"abstract":"","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84335445","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 : 2022-11-15DOI: 10.32732/jma.2022.11.2.58
S. Kim, Sung-Kug Hwang, Joon Hyub Kim, S. Ryu
The humidifier vibrator housing is difficult to clean and prone to contamination due to its metallic material. To overcome these shortcomings, the humidifier vibrator housing was manufactured using Hydroxyapatite as a raw material. Although hydroxyapatite has excellent antibacterial properties and biocompatibility, it is difficult to manufacture a sintered body due to its weak fracture toughness. Therefore, hydroxyapatite sintered compacts were prepared according to the amount of plasticizer added and their physical properties were compared. The average compressive strength was 395.1 N·mm-2 at 8 % of the amount of added plasticizer, and the average bending strength was 61.8 N·mm-2 at 6 % of the amount of added plasticizer. The hydroxyapatite sintered compact showed the effect of inhibiting the production of bacteria regardless of the amount of plasticizer added. As a result of this physical property study, it was possible to develop a humidifier vibrator housing with excellent antibacterial properties and maintaining mechanical strength.
{"title":"Hydroxyapatite Humidifier Vibrator Housing Fabrication and Characteristics","authors":"S. Kim, Sung-Kug Hwang, Joon Hyub Kim, S. Ryu","doi":"10.32732/jma.2022.11.2.58","DOIUrl":"https://doi.org/10.32732/jma.2022.11.2.58","url":null,"abstract":"The humidifier vibrator housing is difficult to clean and prone to contamination due to its metallic material. To overcome these shortcomings, the humidifier vibrator housing was manufactured using Hydroxyapatite as a raw material. Although hydroxyapatite has excellent antibacterial properties and biocompatibility, it is difficult to manufacture a sintered body due to its weak fracture toughness. Therefore, hydroxyapatite sintered compacts were prepared according to the amount of plasticizer added and their physical properties were compared. The average compressive strength was 395.1 N·mm-2 at 8 % of the amount of added plasticizer, and the average bending strength was 61.8 N·mm-2 at 6 % of the amount of added plasticizer. The hydroxyapatite sintered compact showed the effect of inhibiting the production of bacteria regardless of the amount of plasticizer added. As a result of this physical property study, it was possible to develop a humidifier vibrator housing with excellent antibacterial properties and maintaining mechanical strength.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84099063","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 : 2022-05-15DOI: 10.32732/jma.2022.11.1.17
Mamoru Takahashi, T. Fujita, Takahito Yanagi, R. Suzuki, O. Kamiya
The flame combustion method enables the synthesis of diamonds via acetylene-oxygen gas flame combustion in ambient air, and this method has various advantages over other methods. However, most diamond films synthesized by this method delaminate because of thermal stress during cooling. Titanium (Ti) has recently been utilized as a dental implant in the dental industry. In this study, to improve the strength, wear resistance, and biocompatibility of dental implant surfaces, diamond films were synthesized on a Ti substrate, a dental implant material, by the flame combustion method. Moreover, to obtain high-quality diamond films and achieve good adhesion on the Ti substrate, as a pretreatment of the substrate to prevent delamination, scratch processing, in which a substrate is ground with emery paper in one direction, was performed to roughen the surface. The surface roughness of the Ti substrates was varied by scratching with emery paper of #180, #400, and #1500 grain sizes. According to these results, diamond films were synthesized on the Ti substrate surface by flame combustion. The surface morphology of the synthesized films could be altered by varying the scratching process using emery paper. Delamination of the synthesized films during the scratching process with emery paper #180 (Case A) and #400 (Case B) grain size was completely prevented. However, delamination occurred during the scratching process with a grain size of emery paper #1500 (Case C). To investigate the reason for this result, the surface roughness of the pretreated Ti substrate was observed, and it affected the surface roughness of pretreated Ti substrate affected the surface morphology and delamination of the synthesized diamond films.
{"title":"Influence of Substrate Surface Roughness on Synthesized Diamond Films by Flame Combustion on Ti Substrate for Dental Implants","authors":"Mamoru Takahashi, T. Fujita, Takahito Yanagi, R. Suzuki, O. Kamiya","doi":"10.32732/jma.2022.11.1.17","DOIUrl":"https://doi.org/10.32732/jma.2022.11.1.17","url":null,"abstract":"The flame combustion method enables the synthesis of diamonds via acetylene-oxygen gas flame combustion in ambient air, and this method has various advantages over other methods. However, most diamond films synthesized by this method delaminate because of thermal stress during cooling. Titanium (Ti) has recently been utilized as a dental implant in the dental industry. In this study, to improve the strength, wear resistance, and biocompatibility of dental implant surfaces, diamond films were synthesized on a Ti substrate, a dental implant material, by the flame combustion method. Moreover, to obtain high-quality diamond films and achieve good adhesion on the Ti substrate, as a pretreatment of the substrate to prevent delamination, scratch processing, in which a substrate is ground with emery paper in one direction, was performed to roughen the surface. The surface roughness of the Ti substrates was varied by scratching with emery paper of #180, #400, and #1500 grain sizes. According to these results, diamond films were synthesized on the Ti substrate surface by flame combustion. The surface morphology of the synthesized films could be altered by varying the scratching process using emery paper. Delamination of the synthesized films during the scratching process with emery paper #180 (Case A) and #400 (Case B) grain size was completely prevented. However, delamination occurred during the scratching process with a grain size of emery paper #1500 (Case C). To investigate the reason for this result, the surface roughness of the pretreated Ti substrate was observed, and it affected the surface roughness of pretreated Ti substrate affected the surface morphology and delamination of the synthesized diamond films.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83091290","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 : 2022-05-15DOI: 10.32732/jma.2022.11.1.10
S. Bessaleh, S. Jebahi, Rachida Abbassi, Safa Ben Belgecem, A. Faraz
Biodegradable films from gelatin (Gn) with various date by-product (DBP) concentrations (1, 2, 3 and 4 wt %) were prepared. Elaborated films were examined in terms of physical properties (thickness, density, water solubility, water content, degree of swelling, color), and antimicrobial properties (Escherichia coli and Staphylcoccus aureus). Adding the highest concentration of DBP (4%), resulted an increase in the WHC of film as compared with control film. Moreover, the incorporation of 1% DBP reduced the moisture level of Gn based composite films as compared with the control film. Furthermore, Film with 4% of DBP had the lowest solubility which reached 39.39%. Incorporation of DBP from 1 to 4% showed decrease of L- and a-values. The active Gn-DBP 1% showed less lightness as compared to Gn-DBP 3%. The incorporation of DBP into film-forming solutions led to increased opaqueness for all gelatin-based composite films. The calculated opacity value was inversely proportional to transparency. Moreover, the Active Gn-DBP 1% and 2% film presented effective antibacterial activity against bacteria such as Staphylococcus aureus and Escherichia coli. The results showed an enhancement in the biodegradability of Gn-DBP films in moist soil. The results reveal the benefits of date by-products incorporated into gelatin based films as a potential material for active food packaging.
{"title":"Bioactive Gelatin-based Date By-Product for Packaging Applications: Physico-Chemical and Biological Characterization","authors":"S. Bessaleh, S. Jebahi, Rachida Abbassi, Safa Ben Belgecem, A. Faraz","doi":"10.32732/jma.2022.11.1.10","DOIUrl":"https://doi.org/10.32732/jma.2022.11.1.10","url":null,"abstract":" Biodegradable films from gelatin (Gn) with various date by-product (DBP) concentrations (1, 2, 3 and 4 wt %) were prepared. Elaborated films were examined in terms of physical properties (thickness, density, water solubility, water content, degree of swelling, color), and antimicrobial properties (Escherichia coli and Staphylcoccus aureus). Adding the highest concentration of DBP (4%), resulted an increase in the WHC of film as compared with control film. Moreover, the incorporation of 1% DBP reduced the moisture level of Gn based composite films as compared with the control film. Furthermore, Film with 4% of DBP had the lowest solubility which reached 39.39%. Incorporation of DBP from 1 to 4% showed decrease of L- and a-values. The active Gn-DBP 1% showed less lightness as compared to Gn-DBP 3%. The incorporation of DBP into film-forming solutions led to increased opaqueness for all gelatin-based composite films. The calculated opacity value was inversely proportional to transparency. Moreover, the Active Gn-DBP 1% and 2% film presented effective antibacterial activity against bacteria such as Staphylococcus aureus and Escherichia coli. The results showed an enhancement in the biodegradability of Gn-DBP films in moist soil. The results reveal the benefits of date by-products incorporated into gelatin based films as a potential material for active food packaging. ","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88192811","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 : 2022-05-15DOI: 10.32732/jma.2022.11.1.1
O. Kamiya, Mamoru Takahashi, Y. Miyano, S. Ito, Kenji Murata, M. Kawano, Arata Maisawa, Junpei Nanao, Takashi Kazumi, M. Nakatsu, H. Mizuma, Y. Iwama
The authors developed an environment-friendly demolition mechanical system for a large reinforced concrete structure for an actual site. The steam pressure cracking agent (SPC, non-explosive) is a method that can safely and quickly separate concrete because it produces lesser vibration and sound than the blasting method, which uses explosives. The authors showed that the direction of cracking can be controlled by an induction hole. The principle of control is that the elastic wave of the compression stress generated from the SPC reaction changes to a tensile elastic wave at the induction hole, which initiates a crack. Furthermore, in the SPC method, a large amount of concrete powder generated by the explosion method was not produced, and there was no risk of secondary contamination by fine concrete powder. The area over which the crack propagated depends on the energy generated from the SPC. The relationship between the two is linear. For reinforced concrete, the energy of the SPC is used for both the destructive energy of the concrete and the energy of the cutting of the reinforcing steel bar, which quickly breaks with low energy. By applying an SPC to dismantle large reinforced concrete structures, controlled cracking can be achieved safely and quickly without any environmental pollution. A fracturing method using a SPC is an effective method for the decommissioning of nuclear power plants and the dismantling of concrete structures. In this report, we report a remote drilling system that can be used to remotely install loading holes and guiding holes for the SPC and perform effective controlled fracturing.
{"title":"Demolition of Reinforced Concrete by Steam Pressure Cracking System","authors":"O. Kamiya, Mamoru Takahashi, Y. Miyano, S. Ito, Kenji Murata, M. Kawano, Arata Maisawa, Junpei Nanao, Takashi Kazumi, M. Nakatsu, H. Mizuma, Y. Iwama","doi":"10.32732/jma.2022.11.1.1","DOIUrl":"https://doi.org/10.32732/jma.2022.11.1.1","url":null,"abstract":"The authors developed an environment-friendly demolition mechanical system for a large reinforced concrete structure for an actual site. The steam pressure cracking agent (SPC, non-explosive) is a method that can safely and quickly separate concrete because it produces lesser vibration and sound than the blasting method, which uses explosives. The authors showed that the direction of cracking can be controlled by an induction hole. The principle of control is that the elastic wave of the compression stress generated from the SPC reaction changes to a tensile elastic wave at the induction hole, which initiates a crack. Furthermore, in the SPC method, a large amount of concrete powder generated by the explosion method was not produced, and there was no risk of secondary contamination by fine concrete powder. The area over which the crack propagated depends on the energy generated from the SPC. The relationship between the two is linear. For reinforced concrete, the energy of the SPC is used for both the destructive energy of the concrete and the energy of the cutting of the reinforcing steel bar, which quickly breaks with low energy. By applying an SPC to dismantle large reinforced concrete structures, controlled cracking can be achieved safely and quickly without any environmental pollution. A fracturing method using a SPC is an effective method for the decommissioning of nuclear power plants and the dismantling of concrete structures. In this report, we report a remote drilling system that can be used to remotely install loading holes and guiding holes for the SPC and perform effective controlled fracturing.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75920613","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：