. Nonlinearity, complexity, and technological limitations are causes of troublesome measurements in multivariate chemical processes. In order to deal with these problems, a soft sensor based on concordance correlation coefficient subsets integrated with parallel inverse-free extreme learning machine (CCCS-PIFELM) is proposed for multivariate chemical processes. In comparison to the forward propagation architecture of neural network with a single hidden layer, i.e., a traditional extreme learning machine (ELM), the CCCS-PIFELM approach has two notable points. Firstly, there are two subsets obtained through the concordance correlation coefficient (CCC) values between input and output variables. Hence, impacts of input variables on output variables can be assessed. Secondly, an inverse-free algorithm is used to reduce the computational load. In the evaluation of the prediction performance, the Tennessee Eastman (TE) benchmark process is employed as a case study to develop the CCCS-PIFELM approach for predicting product compositions. According to the simulation results, the proposed CCCS-PIFELM approach can obtain higher prediction accuracy compared to traditional approaches.
{"title":"Development of a Data-Driven Soft Sensor for Multivariate Chemical Processes Using Concordance Correlation Coefficient Subsets Integrated with Parallel Inverse-Free Extreme Learning Machine","authors":"Thirasit Kusolsongtawee, Soorathep Kheawhom, Sorin Olaru, Pornchai Bumroongsri","doi":"10.4186/ej.2023.27.6.25","DOIUrl":"https://doi.org/10.4186/ej.2023.27.6.25","url":null,"abstract":". Nonlinearity, complexity, and technological limitations are causes of troublesome measurements in multivariate chemical processes. In order to deal with these problems, a soft sensor based on concordance correlation coefficient subsets integrated with parallel inverse-free extreme learning machine (CCCS-PIFELM) is proposed for multivariate chemical processes. In comparison to the forward propagation architecture of neural network with a single hidden layer, i.e., a traditional extreme learning machine (ELM), the CCCS-PIFELM approach has two notable points. Firstly, there are two subsets obtained through the concordance correlation coefficient (CCC) values between input and output variables. Hence, impacts of input variables on output variables can be assessed. Secondly, an inverse-free algorithm is used to reduce the computational load. In the evaluation of the prediction performance, the Tennessee Eastman (TE) benchmark process is employed as a case study to develop the CCCS-PIFELM approach for predicting product compositions. According to the simulation results, the proposed CCCS-PIFELM approach can obtain higher prediction accuracy compared to traditional approaches.","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135142901","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}
. This paper develops a computational method for designing a control system that is an interconnection of transfer functions and multiple decoupled backlash nonlinearities where each backlash is modelled as an uncertain band containing multi-valued functions. The design objective is to ensure that the system outputs and the nonlinearity inputs always stay within their prescribed bounds in the presence of all inputs whose magnitude and whose slope are bounded by respective numbers. By using a known technique, each backlash is decomposed as a linear gain and a bounded disturbance. Essentially, the original design problem is replaced by a surrogate design problem that is related to a linear system and thereby can readily be solved by tools available in previous work. Moreover, as a result of using the convolution algebra A , the method developed here is applicable to rational and nonrational transfer functions. To illustrate the usefulness of the method, linear decentralized controllers are designed for a binary distillation column where valve stiction characteristics are taken into account.
{"title":"Design of Control Systems with Multiple Backlash Nonlinearities Subject to Inputs Restricted in Magnitude and Slope","authors":"Tadchanon Chuman, Suchin Arunsawatwong","doi":"10.4186/ej.2023.27.6.11","DOIUrl":"https://doi.org/10.4186/ej.2023.27.6.11","url":null,"abstract":". This paper develops a computational method for designing a control system that is an interconnection of transfer functions and multiple decoupled backlash nonlinearities where each backlash is modelled as an uncertain band containing multi-valued functions. The design objective is to ensure that the system outputs and the nonlinearity inputs always stay within their prescribed bounds in the presence of all inputs whose magnitude and whose slope are bounded by respective numbers. By using a known technique, each backlash is decomposed as a linear gain and a bounded disturbance. Essentially, the original design problem is replaced by a surrogate design problem that is related to a linear system and thereby can readily be solved by tools available in previous work. Moreover, as a result of using the convolution algebra A , the method developed here is applicable to rational and nonrational transfer functions. To illustrate the usefulness of the method, linear decentralized controllers are designed for a binary distillation column where valve stiction characteristics are taken into account.","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135142614","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}
Nagoor Basha Shaik, Watit Benjapolakul, Widhyakorn Asdornwised, Surachai Chaitusaney, Eyman F. A. Elsmany, Kishore Bingi
{"title":"A Theoretical Approach to Optimize the Pipeline Data Communication in Oil and Gas Remote Locations Using Sky X Technology","authors":"Nagoor Basha Shaik, Watit Benjapolakul, Widhyakorn Asdornwised, Surachai Chaitusaney, Eyman F. A. Elsmany, Kishore Bingi","doi":"10.4186/ej.2023.27.5.29","DOIUrl":"https://doi.org/10.4186/ej.2023.27.5.29","url":null,"abstract":"","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135516956","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}
. This paper considers the input-output stability of a control system that is composed of a linear time-invariant multivariable system interconnecting with multiple decoupled time-invariant memoryless nonlinearities. The objectives of the paper are twofold. First and foremost, we prove (under certain assumptions) that if the multivariable Popov criterion is satisfied, then the system outputs and the nonlinearity inputs are bounded for any exogeneous input having bounded magnitude and bounded slope, and for all the nonlinearities lying in given sector bounds. As a consequence of using the convolution algebra, the obtained result is valid for rational and nonrational transfer functions. Second, for the case in which the transfer functions associated with the Popov criterion are rational functions, we develop a useful inequality for stabilizing the system by numerical methods. This is achieved by means of the positive real lemma and known results on linear matrix inequalities. To illustrate the usefulness of the inequality, a numerical example is provided.
{"title":"Stability of Control Systems with Multiple Sector-Bounded Nonlinearities for Inputs Having Bounded Magnitude and Bounded Slope","authors":"Suchin Arunsawatwon, Tadchanon Chuman","doi":"10.4186/ej.2023.27.5.69","DOIUrl":"https://doi.org/10.4186/ej.2023.27.5.69","url":null,"abstract":". This paper considers the input-output stability of a control system that is composed of a linear time-invariant multivariable system interconnecting with multiple decoupled time-invariant memoryless nonlinearities. The objectives of the paper are twofold. First and foremost, we prove (under certain assumptions) that if the multivariable Popov criterion is satisfied, then the system outputs and the nonlinearity inputs are bounded for any exogeneous input having bounded magnitude and bounded slope, and for all the nonlinearities lying in given sector bounds. As a consequence of using the convolution algebra, the obtained result is valid for rational and nonrational transfer functions. Second, for the case in which the transfer functions associated with the Popov criterion are rational functions, we develop a useful inequality for stabilizing the system by numerical methods. This is achieved by means of the positive real lemma and known results on linear matrix inequalities. To illustrate the usefulness of the inequality, a numerical example is provided.","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135516957","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}
. Organ-on-a-chip allows dynamic microenvironment of the actual organ to be simulated in vitro. In this study, the CFD simulation is used to investigate the behaviors of fluid flow and shear stress due to the effect of a transversely deforming membrane caused by the cyclic deformation of the microchannel sidewalls in a gut-on-a-chip device. The result reveals that the shear stress varies linearly along the length of the microchannel. The average shear stress per cycle is approximately three times greater than that of the stationary microchannel. The amplitude and frequency of the cyclic deformation also significantly affect the flow and shear stress behaviors. The highly dynamic shear stress in the gut-on-a-chip device could be one of the major factors that makes this kind of device more viable than the traditional static cell culture.
{"title":"CFD Investigation into Influences of a Transversely and Periodically Deforming Microchannel on Shear Stress Behavior in a Gut-on-a-chip Device","authors":"Pannasit Borwornpiyawat, Ekachai Juntasaro, Sasitorn Aueviriyavit, Varangrat Juntasaro, Witsaroot Sripumkhai, Pattaraluck Pattamang, Rattanawan Meananeatra, Kornphimol Kulthong, Ratjika Wongwanakul, Numfon Khemthongcharoen, Panut Bumphenkiattikul, Arthit Vongachariya, Nithi Atthi, Wutthinan Jeamsaksiri","doi":"10.4186/ej.2023.27.5.51","DOIUrl":"https://doi.org/10.4186/ej.2023.27.5.51","url":null,"abstract":". Organ-on-a-chip allows dynamic microenvironment of the actual organ to be simulated in vitro. In this study, the CFD simulation is used to investigate the behaviors of fluid flow and shear stress due to the effect of a transversely deforming membrane caused by the cyclic deformation of the microchannel sidewalls in a gut-on-a-chip device. The result reveals that the shear stress varies linearly along the length of the microchannel. The average shear stress per cycle is approximately three times greater than that of the stationary microchannel. The amplitude and frequency of the cyclic deformation also significantly affect the flow and shear stress behaviors. The highly dynamic shear stress in the gut-on-a-chip device could be one of the major factors that makes this kind of device more viable than the traditional static cell culture.","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135516762","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":"Liquid-Phase Exfoliation of Graphite Using the Serum from Skim Natural Rubber Latex","authors":"Natchanon Jirasitthanit, Panu Danwanichakul","doi":"10.4186/ej.2023.27.5.37","DOIUrl":"https://doi.org/10.4186/ej.2023.27.5.37","url":null,"abstract":"","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135516955","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}
. Surveillance videos provide rich information to identify people; however, they often contain partial facial images that make recognition of the person of interest difficult. The traditional method of partial face recognition uses a database that contains only full-frontal faces, resulting in a reduction in the performance of recognition models when partial face images are presented. In this study, we augmented the database of full-frontal face images and synthesized two-and three-dimensional facial images. We designed a method for partial face recognition from the augmented database. To synthesize the two-dimensional (2D) facial images, we divided the available video images into groups based on their similarity and chose a representative image from each group. Then, we fused each representative image with a full-frontal face image using the scale-invariant feature transform (SIFT) flow, and augmented the original database with the fused images. To design a partial face recognition algorithm, we carefully evaluated the similarity between a set of video images from cameras and an image from the augmented database by counting the number of keypoints given by the SIFT. Compared to competitive baselines, the proposed method of partial face recognition has the highest face recognition rates in four out of six test cases on the widely used ChokePoint dataset, using most subjects (so-called subject group B) in the gallery. The proposed method also has recognition rates of approximately 22% to 72% on the test cases. The 2D face synthesis was found to outperform the three-dimensional (3D) face synthesis on a large subject group, possibly because the method of 2D reconstruction retains important facial features. The methods of augmentation and partial-face recognition are simple and improve the face recognition rate of traditional methods.
{"title":"Face Synthesis and Partial Face Recognition from Multiple Videos","authors":"Warinthorn Nualtim, Watcharapan Suwansantisuk, Pinit Kumhom","doi":"10.4186/ej.2023.27.4.29","DOIUrl":"https://doi.org/10.4186/ej.2023.27.4.29","url":null,"abstract":". Surveillance videos provide rich information to identify people; however, they often contain partial facial images that make recognition of the person of interest difficult. The traditional method of partial face recognition uses a database that contains only full-frontal faces, resulting in a reduction in the performance of recognition models when partial face images are presented. In this study, we augmented the database of full-frontal face images and synthesized two-and three-dimensional facial images. We designed a method for partial face recognition from the augmented database. To synthesize the two-dimensional (2D) facial images, we divided the available video images into groups based on their similarity and chose a representative image from each group. Then, we fused each representative image with a full-frontal face image using the scale-invariant feature transform (SIFT) flow, and augmented the original database with the fused images. To design a partial face recognition algorithm, we carefully evaluated the similarity between a set of video images from cameras and an image from the augmented database by counting the number of keypoints given by the SIFT. Compared to competitive baselines, the proposed method of partial face recognition has the highest face recognition rates in four out of six test cases on the widely used ChokePoint dataset, using most subjects (so-called subject group B) in the gallery. The proposed method also has recognition rates of approximately 22% to 72% on the test cases. The 2D face synthesis was found to outperform the three-dimensional (3D) face synthesis on a large subject group, possibly because the method of 2D reconstruction retains important facial features. The methods of augmentation and partial-face recognition are simple and improve the face recognition rate of traditional methods.","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135771893","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}
. Using the triblock copolymer Pluronic F127 as a surfactant, tetraethyl orthosilicate (TEOS) as a silica source, and hydroxylamine hydrochloride as an amine source, a group of amines-modified mesoporous silica Santa Barbara Amorph-16 (SBA-16) materials with different template withdrawal methods and amine loading concentrations were prepared through sol-gel conditions. The investigation will provide qualitative and quantitative information on amine-modified SBA-16 decoration with a brief overview of the non-destructive analysis methods for advanced materials as adsorbent candidates. Highly ordered mesostructured amine-modified SBA-16 materials were prepared using high-temperature (or calcination) and solvent extraction de-templating methods. Mesostructured amine-modified SBA-16 has been successfully examined using a Synchrotron Radiation Low-Angle X-ray Diffraction (SR-LXRD) instrument for phase identification, Small-Angle Synchrotron X-rays Scattering (SAXS) for identifying structural changes in a porous material, Fourier Transform Infrared (FTIR) for identifying functional groups, Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) elemental analyzer for determining the number of silica, oxygen, and nitrogen elements, and a Specific Surface Area (SSA) analyzer for measuring the specific surface areas. The SR-LXRD and SAXS results demonstrated that the synthesized novel materials were defined unambiguously as a bi-continuous cubic body center Im3m mesostructured. FTIR and SEM-EDS analyses verified that the amine groups were uniformly deposited on the SBA-16 surface. The SSA analyzer results also clarified that the novel materials exhibited ordered and meso-framework amine-modified SBA-16 with a large surface area. Novel materials can be considered high-potential uranium adsorbent candidates. Preliminary adsorption investigations have shown that the amine-modified SBA-16 materials can adsorb uranium in natural seawater showing an uptake capacity of as much as 24.48 mg-U/g-adsorbent.
{"title":"Exploring Qualitative and Quantitative Decoration on Amine-Modified Mesoporous Silica for Enhance Adsorption Performances","authors":"Niken Siwi Pamungkas, Doonyapong Wongsawaeng, Deni Swantomo, Krongthong Kamonsuangkasem, Sirinart Chio-Srichan","doi":"10.4186/ej.2023.27.4.45","DOIUrl":"https://doi.org/10.4186/ej.2023.27.4.45","url":null,"abstract":". Using the triblock copolymer Pluronic F127 as a surfactant, tetraethyl orthosilicate (TEOS) as a silica source, and hydroxylamine hydrochloride as an amine source, a group of amines-modified mesoporous silica Santa Barbara Amorph-16 (SBA-16) materials with different template withdrawal methods and amine loading concentrations were prepared through sol-gel conditions. The investigation will provide qualitative and quantitative information on amine-modified SBA-16 decoration with a brief overview of the non-destructive analysis methods for advanced materials as adsorbent candidates. Highly ordered mesostructured amine-modified SBA-16 materials were prepared using high-temperature (or calcination) and solvent extraction de-templating methods. Mesostructured amine-modified SBA-16 has been successfully examined using a Synchrotron Radiation Low-Angle X-ray Diffraction (SR-LXRD) instrument for phase identification, Small-Angle Synchrotron X-rays Scattering (SAXS) for identifying structural changes in a porous material, Fourier Transform Infrared (FTIR) for identifying functional groups, Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) elemental analyzer for determining the number of silica, oxygen, and nitrogen elements, and a Specific Surface Area (SSA) analyzer for measuring the specific surface areas. The SR-LXRD and SAXS results demonstrated that the synthesized novel materials were defined unambiguously as a bi-continuous cubic body center Im3m mesostructured. FTIR and SEM-EDS analyses verified that the amine groups were uniformly deposited on the SBA-16 surface. The SSA analyzer results also clarified that the novel materials exhibited ordered and meso-framework amine-modified SBA-16 with a large surface area. Novel materials can be considered high-potential uranium adsorbent candidates. Preliminary adsorption investigations have shown that the amine-modified SBA-16 materials can adsorb uranium in natural seawater showing an uptake capacity of as much as 24.48 mg-U/g-adsorbent.","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135771891","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}
. In day-to-day life, people constantly come in contact with pathogens such as bacteria and fungi that can negatively impact human health, causing skin infections and foot-related issues. The aim of this research is to create an easy-to-maintain consumer level product utilizing UV-C to efficiently and effectively disinfect everyday household items to improve hygiene and general quality of life with a shortened time spent, less human labor required . Key design concepts are ‘minimal - design platform’ to keep things minimal and streamlined – highlighting uncomplicated forms plus having been made simpler, and ‘ d esign for maintainability’ to achieve effective building’s performance - system functions in relation to designated criteria, easy-to-maintain, easy-to-access, convenient, and embracing a healthy lifestyle. Besides, the optional mobile application is added to the system for assisting users as a remote communication. The modules are adaptably made to future requirements while maintaining a stable usage cost throughout the building’s design life. For protecting users from UVC radiation leakage or emitted out from the cabinet (0 UVC leakage in the unit of mW/cm 2 measuring by UVC light meter), the polycarbonate sheet is applied as a cover. The efficiency of UV sanitizer cabinet can be evaluated via structural performance (the maximum load that can be supported by rotary table is 1 kg.), bacterial culture test (the number of colonies decrease significantly to < 5%), and reliability of system (99.47%).
{"title":"Developing an Easy-to-Maintain UV Sanitizer Cabinet for Safe and Efficient Disinfection and Improved Hygiene Practices","authors":"Suchada Rianmora, Sothea Seng, Russamalin Intaruk","doi":"10.4186/ej.2023.27.4.1","DOIUrl":"https://doi.org/10.4186/ej.2023.27.4.1","url":null,"abstract":". In day-to-day life, people constantly come in contact with pathogens such as bacteria and fungi that can negatively impact human health, causing skin infections and foot-related issues. The aim of this research is to create an easy-to-maintain consumer level product utilizing UV-C to efficiently and effectively disinfect everyday household items to improve hygiene and general quality of life with a shortened time spent, less human labor required . Key design concepts are ‘minimal - design platform’ to keep things minimal and streamlined – highlighting uncomplicated forms plus having been made simpler, and ‘ d esign for maintainability’ to achieve effective building’s performance - system functions in relation to designated criteria, easy-to-maintain, easy-to-access, convenient, and embracing a healthy lifestyle. Besides, the optional mobile application is added to the system for assisting users as a remote communication. The modules are adaptably made to future requirements while maintaining a stable usage cost throughout the building’s design life. For protecting users from UVC radiation leakage or emitted out from the cabinet (0 UVC leakage in the unit of mW/cm 2 measuring by UVC light meter), the polycarbonate sheet is applied as a cover. The efficiency of UV sanitizer cabinet can be evaluated via structural performance (the maximum load that can be supported by rotary table is 1 kg.), bacterial culture test (the number of colonies decrease significantly to < 5%), and reliability of system (99.47%).","PeriodicalId":11618,"journal":{"name":"Engineering Journal","volume":"260 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135771892","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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