Preliminary hazard analysis (PHA) is a key safetyconcerned activity to identify potential hazards. However, since various stakeholders will be involved in the identification process, a common understanding of the nature of hazards among stakeholders, such as what a hazard consists of and how to describe it without ambiguities, is of crucial importance to achieve the goal of PHA. In this work, we propose a hazard modeling language (HML) based on a domain ontology to facilitate the specification of identified hazards. In addition, we present an approach to guide the transformation from natural language hazard descriptions into the HML specification. Finally, an industrial PHA example is used to illustrate the usefulness of our work.
{"title":"A Hazard Modeling Language for Safety-Critical Systems Based on the Hazard Ontology","authors":"Jiale Zhou, Kaj Hänninen, K. Lundqvist","doi":"10.1109/SEAA.2017.48","DOIUrl":"https://doi.org/10.1109/SEAA.2017.48","url":null,"abstract":"Preliminary hazard analysis (PHA) is a key safetyconcerned activity to identify potential hazards. However, since various stakeholders will be involved in the identification process, a common understanding of the nature of hazards among stakeholders, such as what a hazard consists of and how to describe it without ambiguities, is of crucial importance to achieve the goal of PHA. In this work, we propose a hazard modeling language (HML) based on a domain ontology to facilitate the specification of identified hazards. In addition, we present an approach to guide the transformation from natural language hazard descriptions into the HML specification. Finally, an industrial PHA example is used to illustrate the usefulness of our work.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115704760","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}
Context: Facing the implementation of the EU General Data Protection Regulation in May 2018, many commercial software providers will soon need to adapt their products to new privacy-related constraints. Privacy patterns defined for different aspects of the software engineering process promise to be a useful concept for this task. In this situation, it seems valuable to characterize the state of the research related to privacy patterns.Objective: To identify, characterize and classify the contributions made by published research results related to patterns in the context of considering privacy concerns in engineering software. Method: A literature review in form of a mapping study of scientific articles was performed. The resulting map structures the relevant body of work into multiple dimensions, illustrating research focuses and gaps.Results: Results show that empirical evidence in this field is scarce and that holistic approaches to engineering privacy into software based on patterns are lacking. This potentially hinders industrial adoption.Conclusion: Based on these results, we recommend to empirically validate existing privacy patterns, to consolidate them in pattern catalogues and languages, and to move towards seamless approaches from engineering privacy requirements to implementation.
{"title":"A Literature Study on Privacy Patterns Research","authors":"Jörg Lenhard, Lothar Fritsch, Sebastian Herold","doi":"10.1109/SEAA.2017.28","DOIUrl":"https://doi.org/10.1109/SEAA.2017.28","url":null,"abstract":"Context: Facing the implementation of the EU General Data Protection Regulation in May 2018, many commercial software providers will soon need to adapt their products to new privacy-related constraints. Privacy patterns defined for different aspects of the software engineering process promise to be a useful concept for this task. In this situation, it seems valuable to characterize the state of the research related to privacy patterns.Objective: To identify, characterize and classify the contributions made by published research results related to patterns in the context of considering privacy concerns in engineering software. Method: A literature review in form of a mapping study of scientific articles was performed. The resulting map structures the relevant body of work into multiple dimensions, illustrating research focuses and gaps.Results: Results show that empirical evidence in this field is scarce and that holistic approaches to engineering privacy into software based on patterns are lacking. This potentially hinders industrial adoption.Conclusion: Based on these results, we recommend to empirically validate existing privacy patterns, to consolidate them in pattern catalogues and languages, and to move towards seamless approaches from engineering privacy requirements to implementation.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114451683","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}
Hirohisa Aman, S. Amasaki, Tomoyuki Yokogawa, Minoru Kawahara
This paper focuses on comments written in source programs. While comments can work for improving the readability of code, i.e., the quality of programs, there have also been concerns thatcomments can be added for complicated source code in order to compensate for a lack of readability. That is to say, well-written comments might be associated with problematic parts to be refactored. This paper collected Java methods (programs) from six popular open source products, and performs analyses on words which appear in their comments. Then, the paper shows that a method having a longer comments (more words)tends to be more change-prone and would be required more fixes after their releases.
{"title":"Empirical Analysis of Words in Comments Written for Java Methods","authors":"Hirohisa Aman, S. Amasaki, Tomoyuki Yokogawa, Minoru Kawahara","doi":"10.1109/SEAA.2017.23","DOIUrl":"https://doi.org/10.1109/SEAA.2017.23","url":null,"abstract":"This paper focuses on comments written in source programs. While comments can work for improving the readability of code, i.e., the quality of programs, there have also been concerns thatcomments can be added for complicated source code in order to compensate for a lack of readability. That is to say, well-written comments might be associated with problematic parts to be refactored. This paper collected Java methods (programs) from six popular open source products, and performs analyses on words which appear in their comments. Then, the paper shows that a method having a longer comments (more words)tends to be more change-prone and would be required more fixes after their releases.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116173746","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}
Context: Software Bug Severity Classification can help to improve the software bug triaging process. However, severity levels present a high-level of data imbalance that needs to be taken into account. Aim: We investigate cost-sensitive strategies in multi-class bug severity classification to counteract data imbalance. Method: We transform datasets from three severity classification papers to a common format, totaling 17 projects. We test different cost sensitive strategies to penalize majority classes. We adopt a Support Vector Machine (SVM) classifier that we also compare to a baseline "majority class" classifier. Results: A model weighting classes based on the inverse of instance frequencies yields a statistically significant improvement (low effect size) over the standard unweighted SVM model in the assembled dataset. Conclusions: Data imbalance should be taken more into consideration in future severity classification research papers.
{"title":"Cost-Sensitive Strategies for Data Imbalance in Bug Severity Classification: Experimental Results","authors":"Nivir Kanti Singha Roy, B. Rossi","doi":"10.1109/SEAA.2017.71","DOIUrl":"https://doi.org/10.1109/SEAA.2017.71","url":null,"abstract":"Context: Software Bug Severity Classification can help to improve the software bug triaging process. However, severity levels present a high-level of data imbalance that needs to be taken into account. Aim: We investigate cost-sensitive strategies in multi-class bug severity classification to counteract data imbalance. Method: We transform datasets from three severity classification papers to a common format, totaling 17 projects. We test different cost sensitive strategies to penalize majority classes. We adopt a Support Vector Machine (SVM) classifier that we also compare to a baseline \"majority class\" classifier. Results: A model weighting classes based on the inverse of instance frequencies yields a statistically significant improvement (low effect size) over the standard unweighted SVM model in the assembled dataset. Conclusions: Data imbalance should be taken more into consideration in future severity classification research papers.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125265283","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}
Matthias Geisriegler, Maksym Kolodiy, S. Stani, Robert Singer
In this work, we present a proposal for a reference architecture for the modeling and execution of business processes. We define business processes following the subject-oriented business process management (S-BPM) methodology, which recently has been amalgamated in a Web Ontology Language (OWL) definition. Consequently, all created process definitions are serialized as OWL files. The S-BPM approach understands business processes as a network of distributed and independent actors (human or machine) which interact via the exchange of messages. The proposed architecture is therefore designed as a collection of microservices. All concepts have been realized as a prototypical software application (modeling and execution of business processes) for reference and further research. It is proved that the generated OWL business process models can be executed on the developed workflow engine.
{"title":"Actor Based Business Process Modeling and Execution: A Reference Implementation Based on Ontology Models and Microservices","authors":"Matthias Geisriegler, Maksym Kolodiy, S. Stani, Robert Singer","doi":"10.1109/SEAA.2017.39","DOIUrl":"https://doi.org/10.1109/SEAA.2017.39","url":null,"abstract":"In this work, we present a proposal for a reference architecture for the modeling and execution of business processes. We define business processes following the subject-oriented business process management (S-BPM) methodology, which recently has been amalgamated in a Web Ontology Language (OWL) definition. Consequently, all created process definitions are serialized as OWL files. The S-BPM approach understands business processes as a network of distributed and independent actors (human or machine) which interact via the exchange of messages. The proposed architecture is therefore designed as a collection of microservices. All concepts have been realized as a prototypical software application (modeling and execution of business processes) for reference and further research. It is proved that the generated OWL business process models can be executed on the developed workflow engine.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125478240","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}
The EMFIS model allows companies to explicate a representation of the organization's current situation regarding continuous integration impediments, and visualizes what the organization must focus on in order to enable more frequent integration of software. The model is used to perform an assessment of twelve factors, where the ratings from participants representing the developers are summarized separately from ratings from participants representing the enablers (responsible for processes, development tools, test environments etc.). The EMFIS model is based on semi-structured interviews with 20 developers from two companies which develop large-scale software systems, and a literature review that included 74 research papers and four books. The model has been validated in workshops and interviews, which in total included 28 individuals in five different companies. The model was well received during the validation, and was appreciated for its simplicity and its ability to show differences in rating between developers and enablers.
{"title":"The EMFIS Model — Enable More Frequent Integration of Software","authors":"Torvald Mårtensson, Daniel Ståhl, J. Bosch","doi":"10.1109/SEAA.2017.31","DOIUrl":"https://doi.org/10.1109/SEAA.2017.31","url":null,"abstract":"The EMFIS model allows companies to explicate a representation of the organization's current situation regarding continuous integration impediments, and visualizes what the organization must focus on in order to enable more frequent integration of software. The model is used to perform an assessment of twelve factors, where the ratings from participants representing the developers are summarized separately from ratings from participants representing the enablers (responsible for processes, development tools, test environments etc.). The EMFIS model is based on semi-structured interviews with 20 developers from two companies which develop large-scale software systems, and a literature review that included 74 research papers and four books. The model has been validated in workshops and interviews, which in total included 28 individuals in five different companies. The model was well received during the validation, and was appreciated for its simplicity and its ability to show differences in rating between developers and enablers.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123456929","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}
Leilane Ferreira Ribeiro, N. S. R. Alves, Manoel G. Mendonça, R. Spínola
Technical debt (TD) refers to likely long-term costs associated with software development shortcuts taken by programmers to achieve short-term business benefits. If a development team does not manage TD, it can cause significant long-term problems such as high maintenance costs. Management strategies monitor debt items and evaluate when and if they should be paid. In order to effectively support this task, the systematic use of decision criteria can be decisive. In this context, this paper presents a strategy for TD management that uses multiple decision criteria to decide when to pay debt items off. In addition, it presents a case study that assessed the feasibility of the proposed strategy regarding its usefulness, ease of use and self-predicted future use. The results provided positive evidence on the use of the proposed strategy, indicating (i) that it can be useful in supporting TD management activities and (ii) that it can bring gains in terms of productivity, performance, and efficacy when evaluating the desirable time to pay debt items off.
{"title":"A Strategy Based on Multiple Decision Criteria to Support Technical Debt Management","authors":"Leilane Ferreira Ribeiro, N. S. R. Alves, Manoel G. Mendonça, R. Spínola","doi":"10.1109/SEAA.2017.37","DOIUrl":"https://doi.org/10.1109/SEAA.2017.37","url":null,"abstract":"Technical debt (TD) refers to likely long-term costs associated with software development shortcuts taken by programmers to achieve short-term business benefits. If a development team does not manage TD, it can cause significant long-term problems such as high maintenance costs. Management strategies monitor debt items and evaluate when and if they should be paid. In order to effectively support this task, the systematic use of decision criteria can be decisive. In this context, this paper presents a strategy for TD management that uses multiple decision criteria to decide when to pay debt items off. In addition, it presents a case study that assessed the feasibility of the proposed strategy regarding its usefulness, ease of use and self-predicted future use. The results provided positive evidence on the use of the proposed strategy, indicating (i) that it can be useful in supporting TD management activities and (ii) that it can bring gains in terms of productivity, performance, and efficacy when evaluating the desirable time to pay debt items off.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115050860","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}
Modern cyber-physical systems (CPS) often involve distributed devices/components that closely interact with each other and their environment. In this context, operation conditions may constantly change and it is not always possible to guarantee quality of service (QoS), particularly, if resourcesdegrade or stop being available. In addition, sometimes, one would like QoS to scale up/down with operation conditions, e.g., maximize efficiency, minimize energy consumption, etc. without compromising safety. However, traditional design and development techniques fail to capture the dynamics of modern CPS, since they rather focus on individual components/devices, and are unable to provide such QoS guarantees. To overcome this problem, we propose a design methodology based on the concept of ensemble, i.e., a dynamic grouping of components, which allows for scalable QoS guaranties. We illustrate the utility of our approach based on a case study consisting of an intelligent production line and analyze the effect on performance as communication between components degrades. Finally, our methodology can be incorporated into existing ensemble-based tools such as DEECo, Helena or jRESP to generate executable code to be deployed onto distributed devices.
{"title":"An Ensemble-Based Approach for Scalable QoS in Highly Dynamic CPS","authors":"V. Matena, Alejandro Masrur, T. Bures","doi":"10.1109/SEAA.2017.62","DOIUrl":"https://doi.org/10.1109/SEAA.2017.62","url":null,"abstract":"Modern cyber-physical systems (CPS) often involve distributed devices/components that closely interact with each other and their environment. In this context, operation conditions may constantly change and it is not always possible to guarantee quality of service (QoS), particularly, if resourcesdegrade or stop being available. In addition, sometimes, one would like QoS to scale up/down with operation conditions, e.g., maximize efficiency, minimize energy consumption, etc. without compromising safety. However, traditional design and development techniques fail to capture the dynamics of modern CPS, since they rather focus on individual components/devices, and are unable to provide such QoS guarantees. To overcome this problem, we propose a design methodology based on the concept of ensemble, i.e., a dynamic grouping of components, which allows for scalable QoS guaranties. We illustrate the utility of our approach based on a case study consisting of an intelligent production line and analyze the effect on performance as communication between components degrades. Finally, our methodology can be incorporated into existing ensemble-based tools such as DEECo, Helena or jRESP to generate executable code to be deployed onto distributed devices.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132430710","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}
W. Santos, J. A. O. G. Cunha, H. Moura, T. Margaria
Context: Several research works emphasise that the concept of simplicity is, in itself, by far not a simple concept, mainly because there are many perspectives on the perception of simplicity. Purpose: To understand how project managers and software engineers interpret their experiences in agile software projects considering the simplicity issues in agile software development. Method: Semi-structured interviews were carried out with practitioners within a software development company. The data was analysed using grounded theory techniques. Results: A set of categories (lightweight process, knowledge acquisition, personal communication, time-consuming, and product with value) that affect the simplicity in agile software development were extracted. Finally, the categories and propositions with higher explanatory power were used to create a provisional theory about simplicity in agile software projects. Conclusion: The results show that a better understanding of the implications of simplicity on agile software development may contribute to the projects' successes.
{"title":"Towards a Theory of Simplicity in Agile Software Development: A Qualitative Study","authors":"W. Santos, J. A. O. G. Cunha, H. Moura, T. Margaria","doi":"10.1109/SEAA.2017.38","DOIUrl":"https://doi.org/10.1109/SEAA.2017.38","url":null,"abstract":"Context: Several research works emphasise that the concept of simplicity is, in itself, by far not a simple concept, mainly because there are many perspectives on the perception of simplicity. Purpose: To understand how project managers and software engineers interpret their experiences in agile software projects considering the simplicity issues in agile software development. Method: Semi-structured interviews were carried out with practitioners within a software development company. The data was analysed using grounded theory techniques. Results: A set of categories (lightweight process, knowledge acquisition, personal communication, time-consuming, and product with value) that affect the simplicity in agile software development were extracted. Finally, the categories and propositions with higher explanatory power were used to create a provisional theory about simplicity in agile software projects. Conclusion: The results show that a better understanding of the implications of simplicity on agile software development may contribute to the projects' successes.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133961745","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}
Aleksander Fabijan, Pavel A. Dmitriev, H. H. Olsson, J. Bosch
Online controlled experiments (for example A/B tests) are increasingly being performed to guide product development and accelerate innovation in online software product companies. The benefits of controlled experiments have been shown in many cases with incremental product improvement as the objective. In this paper, we demonstrate that the value of controlled experimentation at scale extends beyond this recognized scenario. Based on an exhaustive and collaborative case study in a large software-intensive company with highly developed experimentation culture, we inductively derive the benefits of controlled experimentation. The contribution of our paper is twofold. First, we present a comprehensive list of benefits and illustrate our findings with five case examples of controlled experiments conducted at Microsoft. Second, we provide guidance on how to achieve each of the benefits. With our work, we aim to provide practitioners in the online domain with knowledge on how to use controlled experimentation to maximize the benefits on the portfolio, product and team level.
{"title":"The Benefits of Controlled Experimentation at Scale","authors":"Aleksander Fabijan, Pavel A. Dmitriev, H. H. Olsson, J. Bosch","doi":"10.1109/SEAA.2017.47","DOIUrl":"https://doi.org/10.1109/SEAA.2017.47","url":null,"abstract":"Online controlled experiments (for example A/B tests) are increasingly being performed to guide product development and accelerate innovation in online software product companies. The benefits of controlled experiments have been shown in many cases with incremental product improvement as the objective. In this paper, we demonstrate that the value of controlled experimentation at scale extends beyond this recognized scenario. Based on an exhaustive and collaborative case study in a large software-intensive company with highly developed experimentation culture, we inductively derive the benefits of controlled experimentation. The contribution of our paper is twofold. First, we present a comprehensive list of benefits and illustrate our findings with five case examples of controlled experiments conducted at Microsoft. Second, we provide guidance on how to achieve each of the benefits. With our work, we aim to provide practitioners in the online domain with knowledge on how to use controlled experimentation to maximize the benefits on the portfolio, product and team level.","PeriodicalId":151513,"journal":{"name":"2017 43rd Euromicro Conference on Software Engineering and Advanced Applications (SEAA)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134638968","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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