Internet of Things and Cyber-Physical Systems最新文献

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Smart Healthy Schools: An IoT-enabled concept for multi-room dynamic air quality control 智能健康学校:基于物联网的多房间动态空气质量控制概念
Internet of Things and Cyber-Physical Systems Pub Date : 2023-05-31 DOI: 10.1016/j.iotcps.2023.05.005
Alessandro Zivelonghi , Alessandro Giuseppi
{"title":"Smart Healthy Schools: An IoT-enabled concept for multi-room dynamic air quality control","authors":"Alessandro Zivelonghi ,&nbsp;Alessandro Giuseppi","doi":"10.1016/j.iotcps.2023.05.005","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.05.005","url":null,"abstract":"<div><p>Smart Healthy Schools (SHS) are a new paradigm in building engineering and infection risk control in school buildings where the disciplines of Indoor Air Quality (IAQ), IoT (Internet of Things) and Artificial Intelligence (AI) merge together. In the post-pandemic era, equipping schools with a network of smart IoT sensors has become critical to aspire for the optimal control of the IAQ and lowering the airborne infection risk of several pathogens, indirectly related to cumulated human emitted CO<sub>2</sub> levels over time. Thermal energy waste in winter due to improved air renewal remains of major concern but can be well monitored within a SHS monitoring architecture thanks to the flexibility of the LoRaWAN protocol able to process also a large amount of energy and climatic data at room and building scale. In this work, we report the design of the AulaSicura platform, an IoT control system co-designed by the main author and Gizero Energie to implement the SHS paradigm via clearly visible (and audible) alarm signalling in existing and new school buildings. The cloud-based LoRa system is capable of continuous and simultaneous monitoring of a variety of sensors and IAQ parameters including indoor/oudoor temperatures, rel. humidities and human-emitted excess CO<sub>2</sub>. The multi-room monitoring concept of indoor-CO<sub>2</sub> levels allows centralized control of natural ventilation levels in individual classrooms and can handle (quasi)-real-time data, relevant for data post-processing and future developments in (quasi)-real-rime assessment of IAQ and infection risk levels at single room scale. The sensor network is also extensible to up to one thousand of classrooms per LoRa-node allowing centralized control of entire school districts at an urban scale. Moreover, through Modbus-LoRa I/O converters, AulaSicura can also control the same amount of mechanical ventilation units per node either in pure or hybrid mechanical ventilation modes.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"4 ","pages":"Pages 24-31"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49884564","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}
引用次数: 2
Stability analysis of spatially interconnected systems with signal saturation 具有信号饱和的空间互联系统稳定性分析
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.02.002
Junxiao Song , Huabo Liu
{"title":"Stability analysis of spatially interconnected systems with signal saturation","authors":"Junxiao Song ,&nbsp;Huabo Liu","doi":"10.1016/j.iotcps.2023.02.002","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.02.002","url":null,"abstract":"<div><p>The robust stability problem of spatially interconnected systems with signal saturation among the many composed subsystems is considered. The system structure is usually sparse, and each subsystem has different dynamics. Firstly, a robust stability condition is established based on integral quadratic constraint (IQC) theory, which makes full use of the sparseness of the subsystem connection topology. Secondly, a decoupling robust condition that only depends on the subsystem parameters is proved. Finally, it is shown through numerical simulations that the obtained conditions are computationally valid in analyzing spatially interconnected systems with signal saturation constraints among the subsystems.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 93-99"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882293","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}
引用次数: 0
Blockchain inspired secure and reliable data exchange architecture for cyber-physical healthcare system 4.0 区块链为网络物理医疗保健系统4.0提供了安全可靠的数据交换架构
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.05.006
Mohit Kumar , Hritu Raj , Nisha Chaurasia , Sukhpal Singh Gill
{"title":"Blockchain inspired secure and reliable data exchange architecture for cyber-physical healthcare system 4.0","authors":"Mohit Kumar ,&nbsp;Hritu Raj ,&nbsp;Nisha Chaurasia ,&nbsp;Sukhpal Singh Gill","doi":"10.1016/j.iotcps.2023.05.006","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.05.006","url":null,"abstract":"<div><p>A cyber-physical system is considered to be a collection of strongly coupled communication systems and devices that poses numerous security trials in various industrial applications including healthcare. The security and privacy of patient data is still a big concern because healthcare data is sensitive and valuable, and it is most targeted over the internet. Moreover, from the industrial perspective, the cyber-physical system plays a crucial role in the exchange of data remotely using sensor nodes in distributed environments. In the healthcare industry, Blockchain technology offers a promising solution to resolve most securities-related issues due to its decentralized, immutability, and transparency properties. In this paper, a blockchain-inspired secure and reliable data exchange architecture is proposed in the cyber-physical healthcare industry 4.0. The proposed system uses the BigchainDB, Tendermint, Inter-Planetary-File-System (IPFS), MongoDB, and AES encryption algorithms to improve Healthcare 4.0. Furthermore, blockchain-enabled secure healthcare architecture for accessing and managing the records between Doctors and Patients is introduced. The development of a blockchain-based Electronic Healthcare Record (EHR) exchange system is purely patient-centric, which means the entire control of data is in the owner's hand which is backed by blockchain for security and privacy. Our experimental results reveal that the proposed architecture is robust to handle more security attacks and can recover the data if 2/3 of nodes are failed. The proposed model is patient-centric, and control of data is in the patient's hand to enhance security and privacy, even system administrators can't access data without user permission.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 309-322"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882290","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}
引用次数: 3
Detection-based active defense of biased injection attack based on robust adaptive controller 基于鲁棒自适应控制器的偏注入攻击检测主动防御
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.01.004
Xinyu Wang , Xiangjie Wang , Mingyue Zhang , Shuzheng Wang
{"title":"Detection-based active defense of biased injection attack based on robust adaptive controller","authors":"Xinyu Wang ,&nbsp;Xiangjie Wang ,&nbsp;Mingyue Zhang ,&nbsp;Shuzheng Wang","doi":"10.1016/j.iotcps.2023.01.004","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.01.004","url":null,"abstract":"<div><p>As the promising technology, the cooperative cyber-physical system can enhance the operating efficiency and reliability of smart grids. Meanwhile, the characteristics that deep integration of cyber-physical system can make smart grid face new security problems caused by false data injection attack. To maintain a safe and stable operation of smart grids, timely detection and defense of the emerging false data injection attacks, such as biased injection attack, is crucial. For this reason, this paper aims at developing a detection-based active defense mechanisms against biased injection attacks via robust adaptive controller. Through the established physical dynamic power model, an improved adaptive observer-based detection algorithm is proposed. Through the design of observer parameters, the proposed adaptive observer can enhance the accuracy of estimation state. In contrast to well-known attack detection methods for smart grids, the performance of attack detection under the developed detection algorithm can be effectively improved, such as the accuracy of state estimation and false positive rate. Through the above results provided by the attack detection, a robust adaptive controller-based active defense method is further developed. The proposed method can offset the impact of biased injection attack to maintain the stable running of power system. Simulation studies demonstrate the reliable response of the developed active defense method against biased injection attacks.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 14-23"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882219","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}
引用次数: 0
Fortaleza: The emergence of a network hub 福塔莱萨:网络枢纽的出现
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.05.001
Eric Bragion , Habiba Akter , Mohit Kumar , Minxian Xu , Ahmed M. Abdelmoniem , Sukhpal Singh Gill
{"title":"Fortaleza: The emergence of a network hub","authors":"Eric Bragion ,&nbsp;Habiba Akter ,&nbsp;Mohit Kumar ,&nbsp;Minxian Xu ,&nbsp;Ahmed M. Abdelmoniem ,&nbsp;Sukhpal Singh Gill","doi":"10.1016/j.iotcps.2023.05.001","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.05.001","url":null,"abstract":"<div><p>Digitalisation, accelerated by the pandemic, has brought the opportunity for companies to expand their businesses beyond their geographic location and has considerably affected networks around the world. Cloud services have a better acceptance nowadays, and it is foreseen that this industry will grow exponentially in the following years. With more distributed networks that need to support customers in different locations, the model of one-single server in big financial centres has become outdated and companies tend to look for alternatives that will meet their needs, and this seems to be the case with Fortaleza, in Brazil. With several submarine cables connections available, the city has stood out as a possible hub to different regions, and this is what this paper explores. Making use of real traffic data through looking glasses, we established a latency classification that ranges from exceptionally low to high and analysed 800 latencies from Roubaix, Fortaleza and Sao Paulo to Miami, Mexico City, Frankfurt, Paris, Milan, Prague, Sao Paulo, Santiago, Buenos Aires and Luanda. We found that non-developed countries have a big dependence on the United States to route Internet traffic. Despite this, Fortaleza proves to be an alternative for serving different regions with relatively low latencies.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 272-279"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882277","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}
引用次数: 0
Edge AI: A survey Edge AI:一项调查
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.02.004
Raghubir Singh , Sukhpal Singh Gill
{"title":"Edge AI: A survey","authors":"Raghubir Singh ,&nbsp;Sukhpal Singh Gill","doi":"10.1016/j.iotcps.2023.02.004","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.02.004","url":null,"abstract":"<div><p>Artificial Intelligence (AI) at the edge is the utilization of AI in real-world devices. Edge AI refers to the practice of doing AI computations near the users at the network's edge, instead of centralised location like a cloud service provider's data centre. With the latest innovations in AI efficiency, the proliferation of Internet of Things (IoT) devices, and the rise of edge computing, the potential of edge AI has now been unlocked. This study provides a thorough analysis of AI approaches and capabilities as they pertain to edge computing, or Edge AI. Further, a detailed survey of edge computing and its paradigms including transition to Edge AI is presented to explore the background of each variant proposed for implementing Edge Computing. Furthermore, we discussed the Edge AI approach to deploying AI algorithms and models on edge devices, which are typically resource-constrained devices located at the edge of the network. We also presented the technology used in various modern IoT applications, including autonomous vehicles, smart homes, industrial automation, healthcare, and surveillance. Moreover, the discussion of leveraging machine learning algorithms optimized for resource-constrained environments is presented. Finally, important open challenges and potential research directions in the field of edge computing and edge AI have been identified and investigated. We hope that this article will serve as a common goal for a future blueprint that will unite important stakeholders and facilitates to accelerate development in the field of Edge AI.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 71-92"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882216","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}
引用次数: 29
RTP transport in IoT MQTT topologies 物联网MQTT拓扑中的RTP传输
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.02.001
Rolando Herrero
{"title":"RTP transport in IoT MQTT topologies","authors":"Rolando Herrero","doi":"10.1016/j.iotcps.2023.02.001","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.02.001","url":null,"abstract":"<div><p>Media transmission in the context of constrained IoT devices is of critical importance to support several solutions that enable interaction with the physical environment. This includes solutions that range from scenarios of occupancy estimation in building automation to traditional audio and image processing in remote sensing. Many modern access side IoT networks follow <em>Event Driven Architecture</em> (EDA) topologies that rely on brokers to forward messages between endpoints. The <em>Message Queuing Telemetry Transport</em> (MQTT) is one such protocol that can be used to encapsulate well known <em>Real Time Protocol</em> (RTP) audio and media packets. Unfortunately, MQTT relies on TCP transport that is not well suited in IoT constrained environments. This paper introduces a scheme that leverages some of the MQTT features to enable the reliable transmission of media in the context of <em>Lossy Low Power Networks</em> (LLNs). Specifically, this scheme is presented, analyzed, optimized and compared against other state-of-the-art mechanisms.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 37-44"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882222","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}
引用次数: 2
Security of federated learning with IoT systems: Issues, limitations, challenges, and solutions 物联网系统联合学习的安全性:问题、限制、挑战和解决方案
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.04.001
Jean-Paul A. Yaacoub , Hassan N. Noura , Ola Salman
{"title":"Security of federated learning with IoT systems: Issues, limitations, challenges, and solutions","authors":"Jean-Paul A. Yaacoub ,&nbsp;Hassan N. Noura ,&nbsp;Ola Salman","doi":"10.1016/j.iotcps.2023.04.001","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.04.001","url":null,"abstract":"<div><p>Federated Learning (FL, or Collaborative Learning (CL)) has surely gained a reputation for not only building Machine Learning (ML) models that rely on distributed datasets, but also for starting to play a key role in security and privacy solutions to protect sensitive data and information from a variety of ML-related attacks. This made it an ideal choice for emerging networks such as Internet of Things (IoT) systems, especially with its state-of-the-art algorithms that focus on their practical use over IoT networks, despite the presence of resource-constrained devices. However, the heterogeneous nature of the current devices and models in complex IoT networks has seriously hindered the FL training process's ability to perform well. Thus, rendering it almost unsuitable for direct deployment over IoT networks despite ongoing efforts to tackle this issue and overcome this challenging obstacle. As a result, the main characteristics of FL in the IoT from both security and privacy aspects are presented in this study. We broaden our research to investigate and analyze cutting-edge FL algorithms, models, and protocols, with a focus on their efficacy and practical application across IoT networks and systems alike. This is followed by a comparative analysis of the recently available protection solutions for FL that can be based on cryptographic and non-cryptographic solutions over heterogeneous, dynamic IoT networks. Moreover, the proposed work provides a list of suggestions and recommendations that can be applied to enhance the effectiveness of the adoption of FL and to achieve higher robustness against attacks, especially in heterogeneous dynamic IoT networks and in the presence of resource-constrained devices.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 155-179"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882283","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}
引用次数: 1
IoT: Communication protocols and security threats 物联网:通信协议和安全威胁
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2022.12.003
Apostolos Gerodimos , Leandros Maglaras , Mohamed Amine Ferrag , Nick Ayres , Ioanna Kantzavelou
{"title":"IoT: Communication protocols and security threats","authors":"Apostolos Gerodimos ,&nbsp;Leandros Maglaras ,&nbsp;Mohamed Amine Ferrag ,&nbsp;Nick Ayres ,&nbsp;Ioanna Kantzavelou","doi":"10.1016/j.iotcps.2022.12.003","DOIUrl":"https://doi.org/10.1016/j.iotcps.2022.12.003","url":null,"abstract":"<div><p>In this study, we review the fundamentals of IoT architecture and we thoroughly present the communication protocols that have been invented especially for IoT technology. Moreover, we analyze security threats, and general implementation problems, presenting several sectors that can benefit the most from IoT development. Discussion over the findings of this review reveals open issues and challenges and specifies the next steps required to expand and support IoT systems in a secure framework.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 1-13"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882289","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}
引用次数: 0
Development of a smart sensing unit for LoRaWAN-based IoT flood monitoring and warning system in catchment areas 为集水区基于lorawan的物联网洪水监测和预警系统开发智能传感单元
Internet of Things and Cyber-Physical Systems Pub Date : 2023-01-01 DOI: 10.1016/j.iotcps.2023.04.005
Muhammad Izzat Zakaria , Waheb A. Jabbar , Noorazliza Sulaiman
{"title":"Development of a smart sensing unit for LoRaWAN-based IoT flood monitoring and warning system in catchment areas","authors":"Muhammad Izzat Zakaria ,&nbsp;Waheb A. Jabbar ,&nbsp;Noorazliza Sulaiman","doi":"10.1016/j.iotcps.2023.04.005","DOIUrl":"https://doi.org/10.1016/j.iotcps.2023.04.005","url":null,"abstract":"<div><p>This study introduces a novel flood monitoring and warning system (FMWS) that leverages the capabilities of long-range wide area networks (LoRaWAN) to maintain extensive network connectivity, consume minimal power, and utilize low data transmission rates. We developed a new algorithm to measure and monitor flood levels and rate changes effectively. The innovative, cost-effective, and user-friendly FMWS employs an HC-SR04 ultrasonic sensor with an Arduino microcontroller to measure flood levels and determine their status. Real-time data regarding flood levels and associated risk levels (safe, alert, cautious, or dangerous) are updated on The Things Network and integrated into TagoIO and ThingSpeak IoT platforms through a custom-built LoRaWAN gateway. The solar-powered system functions as a stand-alone beacon, notifying individuals and authorities of changing conditions. Consequently, the proposed LoRaWAN-based FMWS gathers information from catchment areas according to water level risks, triggering early flood warnings and sending them to authorities and residents via the mobile application and multiple web-based dashboards for proactive measures. The system's effectiveness and functionality are demonstrated through real-life implementation. Additionally, we evaluated the performance of the LoRa/LoRaWAN communication interface in terms of RSSI, SNR, PDR, and delay for two spreading factors (SF7 and SF12). The system's design allows for future expansion, enabling simultaneous data reporting from multiple sensor monitoring units to a server via a central gateway as a network.</p></div>","PeriodicalId":100724,"journal":{"name":"Internet of Things and Cyber-Physical Systems","volume":"3 ","pages":"Pages 249-261"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49882282","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}
引用次数: 4
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