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[IEEE 2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) - Macau, China (2019.11.3-2019.11.8)] 2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) - Robust High Accuracy Visual-Inertial-Laser SLAM System
摘要： Wireless standardization activities, such as the Bluetooth V4.x (Bluetooth smart), have led to an explosive growth in innovative short-range wireless devices capable of providing various services to assist everyday life. Allowing machine-to-machine (M2M) communication between these M2M devices also presents new commercial service opportunities. M2M service providers, including telecom carriers, may need to establish new networks to accommodate M2M interactions while identifying new business opportunities. Typically, M2M devices need another capable device, such as a smartphone, to act as a gateway to connect to the Internet to operate at their full potential. We propose a novel scheme in which any Internet-enabled device in the vicinity can act as an M2M gateway for M2M devices. This eliminates the need for the M2M device user to also own a smartphone or an Internet-enabled device to obtain services such as online-to-offline. This scheme faces new challenges, such as how to identify the best M2M gateway for a required service and the QoS. This paper proposes a method to select an M2M gateway from a large number of possibilities in order to increase service availability while also obtaining better signal strength for higher QoS. The methods presented are evaluated in terms of their performance, including energy consumption, and a service deployment guideline is derived using real-world data collected at an exhibition, which gave encouraging results.
关键词： M2M service architecture,energy consumption,Internet of Things,M2M communication,Bluetooth smart device,M2M gateway selection
更新于2025-09-19 17:13:59
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Recent Progress on Indoor Organic Photovoltaics: From Molecular Design to Production Scale
摘要： Recently, indoor photovoltaics have attracted much interest for their ability to power small electronic devices and sensors, especially with the growth of the Internet of Things (IoT). Due to their absorption covering ambient emission spectra and tunable electronic structures, π-conjugated polymers and small molecules are well-suited for these applications. Among many benefits, including their ink processability, lightweight and flexibility; indoor organic photovoltaics (IOPVs) show power conversion efficiencies (PCE) over 26%. It represents a power output over 30 μW cm-2 under office light (500 lux), which is sufficient to operate many electronic devices and sensors with a relatively small photovoltaic area. This focus review highlights the major advances in the material design for IOPVs and includes some industrial insights to reach the production scale criteria.
关键词： indoor photovoltaics,material design,power conversion efficiencies,organic photovoltaics,Internet of Things
更新于2025-09-19 17:13:59
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[IEEE 2019 International Conference on Electrical, Electronics and Computer Engineering (UPCON) - ALIGARH, India (2019.11.8-2019.11.10)] 2019 International Conference on Electrical, Electronics and Computer Engineering (UPCON) - Behaviour Analysis of Multilayer and Bulk Heterojunction Organic Solar Cell With Aluminium-Doped Zinc Oxide Anode Layer
摘要： A wireless multihop infrastructure (WMI) employs homogeneous and easily deployable wireless routers to facilitate disaster-resilient Internet access in smart cities, emergency situations, and the Internet of Things. On the other hand, however, a WMI is subject to energy constraints, carries unbalanced traffic, and has weaknesses in terms of maintenance, such as the lack of human management. Therefore, efficiently sharing network tasks and energy consumption in a WMI are essential to network sustainability. In this paper, we consider the problem of explicit differentiation presentation for improving network sustainability, which involves two aspects. One is the problem of quantifying the differentiation of network activities and energy consumption. The other is the problem of utilizing the differentiation factor of each node for routing operations so as to regulate network packet flows for sustaining Internet access in a WMI. We examine the differentiation of network activities and energy consumption in WMIs by considering network activities, including not only packet transmission and reception but also packet overhearing, and other types of energy consumption. Based on the quantification of energy differentiation at each base station (BS), we design a novel router metric that enables an efficient sharing of network activities among BSs. The theoretical analyses of energy differentiation were validated based on the packet-level simulation. The simulation results demonstrate that our proposed router metric based on energy differentiation outperforms various other competitive metrics of multihop wireless networks to improve network sustainability for different network models.
关键词： sustainable Internet access,energy,WMI networks,router metric,disaster resilience,differentiation
更新于2025-09-19 17:13:59
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[IEEE 2019 16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS) - Shenzhen, China (2019.11.25-2019.11.27)] 2019 16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS) - A Wavelength Stabilized GaN based Laser Utilizing Distributed Bragg Reflector
摘要： Wireless sensor networks (WSNs) are a prominent fundamental technology of the Internet of Things (IoTs). Rather than device-to-device communications, group communications in the form of broadcasting and multicasting incur efficient message deliveries among resource-constrained sensor nodes in the IoT-enabled WSNs. Secure and efficient key management is in many cases used to protect the authenticity, integrity, and confidentiality of multicast messages. This paper develops two group key establishment protocols for secure multicast communications among the resource-constrained devices in IoT. Major deployment conditions and requirements of each protocol are described in terms of the specific IoT application scenarios. Furthermore, the applicability of the two protocols is analyzed and justified by a comprehensive analysis of the performance, scalability, and security of the protocols proposed.
关键词： wireless sensor networks,group key establishment,multicast,Internet of Things,security
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Evaluation of the plane of array irradiance for a photovoltaic installation equipped with flat reflectors in different geographical locations
摘要： The development of informationization and intelligentization prompts Internet developing toward a new era. A deep fusion among cyber space, physical space, social space, and thinking space brings a quaternionic cyber-physical-social-thinking hyperspace, based on which an embryo of smart world is being established through heterogeneous spaces. The smart world is expected to be an attractive perspective involving ubiquitous sensing, computing, and communication to achieve comprehensive interconnections of physical perception, cyber interaction, social correlation, and cognitive thinking. In this paper, evolution of the smart world is brie?y introduced, and physical-based coordination, social-inspired interactivity, brain-abstracted cooperativity, and cyber-enabled homogeneity are, respectively, discussed as the main characteristics of the smart world.
关键词： cyber-physical-social system,Smart world,Internet of Things,hyperspace
更新于2025-09-19 17:13:59
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[IEEE 2019 Photonics North (PN) - Quebec City, QC, Canada (2019.5.21-2019.5.23)] 2019 Photonics North (PN) - Surface Role in Laser-Induced Forward Transfer Applications
摘要： The lack of good and up-to-date lab experiments form a major impediment in the domain of engineering education. Often, the lab experiments are outdated. The Virtual Labs project addresses the issue of lack of good lab facilities, as well as trained teachers, by making remote experimentation possible. The pedagogy is student-centric. The Virtual Labs project has also developed a novel methodology for ?eld trials, outreach, and quality control. Virtual Labs also provide tremendous cost advantage. The Virtual Labs project is a wonderful example of an open educational resource developed by a multiinstitution multidiscipline project team. Over 100 000 students are currently using the online labs under the Virtual Labs project. Many of these labs are being accessed outside the regular lab hours.
关键词： internet-based experimentation,remote experimentation,information and communications technology (ICT),Open educational resources (OERs)
更新于2025-09-19 17:13:59
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[IEEE 2019 International Conference on Power Electronics, Control and Automation (ICPECA) - New Delhi, India (2019.11.16-2019.11.17)] 2019 International Conference on Power Electronics, Control and Automation (ICPECA) - Hybrid algorithm for reactive power control in grid integrated Photovoltaic inverters
摘要： Prognostics and systems health management (PHM) is an enabling discipline that uses sensors to assess the health of systems, diagnoses anomalous behavior, and predicts the remaining useful performance over the life of the asset. The advent of the Internet of Things (IoT) enables PHM to be applied to all types of assets across all sectors, thereby creating a paradigm shift that is opening up significant new business opportunities. This paper introduces the concepts of PHM and discusses the opportunities provided by the IoT. Developments are illustrated with examples of innovations from manufacturing, consumer products, and infrastructure. From this review, a number of challenges that result from the rapid adoption of IoT-based PHM are identified. These include appropriate analytics, security, IoT platforms, sensor energy harvesting, IoT business models, and licensing approaches.
关键词： remaining useful life,reliability,Internet of things,prognostics and systems health management,maintenance
更新于2025-09-19 17:13:59
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[IEEE 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) - Xiamen, China (2019.12.17-2019.12.20)] 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) - Hybrid ARoF-WDM PON Infrastructure for 5G Millimeter-wave Interface and Broadband Internet Service
摘要： In this paper, the architecture of hybrid analog radio over fiber (ARoF) and next-generation (NG) wavelength division multiplexed passive optical network (WDM-PON) infrastructure for broadband internet services and the latest fifth-generation (5G) cellular mobile communications is proposed. Investigated ARoF-WDM PON architecture is a trade-off between technology and cost for future 5G mobile cellular communications to meet the internet service requirements, allowing to increase system capacity ensuring higher spectral and energy efficiency. In our proposed infrastructure the widespread used passive optical access network (PON) architecture is technologically transformed to the AROF-WDM-PON transmission system without replacing existing network elements, by integrating baseband units (BBUs) or mobile radio transmitters located in optical line terminal (OLT) at the central office (CO) and the receiving radio unit (RU) part of mobile base stations, leaving the traditional WDM-PON broadband architecture unchanged. In our investigated ARoF-WDM PON transmission system model, designed in the simulation environment, we research the possible ARoF system implementation scenarios into the PON’s segment, which has been now standardized to the 40 Gigabit-capable next-generation passive optical network (NG-PON2) standard providing an unique solution for hybrid fiber optical infrastructure serving as the next step for future 5G wireless communication networks.
关键词： 5G,millimeter-wave,broadband internet,WDM-PON,ARoF
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE CPMT Symposium Japan (ICSJ) - Kyoto, Japan (2019.11.18-2019.11.20)] 2019 IEEE CPMT Symposium Japan (ICSJ) - Single-mode glass waveguide substrate for PIC packaging
摘要： With the rapid development and application of the mobile Internet, huge amounts of user data are generated and collected every day. How to take full advantages of these ubiquitous data is becoming the essential aspect of a recommender system. Collaborative ?ltering (CF) has been widely studied and utilized to predict the interests of mobile users and to make proper recommendations. In this paper, we ?rst propose a framework of the CF recommender system based on various user data including user ratings and user behaviors. Key features of these two kinds of data are discussed. Moreover, several typical CF algorithms are classi?ed as memory-based approaches and model-based approaches and compared. Two case studies are presented in an effort to validate the proposed framework.
关键词： Mobile Internet,collaborative ?ltering,recommender system
更新于2025-09-19 17:13:59
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[IEEE 2019 TEQIP III Sponsored International Conference on Microwave Integrated Circuits, Photonics and Wireless Networks (IMICPW) - Tiruchirappalli, India (2019.5.22-2019.5.24)] 2019 TEQIP III Sponsored International Conference on Microwave Integrated Circuits, Photonics and Wireless Networks (IMICPW) - L-band Extended National Optical Fiber Network to Achieve the Mission of Digital India
摘要： To support the increased internet traffic, usage of 4G enabled smartphones and smart application of the Internet of Things (IoT) leads the requirement of spectrally scalable optical transport platform for the existing National Optical Fiber Network (NOFN) in India. Increasing traffic will soon exhaust the Conventional (C)-band. Therefore, we propose the novel architecture and the extension strategy enabling NOFN to consume the Long (L)-band and improve the total fiber capacity. Spectral expansion using L-band enables the twofold total fiber capacity and cost advantage over the already deployed fibers in the country. In this paper, we demonstrate the successful spectral expansion for NOFN enabling the C+L band transmission, two folding the total fiber capacity.
关键词： Wavelength Division Multiplexing (WDM),Conventional (C)-band,Long (L)-band,Elastic Optical Networks (EON),National Optical Fiber Network (NOFN),Internet of Things (IoT)
更新于2025-09-16 10:30:52