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IEEE/ACS international conference on Pervasive Services (ICPS)

作者： Y. Kishino T. Terada M. Tsukamoto T. Yoshihisa K. Hayakawa A. Kashitani S. Nishio Graduate School of Information Science and Technology Osaka University Graduate School of Information Science and Technology Osaka University Japan Faculty of Engineering Kobe University Japan 3rd Systems Operations Unit NEC Electronics Internet Systems Research Laboratories NEC Corp. Japan

In this paper, we propose a new network topology discovery mechanism among ubiquitous chips, which are rule-based, event-driven input/output (I/O) control devices to compose ubiquitous computing environments. Since they achieve flexibility by describing behavior in a set of rules, we employ a rule-based approach to discover network topology. In ubiquitous computing environments, we use various communication methods and applications at the same time. Therefore, our flexible discovery mechanism works well in ubiquitous computing environments. Moreover, we verified our algorithm by implementing it on a topology discovery simulator and actual prototype devices of ubiquitous chips.

关键词： Network topology Ubiquitous computing Computational modeling Virtual prototyping Information science IP networks National electric code Pervasive computing Wireless sensor networks Home appliances

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Communication-efficient bitonic sort on a distributed memory parallel computer

Communication-efficient bitonic sort on a distributed memory...

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international conference on Parallel and distributed systems.(ICPADS)

作者： Yong Cheol Kim Minsoo Jeon Dongseung Kim A. Sohn Department of Electrical Engineering Korea University Seoul South Korea Department of Computer & Information Science New Jersey Institute of Technology Newark NJ USA

ISBN: (纸本)0769511538

Sort can be speeded up on parallel computers by dividing and computing data individually in parallel. Bitonic sorting can be parallelized, however, a great portion of execution time is consumed due to O(log/sup 2/P) time of data exchange of N/P keys where P, N are the number of processors and keys, respectively. This paper presents an efficient way of data communication in bitonic sort to minimize the interprocessor communication and comparison time. Before actual data movement, each pair processor exchanges the minimum and maximum in its list of keys to determine which keys are to be sent to its partner. Very often no keys need to exchange, or only a fraction of them are exchanged. At least 20% or greater of execution time could be reduced on the T3E computer in our experiments. We believe the scheme is a good way to shorten the communication time in similar applications.

关键词： Concurrent computing distributed computing Sorting Application software Partitioning algorithms Data communication Merging Load management Costs Information science

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TENOR: power supply with a single AC/DC conversion stage and distributed energy storage adapted for telecommunication and computing systems

TENOR: power supply with a single AC/DC conversion stage and...

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international conference on Telecommunications Energy (INTELEC)

作者： D. Marquet Centre National d''Etudes Des Telecommunications Issy-Les-Moulineaux France

This paper presents the evolution of the energy power supply of telecommunication systems. The exchange and transmission equipment, centralized or distributed, need less and less power. The power is essentially used under electronic voltage (80 % under 5 V and 3 V for new technologies and some 12 V). Only 20 % of the power is delivered under 54 V for the remote power supply of the subscriber line. This voltage is no longer useful for the GSM radio network and FTTC optical network. Until now, the standardized voltage interface 48 V or 60 V remains the reference for telecommunication equipment. This voltage is supplied by decentralized DC cabinets having 1 hour autonomy, installed near the system or even integrated in the system itself. These cabinets are powered by the high availability GEODE AC source under 3 phase AC 400 V voltage of the public mains. Associated computers for complementary services, are powered by UPS providing an autonomy of 10 to 15 min. The standardized interface with the equipment is in this case the single phase public AC mains 230 V voltage. So, in the same centers, two uninterrupted power sources, DC 48 V and AC 230 V, run together with two standardized voltage interfaces, DC and AC. The TENOR project's aim is the unification of these two power supply methods with a single AC interface applicable to any size of installation. This result can be achieved through the new concept of distributed energy storage.< >

关键词： Power supplies Energy storage Voltage GSM Cables Telecommunication computing distributed computing Paper technology Optical fiber networks Availability

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Performance Measurements of Narrowband-IoT Network in Emulated and Field Testbeds

Performance Measurements of Narrowband-IoT Network in Emulat...

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IEEE international conference on Intelligent Data Acquisition and Advanced computing systems

作者： Jubin Sebastian E Axel Sikora Institute of Reliable Embedded Systems and Communication Electronics (ivESK) Offenburg University of Applied Sciences

ISBN: (纸本)9781728140704

Narrowband IoT (NB-IoT) as a radio access technology for the cellular Internet of Things (cIoT) is getting more traction due to attractive system parameters, new proposals in the 3rd Generation Partnership Project (3GPP) Release 14 for reduced power consumption and ongoing world-wide deployment. As per 3GPP, the low-power and wide-area use cases in 5G specification will be addressed by the early NB-IoT and Long-Term Evolution for Machines (LTE-M) based technologies. Since these cIoT networks will operate in a spatially distributed environment, there are various challenges to be addressed for tests and measurements of these networks. To meet these requirements, unified emulated and field testbeds for NB-IoT-networks were developed and used for extensive performance measurements. This paper analyses the results of these measurements with regard to RF coverage, signal quality, latency, and protocol consistency.

关键词： NB-IoT Cellular IoT Test and measurements 5G IoT LPWAN Access to technology Testing and Measurement Power consumption 3GPP system parameter measurement result Performance metrics Long Term Evolution

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Cloud distributed Optimal Control of ESS-PV Residential Inverters

Cloud Distributed Optimal Control of ESS-PV Residential Inve...

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Power systems.and Electrical Technology (PSET), IEEE international conference on

作者： Byungchul Kim Eyad H. Abed Department of Electrical and Computer Engineering University of Maryland College Park USA

ISBN: (数字)9798350353204

ISBN: (纸本)9798350353211

Perfect power flow methods can be employed to choose which inverters will supply and determine their optimal real and reactive power settings based on financial goals. Utilizing advanced semidefinite relaxation make possible to work out with lessen calculation loads. Reflecting on the complex power inculcation originated by strong robustness and the high resilience of ESS-PV inverter, the steady state voltage security area (SSVSA) for inverter is created. The voltage expedition indicator for inverter is suggested to measure the voltage security limit between the security range and operation state. The suggested scheme balances beneficially to large distribution networks.

关键词： Cloud computing Voltage measurement Simulation Energy Internet Inverters Robustness Steady-state Security Energy management systems Voltage control

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Object-oriented multitasking control environment for multirobot system programming and execution with 3D graphic simulation

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international Journal of Production Economics 1999年 60卷 241-250页

作者： Yasuda, Gen'ichi Department of Mechanical Engineering Faculty of Engineering Nagasaki Inst. of Applied Science 536 Aba-machi Nagasaki 851-01 Japan

This paper describes an object-oriented distributed control environment for industrial multirobot applications. A distributed computing environment, where workpieces, robots, and other industrial devices such as a vision sensor are defined as software objects with class inheritance hierarchy, supports human-friendly task-level programming and automated robot program generation with 3D graphic simulation, and performs supervisory and real-time sensor-based coordinated control of multirobot systems. Using object-oriented multitasking control with a preemptive rescheduler, vision-based robot positioning and pick and place operations for exchange of a workpiece are demonstrated to validate the control performance of the computing environment.

关键词： Object oriented programming

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Optimization of Power Supply System of Agricultural Enterprise with Solar distributed Generation

Optimization of Power Supply System of Agricultural Enterpri...

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3rd international conference on Intelligent computing and Optimization, ICO 2020

作者： Daus, Yu. V. Yudaev, I.V. Kharchenko, V.V. Panchenko, V.A. FSBEI HE Saint-Petersburg State Agrarian University Pushkin Saint-Petersburg196601 Russia Federal Scientific Agroengineering Center VIM Moscow109428 Russia Russian University of Transport Obraztsova st. 9 Moscow127994 Russia

ISBN: (纸本)9783030681531

Today, the activities of most enterprises are partially, and in some organizations, fully automated, that is why power outages lead to the interruption of all technological processes, financial damage to enterprises and various problems in the communal sector during power outages. One of the options for ensuring uninterrupted energy supply, improving the quality and reliability of power supply to consumers in rural and remote areas in cases of accidents in distribution networks can be considered the use of renewable energy sources. The purpose of the research is to optimize the configuration of the power supply system of agricultural enterprise by using solar power plants. The object of the research is the power supply system of the production facility of the agro-industrial complex. There was conducted calculation of the number of photovoltaic modules that can be placed on the roofs of agricultural enterprise to achieve maximum electrical energy generation during the day. On the basis of experimentally obtained data of currents and voltages, the generated power of photovoltaic modules was determined. The ratio of the maximum generated power of the south-oriented module located at tilt angle of 15° to the maximum generated power of the south-oriented module located at the optimal tilt angle of 39° was also determined. The average value of the ratio of the maximum generated power of the south-oriented PV module located at tilt angle of 15° to the maximum generated power of the south-oriented panel located at optimal tilt angle of 39° was calculated. The total daily production of electrical energy by all solar power plants is 885.22 kWh per day for a given date (Nov. 1). The ratio of daily electricity generated by solar power plant to that consumed by production facility in the specially selected city of Russia (Zernograd) is 71.8%. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Outages

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Short Term Nonlinear Load Forecasting Method for distributed Photovoltaic Grid Connection Based on GSA Algorithm

Short Term Nonlinear Load Forecasting Method for Distributed...

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Artificial Intelligence, Internet of Things and Cloud computing Technology (AIoTC), international conference on

作者： Pengfei Xu Yan Li Mengyuan Tang Xing Tian Baohao Gao Economic and Technological Research Institute of State Grid Ningxia Electric Power Co. Ltd. Yinchuan Ningxia China

ISBN: (数字)9798331530280

ISBN: (纸本)9798331530297

In order to cope with the intermittency and uncertainty of photovoltaic power generation and improve the accuracy of short-term load forecasting, a distributed photovoltaic grid connected short-term nonlinear load forecasting method based on Genetic Simulated Annexing Algorithm (GSA) is proposed. The historical data of the distributed photovoltaic grid connected system is used as the analysis basis, and the concept of particle aggregation is introduced to establish a solution space. The global load data is searched in the space, and the original data is substituted into the solution space to achieve load data normalization processing. Design a distributed photovoltaic grid connected short-term nonlinear load forecasting method based on GSA, obtain the global optimal solution, and accurately predict short-term load changes. The experimental results show that this method has significantly improved prediction accuracy and can more accurately predict short-term nonlinear loads.

关键词： Photovoltaic systems Accuracy Uncertainty Load forecasting Processor scheduling Simulated annealing Prediction algorithms Genetics Scheduling Resource management

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Isolation Forest Based Anomaly Detection and Fault Localization for Solar PV System

Isolation Forest Based Anomaly Detection and Fault Localizat...

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international conference on Robotics,Electrical and Signal Processing Techniques (ICREST)

作者： Shaharier Kabir Abu Shufian Md. Saniat Rahman Zishan Department of Electrical and Electronic Engineering American International University-Bangladesh Dhaka Bangladesh Institute of Energy Technology Chittagong University of Engineering & Technology Chattogram Bangladesh

The decrease in fossil fuel reserves has prompted a global move toward distributed energy resources. For this reason, solar PV power generation has recently gained much attention as a feasible renewable energy source. However, large-scale generation is challenging if there are anomalies in individual solar PV panels. This will reduce the efficiency of the PV system and create a potential fire hazard. In this perspective, the anomaly detection technique discloses system anomalies accurately and effectively. Identified anomalies will localize the event for an improved generation. This paper addresses the performance analysis of using the isolation forest technique to identify anomalies in the PV system and the rule-based fault localization technique to identify defective panel events. In the developed model, the isolation forest technique found around 453 anomalies in 45,740 observations, and approximately six panels indicated a fault in the system. The accuracy score is found to be approximately 0.9886. The proposed fault detection method will help detect the faults in solar power systems.

关键词： Fault diagnosis Location awareness Training Renewable energy sources Fault detection Forestry Production

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5G-Advanced Infrastructure for Smart Energy: Converging Technologies and Management

5G-Advanced Infrastructure for Smart Energy: Converging Tech...

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Emerging Trends in Electrical, Electronic and Communications Engineering (ELECOM), 2020 3rd international conference on

作者： Dragorad Milovanovic Vladan Pantovic Dejan Vukobratovic Boris Dumnic University of Belgrade Belgrade Serbia University of Union-NT Belgrade Serbia University of Novi Sad Novi Sad Serbia

ISBN: (数字)9798331532475

ISBN: (纸本)9798331532482

The Smart Grid energy system continuously evolves, becoming more complex and sophisticated. We present innovative concept Energy Internet based on converging communication technologies and interoperability. Our focus is recent 3GPP standardization activities and study on Smart Energy infrastructure. 5G-Advanced mobile networks offer perfect solution for connectivity, compute, storage and native ML/AI support for distributed management systems. Deployment of emerging Smart Energy services and evolving 5G network infrastructure as virtualized software architecture across edge-to-cloud compute-storage resources is analyzed.

关键词： Software architecture 5G mobile communication Energy Internet Standardization Market research Communications technology Smart grids 3GPP distributed management Interoperability

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