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Efficient and secure Routing Protocol Based on Encryption and Authentication for Wireless Sensor Networks

Efficient and secure Routing Protocol Based on Encryption an...

引用

International Conference on Artificial Intelligence and Education (ICAIE)

作者： Jiliang Zhou College of Computer Science & Information Engineering Zhejiang Gongshang University Hangzhou China

ISBN: (纸本)9781424469352

One concerned issue when designing Wireless Sensor Networks (WSNs) is the routing protocol that requires the researchers to provide as much security to the application as possible. In this paper, we propose efficient and secure Routing Protocol Based on Encryption and Authentication for WSNs: BEARP, which consists of three phases: neighbor discovery phase and routing discovery phase. BEARP encrypts all communication packets and authenticates the source node and the BS (Base Station), and it ensures the four security features including routing information confidentiality, authentication, integrity and freshness. Our BEARP also mitigates the loads of sensor nodes by transferring routing related tasks to BS, which not only maintains network wide energy equivalence and prolongs network lifetime, but also improves our security mechanism performed uniquely by the secure BS.

关键词： Neodymium Routing protocols Cryptography Authentication density estimation robust algorithm Wireless sensor networks Message systems

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Loss-of-synchronism detection automatics for the networks with distributed generation

Loss-of-synchronism detection automatics for the networks wi...

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Power Tech Conference

作者： Antans Sauhats Inesa Svalova Andrejs Svalovs Faculty of Power and Electrical Engineering Riga Technical University Riga Latvia Institute of Electrical Engineering Riga Technical University Riga Latvia

Loss-of synchronism processes in the distribution networks with distributed energy resources are considered. They are influenced by new conditions that were not actual for the transmission system. To eliminate the loss-of-synchronism, special detection automatics is used. The application of such an automatics in low-voltage networks with distributed generation is specific. To meet the changed requirements, new algorithm of the automatic device is introduced. It is based on assumptions of voltage range and impedance angle. Equivalent non-synchronous emfs are modeled The method was tested by simulation of the loss-of-synchronism condition that takes place in the distribution networks.

关键词： Distributed control Wind turbines Induction generators Synchronous generators Inverters density estimation robust algorithm Protective relaying Circuit faults Power system stability AC generators

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MOTION HISTORY IMAGES FOR ONLINE SPEAKER/SIGNER DIARIZATION

MOTION HISTORY IMAGES FOR ONLINE SPEAKER/SIGNER DIARIZATION

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Binyam Gebrekidan Gebre Peter Wittenburg Tom Heskes Sebastian Drude Max Planck Institute for Psycholinguistics Radboud University

ISBN: (纸本)9781479928941

We present a solution to the problem of online speaker/signer diarization - the task of determining who spoke/signed when?. Our solution is based on the idea that gestural activity (hands and body movement) is highly correlated with uttering activity. This correlation is necessarily true for sign languages and mostly true for spoken languages. The novel part of our solution is the use of motion history images (MHI) as a likelihood measure for probabilistically detecting uttering activities. MHI is an efficient representation of where and how motion occurred for a fixed period of time. We conducted experiments on 4.9 hours of the AMI meeting data and 1.4 hours of sign language dataset (Kata Kolok data). The best performance obtained is 15.70% for sign language and 31.90% for spoken language (measurements are in DER). These results show that our solution is applicable in real-world applications like video conferences and information retrieval.

关键词： History density estimation robust algorithm Speech Conferences Assistive technology Gesture recognition Speech processing

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Properly understanding the impacts of distributed resources on distribution systems

Properly understanding the impacts of distributed resources ...

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IEEE General Meeting Power& Energy Society

作者： D. Tom Rizy Fangxing Li Huijuan Li Sarina Adhikari John D. Kueck Oak Ridge National Laboratory Oak Ridge TN USA Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN USA

The subject paper discusses important impacts of distributed resources on distribution networks and feeders. These include capacity, line losses, voltage regulation, and central system support (such as volt/var control via central generators and substation) as the number, placement and penetration levels of distributed resources are varied. Typically, the impacts of distributed resources on the distribution system are studied by using steady-state rather than dynamic analysis tools. However, the response time and transient impacts of both system equipment (such as substation/feeder capacitors) and distributed resources needs to be taken into account and only dynamic analysis will provide the full impact results. ORNL is completing a study of distributed resources interconnected to a large distribution system considering the above variables. A report of the study and its results will be condensed into a paper for this panel session. The impact of distributed resources will vary as the penetration level reaches the capacity of the distribution feeder/system. The question is how high of a penetration of distributed resource can be accommodated on the distribution feeder/system without any major changes to system operation, system design and protection. The impacts will most surely vary depending upon load composition, distribution and level. Also, it is expected that various placement of distributed resources will impact the distribution system differently.

关键词： density estimation robust algorithm Voltage control Reactive power Load modeling Electrical engineering Laboratories Energy resources

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Power sharing control of batteries within autonomous microgrids based on their state of charge

Power sharing control of batteries within autonomous microgr...

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Australasian Universities Power Engineering Conference, AUPEC

作者： Tahoura Hosseinimehr Farhad Shahnia Arindam Ghosh Department of Electrical and Computer Engineering Curtin University Perth Australia

This paper presents a new power sharing approach among parallel battery storage systems within an autonomous microgrid. The proposed approach considers the state of charge (SoC) of the batteries to control the ratio of their output powers. To facilitate this, a new SoC-based droop control is proposed. In this method, the ratio of output power for all the batteries is determined as a function of their SoC level. This ratio will be varied over time. In order to make the output power of each storage unit independent from the SoC level of the rest of storage units, a modified droop-based voltage control technique is applied for the other energy resources of the microgrid. By the help of the modified control system, the output power reduction of batteries is only picked up by the energy resources. The studies and discussions are validated through PSCAD/EMTDC simulation studies.

关键词： Power generation Power conversion density estimation robust algorithm Simulation Batteries Control systems

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Effect of non-unity power factor operation in photovoltaic inverters employing grid support functions

Effect of non-unity power factor operation in photovoltaic i...

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2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

作者： Sigifredo Gonzalez Jason Neely Michael Ropp Sandia National Laboratories Albuquerque New Mexico Northern Plains Power Technologies Brookings South Dakota

ISBN: (纸本)9781479943975

The high penetration of utility-interconnected photovoltaic systems is causing heightened concern over the effect that variable renewable generation will have on the electric power system (EPS). These concerns have initiated the need to amend the utility interconnection standard to allow functionalities, so-called advanced inverter functions, to minimize the negative impact these variable distributed energy resources may have on EPS voltage and frequency. Unfortunately, advanced functions, in particular volt-VAr, will result in non-unity power factor (PF) operation[3]. The increased phase current results in additional conduction losses and switching losses in the inverter power electronics. These power losses have a direct impact on real power delivered to the grid at the point of common coupling (PCC) and an impact on inverter service life. This report provides analysis, simulation, and experimental evidence to investigate the effect of advanced inverter functions on non-unity PF operation.

关键词： Reactive power Standards Switches Voltage control density estimation robust algorithm Accuracy

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Review on protection issues with penetration of distributed generation in distribution system

Review on protection issues with penetration of distributed ...

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International Electrical Engineering Congress (iEECON)

作者： Ashutosh Kumar Tiwari Soumya Ranjan Mohanty Ravindra Kumar Singh Electrical Engineering Department Motilal Nehru National Institute of Technology Allahabad Allahabad India

This paper presents a review on the impact of distributed generation (DG) on fault detection and fault localization in power distribution system. The penetration of DG in distribution system has significant impact on protection issues, as the load flow of the network changes and also the distribution system remains no longer radial. The bi-directional flow of fault current increases the complexity of protection coordination as the range of fault current changes and may cause protective device to become blind in case of over current and short circuit with the integration of DG. The impact of DG on fault detection, fault clearance and minimizing the outage time demands the need for changes in fault detection and localization methods. A lot of research is undergoing in this prospect for the improvement in various methods widely used for fault detection and localization.

关键词： density estimation robust algorithm Relays Switches Resonant frequency Distributed power generation Fault location

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Impedance-based adaptive droop method in islanded microgrids with three-phase and single-phase converters for line loss reduction

Impedance-based adaptive droop method in islanded microgrids...

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IEEE Workshop on Computers in Power Electronics

作者： Konstantinos O. Oureilidis Spyros I. Gkavanoudis Charis S. Demoulias Department of Electrical & Computer Engineering Aristotle University of Thessaloniki (AUTH) Thessaloniki Greece

During the last decade, the integration of Distributed Energy Resources (DERs) has considerably increased, establishing the microgrid concept. A common power sharing methodology applied in converter-dominated microgrids without physical communication among the DERs is the droop control method. According to this method, the active power-frequency and the reactive power-voltage droop curves are adopted, in order to fulfil the load demands with power of high quality and reliability. Conventionally, the droop coefficients are fixed and predetermined, according to the nominal apparent power of the converter. However, this power sharing may not be the optimum, regarding the line losses. This paper proposes a novel adaptive droop control method, where the droop coefficients are adjusted based on the indirect measurement of the microgrid impedance, aiming at operation with reduced line losses. The sensed microgrid impedance is different for each DER, since the line impedances between the DER and the loads are different. The proposed control strategy can be implemented in both three-phase and single-phase converters, while the location and the size of the loads can be arbitrary within the microgrid. The effectiveness of the proposed control strategy is validated by analytical simulation tests.

关键词： Microgrids Impedance density estimation robust algorithm Voltage control Reactive power Voltage measurement Phase locked loops

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Nuts and Flakes: a Study of Data Characteristics in Speaker Diarization

Nuts and Flakes: a Study of Data Characteristics in Speaker ...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： N. Mirghafori C. Wooters International Computer Science Institute Berkeley CA USA

Researchers in the speaker diarization community have observed that some audio files show unusually high diarization error rates (DER) (hard to crack "nuts"), and some exhibit hyper-sensitivity to tuning parameters ("flakes"). The goal of this study is to systematically study the features that correlate with such behavior. We calculated over forty features for each of 24 shows from the broadcast news corpus along the dimensions of speaker count, conversation turn, and speaker and show duration. We observed that number of speakers, number of turns, and do-nothing DER (a measure related to the percentage of time the dominant speaker spoke) correlated best with "nuttiness". The do-nothing DER and number of speakers were also the best correlates of "flakiness"

关键词： density estimation robust algorithm Audio recording Error analysis NIST Broadcasting Optimal matching Computer science Time measurement Cellular neural networks Contracts

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Hierarchical modulations for multimedia and multicast transmission over fading channels

Hierarchical modulations for multimedia and multicast transm...

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IEEE Conference on Vehicular Technology (VTC)

作者： Md.J. Hossain P.K. Vitthaladevuni M.-S. Alouini V.K. Bhargava Department of Electrical and Computer Engineering University of Victoria Victoria BC Canada Department of Electrical and Computer Engineering University of Minnesota Minneapolis MN USA

In this paper, a hierarchical modulation scheme (known also as embedded, multi-resolution, or asymmetrical constellation) is studied for transmission of multicast and multimedia services over wireless fading channels. Specifically, we propose general design guidelines for multicast and multimedia transmission over fading channels with an adaptive hierarchical phase-shift-keying (PSK) constellation. Computer simulation results show that the proposed adaptive hierarchical M-PSK is more energy efficient than the traditional adaptive uniform M-PSK for both applications except some special cases. The energy gain of hierarchical PSK over uniform PSK depends only on the required quality parameters of the services in multimedia transmission. For multicasting, the gain depends on both the recipients' link qualities and the required quality parameters of the multicast message.

关键词： Fading Phase shift keying Error probability Throughput Guidelines Computer simulation Error analysis density estimation robust algorithm Large Hadron Collider Protection

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