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Resonant properties of the planar plasmonic crystal on a membrane substrate

Bulletin of the Russian Academy of Sciences: Physics 2012年第2期76卷 229-232页

作者： Popov, V.V. Fateev, D.V. Polischuk, O.V. Nikitov, S.A. Otsuji, T. Shur, M.S. Kotelnikov Institute of Radio Engineering and Electronics Saratov Branch RAS Saratov 410019 Russia Saratov State University Saratov 410012 Russia Kotelnikov Institute of Radio Engineering and Electronics RAS Moscow 125009 Russia Research Institute of Electrical Communication Tohoku University 2-1-1 Katahira Aoba-Ku Sendai 980-8577 Japan Department of Electrical Computer and System Engineering Center for Integrated Electronics Rensselaer Polytechnic Institute Troy NY 12180 United States

The theory of the plasmon resonance excitation in the plasmonic-crystal structure on a dielectric substrate is presented. The effect of the plasmon resonance intensity oscillation as a function of the substrate thickness is predicted. It is shown that the enhancement of the plasmon resonance intensity occurs in a broad terahertz frequency range in the structure on a membrane substrate. © 2012 Allerton Press, Inc.

关键词： Crystal structure

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Operational and real-time team decision problems in the risk-averse transportation of dangerous goods by road

Operational and real-time team decision problems in the risk...

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IEEE International Conference on system of systems engineering (SoSE)

作者： Claudio Roncoli Roberto Sacile Michael G.H. Bell Department of Communication Computer and System Sciences University of Genova Genoa Italy Department of Civil and Environmental Engineering Imperial College London London UK

Dangerous goods transportation (DGT) is a relevant safety and security issue that has been treated in many papers in the last decades. Considering the significant damages that a DGT accident can cause, a DGT routing strategy is to avoid the worst case accident scenario, following a risk-averse behaviour. Game-theory is very useful in this context. Taking into account a DGT flow on a road network and the technologies for vehicle/infrastructure communication which are nowadays available, the overall context can be modelled as a system of systems, where a team of road segments concurs to find an optimal strategy to minimise the maximum risk on the territory. Two problems related to DGT are presented and preliminary formulations, at operational and at real-time level, are described. A solving method based on linear matrix inequalities is shown and first results are shown.

关键词： IEL Vehicles Q measurement

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A generalised diffusion-based file replication scheme for load balancing in P2P file-sharing networks

A generalised diffusion-based file replication scheme for lo...

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作者： Takaoka, Masanori Uchida, Masato Ohnishi, Kei Oie, Yuji NCOS Laboratory NEC Communication Systems 1753 Shimonumabe Nakahara-ku Kawasaki Kanagawa 211-8666 Japan Department of Electrical Electronics and Computer Engineering Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino-shi Chiba 275-0016 Japan Graduate School of Computer Science and System Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan

We propose a generalised diffusion-based file replication scheme for load balancing in unstructured P2P file-sharing networks. The generalised method is derived by replacing the replication probability of a peer used in our previous study with a new expression. In the previous expression, the replication probability is defined to be proportional to the difference between its own load and the average load of its neighbour peers. We show here that the replication probability can instead be expressed as a simple average of one defined to be negatively proportional to its own load and one defined to be proportional to the average load of its neighbour peers. The generalised method (a) includes the above three methods as special cases, (b) can control the trade-off between search and load balancing performances, (c) has a physical analogy to diffusion phenomena, and (d) achieves a good balance in the trade-off differently from our previous method. Copyright © 2012 Inderscience Enterprises Ltd.

关键词： Economic and social effects

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An adaptive policy-based approach for static and dynamic policy conflict detection: An implementation of location-based system

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content Technology and its Applications 2012年第22期6卷 1-10页

作者： Mansor, Abdelhamid Abdelhadi Wan Kadir, Wan M.N. Anwar, Toni Elias, Hidayah Hassan, Khalid Department of Computer Sciences Faculty of Mathematical Sciences University of Khartoum Sudan Software Engineering Department Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia Wireless Communication Centre Faculty of Electrical Engineering Universiti Teknologi Malaysia Malaysia

The new paradigm in mobile services lies in providing a location-based user experience and here lies the tremendous scope for expansion of location-based services (LBS). One of the key approaches that have been recognized as an enabler of such a view is policy-based management, which has been mostly acknowledged as a methodology that provides adaptability and support to automatically assign network resources, control Quality of Service and security, by considering administratively specified rules. Whilst current research focuses mostly on rules for low-level device configuration, significant challenges remain to be addressed in order to provide dynamic adaptation of policy in response to changes and ensure that policies will lead to a feasible implementation within the managed environment. In this paper, the emphasis is on building the described environment using today's existing technologies. We use our policy-based framework PobMC to combine mobile (location-based) services, ubiquitous and autonomic computing concepts. The goal is to bring the kind of informationrich environment, which is currently limited to computer screens, to the real world. This is achieved by constructing an architecture based on existing wireless network technologies and Web applications. Location information of destinations and users is computed by the received signal strength indicator (RSSI) values of the Wi-Fi sensors, to provide adaptive services over wireless Web. The users use their mobile devices to access these location-based services.

关键词： Location based services

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Red blood cell segmentation using masking and watershed algorithm: A preliminary study

Red blood cell segmentation using masking and watershed algo...

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International Conference on Biomedical engineering (ICoBE)

作者： J. M. Sharif M. F. Miswan M. A. Ngadi Md Sah Hj Salam Muhammad Mahadi bin Abdul Jamil Department of Computer System and Communication Faculty of Computer Science and Inoformation Systems Universiti Teknologi Malaysia Malaysia Department of Electronic Engineering Faculty of Electrical & Electronic Engineering Universiti Tun Hussein Onn Malaysia Malaysia

Image segmentation is the most important step and a key technology in image processing which directly affect the next processing. In human blood cell segmentation cases, many methods were applied for obtaining better results. It is basically an improved visualization to observe blood cell under blood smear process. This paper will present an approach for red blood cell (RBC) segmentation which is a part of study to perform automated counting for RBC. The methods involve are Ycbcr color conversion, masking, morphological operators and watershed algorithm. The combination of Ycbcr color conversion and morphological operator produce segmented white blood cell (WBC) nucleus. Then it is being used as a mask to remove WBC from the blood cell image. Morphological operators involve binary erosion diminish small object like platelet. The resulted RBC segmentation is passing through marker controlled watershed algorithm which handles overlapping cells. The improvement need to be done for both segmentation and overlapped cell handling to obtain better result in the future.

关键词： Image segmentation Blood Image color analysis Microscopy Accuracy Image edge detection

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An Efficient Algorithm for Improving Precision of Multi-Cell Channel Estimation systems

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Procedia engineering 2012年 41卷 367-376页

作者： Ali K. Marzook A. Ismail B.M. Ali A. Sali S. Khatun Computer andCommunication Systems Department Universiti Putra Malasia Serdang 43400 Malaysia Institute of Advanced Technology Universiti Putra Malasia Serdang 43400 Malaysia School of Computer and Communication System Engineering Universiti Malasia Perlis Malaysia

A new multi-cell joint channel estimation technique for uplink TD-SCDMA system is proposed. The Channel impulse responses of the serving cell and the effective neighboring cell users will process jointly. The new technique adopts the singular value decomposition criterion to reduce the rank order of the system channel matrix. Depending on a limited number of the real parameters that need it to describe the channel matrix, the estimation process will be efficient and the reduced rank technique can significantly improve the channel estimation accuracy. Simulation results show clearly that the proposed reduced rank estimator can significantly improve the channel estimation accuracy for multi-cell networks under rank-deficient consideration. The mean square error (MSE) measure has shown the validity performance of the proposed estimator over the conventional estimators. In addition, the correlation coefficient measures of the reduced rank estimators have shown slightly the superiority of the proposed technique.

关键词： TD-SCDMA systems multi-cell joint channel estimation reduced rank techniques SVD algorithm Steiner algorithm

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An improved MAC protocal for marine-environment monitoring WSN system

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Journal of Networks 2012年第11期7卷 1900-1907页

作者： Xu, Lizhong Zhang, Jiahua Li, Hua Harry Ye, Pengfei Yan, Xijun Li, Xiaofang College of Computer and Information Engineering Hohai University Nanjing 210098 China Institute of Communication and Information System Engineering Hohai University Nanjing 210098 China Computer Engineering Department San Jose State University San Jose CA 95192 United States

To meet the demand of the energy consumption, transmission bandwidth, high reliability and real-time transmission for marine-environment monitoring networks, we propose a Real-Time Data Duty Cycle Adaptive (RDDCA) algorithm to improve the Medium Access Control (MAC) layer of IEEE802.15.4 wireless communication standard, and design an architecture of Wireless Sensor Network (WSN) with star topology WSN system for monitoring marine-environment based on the RDDCA algorithm. Through the proposed system with sensor nodes, remote sensing terminals and data center, the states of the sensor nodes can be judged dynamically. The decision of whether to change the duty cycle of the transmission data can be made in the Marineenvironment remote sensing terminals. Simulations performed in Network Simulation Version 2 (NS2) show that the star topology based RDDCA algorithm for WSN system can achieve the demands of the marine-environment monitoring applications. Comparing with traditional IEEE802.15.4 standard, it is found that the performance is improved significantly in energy consumption, sensor nodes lifetime, network throughput and real-time performance. © 2012 Academy publisher.

关键词： Sensor nodes

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A dynamic decision model for Smart Grid real time optimal control

A dynamic decision model for Smart Grid real time optimal co...

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IEEE International Energy Conference and Exhibition (EnergyCon)

作者： A. Bonfiglio F. Delfino R. Minciardi R. Procopio M. Robba DYNATECH-Department of Naval Electrical and ICT Engineering University of Genoa Genoa Italy DIST-Department of Communication Computer and System Sciences University of Genoa Genoa Italy

The increased penetration of renewable energy sources and the concept of a dynamic and highly distributed Smart Grid which can intelligently integrate production units, storage systems and connected users opened new challenges in the application of optimization techniques. In this work, a dynamic optimization problem is formulated on a power grid characterized by wind and photovoltaic production units, conventional power plants, biomass co-generation and storage systems. A Model Predictive Control (MPC) scheme is adopted in the dynamic decision model for real time purposes. The decision problem takes into account the network load flows constraints and a state equation related to the state of charge (SOC) of the batteries. Different issues (economic, technical, environmental, security) have been taken into account for the formalization of the objective function. Numerical results are finally reported and discussed.

关键词： Biomass Reactive power Optimization Production Fossil fuels Load flow Power system dynamics

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Self-Optimization of RACH Power Considering Multi-cell Outage in 3GPP LTE systems

Self-Optimization of RACH Power Considering Multi-cell Outag...

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IEEE Vehicular Technology Conference

作者： Wonbo Lee Dongmyoung Kim Seunghyun Choi Kyung-Joon Park Sunghyun Choi Ki-Young Han School of Electrical Engineering and INMC Seoul National University Korea Department of Electrical Engineering and Computer Science University of Michigan USA Department of Information and Communication Engineering DGIST Korea System Lab. Next Generation System Team Samsung Electronics Korea

ISBN: (纸本)9781467309899

Self-organizing network (SON), which is an essential technology of future radio networks, is proposed in the 3GPP Long Term Evolution (LTE) specification as a usage case. In this paper, we focus on user equipment (UE)'s power control considering interference mitigation and retransmission constraints especially for physical random access channel (PRACH) of LTE. When a UE initially accesses an evolved-NodeB (eNB), it sends a preamble with an initial access level, and raises the power by a fixed step whenever the preamble was not detected by the eNB. We present an analysis and simulation to study the tradeoff relationship between inter-cell interference and retransmission according to the PRACH power setting, i.e., the initial target received power and power ramping step, assuming Rayleigh fading channels. Furthermore, we propose an algorithm tracing the optimal power setting that minimizes the resource wastage of the cell in consideration and its adjacent cells satisfying the constraint of retransmission and failure probability bound.

关键词： Self-Optimization RACH Power Considering Multi-cell Outage 3GPP LTE systems RETRANSMISSION Local thermodynamic equilibrium Long Term Evolution 3GPP Energy sources disturbance suppression inter-cell interference adaptive optimization Radio networks Power (Psychology) failure probability Access levels

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A New Ultrasound Pulser Technique for Wide Range Measurements

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Journal of Physics: Conference Series 2013年第1期423卷

作者： M S Salim M F Abd Malek N M Noaman Naseer Sabri Latifah Mohamed K M Juni School of Mechatronics Eng. University Malaysia Perlis01000 Malaysia School of Electrical System Eng. University Malaysia Perlis01000 Malaysia Electrical and Electronics Engineering Department Gulf University Bahrain Kingdom School of Computer and Communication Eng. University Malaysia Perlis Perlis 01000 Malaysia Electrical Engineering Department Politeknik Tuanku Syed Sirajudain Malaysia

The objective of this research was to design and implement a new ultrasonic pulse-power-decay technique that transmits multiple ultrasound pulses through slurry to determine the lowest concentration that can provide an accurate attenuation measurement. A wide measurement range is obtained using the pulsed-power-decay transmission technique, and regardless of the material used to construct the container. A signal in the receiver transducer provides the attenuation measurements, for each echo, a fast Fourier transform (FFT) of the appropriate signal was obtained and compared with the water signals to yield the attenuation as a function of frequency. The data show the feasibility of measuring a kaolin concentration of 5% wt. When using a commercial pulser with the same device setting, no detectable echo was observed. Therefore, new technique measurements may prove useful in detecting solid content in liquid. This study demonstrated that the proposed pulsed-power transmission technique is promising for evaluating low concentrations of solids in fluids and for measuring sedimentation in solid-liquid systems.

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