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Tag Archive: Ns2 Projects

Promises of Conic Relaxation for Contingency-Constrained Optimal Power Flow Problem

This paper is concerned with the security-constrained optimal power flow (SCOPF) problem, where each contingency corresponds to the outage of an arbitrary number of lines and generators. The problem is studied by means of a convex relaxation, named semidefinite program (SDP). The existence of a rank-1 SDP solution guarantees the recovery of a global solution […]

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Ergodic Capacity of Interference Coordinated HetNet with Full-Duplex Small Cells

Full-duplex small cells provide a promising solution for meeting the capacity requirements of future wireless networks. The main objective of this paper is to analyse the sum ergodic capacity of full-duplex small cells operating in heterogeneous environments. A theoretical framework is developed and closed-form approximations for sum ergodic capacity have been derived. In order to evaluate […]

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Pluggable Electro-Optical Circuit Board Interconnect Based on Embedded Graded-Index Planar Glass Waveguides

Widespread adoption of electro-optical circuit boards based on embedded glass waveguide technology would enable seamless optical connectivity from external fiber-optic networks to system embedded optical interconnect architectures. In this paper, we report on the fabrication of planar multimode waveguides within thin glass foils based on a two-step thermal ion exchange process. Novel lamination techniques were developed to […]

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Experimental analysis and simulative validation of dynamic spectrum access for coexistence of 4G and future 5G systems

5G mobile networks will very likely include features that allow for a dynamic spectrum access (DSA) in order to exploit spectrum holes of a primary system. The efficient utilization of spectrum holes with minimum impairment of the primary system requires a waveform with a very low adjacent channel leakage ratio as well as robustness to time and […]

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Adaptive artificial bee colony based parameter selection for subpixel mapping multiagent system in remote-sensing imagery

Remote sensing has become an important source of land use/cover information at a range of spatial and temporal scales. The existence of mixed pixels is a major problem in remote-sensing image classification. Although the soft classification and spectral unmixing techniques can obtain an abundance of different classes in a pixel to solve the mixed pixel […]

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MatEx: Efficient transient and peak temperature computation for compact thermal models

In many core systems, run-time scheduling decisions, such as task migration, core activations/deactivations, voltage/frequency scaling, etc., are typically used to optimize the resource usages. Such run-time decisions change the power consumption, which can in turn result in transient temperatures much higher than any steady-state scenarios. Therefore, to be thermally safe, it is important to evaluate […]

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Wavelength-Multiplexed Polymer LEDs: Towards 55 Mb/s Organic Visible Light Communications

We present recent progress on visible light communication systems using polymer light-emitting diodes as the transmitters and a commercial silicon photodetector as the receiver. In this paper, we use transmitters at red, green, and blue wavelengths to investigate the maximum on-off keying link performance of each device type as the first steps toward a wavelength-division […]

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Accurate Connection Strength Estimation Based on Variational Bayes for Detecting Synaptic Plasticity

Connection strength estimation is widely used in detecting the topology of neuronal networks and assessing their synaptic plasticity. A recently proposed model-based method using the leaky integrate-and-fire model neuron estimates membrane potential from spike trains by calculating the maximum a posteriori (MAP) path. We further enhance the MAP path method using variational Bayes and dynamic causal modeling. […]

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Service elicitation of non-functional requirements: An approach using activity theory

The elicitation of non-functional requirements (generic qualities of services) in the design and maintenance of services is an issue that has to be analysed under the perspective of the business (e.g. marketing, production, etc.) and information systems (e.g. requirements engineering, networks, etc.). In general, the solutions approach the final analysis service requirements at the expense of […]

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Energy-Efficient Real-Time Human Mobility State Classification Using Smartphones

The key benefits of using the smartphone accelerometer for human mobility analysis, with or without location determination based upon GPS, Wi-Fi or GSM is that it is energy-efficient, provides real-time contextual information and has high availability. Using measurements from an accelerometer for human mobility analysis presents its own challenges as we all carry our smartphones […]

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