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Category Archive: NS2 PROJECTS IN HYDERABAD

On the distributed acoustic sensing based on local time-frequency coherence analysis

This paper outlines novel approaches to design a new generation of distributed networks of acoustic sensors. The key-concept is marked by the use of time-frequency signal analysis tools directly embedded at the sensor node. The general framework for analysis at the acoustic sensor level is based on spectrogram which is very simple and easy to implement. The […]

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Dependable Systems Modeling and Reliability Property Evaluation by Model Checking

Modeling for dependability is an established method in the domain of information systems. Most approaches dealing with structural or probabilistic modeling do not consider time information. This paper presents an approach for modeling dependable information systems for fault prediction. Established analysis techniques are applied to a particular learned model. These should reveal path to failure […]

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Developing intelligent logistics – Building a competence model for logistics systems engineer

Logistics is an interdisciplinary field. Modern logisticians need to integrate business management skills with technology design, IT systems know-how and other engineering fields. However, based on research of university curricula and competence standards in logistics, the engineering aspect is not represented in full potential. There are a few treatments of logistician competences relating to engineering, […]

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Doppler shift estimation for HF channels based on TEC measurements

Communication over long distances in an HF channel is established through ionospheric propagation. Ionosphere continuously changes due to both the effect of the sun and also other causes such as geomagnetic storms and drift. Therefore, instantaneous knowledge of the state of ionosphere has an inevitable effect on the link quality. One of the important influences […]

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Beam-switchable phased array antennas for the near-field RFID applications

This paper presents a new RFID reader antenna design with its radiation beam switchable to track the tags in in the near-zone of array aperture. The antenna is realized by using microstrip antenna array with a beam-forming network based on Butler matrix. The radiation of array is focused in the near zone to avoid interferences resulted from […]

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A word prediction methodology for automatic sentence completion

Word prediction generally relies on n-grams occurrence statistics, which may have huge data storage requirements and does not take into account the general meaning of the text. We propose an alternative methodology, based on Latent Semantic Analysis, to address these issues. An asymmetric Word-Word frequency matrix is employed to achieve higher scalability with large training […]

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Method for On-line Detection of Arcing in Low Voltage Distribution Systems

This paper presents an algorithm for on-line detection of arcing in low voltage (230V, 50Hz) distribution systems. Electromagnetic radiation has been used as feature for discrimination between arc and non-arc signals. The output of electromagnetic radiation sensor has been analyzed in the spectral domain using Log-Spectral distance-metric for the detection of arcing. For validation of […]

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Cooperative localization by factor composition over a faulty low-bandwidth communication channel

This paper reports on an underwater cooperative localization algorithm for faulty low-bandwidth communication channels based on a factor graph estimation framework. Vehicles measure the one-way-travel-time (OWTT) of acoustic broadcasts to obtain a relative range observation to the transmitting vehicle. We present a method to robustly share locally observed sensor data across thenetwork by exploiting odometry factor […]

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A Secure Radio Environment Map Database to Share Spectrum

A robust and secure database for spectrum sharing in cognitive radio networks that is obscured from the viewpoint of secondary users is presented. The database allocations secure features of white space resource usage from being learned. The design of non-inferable database is based on two cases. In the first case, the primary or spectrum lender has no […]

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Small Cell Traffic Balancing Over Licensed and Unlicensed Bands

The 3rd Generation Partnership Project (3GPP) recently started standardizing the “Licensed-Assisted Access using LTE” for small cells, referred to as Dual Band Femtocell (DBF) in this paper, which uses LTE air interface in both licensed and unlicensed bands based on the Long Term Evolution (LTE) carrier aggregation feature. Alternatively, the Small Cell Forum introduced the […]

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