Showing 2821–2832 of 3871 results
Photovoltaic battery powered DC bus system form common portable electronic devices. Abstract?Renewable energy sources based on photo voltaic (PV) along with battery-based energy storage necessitate power conditioning to meet load requirements and/or be connected to the electrical grid. The power conditioning is achieved via a dc-dc converter and a DC-AC inverter stages to produce the…
Physical Layer Security in Ultra-Dense Networks Abstract-We study the Physical Layer Security (PLS) in Ultra-Dense Networks (UDNs) considering the close proximity of the users to the cells. In particular, we show the effect of the small cells? density, the users? density and the eavesdroppers? density on the average secrecy rate. To this end, stochastic geometry…
Pilot Allocation for Distributed-Compressed-Sensing-Based Sparse Channel Estimation in MIMO-OFDM Systems Abstract? the sparse channel estimation problem in multiple-input?multiple-output orthogonal frequencydivision multiplexing (MIMO-OFDM) systems from the perspective of distributed compressed sensing (DCS). It is focused on deterministic pilot allocation of MIMO-OFDM systems to improve the performance of DCS-based channel estimation. By transforming the problem of DCS-based…
Pilot Design for Sparse Channel Estimation in OFDM-Based Cognitive Radio Systems Abstract?Pilot Design for Sparse Channel Estimation in OFDM-Based Cognitive Radio Systems. In this correspondence, sparse channel estimation is first introduced in orthogonal frequency-division multiplexing (OFDM)-based cognitive radio systems. Based on the results of spectrum sensing, the pilot design is studied by minimizing the coherence…
Pilot Reduction Techniques for Sparse Channel Estimation in Massive MIMO Systems Abstract-The current high gain frequency division duplex (FDD) Massive multiple-input, multiple output (MIMO) systems pose several challenges to carry out the downlink beamforming. Specifically, downlink beamforming requires a channel estimation that usually needs long training and feedback overhead, scaling with the number of antennas…
PIS: A Multi-dimensional Routing Protocol for Socially-aware Networking Abstract?AbstractSocially-aware networking is an emerging paradigm for intermittently connected networks consisting of mobile users with social relationships and characteristics. In this setting, humans are the main carriers of mobile devices. Hence, their connections,social features, and behaviors can be exploited to improve the performance of data forwarding protocols….
PISA: Pixelwise Image Saliency by Aggregating Complementary Appearance Contrast Measures With Edge-Preserving Coherence Abstract?Abstract Driven by recent vision and graphics applications such as image segmentation and object recognition, computing pixel-accurate saliency values to uniformly highlight foreground objects becomes increasingly important. In this paper,we propose a unified framework called pixelwise image saliency aggregating (PISA) various bottom-up…
Placement and Performance Analysis of Virtual Multicast Networks in Fat-Tree Data Center Networks Abstract?Placement and Performance Analysis of Virtual Multicast Networks in Fat-Tree Data Center Networks.Virtualization of servers and networks is a key technique to resolve the conflict between the increasing demands on computing power and the high cost of hardware in data centers. In…
Plant Diseases Prediction Using Image Processing and Machine Learning Techniques: Survey Abstract-This survey literature discusses on mechanisms to early detect agricultural plant leaves? diseases for the quantitative and qualitative safety of the products using machine learning and image processing techniques. As a result, in this survey, different machine learning techniques, such as Artificial Neural Network,…
PMSE: A Personalized Mobile Search Engine Abstract? PMSE: A Personalized Mobile Search Engine. We propose a personalized mobile search engine (PMSE) that captures the users’ preferences in the form of concepts by mining their clickthrough data. Due to the importance of location information in mobile search, PMSE classifies these concepts into content concepts and location…
PMSE: A Personalized Mobile Search Engine Abstract?We propose a personalized mobile search engine (PMSE) that captures the users’ preferences in the form of concepts by mining their clickthrough data. Due to the importance of location information in mobile search,< Final Year Project > PMSE classifies these concepts into content concepts and location concepts. In addition,…
Development of a Combined Control System to Improve Performance of a PMSG Based Wind Energy Conversion System underNormal and Grid Fault Conditions Abstract-Fast transient and smooth steady state performance of wind energy conversion systems (WECSs) is essential for sustained power conversion and grid code fulfilment including low voltage ride through capability. In this paper, an…
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