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Interpolative Multiresolution Coding of Advanced TV with Subchannels
2006The evolution of the current television standards toward increased quality and realism builds on higher spatial resolution, wider aspect ratio, better chroma resolution, digital audio (CD–quality) and possibly a new scanning format. In addition to the high bandwidth requirements, transmission systems for advanced television face the challenge that the ...
K. Metin Uz +2 more
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Opportunistic Subchannel Scheduling for OFDMA Networks with Network Coding at Relay Stations
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010In this paper, we study an opportunistic subchannel scheduling problem for the relay-based OFDMA cellular network where relay stations (RSs) can perform opportunistic network coding with downlink and uplink sessions of a mobile station (MS). In wireless networks, network coding is one of promising techniques to improve network performance in various ...
Byung-Gook Kim, Jang-Won Lee 0001
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The investigation of thermal hydraulic performance, either operating-steady-state or accident-transient conditions of nuclear reactor core, constitutes the topic of the present chapter. Standard nuclear thermal hydraulic equations and models, i.e., adopted for accident analysis in primary circuit and discussed in different chapters of the book, are ...
Ninokata H. +2 more
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Ninokata H. +2 more
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Bit and Power Allocation for Goodput Optimization in Coded Parallel Subchannels With ARQ
IEEE Transactions on Signal Processing, 2008This paper addresses the problem of adaptively allocating the bits and the power among a set of parallel subchannels. A frame-oriented transmission with convolutional coding, hard Viterbi decoding, and automatic repeat request (ARQ) retransmission protocol is considered.
Bertrand Devillers +2 more
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SCWR subchannel code ATHAS development and CANDU-SCWR analysis
Nuclear Engineering and Design, 2009Abstract A subchannel code (ATHAS) is developed for preliminary analyses of flow and enthalpy distributions and cladding temperatures at supercritical water conditions. The code is applicable for transient and steady state calculations. A number of heat-transfer correlations, frictional resistance correlations, and mixing models have been implemented
Jianqiang Shan +3 more
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Subchannel analysis by the FIDAS code based on the three-fluid model
Nuclear Engineering and Design, 1991Abstract The Film Dryout Analysis Code in Subchannels, FIDAS, has been developed with the main objective of predicting dryout and post-dryout heat transfer in channels and in rod bundles. In FIDAS, two-phase flow consisting of a continuous liquid film, continuous vapor and entrained droplets is modeled by a three-fluid, three-field representation of ...
Satoru Sugawara +3 more
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A parallelization approach to the COBRA-TF thermal-hydraulic subchannel code
SNA + MC 2013 - Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo, 2014In order to reduce the response time when simulating large reactors in detail, we have developed a parallel version of the thermal-hydraulic subchannel code COBRA-TF, with standard message passing technology (MPI). The parallelization is oriented to reactor cells, so it is best suited for models consisting of many cells.
Enrique Ramos +3 more
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Application of the Improved Spacer Grid Model in Subchannel Analysis Code
Nuclear Technology, 2018AbstractIn most subchannel analysis codes, spacer grids are simulated using an effective loss coefficient that can account only for the spacer grid’s mean axial effect on the pressure drop. Since the mixing vane spacer grid (MVG) in a rod bundle has great influence on local flow fields, neglecting the effect of mixing vanes will degrade fidelity and ...
Siying Dong +3 more
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Cognitive multicast (CoCast) in vehicular networks using OFDM subchannels and network coding
2012 International Conference on Computing, Networking and Communications (ICNC), 2012The deployment of wireless multicast in vehicular networks using the ISM band is challenging due to the interference from residential WiFi users. Recently developed cognitive radio techniques can help overcome such interference, with spectrum sensing and multi-channel assignment.
Wooseong Kim +3 more
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Transient 3D Stability Analysis of SCWR Rod Bundle Subchannels by a CFD Code
Volume 3: Thermal Hydraulics; Instrumentation and Controls, 2008The paper describes the application of CFD in simulating density wave oscillations in triangular and square pitch rod bundles. The FLUENT code is used for this purpose, addressing typical conditions proposed for SCWR conceptual design. The RELAP5 code and an in-house 1D linear stability code are also adopted to compare the results for instability ...
Sharabi M. +4 more
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