This paper presents a data-parallel formulation for N−body simulations using the Barnes-Hut method. The tree-structured problem is first linearized by using space-filling curves. This process allows us to use standard...
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“Team Sweden” is the Swedish national team that entered the Sony legged robot league at the RoboCup ’99 and RoboCup 2000 competitions. We had two main requirements in mind when preparing ...
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(纸本)3540421858
“Team Sweden” is the Swedish national team that entered the Sony legged robot league at the RoboCup ’99 and RoboCup 2000 competitions. We had two main requirements in mind when preparing our entries: 1. The entry should effectively address the specific challenges present in this domain; in particular, it should be able to tolerate errors and imprecision in perception and execution; and 2. it should illustrate our research in autonomous robotics, by incorporating general techniques that can be reused in different robots and environments. While the first requirement could have been met by writing some ad hoc competition software, the second one led us to develop principled solutions that drew upon our current research in robotics, and that pushed it further ahead.
This paper aims at developing a fully automated hull form design technique employing an Neural Network and Genetic Algorithm methods resulting in accelerated convergence. For generating an input data that will be, by ...
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The primary objective of the Multimedia Router (MMR) project is the design and implementation of a compact router optimized or multimedia applications. The router is targeted for use in cluster and LAN interconnection...
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Woven Stories is a web-based application that allows users to compose their stories, and link appropriate story sections with pre- existing sections authored by someone else. As a co-authoring environment, Woven Stori...
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Differentiated Services (DiffServ), which are currently being standardized in the IETF DiffServ working group, is a solution that can provide different qualities of service to different network users. DiffServ aggrega...
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The Internet explosion impels the extensive demands for distributed multimedia presentations (DMPs), which provide multiple users with QoS-controlled multimedia services under multicast communications, such as media d...
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As a coding technique designed for use with multiple transmit antennas, space-time coding (STC) has been gaining more and more attention recently due to its attractive characteristics to provide diversity at the recei...
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As a coding technique designed for use with multiple transmit antennas, space-time coding (STC) has been gaining more and more attention recently due to its attractive characteristics to provide diversity at the receiver and coding gain over an uncoded system without sacrificing the bandwidth, and increase the effective transmission rate as well as the potential system capacity. This paper presents powerful and computationally linear intersymbol and cochannel interference suppression schemes, considering both zero-forcing (ZF) and minimum mean-square error (MMSE) criteria to combat intersymbol interference (ISI) and suppress cochannel interference (CCI) and obtain diversity gain in a system with transmit diversity technique using symbol-level space-time block coding (STBC). General linear schemes are derived for the transmit diversity case with two transmit antennas and M receive antennas. The conditions are investigated under which interference can be suppressed perfectly using linear FIR filters in noise-free environments. Binary phase shift keying (BPSK) modulation scheme is assumed to simulate the proposed diversity and interference suppression methods. Numerical results show significant performance improvements compared to the cases without interference suppression.
As a coding technique designed for use with multiple transmit antennas, space-time coding (STC) has been gaining more and more attention recently due to its attractive characteristics to provide diversity at the recei...
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As a coding technique designed for use with multiple transmit antennas, space-time coding (STC) has been gaining more and more attention recently due to its attractive characteristics to provide diversity at the receiver and coding gain over an uncoded system without sacrificing the bandwidth, and increase the effective transmission rate as well as the potential system capacity. This paper presents powerful and computationally linear and decision feedback equalization schemes, considering both zero-forcing (ZF) and minimum mean-square error (MMSE) criteria to combat intersymbol interference (ISI) and obtain diversity gain in a system with transmit diversity technique using symbol-level space-time block coding. General linear and decision feedback equalizers are derived for the transmit diversity case with two transmit antennas and M receive antennas. The conditions are investigated under which FIR channels can be equalized perfectly using linear FIR filters in noise-free environments. BPSK modulation scheme is assumed to simulate the proposed diversity and equalization methods. Numerical results show significant performance improvements compared to the cases without equalization.
Optimum partitioning plays a crucial role in the implementation of systems on heterogeneous target architectures. Typical target architectures for such systems include FPGAs, semi-custom or physically optimized ASICs ...
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