We compare two field demonstrations of SPECTS-OCDMA on an 80.8-km link and 150-km link using integrated, polarization independent arrayed-waveguide grating (AWG)-based encoders/decoders, an ultra-stable optical freque...
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We compare two field demonstrations of SPECTS-OCDMA on an 80.8-km link and 150-km link using integrated, polarization independent arrayed-waveguide grating (AWG)-based encoders/decoders, an ultra-stable optical frequency comb generator and a tunable dispersion-slope compensator.
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation pr...
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Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a Hybrid-Structure Routing Protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection problem. A virtual cluster structure based on grid structure information is also built. The hybrid-structure can establish a local shortest routing path from mobile sink toward to source. Simulation results indicate that the proposed HSRP mechanism reduces about 28% energy consumption than other approach. Moreover, HSRP mechanism reduces average delay time, increases higher success ratio, and has a longer network lifetime.
In this paper, we present a robust approach of digital watermarking embedding and retrieval for digital *** new approach works in special domain and it has two major steps: (1) to extract affine co-variant regions, an...
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In this paper, we present a robust approach of digital watermarking embedding and retrieval for digital *** new approach works in special domain and it has two major steps: (1) to extract affine co-variant regions, and (2) to embed watermarks with a novel fuzzy inference *** advantage of this proposed approach is demonstrated by a large amount of experiments, which are mainly against different attacks, such as common image processing, rotation, scaling, cropping, and several other affine transformations.
Through comprehensively utilizing color spectrum, texture and shape feature of the remote sensing images, a novel method of image classification is presented based on the fractal theory and ridgelet neural network. Th...
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Through comprehensively utilizing color spectrum, texture and shape feature of the remote sensing images, a novel method of image classification is presented based on the fractal theory and ridgelet neural network. The blue, green and red band spectrums is used as three-band-spectral characteristics, the DBC dimension and multi-fractal dimension calculated by fractal theory as two texture characteristics, the average unchanged moment as one shape feature, and the ridgelet neural network with a strong ability to identify the direction of curve is used as classifier in the proposed method. The experimental results indicated that the method used in color image classification has a high accurate rate and a strong antinoise ability.
The three articles in this special section are an open call for papers that address the following topics: unified spectrum management; soft-decision in UMTS systems; and polar transmitters for wireless communications.
The three articles in this special section are an open call for papers that address the following topics: unified spectrum management; soft-decision in UMTS systems; and polar transmitters for wireless communications.
An embedded 8b RISC for advanced memories is designed to control, analyze and optimize the memory timing and voltage parameters. The processor-based built-in-self-optimize (BISO) algorithm is proposed to enhance the m...
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An embedded 8b RISC for advanced memories is designed to control, analyze and optimize the memory timing and voltage parameters. The processor-based built-in-self-optimize (BISO) algorithm is proposed to enhance the memory yield. A test PRAM with the RISC is fabricated in 90nm, 3-metal diode-switch process. By applying BISO, the PRAM margin window increases by 221%. It operates at 100MHz and consumes 28.4mW at 1.0V supply voltage. The embedded RISC enables 100Mb/s/pin read/write throughputs to PRAM.
The deployment of symmetric NAT makes the communication between hosts in a peer-to-peer application very difficult, which needs many relay node to provide NAT traversal service. Traditional relay nodes are all server ...
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The deployment of symmetric NAT makes the communication between hosts in a peer-to-peer application very difficult, which needs many relay node to provide NAT traversal service. Traditional relay nodes are all server hosts lie in the edge of network. To reduce the duplicate traffic and excess router load caused by server relaying, a UDP switch based router enhanced NAT method is proposed in this paper, which can resolve the bottleneck of network bandwidth by enhance router function independently.
This article presents an incremental and scalable solution for tracing Denial of Service (DoS) and Distributed DoS (DDoS) attacks. Our approach allows the victim to identify the network paths traversed by attack traff...
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ISBN:
(纸本)0977520005
This article presents an incremental and scalable solution for tracing Denial of Service (DoS) and Distributed DoS (DDoS) attacks. Our approach allows the victim to identify the network paths traversed by attack traffic without requiring the support from ISP or knowledge of the network topology. In contrast to previous probabilistic packet marking work, our approach has no false positive and fixed computation overhead for the victim to reconstruct the attack paths. Furthermore, the volume of attack packets required to reconstruct the attack path is dramatically less.
A low power 16-bit RISC is proposed for body sensor network system. The proposed IPEEP scheme provides zero overhead for the wakeup operation. The lossless compression accelerator is embedded in the RISC to support th...
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Variable length decoding(VLD) is inherent bit-serial operation and is the first stage of the whole video decoding task, the overall decoding system performance is determined by its throughput and efficiency. In this p...
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