this paper describes that under certain operations, the parallel Pulse transmission behavior of Unit-linking PCNN (Pulse Coupled Neural Network) for image processing, which we have developed from PCNN based on biologi...
详细信息
ISBN:
(纸本)7121002159
this paper describes that under certain operations, the parallel Pulse transmission behavior of Unit-linking PCNN (Pulse Coupled Neural Network) for image processing, which we have developed from PCNN based on biological experimental results. is equal to the open operation of mathematic morphology. the open operation of Unit-linking PCNN based on its parallel pulse transmission behavior call be efficiently used for image processing, such as reducing the pulse noise of binary images. A new pulse-noise-reducing approach based on the open operation of Unit-linking PCNN is proposed in this paper. the results of computer simulations show that the visual effects of retrieval images of binary pulse-noise images based on the open operation of Unit-linking PCNN are better than those based oil the median filter, a tradition approach for reducing image pulse noise. For binary images polluted by any other kinds of noise, such as white Guassian noise, after having turned the original noisy images into binary noisy images using the approach proposed in this paper also can reduce the noise. this paper bridges the gap between image processing based on mathematical morphology and image processing based on Unit-linking PCNN.
We propose Advanced Multi-Components Expansion Method (AMCEM), which is a modification method of Lattice Boltzmann Method (LBM) to obtain multi-components LBM model from single component LBM model. this modification m...
详细信息
ISBN:
(纸本)076952138X
We propose Advanced Multi-Components Expansion Method (AMCEM), which is a modification method of Lattice Boltzmann Method (LBM) to obtain multi-components LBM model from single component LBM model. this modification method has advantages in point of flexible application to various LBM models and possibility of coupling different LBM models. In this paper, we show an overview and verify analytical conservations of physical quantities and numerical results of AMCEM. Furthermore, we discuss parallel performance of AMCEM.
More and more communication systems call for an efficient FFT component. this paper implements a real-time FFT processor that perform 1K points FFT, and with our strategy, we realize a 16K points FFT processor only en...
详细信息
ISBN:
(纸本)078038511X
More and more communication systems call for an efficient FFT component. this paper implements a real-time FFT processor that perform 1K points FFT, and with our strategy, we realize a 16K points FFT processor only enlarge the memories and the counter in controller. At last, we implemented an FFT processor with Xilinx VirtexII FPGA, which can perforin 1K, 2K, 4K, 8K and 16K respectively corresponding with external configuration. the system clock is 50MHz, which means that our FFT processor can accomplish a 16K complex point FFT in 40ns.
Many advances in automatic parallelization and optimization have been achieved through the polyhedral model. It has been extensively shown that this computational model provides convenient abstractions to reason about...
详细信息
ISBN:
(纸本)0769522297
Many advances in automatic parallelization and optimization have been achieved through the polyhedral model. It has been extensively shown that this computational model provides convenient abstractions to reason about and apply program transformations. Nevertheless, the complexity of code generation has long been a deterrent for using polyhedral representation in optimizing compilers. First, code generators have a hard time coping with generated code size and control overhead that may spoil theoretical benefits achieved by the transformations. Second, this step is usually time consuming, hampering the integration of the polyhedral framework in production compilers or feedback-directed, iterative optimization schemes. Moreover current code generation algorithms only cover a restrictive set of possible transformation functions. this paper discusses a general transformation framework able to deal with non-unimodular non-invertible, non-integral or even non-uniform functions. It presents several improvements to a state-of-the-art code generation algorithm. Two directions are explored: generated code size and code generator efficiency. Experimental evidence proves the ability of the improved method to handle real-life problems.
the particle swarm optimization (PSO) algorithm, which originated as a simulation of a simplified social system, is an evolutionary computation technique. In this paper the binary and real-valued versions of PSO algor...
详细信息
ISBN:
(纸本)0769521355
the particle swarm optimization (PSO) algorithm, which originated as a simulation of a simplified social system, is an evolutionary computation technique. In this paper the binary and real-valued versions of PSO algorithm are exploited in two important signal processing paradigm: multiuser detection (MUD) and blind extraction of sources (BES), respectively. the novel approaches are effective and efficient withparallelprocessing structure and relatively feasible implementation. Simulation results validate either PSO-MUD or PSO-BES has a significant performance improvement over conventional methods.
At the time of nuclear emergency, it is important to identify the type and the cause of the accident. Besides withthese, it is also important to provide adequate information for the emergency response organization to...
详细信息
ISBN:
(纸本)076952138X
At the time of nuclear emergency, it is important to identify the type and the cause of the accident. Besides withthese, it is also important to provide adequate information for the emergency response organization to support decision making by predicting and evaluating the development of the event and the influence of the release of radioactivity for the environment. Recently, a new type of nuclear disaster prevention support system called MEASURES (Multiple Radiological Emergen"cy Assistance System for Urgent Response) was developed which provides not only the current state of the nuclear power plant and the influence of the radioactivity for the environment, but also the future prediction of the accident development. In order to provide the accurate results of these analyses quickly, MEASURES utilizes the various technique, such as multiple nesting method which narrows down the calculation area gradually, and parallelprocessing computer for three dimensional analyses, such as air current distribution analysis. In this paper, the outline and the feature of MEASURES are presented, especially focused on the usage of parallelprocessing computer for the three dimensional air current distribution analysis.
Due to advances in fiber-optics and VLSI technology, interconnection networks which allow multiple simultaneous broadcasts are becoming feasible. this paper presents the multiprocessor architecture of the Simultaneous...
详细信息
Due to advances in fiber-optics and VLSI technology, interconnection networks which allow multiple simultaneous broadcasts are becoming feasible. this paper presents the multiprocessor architecture of the Simultaneous Optical Multiprocessor Exchange Bus (SOME-Bus), and examines the performance of representative algorithms for matrix operations, merging and sorting. using the message-passing and distributed-shared-memory paradigms. It shows that simple enhancements to the network interface and the cache and directory controllers can result in communication time of 0(l) for the matrix-vector multiplication algorithm using DSM. the SOME-Bus is a low-latency, high-bandwidth, fiber-optic interconnection network which directly links arbitrary pairs of processor nodes without contention, and can efficiently interconnect over 100 nodes. It contains a dedicated channel for the data output of each node, eliminating the need for global arbitration and providing bandwidththat scales directly withthe number of nodes in the system. Each of P nodes has an array of receivers, with one receiver dedicated to each node output channel. No node is ever blocked from transmitting by another transmitter or due to contention for shared switching logic. the entire P receiver array can be integrated on a single chip at a comparatively minor cost resulting in O(P) complexity. the SOME-Bus has much more functionality than a crossbar by supporting multiple simultaneous broadcasts of messages, allowing cache consistency protocols to complete much faster. (C) 2003 Elsevier B.V. All rights reserved.
DSP is widely used and it has the best prospect. At present, DSP software developing is becoming larger and larger. With different DSP processors having their own architecture and assembly language, it is very difficu...
详细信息
ISBN:
(纸本)7121002159
DSP is widely used and it has the best prospect. At present, DSP software developing is becoming larger and larger. With different DSP processors having their own architecture and assembly language, it is very difficult to port in application written in the assembly language of one processor to that of others. this problem has been resolved by designing an independent Virtual Architecture and Language. the DSP Virtual Machine (DSP VMTM (TM)) is coming up as a promising solution to the technology problems encountered in the above methodologies.
the fundamental issues involved with Reconfigurable computing (RC) are discussed. It is found that a rapidly increasing percentage of programmers implements code for embedded systems. Coarse drain datapath array platf...
详细信息
ISBN:
(纸本)076952138X
the fundamental issues involved with Reconfigurable computing (RC) are discussed. It is found that a rapidly increasing percentage of programmers implements code for embedded systems. Coarse drain datapath array platforms along with FPGA are available commercially along with application development tools. A RC old boys;network together with colleagues form 'classical CS' can provide a good chance to become successful trailblazers.
this paper presents a solution for efficient many-to-many communication over switched Ethernet. the performance of using an ordinary switch and an intelligent switch is compared, and the results of the analysis based ...
详细信息
this paper presents a solution for efficient many-to-many communication over switched Ethernet. the performance of using an ordinary switch and an intelligent switch is compared, and the results of the analysis based on 100 Mbit/s fast Ethernet show that an intelligent switch used to handle many-to-many communication can give better performance (shorter latency and higher utilization) than an ordinary switch. We also extend the network to serve many-to-many traffic with real-time demands by adding a thin software layer to the intelligent Ethernet switch and the end-nodes. Earliest deadline first (EDF) scheduling is used.
暂无评论