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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Many distributed applications executed on networks of workstations (NOWs) require the interconnection network to provide some quality of service (QoS) support. These networks must be able to support topology changes (...
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Networks of Workstations (NOWs) are usually arranged as a set of interconnected switches with hosts connected to switch ports through interface cards. Several commercial interconnects for high-speed NOWs use up✶/down✶...
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Software visualization is an area of computerscience devoted to supporting the understanding and effective use of algorithms. The application of software visualization to Evolutionary Computation has been receiving i...
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computer architects increasingly depend on the use of software tools to evaluate and investigate the design of computer systems. It is therefore very important that educators in this field promote extensive tool-based...
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ISBN:
(纸本)9781450347303
computer architects increasingly depend on the use of software tools to evaluate and investigate the design of computer systems. It is therefore very important that educators in this field promote extensive tool-based student experimentation in architecture classes. However, the integration of today's complex architecture tools into curricula poses several challenges to an instructor, including management of powerful computing resources, software installation and maintenance, and development of tool-specific educational material. This paper describes how these challenges are addressed by a universally accessible network-computing infrastructure - NETCARE - that provides educators with a Web portal to access computing resources, executable tools and educational material. Copyright held by author.
Distributed robotics uses multiple robots through coordination of task to solve problems. Developing a distributed robotic system introduces a number of challenges, one of which is the intra-robot communication and ne...
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Distributed robotics uses multiple robots through coordination of task to solve problems. Developing a distributed robotic system introduces a number of challenges, one of which is the intra-robot communication and networking of data and commands. Due to the characteristics of the targeted robotic missions and environments, the wireless networking requirements impose stringent constraints in terms of available memory, processing, and power consumption. Designing under these constraints and still providing support for such functions as synchronous commands and proxy processing is the true challenge. This paper discusses research in providing a lightweight wireless routing/networking solution that can dynamically tune the intra-robotic networking to adapt to the robotic team's mission needs and the environment situation encountered.
In order to eliminate limitations of conventional modeling and dynamic prediction methods, multilayer dynamic forward networks are considered as the models of oil field systems, the prediction models and technology of...
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In order to eliminate limitations of conventional modeling and dynamic prediction methods, multilayer dynamic forward networks are considered as the models of oil field systems, the prediction models and technology of multilayer dynamic forward networks are studied. The deficiency of a recursive prediction error learning algorithm is analysed. An improvement scheme is given. So, the algorithm performance is improved. Thus the method of modeling and prediction for an oil field is renewed. During using the new scheme, excellent results have been obtained which proves that the new scheme is very effective.
As IPC mechanisms become faster, stub-code efficiency becomes a performance issue for local client/server RPCs and inter-component communication. Inefficient and unnecessary complex marshalling code can almost double ...
As IPC mechanisms become faster, stub-code efficiency becomes a performance issue for local client/server RPCs and inter-component communication. Inefficient and unnecessary complex marshalling code can almost double communication costs. We have developed an experimental new IDL compiler that produces near-optimal stub code for gcc and the L4 microkernel. The current experimental IDL4 compiler cooperates with the gcc compiler and its x86 code generator. Other compilers or target machines would require different optimizations. In most cases, the generated stub code is approximately 3 times faster (and shorter) than the code generated by a commonly used portable IDL compiler. Benchmarks have shown that efficient stubs can increase application performance by more than 10 percent. The results are applied within IBM's SawMill project that aims at technology for constructing multi-server operating systems.
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