the development of real-time distributedapplications requires middleware providing both reliability and performance. Middleware must be adaptable to meet application requirements and integrate legacy components. Curr...
详细信息
the distribution of computational load among several nodes is an important step for problems requiring High Performance computing(HPC). this phase is critical because bad decisions could cost time and money. the emerg...
详细信息
OGSA-DQP is a distributed query processor exposed to users as an Open Grid Services Architecture (OGSA)-compliant Grid service. this service supports the compilation and evaluation of queries that combine data obtaine...
详细信息
this paper presents a large scale block-based Gauss-Jordan algorithm to invert very large dense matrices. this version proposes to exploit peer-to-peer (P2P) platforms with increasingly large sets of distributed heter...
详细信息
Metacomputing aims at using the computing power of computers linked by networks for various applications, which used to be tackled by dedicated supercomputers a few years ago. Web-based metacomputing offers a cheap an...
详细信息
Metacomputing aims at using the computing power of computers linked by networks for various applications, which used to be tackled by dedicated supercomputers a few years ago. Web-based metacomputing offers a cheap and efficient solution for parallel and distributedcomputing by exploiting idle cycles from the Internet. Research literatures have been published to report the state of the art of metacomputing by addressing the developed prototypes architecture, support methodologies and technologies, programming APIs, example benchmarks and experimental performances. this work tries to answer the question: why the metacomputing system is undesirable in performance, applicability and reliability. In this work, the system's components are modelled as three roles: client, worker and manager. their performances are individually investigated in terms of the theory of constraint: objectives, requirements, prerequisites, conflicts and injections for identifying core problems and exploring efficient solutions. the main contribution of this work is to be a very first literature as conceptual guidelines for design and optimisation of metacomputing systems.
It is the purpose of this paper to present some practical security issues related to National High Performance computing Environment (NHPCE), the computational grid. Based on the security requirements of NHPCE we disc...
详细信息
ISBN:
(纸本)0780378407
It is the purpose of this paper to present some practical security issues related to National High Performance computing Environment (NHPCE), the computational grid. Based on the security requirements of NHPCE we discuss some existing distributed security technologies we used and point out why they are not enough. then the key issues of NHPCE and its corresponding solutions to these problems are analyzed. Lastly we put forward our final solution.(8).
Using parallel Geographic Image Processing System, the flooding disaster will be monitoring and evaluating in time. Using ParGIP to establish background database and process RS images, we can get the losses of the dis...
详细信息
ISBN:
(纸本)0780378407
Using parallel Geographic Image Processing System, the flooding disaster will be monitoring and evaluating in time. Using ParGIP to establish background database and process RS images, we can get the losses of the disaster by overlaying operation in 24 hours. According to the experiment in the Poyang Lake region, this method can promote the speed and the efficiency of the monitoring and evaluating of flooding disaster to several times.
this paper introduces the numerical parallel computation of geometrical ray-tracing. By analyzing the model of ray-tracing and using some parallel techniques, such as strategy of "Divide and Conquer" to desi...
详细信息
ISBN:
(纸本)0780378407
this paper introduces the numerical parallel computation of geometrical ray-tracing. By analyzing the model of ray-tracing and using some parallel techniques, such as strategy of "Divide and Conquer" to design a geometrical ray-tracing parallel program with MPI mode. the numerical simulation computation results of parallel program on PC-cluster platform and HPC (high performance computer) with DSM structure both show a great increase of computing speed and speedup ratio, the algorithm is proved efficient.
Semantic annotation plays a central role in building Semantic Web, which in general could be completed by committing a web resource to a domain ontology. However, there exist many circumstances in which semantic annot...
详细信息
ISBN:
(纸本)0780378407
Semantic annotation plays a central role in building Semantic Web, which in general could be completed by committing a web resource to a domain ontology. However, there exist many circumstances in which semantic annotation needs more than one ontologies In this paper, we propose an approach based distributed Description Logics(DDL) with intention to deal withthese circumstances, in which ontologies form a distributed system, and no extra conditions and. changes are imposed to those component ontologies.
Due to the increased complexity of applications, the distributed hierarchy architecture of clusters and the deficiency of efficient compiling strategies, developing efficient applications for large-scale scientific an...
详细信息
ISBN:
(纸本)0780378407
Due to the increased complexity of applications, the distributed hierarchy architecture of clusters and the deficiency of efficient compiling strategies, developing efficient applications for large-scale scientific and engineering computing on clusters is difficult. Our strategy to address this problem is to extend a generic data-parallel programming environment with an extensible component library. A component is a reusable routine that can be called by an alias in applications to perform some specific computation. All algorithmic and programming complexity as well as the specialized knowledge required to implement and optimize the computation are encapsulated in the routine. the alias is provided to the programming model as an extended operator for end users to develop new applications. Programmers use data-parallel construct and high-level operators to specify applications and its parallelism, and rely on sophisticated implementations of these programming systems to ensure that applications achieve high performance.
暂无评论