Manufacturing Grid consists of a collection of heterogeneous resources across multiple administrative domains withthe intent of providing enterprises to realize resource sharing and collaboration. A comprehensive set...
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ISBN:
(纸本)0780390741
Manufacturing Grid consists of a collection of heterogeneous resources across multiple administrative domains withthe intent of providing enterprises to realize resource sharing and collaboration. A comprehensive set of Manufacturing Grid usage scenarios is presented and analyzed with regard to security requirements such as authentication, authorization, integrity, nonrepudition and confidentiality. the main value of these scenarios is to increase the awareness of security issues in Manufacturing Grid which are different from computational Grid. We take the unique security requirements of Manufacturing Grid into consideration and design a corresponding security solution. the implementation within the project of SMVPN (Shanghai Manufacturing Virtual Private Network) proves that the solution is workable and valuable.
the simulation of large grids requires the generation of grid instances and an approximation of grid components' behaviour To generate grid instances, this paper outlines a set of high-level properties of grids an...
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ISBN:
(纸本)0780390741
the simulation of large grids requires the generation of grid instances and an approximation of grid components' behaviour To generate grid instances, this paper outlines a set of high-level properties of grids and considers ways to assign values to those properties. the paper also brings together existing application-level network and host models and discusses how they are used for the simulation of large grids. A grid instantiation is described in detail as part of a master-slave case study, and a large grid is simulated for the evaluation of a variety of scheduling strategies. the case study also motivates a performance prediction method, which is assessed against simulation results.
this paper presents a distributed-computing technique based on a particle swarm optimization (PSO) algorithm for the parameter extraction of photovoltaic modules. the procedure exploits interlacing of the experimental...
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this paper presents a distributed-computing technique based on a particle swarm optimization (PSO) algorithm for the parameter extraction of photovoltaic modules. the procedure exploits interlacing of the experimental data in order to decrease the computational load, and parallelcomputing of different and independent runs to collect a large amount of data in order to save computational time. the statistical instability typical of numerical data fitting algorithms can thus be efficiently controlled.
Multiple-issue negotiations between autonomous software agents allow the alignment of resource consumers' demand projiles and the specific service capabilities of resource providers. To address the inefficiencies ...
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ISBN:
(纸本)0780390741
Multiple-issue negotiations between autonomous software agents allow the alignment of resource consumers' demand projiles and the specific service capabilities of resource providers. To address the inefficiencies of negotiations on imperfect markets, the negotiation model suggested here includes both self-interested negotiations driven by a heuristic strategy and a joint-gains approach to win/win-negotiations. the market based grid service allocation mechanism is based on negotiating agents that are aware of their environment and leverage strategrically relevant knowledge to maximize utility. the "GeneLab" simulation environment uses a genetic algorithm to find strong negotiation strategies and suitable knowledge processing rules.
While declustering methods for distributed multidimensional indexing of large datasets have been researched widely in the past, replication techniques for multidimensional indexes have not been investigated deeply. In...
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ISBN:
(纸本)0780390741
While declustering methods for distributed multidimensional indexing of large datasets have been researched widely in the past, replication techniques for multidimensional indexes have not been investigated deeply. In general, a centralized index server may become the performance bottleneck in a wide area network rather than the data servers, since the index is likely to be accessed more often than any of the datasets in the servers. In this paper we present two different multidimensional indexing algorithms for a distributed environment - a centralized global index and a two-level hierarchical index. Our experimental results show that the centralized scheme does not scale well for either insertion or searching the index. In order to improve the scalability of the index server we have employed a replication protocol for boththe centralized and two-level index schemes that allows some inconsistency between replicas without affecting correctness. Our experiments show that the two-level hierarchical index scheme shows better scalability for both building and searching the index than the non-replicated centralized index, but replication can make the centralized index faster than the two-level hierarchical index for searching in some cases.
In typical on demand grid computing scenarios, services from different organisations can potentially run in the same web service engine on a single grid node, making intra-engine service security vital for any product...
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ISBN:
(纸本)0780390741
In typical on demand grid computing scenarios, services from different organisations can potentially run in the same web service engine on a single grid node, making intra-engine service security vital for any production system. In this paper a solution to the problem of intra-engine inter-service security for ad hoc grid environments based on WSRF is presented. To ensure that only authorized access to grid services is possible from within other services' code, a dynamic group enabled sandboxing approach within Apache Axis is proposed to protect dynamically deployed grid services. It relies on the features provided by a hot deployment service developed for ad hoc grids. A prototypical implementation of the hot deployment service and the intra-engine service security approach based on the Globus Toolkit 4 (GT4) is used to demonstrate the feasibility of our approach.
Withthe principal goal of developing an alternative, relatively simple and tractable pricing framework for accurately reproducing a market implied volatility surface, this paper presents two new asset price return mo...
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ISBN:
(纸本)0769523439
Withthe principal goal of developing an alternative, relatively simple and tractable pricing framework for accurately reproducing a market implied volatility surface, this paper presents two new asset price return models for option pricing and calibration. We consider a class of hidden Markov models based on Markov switching and a mixture model that embeds two diffusion processes whereby the underlying asset price dynamics obeys a mixed state-dependent non-linear volatility model. In particular, we study the so-called two-state mixture CEV diffusion model. Among possible nonlinear mixed state-dependent models, this proposed model offers a good balance between computational tractability and multiple parameter flexibility in the calibration process. the model also captures most of the empirical features such as leptokurtosis and volatility clustering of asset price returns. We present efficient higher order multinomial lattice methods for calibrating our model and for pricing European and American style equity options. Finally, we discuss two parallel algorithms for implementing the lattice methods: the shared memory and distributed memory algorithms.
In parallel programming model, MPI seems to have established its position, and OpenMP is extensively investigated as the next standard. However OpenMP is not so efficient for clusters. Using GpenMP on clusters causes ...
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ISBN:
(纸本)0780390741
In parallel programming model, MPI seems to have established its position, and OpenMP is extensively investigated as the next standard. However OpenMP is not so efficient for clusters. Using GpenMP on clusters causes more performance degradation than using SDSMs directly, because most of the OpenMP implementations for clusters use SDSMs in their under layer this paper presents the performance evaluation of new portable parallel programming interface MpC, Meta process C It is a minimal extension of ANSI C and its AN also becomes a universal API for various SDSMs and pthread. the MpC is based on Meta Process Model. the Meta Process Model is a parallel programming paradigm based on a hierarchical shared memory model and an explicit description of parallelism. the model introduces 'shared' data that can be accessed by all processes in one Meta Process and distinguishes process-local and process-shared data explicitly. Using a hierarchical data scope, the process-local data are practically prohibited to be accessed by other processes. the paper summarizes the model feature, and compares performance and productivity of MpC with other languages, GpenMP and UPC. It also proves good portability of MpC programs for clusters andsharedmemory machines.
In recent years, e-Learning has become a popular method of learning. Generally, an e-Learning Platform which provided multi-media content required a high capacity storage device such as NAS (Network Attached Storage) ...
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Grid middleware such as the Globus toolkit and grid standards such as the Open Grid Services Architecture (OGSA) are intended to be expressive enough for building distributed enterprise applications, yet their use in ...
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ISBN:
(纸本)0780390741
Grid middleware such as the Globus toolkit and grid standards such as the Open Grid Services Architecture (OGSA) are intended to be expressive enough for building distributed enterprise applications, yet their use in this context remains largely unexplored. Here, two specific issues related to the use of grid technology for web application systems, an important class of enterprise applications, are examined. the first is whether existing middleware can be used to move legacy web applications to a grid platform, and if so, how;the second is whether such grid-enabling brings advantages in terms of additional functionality, enhanced performance, or simplified management. these issues are addressed by grid-enabling a sample J2EE Internet banking application and comparing its performance withthe original version, and then designing a scalable software architecture that can use the dynamic resource allocation facilities of grids to handle fluctuating client demands. Initial performance studies suggest that the architecture can indeed scale in response to changes in client load, indicating that the application of grid technology in this context is potentially useful as a way to enhance the manageability of the overall system.
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