<span style="font-family: "Times New Roman","serif"; font-size: 10.5pt; mso-bidi-font-weight: bold; mso-fareast-language: ZH-CN; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">Self-Scheduling is a dynamic and adaptive loop scheduling approach to reduce the total execution time for a task running in the cluster or grid environment. This paper focuses on how to use and optimize Self-scheduling technologies to allocate tasks reasonable and achieve better parallel performance. It introduces the prediction algorithms and proposes a novel Chunk-based Task Runtime Prediction (CTRP) algorithm according to the characters of desk grid and multi-core environment. Our experimental results show that our approach can predict the execution time more accurate and achieve better load balancing than that of others when most slave nodes’ load is changing frequently and rulelessly in the multi-core desk grid.</span>
Enforcement of global cooperation urges the rapid growth of cooperative work. As a typical application of it, cooperative editing is widely used in many fields gradually, especially in knowledge intensive application. Workflow is a kind of automation technology by predefined process rules and tasks. It can bring us clarity in process control and management, which are two important facets in cooperative editing. Marriage of workflow and cooperation shows us an approach to achieve automation and convenient management as well as collaboration, thus gaining efficiency and regularity. We summarize the editing process flow as iterative phases including initializing, editing, coediting, reviewing and finalizing, which lays the foundation of incorporating workflow with cooperative editing. An activity-role based access control model, which uses activity to represent the editing task and uses role to effectively manage participants, is designed and applied in the workflow system. To get fine control grain, section, a logic part of the document, is used. We specially introduce the concept of subflow for section processing control and use section for cooperative editing control. To represent the workflow, we propose a workflow description language, which can be understood and processed by the workflow engine. As control logic in cooperative editing is quite different from that in individual editing, we put forward a novel workflow control algorithm, taking into account characteristics of cooperative editing. A temporal cooperative editing system applied the workflow system, showing it can deal with cooperative editing well, spare much human work, and offer clear process logic.
As the increasing number of access devices, and the complex and changeful of access site and the media, energy consumption of power distribution communication access networks is expected to further grow in the future, energy saving has become a key issue with the development of Passive Optical Networks (PONs). In this paper, we propose a Software Defined Distribution Optical Network (SD-DON) architecture, design an energy saving aware control strategy which support unified optimization and efficient scheduling from multi-domain perspective. Additionally, a Multi-Modes Hybrid Dynamic Bandwidth Allocation (MH-DBA) scheme are proposed and evaluated under SD-DON, in which, 4-saving modes and multi-period mixed adaptive dormancy method is designed to maximize energy saving of Optical Network Units (ONUs). Simulation results show that MH-DBA can significantly save energy under different traffic loads, and clearly outperform the conventional scheme.
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