Automated Optimization Methods For Scientific Workflows In E Science Infrastructures

Automated Optimization Methods for Scientific Workflows in e Science Infrastructures PDF Book Detail:
Author: Sonja Holl
Publisher: Forschungszentrum Jülich
ISBN: 389336949X
Size: 27.36 MB
Format: PDF, ePub
Category :
Languages : en
Pages : 182
View: 1481

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Book Description: Scientific workflows have emerged as a key technology that assists scientists with the design, management, execution, sharing and reuse of in silico experiments. Workflow management systems simplify the management of scientific workflows by providing graphical interfaces for their development, monitoring and analysis. Nowadays, e-Science combines such workflow management systems with large-scale data and computing resources into complex research infrastructures. For instance, e-Science allows the conveyance of best practice research in collaborations by providing workflow repositories, which facilitate the sharing and reuse of scientific workflows. However, scientists are still faced with different limitations while reusing workflows. One of the most common challenges they meet is the need to select appropriate applications and their individual execution parameters. If scientists do not want to rely on default or experience-based parameters, the best-effort option is to test different workflow set-ups using either trial and error approaches or parameter sweeps. Both methods may be inefficient or time consuming respectively, especially when tuning a large number of parameters. Therefore, scientists require an effective and efficient mechanism that automatically tests different workflow set-ups in an intelligent way and will help them to improve their scientific results. This thesis addresses the limitation described above by defining and implementing an approach for the optimization of scientific workflows. In the course of this work, scientists’ needs are investigated and requirements are formulated resulting in an appropriate optimization concept. In a following step, this concept is prototypically implemented by extending a workflow management system with an optimization framework, including general mechanisms required to conduct workflow optimization. As optimization is an ongoing research topic, different algorithms are provided by pluggable extensions (plugins) that can be loosely coupled with the framework, resulting in a generic and quickly extendable system. In this thesis, an exemplary plugin is introduced which applies a Genetic Algorithm for parameter optimization. In order to accelerate and therefore make workflow optimization feasible at all, e-Science infrastructures are utilized for the parallel execution of scientific workflows. This is empowered by additional extensions enabling the execution of applications and workflows on distributed computing resources. The actual implementation and therewith the general approach of workflow optimization is experimentally verified by four use cases in the life science domain. All workflows were significantly improved, which demonstrates the advantage of the proposed workflow optimization. Finally, a new collaboration-based approach is introduced that harnesses optimization provenance to make optimization faster and more robust in the future.

Collaborative Product Design And Manufacturing Methodologies And Applications

Collaborative Product Design and Manufacturing Methodologies and Applications PDF Book Detail:
Author: Wei Dong Li
Publisher: Springer Science & Business Media
ISBN: 1846288029
Size: 42.76 MB
Format: PDF, ePub, Mobi
Category : Technology & Engineering
Languages : en
Pages : 308
View: 7493

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Book Description: Collaborative Product Design and Manufacturing Methodologies and Applications introduces a wide spectrum of collaborative engineering issues in design and manufacturing. It offers state-of-the-art chapters written by international experts from academia and industry, and reflects the most up-to-date R & D work and applications, especially those from the last three to five years. The book will serve as an essential reference for academics, upper-level undergraduate and graduate students and practicing professionals.

Automatic Control In Aerospace 1992

Automatic Control in Aerospace  1992 PDF Book Detail:
Author: Daniel B. DeBra
Publisher: Pergamon
Size: 63.33 MB
Format: PDF
Category : Science
Languages : en
Pages : 553
View: 979

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Book Description: Space vehicles have become increasingly complex in recent years, and the number of missions has multiplied as a result of extending frontiers in the exploration of our planetary system and the universe beyond. The advancement of automatic control in aerospace reflects these developments. Key areas covered in these proceedings include: the size and complexity of spacecrafts and the increasingly stringent performance requirements to be fulfilled in a harsh and unpredictable environment; the merger of space vehicles and airplanes into space planes to launch and retrieve payloads by reusable winged vehicles; and the demand to increase space automation and autonomy to reduce human involvement as much as possible in manned, man-tended and unmanned missions. This volume covers not only the newly evolving key technologies but also the classical issues of guidance, navigation and control.

Oil Gas Science And Technology

Oil   Gas Science and Technology PDF Book Detail:
Size: 35.66 MB
Format: PDF, ePub, Docs
Category : Liquid fuels
Languages : en
Pages :
View: 4507

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Book Description: