The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
B. Hamidzadeh - One of the best experts on this subject based on the ideXlab platform.
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Optimal scheduling techniques for cluster tools with process-Module and Transport-Module residency constraints
IEEE Transactions on Semiconductor Manufacturing, 2002Co-Authors: S. Rostami, B. HamidzadehAbstract:This paper discusses two scheduling techniques for dual-arm cluster tools that address both process-Module and Transport-Module residency constraints and throughput requirements. The first technique is the extension of our previous work that only addressed process-Module residency constraints. For cases with long process times, this technique can take a long time to find the solution and is not practical. Hence, we use this algorithm mainly as a benchmark for comparison. The second technique that uses a linear programming technique with use of several heuristics can find the optimal solution very efficiently. Analytical and experimental analysis of this technique shows the correctness, completeness and efficiency of this technique.
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optimal scheduling techniques for cluster tools with process Module and Transport Module residency constraints
International Conference on Robotics and Automation, 2001Co-Authors: S. Rostami, B. HamidzadehAbstract:This paper discusses two scheduling techniques for dual-arm cluster tools that address both process Module and Transport-Module residency constraints and throughput requirements. The first technique is an extension of our previous work (2000) that only addressed process-Module residency constraints. For cases with long process times, this technique can take a long time to find the solution and is not practical. Hence, we use this algorithm mainly as a benchmark for comparison. The second technique that uses a linear programming method with several heuristics can find the optimal solution very efficiently. An analytical and experimental analysis of this technique shows the correctness, completeness and efficiency of this technique.
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ICRA - Optimal scheduling techniques for cluster tools with process-Module and Transport-Module residency constraints
Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164), 1Co-Authors: S. Rostami, B. HamidzadehAbstract:This paper discusses two scheduling techniques for dual-arm cluster tools that address both process Module and Transport-Module residency constraints and throughput requirements. The first technique is an extension of our previous work (2000) that only addressed process-Module residency constraints. For cases with long process times, this technique can take a long time to find the solution and is not practical. Hence, we use this algorithm mainly as a benchmark for comparison. The second technique that uses a linear programming method with several heuristics can find the optimal solution very efficiently. An analytical and experimental analysis of this technique shows the correctness, completeness and efficiency of this technique.
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SMC - An optimal scheduling technique for dual-arm cluster tools with buffer Modules
2001 IEEE International Conference on Systems Man and Cybernetics. e-Systems and e-Man for Cybernetics in Cyberspace (Cat.No.01CH37236), 1Co-Authors: S. Rostami, B. HamidzadehAbstract:In a cluster tool where process Modules have residency constraints, an optimal schedule may need to buffer the partially processed wafers. In previous approaches, one of the active resources (i.e. the Transport Module) was used as a temporary buffer. In this approach we try to use a resource that is usually available in cluster tools and is only used for tool maintenance reasons. This passive Module that we refer to as buffer Module, can hold the partially processed wafers, and free the Transport Module (TM). Our experiment shows that in 57% of the cases, because the TM can perform other actions while the wafer is buffered in the buffer Module, a schedule with better throughput was found.
S. Rostami - One of the best experts on this subject based on the ideXlab platform.
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Optimal scheduling techniques for cluster tools with process-Module and Transport-Module residency constraints
IEEE Transactions on Semiconductor Manufacturing, 2002Co-Authors: S. Rostami, B. HamidzadehAbstract:This paper discusses two scheduling techniques for dual-arm cluster tools that address both process-Module and Transport-Module residency constraints and throughput requirements. The first technique is the extension of our previous work that only addressed process-Module residency constraints. For cases with long process times, this technique can take a long time to find the solution and is not practical. Hence, we use this algorithm mainly as a benchmark for comparison. The second technique that uses a linear programming technique with use of several heuristics can find the optimal solution very efficiently. Analytical and experimental analysis of this technique shows the correctness, completeness and efficiency of this technique.
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optimal scheduling techniques for cluster tools with process Module and Transport Module residency constraints
International Conference on Robotics and Automation, 2001Co-Authors: S. Rostami, B. HamidzadehAbstract:This paper discusses two scheduling techniques for dual-arm cluster tools that address both process Module and Transport-Module residency constraints and throughput requirements. The first technique is an extension of our previous work (2000) that only addressed process-Module residency constraints. For cases with long process times, this technique can take a long time to find the solution and is not practical. Hence, we use this algorithm mainly as a benchmark for comparison. The second technique that uses a linear programming method with several heuristics can find the optimal solution very efficiently. An analytical and experimental analysis of this technique shows the correctness, completeness and efficiency of this technique.
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ICRA - Optimal scheduling techniques for cluster tools with process-Module and Transport-Module residency constraints
Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164), 1Co-Authors: S. Rostami, B. HamidzadehAbstract:This paper discusses two scheduling techniques for dual-arm cluster tools that address both process Module and Transport-Module residency constraints and throughput requirements. The first technique is an extension of our previous work (2000) that only addressed process-Module residency constraints. For cases with long process times, this technique can take a long time to find the solution and is not practical. Hence, we use this algorithm mainly as a benchmark for comparison. The second technique that uses a linear programming method with several heuristics can find the optimal solution very efficiently. An analytical and experimental analysis of this technique shows the correctness, completeness and efficiency of this technique.
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SMC - An optimal scheduling technique for dual-arm cluster tools with buffer Modules
2001 IEEE International Conference on Systems Man and Cybernetics. e-Systems and e-Man for Cybernetics in Cyberspace (Cat.No.01CH37236), 1Co-Authors: S. Rostami, B. HamidzadehAbstract:In a cluster tool where process Modules have residency constraints, an optimal schedule may need to buffer the partially processed wafers. In previous approaches, one of the active resources (i.e. the Transport Module) was used as a temporary buffer. In this approach we try to use a resource that is usually available in cluster tools and is only used for tool maintenance reasons. This passive Module that we refer to as buffer Module, can hold the partially processed wafers, and free the Transport Module (TM). Our experiment shows that in 57% of the cases, because the TM can perform other actions while the wafer is buffered in the buffer Module, a schedule with better throughput was found.
Shen Rui-min - One of the best experts on this subject based on the ideXlab platform.
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Video & Audio Transport Module in Video Conference Based on Satellite and CERNET
Computer Engineering, 2005Co-Authors: Shen Rui-minAbstract:This article describes the design and realization of video and audio Module in video conference system based on satellite and CERNET. It Transports video and audio data and relevant statistics information via RTP(real time protocol), realizes the mutual connection of video and audio data between satellite net and Internet, solves many problems such as delay and jitter, auto-adaptation to bandwidth and lip synchronization under the condition of narrow back-transfer bandwidth and asymmetry bi-direction channels.
Jos Lelieveld - One of the best experts on this subject based on the ideXlab platform.
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Revision of the convective Transport Module CVTRANS 2.4 in the EMAC atmospheric chemistry-climate model
Geoscientific Model Development, 2015Co-Authors: Huug G. Ouwersloot, Andrea Pozzer, Benedikt Steil, Holger Tost, Jos LelieveldAbstract:Abstract. The convective Transport Module, CVTRANS, of the ECHAM/MESSy Atmospheric Chemistry (EMAC) model has been revised to better represent the physical flows and incorporate recent findings on the properties of the convective plumes. The modifications involve (i) applying intermediate time stepping based on a settable criterion, (ii) using an analytic expression to account for the intra-time-step mixing ratio evolution below cloud base, and (iii) implementing a novel expression for the mixing ratios of atmospheric compounds at the base of an updraft. Even when averaged over a year, the predicted mixing ratios of atmospheric compounds are affected considerably by the intermediate time stepping. For example, for an exponentially decaying atmospheric tracer with a lifetime of 1 day, the zonal averages can locally differ by more than a factor of 6 and the induced root mean square deviation from the original code is, weighted by the air mass, higher than 40 % of the average mixing ratio. The other modifications result in smaller differences. However, since they do not require additional computational time, their application is also recommended.
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Revision of the convective Transport Module CVTRANS 2.4 in the EMAC atmospheric chemistry–climate model
2015Co-Authors: Huug G. Ouwersloot, Andrea Pozzer, Benedikt Steil, Holger Tost, Jos LelieveldAbstract:Abstract. The convective Transport Module, CVTRANS, of the ECHAM/MESSy Atmospheric Chemistry (EMAC) model has been revised to better represent the physical flows and incorporate recent findings on the properties of the convective plumes. The modifications involve (i) applying intermediate time stepping based on a settable criterion, (ii) using an analytic expression to account for the intra time step mixing ratio evolution below cloud base, and (iii) implementing a novel expression for the mixing ratios of atmospheric compounds at the base of an updraft. Even when averaged over a year, the predicted mixing ratios of atmospheric compounds are significantly affected by the intermediate time stepping. For example, for an exponentially decaying atmospheric tracer with a lifetime of 1 day, the zonal averages can locally differ by more than a factor of 6 and the induced root mean square deviation from the original code is, weighted by the air mass, higher than 40% of the average mixing ratio. The other modifications result in smaller differences. However, since they do not require additional computational time, their application is also recommended.
Krzysztof Broda - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Research on the Gas Phase Density Change in Processes Occurring During Work of the Transport Module Intended for Transport From the Seabed
New Trends in Production Engineering, 2018Co-Authors: Wiktor Filipek, Krzysztof BrodaAbstract:Abstract In recent years, we have observed a great interest in the exploitation of marine deposits by various methods of mining and Transport to the surface. However, obtaining natural resources deposited at greater depths such as polymetallic nodules and seafloor massive sulphides – SMS creates a lot of challenges for both scientists and engineers. The solutions developed so far, unfortunately, have so far been characterized by high energy consumption. For several years the authors have been conducting theoretical and experimental research on new concepts of seabed to surface Transport. The results of them have been presented in previous publications. This publication presents the results of the continuation of research on the concept of construction and operation of an autonomous Transport Module (submitted for printing). It focuses on a theoretical analysis of the change in gas phase density in the processes occurring during operation of the Transport Module intended for Transport from the seabed. For this purpose, a reduced form of the van der Waals equation was used in the form of a third-degree equation for parameters interested from the point of view of the Transport Module.
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Theoretical Research on the Stability of the Transport Module Intended for Transport from the Seabed
New Trends in Production Engineering, 2018Co-Authors: Wiktor Filipek, Krzysztof BrodaAbstract:Abstract The interest in sea mining has resulted in the recent years in the creation of many new methods for the exploitation of marine deposits as well as the Transport from the seabed to the. For several years, the authors have been trying to develop new concepts of Transport from the seabed. In previous publications, the authors presented the concept of an autonomous Transport Module for Transport from the seabed. The research so far has focused on the development of the Module’s operation principles, determination of the energy source in the Transport process and changes in the average density of the Transport Module. In this publication, the authors focused on the stability problem of the Transport Module during deployment and ascent. This is a very important issue, because the stability of the Module will determine its practical suitability for Transport from the seabed.
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Experimental Research on the Concept of Using an Autonomous Transport Module for Transport From the Seabed
New Trends in Production Engineering, 2018Co-Authors: Wiktor Filipek, Krzysztof BrodaAbstract:Abstract The great interest in the exploitation of sea deposits has in recent years resulted in the creation of many consortia conducting research on various methods of mining and Transport to the surface. Exploitation of the shelf areas of crude oil and gas as well as solid minerals is successfully carried out in many places around the world using various methods. More and more often, however, we want to obtain natural resources found at great depths such as polymetallic nodules and massive polymetallic sulphides. This puts much greater demands on scientists and engineers. Unfortunately, solutions developed so far are characterized by high energy consumption. For several years, the authors have been researching new concepts of Transport from the seabed. In previous years the authors presented theoretical research results of using a new method involving the use of pyrotechnic materials as a source of energy in Transport from the seabed from large depths and experimental ones with the use of potassium nitrate and ammonium nitrate in a controlled pyrotechnic reaction and they compared three conceptions of Transport of dredge spoil from the point of view of energy demand. This publication presents the results of the continuation of research, this time on the concept of building an autonomous Transport Module and its operating principles. The construction of the laboratory stand and the way of conducting experiments are discussed. The results of experimental research are presented, which confirm the possibility of using the discussed concept in Transport from the seabed.
