Results 261 to 270 of about 60,189 (305)

Transforming an MRP plan into a short-term schedule

Production Planning & Control, 2003
A new approach for transforming MRP orders, planned periodically, e.g. on a weekly base, into a detailed sequence of jobs is presented. In this model for a single machine environment, the jobs are partitioned into families and a family specific set-up time is required at the start of each period and of each batch, where a batch is a maximal set of jobs
H. A. J. Crauwels, D. Van Oudheusden
openaire   +1 more source

A review of short-term hydro scheduling tools

2013 48th International Universities' Power Engineering Conference (UPEC), 2013
This paper presents a review of short-term hydro scheduling tools reported by the scientific community, presenting different methodologies and models published over the last 20 years about operations, scheduling and optimization of hydro systems, in competitive electricity markets, considering the short-term horizon, i.e., between one day and one week,
G. J. Osorio, J. C. O. Matias, J. P. S. Catalao   +2 more
openaire   +1 more source

Short-term scheduling of thermal power systems

[Proceedings] Conference Papers 1991 Power Industry Computer Application Conference, 2002
An algorithm to solve short-term thermal scheduling problems using the Lagrangian relaxation approach is presented. For individual subproblems, dynamic programming without discretizing generation levels is proved to be an efficient approach. The ramp rate constraint is handled through relaxation.
X. Guan, P.B. Luh, H. Yan, J.A. Amalfi
openaire   +1 more source

A review for short-term scheduling of batch processes

2008 IEEE International Conference on Automation and Logistics, 2008
Significant progresses in the area of short-term scheduling of batch processes have been achieved in the pass two decades. The main objective of this paper is to present a review in this challenging area. Based on time representation, existing scheduling approaches are classified into discrete and continuous time formulation and their strengths and ...
null Junling Zheng, null Xiaohui Zhou, null Ting Ye   +2 more
openaire   +1 more source

Short-Term Scheduling

2009
In this chapter, the concept of the state sequence network (SSN) representation, which is the cornerstone of the material entailed in this textbook, is presented. This representation is based on states only, eliminating the use of tasks and units.
openaire   +1 more source

A short-term scheduling for the optimal operation of biorefineries

Energy Conversion and Management, 2011
Abstract This work presents an analysis of the inherent potentialities and characteristics of the sugarcane industries that produce sugar, bioethanol, biogas and bioelectricity and that are being described as “Biorefineries”. These Biorefineries are capable of producing bio-energy under diverse forms, intended for their own internal consumption and ...
E.F. Grisi, J.M. Yusta, H.M. Khodr
openaire   +1 more source

Short-term scheduling of diesel blending and distribution

IFAC Proceedings Volumes, 2013
Abstract The present work is concerned with the development of alternative optimization models which address the scheduling problem of diesel blending and distribution in oil-refinery operations. The problem involves intermediate products stored in dedicated tanks that are blended to produce diesel with three different grades.
Diovanina Dimas, Valéria V. Murata, Sérgio M.S. Neiro   +2 more
openaire   +1 more source

Realizability of Short-Term Power Generation Schedules

IFAC Proceedings Volumes, 1999
Abstract In the current operation practice of electric power companies, hourly generation schedules obtained in short-term generation scheduling problems are taken as hourly energy delivery schedules. However, it is shown in this paper that hourly generation levels satisfying ramp-rate constraints may not be able to be realized as an energy delivery ...
Xiaohong Guan, Feng Gao, Alva Svoboda
openaire   +1 more source

Studies on the Short Term Fairness Properties of Joint Scheduler

International Journal of Interdisciplinary Telecommunications and Networking, 2012
Since the utilization of multiuser diversity in wireless networks can increase the information theoretic capacity, much attention has been paid to packet schedulers exploiting multiuser diversity. However, it is known if there exists a tradeoff between the information theoretic capacity and fairness achieved by schedulers exploiting multiuser diversity.
openaire   +1 more source

Short‐term maintenance scheduling for utility systems

Journal of Quality in Maintenance Engineering, 2007
PurposeThe purpose of this study is to optimize short‐term maintenance scheduling of utility systems satisfying network constraints.Design/methodology/approachA mathematical programming model with network constraints is presented.FindingsThere are some cases in which the maintenance of a certain unit affects the operations of non‐maintenance units. The
Shinobu Matsuoka, Masaaki Muraki
openaire   +1 more source