A 1600-MIPS Parallel Processor IC for Job-Shop Scheduling (2009)
Kuan-hung Chen, Student Member, Tzi-dar Chiueh, Senior Member, Shi-chung Chang, Peter B. Luh
Abstract—A job shop is a typical environment for manufacturing low-volume and high-variety discrete parts, where parts are of various due dates, priorities, and sequences of production operations....
Group Elevator Scheduling With Advance Information for Normal and Emergency Modes (2009)
Peter B. Luh, Bo Xiong, Shi-chung Chang
Abstract—Group elevator scheduling has long been recognized as an important problem for building transportation efficiency, since unsatisfactory elevator service is one of the major complaints of...
Optimization of Joint Replacement Policies for Multipart Systems by a Rollout Framework (2009)
Tao Sun, Student Member, Qianchuan Zhao, Peter B. Luh, Robert N. Tomastik, Senior Member
Abstract—Maintaining an asset with life-limited parts, e.g., a jet engine or an electric generator, may be costly. Certain costs, e.g., setup cost, can be shared if some parts of the asset are...
Feng Zhao, Student Member, Peter B. Luh, Joseph H. Yan, Senior Member, Gary A. Stern, ...
Abstract—Deregulated electricity markets in the U.S. currently use an auction mechanism that minimizes total supply bid costs to select bids and their levels. Payments are then settled based on...
An Optimization-Based Approach for Design Project Scheduling (2009)
Ming Ni, Peter B. Luh, Bryan Moser
Abstract—Concurrent engineering has been widely used in managing design projects to speed up the design process by concurrently performing multiple tasks. Since the progress of a design task often...
Peter B. Luh, William E. Blankson, Student Member, Ying Chen, Student Member, Joseph H. Yan, ...
Abstract—Deregulated electricity markets use an auction mechanism to select offers and their power levels for energy and ancillary services. A settlement mechanism is then used to determine the...
Power Portfolio Optimization in Deregulated Electricity Markets With Risk Management (2008)
Jun Xu, Peter B. Luh, Frederick B. White, Ernan Ni, Krishnan Kasiviswanathan
Abstract—In a deregulated electric power system, multiple markets of different time scales exist with various power supply instruments. A load serving entity (LSE) has multiple choices from these...
Lagrangian Relaxation Neural Network for Unit Commitment (2008)
Peter B. Luh, Yajun Wang, Xing Zhao
Abstract: This paper presents a novel method for unit commitment by synergistically combining Lagrangian relaxation for constraint handling with Hopfield-type recurrent neural networks for fast...
. This paper studies the scheduling of design projects with uncertain number of iterations while managing design risks. A "separable" problem formulation that balances modeling accuracy and...
Optimization Based Bidding Strategies in the Deregulated Market (2007)
Daoyuan Zhang, Yajun Wang, Peter B. Luh
. With the deregulation of electric power systems, market participants are facing an important task of bidding energy to an Independent System Operator (ISO). This paper presents a model and a method...
An Effective Method to Reduce Inventory in Job Shops (2007)
Peter B. Luh, Xiaohui Zhou, Robert N. Tomastik
Inventory plays a major role in deciding the overall manufacturing costs, and a good scheduling system should balance the on-time delivery of products versus low work-in-process (WIP) inventory. In...
Scheduling Job Shops with Batch Machines Using the Lagrangian Relaxation Technique (2007)
Scheduling is a key factor for manufacturing productivity. Effective scheduling can improve on-time delivery, reduce work-in-process inventory, cut lead time, and improve machine utilization....
Improving the Lagrangian Relaxation Approach for Large Job-shop Scheduling (2007)
Lei Fang, Peter B. Luh, Haoxun Chen
Abstract. Lagrangian Relaxation (LR) has recently emerged as a practical approach for job shop scheduling problems of realistic size. The efficiency of the approach, however, depends on how fast the...
A Lagrangian relaxation based approach to schedule asset overhaul and repair services (2005)
Peter B. Luh, Danqing Yu, Sada Soorapanth, Er I. Khibnik, Ravi Rajamani
Abstract—Overhaul and repair services are important segments of the remanufacturing industry, and are characterized by complicated disassembly, repair and assembly process plans, stochastic...
Improving market clearing price prediction by using a committee machine of neural networks (2004)
Jau-jia Guo, Student Member, Peter B. Luh
Abstract—Predicting market clearing prices is an important but difficult task, and neural networks have been widely used. A single neural network, however, may misrepresent part of the input-output...
Ernan Ni, Peter B. Luh, Stephen Rourke, Senior Member
Abstract—In the deregulated power industry, a generation company (GenCo) sells energy and ancillary services primarily through auctions in a daily market. Developing effective strategies to...
Thesis (M.S.)--University of Connecticut, 2003.
A new Lagrangian relaxation method to schedule asset overhaul and repair services / (2003)
Thesis (M.S.)--University of Connecticut, 2003.
Li Zhang, Peter B. Luh, Krishnan Kasiviswanathan
Abstract—The energy market clearing prices (MCPs) in deregulated power markets are volatile. Good MCP prediction and its confidence interval estimation will help utilities and independent power...
Jau-jia Guo, Student Member, Peter B. Luh
In a deregulated power market, bidding decisions rely on good market clearing price prediction. One of the common forecasting methods is Gaussian radial basis function (GRBF) networks that...
Price-Based Approach for Activity Coordination in a Supply Network (2003)
Peter B. Luh, Ming Ni, Haoxun Chen, L. S. Thakur
Pressed by market globalization and concomitant competition, more and more manufacturers are relying on their suppliers to provide raw materials and component parts so as to focus on their core...
Blankson, William Enin., Luh, Peter B.
Thesis (M.S.)--University of Connecticut, 2003.
An optimization-based approach for facility energy management with uncertainties (2002)
Jun Xu, Peter B. Luh, Phd William, E. Blankson, Ron Jerdonek, Khalil Shaikh
Effective energy management for facilities is becoming increasingly important in view of rising energy costs, the government mandate on reduction of energy consumption, and human comfort...
Multi-agent logistics management (2001)
Eugene Santos, Feng Zhang, Peter B. Luh
Compared to inter-organizational logistics management, the goal of intra-organizational logistics management is to maximize the outcome of the whole company rather than individual benets. While many...
A Macro-Level Scheduling Method Using Lagrangian Relaxation (2001)
Yuanhui Zhang, Peter B. Luh, Katsumi Narimatsu, Tetsuro Moriya, Tsuyoshi Shimada, Lei Fang
In this paper, a macro-level scheduling method is developed to provide high-level planning support for factories with multiple coordinating cells. The key challenges are large problem sizes,...
Mixed-Model Assembly Line Scheduling Using the Lagrangian Relaxation Technique (2000)
Yuanhui Zhang, Peter B. Luh, Kiyoshi Yoneda, Toshiyuki Kano, Yuji Kyoya
The increasing market demand for product variety forces manufacturers to design mixedmodel assembly lines on which different product models can be switched back and forth and mixed together with...
Lagrangian Relaxation Neural Networks for (2000)
Job Shop Scheduling, Peter B. Luh, Xing Zhao, Yajun Wang, Lakshman S. Thakur
Manufacturing scheduling is an important but difficult task. In order to effectively solve such combinatorial optimization problems, this paper presents a novel Lagrangian relaxation neural network...
An Effective Method to Reduce Inventory in Job Shops (2000)
Peter B. Luh, Xiaohui Zhou, Robert N. Tomastik
Inventory plays a major role in deciding the overall manufacturing costs, and a good scheduling system should balance the on-time delivery of products versus low work-in-process (WIP) inventory. In...
Abstract Discrete Optimization An alternative framework to Lagrangian relaxation (2000)
A new Lagrangian relaxation (LR) approach is developed for job shop scheduling problems. In the approach, operation precedence constraints rather than machine capacity constraints are relaxed. The...
Optimization Based Bidding Strategies in the Deregulated Market (2000)
Daoyuan Zhang, Yajun Wang, Peter B. Luh
With the deregulation of electric power systems, market participants are facing an important task of bidding energy to an Independent System Operator (ISO). This paper presents a model and a method...
An Effective Approach for Job-Shop Scheduling with Uncertain Processing Requirements (1999)
Peter B. Luh, Dong Chen, Lakshman S. Thakur
Production systems often involve various uncertainties such as unpredictable customer orders or inaccurate estimate of processing times. Managing such uncertainties is becoming critical in the era of...
Bin Jin, Peter B. Luh, L.S. Thakur
Effective scheduling of production lots is of great importance for manufacturing medium to high-volume products that require significant setup times. Compared to traditional entire-lot production,...
Copyright C ○ “IIE” ISSN: 0740-817X print (1999)
Dong Chen, Peter B. Luh, Lakshman S. Thakur, Jack Moreno
Optimization-based manufacturing scheduling with multiple resources, setup requirements, and transfer lots
An Effective Approach for Job-Shop Scheduling with Uncertain Processing Requirements (1999)
Peter B. Luh, Dong Chen, Student Member, Lakshman S. Thakur
Production systems often involve various uncertainties such as unpredictable customer orders or inaccurate estimate of processing times. Managing such uncertainties is becoming critical in the era of...
BM/C(3) Algorithm Mapping Onto Concurrent Processors. (1998)
Pattipati, Krishna R., Luh, Peter B., Lee, Rong-Tay, Shah, Samir, Deb, Somanth
This report is concerned with the mapping of large scale resource allocation algorithms onto parallel computing architectures. The mapping problem is viewed as one of assigning the nodes of a finite,...
Holonic Manufacturing Scheduling: Architecture, Cooperation Mechanism, and Implementation (1998)
Ling Gou, Peter B. Luh, Yuji Kyoya
A Holonic Manufacturing System #HMS# is a manufacturing system where key elements, such as machines, cells, factories, parts, products, operators, teams, etc., are modeled as #holons" having...
Lagrangian Relaxation Neural Networks for Job Shop Scheduling (1998)
Peter B. Luh, Xing Zhao, Yajun Wang, Lakshman S. Thakur
Manufacturing scheduling is an important but difficult task. In order to effectively solve such combinatorial optimization problems, this paper presents a novel Lagrangian Relaxation Neural Network...
Scheduling of Design Projects with Uncertain Number of Iterations (1998)
Peter B. Luh, Feng Liu, Bryan Moser
A short product design cycle is critical to the success of companies in the era of timebased competition. The underlying design activities, however, are often interlinked and quite uncertain. For...
Lagrangian Relaxation Neural Networks for Job Shop Scheduling (1998)
Peter B. Luh, Xing Zhao, Yajun Wang, Lakshman S. Thakur
. Manufacturing scheduling is an important but difficult task. Building on our previous success in developing optimization-based scheduling methods using Lagrangian relaxation for practical...
Electric utilities face many uncertainties in their daily scheduling and inter-utility transaction operations. The effects of these uncertainties can propagate through the time horizon, significantly...
Xiaohong Guan, Peter B. Luh, Renhou Li
. An optimization-based algorithm is presented for the short-term scheduling of hydrothermal power systems using the Lagrangian relaxation technique. This paper concentrates on the solution...
An optimization-based algorithm for job shop scheduling (1997)
Jihua Wang, Peter B. Luh, Xing Zhao, Jinlin Wang
Scheduling is a key factor for manufacturing productivity. E#ective scheduling can improve on-time delivery, reduce inventory, cut lead times, and improve the utilization of bottleneck resources....
Optimization-Based Sale Transactions And Hydrothermal Scheduling (1995)
Balakumar Prasannan, Peter B. Luh, Houzhong Yan, James A. Palmberg, Lan Zhang
Selling and purchasing power are important activities for utilities because of potential savings. When a selling utility presents an offer including prices, power levels and durations, a purchasing...
Optimization-Based Inter-Utility Power Purchases (1994)
Lan Zhang, Peter B. Luh, Xiaohong Guan, George Merchel
Power transactions are important activities among electric utility companies. Effective transaction decisions can result in significant savings since marginal generation costs of neighboring...
Holonic Planning and Scheduling for a Robotic Assembly Testbed (1994)
Ling Gou, Tetsuo Hasegawa, Peter B. Luh, Shinsuke Tamura, John M. Oblak
A Holonic Manufacturing System (HMS) is a manufacturing system where key elements, such as machines, products, parts, etc., have autonomous and cooperative properties. These elements are called...
Scheduling Of Manufacturing Systems Using The Lagrangian Relaxation Technique (1993)
Peter B. Luh, Debra J. Hoitomt
Scheduling is one of the most basic but the most difficult problems encountered in the manufacturing industry. Generally, some degree of time-consuming and impractical enumeration is required to...
Optimization-Based Bidding Strategies for Deregulated Electric Power Markets (1970)
Xiaohong Guan, Ernan Ni, Peter B. Luh, Yu-Chi Ho
Deregulation of the electric power industry worldwide raises many challenging issues. Aiming at these challenging issues and using California and New England power markets as background, this chapter...
A Bundle Method for Hydrothermal Scheduling
Daoyuan Zhang, Peter B. Luh, Yuanhui Zhang
Lagrangian relaxation has been widely used in hydrothermal scheduling. Complicating constraints are relaxed by multipliers which are usually updated by a subgradient method (SGM). The SGM suffers...