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A model for the optimal design of the Hospital Drug Distribution Chain

A model for the optimal design of the Hospital Drug Distribu...

引用

IEEE Workshop on Health Care Management (WHCM)

作者： Nicola Costantino Mariagrazia Dotoli Marco Falagario Maria Pia Fanti Agostino Marcello Mangini Fabio Sciancalepore Walter Ukovich Dipartimento di Ingegneria Meccanica e Gestionale Politecnico di Bari Italy Dipartimento di Elettrotecnica ed Elettronica Politecnico di Bari Italy Dipartimento di Elettrotecnica Elettronica e Informatica Università di Trieste Italy

ISBN: (纸本)9781424449972;9781424449989

The paper addresses the optimal design of the last branch of the pharmaceutical supply chain, i.e., the hospital drug distribution chain (HDDC), starting from suppliers till the patients of a department. Considering a distributed healthcare system composed of different stages connected by medicine and information links labeled with suitable performance indices, a procedure employing digraph modeling and mixed integer linear programming is presented to select the (sub)optimal HDDC configuration. The optimization model is applied under structural constraints to a case study describing an Italian healthcare regional distribution chain. The problem solution provides different HDDC structures allowing the improvement of the healthcare supply chain flexibility and performance.

关键词： Hospitals Drugs Pharmaceuticals Medical services Supply chains mixed integer linear programming Logistics Costs Constraint optimization Supply chain management

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Low-complexity linear phase fir filters in cascade form

Low-complexity linear phase fir filters in cascade form

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Dong Shi Ya Jun Yu School of Electrical and Electronic Engineering Nanyang Technological University Singapore

The design of low complexity finite impulse response (FIR) filters in a single-stage direct form or transposed direct form has reached a certain limitation since various multiplierless techniques have been proposed and explored. In addition, further investigations have shown that, instead of minimizing the number of adders used to implement the filter, it makes more sense to reduce the adder depth (AD) of the multiplier block (MB) from a power consumption point of view. Therefore, filters in cascade form deserve more attention because of the possibility of achieving even lower AD within each subfilter. In this paper, an algorithm is proposed for the design of linear phase FIR filters in cascade form with discrete coefficients. The proposed algorithm designs the coefficients of the subfilters simultaneously in integer space and finds all the possible discrete valued solutions. We show by an example that it is possible to design a filter using even smaller effective wordlength (EWL) and lower AD, whereas the total number of adders used to implement the overall filter is also kept minimum.

关键词： Finite impulse response filter Adders Energy consumption Algorithm design and analysis Costs Circuits Pipeline processing mixed integer linear programming Design engineering Nonlinear filters

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A model for the strategic design of Distribution Networks

A model for the strategic design of Distribution Networks

引用

IEEE International Conference on Automation Science and Engineering (CASE)

作者： Nicola Costantino Mariagrazia Dotoli Marco Falagario Maria Pia Fanti Agostino Marcello Mangini Fabio Sciancalepore Walter Ukovich Department of Ingegneria Meccanica e Gestionale Politecnico di Bari Bari Italy Department of Elettrotecnica ed Elettronica Politecnico di Bari Bari Italy Department of Elettrotecnica ed Elettronica Politecnico di Bari Italy Department of Electronics Electrical Engineering and Computer Science University of Trieste Trieste Italy

The paper addresses the optimal design of the last branch of the supply chain, i.e., the Distribution Network (DN), starting from manufacturers till the retailers. Considering a distributed system composed of different stages connected by material links labeled with suitable performance indices, a procedure employing digraph modeling and mixed integer linear programming is presented to select the (sub)optimal DN configuration. The optimization model is applied under structural constraints to a case study describing the distribution chain of a large enterprise of southern Italy producing consumer goods. The problem solution provides different structures allowing the improvement of the DN flexibility and performance.

关键词： Transportation Optimization Production Raw materials mixed integer linear programming Complexity theory

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Optimizing the makespan of washing operations of medical devices in hospital sterilization services

Optimizing the makespan of washing operations of medical dev...

引用

IEEE Workshop on Health Care Management (WHCM)

作者： O. Ozturk M.-L. Espinouse M. Di Mascolo A. Gouin Laboratoire G-SCOP (Grenoble-Science pour la Conception lOptimisation et la Production) UMR 5272 CNRS Grenoble INP UJF Grenoble France GIPSA-lab (Laboratoire Grenoblois de lImage de la Parole du Signal et de lAutomatique) UMR 5216 CNRS Grenoble INP UJF Grenoble France

ISBN: (纸本)9781424449972;9781424449989

In this paper, we deal with the problem of minimizing the makespan of washing operations in hospitals sterilization services. After use in operating blocs, reusable medical devices (RMD) are sent to the sterilization service which is composed of various processes. In the washing step, different sets of RMD, used for different operations, may be washed together without exceeding washer capacity. An RMD set must be washed in one cycle and so, we are not allowed to split RMD sets. In this case, we consider a batch scheduling problem where RMD sets may have different sizes and different release dates for washing. Note that if all release dates are equal, the problem is reduced to a bin packing problem. We provide a mixed integer linear programming model which aims at minimizing the makespan of washing operations. We provide and also experiment some heuristics based on classical bin packing algorithms.

关键词： Hospitals Surges Surgery Indium phosphide mixed integer linear programming Costs Scheduling Production Signal processing Signal design

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Optimization Model for Remanufacturing Logistics Network with Fuzzy Parameters

Optimization Model for Remanufacturing Logistics Network wit...

引用

International Conference on Measuring Technology and Mechatronics Automation, ICMTMA

作者： Ling Zhang Zhengxiao Wang Xiaohong Pan Tianyang Dong Inst. of Manuf. Eng. Zhejiang Univ. Hangzhou China Coll. of Comput. Zhejiang Univ. of Technol. Hangzhou China

In this paper, a multi-product multi-echelon remanufacturing logistics network based on forward flows is designed. A fuzzy mixed integer linear programming (FMILP) model is developed accounting for the uncertainty of the quantities of returned products as fuzzy parameters. Regarding the quantity of the returned products as triangle fuzzy parameter, the proposed model is solved by converting fuzzy chance constraints to their respective crisp equivalents. An illustrative example is presented to demonstrate the effectiveness of the model.

关键词： Reverse logistics Uncertainty mixed integer linear programming Heuristic algorithms Stochastic processes Software algorithms Mechatronics Manufacturing automation Technology management Educational institutions

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Clock Skew Scheduling for Soft-Error-Tolerant Sequential Circuits 10

Clock Skew Scheduling for Soft-Error-Tolerant Sequential Cir...

引用

Design, Automation & Test in Europe Conference & Exhibition

作者： Kai-Chiang Wu Diana Marculescu Carnegie Mellon University

ISBN: (纸本)9783981080162

Soft errors have been a critical reliability concern in nano-scale integrated circuits, especially in sequential circuits where a latched error can be propagated for multiple clock cycles and affect more than one output, more than once. This paper presents an analytical methodology for enhancing the soft error tolerance of sequential circuits. By using clock skew scheduling, we propose to minimize the probability of unwanted transient pulses being latched and also prevent latched errors from propagating through sequential circuits repeatedly. The overall methodology is formulated as a piecewise linear programming problem whose optimal solution can be found by existing mixed integer linear programming solvers. Experiments reveal that 30-40% reduction in the soft error rate for a wide range of benchmarks can be achieved.

关键词： Clocks Sequential circuits integer linear programming Piecewise linear techniques Logic circuits Scheduling Computer errors mixed integer linear programming Error analysis Degradation

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DESIGN OF NARROW-BAND AND WIDE-BAND FREQUENCY-RESPONSE MASKING FILTERS USING SPARSE NON-PERIODIC SUB-FILTERS

DESIGN OF NARROW-BAND AND WIDE-BAND FREQUENCY-RESPONSE MASKI...

引用

European Signal Processing Conference

作者： Zaka Ullah Sheikh Oscar Gustafsson Department of Electrical Engineering Linkoping University

In this work a new technique for design of narrow-band and wide-band linear-phase finite-length impulse response (FIR) frequency-response masking based filters is introduced. The technique is based on a sparse FIR filter design method for both the model (bandedge shaping) filter as well as the masking filter using mixed integer linear programming optimization. The proposed technique shows promising results for realization of efficient low arithmetic complexity structures.

关键词： Finite impulse response filters Complexity theory Design methodology Passband linear programming mixed integer linear programming

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Transition-aware real-time task scheduling for reconfigurable embedded systems 10

Transition-aware real-time task scheduling for reconfigurabl...

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Design, Automation and Test in Europe Conference and Exhibition

作者： Hessam Kooti Elaheh Bozorgzadeh Shenghui Liao Lichun Bao Computer Sciences Department University of California Irvine USA

ISBN: (纸本)9783981080162

Due to increase in demand for reconfigurability in embedded systems, real-time task scheduling is challenged by non-negligible reconfiguration overheads. If such overheads are not considered, tasks may not be schedulable under given deadlines, and hence, affecting the quality of service. We introduce the problem of real-time periodic task scheduling under transition overhead on heterogeneous reconfigurable systems. We formulate the problem as a network flow problem and provide a mixed integer linear programming solution. We compare our proposed solution with optimal scheduling under maximum fixed transition overhead. We deployed our method on task scheduling for multiple communication protocols on reconfigurable FPGA-like systems. Results show that our proposed scheduling improves the task schedulability by 24.2% in comparison with non-preemptive EDF and by 17.5% in comparison with maximum-transition-overhead scheduling.

关键词： Real time systems Embedded system Optimal scheduling Processor scheduling Dynamic scheduling Hardware Multiaccess communication Embedded computing Quality of service mixed integer linear programming

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Resource Allocation for Maximizing Weighted Sum Min-Rate in Downlink Cellular OFDMA Systems

Resource Allocation for Maximizing Weighted Sum Min-Rate in ...

引用

IEEE International Conference on Communications (ICC)

作者： T. Wang L. Vandendorpe Communications and Remote Sensing Laboratory Université Catholique de Louvain Louvain-la-Neuve Belgium

This paper considers the downlink of a cellular orthogonal frequency division multi-access (OFDMA) system, in which multiple base stations (BS) are coordinated by a centralized resource allocation algorithm. We address the problem of maximizing the weighted sum min-rate (WSMR) subject to a total power constraint at each BS, in terms of jointly optimizing coordinated BSs' subcarrier and power allocation. In particular, this problem leads to a resource allocation that guarantees similar rates to users in each cell. An iterative algorithm is proposed to optimize subcarrier and power allocation alternatively, so that the WSMR keeps increasing until convergence. In each iteration, the subcarrier allocation is updated by solving a mixed integer linear programming problem for each cell, while the power allocation is updated by solving a successive set of convex optimization problems with an algorithm based on Karush-KuhnTucker conditions. The effectiveness of the algorithm is illustrated by numerical experiments.

关键词： Resource management Downlink Iterative algorithms Convergence Frequency conversion Base stations Constraint optimization mixed integer linear programming Interchannel interference Radiofrequency interference

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mixed integer linear programming Trajectory Generation for Autonomous Nap-of-the-Earth Flight in a Threat Environment

Mixed Integer Linear Programming Trajectory Generation for A...

引用

IEEE Conference on Aerospace

作者： C.S. Ma R.H. Miller Northrop Grumman Integrated Systems El Segundo CA USA

This paper extends a recently developed approach to the optimal path planning of an autonomous vehicle in an obstacle field to three dimensions with specific applications to terrestrial navigation, with obstacle, terrain, and threat avoidance. We present a scenario where this approach can be applied to a rotorcraft performing nap-of-the-Earth flight in challenging terrain with multiple known surface threats, in both urban and non-urban type settings. mixed-integer linear programming (MILP) is the underlying problem formulation, from which an optimal solution can be obtained through the use of a commercially available MILP solver such as CPLEX. The solution obtained would be optimal in terms of the cost function specified in terms of fuel, time, altitude and threat exposure, and other predefined criteria. A receding horizon implementation of this MILP algorithm makes it suitable for real-time or near real-time applications

关键词： mixed integer linear programming Path planning linear programming Remotely operated vehicles Mobile robots Trajectory Mathematical programming Mathematical model Paper technology Navigation

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