scholarly journals Smart Material Planning Optimization Problem Analysis

2019 ◽  
Author(s):  
Rich C. Lee ◽  
Man-ser Jan
Keyword(s):  
Optimization Problem ◽  
Smart Material ◽  
Problem Analysis ◽  
Planning Optimization

Production Planning Optimization in F Company: A Scheduling Theory Case Study

2013 ◽  
Vol 655-657 ◽  
pp. 1646-1649 ◽  
Author(s):  
Chi Zhang ◽  
Zhen He ◽  
Yuan Peng Ruan
Keyword(s):  
Linear Programming ◽  
Production Planning ◽  
Optimization Problem ◽  
Assembly Line ◽  
Scheduling Theory ◽  
Scheduling Model ◽  
Planning Optimization ◽  
Optimization Methodology ◽  
Optimum Production

Scheduling is an effective optimization methodology which has been widely used for production planning. This paper presents a scheduling model to optimize the output of an assembly line in F Semiconductor Company in Tianjin, China. The authors formulate the optimization problem as linear programming. The model and its implementation are described in detail in this article. The optimum production allocations have been founded by the scheduling model and the output has been increased.

scholarly journals Route planning optimization problem at a logistics company

2015 ◽  
Vol 2 (2) ◽  
pp. 86-92
Author(s):  
Kinga Lepsényi ◽  
Mónika Pónusz
Keyword(s):  
Optimization Problem ◽  
Route Planning ◽  
Planning Optimization ◽  
Logistics Company

CFD Optimization of Liquid Annular Seals for Leakage and Rotordynamics Improvement

2009 ◽  
Author(s):  
Alexander O. Pugachev
Keyword(s):  
High Speed ◽  
Optimization Problem ◽  
Operating Conditions ◽  
Problem Analysis ◽  
Cfd Model ◽  
Rotordynamic Coefficients ◽  
Design Variables ◽  
Ansys Cfx ◽  
Gradient Based ◽  
Annular Seals

The study deals with optimization of leakage and rotordynamic characteristics of liquid annular seals. A nonlinear constrained multi-objective optimization problem is considered. An objective function is a weighted sum of leakage and whirl-frequency ratio of the seal. Side constraints are imposed on design variables. The seal consists of two rings which shape can be either cylinder or converging taper or diverging taper. There are four design variables — seal length and diameters of the rings. A non-gradient-based method is used for solving the optimization problem. Analysis of the seal performance is based on computational fluid dynamics (CFD). A full 3D eccentric CFD model of the seal including upstream and downstream regions is constructed in ANSYS CFX. The solution procedures for prediction of rotordynamic coefficients are discussed and compared. The whirling rotor method under the assumption of centered circular orbit is used in optimization runs. The CFD model of the seal is validated against experimental data taken from the literature. A mesh independence study is carried out. An optimization environment includes automatic grid generation, parallel CFD calculations of the seal, and optimization algorithm. Two optimization runs corresponding to low-speed and high-speed cases are performed. Seals with improved characteristics include near-cylindrical and divergent-tapered rings. Performance of three seals from the Pareto set is calculated for different rotational speeds and inlet pressures. Generally, the rotordynamic performance degrades at other operating conditions. Additional study for the seals with enlarged clearance is carried out to model effect of wear.

An Industry Maintenance Planning Optimization Problem Using CMA-VNS and Its Variations

2021 ◽  
pp. 429-443
Author(s):  
Anna Zholobova ◽  
Yefim Zholobov ◽  
Ivan Polyakov ◽  
Ovanes Petrosian ◽  
Tatyana Vlasova
Keyword(s):  
Optimization Problem ◽  
Maintenance Planning ◽  
Planning Optimization

scholarly journals Deterministic Conversion of Uncertain Manpower Planning Optimization Problem

2018 ◽  
Vol 26 (5) ◽  
pp. 2748-2757 ◽  
Author(s):  
Bo Li ◽  
Yuanguo Zhu ◽  
Yufei Sun ◽  
Grace Aw ◽  
Kok Lay Teo
Keyword(s):  
Optimization Problem ◽  
Manpower Planning ◽  
Planning Optimization
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