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A heuristic approach to minimizing the waiting time of jobs in two stage flow shop scheduling

100%
GOYAL B., KAUR S., GUPTA D.
Operations Research and Decisions
|
2024
|
vol. 34
|
issue 1
175-191
EN
The paper presents the influence of the waiting time of jobs in a 2 machine k- job Flow Shop Scheduling (FSS) problem. The main intention of the study is to find a sequence of jobs that delivers the least sum of the time of waiting for jobs. A heuristic approach has been adopted to achieve the desired objective. The experiments are conducted for more than 2000 problems of various sizes for the problems with special structures and problems with random times of processing. The weighted mean absolute error (WMAE) for the average of the sum of the waiting times of jobs is computed for both kind of problems after comparing with the optimal solutions. WMAE has been obtained less than 0.0075 for problems with special structures and less than 0.087 for problems with random times of processing. The WMAE is also reducing significantly with the increase in job size. The results demonstrate that the presented step-by-step procedure of the heuristic delivers significantly close to optimal solutions
2

Unterschiedliche kognitive Verarbeitungseffekte bei unterschiedlichen Textsorten

58%
Giessen H. W.
Germanica Wratislaviensia
|
2017
|
vol. 142
185-193
DE
Ziel der Studie ist, Indikatoren dafür zu finden, dass unterschiedliche Textsorten kognitiv unterschied­lich verarbeitet werden. Zu diesem Zweck wurde Probanden ein Gedicht in jeweils einzelnen Verszei­len vorgegeben – einmal mit der Vorgabe, dass nun ein Gedicht zu lesen sei; die zweite Gruppe erhielt die Information, es handele sich um einen Prosatext. Die Verarbeitungsdauer war offensichtlich von dieser Vorinformation determiniert.
EN
The study aims to research the cognitive processing of text types. Test persons were given poem verse lines – with the prescription that a poem was to be read, or a prose text, respectively. The processing time was determined by this preliminary information. Obviously this is an indicator that poems and prose are differently processed.
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