Abstract: This paper considers a bi-criteria scheduling on parallel machines in fuzzy environment which optimizes the weighted flow time and maximum tardiness. The fuzziness, vagueness or uncertainty in processing time of jobs is represented by triangular fuzzy membership function. The bi-criteria problem with weighted flow time and maximum tardiness as primary and secondary criteria, respectiv...

In the stochastic online scheduling environment, jobs with unknown release times and weights arrive over time. Upon arrival, the information on the weight of the job is revealed but the processing requirement remains unknown until the job is finished. With the objective of minimizing the total weighted completion time, various asymptotically optimal algorithms have been proposed for the online ...

This paper investigates the problem of just-in-time permutation flow shop scheduling with limited buffers and linear job deterioration in an uncertain environment. The fuzzy set theory is applied to describe this situation. A novel mixed-integer nonlinear program is presented to minimize the weighted sum of fuzzy earliness and tardiness penalties. Due to the computational complexities, the prop...

This paper presents a new mathematical model for a hybrid flow shop scheduling problem with multiprocessor tasks in which sequence dependent set up times and preemption are considered. The objective is to minimize the weighted sum of makespan and maximum tardiness. Three meta-heuristic methods based on genetic algorithm (GA), imperialist competitive algorithm (ICA) and a hybrid approach of GA a...

nowadays, the environmental impact of transportation project and, especially air pollution impacts, are major concerns in evaluating transportation projects. based on this concern, beside definition of traditional objective functions like total travel time and total investment cost, different type of environmental related function is considered as objective function in urban network design. in...

In the era of high frequency trading and pervasiveness irregularly spaced trading, we control for time element in Modified Weighted Price Contribution (MWPC) model by Jahanshahloo Spokeviciute (2018). We empirically show that our new modification controls reaction (Speed) market participants to arrival information.

Introduction Flow weighted gradient echo MRI techniques can be used for angiography. Furthermore, these techniques allow to visualise the ventilation of aquatic animals (1). Therefore using MRI, it should be possible to observe ventilation and blood flow in marine animals at the same time. Biochemical investigations led to the hypothesis that thermal tolerance is limited by insufficient oxygen ...

Reverse time migration (RTM) is based on the two-way wave equation, so its imaging results obtained by conventional zero-lag cross-correlation conditions contain a lot of low-wavenumber noises. So far, wavefield decomposition method Poynting vector has been developed to suppress these noises; however, this also some problems, such as unstable calculation vector, low accuracy decomposition, and ...