Endüstri Mühendisliği Bölümü Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1942
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Browsing Endüstri Mühendisliği Bölümü Koleksiyonu by Type "Conference Object"
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Conference Object A Capacitated Lot Sizing Problem With Stochastic Setup Times(2015) Taş, Duygu; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF UniversityIn this paper, we study a Capacitated Lot Sizing Problem with Stochastic Setup Times (CLSP-SST).Conference Object A Mathematical Programming-Based Approach for an Energy Investment Planning of a Private Company(2017) Ağralı, Semra; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF University...Conference Object Capacity Allocation and Pricing Policies for Cloud Computing Service Providers(Curran Associates Inc., 2018) Ünlüyurt T.; Özgür Özlük; Afghah, R.; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF UniversityThe cloud computing is regarded as a paradigm shift in today’s IT world. As cloud computing resources behave like perishable products, revenue management techniques can be applied to increase cloud service provider's total revenue. In this paper, we propose various methods for pricing and capacity allocation. We consider three types of instances offered by the service provider; subscription, on-demand and spot instances. We introduce three allocation and pricing policies and propose different models. We simulate these models on a randomly generated dataset and evaluate the models for different capacities. The results we obtain indicate the sensitivity of revenue to varying policies and demonstrate the potential profit increase for cloud service providers. © 2018, Curran Associates Inc. All rights reserved.Conference Object Column Generation Based Algorithms for a Vrp With Time Windows & Variable Departure Times(2016) Michelini, S; Arda, Y; Küçükaydın, Hande; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF University...Conference Object Combining Acceleration Techniques for Pricing in a Vrp With Time Windows(2016) Michelini, S; Arda, Y; Küçükaydın, Hande; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF University...Conference Object Dialogue Enhancement Using Kernel Additive Modelling(Institute of Electrical and Electronics Engineers Inc., 2015) Liutkus, A.; Kırbız, Serap; Cemgil, A. Taylan; 02.05. Department of Electrical and Electronics Engineering; 02. Faculty of Engineering; 01. MEF UniversityIt is a major problem for the sound engineers to find the right balance between the dialogue signals and the ambient sources. This problem also makes one of the main causes of the audience concerns. The audience wants to arrange the sound balance based on their personal preferences, listening environment and their hearing. In this work, a method is proposed for enhancing the dialogue signals in stereo recordings that consist of more than one source. The kernel additive modelling that has been used successfully in sound source separation is used to extract the dialogues and the ambient sources from the movie sounds. The separated dialogue and ambient sources can later be upmixed by the user to make a personal mix. The separation performance of the proposed method is evaluated on the sounds generated by mixing the sources which were taken from the only dialogue and only music parts of the movies. It has been shown that the Kernel Additive Modelling (KAM) based method can be successfully used for dialogue enhancement. © 2015 IEEE.Conference Object Citation - Scopus: 27Fuzzy Capital Budgeting Using Fermatean Fuzzy Sets(Springer, 2021) Sergi, Duygu; Sarı, İrem Ucal; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF UniversityInvestment projects are mostly evaluated by capital budgeting techniques to measure their profitability. The parameters used in capital budgeting such as future cash flows, interest rate and useful life involves high uncertainty due to the lack of information for the future environment. Since the uncertainty involved in forecasting the parameters is mostly in high levels, fuzzy set theory could be used in the determination of capital budgeting parameters to handle uncertain information in the analyses. Fermatean fuzzy sets are one of the most recent extensions of fuzzy set theory which are capable to handle higher levels of uncertainties by assigning fuzzy parameters from a larger domain. In this paper, fuzzy capital budgeting techniques that are fuzzy net present worth, fuzzy net future worth and fuzzy net annual worth are extended using fermatean fuzzy sets. An illustration for the calculations is also presented.Conference Object Heuristic Methods for a Capacitated Lot-Sizing Problem With Stochastic Setup Times(2015) Taş, Duygu; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF University...Conference Object Citation - WoS: 4Citation - Scopus: 4Perceptual Coding-Based Informed Source Separation(2014) Girin, Laurent; Kırbız, Serap; Ozerov, Alexey; Liutkus, Antoine; 02.05. Department of Electrical and Electronics Engineering; 02. Faculty of Engineering; 01. MEF UniversityInformed Source Separation (ISS) techniques enable manipulation of the source signals that compose an audio mixture, based on a coder-decoder configuration. Provided the source signals are known at the encoder, a low-bitrate side-information is sent to the decoder and permits to achieve efficient source separation. Recent research has focused on a Coding-based ISS framework, which has an advantage to encode the desired audio objects, while exploiting their mixture in an information-theoretic framework. Here, we show how the perceptual quality of the separated sources can be improved by inserting perceptual source coding techniques in this framework, achieving a continuum of optimal bitrate-perceptual distortion trade-offs.Conference Object The Traveling Salesman Problem With Time-Dependent Service Times(2016) Taş, Duygu; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF UniversityThis paper introduces a version of the classical traveling salesman problem with time-dependent service times. In our setting, the duration required to provide service to any customer is not fixed but defined as a function of the time at which service starts at that location. The objective is to minimize the total route duration, which consists of the total travel time plus the total service time. The proposed model can handle several types of service time functions, e.g., linear and quadratic functions. We describe basic properties for certain classes of service time functions, followed by the computation of valid lower and upper bounds. We apply several classes of subtour elimination constraints and measure their effect on the performance of our model. Numerical results obtained by implementing different linear and quadratic service time functions on several test instances are presented.
