On The Interaction Between Location-Allocation of Population-Employment and Transportation Based on Living Costs

, M.Sc. Thesis Sharif University of Technology Ghasri, Milad (Author) ; Poorzahedy, Hossein (Supervisor)

Abstract

This study is an endeavor to model the interaction between transportation and land use, as a constituent of a joint land use-network design problem defined in the context of transit oriented development (TOD). Population and employment follow a Garin-Lowry model; the endogenously determined transportation demand is administered by a joint mode choice-assignment model; and mode choice is governed by a logit model. Equilibrium of population choice of place of residence, employment choice of place of retailing, and passenger choice of mode and path, are all governed by a maximum utility principle. An algorithm is devised to reach these equilibrium states by an evolutionary process, whose engine...

Active Noise Cancellation Using System Identification and Control Based on Neural Network

, M.Sc. Thesis Sharif University of Technology Ghasri, Homa (Author) ; Haj Sadeghi, Khosro (Supervisor)

Abstract

This thesis presents a new approach to feedback active noise cancellation. The problem of Reducing the noise level in the environment has been the focus of research over the years. Active Noise Cancellation (ANC) is one such approach that has been proposed to eliminate Noise. ANC refers to an electro acoustic approach of canceling acoustic disturbance to Produce a quieter environment. The basic principle of ANC is to introduce a canceling “anti Noise” signal that has the same amplitude but the exact opposite phase, thus resulting in Reducing the remainder noise signal. We use neural networks based on system identification And predict control to cancel acoustic noise. Canceling acoustic...

A new dynamic optimal m2m rf interface setting in relay selection algorithm (dorsa) for iot applications

, Article IEEE Access ; Volume 10 , 2022 , Pages 5327-5342 ; 21693536 (ISSN) Ghasri, M. A. G ; Hemmatyar, A. M. A ; Sharif University of Technology

Institute of Electrical and Electronics Engineers Inc 2022

Abstract

Machine-to-Machine (M2M) communication is an important type of communication in the Internet-of-Things (IoT). How to send data in these high-density communications using relay selection can help improve the performance of this type of communication in various applications. In addition, the possibility of simultaneous use of different Radio Frequency (RF) interfaces helps to use the spectrum more efficiently. In this work, we try to further use machine communication RF equipment and improve the average data rate of networks in some applications such as the IoT, which have their own bandwidth requirements. Therefore, we provide an optimization algorithm for relay selection as well as the...

Enhancement of the MAC Layer of Mobile Broadband Wireless Access Network

, M.Sc. Thesis Sharif University of Technology Gholi Ghasri, Monireh Allah (Author) ; Ajorloo, Hossein (Supervisor)

Abstract

Mobile Broadband Wireless Access technologies provide mobile users with broadband services, for example music downloading, online games and etc. IEEE 802.20 standard is one of the Mobile Broadband Wireless Access technologies , which has been published to support mobile users with high vehicular speed up to 250(km/h). The issue studied in this research is enhancement of MAC layer in IEEE 802.20 standard.
By having this intention in mind we firstly developed a simulator for IEEE 802.20 MAC layer implementation , then we tried implementing 3 different approaches for connecting mobile users to a new network in order to analyze their performance. Then we provided a method for decreasing...

Does the short-term boost of renewable energies guarantee their stable long-term growth? Assessment of the dynamics of feed-in tariff policy

, Article Renewable Energy ; Volume 159 , October , 2020 , Pages 1252-1268 Milad Mousavian, H ; Hamed Shakouri, G ; Mashayekhi, A. N ; Kazemi, A ; Sharif University of Technology

Elsevier Ltd 2020

Abstract

Feed-in tariff (FiT) is one of the most efficient ways that many governments throughout the world use to stimulate investment in renewable energies (REs) technology. For governments, financial management of the policy could be challenging as it needs a considerable amount of budget to support RE producers during the long remuneration period. In this paper, it has been illuminated that the early growth of REs capacity could be a temporary boost. And the socio-economic structure of the system will backlash the policy if some social mechanisms are not considered. Social tolerance for paying REs tax and potential investors’ trust emanated from budget-related mechanisms -which have rarely been...

Relay Selection for Machine-to-Machine Communication with the Same Source Requests in Heterogeneous Wireless Networks

, Ph.D. Dissertation Sharif University of Technology Allah Gholi Ghasri, Monireh (Author) ; Hemmatyar, Ali Mohammad Afshin (Supervisor) ; Bayat, Siavash (Co-Supervisor)

Abstract

Machine-to-machine communication (M2M) can be considered as one of the most important types of high-density communication in the Internet of Things (IoT). Therefore, how to send data using the cooperation of machines with each other and selecting the appropriate relay can play an effective role in improving the quality of network communication, especially when communication between sources and their destinations is weak. Since in the real world some of the applications used on a set of IoT machines require the similar bandwidth, we also followed this assumption. For this purpose, we went through three steps in this thesis. First, two new relay selection algorithms with static RF interface...