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Provide and Implement of Labor and Machinery Performance Measuring Patterns in Large Scale Concrete Building Projects
, M.Sc. Thesis Sharif University of Technology ; Mortaheb, Mohammad Mehdi (Supervisor)
Abstract
According to the principles of the country 20-year outlook charter Iran as a developing nation should be ranked first in economic, scientific and technological status in the region. Productivity improvement in all fields is one of the key essentials for realization of stable economic growth. Construction industry in developing countries contributes a major share of gross domestic product (GDP). It has a crucial bearing on economic growth, therefore enhancement of performance indicators in this industry will result in economic development of the country. This research project has offered a pattern for measuring and analyzing labor and machinery productivity in large scale construction. This...
Interference Reduction and Cancellation by Beamforming in Cognitive Radios
, M.Sc. Thesis Sharif University of Technology ; Nasiri Kenari, Masoumeh (Supervisor)
Abstract
Cognitive Radio (CR), as a new concept to efficiently utilize a licensed spectrum, and this has received intensive attension in recent years. By applying the cognitive technique, an unlicensed user (the secondary user (SU)) is allowed to transmit at the Primary User’s (PU) spectrum band under some conditions. Different approaches have been introduced to be utilized by the SU in order to be able to efficiently transmit at the PR’s spectrum without any sustainsial destructive effects on PR transmission and reception, which one of them is using multiple antenna in the cognitive transmitter. Hereby, CR is able to increase its throughput without substansial harmfull effect on PR’ transmission by...