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sherizadeh--saied
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Production and Purification of Recombinant Amylin Peptide and Investigating the Effects of Synthetic and Natural Products on Amyloid Fibril Formation
, M.Sc. Thesis Sharif University of Technology ; KAalhor, Hamid Reza (Supervisor) ; Matloubi Moghaddam, Firouz (Co-Advisor)
Abstract
What determines the function of a protein, after its synthesis by the ribosome, is its unique three dimensional structure. The unique structure of protein is achieved through process of folding which is detrimental to protein function. Although this unique structure is stable in a variety of situations, the protein may undergo conformational change, due to slight changes in physiological conditions, affecting the protein structure and function. In certain conditions, the conformational change brings about misfolding of the protein leading to protein aggregation. The protein aggregation can also result in amyloid formation in which a soluble protein is converted to fibrils with specific...
Rescheduling of power systems constrained with transient stability limits in restructured power systems
, Article Electric Power Systems Research ; Volume 81, Issue 1 , 2011 , Pages 1-9 ; 03787796 (ISSN) ; Ehsan, M ; Feuillet, R ; Hadj-Saied, N ; Sharif University of Technology
2011
Abstract
This paper investigates various approaches to relieve the transient stability constraint in restructured power systems. The approaches adopted fall into two broad categories: those based on eliminating the constraint in the least-cost way and those based on eliminating with the least possible rescheduling. The latter group can, on the other hand, emerge in the form of a pool-protected policy in which the bilateral contracts are rescheduled to maintain the stability or in the form of a contract-protected policy in which the realizable bilateral contracts are maximized while minimizing the rescheduling in pool market. Transient energy function (TEF) method is used as a tool to calculate the...
Allocating the cost of transient stability constraint relief in bilateral electricity markets
, Article IET Generation, Transmission and Distribution ; Volume 5, Issue 11 , 2011 , Pages 1124-1131 ; 17518687 (ISSN) ; Feuillet, R ; Ehsan, M ; Hadj-Saied, N ; Sharif University of Technology
2011
Abstract
In this study, the issue of allocating the cost of transient stability relief in a bilateral electricity market is investigated. The results of a constrained generation scheduling problem can be utilised in two ways to price the cost of a constraint. In the first method, which is the basis of nodal pricing, the Lagrange multipliers of the nodal power balance constraint are used as the price of electricity at various buses. In the second method, which is used in this study, the constraint relief scheme is based on a bid-based adjustment market of increments and decrements offered by generators to be involved in the constraint relief process. In the scheme used in this study, the cost of...
Pressure Response Analysis of Naturally Fractured Condensate Reservoirs Regarding the Effect of Permeability Anisotropy
, M.Sc. Thesis Sharif University of Technology ; Jamshidi, Saied (Supervisor) ; Masihi, Mohsen (Co-Advisor)
Abstract
Producing from Gas Condensate Reservoirs under dew point pressure and at constant temperature may have a complex behavior because of existing two phase system and liquid around the well. Zones with different mobility generate as a zone away from the well containing only gas, a zone having liquid around the well and finally a zone with capillary effect. Existence of condensate around well reduces gas relative permeability and as a result productivity index of well decreases. In fact these condensate acts like an additional skin and because of some complex processes, investigating of these behaviors can be difficult.
Well testing analysis in Natural Fractured reservoir is generally based...
Well testing analysis in Natural Fractured reservoir is generally based...
Development of a New Simulation Tool to Study the Asphaltene Precipitation and Deposition in Oil Well Column Based on Particle Scaling
, M.Sc. Thesis Sharif University of Technology ; Jamshidi, Saied (Supervisor) ; Taghikhani, Vahid (Supervisor)
Abstract
Formation, precipitation and deposition of heavy organic compounds of petroleum fluids including, but not limited to, asphaltene in oil reservoirs and production systems have been by far the most important and challenging flow assurance problems. Therefore, preventative actions to control organic deposits in oil formations and production systems which can lead inevitably to reduction or cessation in production, have always been a main challenge for oil producers.In this thesis, a one dimensional simulator have been developed to study asphaltene precipitation, aggregation and deposition in an oil well column at isothermal and non-isothermal conditions. While the previously proposed PC-SAFT...
Implementation of SPECAN Algorithm in the Synthetic Aperture Radars (SAR)
, M.Sc. Thesis Sharif University of Technology ; Vosughi Vahdat, Bijan (Supervisor) ; Nayebi, Mohammad Mehdi (Co-Advisor)
Abstract
Environmental review, surveying land resources and the military mission requires high resolution imaging of large areas. in many cases, imaging should be performed during the night or in poor weather. Synthetic Aperture Radars (SAR)using long range propagation characteristics of radar signals and the complex information processing capability of modern digital electronics to provide high resolution image. The radar complements photographic and optical imaging capabilities because of them does not the time constraints, work and the weather. one of the most important methods for the extraction of synthetic aperture radar images by the method of imaging is the SPECAN algorithm. an important...