Sharif Digital Repository

Suspension polymerization is an important industrial process. Product of this process is particulate polymers that have a widely use in human lives. An important property of suspension polymerization process is the particle size distribution (PSD), which affects the end-use properties of the products. Therefore, the evolution of PSD is a major concern in the design of a suspension polymerization process. In a suspension polymerization reactor the evaluation of particle size distribution is the result of the interaction of the mixing conditions and the kinetics of the polymerization reactions. Mathematical modeling of particle size distribution in suspension polymerization processes should... 

MIMO radar is a next generation radar which transmits arbitrary waveforms at each one of its apertures. It has been shown that design of waveforms for MIMO radars in order to synthesize a desired spatial beampattern, is mapped into a waveform correlation matrix (R) design in the narrowband case. Therefore, waveform design in MIMO radar for beamforming could be broken into two steps, namely correlation matrix design and waveform synthesis for achieving given R. As of now, given a desired beampattern or estimated location information of targets, calculating R has been modeled as an optimization problem like SDP. Also, in some special cases like rectangular beampattern, close form solutions for... 

Iran has one of the lowest rates of female participation in the labor market among countries. In 2015, for every 100 men over 10 years old, only 21 women’s labor force participation was confirmed. This paper attemps to determine factors which cause low participation rate of women, particularly married ones. For this purpose, using structural estimation method, a dynamic discrete choice model was built, and estimated with means of simulated method of moments (SSM). The results indicated that the most important factor for low participation rate of married woman is children cost. Elimination of this cost would increase participation rate of married women about 30 percantage points  

In this thesis, we simulate the competition between some investment strategies based on dividends with each other and with mean-variance strategy (Markowitz) in an evolutionary finance framework. We perform simulations by two different approaches. In the first one, we use real dividend data and, in the second one we use dividends that are generated according to a dividend factor model. The dividend factor model which relates the dividends to the macro-economic factors is estimated from data using principal component analysis. Our simulations show that in this competition, the evolutionary portfolio rule will eventually hold the total market wealth. According to this simple rule the portfolio... 

Economical strategy of developed countries imposes to improve energy efficiency and a rational renewable energies usage in the buildings. Ground source heat pumps are one of the most important tools in the way moving toward this goal. This study focuses on studying the effect of applying different refrigerants in the direct expansion ground source heat exchangers. In order to compare the performance of the ground source heat pumps using different refrigerants, a specific methodology is presented and implemented. First on this study, the thermal performance of a geothermal borehole filled with both CO2 and a zeotropic mixture of CO2 and R32 (20/80) is studied and the quality, temperature, and... 

One of the novel methods of stabilization of nuclear waste is the use of vitrification technology. In order to stabilize high level wastes (HLLW) in glass, it is required that the elements are in their oxide form. Therefore, it is necessary to evaporate the waste and turn it into a solid form so that the elements can be converted into oxide form in the calcination furnace. Hence, one of the challenges of stabilization is the optimization of evaporation and calcination conditions. In this research, the parameters affecting evaporation were first investigated. Using laboratory measurements of application: temperature (110 to 180 °C), presence of nitric acid (0.5 to 4 mol/L), ratio of zirconium...