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The fused pyrimidine rings have many biological applications such as antibacterial, antiviral, antitumor and anti-inflammation activity. Therefore, their synthesis has attracted many attentions. In this thesis, the synthesis of fused pyrazolopyrimidine rings through two component reaction catalyzed by iodine was investigated. In this reaction, iodine is used to active the imine bond. Low toxicity, availability, low cost and stability to air are some benefits of iodine as a Lewis acid leading to widespread application of I2 in many different organic transformation. Mild reaction conditions, high yields and lower reaction times are among the main advantage of these reactions.
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In the first part of this thesis provided an efficient and easy method for the synthesis of 3-alkylidin-2-oxindoles containing tetrahydropyrazine structure in the absence of catalysts under green conditions. The oxindole unit represents an important structural motif found in natural products and biologically relevant compounds. On the other hand, pyrazines are important and well-known compounds found in nature and many medicinal compounds. According to the aforementioned, it seems that the oxindole compounds containing the pyrazine rings exhibit high biological activity.In the second chapter of this thesis, an efficient study to synthesize thiopyrano [2,3-b] quinoline containing indole... 

In this research, inspired by the navigation system of insects, a method for extracting the navigation information required for an autonomous device is presented, with an information input section in the form of image processing using optical flow and an information processing section with an artificial brain structure. In this method, the information obtained from the optical flow is processed by the neural network structure and the navigation information needed to control and guide the autonomous device is obtained. There are several methods to estimate the optical flow between two frames, in this research, the DEQ-Flow optical flow estimation network, which is a method based on deep... 

The purpose of this paper is to estimate the stiffness and strength of damaged rectangular reinforced concrete shear walls after an earthquake using surface crack patterns. Assessing the damage severity of buildings after an earthquake is an important part of the emergency inspection operation of buildings. Expert inspectors tag buildings into two categories of safe or unsafe that are usually affected by subjective decisions, which may result in catastrophic events reported in previous earthquakes. In this research, an extensive database on the images of damaged rectangular reinforced concrete shear walls (RCSWs) is collected and used to develop predictive equations for updated stiffness and... 

Decision-making about make or buy is one of important and strategic decisions. Any wrong decisions in this regard can cause high costs to organizations. About this make or buy decision, there is rich literature and experts of different scientific fields such as economy, sociology, industrial engineering, and management, etc. study about it. According to importance of make or buy decisions in research organization and self- sufficiency Jihad as a supportive organ from IRIB in order to make needed products of this organization, the main purpose of this research is to provide and present a conceptual framework to help make or buy decisions for this organization. The research method in this...