Sharif Digital Repository

In this thesis, a model of electrochemical treatment of tumor is simulated by numerical method. The orthogonal collocation method is used for numerical solution. The model is solved in two situations, one in the absence of chemical reaction (water hydrolysis) and the other when chemical reaction is occurring in the electrolyte. In transient mode, it is possible to solve the model in low level currents (about 20 A/m2) by few number of collocation points (about 15 points) and only in a single domain. However, by increasing current, it is necessary to use more points in domain especially in the first 10% of the domain (very close to the electrode) where the maximum rate of diffusion/migration... 

The purpose of this study is the implementation of multi-model predictive control (MMPC) approach for the co-polymerization system of methyl methacrylate - vinyl acetate. Simpler development of local models and controllers and also convenience of understanding the model and controller structure are the main reasons for using this approach. In the first step, RGA analysis has been used for pairing input and output variables. Then the performance of PI controller on the system has been investigated. For designing model predictive controller (MPC) the nonlinear model has been linearized at operational point and the controller has been designed in MPC toolbox of MATLAB software R2013a. In the... 

The dual-arm cam-lock robot is a reconfigurable and adaptive robotic arm. The novel design of this robot allows it to manipulate the objects either by cooperation of two completely independent arms, or with locking proper links in each other and featuring the advantages of a parallel manipulator. Depending on the position of the cam-locked links, the robot may lose a few degrees of freedom and gain a different dynamic condition from the view point of the consumed energy, stiffness, dexterity, and etc. So the best configuration of the robot can be selected to perform the desired task, considering all possible configurations of the robot. In this dissertation, formulation and implementation of... 

In this project, we have assessed the electrochemical treatment method. In this method, pH decrease of the place where a tumor is located engenders the necrosis of cancer cells and consequently they are destroyed. The process of pH decrease is caused by exerting voltage on electrods that are located near the tumor. The aims of optimizing this methods are to minimize the pH that results in the increase of cancer cell annihilation and to minimize the HClO and Cl2 products which are toxic and chage the healthy tissues to cancer cells. In this project, the model of electrochemical treatment method is explained, and then this model is simulated using the parametes which are provided in the... 

Using energy storage systems has been remarkably improved the energy systems efficiency and reliability indicators of the system and also reduced the operating costs of these systems. Thus using them in an energy system would count as an advantage. Lately, the procedure of implementation of these systems has been studied widely and various motives behind implementing them have been reviewed. For example, the effect of cost optimization in electrical vehicles on reliability indicators from the load management perspective can be addressed. Therefore this thesis has studied the effect of electrical and thermal storage systems on the reliability indicators of an energy hub and the effect of... 

nowadays, due to population growth, unconventional use of water resources and on the other hand, climate change, limited renewable water resources, reduction of groundwater cavities, the need for water for agricultural use and energy production are increasing. Due to the fact that each cubic meter of dirty water pollutes 40 to 60 cubic meters of clean water and the entry of polluted effluent into the receiving sources of environmental degradation leads to a lot of wastewater treatment, water consumption management and The development of wastewater treatment processes is also becoming increasingly important. At present, wastewater treatment plants face the challenges of high energy... 

The development of computers and their related software packages provided engineers with the ability to simulate complex chemical processes. These simulations were the stepping stone for in-depth knowledge of the processes and also a prerequisite for the chemical process optimizations. From then, realistic simulation and optimization were always a primary concern for chemical engineers. To address this concern, they go beyond the one-dimensional design approach toward the two-dimensional design-operation systems, and the design-control interaction of the chemical processes afterward. Moreover, optimizing chemical processes from the aspect of energy and water, separately, gained lots of...