Sharif Digital Repository

Nanotechnology with the tools, materials and their applications in areas such as engineering mechanics, materials, electronics, computers, and machines at the nanoscale is dealing. The Fnarvy, atoms and molecules as building materials, engineering bricks counts. In mechanical engineering branch, two aspects are discussed in view of nanotechnology, nano-scale structures and analyzing the behavior of phenomena that occur at the nanoscale. In this project, methods to analyze the behavior of nanoscale materials has been studied.
The present thesis examines the natural frequencies of nano graphene sheets on elastic foundation deals. The elastic foundation modeled with two springs.At first The... 

In this paper, the elastic response of a surface-stiffened transversely isotropic half-space subjected to a surface normal load is addressed. The half-space is reinforced by a Kirchhoff thin plate bonded to its surface. Two different boundary conditions are considered across the plate-half-space interface: (i) the classic approach in which the plate in-plane deformation is neglected by writing the interfacial boundary conditions across the plate mid-plane, and (ii) the refined approach that considers the in-plane deformation of plate due to bending by writing the boundary conditions across the bottom face of plate. By virtue of appropriate displacement potentials, the complete set of elastic... 

There have been many works on generative networks and image generation in the past few years, but the problem with this work is that there is no control over the generated images. The goal of disentangled image synthesis is to generate new images with specific detail and have control over the generated images. Image-based virtual try-on aims to synthesize the customer image with an in-shop clothes image to acquire seamless and natural try-on results, which have attracted increasing attention. The main procedures of image-based virtual try-on usually consist of clothes image generation and try-on image synthesis. In contrast, prior arts cannot guarantee satisfying clothes results when facing... 

Image registration is the process of matching two or more images captured at different times, angles or even sensors. Image registration is finding a transformation between two images. Image registration has many applications in different fields of Image Processing and machine vision. In the field of remote sensing, image registration can be used for environmental monitoring, generating graphical maps and gathering data for geogeraphical information systems, also in the field of medical image processing it can be used to detect tumor growth. Generally whenever there is need to extract information from many images; image registration is considered as an important pre-processing step.... 

Image registration is defined as matching two or more than two images which are taken from a same scene in different times, from various views and using different sensors. By matching, we mean finding the transformation function between the images. Image registration
has many application in medical domains such as analyzing changes in body limbs, supervision of the tumors growth, and robotic surgery. The challenges of image registration are unavailability of the transformation function, existence of the outliers in the images, changes in the images intensity, changes in the image geometry, noise, etc. Image registration consists of four steps: (i) feature extraction, (ii) choosing a... 

In this study, effect of a single concentrated moving mass on thin linear and nonlinear rectangular plates is investigated. The present research focuses on the dynamic behavior of thin plates traversed by a moving mass. Although vast amount of literature is available regarding the modeling of plates with geometric and material nonlinearity as well as evaluation of the inertial components of the external moving mass, but actually no one has addressed implementation of dynamic effects of moving mass for a nonlinear plate. Due to scientific significance of inertial effects in most cases, the external dynamic loading is considered as a moving mass. However, moving force loading is also taken... 

In this research a new type of external post-tensioned concrete slab is proposed. In this system, the tension force of cables is used as upward force acting at the bottom face of slab. To achieve this behavior, two short concrete columns mounted at the bottom face of slab and act as the middle supports for the cables. Based on the cable force and its angle, an upward force is applied to the slab at the location of columns. In fact, a truss structure comprising of the concrete slab as compression cords, cables as tension cords, and columns as ties. By virtue of Kirchhoff’s plate theory, an analytical treatment of the slab under gravity loads is addressed. For analytical study, it is assumed...