Tailoring Microstructure of Porous Composite Architectures Fabricated via Electrospinning Followed by Solution Infiltration: New Designs for Adjustable Engineering Properties

, Ph.D. Dissertation Sharif University of Technology Soleimani, Foad (Author) ; Bagheri, Reza (Supervisor) ; Pellerin, Christian (Co-Supervisor)

Abstract

Developing and functionally optimizing single and multi-component porous structures has been the interesting subject of numerous academic as well as industrial researches till now. This reflects various capabilities presented by such architectures for a range of applications including sensors, electronic devices, water/oil separation, filtration, food packaging, and bioengineering. Design and manufacture of a multi-component architecture with controlled microstructure is beneficial for obtaining a multifunctional device which provides a balance of physical and mechanical properties, biocompatibility, and so on. A fast-developing method for preparation of porous structures based on...

On the Importance of Noncrystalline Phases in Semicrystalline Electrospun Nanofibers

, Article ACS Applied Polymer Materials ; Volume 3, Issue 12 , 2021 , Pages 6315-6325 ; 26376105 (ISSN) Soleimani, F ; Mazaheri, M ; Pellerin, C ; Bagheri, R ; Sharif University of Technology

American Chemical Society 2021

Abstract

Tailoring the properties of electrospun fibers requires a detailed understanding and control of their microstructure. We investigate the structure/property relationships in fabrics of randomly aligned fibers of polylactide, a prevalent biopolymer, either as-spun or after annealing and solvent-induced crystallization. In-depth characterization by field-emission scanning electron microscope (FESEM), wide-angle X-ray diffraction (WAXD), attenuated total reflection Fourier transform infrared (ATR-FTIR), and modulated temperature differential scanning calorimetry (MT-DSC) reveals that the as-spun fibers comprise crystalline and mesomorphic phases, as well as oriented but mobile amorphous chain...

Business ethics : a philosophical and behavioral approach

, Book Conrad, Christian A.

Springer International Publishing AG 2018

Advances in Tensor Analysis with Applications in Text Mining

, Ph.D. Dissertation Sharif University of Technology Sobhani, Elaheh (Author) ; Babaiezadeh, Masoud (Supervisor) ; Comon, Pierre (Co-Supervisor) ; Jutten, Christian (Co-Supervisor)

Abstract

Tensors or multi-way arrays are useful tools to identify unknown quantities thanks to the uniqueness of their decomposition. Tensor decompositions have been widely applied to obtain unknown components with physical meanings in many applications such as medical image and signal processing, hyperspectral images analysis, chemometrics, etc.In this thesis, we investigate the application of tensor decomposition for probability estimations, which are required for some targeted data/text mining tasks such as unsupervised clustering of data/documents. Besides criticizing the existing tensor decomposition algorithms for probability estimations, we propose to apply some proper constrained tensor...

Bilnd Source Separation in Nonlinear Mixtures

, Ph.D. Dissertation Sharif University of Technology Ehsandoust, Bahram (Author) ; Babaiezadeh, Massoud (Supervisor) ; Jutten, Christian (Co-Supervisor) ; Rivet, Bertrand (Co-Supervisor)

Abstract

Blind Source Separation (BSS) is a technique for estimating individual source components from their mixtures at multiple sensors, where the mixing model is unknown. Although it has been mathematically shown that for linear mixtures, under mild conditions, mutually independent sources can be reconstructed up to accepted ambiguities, there is not such theoretical basis for general nonlinear models. This is why there are relatively few resultsin the literature in this regard in the recent decades, which are focused on specific structured nonlinearities.In the present study, the problem is tackled using a novel approach utilizing temporal information of the signals. The original idea followed in...