Iran University of Science and Technology

About: Iran University of Science and Technology is a education organization based out in Tehran, Iran. It is known for research contribution in the topics: Nonlinear system & Finite element method. The organization has 12917 authors who have published 24965 publications receiving 372013 citations. The organization is also known as: Governmental Technical Institute & Advanced Art College.

Dynamic supply chain network design for the supply of blood in disasters: A robust model with real world application

Abstract: This paper presents a robust network design model for the supply of blood during and after disasters. A practical optimization model is developed that can assist in blood facility location and allocation decisions for multiple post-disaster periods. The application of the proposed model is investigated in a case problem where real data is utilized to design a network for emergency supply of blood during potential disasters. Our analysis on the tradeoff between solution robustness and model robustness arrives at important practical insights. The performance of the proposed ‘robust optimization’ approach is also compared with that of an ‘expected value’ approach.

The effect of iron and manganese on the formation of intermetallic compounds in aluminum–silicon alloys

Abstract: The effect of iron and manganese concentration on the morphology of complex intermetallics has been studied in an Al–12.7 wt.% Si alloy containing 0.1 wt.% Cr with three levels of iron (0.4, 0.8, 1.2 wt.%), and five different levels of manganese ranging from 0.0 to 0.5 wt.%. The intermetallic compounds form at high iron contents or at high concentrations of manganese and chromium with low iron. Star-like intermetallics form when the segregation factor is greater than 1.30. Chromium (0.1 wt.%) with more than 0.2 wt.% manganese are needed to convert all platelet phases to small star-like intermetallics. A power equation describes the relation between sludge formation temperature and iron content. The volume percentage of intermetallic compounds increases as the iron or manganese content increases. The amount of intermetallic can be estimated from a linear segregation factor.

A historical overview of the activation and porosity of metal–organic frameworks

Abstract: Since the first reports of metal–organic frameworks (MOFs), this unique class of crystalline, porous materials has garnered increasing attention in a wide variety of applications such as gas storage and separation, catalysis, enzyme immobilization, drug delivery, water capture, and sensing. A fundamental feature of MOFs is their porosity which provides space on the micro- and meso-scale for confining and exposing their functionalities. Therefore, designing MOFs with high porosity and developing suitable activation methods for preserving and accessing their pore space have been a common theme in MOF research. Reticular chemistry allows for the facile design of MOFs from highly tunable metal nodes and organic linkers in order to realize different pore structures, topologies, and functionalities. With the hope of shedding light on future research endeavors in MOF porosity, it is worthwhile to examine the development of MOFs, with an emphasis on their porosity and how to properly access their pore space. In this review, we will provide an overview of the historic evolution of porosity and activation of MOFs, followed by a synopsis of the strategies to design and preserve permanent porosity in MOFs.

Power Quality Issues in Railway Electrification: A Comprehensive Perspective

Abstract: Since the beginning of railway electrification, power quality has been a main problem in railway networks because of their special characteristics. Many ways of power quality improvement have been investigated and applied to ac and dc traction systems through railway electrification history. This paper presents a perspective on power quality issues through railway electrification development and investigates the necessity of power quality and system requirements for appropriate power quality. Compensation strategies are classified and compared. This aims to provide a comprehensive perspective of the power quality issue in railway power/distribution networks for researchers and engineers working on railway electrification. Less than 100 research articles are referenced for researchers to obtain good background information.