Ali Najmi

Bio: Ali Najmi is an academic researcher from University of New South Wales. The author has contributed to research in topics: Supply chain & Proton exchange membrane fuel cell. The author has an hindex of 10, co-authored 25 publications receiving 328 citations. Previous affiliations of Ali Najmi include Iran University of Science and Technology & University of Tehran.

Novel dynamic formulations for real-time ride-sharing systems

Abstract: This paper proposes new objective functions for the matching problem arising in ride-sharing systems based on trips’ spatial attributes. Novel dynamic matching policies are then proposed to solve the problem dynamically in a rolling horizon framework. Finally, we present a new clustering heuristic to tackle instances with a large number of participants efficiently. We find that the proposed models maximize the matching rate while maintaining distance-savings at an acceptable level, which is an appealing achievement for ride-sharing systems. Further, our solution method is capable of solving large-scale instances in real-time.

Reviewing the transport domain: an evolutionary bibliometrics and network analysis

Abstract: Tracing the trajectory of scientific fields has been recognized by informaticians, nonetheless, little effort has been dedicated to understanding the evolution of the fast-moving research field of transport, quantitatively and qualitatively. This paper identifies intellectual turning points and emerging trends in the area of transport. Using bibliometric methods, co-keyword networks, journal co-citation networks, highly cited categories, and country and institute networks are detected, visualized and discussed. To conduct this analysis, all publications (35,712) in 23 top journals in the field of transport are extracted from the Institute for Scientific Information (Web of Science). The output of this article could be a valuable source for academics and practitioners working in the field of transport planning and those who work in the areas having a strong relationship with transport issues including mathematicians, economics, operation research, management and geography.

A conceptual model for measuring supply chain's performance

Abstract: In this article, a conceptual model for measuring supply chain (SC) performance is proposed which can be used for most organisations with the same class at various industries. The model has been developed according to performance metrics interdependencies and some existing shortcomings in the available literature of performance models. Furthermore, it has tried to see the key features of a performance evaluation model. The methodology which is used for solving and integrating the model is a combination of the analytical hierarchy process (AHP) and Decision Making Trial and Evaluation Laboratory (DEMATEL) methods. The DEMATEL and AHP are used for understanding the relationship between comparison metrics and integration to provide a value for performance, respectively.

Macroscopic parking dynamics modeling and optimal real-time pricing considering cruising-for-parking

Abstract: Network traffic congestion is known to be partially caused by vehicles cruising for parking. In this paper, we quantify and assess the effect of cruising-for-parking by developing a macroscopic parking dynamics model for a parking-dense neighborhood with limited parking supply, where cruising-for-parking is explicitly considered in conjunction with the interactions between on- and off-street parking. The model is mainly built upon the system dynamics of different families of vehicles in the neighborhood, which is governed by mass conservation equations utilizing the concept of macroscopic or network fundamental diagram (MFD or NFD). To reduce parking congestion and improve the overall system performance, two real-time parking pricing strategies are developed and integrated with the parking model: (i) a feedback-based reactive pricing strategy driven by the parking occupancy; and (ii) a model-based predictive or proactive pricing strategy that explicitly aims to minimize the expected aggregate cruising delay. Extensive numerical experiments have been conducted to compare the performance of the two strategies applied to both on- and off-street parking. The results provide new insights into how a parking system shall be better managed, with key implications for policy making summarized.

Providing hierarchical approach for measuring supply chain performance using AHP and DEMATEL methodologies

Abstract: Article history: Received 15 April 2010 Received in revised form 15 May 2010 Accepted 16 May 2010 Available online 17 May 2010 Measuring the performance of a supply chain (SC) is normally of a function of various parameters. Such a problem often involves in a multiple criteria decision making (MCDM) problem where different criteria need to be defined and calculated, properly. During the past two decades, Analytical hierarchy procedure (AHP) and DEMATEL have been some of the most popular MCDM approaches for prioritizing various attributes. The study of this paper uses a new methodology which is a combination of AHP and DEMATEL to rank various parameters affecting the performance of the supply chain. The DEMATEL is used for understanding the relationship between comparison metrics and AHP is used for the integration to provide a value for the overall performance. © 2010 Growing Science Ltd. All rights reserved.

国际刊物《Scientometrics》文献计量研究

Abstract: 本文对国际科学计量学杂志《Ｓｃｉｅｎｔｏｍｅｔｒｉｃｓ》１９７９－１９９１年的研究论文内容、栏目、作者及国别和编委及国别作了计量分析，揭示出科学计量学研究的重点、活动的中心及发展趋势，说明了学科带头人在发展科学计量学这门新兴学科中的作用。

Introduction to quality engineering. designing quality into products a

Abstract: Contents: Variety and Quality. Variability loss and tolerance. Determining tolerances. Tolerance design and experimental design. Offline and online quality control. Parameter design and tolerance design: case study. Experimental design for smaller is better characteristics. Experimental design for larger is better characteristics. Bypassing the S/N ratio: spring experiment. Experimental design for dynamic characteristics.

Assessing Public Opinions of and Interest in New Vehicle Technologies: An Austin Perspective

Abstract: Technological advances are bringing connected and autonomous vehicles (CAVs) to the ever- evolving transportation system. Anticipating the public acceptance and adoption of these technologies is important. A recent internet-based survey was conducted polling 347 Austinites to understand their opinions on smart-car technologies and strategies. Ordered-probit and other model results indicate that respondents perceive fewer crashes to be the primary benefit of autonomous vehicles (AVs), with equipment failure being their top concern. Their average willingness to pay (WTP) for adding full (Level 4) automation ($7,253) appears to be much higher than that for adding partial (Level 3) automation ($3,300) to their current vehicles. This study estimates the impact of demographics, built-environment variables, and travel characteristics on Austinites’ WTP for adding such automations and connectivity to their current and coming vehicles. It also estimates adoption rates of shared autonomous vehicles (SAVs) under different pricing scenarios ($1, $2, and $3 per mile), choice dependence on friends’ and neighbors’ adoption rates, and home-location decisions after AVs and SAVs become a common mode of transport. Higher-income, technology-savvy males, living in urban areas, and those who have experienced more crashes have a greater interest in and higher WTP for the new technologies, with less dependence on others’ adoption rates. Such behavioral models are useful to simulate long-term adoption of CAV technologies under different vehicle pricing and demographic scenarios. These results can be used to develop smarter transportation systems for more efficient and sustainable travel.

DEMATEL Technique: A Systematic Review of the State-of-the-Art Literature on Methodologies and Applications

Abstract: Decision making trial and evaluation laboratory (DEMATEL) is considered as an effective method for the identification of cause-effect chain components of a complex system. It deals with evaluating interdependent relationships among factors and finding the critical ones through a visual structural model. Over the recent decade, a large number of studies have been done on the application of DEMATEL and many different variants have been put forward in the literature. The objective of this study is to review systematically the methodologies and applications of the DEMATEL technique. We reviewed a total of 346 papers published from 2006 to 2016 in the international journals. According to the approaches used, these publications are grouped into five categories: classical DEMATEL, fuzzy DEMATEL, grey DEMATEL, analytical network process- (ANP-) DEMATEL, and other DEMATEL. All papers with respect to each category are summarized and analyzed, pointing out their implementing procedures, real applications, and crucial findings. This systematic and comprehensive review holds valuable insights for researchers and practitioners into using the DEMATEL in terms of indicating current research trends and potential directions for further research.