390 research outputs found
A Critique of the Correction of Nizamiâs Khamseh by Basir Mozhdehi Compared with Corrections of Vahid Dastgerdi and Moscow
No full textUntil now we have been familiar with several corrections of Nizamiâs Khamseh like Vahid Dastgerdi, Moscow, Servatian and Barat Zanjani but in recent years a new correction has been published by Samieh Basir Mozhdehi (reviewed by Baha al-Din Khoramshahi) whose first and second imprints were published by Dustan publishing in 1383 and 1388 respectively. Such correction has been done based on the so-called version of Saâdloo (due to the fact that this version has been found in a family with the very name) which belongs to eight century (A.H) and via contrasting with versions of central library of Tehran University, Vahid Dastgerdi and Russian Academy of Science. The author thinks that her findings and understandings of the verses, using the most correct variants (in her view), considering the rules of rhyme, styles of poetry, prosody and other rhetorical techniques, and using the version of Saâdloo as the basis of her correction have altogether made her correction more authentic and closer to the main version of Nizamiâs work.
It should be mentioned that although this correction is recent and could apply the results of new sciences besides having access to two authentic versions of Vahid and Moscow to provide a better work than the predecessorsâ, it is unfortunately one of the corrections with most mistakes and problems. While indicating to some verses in this correction and comparing it with the versions of Vahid and Moscow (that the corrector has acknowledged her correction has been contrasted particularly with these two ones), this research aims to show that such correction is not authentic. The important point is that, contrary to the words of author about paying attention to poetic styles and techniques, the reader finds out after close reading that unfortunately the corrector lacks sufficient knowledge about such rules and even the morphology and poetic space of Nizami
On a Class of Banach Sequence Spaces Analogous to the Space of Popov
No full textAbstract Azimi and Ledari have introduced a class of hereditarily p Banach spaces (Z p ) analogous to the space of Popov. We show that (i). The Banach space
Application of the chi(2) principle and unbiased predictive risk estimator for determining the regularization parameter in 3-D focusing gravity inversion
No full textabstract: The χ[superscript 2] principle and the unbiased predictive risk estimator are used to determine optimal regularization parameters in the context of 3-D focusing gravity inversion with the minimum support stabilizer. At each iteration of the focusing inversion the minimum support stabilizer is determined and then the fidelity term is updated using the standard form transformation. Solution of the resulting Tikhonov functional is found efficiently using the singular value decomposition of the transformed model matrix, which also provides for efficient determination of the updated regularization parameter each step. Experimental 3-D simulations using synthetic data of a dipping dike and a cube anomaly demonstrate that both parameter estimation techniques outperform the Morozov discrepancy principle for determining the regularization parameter. Smaller relative errors of the reconstructed models are obtained with fewer iterations. Data acquired over the Gotvand dam site in the south-west of Iran are used to validate use of the methods for inversion of practical data and provide good estimates of anomalous structures within the subsurface.This is a pre-copy-editing, author-produced PDF of an article accepted for publication in GEOPHYSICAL JOURNAL INTERNATIONAL following peer review. The definitive publisher-authenticated version Vatankhah, Saeed, Ardestani, Vahid E., & Renaut, Rosemary A. (2015). Application of the chi(2) principle and unbiased predictive risk estimator for determining the regularization parameter in 3-D focusing gravity inversion. GEOPHYSICAL JOURNAL INTERNATIONAL, 200(1), 265-277. http://dx.doi.org/10.1093/gji/ggu397 is available online
Git-based platform for distributed learning communities
No full textThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 67-69).Instructors use software called learning management systems to administer online courses. Traditionally these digital platforms mimic physical classrooms, but technology opens up potential for new types of interactions. In this thesis, we develop a learning management system on top of Git to create a learning environment that encourages collaboration and exploration. We discuss how it was designed, the underlying pedagogy, the technical implementation, and the results of a pilot online class, with 100 learners lasting 6 weeks. The platform architecture developed in this project can be replicated and reused for other online courses with similar goals.by Vahid Fazel-Rezai.M. Eng
Control and safety of fully actuated and underactuated nonlinear systems: from adaptation to robustness to optimality
No full textThe state-of-the-art quadratic program-based control Lyapunov-control barrier function (QP-CLBF) is a powerful control approach to balance safety and stability in a pointwise optimal fashion. However, under this approach, modeling inaccuracies may degrade the performance of closed-loop systems and cause a violation of safety-critical constraints. This thesis extends the recently-developed QP-CLBF through the derivation of five novel robust quadratic program-based adaptive control approaches for fully actuated and underactuated nonlinear systems with a view toward adapting to unknown parameters, being robust to unmodeled dynamics and disturbances, ensuring the system remains in safe sets and being optimal with respect in a pointwise fashion. Simulation and quantitative results demonstrate the superiority of proposed approaches over the baseline methods.Ph.D
A Hypothesis about the Author of Aja’ib al-Dunya
No full textAja’ib al-Dunya is one of the most famous Books of Wonders in Persian which has had a great impact on later works. Some scholars reject the attribution of this book to Abol-moayyed Balkhi, but identifying the author is a question that has so far remained unanswered. In the book Aja’ib Va Ghara’ib, Azari Esfarayeni referred to this book 14 times. In one of them, he attributed the book to Naser Khosrow. In this research, the author seeks to verify the accuracy of this attribution. The study demonstrates that the quotations made by Azari are available in the mentioned sources, and we can trust his honesty. Comparing those 14 stories shows that Azari used the same Aja’ib al-Dunya which is now available. Additionally, the examination of biographies and Naser Khosrow's works shows that he was probably interested in this branch of knowledge in an episode of his life. Therefore, it can be concluded that Azari Esfrayeni's statement is probably true and the book Aja’ib al-Dunya may have been composed by Naser Khosrow before converting to the Isma’ili thought and being entitled “Hojjat of Khorasan Island”
Studying the effect of Aesop's legends and stories on Kalila-wa-Dimna written by Ibn-e-Moghaffa
No full textTo cite this paper: SabzianPoor V and Hassanzadeh A. 2014. Studying the effect of Aesop's legends and stories on Kalila-wa-Dimna written by Ibn-eMoghaffa. J. Educ. Manage. Stud., 4(3): 712-718. 712 Studying the effect of Aesop's legends and stories on Kalila-wa-Dimna written by Ibn-e-Moghaffa Vahid SabzianPoor and Amiraslan Hassanzadeh Department of Human Sciences, Kermanshah University, Kermanshah, Iran *Corresponding author's Email: [email protected]; [email protected] ABSTRACT: Greek Aesop's legends book is one sample of allegory legends in western literature that has been translated into all known languages in the world. In eastern literature, the book Kalila-wa-Dimna is the invaluable one translated by Ibn-e-Moghaffa into Arabic and some stories and legends were added to the original one to change it into a unique book for Arab world. Regarding the historical evidences about Greece and India and the dominance of Greeks before the composition of Bidpay stories in India, the present research is going to investigate on Aesop's stories and legends to study about the probable effect of it on Kalila-wa-Dimna. Findings in this research showed that at least 12 concepts of Aesop's legends have been represented in Kalila-wa-Dimna with trivial modifications
Fluid-mediated sources of granular temperature at finite Reynolds numbers
No full textWe derive analytical solutions for hydrodynamic sources and sinks to granular temperature in moderately dense suspensions of elastic particles at finite Reynolds numbers. Modelling the neighbour-induced drag disturbances with a Langevin equation allows an exact solution for the joint fluctuating acceleration–velocity distribution function P(v′,a′;t). Quadrant-conditioned covariance integrals of P(v′,a′;t) yield the hydrodynamic source and sink that dictate the evolution of granular temperature that can be used in Eulerian two-fluid models. Analytical predictions agree with benchmark data from particle-resolved direct numerical simulations and show promise as a general theory from gas–solid to bubbly flows.This article that has been published by Cambridge University Press as Lattanzi, Aaron M., Vahid Tavanashad, Shankar Subramaniam, and Jesse Capecelatro. "Fluid-mediated sources of granular temperature at finite Reynolds numbers." Journal of Fluid Mechanics 942 (2022): A7. DOI: 10.1017/jfm.2022.351. Copyright 2022 The Author(s). Attribution 4.0 International (CC BY 4.0). Posted with permission
Robust mixed-sensitivity H∞ control for a class of MIMO uncertain nonlinear IPM synchronous motor via T-S fuzzy model
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