Loading...
Search for:
khosravi-zadeh--parvaneh
0.123 seconds
Total 579 records
A Semantic Valency Lexicon for Persian Predicates and Visualization of their Relations
, M.Sc. Thesis Sharif University of Technology ; Khosravi Zadeh, Parvaneh (Supervisor) ; Shojaei, Razieh (Supervisor)
Abstract
The highest and most difficult layer of Natural Language Processing, is the understanding of meaning. As a result, lexicons and annotated corpora are of the utmost importance in this area. However, the lack of such semantic resources, especially in Abstract Meaning Representation (AMR), is one of the main issues in this field for Persian Language. This work by modeling PropBank, a semantic valency lexicon for English predicates, is the first step towards building such lexicons for Persian Language with the focus on AMR. Thus, a guideline describing how to annotate the Persian predicates is provided which first evaluates the common structures between the two languages and then focuses on the...
Automatic Blank Verse Poet Identification Using Linguistic Features
, M.Sc. Thesis Sharif University of Technology ; Bahrani, Mohammad (Supervisor) ; Khosravi Zadeh, Parvaneh (Co-Advisor)
Abstract
Author identification using statistical methods is a branch of authorship attribution which is one of important problems in natural language processing. Using different statistical methods, an anonymous text is attributed to an author. One of the primary parts of the task is to choose the appropriate stylistic features of the text in order to study the significances of style. These features must be quantitatively studied and could be extracted in lexical level, character level, and syntactic or semantic levels. The next step is text classification in which different machine learning methods such as decision tree, Artificial Neural Networks, Naïve Bayes and other methods could be used....
Discussion of "prediction of discharge capacity over two-cycle labyrinth side weir using ANFIS" by M. cihan aydin and korhan kayisli
, Article Journal of Irrigation and Drainage Engineering ; Volume 143, Issue 7 , 2017 ; 07339437 (ISSN) ; Kabiri Samani, A ; Parvaneh, M ; Sharif University of Technology
2017
Spinel H4Ti5O12 nanotubes for Li recovery from aqueous solutions: Thermodynamics and kinetics study
, Article Journal of Environmental Chemical Engineering ; 2020 ; Shahnaz, G ; Askari, M ; Khosravi, A ; Hasan Zadeh, A ; Alamolhoda, A. A ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
In this study, H4Ti5O12 nanotubes have been prepared as Li+ adsorbent by acid treatment of Li4Ti5O12 nanotubes. Li4Ti5O12 nanotubes were synthesized via a hydrothermal method in which TiO2(B) nanNotubes were used as a precursor. The prepared Li-ion sieve showed a significant high ion-exchange capacity (160.6 mgg-1) for lithium ions due to its large specific surface area of 115.4 m2 g-1 compared to the other related studies. The kinetics and isotherm investigation revealed that the pseudo-second-order equation well described the adsorption kinetics, and the Langmuir model well fitted the isotherm data. Furthermore, the low value of adsorption energy obtained from the Dubinin-Radushkevitch...
Removal of Cu (ll) from industrial wastewater using poly (acrylamide-co-2-acrylamide-2-methyl propane sulfonic acid)/graphene oxide/sodium alginate hydrogel: Isotherm, kinetics, and optimization study
, Article Journal of Water Process Engineering ; Volume 42 , 2021 ; 22147144 (ISSN) ; Ghasemi, S ; Khosravi, A ; ZabihiSahebi, A ; Hasan Zadeh, A ; Borghei, S. M ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Here, Graphene oxide/poly (acrylamide -2-acrylamide-methyl-propanesulfonic acid)/sodium alginate (GO/PA-AMPS/SA) hydrogel was synthesized through a free-radical polymerization approach. The impact of Graphene Oxide (GO) content on mechanical strength, swelling behavior, and the adsorption performance of prepared hydrogel was studied. The operating parameters, including contact time, solution pH, and initial Cu(II) content on the adsorption capacity of the hydrogel, were studied. The maximum Cu(II) adsorption capacity of 230.8 mg/g was obtained for GO/PA-AMPS/SA under a pH of 5, the contact time of 270 min, and adsorbent content of 0.5 g/L at 25 °C. The high value of adsorption capacity after...
Spinel H4Ti5O12 nanotubes for Li recovery from aqueous solutions: Thermodynamics and kinetics study
, Article Journal of Environmental Chemical Engineering ; Volume 9, Issue 1 , 2021 ; 22133437 (ISSN) ; Ghasemi, S ; Askari, M ; Khosravi, A ; Hasan Zadeh, A ; Alamolhoda, A. A ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
In this study, H4Ti5O12 nanotubes have been prepared as Li+ adsorbent by acid treatment of Li4Ti5O12 nanotubes. Li4Ti5O12 nanotubes were synthesized via a hydrothermal method in which TiO2(B) nanNotubes were used as a precursor. The prepared Li-ion sieve showed a significant high ion-exchange capacity (160.6 mgg−1) for lithium ions due to its large specific surface area of 115.4 m2 g-1 compared to the other related studies. The kinetics and isotherm investigation revealed that the pseudo-second-order equation well described the adsorption kinetics, and the Langmuir model well fitted the isotherm data. Furthermore, the low value of adsorption energy obtained from the Dubinin-Radushkevitch...
Improving Efficiency of Labyrinth Side Weirs Using Asymmetric Geometry
, M.Sc. Thesis Sharif University of Technology ; Borghei, Mahmood (Supervisor)
Abstract
One of the most important methods of controlling discharge in water industry which is widely used in irrigation, water distribution, waste-water engineering, drainage, flood control and other water related projects, is side weir. The hydraulic behavior of flow over side weir is spatially varied flow with decreasing discharge. Various investigators have related the weir discharge coefficient as a function of main channel upstream Froude number and the fraction of weir height to upstream depth . Performance of sharp crested side weirs with extended length (as labyrinth side weir with asymmetric geometry) has been studied in this thesis. The variables for this study are height of weir ,...
Common Areas of Language Impairment in Persian-speaking Autistic Children
, M.Sc. Thesis Sharif University of Technology ; Khosravizadeh, Parvaneh (Supervisor)
Abstract
In qualitative content analysis research with the aim of identifying areas of language impairmenthigh-functioning Persian-speaking autistic children, ten subjects were observed during fifteen training sessions which were the cognitive block of a three-block training program. Each session lasted 90 minutes and was video recorded. Prior to this, focus group interviews with specialists and semi-structured interviews with mothers and parallel to that focus group interviews with mothers were handled all of which were audio recorded. After two levels of initial and second coding, a final list of areas of impairment in the language of high-functioning Persian-speaking autistic children, that...
Abstractive Persian User Reviews Summarization in the Frameworks of Graph Data Structure and Complex Networks
, M.Sc. Thesis Sharif University of Technology ; Khosravizadeh, Parvaneh (Supervisor)
Abstract
With the rapid development in information-communication technologies a huge amount of electronic documents has been produced and increase everyday in the world wide web. According to this wide information environment, summarization is critical for the users who digest this electronic big data. This research proposes two graph-based abstractive models for summarizing the Persian texts. A good summary should cover the overall context and the important subjects, and should be properly readable and coherent as well. Some permanent challenges in automatic text summarizations intended to increase the readability of output text, as well as covering all the main topics, and minimize the redundancy....
Effect of the shear loading direction on shear behavior of rock and finding new empirical method for determining JRC by fractal dimension
, Article Annual Conference of the Canadian Society for Civil Engineering 2007: Where the Road Ends, Ingenuity Begins, Yellowknife, NT, 6 June 2007 through 9 June 2007 ; Volume 1 , 2007 , Pages 259-267 ; Sadaghiani, M. H ; Askari, M ; Khosravi, M ; Sharif University of Technology
2007
Abstract
Effect of different conditions on shear behaviour of rock has been investigated by various researchers. As known, in larger scale the continuity of the rock material is interrupted by separated planes such as bedding planes, faults, shear zones, closure and the behaviour converts to be inelastic and anisotropic. Generally, discontinuities appear repeatedly in more than one preferential direction, creating a three dimensional structure, reducing its stiffness and shear strength as mechanical effects and increasing its transport velocity associated with discontinuity flow as hydraulic effects. They also make rock behavior more complex and different compared to the behavior of soil. According...
A Study on the Effect of Multi-domain Mental Conceptual Network on Metaphorical Creativity
, M.Sc. Thesis Sharif University of Technology ; Khosravizadeh, Parvaneh (Supervisor)
Abstract
This thesis was an attempt to find the effect of having multi-domain conceptual network on metaphorical creativity. The purpose of this research was to answer the following question: By extending and expanding the mental conceptual network, could one increase their potential creativity; In other words, is expansion of the mental conceptual network one of the parameters of creativity or not.To answer this question, a questionnaire and a test were developped. Through the questionnaire, we divided the sample group into the test and control groups. And the test indicated how creative each individual is.There were three different ways the sample group was divided. The criteria for dividing the...
A Comparison Between Path-based Traffic Assignment Algorithms
, M.Sc. Thesis Sharif University of Technology ; Zokaie Aashtiani, Hedayat (Supervisor)
Abstract
In the transportation litreture, many different algorithms have been proposed for solving traffic assignment problem based on the user-equilibrium principal.These algorithms are devided into two main groups: Path-based algorithms and arc-based algorithms. In the past, arc-based algorithms has attracted quite attention, but recent scientific progress in the computer science changed this viewpoint to the state of path-based algorithms. Much of the attention has been focused on three particular algorithms: the complementarity (C) algorithm, the gradient projection (GP) algorithm and the disaggregate simplicial decomposition (DSD) algorithm. In this thesis, these three algorithms have been...
Synonym and Antonym Extraction
, M.Sc. Thesis Sharif University of Technology ; Khosravizadeh, Parvaneh (Supervisor)
Abstract
One of the ways for semantic modelling of natural languages is to use the distributed representations of words. Formerly in order to produce the distributed representations of words several methods like LSA, LDA and other techniques taken from information retrieval were applied. The main idea presented by these methods is that the whole document consists of one central topic that has become hidden by the words it is made of. These models assign one general meaning to the whole document and do not regard words as semantically independent. However, each of the words of a document have specific senses that these models are not able to reflect. On the other hand efforts done in the field of...
Anisotropic dynamic loading effects on unsaturated sand shear modulus prepared at different compaction water contents
, Article Geotechnical Special Publication ; Volume 2024-February, Issue GSP 348 , 2024 , Pages 488-498 ; 08950563 (ISSN); 978-078448530-9 (ISBN); 978-078448531-6 (ISBN); 978-078448532-3 (ISBN); 978-078448533-0 (ISBN); 978-078448534-7 (ISBN); 978-078448535-4 (ISBN) ; Ahmadinezhad, A ; Jafarzadeh, F ; Khosravi, A ; Khosravi, M ; Sharif University of Technology
2024
Abstract
Dynamic properties of soil, such as shear modulus and damping ratio, are necessary for analyzing the dynamic response of the soil in geostructures. This study investigates the effects of partially inherent anisotropy and stress-induced anisotropy on the shear stiffness of unsaturated soil through a series of dynamic hollow cylinder tests at medium strain levels. The different inherent anisotropy in tested sand specimens was introduced through different compaction water contents in the sample preparation stage while keeping the void ratio nearly constant. Moreover, the influences of the angle of maximum principal stress, α, and intermediate principal stress parameter, b = (σ2 − σ3)/(σ1 − σ3),...
Cosmological constant potential: a resolution to the hubble tension via the cosmological sound horizon
, Article Physical Review D ; Volume 110, Issue 6 , 2024 ; 24700010 (ISSN) ; Sharif University of Technology
2024
Abstract
The cosmological constant term can be seen as a constant potential for a (scalar) field. In this viewpoint, at late times, the field is stopped rolling and behaves as a cosmological constant (w=-1). While at the early Universe, its kinetic term can be dominant and behaves as a stiff fluid (w=+1). This new phase lowers the cosmological sound horizon by increasing the Hubble parameter for very high redshifts. Consequently, the lower cosmological sound horizon results in the higher Hubble constant at the present time. This early phase ends before the photon decoupling, so we do not expect any new physics after the last scattering surface. We checked this model in the presence of (reduced) CMB,...
Frictional Contact Modeling Using a Node-to-Surface Procedure in Dynamic Problems
, M.Sc. Thesis Sharif University of Technology ; Khoei, Amir Reza (Supervisor)
Abstract
Contact happens when two bodies collide. Depending on our assumption, it can be considered as a frictional or frictionless contact. Here we have assumed that friction accompanies the contact phenomenon, hence it is called a frictional contact. For modeling contact problems, different procedures can be used such as node-to-node or node-to-surface patterns. Here we want to use the node-to-surface procedure to model the contact problem. The node-to-surface pattern has the capability to model interface behavior between different materials. By using the finite element method through numerical computations and also by applying constraint conditions which are related to contact conditions, we can...
Discharge coefficient of triangular and asymmetric labyrinth side weirs using the nonlinear PLS method
, Article Journal of Irrigation and Drainage Engineering ; Volume 142, Issue 11 , 2016 ; 07339437 (ISSN) ; Kabiri Samani, A ; Nekooie, M. A ; Sharif University of Technology
American Society of Civil Engineers (ASCE)
2016
Abstract
Side weirs are hydraulic control structures widely used in irrigation and drainage systems as well as wastewater treatment plants. These structures also serve as adjusting/diverting flow structures with a minimum head loss. In the present study, by applying experimental data of more than 400 laboratory tests and using the multivariable nonlinear partial least-squares (PLS) method, three nonlinear equations are proposed for discharge coefficient, CM, of triangular and asymmetric labyrinth side weirs. These equations relate the discharge coefficient to the relevant geometrical and hydraulic dimensionless characteristics of flow. Results indicate that the new proposed equations are more...
Semantic Role Labeling Using Dependency Trees of Persian Sentences
, M.Sc. Thesis Sharif University of Technology ; Khosravizadeh, Parvaneh (Supervisor)
Abstract
A semantic role labeler is a software that takes sentences as inputs and identifies the words or groups which have semantic roles such as Agent, Theme, Source, Instrument etc. The correct identification of semantic rols using computers can improve the quality of many natural language processing tasks such as information extraction, question and answering, text summarization and machine translation.Therefore a considerable amount of research has been carried out on this topic. Semantic role labelers normally use features extracted from the syntactic structure of the input sentences. That is why the syntactic representation used has a prominent role in the system's outcome. The research...
Designing and Implementation of a Morphological Analyzer for Central Kurdish Language
, M.Sc. Thesis Sharif University of Technology ; Khosravizadeh, Parvaneh (Supervisor) ; Veisi, Hadi (Supervisor)
Abstract
Morphological analysis of words plays a fundamental role in natural language processing applications such as spell checker, POS-tagging and machine translation. Among different dialects belonging to Kurdish, Northern Kurdish (Kurmanji), Central Kurdish (Sorani) and Southern Kurdish are the closest ones to each other. The central dialect of Kurdish is the second official language in Iraq and a large volume of text content is producing daily in this dialect. In this research, designing and implementation of a two-level morphological analyzer for the central Kurdish dialect is introduced. This analyzer is designed using an open source toolkit named HFST, which is a finite state transducer...
A parametric study on seismic characteristics of cold-formed steel shear walls by finite element modeling
, Article Advanced Steel Construction ; Volume 10, Issue 1 , 2014 , Pages 53-71 ; ISSN: 1816112X ; Rahmani, A ; Parvaneh, A ; Ronagh, H. R ; Sharif University of Technology
2014
Abstract
Shear wall panels, including cold-formed steel frames and its attached sheathing, are common lateral load resisting systems of cold-formed steel structures. In this paper, the finite element method is used to study the lateral performance of shear wall panels. The finite element model is validated against experimental results of other researchers. Using the validated model, a parametric study is described to determine strength, drift and seismic behavior of the shear wall panels. Based on the results, it is concluded that the initial stiffness and ultimate lateral strength are dramatically affected by the thickness of the frame members, type of sheathing material, edge screw spacing, height...