Sharif Digital Repository

Upper bounds for the 2-hued chromatic number of graphs in terms of the independence number

Author

Dehghan, A.

Publisher

Elsevier,

Pub. Year

2012

Subjects

2-hued chromatic number. / 2-hued coloring. / Independence number. / Probabilistic method. / Chromatic number. / Chromatic number of graphs. / Graph G. / Independence number. / Probabilistic methods. / Regular graphs. / Two-color. / Upper Bound. / Networks (circuits) / Graph theory.

Studying the Mechanistic Behavior of Heavy Oil Displacement Using a Group of Alkalis and Surfactant Mixtures

Author

Dehghan, A. A.

Pub. Year

2015

Subjects

Surfactant. / Surface active agents. / Chemical flooding. / Heavy oil. / IFT. / Surfactant mixture. / Emulsions.

Studying the mechanistic behavior of heavy oil displacement using a group of alkalis and surfactant mixtures

Author

Dehghan, A. A.

Publisher

Taylor and Francis Ltd,

Pub. Year

2015

Subjects

Emulsion. / Surfactant. / Surface active agents. / Chemical flooding. / Heavy oil. / IFT. / Surfactant mixture. / Emulsions.

Acidic heavy oil recovery using a new formulated surfactant accompanying alkali–polymer in high salinity brines

Author

Dehghan, A. A.

Pub. Year

2017

Subjects

Emulsion. / EOR. / Heavy oil. / Anionic surfactants. / Crude oil. / Effluents. / Emulsification. / Emulsions. / Floods. / Oil well flooding. / Polymers. / Surface active agents. / Well flooding. / Alkali/surfactant/polymer. / Chemical flooding. / Continuous monitoring. / Differential pressures. / High salinity brines. / High temperature and pressure. / Residual oil removal. / Surfactant solution. / Heavy oil production.

Investigating the emulsion behavior of heavy crude oil in presence of a new designed surfactant and a group of Alkalis

Author

Dehghan, A. A.

Publisher

European Association of Geoscientists and Engineers, EAGE,

Pub. Year

2013

Adaptive nonlinear observer design using feedforward neural networks

Author

Dehghan Nayeri, M. R.

Publisher

Sharif University of Technology,

Pub. Year

2005

Subjects

Algorithms. / Backpropagation. / Computer simulation. / Estimation. / Mathematical models. / Multilayer neural networks. / Backpropagation algorithm. / Linearly parameterized neural networks (LPNN) / Feedforward neural networks. / Neural network. / Non-linear dynamics.

On the constitutive modeling and microstructural evolution of hot compressed A286 iron-base superalloy

Author

Dehghan, H.

Pub. Year

2013

Subjects

Dynamic recrystallization. / Flow curve. / Hot compression. / Hot deformation. / Superalloy. / Continuous dynamic recrystallization. / Deformation temperatures. / Discontinuous dynamic recrystallization. / Flow curves. / High strain rates. / Hot compression tests. / Low strain rates. / Temperature range. / Compression testing. / Crystal microstructure. / Hot pressing. / Hot working. / Hyperbolic functions. / Superalloys. / Strain rate.

HODA: Hardness-oriented detection of model extraction attacks

Author

Sadeghzadeh, A. M.

Pub. Year

2024

Subjects

Adversarial machine learning. / Hardness of samples. / Extraction. / Graphic methods. / Learning systems. / Closed box. / Computational modelling. / Histogram. / Machine-learning. / Model extraction. / Model stealing. / Predictive models. / Training data. / Hardness.

On the Complexity of Deciding Whether the Regular Number is at Most Two

Author

Dehghan, A.

Pub. Year

2014

Subjects

Computational complexity. / Edge-partition problems. / Not-All-Equal 3-Sat. / Regular number.

Phase behavior and interfacial tension evaluation of a newly designed surfactant on heavy oil displacement efficiency; effects of salinity, wettability, and capillary pressure

Author

Dehghan, A. A.

Pub. Year

2015

Subjects

Capillarity. / Crude oil. / Effluents. / Emulsification. / Enhanced recovery. / Floods. / Oil shale. / Oil well flooding. / Petroleum reservoir engineering. / Petroleum reservoir evaluation. / Petroleum reservoirs. / Phase behavior. / Porous materials. / Reservoirs (water) / Sandstone. / Surface active agents. / Surface tension. / Well flooding. / Wetting. / Application of surfactants. / Capillary desaturation. / Chemical flooding. / Differential pressures. / Heavy oil. / Heavy oil recovery process. / Laboratory investigations. / Relative permeability. / Heavy oil production.

Interfacial tension and wettability change phenomena during alkali-surfactant interactions with acidic heavy crude oil

Author

Dehghan, A. A.

Pub. Year

2015

Subjects

Contact angle. / Crude oil. / Microemulsions. / Mixtures. / Oil shale. / Saline water. / Sodium. / Underground reservoirs. / Wetting. / Chemical concentrations. / Highly reactive material. / Oil recovery efficiency. / Sodium metaborate. / Surfactant interaction. / Surfactant solution. / Synergistic effect. / Three-phase regions. / Surface active agents.

Evaluation of chemicals interaction with heavy crude oil through water/oil emulsion and interfacial tension study

Author

Dehghan, A. A.

Pub. Year

2013

Subjects

Chemical enhanced oil recoveries. / Droplet size distributions. / Emulsion droplets. / Emulsion stability. / Microscopic image. / Salinity tolerance. / Surfactant solution. / Three-phase regions. / Crude oil. / Emulsions. / Enhanced recovery. / Image processing. / Mixtures. / Petroleum reservoirs. / Surface active agents. / Surface tension. / Emulsification.

Investigating the fracture network effects on sweep efficiency during wag injection process

Author

Dehghan, A. A.

Pub. Year

2012

Subjects

Fractured reservoir. / Glass micromodel. / Water flooding. / Capillary force. / Capillary numbers. / Driving forces. / Gas injection. / Improve oil recovery. / Injection mode. / Injection process. / Liquid bridge. / Matrix blocks. / Microscopic displacement. / Microscopic views. / Network systems. / Oil films. / Oil recoveries. / Optimum rate. / Pore scale. / Potential applications. / Recovery curves. / Recovery efficiency. / Recovery mechanisms. / Sweep efficiency. / Three phasis. / Viscous forces. / WAG. / Water-alternating-gas injection. / Computer system recovery. / Efficiency. / Fracture. / Gases. / Petroleum reservoirs. / Recovery. / Well flooding. / Water injection. / Displacement. / Enhanced oil recovery. / Fluid injection. / Fracture network. / Matrix. / Reservoir flooding. / Gastropoda.

Algorithmic complexity of proper labeling problems

Author

Dehghan, A.

Pub. Year

2013

Subjects

Computational complexity. / Fictional coloring. / Gap vertex-distinguishing edge colorings. / Multiplicative 1, 2, 3-conjecture. / Multiplicative vertex-coloring weightings. / Proper labeling. / Algorithmic complexity. / Edge coloring. / Np-completeness. / Polynomial-time algorithms. / Vertex-coloring. / Computer science. / Vertex-labeling by maximum 1, 2, 3-Conjecture.

Interfacial tension and wettability change phenomena during alkali-surfactant interactions with acidic heavy crude oil

Author

Dehghan, A. A.

Publisher

American Chemical Society,

Pub. Year

2015

Subjects

Contact angle. / Crude oil. / Microemulsions. / Mixtures. / Oil shale. / Saline water. / Sodium. / Underground reservoirs. / Wetting. / Chemical concentrations. / Highly reactive material. / Oil recovery efficiency. / Sodium metaborate. / Surfactant interaction. / Surfactant solution. / Synergistic effect. / Three-phase regions. / Surface active agents.

Phase behavior and interfacial tension evaluation of a newly designed surfactant on heavy oil displacement efficiency; effects of salinity, wettability, and capillary pressure

Author

Dehghan, A. A.

Publisher

Elsevier,

Pub. Year

2015

Subjects

Interfacial tension. / Surfactant. / Capillarity. / Crude oil. / Effluents. / Emulsification. / Enhanced recovery. / Floods. / Oil shale. / Oil well flooding. / Petroleum reservoir engineering. / Petroleum reservoir evaluation. / Petroleum reservoirs. / Phase behavior. / Porous materials. / Reservoirs (water) / Sandstone. / Surface active agents. / Surface tension. / Well flooding. / Wetting. / Application of surfactants. / Capillary desaturation. / Chemical flooding. / Differential pressures. / Heavy oil. / Heavy oil recovery process. / Laboratory investigations. / Relative permeability. / Heavy oil production.

Preparation and characterization of a composite biomaterial including starch micro/nano particles loaded chitosan gel

Author

Dehghan Baniani, D.

Pub. Year

2017

Subjects

Compressive modulus. / Design of experiments (DOE) / Micro/nano particles. / Thermosensitive chitosan hydrogel. / Analysis of variance (ANOVA) / Chitin. / Chitosan. / Compression testing. / Density (specific gravity) / Design of experiments. / Gelation. / Particle size. / Particle size analysis. / Scaffolds (biology) / Starch. / Chitosan hydrogel. / Compressive moduli. / Hydrogel composites. / Micro/nano particle. / Surface response method. / Hydrogels.

Not-all-equal and 1-in-degree decompositions: Algorithmic complexity and applications

Author

Dehghan, A.

Publisher

Springer New York LLC,

Pub. Year

2018

Subjects

1-in-Degree decomposition. / Not-All-Equal decomposition. / Total perfect dominating set. / Zero-sum flow. / Zero-sum vertex flow. / Computational complexity. / Matrix algebra. / Parallel processing systems. / Polynomial approximation. / Vector spaces. / Algorithmic complexity. / Bipartite graphs. / Complexity results. / Dominating sets. / Null space. / Polynomial-time algorithms. / Sharp contrast. / Zero sums. / Graph theory.

On the difference between chromatic number and dynamic chromatic number of graphs

Author

Ahadi, A.

Publisher

Elsevier,

Pub. Year

2012

Subjects

Dynamic coloring. / Independent number. / Vertex coloring.

Effect of vortex generators on hydrodynamic behavior of an underwater axisymmetric hull at high angles of attack

Author

Dehghan Manshadi, M.

Publisher

Springer Verlag,

Pub. Year

2017

Subjects

Computational fluid dynamics (CFD) / Oil flow visualization. / Vortex generator. / Wind tunnel.