Sharif Digital Repository

Effect of metal doping, boron substitution and functional groups on hydrogen adsorption of MOF-5: A DFT-D study

Author

Lotfi, R.

Pub. Year

2014

Subjects

Binding energy. / DFT. / Hydrogen adsorption. / Metal-organic framework (MOF)

Interaction of hydrogen molecules with perfect, defective and scandium doped polycyclic aromatic hydrocarbon structures

Author

Lotfi, R.

Pub. Year

2013

Subjects

Adsorption. / Graphene. / Hydrogen storage. / PAH. / Penetration.

A comparative study on hydrogen interaction with defective graphene structures doped by transition metals

Author

Lotfi, R.

Pub. Year

2014

Subjects

Defect. / Transition metal. / Binding energy. / Defects. / Gas adsorption. / Graphene. / Hydrogen. / Hydrogen storage. / Molecules. / Transition metals. / Comparative studies. / Defective structures. / DFT. / First-principles density functional theory. / Hydrogen adsorption. / Hydrogen interaction. / Reversible storage. / Sequential addition. / Scandium.

Interaction of hydrogen molecules with defective graphene sheets: An ab initio study

Author

Lotfi, R.

Pub. Year

2012

Drag performance of divergent tubular-truncated cones: A shape optimization study

Author

Lotfi, A.

Pub. Year

2012

Subjects

Wind tunnel. / Efficiency improvement. / Energy consuming devices. / Environmental pollutions. / Environmental structure. / Experimental data. / High velocity. / Laminar and turbulent flow. / Noise and vibration. / Numerical results. / Open circuit wind tunnels. / Optimum model. / Optimum shape. / Shape modification. / Streamwise velocity. / Truncated cone. / Upstream velocity. / Velocity profile. / Computational fluid dynamics. / Drag coefficient. / Drag reduction. / Energy management. / Industrial applications. / Reynolds number. / Turbulent flow. / Wind tunnels. / Velocity.

Global adaptive estimation of joint velocities in robotic manipulators

Author

Lotfi, N.

Pub. Year

2010

Subjects

Adaptive estimation. / Adaptive observer. / Asymptotic convergence. / Degrees of freedom. / Estimation errors. / Global estimation. / Globally convergent. / Joint velocity. / Low noise. / Minimal model. / Non-smooth. / Persistency of excitation. / Robot dynamics. / Robotic manipulators. / Simulation result. / State estimates. / Ultimate boundedness. / Estimation. / Excited states. / Flexible manipulators. / Machine design. / Robotics. / Robots.

Design, analysis and implementation of class-E ZCS/ZCDS power amplifier for any duty ratio with nonlinear output parasitic capacitance

Author

Lotfi, A.

Publisher

Springer New York LLC

Pub. Year

2016

Subjects

Class-E conditions. / MOSFET nonlinear output capacitance. / Power conversion efficiency. / Shunt inductor. / Zero current derivative switching (ZCDS) / Zero-Current Switching (ZCS) / Capacitance. / Conversion efficiency. / Drain current. / Efficiency. / MOSFET devices. / Nonlinear analysis. / Power MOSFET. / SPICE. / Switching. / Class E. / MOS-FET. / Zero-Current-Derivative Switching. / Power amplifiers.

A globally convergent observer for velocity estimation in robotic manipulators with uncertain dynamics

Author

Lotfi, N.

Pub. Year

2010

Subjects

Adaptive observer. / Asymptotic convergence. / Degrees of freedom. / Global estimation. / Globally convergent. / Joint velocity. / Low noise. / Minimal model. / Non-smooth. / Persistency of excitation. / Robot dynamics. / Robot manipulator. / Robotic manipulators. / Simulation result. / System state. / Uncertain dynamics. / Velocity estimation. / Excited states. / Flexible manipulators. / Machine design. / Robot applications. / Robots. / Robotics.

Smart transmission expansion planning based on unconventional high surge impedance loading line designs

Author

Lotfi, A.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2021

Subjects

Cost effectiveness. / Costs. / Electric lines. / Electric load flow. / Electric power transmission. / Electric power transmission networks. / Expansion. / Conventional design. / Conventional line. / Electrical parameter. / Phase configurations. / Power delivery. / Surge impedance loadings. / Transmission expansion. / Transmission expansion planning. / Smart power grids.

Finite element simulation of ultrasonic-assisted machining: a review

Author

Lotfi, M.

Publisher

Springer Science and Business Media Deutschland GmbH,

Pub. Year

2021

Subjects

Finite element method. / Machining. / Machining centers. / Chip formations. / Cutting forces. / Finite element simulations. / Machining Process. / Microstructure changes. / Review papers. / Simulation modeling process. / Tool wear. / Cutting tools.

Superstructure optimization in heat exchanger network (HEN) synthesis using modular simulators and a genetic algorithm framework

Author

Lotfi, R.

Pub. Year

2010

Subjects

Active X. / Commercial process simulators. / Efficient process. / Heat exchanger network. / Heat exchanger network synthesis. / Mathematical problems. / Modular simulator. / Non-isothermal mixing. / Nonconvex. / Optimal network configuration. / Optimization framework. / Rigorous model. / Save energy. / Simulation-based. / Superstructure optimization. / Chemical plants. / Heat exchangers. / Optimization. / Simulators. / Synthesis (chemical) / Genetic algorithms.

Boiling heat transfer on a high temperature silver sphere in nanofluid

Author

Lotfi, H.

Pub. Year

2009

Subjects

Boiling. / Boiling heat transfer. / Film boiling. / Heat transfer rate. / Heated spheres. / High temperature. / Mixture concentration. / Nanoparticle deposition. / Pure water. / Silver spheres. / Sphere surfaces. / Thin layers. / TiO. / Vapor films. / Water based. / Evaporation. / Heat exchangers. / Heat transfer. / Nanoparticles. / Nucleate boiling. / Quenching. / Silver. / Spheres. / Nanofluidics.

Active learning method to solve bin packing problems

Author

Lotfi, T.

Pub. Year

2004

Subjects

Combinatorial optimization. / Fuzzy algorithms. / Reinforcement learning. / Stage algorithm.