Patents Assigned to Amirkabir University of Technology
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Publication number: 20240074979Abstract: A method for fabricating a medical braided capsule may include braiding a multi-layer shell onto a powder injection pipe by moving the powder injection pipe linearly up and down in a braiding zone of a braiding machine, discharging a powder from the powder injection pipe into the multi-layer shell, and moving the powder injection pipe out of the multi-layer shell. Discharging the powder from the powder injection pipe into the multi-layer shell and moving the powder injection pipe out of the multi-layer shell are carried out simultaneously.Type: ApplicationFiled: November 9, 2023Publication date: March 7, 2024Applicants: Amirkabir University of Technology (Tehran Polytechnic) Amirkabir University of Technology (Tehran PInventors: Hadi Dabiryan, Saeed Hamze
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Patent number: 11891493Abstract: A method for producing a colloidal aphron/graphene hybrid fluid composition. The method may include forming a first mixture by mixing a graphene oxide aqueous solution and a biopolymer solution. The method may further include forming a second mixture by mixing the first mixture with at least an ionic-surfactant solution and a non-ionic surfactant solution.Type: GrantFiled: September 28, 2021Date of Patent: February 6, 2024Assignees: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mohammad Hossein Akhlaghi, Malek Naderi
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Publication number: 20240019467Abstract: A method for frequency estimation in a power system. The method includes detecting a condition of the power system, applying a first estimation process to a voltage signal of the power system responsive to a normal condition being detected, and applying a second estimation process to a current signal of the power system responsive to a fault condition being detected. The condition of the power system is detected utilizing a protective device. The condition of the power system includes one of a normal condition and a fault condition.Type: ApplicationFiled: August 3, 2023Publication date: January 18, 2024Applicants: Amirkabir University of Technology, VEBKO AmirkabirInventors: Seyed Soroush Karimi Madahi, Hossein Askarian Abyaneh, Farzad Razavi, Mohammad Parpaei, Davood Yoosefian
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Patent number: 11640006Abstract: A system for detecting a position of an ionizing radiation. The system includes a radiation detector including a plurality of cathode films, a plurality of anode strips sets, a plurality of insulator films, a conductive grid, and a drift region. Each set of the plurality of anode strips sets is disposed between a respective pair of adjacent cathode films of the plurality of cathode films. Each of the plurality of insulator films is disposed between a respective cathode film of the plurality of cathode films and a respective set of the plurality of anode strips sets. The conductive grid is disposed in parallel with the detection plane and exposed to the ionizing radiation. A drift region includes a region between the conductive grid and the detection plane. The radiation detector is configured to ionize a gas by generating an electric field inside the drift region.Type: GrantFiled: August 14, 2021Date of Patent: May 2, 2023Assignees: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Faiyaz Mohammadbaghery, Shahyar Saramad, Mojtaba Shamsaiezafarghandi
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Publication number: 20230106470Abstract: A method for synthesizing a nanohybrid comprising forming a polymer solution by dissolving carboxymethyl chitosan and gelatin in a 2-(N-Morpholino)ethanesulfonic acid (MES) buffer, forming a first solution by adding (3-Glycidyloxypropyl)trimethoxysilane (GPTMS) to the polymer solution, forming a second solution by adding an acid-hydrolyzed tetraethyl orthosilicate (TEOS) solution to the first solution, forming a third solution by adding a calcium chloride (CaCl2) solution to the second solution, forming a fourth solution by mixing the third solution with a solution of 1 ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS), forming a frozen nanohybrid, and thawing the frozen nanohybrid.Type: ApplicationFiled: December 2, 2022Publication date: April 6, 2023Applicants: Amirkabir University of Technology, National Institute for medical Research Development (NIMAD)Inventors: Shadab Bagheri khoulenjani, Hamid Mirzadeh, Nafiseh Olov, Roshanak Moradi, Saeid Amanpour
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Patent number: 11515641Abstract: A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value.Type: GrantFiled: March 20, 2021Date of Patent: November 29, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 11515640Abstract: A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value.Type: GrantFiled: February 21, 2021Date of Patent: November 29, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 11499919Abstract: A method for determining sucrose concentration in honey. The method includes preparing a sample of honey, stimulating the sample by emitting a first laser beam on the sample in a first stimulation direction, detecting a fluorescence spectrum from a first fluorescence emission emitted from the sample in a first detection direction, detecting a first pair of fluorescence peaks and a second pair of peak wavelengths in the fluorescence spectrum, and determining a sucrose concentration based on one of the first pair and the second pair utilizing a database. The database includes a plurality of predetermined sucrose concentrations associated with the first pair or the second pair.Type: GrantFiled: March 18, 2021Date of Patent: November 15, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Ali Bavali, Alireza Mashhadi, Amir Jafargholi, Mohsen Hashemi, Farzad Mokhtari
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Patent number: 11502383Abstract: An epsilon-and-mu-near-zero (EMNZ) metamaterial. The EMNZ metamaterial includes a waveguide. A length l of the waveguide satisfies a length condition according to l?0.1?, where ? is an operating wavelength of the EMNZ metamaterial. The EMNZ metamaterial further includes a magneto-dielectric material deposited on a lower wall of the waveguide. The waveguide includes an impedance surface placed on the magneto-dielectric material.Type: GrantFiled: November 12, 2020Date of Patent: November 15, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Publication number: 20220239534Abstract: A method for adaptive coding and modulation. The method includes generating a set of mapping functions and transmitting a tth set of transmit symbols where 1?t?T and T is a maximum number of symbol transmissions. Transmitting the tth set of transmit symbols includes transmitting each transmit symbol in the tth set of transmit symbols. Each transmit symbol is transmitted by a respective transmitter. Transmitting each transmit symbol includes generating a tth set of mapped symbols, generating each transmit symbol from the tth set of mapped symbols, and transmitting each transmit symbol. Generating the tth set of mapped symbols includes applying a mapping functions subset of the set of mapping functions on a respective data vector. Each mapping function in the mapping functions subset depends on a respective mapped symbol in an rth set of mapped symbols where 0?r?T.Type: ApplicationFiled: April 15, 2022Publication date: July 28, 2022Applicants: AmirKabir University of TechnologyInventors: Mohammad Sadegh Safari, Vahid Pourahmadi, Patrick Mitran
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Publication number: 20220083798Abstract: A method for generating at least one of a plurality of data samples in a first frequency band from measurements in a second frequency band. The method includes obtaining a first plurality of samples by measuring a plurality of frequency responses of an environment in the first frequency band, obtaining a second plurality of samples by measuring a first set of frequency responses of the environment in the second frequency band, obtaining a mapping model based on the first plurality of samples and the second plurality of samples, obtaining a third plurality of samples by measuring a second set of frequency responses of the environment in the second frequency band, and obtaining the at least one of the plurality of data samples by applying the mapping model on the third plurality of samples.Type: ApplicationFiled: October 25, 2021Publication date: March 17, 2022Applicants: Amirkabir University of TechnologyInventors: Mohammad Hadi Kefayati, Vahid Pourahmadi
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Publication number: 20220044042Abstract: A method for generating a data sample in a first frequency band from measurements in a second frequency band. The method includes obtaining a first plurality of samples, obtaining a second plurality of samples, obtaining a mapping model based on the first plurality of samples and the second plurality of samples, obtaining a third plurality of samples, and obtaining the data sample based on the mapping model and the third plurality of samples. Obtaining the first plurality of samples includes measuring a first frequency response of an environment in the first frequency band. Obtaining the second plurality of samples includes measuring a second frequency response of the environment in the second frequency band. Obtaining the third plurality of samples includes measuring a third frequency response of the environment in the second frequency band. Obtaining the data sample includes applying the mapping model on the third plurality of samples.Type: ApplicationFiled: October 25, 2021Publication date: February 10, 2022Applicants: Amirkabir University of TechnologyInventors: Mohammad Hadi Kefayati, Vahid Pourahmadi
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Publication number: 20220025483Abstract: A method for recovering metal oxides from a paint sludge. The method may include obtaining a first mixture by evaporating an organic part of the paint sludge. Evaporating the organic part of the paint sludge may include heating the paint sludge in a furnace. The method may further include precipitating a second mixture from the first mixture by mixing the first mixture and a sodium hydroxide solution. The method may further include recovering titanium dioxide from the second mixture by mixing the second mixture with a hydrochloric acid solution.Type: ApplicationFiled: August 7, 2021Publication date: January 27, 2022Applicant: Amirkabir University of TechnologyInventors: Malek Naderi, Davoud Fatmehsari Haghshenas, Arash Ghazitabar
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Publication number: 20220017720Abstract: A method for producing a colloidal aphron/graphene hybrid fluid composition. The method may include forming a first mixture by mixing a graphene oxide aqueous solution and a biopolymer solution. The method may further include forming a second mixture by mixing the first mixture with at least an ionic-surfactant solution and a non-ionic surfactant solution.Type: ApplicationFiled: September 28, 2021Publication date: January 20, 2022Applicants: Amirkabir University of TechnologyInventors: Mohammad Hossein Akhlaghi, Malek Naderi
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Publication number: 20220006199Abstract: A metamaterial loaded antenna. The metamaterial loaded antenna includes a dielectric substrate, a first arm, a second arm, a feed point, and a metamaterial structure. The first arm and the second arm are placed on the dielectric substrate. The feed point includes at least one gap between the first arm and the second arm. A metamaterial structure is inserted in the feed point. The metamaterial structure includes a single negative (SNG) metamaterial. The SNG metamaterial includes a first permittivity ?1 and a first permeability ?1. The first permittivity ?1 and the first permeability ?1 satisfy a condition according to ?1?1<0.Type: ApplicationFiled: September 20, 2021Publication date: January 6, 2022Applicants: Amirkabir University of TechnologyInventors: Amir Jafargholi, Seyed Saleh Mousavi Khaleghi, Kamyar Goudarzi, Mehran Ahadi, Parviz Parvin
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Publication number: 20210410055Abstract: A method for indoor localization based on previous activities. The method includes acquiring a target observation from a target user, adding the target observation to a target observations list of a plurality of observations lists, obtaining a target cluster for the target user, verifying that the target cluster satisfies a localization condition, replacing the target cluster with a substitute cluster responsive to the target cluster not satisfying the localization condition, obtaining an estimated location of the target user based on the target cluster responsive to the target cluster satisfying the localization condition, obtaining the estimated location based on the plurality of observations lists responsive to the substitute cluster not satisfying the localization condition, and storing the estimated location in a database. The target observation is acquired utilizing an access point.Type: ApplicationFiled: September 14, 2021Publication date: December 30, 2021Applicants: digikalaNext, Amirkabir University of TechnologyInventors: Mahan Tabatabaie, Ali Mohades Khorasani, Mohammad Ebrahim Shiri
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Publication number: 20210373185Abstract: A system for detecting a position of an ionizing radiation. The system includes a radiation detector including a plurality of cathode films, a plurality of anode strips sets, a plurality of insulator films, a conductive grid, and a drift region. Each set of the plurality of anode strips sets is disposed between a respective pair of adjacent cathode films of the plurality of cathode films. Each of the plurality of insulator films is disposed between a respective cathode film of the plurality of cathode films and a respective set of the plurality of anode strips sets. The conductive grid is disposed in parallel with the detection plane and exposed to the ionizing radiation. A drift region includes a region between the conductive grid and the detection plane. The radiation detector is configured to ionize a gas by generating an electric field inside the drift region.Type: ApplicationFiled: August 14, 2021Publication date: December 2, 2021Applicants: Amirkabir University of TechnologyInventors: Faiyaz Mohammadbaghery, Shahyar Saramad, Mojtaba SHAMSAIEZAFARGHANDI
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Patent number: 11147973Abstract: A circuit for charge-balanced current-controlled stimulation. The circuit includes a transistor differential pair, a first current mirror, a second current mirror, and a third current mirror. The transistor differential pair includes a first differential input node, a second differential input node, a first differential output node, a second differential output node, and a common node. The transistor differential pair is configured to generate a first differential current that passes through the first differential output node and a second differential current that passes through the second differential output node. The first current mirror is configured to generate a first mirrored current based on the first differential current. The second current mirror is configured to generate a second mirrored current based on the second differential current. The third current mirror is configured to generate a third mirrored current based on the first mirrored current.Type: GrantFiled: April 7, 2020Date of Patent: October 19, 2021Assignees: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventor: Mohammad Mahdi Ahmadi
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Patent number: 11128648Abstract: An improved system and method for detecting network anomalies comprises, in one implementation, a computer device and a network anomaly detector module executed by the computer device arranged to electronically sniff network traffic data in an aggregate level using a windowing approach. The windowing approach is configured to view the network traffic data through a plurality of time windows each of which represents a sequence of a feature including packet per second or flow per second. The network anomaly detector module is configured to execute a wavelet transform for capturing properties of the network traffic data, such as long-range dependence and self-similarity. The wavelet transform is a multiresolution transform, and can be configured to decompose and simplify statistics of the network traffic data into a simplified and fast algorithm.Type: GrantFiled: December 31, 2018Date of Patent: September 21, 2021Assignees: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Maryam Amirmazlaghani, Sajjad Hosseinzadeh
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Patent number: 11088458Abstract: A microstrip antenna is disclosed. The microstrip antenna includes a dielectric substrate with a first relative permittivity, a metal patch, and a magneto-dielectric superstrate. The metal patch is printed on the dielectric substrate, and the magneto-dielectric superstrate is placed above the metal patch.Type: GrantFiled: December 30, 2018Date of Patent: August 10, 2021Assignees: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Amir Jafargholi, Ali Jafargholi, Mehdi Veysi, Jun H. Choi