Mojtaba Mazaheri - Academia.edu (original) (raw)
Papers by Mojtaba Mazaheri
Applied Composite Materials
The paper entitles as "What connects entangled photons?" has discussed how entangled photons are ... more The paper entitles as "What connects entangled photons?" has discussed how entangled photons are linked to each other? This paper proposes a model that is realistic and local, meaning that it does not involve any nonlocal action or hidden variables. The paper presents a local realistic model that refutes Bell's theorem and explains entanglement swapping and teleportation in terms of initial conditions and conservation of spin angular momentum. The paper claims that the model is consistent with quantum mechanics and reproduces the quantum mechanical predictions for expectation
Soft Matter
A micro-mechanical model was developed to describe the electrical percolation and effective elect... more A micro-mechanical model was developed to describe the electrical percolation and effective electrical conductivity of the nanocomposites containing fillers with different shapes such as graphene nanoplatelets, carbon blacks, and carbon...
Environmental Science & Technology, 2008
An index system of comprehensive evaluation of eco-environment and the background database on Sic... more An index system of comprehensive evaluation of eco-environment and the background database on Sichuan's eco-environment were established using RS/GIS technology,and an eco-environment model was then constructed based on the Technical Criterion for Eco-environmental Status Evaluation issued by the National Monitoring General Center.This paper presents the outcomes of the analysis of the Province's eco-environment by means of overlay analysis using the above-mentioned model.
On the test rig of a small-sized fluidized bed an experimental research was conducted of the form... more On the test rig of a small-sized fluidized bed an experimental research was conducted of the formation of nitrous oxide during the combustion of anthracite coke. It has been found that the oxidation reaction of HCN during the combustion of the coke represents an avenue of conversion of coke nitrogen to N_2O. At the same time the multi-phase reaction of NO and coke surface is also a kind of generation path of N_2O. The separation-out of HCN is a result of the further devolatilization during the combustion of coke. On completion of the coke devolatilization process N_2O has originated from the gas-solid multi-phase reaction of NO and coke surface.
Journal of Physics B: Atomic, Molecular and Optical Physics, 2021
We theoretically investigate quantum entanglement and coherence in a hybrid Laguerre-Gaussian rot... more We theoretically investigate quantum entanglement and coherence in a hybrid Laguerre-Gaussian rotating cavity optomechanical system with two-level atoms, where cavity and mechanical modes are coupled through the exchange of orbital angular momentum. Our study shows that the injection of atoms with a suitable choice of the physical parameters can significantly improve the degree of optomechanical entanglement in all aspects. In the study of quantum coherence research, we show more comprehensively the negative and positive effects of atoms on the coherence. The result obtained is that only when the atom is significantly offresonant to driving field, the coupling strength in between the atoms and light field increases and the quantum coherence can be enhanced, otherwise it will reduce quantum coherence. In addition, the atomic decay suppresses quantum coherence phenomenon.
Annals of Palliative Medicine, 2021
Background: Elevated B-type natriuretic peptide (BNP) is closely related to preeclampsia. Whether... more Background: Elevated B-type natriuretic peptide (BNP) is closely related to preeclampsia. Whether it is a predictor of adverse outcomes in preeclampsia is unclear. This study aimed to investigate the relationship between BNP and adverse outcomes of preeclampsia, and to establish the prediction models and nomograms based on BNP. Methods: A retrospective analysis was conducted involving 284 women with preeclampsia admitted to a tertiary hospital from January 2017 to July 2019. Logistic regression and receiver operating characteristic (ROC) curve were used to analyze the relationship between BNP and adverse outcomes. Multivariate logistic regression was used to establish the models for predicting adverse outcomes. Then the nomogram and ROC curve of the models were generated. Results: In preeclampsia, BNP is a risk factor for adverse outcomes, and as the level of BNP increases, the incidence of adverse outcomes increases. Preeclampsia with BNP >118 pg/mL was associated with a significantly increased risk of adverse outcomes. The results showed that BNP has a predictive value for adverse maternal outcomes, and the area under the ROC curve (AUC) was 0.739 [P<0.001, 95% confidence interval (CI): 0.684-0.789]. Then, the prediction models for adverse maternal and perinatal outcomes based on BNP combined with other multi-factors were established. The discriminative ability of the 2 models was found to be good, the AUC was 0.844 (95% CI: 0.796-0.884) and 0.792 (95% CI: 0.740-0.838), respectively. Therefore, BNP was shown to significantly improve the discriminative ability of the prediction models. Conclusions: The BNP is an important risk factor for evaluating the adverse outcomes of preeclampsia.
Science China Physics, Mechanics & Astronomy, 2019
We theoretically investigate optomechanical force sensing via precooling and quantum noise cancel... more We theoretically investigate optomechanical force sensing via precooling and quantum noise cancellation in two coupled cavity optomechanical systems. We show that force sensing based on the reduction of noise can be used to dramatically enhance the force sensing and that the precooling process can effectively improve the quantum noise cancellation. Specifically, we examine the effect of optomechanical cooling and noise reduction on the spectral density of the noise of the force measurement; these processes can significantly enhance the performance of optomechanical force sensing, and setting up the system in the resolved sideband regime can lead to an optimization of the cooling processes in a hybrid system. Such a scheme serves as a promising platform for quantum back-action-evading measurements of the motion and a framework for an optomechanical force sensor.
Materials Research Express, 2019
Friction stir spot soldering of galvanized steel plates was carried out using Sn interlayer with ... more Friction stir spot soldering of galvanized steel plates was carried out using Sn interlayer with a pin-less tool without any form of brazing flux and the effect of tool rotational speed on the microstructure and mechanical properties of the joints was investigated. According to the rotational speeds, some intermetallic compounds were detected in the joint interface. Also, the intermetallic thickness increment was achieved with an increase in the rotational speed. As a solder joint, the shear test showed an outstanding result in the sample soldered at 1600 rpm and the fracture occurred in the base metal, which means the joint strength is higher than that of galvanized steel. However, at the other rotational speed fracture occurred along the interface at lower loads.
Journal of the Optical Society of America B, 2019
We have investigated the dynamical entanglement and quantum steering in a pulsed hybrid opto-elec... more We have investigated the dynamical entanglement and quantum steering in a pulsed hybrid opto-electro-mechanical system. Using the symmetric and asymmetric criteria, the possibilities of bipartite entanglement, one-way steering, two-way steering, and collective tripartite steering have been studied between different output modes. In addition, the influence of the squeezing parameter on the amount of tripartite steering measurement is also examined. The results show that a higher electro-mechanical coupling rate leads to stronger tripartite steering. The microwave cavity mode can enhance the output quantum steering and remotely steers the optical cavity. Thus, the slower mode can steer the faster mode. Such hybrid systems can serve as frequency converters between microwave and optical domains and can have a profound impact on building quantum networks of microwave-operated superconducting quantum computers.
Materials Science and Engineering: A, 2018
In this study, in-situ magnesium matrix surface nanocomposites were prepared by adding Al particl... more In this study, in-situ magnesium matrix surface nanocomposites were prepared by adding Al particles to an as-cast pure Mg ingot using friction stir processing (FSP). The effects of the number of FSP passes, tool design, rotational and travel speeds were investigated. Microstructural investigations showed a significant grain refinement owing to dynamic recrystallization. According to scanning electron microscopy examinations and X-ray diffraction results, Al 12 Mg 17 intermetallics were formed during FSP due to chemical reaction at the Al-Mg interface. As a result of severe plastic deformation, the intermetallic particles formed at nanometre size. X-ray diffraction showed that the crystalline size of intermetallic particles reached ≤50 nm, due to high material flow during FSP. The intermetallic formation and grain refining led to an increase in the hardness values (1.5 to 3 times) that of the as-cast pure Mg ingot.
Optics and Photonics Society of Iran, Mar 15, 2015
In this paper, a scheme is presented in which two distant and remote optoical modes entangle in t... more In this paper, a scheme is presented in which two distant and remote optoical modes entangle in the pulsed driving regimes. Micro-macro entanglement of light demonstrated experimentally and considered theoretically in one system with different macroscopic components. Two remote systems are derived by the pulsed driving sources. We have sent two squeezed states that both of them undergo a large displacements then interact with nanomechanical resonator and retrieve. Using homodyne detection scheme, the entanglement between these two retrieved states has been investigated.
Optics and Photonics Society of Iran, Mar 15, 2015
In this paper, we consider a system containing an optical cavity and a superconducting microwave ... more In this paper, we consider a system containing an optical cavity and a superconducting microwave cavity interacting via a nanomechanical resonator. Optical and microwave cavity modes are subsequently set at the blue-detuned and reddetuned regimes. We show the system exhibits an strong entanglement between optical and microwave modes in the bad cavity mode and rotating wave approximation.
Optics and Photonics Society of Iran, Feb 15, 2014
Journal of Magnetism and Magnetic Materials, 2012
We have investigated the effect of Ca substitution for Sr site on structural, magnetic and superc... more We have investigated the effect of Ca substitution for Sr site on structural, magnetic and superconducting properties of RuSr 2Àx Ca x Gd 1:4 Ce 0:6 Cu 2 O 10Àd system. In this system, the magnetic coupling of RuO 2 and CuO 2 plays an important role in magnetic and superconducting states. X-ray diffraction analysis shows that all samples are single phase and the lattice parameters decrease continuously by increasing Ca content. The onset superconducting transition temperature is found to decrease with Ca substitution. As Ca content increases, rotation of the RuO 6 octahedron increases and Ru-O(1)-Ru angle decreases. These variations strengthen the magnetic moments in the RuO 2 planes. The enhancement of weak ferromagnetic component and hole trapping by Ru magnetic moments in RuO 2 planes reduces the electrical conduction, and destroys the superconducting state in the system. Analysis of the resistivity data (r) based on the hoping conduction mechanism, indicates a variation of the hoping exponent (p) across the magnetic transition at T m. The hoping exponent p is not affected sharply by Ca concentration.
A facile synthesis of some biologically active disperse dyes derived from arylazonicotinates and ... more A facile synthesis of some biologically active disperse dyes derived from arylazonicotinates and their application on polyester fabrics
Applied Composite Materials
The paper entitles as "What connects entangled photons?" has discussed how entangled photons are ... more The paper entitles as "What connects entangled photons?" has discussed how entangled photons are linked to each other? This paper proposes a model that is realistic and local, meaning that it does not involve any nonlocal action or hidden variables. The paper presents a local realistic model that refutes Bell's theorem and explains entanglement swapping and teleportation in terms of initial conditions and conservation of spin angular momentum. The paper claims that the model is consistent with quantum mechanics and reproduces the quantum mechanical predictions for expectation
Soft Matter
A micro-mechanical model was developed to describe the electrical percolation and effective elect... more A micro-mechanical model was developed to describe the electrical percolation and effective electrical conductivity of the nanocomposites containing fillers with different shapes such as graphene nanoplatelets, carbon blacks, and carbon...
Environmental Science & Technology, 2008
An index system of comprehensive evaluation of eco-environment and the background database on Sic... more An index system of comprehensive evaluation of eco-environment and the background database on Sichuan's eco-environment were established using RS/GIS technology,and an eco-environment model was then constructed based on the Technical Criterion for Eco-environmental Status Evaluation issued by the National Monitoring General Center.This paper presents the outcomes of the analysis of the Province's eco-environment by means of overlay analysis using the above-mentioned model.
On the test rig of a small-sized fluidized bed an experimental research was conducted of the form... more On the test rig of a small-sized fluidized bed an experimental research was conducted of the formation of nitrous oxide during the combustion of anthracite coke. It has been found that the oxidation reaction of HCN during the combustion of the coke represents an avenue of conversion of coke nitrogen to N_2O. At the same time the multi-phase reaction of NO and coke surface is also a kind of generation path of N_2O. The separation-out of HCN is a result of the further devolatilization during the combustion of coke. On completion of the coke devolatilization process N_2O has originated from the gas-solid multi-phase reaction of NO and coke surface.
Journal of Physics B: Atomic, Molecular and Optical Physics, 2021
We theoretically investigate quantum entanglement and coherence in a hybrid Laguerre-Gaussian rot... more We theoretically investigate quantum entanglement and coherence in a hybrid Laguerre-Gaussian rotating cavity optomechanical system with two-level atoms, where cavity and mechanical modes are coupled through the exchange of orbital angular momentum. Our study shows that the injection of atoms with a suitable choice of the physical parameters can significantly improve the degree of optomechanical entanglement in all aspects. In the study of quantum coherence research, we show more comprehensively the negative and positive effects of atoms on the coherence. The result obtained is that only when the atom is significantly offresonant to driving field, the coupling strength in between the atoms and light field increases and the quantum coherence can be enhanced, otherwise it will reduce quantum coherence. In addition, the atomic decay suppresses quantum coherence phenomenon.
Annals of Palliative Medicine, 2021
Background: Elevated B-type natriuretic peptide (BNP) is closely related to preeclampsia. Whether... more Background: Elevated B-type natriuretic peptide (BNP) is closely related to preeclampsia. Whether it is a predictor of adverse outcomes in preeclampsia is unclear. This study aimed to investigate the relationship between BNP and adverse outcomes of preeclampsia, and to establish the prediction models and nomograms based on BNP. Methods: A retrospective analysis was conducted involving 284 women with preeclampsia admitted to a tertiary hospital from January 2017 to July 2019. Logistic regression and receiver operating characteristic (ROC) curve were used to analyze the relationship between BNP and adverse outcomes. Multivariate logistic regression was used to establish the models for predicting adverse outcomes. Then the nomogram and ROC curve of the models were generated. Results: In preeclampsia, BNP is a risk factor for adverse outcomes, and as the level of BNP increases, the incidence of adverse outcomes increases. Preeclampsia with BNP >118 pg/mL was associated with a significantly increased risk of adverse outcomes. The results showed that BNP has a predictive value for adverse maternal outcomes, and the area under the ROC curve (AUC) was 0.739 [P<0.001, 95% confidence interval (CI): 0.684-0.789]. Then, the prediction models for adverse maternal and perinatal outcomes based on BNP combined with other multi-factors were established. The discriminative ability of the 2 models was found to be good, the AUC was 0.844 (95% CI: 0.796-0.884) and 0.792 (95% CI: 0.740-0.838), respectively. Therefore, BNP was shown to significantly improve the discriminative ability of the prediction models. Conclusions: The BNP is an important risk factor for evaluating the adverse outcomes of preeclampsia.
Science China Physics, Mechanics & Astronomy, 2019
We theoretically investigate optomechanical force sensing via precooling and quantum noise cancel... more We theoretically investigate optomechanical force sensing via precooling and quantum noise cancellation in two coupled cavity optomechanical systems. We show that force sensing based on the reduction of noise can be used to dramatically enhance the force sensing and that the precooling process can effectively improve the quantum noise cancellation. Specifically, we examine the effect of optomechanical cooling and noise reduction on the spectral density of the noise of the force measurement; these processes can significantly enhance the performance of optomechanical force sensing, and setting up the system in the resolved sideband regime can lead to an optimization of the cooling processes in a hybrid system. Such a scheme serves as a promising platform for quantum back-action-evading measurements of the motion and a framework for an optomechanical force sensor.
Materials Research Express, 2019
Friction stir spot soldering of galvanized steel plates was carried out using Sn interlayer with ... more Friction stir spot soldering of galvanized steel plates was carried out using Sn interlayer with a pin-less tool without any form of brazing flux and the effect of tool rotational speed on the microstructure and mechanical properties of the joints was investigated. According to the rotational speeds, some intermetallic compounds were detected in the joint interface. Also, the intermetallic thickness increment was achieved with an increase in the rotational speed. As a solder joint, the shear test showed an outstanding result in the sample soldered at 1600 rpm and the fracture occurred in the base metal, which means the joint strength is higher than that of galvanized steel. However, at the other rotational speed fracture occurred along the interface at lower loads.
Journal of the Optical Society of America B, 2019
We have investigated the dynamical entanglement and quantum steering in a pulsed hybrid opto-elec... more We have investigated the dynamical entanglement and quantum steering in a pulsed hybrid opto-electro-mechanical system. Using the symmetric and asymmetric criteria, the possibilities of bipartite entanglement, one-way steering, two-way steering, and collective tripartite steering have been studied between different output modes. In addition, the influence of the squeezing parameter on the amount of tripartite steering measurement is also examined. The results show that a higher electro-mechanical coupling rate leads to stronger tripartite steering. The microwave cavity mode can enhance the output quantum steering and remotely steers the optical cavity. Thus, the slower mode can steer the faster mode. Such hybrid systems can serve as frequency converters between microwave and optical domains and can have a profound impact on building quantum networks of microwave-operated superconducting quantum computers.
Materials Science and Engineering: A, 2018
In this study, in-situ magnesium matrix surface nanocomposites were prepared by adding Al particl... more In this study, in-situ magnesium matrix surface nanocomposites were prepared by adding Al particles to an as-cast pure Mg ingot using friction stir processing (FSP). The effects of the number of FSP passes, tool design, rotational and travel speeds were investigated. Microstructural investigations showed a significant grain refinement owing to dynamic recrystallization. According to scanning electron microscopy examinations and X-ray diffraction results, Al 12 Mg 17 intermetallics were formed during FSP due to chemical reaction at the Al-Mg interface. As a result of severe plastic deformation, the intermetallic particles formed at nanometre size. X-ray diffraction showed that the crystalline size of intermetallic particles reached ≤50 nm, due to high material flow during FSP. The intermetallic formation and grain refining led to an increase in the hardness values (1.5 to 3 times) that of the as-cast pure Mg ingot.
Optics and Photonics Society of Iran, Mar 15, 2015
In this paper, a scheme is presented in which two distant and remote optoical modes entangle in t... more In this paper, a scheme is presented in which two distant and remote optoical modes entangle in the pulsed driving regimes. Micro-macro entanglement of light demonstrated experimentally and considered theoretically in one system with different macroscopic components. Two remote systems are derived by the pulsed driving sources. We have sent two squeezed states that both of them undergo a large displacements then interact with nanomechanical resonator and retrieve. Using homodyne detection scheme, the entanglement between these two retrieved states has been investigated.
Optics and Photonics Society of Iran, Mar 15, 2015
In this paper, we consider a system containing an optical cavity and a superconducting microwave ... more In this paper, we consider a system containing an optical cavity and a superconducting microwave cavity interacting via a nanomechanical resonator. Optical and microwave cavity modes are subsequently set at the blue-detuned and reddetuned regimes. We show the system exhibits an strong entanglement between optical and microwave modes in the bad cavity mode and rotating wave approximation.
Optics and Photonics Society of Iran, Feb 15, 2014
Journal of Magnetism and Magnetic Materials, 2012
We have investigated the effect of Ca substitution for Sr site on structural, magnetic and superc... more We have investigated the effect of Ca substitution for Sr site on structural, magnetic and superconducting properties of RuSr 2Àx Ca x Gd 1:4 Ce 0:6 Cu 2 O 10Àd system. In this system, the magnetic coupling of RuO 2 and CuO 2 plays an important role in magnetic and superconducting states. X-ray diffraction analysis shows that all samples are single phase and the lattice parameters decrease continuously by increasing Ca content. The onset superconducting transition temperature is found to decrease with Ca substitution. As Ca content increases, rotation of the RuO 6 octahedron increases and Ru-O(1)-Ru angle decreases. These variations strengthen the magnetic moments in the RuO 2 planes. The enhancement of weak ferromagnetic component and hole trapping by Ru magnetic moments in RuO 2 planes reduces the electrical conduction, and destroys the superconducting state in the system. Analysis of the resistivity data (r) based on the hoping conduction mechanism, indicates a variation of the hoping exponent (p) across the magnetic transition at T m. The hoping exponent p is not affected sharply by Ca concentration.
A facile synthesis of some biologically active disperse dyes derived from arylazonicotinates and ... more A facile synthesis of some biologically active disperse dyes derived from arylazonicotinates and their application on polyester fabrics