Ali Mammadov - Academia.edu (original) (raw)
Papers by Ali Mammadov
ArXiv, 2021
For the MIDOG mitosis detection challenge, we created a cascade algorithm consisting of a Mask-RC... more For the MIDOG mitosis detection challenge, we created a cascade algorithm consisting of a Mask-RCNN detector, followed by a classification ensemble consisting of ResNet50 and DenseNet201 to refine detected mitotic candidates. The MIDOG training data consists of 200 frames originating from four scanners, three of which are annotated for mitotic instances with centroid annotations. Our main algorithmic choices are as follows: first, to enhance the generalizability of our detector and classification networks, we use a state-of-the-art residual CycleGAN to transform each scanner domain to every other scanner domain. During training, we then randomly load, for each image, one of the four domains. In this way, our networks can learn from the fourth non-annotated scanner domain even if we don’t have annotations for it. Second, for training the detector network, rather than using centroid-based fixed-size bounding boxes, we create mitosis-specific bounding boxes. We do this by manually anno...
Management Science, 2014
In order to study the theoretical and methodological foundations of state regulation of interregi... more In order to study the theoretical and methodological foundations of state regulation of interregional integration of regional development in today's globalized economy, the analysis of management thought genesis to implement deep transformational changes in public administration of the region. The study author found that in any major scientific approach to understanding the process of integration is the development of links between different regions, combining them together, and the fact that sustainable regional development is an objective and manageable process the main role in which the state should play.
JOURNAL OF ADVANCES IN CHEMISTRY, 2014
By X-ray diffraction, differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) w... more By X-ray diffraction, differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) were investigated BaFe12-xAlxO19 hexaferrites with various concentrations of Al (x = 0.3, 0.9 and 1.2). Crystal structure of compounds was determined, and it determined that under normal condition (P = 0 GPa, T = 300 K) they possess structure is hexagonal symmetry with the space group P63/mmc. Replacing Fe3+ ions Al3+ with ions, on account of reducing ion radius, decrease of indices of parameters was occurred. This crystal structure is saved in a temperature range 30 - 950 ºC and structural phase transition do not occur. Energy supplied to a system is fully swallowed by a system, monotonic decrease is occurred in TGA curve and in DTA curve endo and exo effects do not occur.
Journal of Alloys and Compounds, 2017
The polycrystalline samples of the new ferroelectric ceramics ሺ1 − ݎܵሻݔ ଷ.ଷହ ܽܤ ଵ.ହ ܾܰ ଵ ܱ ... more The polycrystalline samples of the new ferroelectric ceramics ሺ1 − ݎܵሻݔ ଷ.ଷହ ܽܤ ଵ.ହ ܾܰ ଵ ܱ ଷ (SBN)-ሺݔሻܽܤ ସ ܰܽ ଶ ܾܰ ଵ ܱ ଷ (BNN) with potassium tungsten bronze structure were prepared using a high-temperature solid-state reaction technique. They are novel inorganic materials with potassium tungsten bronze structural type. The formation of the ceramics under the reported conditions has been confirmed by an X-ray diffraction technique. The ceramic microstructures were observed using scanning electron microscopy (SEM) techniques associated with energy dispersive X-ray spectroscopy (EDX) analysis. The SEM micrograph exhibits grain boundary distribution. Dielectric properties of the SBN-NBN compounds as a function of temperature (300-850 K) at frequencies 1-1000 KHz were studied. Detailed studies of variation of dielectric parameters with temperature and frequency confirmed the existence of ferroelectricity in these materials. The difference between the highfrequency dielectric constants and the low-frequency dielectric constants indicates that the ferroelectric phase transition in SBN-NBN compounds is of rather diffuse nature than relaxor type. According to the experimental data, it is suggested that ferroelectrics phase transition is a first-order transition.
Journal of Alloys and Compounds, 2015
Polyactive ® membranes show promising properties for CO 2 separation from flue gas. An investigat... more Polyactive ® membranes show promising properties for CO 2 separation from flue gas. An investigation of different module types using Polyactive ® membranes was carried out for this paper. A test rig was built to explore, amongst other process parameters, the pressure drop in envelope-type membrane modules. The experimental data and simulation results were compared with quite good consistency. This validation enabled further simulations for different modules in a virtual pilot plant configuration. Applying the data from the pilot plant simulation to a reference power plant, the scaled-up cascaded membrane system was analyzed using different membrane modules. Considering the required membrane area, energy consumption and pressure drop in different modules, a counter-current membrane module configuration exhibited the best performance and had a marginal advantage in comparison with the chemical absorption process.
Zeitschrift für Kristallographie - Crystalline Materials, 2014
The crystal structure of complex oxide ferroelectrics Ba
Journal of Crystallographic and Spectroscopic Research, 1990
Monoclinic (N2H6)3Zr2F13·F crystallizes in space group P21-C22 (No. 4) with unit cell dimensionsa... more Monoclinic (N2H6)3Zr2F13·F crystallizes in space group P21-C22 (No. 4) with unit cell dimensionsa=5.670(1),b=10.984(2),c=10.601(2) Å,ß=93.88(1)°,V=658.7(4) Å3 andZ=2. Two different types of N2H62+ ions are present. One is involved in strong H-bonds to F- ions in infinite chains running along the a axis (the shortest N-F distance is 2.437(5) Å), and the other links the structure through weaker bi- and trifurcated H-bonds to fluorine ligands of the Zr2F135- ions. The N-N bond lengths range from 1.430(5) to 1.446(5) Å with apparently no meaningful correlation to the type of N2H22+ ions. The Zr2F135- ions have very nearly C2 point symmetry and are formed by joining two distorted bicapped trigonal prisms of ZrF8-units through a common face. Distances of Zr-F terminal bonds range from 2.015(2) to 2.112(2) Å and of bridging bonds from 2.133(2) to 2.212(2) Å. (N2H6)3Hf2F13·F is isomorphous. The vibrational spectra of the two compounds are nearly identical, with the exception of a strong infrared band, which is assigned to a stretching mode with the moving central atom within the anion. The anion part of the spectrum is simple, showing broad unresolved bands. The cation part shows two types of N2H6– ions. H-Bonding is strongly present in the spectra, but no simple correlations with the H-bond strength is evident.
ArXiv, 2021
For the MIDOG mitosis detection challenge, we created a cascade algorithm consisting of a Mask-RC... more For the MIDOG mitosis detection challenge, we created a cascade algorithm consisting of a Mask-RCNN detector, followed by a classification ensemble consisting of ResNet50 and DenseNet201 to refine detected mitotic candidates. The MIDOG training data consists of 200 frames originating from four scanners, three of which are annotated for mitotic instances with centroid annotations. Our main algorithmic choices are as follows: first, to enhance the generalizability of our detector and classification networks, we use a state-of-the-art residual CycleGAN to transform each scanner domain to every other scanner domain. During training, we then randomly load, for each image, one of the four domains. In this way, our networks can learn from the fourth non-annotated scanner domain even if we don’t have annotations for it. Second, for training the detector network, rather than using centroid-based fixed-size bounding boxes, we create mitosis-specific bounding boxes. We do this by manually anno...
Management Science, 2014
In order to study the theoretical and methodological foundations of state regulation of interregi... more In order to study the theoretical and methodological foundations of state regulation of interregional integration of regional development in today's globalized economy, the analysis of management thought genesis to implement deep transformational changes in public administration of the region. The study author found that in any major scientific approach to understanding the process of integration is the development of links between different regions, combining them together, and the fact that sustainable regional development is an objective and manageable process the main role in which the state should play.
JOURNAL OF ADVANCES IN CHEMISTRY, 2014
By X-ray diffraction, differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) w... more By X-ray diffraction, differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) were investigated BaFe12-xAlxO19 hexaferrites with various concentrations of Al (x = 0.3, 0.9 and 1.2). Crystal structure of compounds was determined, and it determined that under normal condition (P = 0 GPa, T = 300 K) they possess structure is hexagonal symmetry with the space group P63/mmc. Replacing Fe3+ ions Al3+ with ions, on account of reducing ion radius, decrease of indices of parameters was occurred. This crystal structure is saved in a temperature range 30 - 950 ºC and structural phase transition do not occur. Energy supplied to a system is fully swallowed by a system, monotonic decrease is occurred in TGA curve and in DTA curve endo and exo effects do not occur.
Journal of Alloys and Compounds, 2017
The polycrystalline samples of the new ferroelectric ceramics ሺ1 − ݎܵሻݔ ଷ.ଷହ ܽܤ ଵ.ହ ܾܰ ଵ ܱ ... more The polycrystalline samples of the new ferroelectric ceramics ሺ1 − ݎܵሻݔ ଷ.ଷହ ܽܤ ଵ.ହ ܾܰ ଵ ܱ ଷ (SBN)-ሺݔሻܽܤ ସ ܰܽ ଶ ܾܰ ଵ ܱ ଷ (BNN) with potassium tungsten bronze structure were prepared using a high-temperature solid-state reaction technique. They are novel inorganic materials with potassium tungsten bronze structural type. The formation of the ceramics under the reported conditions has been confirmed by an X-ray diffraction technique. The ceramic microstructures were observed using scanning electron microscopy (SEM) techniques associated with energy dispersive X-ray spectroscopy (EDX) analysis. The SEM micrograph exhibits grain boundary distribution. Dielectric properties of the SBN-NBN compounds as a function of temperature (300-850 K) at frequencies 1-1000 KHz were studied. Detailed studies of variation of dielectric parameters with temperature and frequency confirmed the existence of ferroelectricity in these materials. The difference between the highfrequency dielectric constants and the low-frequency dielectric constants indicates that the ferroelectric phase transition in SBN-NBN compounds is of rather diffuse nature than relaxor type. According to the experimental data, it is suggested that ferroelectrics phase transition is a first-order transition.
Journal of Alloys and Compounds, 2015
Polyactive ® membranes show promising properties for CO 2 separation from flue gas. An investigat... more Polyactive ® membranes show promising properties for CO 2 separation from flue gas. An investigation of different module types using Polyactive ® membranes was carried out for this paper. A test rig was built to explore, amongst other process parameters, the pressure drop in envelope-type membrane modules. The experimental data and simulation results were compared with quite good consistency. This validation enabled further simulations for different modules in a virtual pilot plant configuration. Applying the data from the pilot plant simulation to a reference power plant, the scaled-up cascaded membrane system was analyzed using different membrane modules. Considering the required membrane area, energy consumption and pressure drop in different modules, a counter-current membrane module configuration exhibited the best performance and had a marginal advantage in comparison with the chemical absorption process.
Zeitschrift für Kristallographie - Crystalline Materials, 2014
The crystal structure of complex oxide ferroelectrics Ba
Journal of Crystallographic and Spectroscopic Research, 1990
Monoclinic (N2H6)3Zr2F13·F crystallizes in space group P21-C22 (No. 4) with unit cell dimensionsa... more Monoclinic (N2H6)3Zr2F13·F crystallizes in space group P21-C22 (No. 4) with unit cell dimensionsa=5.670(1),b=10.984(2),c=10.601(2) Å,ß=93.88(1)°,V=658.7(4) Å3 andZ=2. Two different types of N2H62+ ions are present. One is involved in strong H-bonds to F- ions in infinite chains running along the a axis (the shortest N-F distance is 2.437(5) Å), and the other links the structure through weaker bi- and trifurcated H-bonds to fluorine ligands of the Zr2F135- ions. The N-N bond lengths range from 1.430(5) to 1.446(5) Å with apparently no meaningful correlation to the type of N2H22+ ions. The Zr2F135- ions have very nearly C2 point symmetry and are formed by joining two distorted bicapped trigonal prisms of ZrF8-units through a common face. Distances of Zr-F terminal bonds range from 2.015(2) to 2.112(2) Å and of bridging bonds from 2.133(2) to 2.212(2) Å. (N2H6)3Hf2F13·F is isomorphous. The vibrational spectra of the two compounds are nearly identical, with the exception of a strong infrared band, which is assigned to a stretching mode with the moving central atom within the anion. The anion part of the spectrum is simple, showing broad unresolved bands. The cation part shows two types of N2H6– ions. H-Bonding is strongly present in the spectra, but no simple correlations with the H-bond strength is evident.