The Experts below are selected from a list of 153 Experts worldwide ranked by ideXlab platform
Subrata Mukhopadhyay - One of the best experts on this subject based on the ideXlab platform.
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a Successive Layer by Layer assembly of supramolecular frameworks driven by a novel type of face to face π π interactions
CrystEngComm, 2013Co-Authors: Prankrishna Manna, Saikat Kumar Seth, Monojit Mitra, Jiten N Singh, Somnath Ray Choudhury, Subrata MukhopadhyayAbstract:The solid-state complex [PTPH3](NO3)3·2(HNO3) (1) has been synthesized and characterized by X-ray studies, where PTPH3 is the triply protonated form of 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine (PTP). The solid-state structure of the complex reveals that the π+–π+ interactions are the major driving force in the crystal packing while π+–π, π–π and π–anion interactions assist the overall stabilization of self-assembly. Complex 1 exhibits two different π-stack Layers, where Layer 1 is generated through π+–π+ interactions and the mutual forces of π+–π+ and π+–π form Layer 2. The interaction energies of the main driving forces (π+–π+, π+–π and π–anion interactions) observed in the crystal structure have been calculated using dispersion-corrected density functional theory (DFT-D). An analysis of the Hirshfeld surface of complex 1 shows the intermolecular interactions involved within the crystal structure and corresponding quantitative information are presented by fingerprint plots.
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A Successive Layer-by-Layer assembly of supramolecular frameworks driven by a novel type of face-to-face π+–π+ interactions
CrystEngComm, 2013Co-Authors: Prankrishna Manna, Saikat Kumar Seth, Monojit Mitra, Somnath Ray Choudhury, N. Jiten Singh, Subrata MukhopadhyayAbstract:The solid-state complex [PTPH3](NO3)3·2(HNO3) (1) has been synthesized and characterized by X-ray studies, where PTPH3 is the triply protonated form of 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine (PTP). The solid-state structure of the complex reveals that the π+–π+ interactions are the major driving force in the crystal packing while π+–π, π–π and π–anion interactions assist the overall stabilization of self-assembly. Complex 1 exhibits two different π-stack Layers, where Layer 1 is generated through π+–π+ interactions and the mutual forces of π+–π+ and π+–π form Layer 2. The interaction energies of the main driving forces (π+–π+, π+–π and π–anion interactions) observed in the crystal structure have been calculated using dispersion-corrected density functional theory (DFT-D). An analysis of the Hirshfeld surface of complex 1 shows the intermolecular interactions involved within the crystal structure and corresponding quantitative information are presented by fingerprint plots.
Jieh-shian Young - One of the best experts on this subject based on the ideXlab platform.
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The best optimal Hankel-norm approximation of railway active wheelset models
Proceedings of the 2010 American Control Conference, 2010Co-Authors: Jieh-shian YoungAbstract:This paper presents an application of the model reduction for the wheelset of the railway vehicle from the best optimal Hankel-norm approximation. It is necessary to reduce the complexity of the control synthesis by model reduction techniques since the wheelset model is highly interactive with high order. The proposed approach solves the best optimal solution Layer by Layer from any optimal solution of each Layer. This approach adopts the left inverses of inner function vectors characterized from the Schmidt pair. The McMillan degree of the reduced-order model for the Successive Layer can be determined. Fuerthermore, this Successive Layer will also become another approximation problem. This paper also proposes an algorithm to calculate the best optimal approximation recursively. The best optimal Hankel-norm approximation will be compared with the other optimal Hankel-norm approximation in frequency domain for the transfer function matrix and all its arrays. The results reveal that the best optimal Hankel-norm approximation is better in sense of the singular values not only in all Layers but in all arrays.
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The best optimal Hankel-norm approximation of railway active wheelset models
Proceedings of the 2010 American Control Conference, 2010Co-Authors: Jieh-shian YoungAbstract:This paper presents an application of the model reduction for the wheelset of the railway vehicle from the best optimal Hankel-norm approximation. It is necessary to reduce the complexity of the control synthesis by model reduction techniques since the wheelset model is highly interactive with high order. The proposed approach solves the best optimal solution Layer by Layer from any optimal solution of each Layer. This approach adopts the left inverses of inner function vectors characterized from the Schmidt pair. The McMillan degree of the reduced-order model for the Successive Layer can be determined. Furthermore, this Successive Layer will also become another approximation problem. This paper also proposes an algorithm to calculate the best optimal approximation recursively. The best optimal Hankel-norm approximation will be compared with the other optimal Hankel-norm approximation in frequency domain for the transfer function matrix and all its arrays. The results reveal that the best optimal Hankel-norm approximation is better in sense of the singular values not only in all Layers but in all arrays.
Marcel A. J. Somers - One of the best experts on this subject based on the ideXlab platform.
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on the determination of stress profiles in expanded austenite by grazing incidence x ray diffraction and Successive Layer removal
Acta Materialia, 2015Co-Authors: Frederico Augusto Pires Fernandes, Thomas Lundin Christiansen, Grethe Winther, Marcel A. J. SomersAbstract:Abstract Surface Layers of expanded austenite resulting from nitriding typically exhibit large gradients in residual stress and composition. Evaluation of residual-stress profiles is explored by means of grazing incidence X-ray diffraction (GI-XRD), probing shallow depths, combined with Successive Layer removal. Several factors complicating the stress determination are analysed and discussed: (1) ghost stresses arising from a small variation in the shallow information depths probed with GI-XRD, (2) selection of the grain interaction model used to calculate the X-ray elastic constants for conversion of lattice strains into residual stress and (3) the composition dependence of these elastic constants.
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determination of stress profiles in expanded austenite by combining Successive Layer removal and gi xrd
Advanced Materials Research, 2014Co-Authors: Frederico Augusto Pires Fernandes, Thomas Lundin Christiansen, Marcel A. J. SomersAbstract:The present work deals with the evaluation of the residual-stress profile in expanded- austenite by Successive removal steps using GI-XRD. Preliminary results indicate stresses of several GPa's from 111 and 200 diffraction lines. These stresses appear largest for the 200 reflection. The strain-free lattice parameter decayed smoothly with depth, while for the compressive stress a maximum value is observed at some depth below the surface. Additionally a good agreement was found between the nitrogen profile determined with GDOES analysis and the strain-free lattice parameter from XRD.
Dongyuan Zhao - One of the best experts on this subject based on the ideXlab platform.
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Successive Layer by Layer strategy for multi shell epitaxial growth shell thickness and doping position dependence in upconverting optical properties
Chemistry of Materials, 2013Co-Authors: Xiaomin Li, Dengke Shen, Jianping Yang, Fan Zhang, Dongyuan ZhaoAbstract:One pot Successive Layer-by-Layer (SLBL) strategy is introduced to fabricate the core/shell upconversion nanoparticles (NPs) for the first time by using high boiling-point Re-OA (rare-earth chlorides dissolved in oleic acid at 140 °C) and Na-TFA-OA (sodium trifluoroacetate dissolved in oleic acid at room temperature) as shell precursor solutions. This protocol is flexible to deposit uniform multishell on both hexagonal (β) and cubic (α) phase cores by Successive introducing of the shell precursor solutions. Shell thickness of the obtained NPs with narrow size distribution (σ < 10%) can be well controlled from 1 monoLayer (∼0.36 nm) to more than 20 monoLayers (∼8 nm) by simply tuning the amounts of the shell precursors. Furthermore, the tunable doping positions (core doping and shell doping) can also be achieved by adjusting the species and addition sequence of the shell precursors. As a result of the high quality uniform shell and advanced core/shell structures, the optical properties of the obtained core...
Prankrishna Manna - One of the best experts on this subject based on the ideXlab platform.
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a Successive Layer by Layer assembly of supramolecular frameworks driven by a novel type of face to face π π interactions
CrystEngComm, 2013Co-Authors: Prankrishna Manna, Saikat Kumar Seth, Monojit Mitra, Jiten N Singh, Somnath Ray Choudhury, Subrata MukhopadhyayAbstract:The solid-state complex [PTPH3](NO3)3·2(HNO3) (1) has been synthesized and characterized by X-ray studies, where PTPH3 is the triply protonated form of 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine (PTP). The solid-state structure of the complex reveals that the π+–π+ interactions are the major driving force in the crystal packing while π+–π, π–π and π–anion interactions assist the overall stabilization of self-assembly. Complex 1 exhibits two different π-stack Layers, where Layer 1 is generated through π+–π+ interactions and the mutual forces of π+–π+ and π+–π form Layer 2. The interaction energies of the main driving forces (π+–π+, π+–π and π–anion interactions) observed in the crystal structure have been calculated using dispersion-corrected density functional theory (DFT-D). An analysis of the Hirshfeld surface of complex 1 shows the intermolecular interactions involved within the crystal structure and corresponding quantitative information are presented by fingerprint plots.
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A Successive Layer-by-Layer assembly of supramolecular frameworks driven by a novel type of face-to-face π+–π+ interactions
CrystEngComm, 2013Co-Authors: Prankrishna Manna, Saikat Kumar Seth, Monojit Mitra, Somnath Ray Choudhury, N. Jiten Singh, Subrata MukhopadhyayAbstract:The solid-state complex [PTPH3](NO3)3·2(HNO3) (1) has been synthesized and characterized by X-ray studies, where PTPH3 is the triply protonated form of 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine (PTP). The solid-state structure of the complex reveals that the π+–π+ interactions are the major driving force in the crystal packing while π+–π, π–π and π–anion interactions assist the overall stabilization of self-assembly. Complex 1 exhibits two different π-stack Layers, where Layer 1 is generated through π+–π+ interactions and the mutual forces of π+–π+ and π+–π form Layer 2. The interaction energies of the main driving forces (π+–π+, π+–π and π–anion interactions) observed in the crystal structure have been calculated using dispersion-corrected density functional theory (DFT-D). An analysis of the Hirshfeld surface of complex 1 shows the intermolecular interactions involved within the crystal structure and corresponding quantitative information are presented by fingerprint plots.
