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Journal articles on the topic 'Density distortion'

Author: Grafiati

Published: 14 March 2023

Last updated: 19 July 2025

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1

Wang, Q. C., Xiao Dong Hu, W. Li, and Ju Long Yuan. "Numerical Simulation of Machining Distortion of Residually Stressed Aircraft Aluminum Components." Key Engineering Materials 315-316 (July 2006): 235–38. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.235.

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The presence of residual stress in aircraft aluminum components can give rise to distortion after machining. Excessive distortion may result in the rejection of a part or the need for costly and time-consuming rework prior to placement in service. The purpose of this research was to develop a methodology for the prediction of machining-induced distortions of residually stressed aircraft aluminum components. Numerical simulation results show that the magnitude of machining distortion is strongly related to the square root of Stain Energy Density W or Stress Range σ . The experimental results de

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2

Kang, Suji, and Jaemin Lee. "An Experimental Study on Welding Distortion in High-Density Polyethylene (HDPE) Welded Structures." Journal of Welding and Joining 41, no. 4 (2023): 238–43. http://dx.doi.org/10.5781/jwj.2023.41.4.2.

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High-density polyethylene (HDPE) is increasingly recognized as an eco-friendly material for small crafts. However, there is limited research on welding distortion in HDPE welded structures. This study investigates the deformation behavior of HDPE fillet-welded specimens, focusing on global out-of-plane distortions such as angular and bowing distortions. Experimental analysis, conducted using an optical 3D scanner, reveals similarities between the observed deformation patterns in HDPE fillet-welded specimens and those commonly found in other fillet-welded structures. Angular and bowing distorti

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Harvey, Pierre D., and Christian Reber. "Article." Canadian Journal of Chemistry 77, no. 1 (1999): 16–23. http://dx.doi.org/10.1139/v98-212.

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Density functional theory is used to characterize the lowest energy excited spin triplet orbital configurations of square-planar halide complexes of palladium(II). Calculations for the eg –> b1g orbital excitation (D4h labels) predict a non-totally symmetric distortion along the b1g normal coordinate, leading to unequal bond lengths for perpendicular metal-ligand bonds (D2h symmetry). Calculated bond length changes are 0.15 Å (0.11 Å) and 0.05 Å (0.00 Å) for PdCl42- (PdBr42-). These values compare favorably to the emitting-state distortions of 0.12 Å and 0.09 Å for K2PdCl4 (0.12 Å, and 0.07

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4

Wang, Kan, and Meng Wang. "Aero-optics of subsonic turbulent boundary layers." Journal of Fluid Mechanics 696 (February 24, 2012): 122–51. http://dx.doi.org/10.1017/jfm.2012.11.

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AbstractCompressible large-eddy simulations are carried out to study the aero-optical distortions caused by Mach 0.5 flat-plate turbulent boundary layers at Reynolds numbers of ${\mathit{Re}}_{\theta } = 875$, 1770 and 3550, based on momentum thickness. The fluctuations of refractive index are calculated from the density field, and wavefront distortions of an optical beam traversing the boundary layer are computed based on geometric optics. The effects of aperture size, small-scale turbulence, different flow regions and beam elevation angle are examined and the underlying flow physics is analy

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Luty, Tadeusz, and John C. Raich. "Molecular to atomic transformation in solid iodine under high pressure." Canadian Journal of Chemistry 66, no. 4 (1988): 812–18. http://dx.doi.org/10.1139/v88-141.

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Structural transformations in solid iodine under high pressure are analyzed from the point of view of symmetries of possible charge density distortions coupled to phonons. The transition from the high pressure atomic phase to the low pressure molecular phase is interpreted in terms of phonon softening and formation of molecular bonds and is seen as a condensation of a charge density distortion wave coupled to a phonon mode.

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6

Park, Sang-Cheol, Hee-Seon Bang, and Woo-Jae Seong. "Effects of Material Properties on Angular Distortion in Wire Arc Additive Manufacturing: Experimental and Computational Analyses." Materials 13, no. 6 (2020): 1399. http://dx.doi.org/10.3390/ma13061399.

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In wire arc additive manufacturing (AM), as in arc welding, arc heat thermally deforms substrates and articles. For industrial applications, deformation characteristics of various materials must be understood and appropriate materials and methods of reducing deformation must be devised. Therefore, angular distortions of different materials were investigated through bead-on-plate welding and finite element analysis. A model that simplifies temperature-dependent properties was developed to establish relationships between thermomechanical properties and angular distortion. A simplified model of t

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Hussein, Rageh K., Ibrahim I. Bashter, Mohamed El-Okr, and Medhat Ahmed Ibrahim. "DFT Investigation of Structural and Electronic Properties of Modified PZT." Acta Chemica Iasi 27, no. 1 (2019): 15–30. http://dx.doi.org/10.2478/achi-2019-0002.

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Abstract Density of states and geometrical structures of modified Lead zirconate titanate are investigated using density functional theory within local density approximation. The electronic properties and bond length variation have been studied in terms of electronic structure and bonding mechanism principles respectively. Hybridization between Ti 3d - O 2p states and ferroelectric distortion have been addressed as a theoretical approach, to rule the improvement of ferroelectric properties of Lead zirconate titanate. The analysis of Ga, Tl modified Lead zirconate titanate were found to diminis

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8

Birkinshaw, Mark, Josie Rawes, and Diana Worrall. "Extreme jet distortions in low-z radio galaxies." Proceedings of the International Astronomical Union 14, A30 (2018): 61–65. http://dx.doi.org/10.1017/s1743921319003466.

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AbstractJets often display bends and knots at which the flows change character. Extreme distortions have implications for the nature of jet flows and their interactions. We present the results of three radio mapping campaigns. The distortion of 3CRR radio galaxy NGC 7385 is caused by a collision with a foreground magnetised gas cloud which causes Faraday rotation and free-free absorption, and is triggered into star formation. For NGC 6109 the distortion is more extreme, creating a ring-shaped structure, but no deflector can be identified in cold or hot gas. Similar distortions in NGC 7016 are

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9

Kaczmarek, Michał, and Ernest Stano. "Magnetic Flux Density under Single Harmonic Distortion." Materials Science Forum 1034 (June 15, 2021): 151–57. http://dx.doi.org/10.4028/www.scientific.net/msf.1034.151.

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In the paper the change of the magnetic flux density under single harmonic distortion is discussed. Presented results show the dependence of the value of the magnetic flux density in the toroidal magnetic core made from the Ni80Fe20 tape of the phase angle of higher harmonic in relation to the main harmonic of distorted magnetizing current. Moreover, the influence of higher harmonic depends from it frequency and it becomes undetectable above 15th higher harmonic, even if its level reaches 50% of the RMS value of the main harmonic of distorted magnetizing current. Laboratory tests were carried

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10

Bakhtiyarov, Sayavur I. "Numerical Simulations and Experimental Study of Liquid Metal Flow Around Sand Core." Journal of Fluids Engineering 128, no. 3 (2005): 541–47. http://dx.doi.org/10.1115/1.2175160.

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This paper presents the results of experimental and numerical studies of the hot distortion phenomenon in the phenolic urethane cold box systems used in metal casting. Dual Pushrod Dilatometry has been used to measure a thermal expansion/contraction of phenolic urethane cold box sand core specimens at temperatures ranging from 20°C to 600°C. High temperature tensile tests showed that the tensile strength of the phenolic urethane cold box sand cores is significantly affected by the bench life, temperature and binders level. High temperature hot distortion furnace tests on cylindrical cores show

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11

Gao, Zhiyuan, Ziying Jia, and Yu Hao. "Regional Disparities, Spatial Effects, and the Dynamic Evolution of Distorted Energy Prices in China." Energies 18, no. 13 (2025): 3465. https://doi.org/10.3390/en18133465.

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The distortion of energy prices has become an important obstacle to the high-quality development of China’s economy. Moreover, energy price distortions are not merely a domestic issue. They may trigger carbon leakage by diverting emissions-intensive production to countries with cheaper energy. Although the existing literature has extensively examined the effects of energy price distortions, two significant research gaps remain. First, most studies treat energy price distortions merely as an influencing factor, lacking a systematic analysis that places it at the core. Second, the spatial correl

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Uejima, Motoyuki, Tohru Sato, Daisuke Yokoyama, Kazuyoshi Tanaka, and Jong-Wook Park. "Quantum yield in blue-emitting anthracene derivatives: vibronic coupling density and transition dipole moment density." Phys. Chem. Chem. Phys. 16, no. 27 (2014): 14244–56. http://dx.doi.org/10.1039/c4cp01428f.

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13

Bak, Peter, Matthias Schaefer, Andreas Stoffel, Daniel A. Keim, and Itzhak Omer. "Density Equalizing Distortion of Large Geographic Point Sets." Cartography and Geographic Information Science 36, no. 3 (2009): 237–50. http://dx.doi.org/10.1559/152304009788988288.

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14

Huan, S. L., and A. R. Pater. "Analysis and prediction of geophone performance parameters." GEOPHYSICS 50, no. 8 (1985): 1221–28. http://dx.doi.org/10.1190/1.1441994.

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In the past, designers relied greatly on simplified geophone models to describe the physical quantities of a geophone. Several iterations of fine tuning the geophone variables were required to achieve a desired geophone characteristic. Although many geophone prototypes were built before a geophone design was finalized, it was still impossible to assure an optimum geophone design. An easier, faster, and more accurate method of predicting geophone parameters is described and the method of computer‐aided geophone design is outlined. A description of a nonlinear geophone model is presented and a n

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15

Li, Y. Q., and X. L. Gao. "Constitutive Equations for Hyperelastic Materials Based on the Upper Triangular Decomposition of the Deformation Gradient." Mathematics and Mechanics of Solids 24, no. 6 (2018): 1785–99. http://dx.doi.org/10.1177/1081286518806950.

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The upper triangular decomposition has recently been proposed to multiplicatively decompose the deformation gradient tensor into a product of a rotation tensor and an upper triangular tensor called the distortion tensor, whose six components can be directly related to pure stretch and simple shear deformations, which are physically measurable. In the current paper, constitutive equations for hyperelastic materials are derived using strain energy density functions in terms of the distortion tensor, which satisfy the principle of material frame indifference and the first and second laws of therm

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16

Beene, Daniel, Su Zhang, Christopher D. Lippitt, and Susan M. Bogus. "Performance Evaluation of Multiple Pan-Sharpening Techniques on NDVI: A Statistical Framework." Geographies 2, no. 3 (2022): 435–52. http://dx.doi.org/10.3390/geographies2030027.

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Pan-sharpening is a pixel-level image fusion process whereby a lower-spatial-resolution multispectral image is merged with a higher-spatial-resolution panchromatic one. One of the drawbacks of this process is that it may introduce spectral or radiometric distortion. The degree to which distortion is introduced is dependent on the imaging sensor, the pan-sharpening algorithm employed, and the context of the scene analyzed. Studies that evaluate the quality of pan-sharpening algorithms often fail to account for changes in geographic context and are agnostic to any specific applications of an end

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17

Li, Chunlian, Guihua Bai, Shiaoman Chao, and Zhonghua Wang. "A High-Density SNP and SSR Consensus Map Reveals Segregation Distortion Regions in Wheat." BioMed Research International 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/830618.

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Segregation distortion is a widespread phenomenon in plant and animal genomes and significantly affects linkage map construction and identification of quantitative trait loci (QTLs). To study segregation distortion in wheat, a high-density consensus map was constructed using single nucleotide polymorphism (SNP) and simple sequence repeat (SSR) markers by merging two genetic maps developed from two recombinant-inbred line (RIL) populations, Ning7840 × Clark and Heyne × Lakin. Chromosome regions with obvious segregation distortion were identified in the map. A total of 3541 SNPs and 145 SSRs wer

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18

Tang, Fu Ling, F. C. Wan, X. Q. Dai, and W. J. Lu. "Atomic Simulation for Lattice Structure of La/SrMnO₃ Superlattice." Materials Science Forum 689 (June 2011): 49–57. http://dx.doi.org/10.4028/www.scientific.net/msf.689.49.

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We studied in detail the lattice transition and local lattice structure (including Jahn-Teller distortion) in LaMnO3/SrMnO3surperlattices by classical atomistic simulation. For a certain doping density, it is found that the superlattices with short modulation period have small lattice energies and larger differences among lattice parametersa,b/√2 andc. The average La-Mn (Mn3+-O) distance is larger than the average Sr-Mn (Mn4+-O) distance for all doping densities and superlattice configurations at certain doping density. The standard deviation of Mn-O bond lengths and Jahn-Teller distortion of

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19

Darcie, T. E., R. M. Jopson, and R. W. Tkach. "Intermodulation distortion in optical amplifiers from carrier-density modulation." Electronics Letters 23, no. 25 (1987): 1392. http://dx.doi.org/10.1049/el:19870961.

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20

Jingxian Wu and Ning Sun. "Optimum Sensor Density in Distortion-Tolerant Wireless Sensor Networks." IEEE Transactions on Wireless Communications 11, no. 6 (2012): 2056–64. http://dx.doi.org/10.1109/twc.2012.041612.110127.

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21

Nieznański, J. "Analytical establishment of the minimum-distortion pulse density modulation." Electrical Engineering 80, no. 4 (1997): 251–58. http://dx.doi.org/10.1007/bf01232797.

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22

Pohl, Anna, Heiko Meider, and Michael Springborg. "On the Peierls' distortion and the local-density approximation." Journal of Molecular Structure: THEOCHEM 305 (March 1994): 165–73. http://dx.doi.org/10.1016/0166-1280(94)80151-7.

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23

Smith, Niamh, Magdalena Weger, Gregor Pobegen, and Alexander L. Shluger. "P-Type Impurities in 4H-SiC Calculated Using Density Functional Theory." Defect and Diffusion Forum 426 (June 6, 2023): 35–42. http://dx.doi.org/10.4028/p-3d9axo.

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We have investigated the p-dopant potential of 14 different impurities (Be, B, F, Mg, Al,Ca, Sc, Cu, Zn, Ga, In, Ba, Pt, and Tl) within 4H-SiC via Density Functional Theory (DFT) calcu-lations using a hybrid density functional. We analyse the incorporation energies of impurity atomson Si and C sites as well as the character of lattice distortion induced by impurities. The calculatedthermal ionization energies confirm that Al and Ga on the Si site are the best candidates for p-dopingof 4H-SiC. Although we find some correlation of incorporation energies with atomic radii of impuri-ties, the diff

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24

Zhang, Duan, Yecun Wu, Yu-Hsin Su, et al. "Charge density waves and degenerate modes in exfoliated monolayer 2H-TaS2." IUCrJ 7, no. 5 (2020): 913–19. http://dx.doi.org/10.1107/s2052252520011021.

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Charge density waves spontaneously breaking lattice symmetry through periodic lattice distortion, and electron–electron and electron–phonon interactions, can lead to a new type of electronic band structure. Bulk 2H-TaS2 is an archetypal transition metal dichalcogenide supporting charge density waves with a phase transition at 75 K. Here, it is shown that charge density waves can exist in exfoliated monolayer 2H-TaS2 and the transition temperature can reach 140 K, which is much higher than that in the bulk. The degenerate breathing and wiggle modes of 2H-TaS2 originating from the periodic latti

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25

Isbister, D. J., and D. H. Chaplin. "The Influence of the Skin Effect on the Amplitude of Single Pulse Gamma Detected NMR on Oriented Nuclei Signals." Zeitschrift für Naturforschung A 45, no. 1 (1990): 43–49. http://dx.doi.org/10.1515/zna-1990-0109.

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AbstractThe effects of skin depth on gamma detected single pulse Nuclear Magnetic Resonance on Oriented Nuclei (NMRON) signals are theoretically explored for narrow, intermediate and broad line metallic samples, using the density matrix approach describing a pure Zeeman system. It is shown that the skin effect distortion of the signal can dominate over intermediate to broadline distortions for that range of experimental conditions generally applicable to ferromagnetic hosts. In particular, the skin effect distortions of the first maximum, obtained when the excitation pulse width is lengthened,

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26

Kawasaki, Masahiro, and Katsuhiko Sato. "Distortion of Microwave Background Radiation by Decaying Particles." Publications of the Astronomical Society of Japan 39, no. 5 (1987): 837–42. https://doi.org/10.1093/pasj/39.5.837.

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Abstract The effect of the radiative decay of weakly interacting massive particles (WIMPs) on the spectrum of microwave background radiation (MBR) is investigated. It is concluded that WIMPs with an appropriate mass, lifetime, and number density (τ1/2 m ~ 2 × 107 s1/2 eV, 1012 ≤ τ ≤ 1014 s, number density ≃1/10-1/20nτ) can account for the recently observed distortion of the MBR spectrum. However, such radiative coupling of WIMPs is stringently constrained from the consideration of the stellar cooling.

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27

Coelho-Silva, Fernanda, Luciano Augusto Cano Martins, Daniela Azeredo Braga, Eliana Zandonade, Francisco Haiter-Neto, and Sergio Lins de-Azevedo-Vaz. "Influence of windowing and metal artefact reduction algorithms on the volumetric dimensions of five different high-density materials: a cone-beam CT study." Dentomaxillofacial Radiology 49, no. 8 (2020): 20200039. http://dx.doi.org/10.1259/dmfr.20200039.

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Objective: To assess the influence of windowing and metal artefact reduction (MAR) algorithms on the volumetric dimensions of high-density materials using two CBCT systems. Methods: Four cylinders of amalgam, cobalt-chromium, gutta-percha, titanium and zirconium, were manufactured and their physical volumes (PV) were measured. A polymethyl methacrylate phantom containing the cylinders was submitted to CBCT acquisitions with Picasso Trio and OP300 units with their MAR enabled and disabled. The tomographic volume (TV) of all the cylinders was obtained by semi-automatic segmentation using two win

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28

Ignatjev V. K., Lebedev N. G., and Stankevich D. A. "The effect of the spin polarization control of conduction electrons through the deformation of a ferromagnet." Technical Physics Letters 48, no. 12 (2022): 25. http://dx.doi.org/10.21883/tpl.2022.12.54941.19363.

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A model of the exchange interaction of collectivized conduction electrons with magnetization electrons in a deformed ferromagnet with taking into account spin-orbit corrections is proposed. Under the conditions of inhomogeneous torsion distortion, the conduction electron spin in the domain is oriented along the exchange interaction vector. If the conduction current density vector is orthogonal to the torsion axis, then the average conduction electron spin will be oriented predominantly along the current density vector. Keywords: spin-orbit interaction, transition metals, Wannier functions, tor

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29

Jung, Haeyoon, Jiyeon Kim, and Sooran Kim. "Phonon study of Jahn–Teller distortion and phase stability in NaMnO₂ for sodium-ion batteries." Journal of Applied Physics 132, no. 5 (2022): 055101. http://dx.doi.org/10.1063/5.0086903.

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Cathode materials undergo various phase transitions during the charge/discharge process, and the structural transitions significantly affect the battery performance. Although phonon properties can provide a direct clue for structural stability and transitions, it has been less explored in sodium cathode materials. Here, using the first-principles calculations, we investigate phonon and electronic properties of various layered NaMnO2 materials, especially focusing on the dependency of the Jahn–Teller distortion of Mn3+. The phonon dispersion curves show that the O′3 and P′2 structures with the

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Min, Taewon, Wooseon Choi, Jinsol Seo, et al. "Cooperative evolution of polar distortion and nonpolar rotation of oxygen octahedra in oxide heterostructures." Science Advances 7, no. 17 (2021): eabe9053. http://dx.doi.org/10.1126/sciadv.abe9053.

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Polarity discontinuity across LaAlO3/SrTiO3 (LAO/STO) heterostructures induces electronic reconstruction involving the formation of two-dimensional electron gas (2DEG) and structural distortions characterized by antiferrodistortive (AFD) rotation and ferroelectric (FE) distortion. We show that AFD and FE modes are cooperatively coupled in LAO/STO (111) heterostructures; they coexist below the critical thickness (tc) and disappear simultaneously above tc with the formation of 2DEG. Electron energy-loss spectroscopy and density functional theory (DFT) calculations provide direct evidence of oxyg

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31

Zlatar, Matija, Carl-Wilhelm Schläpfer, Emmanuel Penka Fowe, and Claude A. Daul. "Density functional theory study of the Jahn-Teller effect in cobaltocene." Pure and Applied Chemistry 81, no. 8 (2009): 1397–411. http://dx.doi.org/10.1351/pac-con-08-06-04.

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A detailed discussion of the potential energy surface of bis(cyclopentadienyl)cobalt(II), cobaltocene, is given. Vibronic coupling coefficients are calculated using density functional theory (DFT). Results are in good agreement with experimental findings. On the basis of our calculation there is no second-order Jahn–Teller (JT) effect as predicted by group theory. The JT distortion can be expressed as a linear combination of all totally symmetric normal modes of the low-symmetry, minimum-energy conformation. The out-of-plane ring deformation is the most important mode. The JT distortion is ana

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32

Leinhos, Dirk C., Norbert R. Schmid, and Leonhard Fottner. "The Influence of Transient Inlet Distortions on the Instability Inception of a Low-Pressure Compressor in a Turbofan Engine." Journal of Turbomachinery 123, no. 1 (2000): 1–8. http://dx.doi.org/10.1115/1.1330271.

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While studies on compressor flow instabilities under the presence of inlet distortions have been carried out with steady distortions in the past, the investigation presented here focuses on the influence of transient inlet distortions as generated by variable geometry engine intakes of super- and hypersonic aircraft on the characteristic and the nature of the instability inception of a LPC. The flow patterns (total pressure distortion with a superimposed co- or counterrotating swirl) of the distortions are adopted from a hypersonic concept aircraft. A LARZAC 04 twin-spool turbofan was operated

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Tang, Jingfan, Meijia Zhou, Pengfei Li, Min Zhang, and Ming Jiang. "Crowd Counting Based on Multiresolution Density Map and Parallel Dilated Convolution." Scientific Programming 2021 (January 20, 2021): 1–10. http://dx.doi.org/10.1155/2021/8831458.

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The current crowd counting tasks rely on a fully convolutional network to generate a density map that can achieve good performance. However, due to the crowd occlusion and perspective distortion in the image, the directly generated density map usually neglects the scale information and spatial contact information. To solve it, we proposed MDPDNet (Multiresolution Density maps and Parallel Dilated convolutions’ Network) to reduce the influence of occlusion and distortion on crowd estimation. This network is composed of two modules: (1) the parallel dilated convolution module (PDM) that combines

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San, Saro, Sahib Hasan, Puja Adhikari, and Wai-Yim Ching. "Designing Quaternary and Quinary Refractory-Based High-Entropy Alloys: Statistical Analysis of Their Lattice Distortion, Mechanical, and Thermal Properties." Metals 13, no. 12 (2023): 1953. http://dx.doi.org/10.3390/met13121953.

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The rapid evolution in materials science has resulted in a significant interest in high-entropy alloys (HEAs) for their unique properties. This study focuses on understanding both quaternary and quinary body-centered cubic (BCC) of 12 refractory-based HEAs, and on analysis of their electronic structures, lattice distortions, mechanical, and thermal properties. A comprehensive assessment is undertaken by means of density functional theory (DFT)-based first principles calculations. It is well known that multiple constituents lead to notable lattice distortions, especially in quinary HEAs. This d

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Schoenberg, Sam E., David J. Green, Albert E. Segall, Gary L. Messing, Abraham S. Grader, and Phillip M. Halleck. "Stresses and Distortion Due to Green Density Gradients During Densification." Journal of the American Ceramic Society 89, no. 10 (2006): 3027–33. http://dx.doi.org/10.1111/j.1551-2916.2006.01182.x.

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Kalika, Douglass S., and Morton M. Denn. "Wall Slip and Extrudate Distortion in Linear Low‐Density Polyethylene." Journal of Rheology 31, no. 8 (1987): 815–34. http://dx.doi.org/10.1122/1.549942.

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Kooi, Derk P., and Paola Gori-Giorgi. "A Variational Approach to London Dispersion Interactions without Density Distortion." Journal of Physical Chemistry Letters 10, no. 7 (2019): 1537–41. http://dx.doi.org/10.1021/acs.jpclett.9b00469.

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V., Geetha, and Sivachidambaranathan V. "An AC-AC high frequency pulse density modulated full bridge series resonant converter for induction heating application." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 4 (2019): 2238–46. https://doi.org/10.11591/ijece.v9i4.pp2238-2246.

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This paper deals with a new AC-AC single stage full bridge series resonant converter for induction heating application. The proposed system is simulated with high power density modulation technique to produce an output power of 1.8Kw. The main feature of the proposed converter is to reduce the total harmonic distortion produced in the output current for the switching frequency of 29Khz.Asymmetrical pulse density modulation technique is proposed to achieve maximum output power with less harmonic content. It is found that the THD of the proposed high-power density modulated converter is 13.43%.

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Yoshinaka, Akio, Serge Desgreniers, and Anguang Hu. "Nitroethane at high density: an experimental and computational vibrational study." Physical Chemistry Chemical Physics 23, no. 15 (2021): 9325–36. http://dx.doi.org/10.1039/d0cp06557a.

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Raman and IR vibrational spectra confirm two molecular units associated with the monoclinic unit cell of nitroethane under high pressure. Raman spectra are extremely sensitive to predicted effects of unit cell distortion due to changes in H-bonding.

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GANGADHAR REDDY, G., T. VENKATAPPA RAO, A. RAMAKANTH, S. K. GHATAK, and S. N. BEHERA. "REENTRANT-LIKE BAND JAHN–TELLER EFFECT AND ITS FIELD DEPENDENCE." International Journal of Modern Physics B 22, no. 04 (2008): 423–34. http://dx.doi.org/10.1142/s0217979208038612.

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In the presence of the electron–lattice interaction where the lattice strain is coupled to the difference in orbital occupancy, the metallic system whose Fermi level lies in an orbitally degenerate eg band undergoes a structural transition to a lower symmetric state with distortion. The distortion is the consequence of the band Jahn–Teller (J–T) effect, and results from the gain of the electronic energy against the increase in the elastic energy. The extent of distortion depends on the nature of the density of states (DOS) and carrier concentration. These effects are examined for a system desc

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Bougrab, H., K. Inal, H. Sabar, and M. Berveiller. "Periodic dislocation configuration analysis by lattice distortion evaluation: micromechanical approach and X-ray diffraction line broadening." Journal of Applied Crystallography 37, no. 2 (2004): 270–78. http://dx.doi.org/10.1107/s0021889804001748.

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This work concerns dislocation microstructure analysis in order to assess stored elastic energy using Fourier coefficients of diffraction lines. These coefficients are related to the lattice distortion heterogeneity evaluated using a micromechanical approach. The lattice distortion formulation is based on dislocation density and Green's function tensors. The first tensor, which is a state quantity, characterizes the distortion incompatibility, while the second one characterizes the interaction phenomena between spatial positions. The proposed approach considers a given dislocation configuratio

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Hao, Jinpeng, Jinzhu Huang, Ziyi Fang, et al. "Suppression Measures of Partial Discharge at Rod–Plate Connection in Composite Tower." Energies 16, no. 9 (2023): 3712. http://dx.doi.org/10.3390/en16093712.

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Rods and plates at the connections in composite insulating material towers are commonly fixed to each other by metal bolts, which may cause electrical field distortion at the connections. So, the rod–plate connections are prone to partial discharge under polluted and wet conditions, and the resulting electric field and temperature changes can affect the mechanical and electrical performance of the whole tower. In this paper, an artificial pollution test synchronous observation platform with an infrared and visible light imager, leakage current, and voltage measurement was built to observe the

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Ikeda, Tatsuhiko, Hirokazu Tsunetsugu, and Kenji Yonemitsu. "Photoinduced Dynamics of Commensurate Charge Density Wave in 1T-TaS2 Based on Three-Orbital Hubbard Model." Applied Sciences 9, no. 1 (2018): 70. http://dx.doi.org/10.3390/app9010070.

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We study the coupled charge-lattice dynamics in the commensurate charge density wave (CDW) phase of the layered compound 1T-TaS 2 driven by an ultrashort laser pulse. For describing its electronic structure, we employ a tight-binding model of previous studies including the effects of lattice distortion associated with the CDW order. We further add on-site Coulomb interactions and reproduce an energy gap at the Fermi level within a mean-field analysis. On the basis of coupled equations of motion for electrons and the lattice distortion, we numerically study their dynamics driven by an ultrashor

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Hori, Akira, Takeo Hondoh, Mitsugu Oguro, and Vladimir Ya Lipenkov. "Ice-lattice distortion along the deepest section of the Vostok core from X-ray diffraction measurements." Annals of Glaciology 39 (2004): 501–4. http://dx.doi.org/10.3189/172756404781814528.

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AbstractWe performed X-ray diffraction measurements on eight ice samples taken between 3200 and 3611 m depth of the Vostok (Antarctica) ice core to observe lattice distortions of ice crystals. Selected samples represent three distinct sections of the core: (i) glacier (meteoric) ice with well-preserved climatic record (down to 3310 m), (ii) ‘shear zone’ at the base of the glacier ice (3450– 3537 m) within which the climatic record is disturbed by ice deformation, and (iii) accretion ice formed by freezing of subglacial Vostok lake waters at the base of the ice sheet (from about 3537 m depth to

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Kohonen, Teuvo. "Comparison of SOM Point Densities Based on Different Criteria." Neural Computation 11, no. 8 (1999): 2081–95. http://dx.doi.org/10.1162/089976699300016098.

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Point densities of model (codebook) vectors in self-organizing maps (SOMs) are evaluated in this article. For a few one-dimensional SOMs with finite grid lengths and a given probability density function of the input, the numerically exact point densities have been computed. The point density derived from the SOM algorithm turned out to be different from that minimizing the SOM distortion measure, showing that the model vectors produced by the basic SOM algorithm in general do not exactly coincide with the optimum of the distortion measure. A new computing technique based on the calculus of var

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Vassilikou-Dova, A. B., and G. Lehmann. "Superposition Model Analysis of NMR Data for TlPbI3." Zeitschrift für Naturforschung A 43, no. 12 (1988): 1072–74. http://dx.doi.org/10.1515/zna-1988-1210.

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Chemical shift anisotropies of 205Tl and 207Pb in TlPbI3 from the literature are shown to be determined by the distortions of the MIn coordination polyhedra. Application of the superposition model results in very good agreement with the patterns calculated from crystal structure data with an exponent t = 24 for the dependence on bond distance and intrinsic shift parameters of - 83.5 and -600 ppm distortion for 205Tl and 207Pb resp., larger than the value for 29Si in Mg2SiO4. The high value for the exponent suggests that mechanisms proportional to a higher power of overlap of electron density d

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Liu, Jin, Lyudmyla Adamska, Stephen K. Doorn, and Sergei Tretiak. "Singlet and triplet excitons and charge polarons in cycloparaphenylenes: a density functional theory study." Physical Chemistry Chemical Physics 17, no. 22 (2015): 14613–22. http://dx.doi.org/10.1039/c5cp01782c.

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Fu, Liangwei, Meijie Yin, Di Wu, et al. "Large enhancement of thermoelectric properties in n-type PbTe via dual-site point defects." Energy & Environmental Science 10, no. 9 (2017): 2030–40. http://dx.doi.org/10.1039/c7ee01871a.

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Thangavel, Arumugam, Marika Wieliczko, Christopher Scarborough, Birger Dittrich та John Bacsa. "An investigation of the electron density of a Jahn–Teller-distorted CrIIcation: the crystal structure and charge density of hexakis(acetonitrile-κN)chromium(II) bis(tetraphenylborate) acetonitrile disolvate". Acta Crystallographica Section C Structural Chemistry 71, № 11 (2015): 936–43. http://dx.doi.org/10.1107/s2053229615015739.

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In the crystal structure of the title homoleptic CrIIcomplex, [Cr(CH3CN)6](C24H20B)2·CH3CN, the [Cr(CH3CN)6]2+cation is a high-spind4complex with strong static, rather than dynamic, Jahn–Teller distortion. The electron density of the cation was determined by single-crystal X-ray refinements using aspherical structure factors from wavefunction calculations. The detailed picture of the electronic density allowed us to assess the extent and directionality of the Jahn–Teller distortion of the CrIIcation away from idealized octahedral symmetry. The topological analysis of the asphericald-electron d

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Ding, Sheng, Zhibin He, Tao Xu, and Zhaohong Li. "Simulation analysis of wide-band disturbance and multi-physical field coupling based on two typical cable joint insulation defects." Journal of Physics: Conference Series 3011, no. 1 (2025): 012066. https://doi.org/10.1088/1742-6596/3011/1/012066.

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Abstract This article investigates the magnetic flux density distribution characteristics of two typical cable joint insulation defects under wide-band disturbance operating conditions. By establishing a multi-physics coupling simulation model for cable joints, the magnetic flux density distribution characteristics of three broadband disturbance forms, namely, sub synchronous oscillation, super synchronous oscillation, and high-frequency resonance, were classified and discussed for cable joints under two types of insulation defects: main insulation scratches and semiconductor layer air gaps. R

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