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Journal articles on the topic 'Dynamical characteristic curve'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Zhang, Qiaoyu, and Jianjun Liu. "Flow boiling instabilities of nitrogen in horizontal small diameter tube." MATEC Web of Conferences 189 (2018): 06010. http://dx.doi.org/10.1051/matecconf/201818906010.

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The flow boiling instability characteristics of nitrogen flow boiling in a horizontal small diameter tube were numerically studied, and a numerical model coupled with two phase flow boiling and system flow supplying was developed. With the steady state solution of the model, the flow boiling characteristic curve and flow supplying curve were obtained. The flow boiling characteristic curve was affected by the heat flux and inlet subcooling, meanwhile the flow supplying curve was affected by the total system pressure drop and friction feature of the flow supplying section. With the transient sol
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2

Men, Jin Jie, Qing Xuan Shi, and Qi Zhou. "Inter-Story Capacity Spectrum for the Performance Based Seismic Design of Vertically Irregular RC Frame Structures I: Method." Key Engineering Materials 517 (June 2012): 745–48. http://dx.doi.org/10.4028/www.scientific.net/kem.517.745.

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Considering the dynamical characteristic of structure under different earthquake hazard level, inelastic demand curves, namely, inter-story shear versus inter-story displacement curve are established by using mode spectrum method. Based on the relation of structure performance object and displacement ductibility, the relation of structure performance object and inter-story demand curve is established. And the inter-story demand curves take into account the inelastic behavior of structure under earthquake action adequately. Then considering the seismic respond characteristic and the capacity cu
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3

Liu, Yang, Da Wang, and Min Hai Chen. "Seismic Response Analysis of Partial Curve Long-Span Rigid Frame Bridge with Super High Pier." Advanced Materials Research 308-310 (August 2011): 1314–21. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1314.

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Based on the time history analysis method, some curve long-span rigid frame bridge with super high pier in Sichuan was taken as the studying case, and a studying of natural vibration characteristics and seismic response. Comparative study was emphasis carried on seismic performance between the partial curve bridge and the straight. In addition, the exhaustive research to about between crosswise relation to the structure overall rigidity contribution and to the structure and the seismic performance influence is conducted. The conclusion of the study shows that the seismic performance of the str
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4

Jalnine, Aleksej. "On invariant manifolds of stable trajectories in quasiperiodically forced nonlinear dynamical systems." Izvestiya VUZ. Applied Nonlinear Dynamics 8, no. 3 (2000): 17–26. http://dx.doi.org/10.18500/0869-6632-2000-8-3-17-26.

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In terms of the quasiperiodically driven Henon map we show that two—dimensional stable invariant manifolds of the nodal invariant curve of а smooth invertible three—dimensional map can possess both differentiable and fractal structure. The fractalization of manifolds precedes the destruction of a smooth invariant curve and the birth of а strange nonchaotic attractor in modeling system. An observation of the angle between manifolds along trajectories that belong to the invariant curve after its manifolds fractalization and the strange nonchaotic attractor shows аn existence оf tangencies of the
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5

Saka, Takashi. "Properties of X-ray resonant scattering in the Bragg case revealed on the Riemann surface." Acta Crystallographica Section A Foundations and Advances 72, no. 4 (2016): 472–79. http://dx.doi.org/10.1107/s2053273316005404.

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Continuing the work described in the previous paper [Saka (2016).Acta Cryst.A72, 338–348], the dynamical theory for perfect crystals in the Bragg case is reformulated using the Riemann surface. In particular, diffraction under resonant scattering conditions is investigated. The characteristic features of the dispersion surface and the rocking curve are analytically revealed using four parameters, which are the real and imaginary parts of two quantities specifying the degree of departure from the exact Bragg conditions and the reflection strength. Characteristic properties that have been deduce
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Ehret, Uwe, and Pankaj Dey. "Technical note: Complexity–uncertainty curve (c-u-curve) – a method to analyse, classify and compare dynamical systems." Hydrology and Earth System Sciences 27, no. 14 (2023): 2591–605. http://dx.doi.org/10.5194/hess-27-2591-2023.

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Abstract. We propose and provide a proof of concept of a method to analyse, classify and compare dynamical systems of arbitrary dimensions by the two key features uncertainty and complexity. It starts by subdividing the system's time trajectory into a number of time slices. For all values in a time slice, the Shannon information entropy is calculated, measuring within-slice variability. System uncertainty is then expressed by the mean entropy of all time slices. We define system complexity as “uncertainty about uncertainty” and express it by the entropy of the entropies of all time slices. Cal
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Zelik, Sergey V., Olga V. Pochinka, and Andrey A. Yagilev. "On the Minkowski dimension of some invariant sets of dynamical systems." Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva 26, no. 1 (2024): 32–43. http://dx.doi.org/10.15507/2079-6900.26.202401.32-43.

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Abstract. It is well known that a fractal set is not a submanifold of the ambient space. However, fractals arise as invariant subsets even in infinitely smooth conditions and the Minkowski dimension serves in this case as a characteristic of complexity of this scale. For example, when the equilibrium state during the Andronov-Hopf bifurcation losses its stability, the closure of the non-singular trajectory is a parametrically defined curve of the fractal type. In this work the fractal dimension of such curves is calculated. In addition, special two-parameter family of functions is studied such
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8

Pan, Hong Xia, and Jin Ying Huang. "Testing-Point Optimizing Technology Based on PSO in Fault Diagnosis." Advanced Materials Research 181-182 (January 2011): 60–65. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.60.

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In this paper, for such a complex dynamical system as gear box, the transfer characteristic model of different excitation points and responsive points is constructed. Considering the actual condition that the vibration signals from different parts the inner gear box arrive in the box’ surface by different paths and mutual mixes, the basic method on sensor optimization and testing-point configuration based on PSO is put forward for fault detection. Through the testing analysis of every point’s transfer characteristic curve and the optimization of the transfer characteristic parameters, it is no
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9

Grib, Alexander, and Olena Chykina. "The IV-characteristic of the long josephson junction at the zero-field step." Low Temperature Physics 50, no. 11 (2024): 970–75. http://dx.doi.org/10.1063/10.0030413.

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The influence of Josephson vortices on the formation of the first zero-field step is investigated theoretically by two methods. The first method is based on the numerical solution of the dynamical equations. The spatial distribution of the critical currents along the junction has a small irregularity of 10–3% at an arbitrary location, which allows the formation of zero-field steps in the IV-characteristic. The periodic motion of Josephson vortices in the junction is studied in detail using the first method. The IV-curve and the Josephson penetration depths of the magnetic field for different v
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10

Yang, Yang, Jianhui Lan, Bo Liang, et al. "Molecular Dynamics Simulations of Metal Electrode/Molten LiCl-KCl-UCl3 Mixtures Interface." Journal of The Electrochemical Society 169, no. 3 (2022): 032503. http://dx.doi.org/10.1149/1945-7111/ac579a.

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The structural and dynamical properties of the interface between metal electrode/molten LiCl-KCl-UCl3 mixtures were studied through constant charge molecular dynamics simulation. We observed a layered structure of the metal electrode/molten LiCl-KCl-UCl3 mixtures interface composed by multiple layers of anions and cations. The distribution of U3+ at the interface was ordered, and the increase of electrode charges promoted this ordered interfacial distribution. The differential capacitance curve was a flattened and bell-like shape with the maximum at a negative surface charge due to the charact
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11

Yang, Dejian, Youmin Tang, Xiu-Qun Yang, et al. "A theoretical relationship between probabilistic relative operating characteristic skill and deterministic correlation skill in dynamical seasonal climate prediction." Climate Dynamics 56, no. 11-12 (2021): 3909–32. http://dx.doi.org/10.1007/s00382-021-05678-z.

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AbstractUnderstanding the relationship between probabilistic and deterministic prediction skills is of important significance for the study of seasonal forecasting and verification. Based on the Brier skill score methodology, we have previously found a theoretical relationship between the probabilistic resolution skill and the deterministic correlation (i.e., anomaly correlation; AC) skill and a lack of necessary or consistent relationship between the probabilistic reliability skill and the deterministic skill in dynamical seasonal prediction. Here, we further theoretically investigate the rel
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12

Phillipson, R. A., P. T. Boyd, A. P. Smale, and M. S. Vogeley. "Complex variability of Kepler AGN revealed by recurrence analysis." Monthly Notices of the Royal Astronomical Society 497, no. 3 (2020): 3418–39. http://dx.doi.org/10.1093/mnras/staa2069.

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ABSTRACT The advent of new time domain surveys and the imminent increase in astronomical data expose the shortcomings of traditional time series analysis (such as power spectra analysis) in characterizing the abundantly varied, complex, and stochastic light curves of Active Galactic Nuclei (AGNs). Recent applications of novel methods from non-linear dynamics have shown promise in characterizing higher modes of variability and time-scales in AGN. Recurrence analysis in particular can provide complementary information about characteristic time-scales revealed by other methods, as well as probe t
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13

Liu, H. R., J. Z. Li, D. X. Hou, R. R. Yin, and J. S. Jiang. "Analysis of Dynamical Characteristic of Piecewise-Nonlinear Asymmetric Hysteretic System Based on Incremental Harmonic Balance Method." Discrete Dynamics in Nature and Society 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/296085.

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Considering a sort of elastic mass with asymmetric hysteresis characteristic which widespread existing in engineering field, a piecewise-nonlinear dynamical equation, which contains asymmetric hysteretic loop, is established. By using the method of Incremental Harmonic Balance (IHB), the analytic linearized algebraic equation of the system is obtained. On the basis of this algebraic equation, the coefficients of the algebraic expression are figured out by the incremental procedure and the iterative process of the regulated variable. Through the emulation, the amplitude frequency response curve
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14

Ibarra-Gómez, Rigoberto, Alfredo Márquez, and Mónica Mendoza-Duarte. "Dynamical Mechanical Analysis of Conductive BR/EPDM/CB Blends." Rubber Chemistry and Technology 77, no. 5 (2004): 947–54. http://dx.doi.org/10.5254/1.3547861.

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Abstract In the present work, Dynamical Mechanical Analysis (DMA) was employed in order to evaluate viscoelastic properties of polybutadiene (BR)/EPDM/Carbon black (CB) blends as a function of the strain amplitude. As expected, storage modulus, G', of conductive samples presented a strong dependence on strain amplitude as described by the Payne effect. This effect appears in compounds at the electrical percolation threshold and is stronger as CB content is rinsed. However, linear viscoelastic region (LVR), a characteristic section of the curve which has had little attention in this type of stu
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15

Guth, Stephen, and Themistoklis P. Sapsis. "Machine Learning Predictors of Extreme Events Occurring in Complex Dynamical Systems." Entropy 21, no. 10 (2019): 925. http://dx.doi.org/10.3390/e21100925.

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The ability to characterize and predict extreme events is a vital topic in fields ranging from finance to ocean engineering. Typically, the most-extreme events are also the most-rare, and it is this property that makes data collection and direct simulation challenging. We consider the problem of deriving optimal predictors of extremes directly from data characterizing a complex system, by formulating the problem in the context of binary classification. Specifically, we assume that a training dataset consists of: (i) indicator time series specifying on whether or not an extreme event occurs; an
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16

García-Sandoval, Juan Paulo. "On representation and interpretation of Fractional calculus and fractional order systems." Fractional Calculus and Applied Analysis 22, no. 2 (2019): 522–37. http://dx.doi.org/10.1515/fca-2019-0031.

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Abstract In this work a relationship between Fractional calculus (FC) and the solution of a first order partial differential equation (FOPDE) is suggested. With this relationship and considering an extra dimension, an alternative representation for fractional derivatives and integrals is proposed. This representation can be applied to fractional derivatives and integrals defined by convolution integrals of the Volterra type, i.e. the Riemann-Liouville and Caputo fractional derivatives and integrals, and the Riesz and Feller potentials, and allows to transform fractional order systems in FOPDE
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17

Dholakia, Shashank, Rodrigo Luger, and Shishir Dholakia. "Efficient and Precise Transit Light Curves for Rapidly Rotating, Oblate Stars." Astrophysical Journal 925, no. 2 (2022): 185. http://dx.doi.org/10.3847/1538-4357/ac33aa.

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Abstract We derive solutions to transit light curves of exoplanets orbiting rapidly rotating stars. These stars exhibit significant oblateness and gravity darkening, a phenomenon where the poles of the star have a higher temperature and luminosity than the equator. Light curves for exoplanets transiting these stars can exhibit deviations from those of slowly rotating stars, even displaying significantly asymmetric transits depending on the system’s spin–orbit angle. As such, these phenomena can be used as a protractor to measure the spin–orbit alignment of the system. In this paper, we introdu
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18

Dong, Wei, Shuqing Zhang, Xiaowen Zhang, Wanlu Jiang, and Liguo Zhang. "A novel method to measure static and dynamic complexity of time series based on visualization curves." Chaos: An Interdisciplinary Journal of Nonlinear Science 33, no. 1 (2023): 013135. http://dx.doi.org/10.1063/5.0119415.

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In this paper, reverse transition entropy (RTE) is proposed and combined with refined composite multi-scale analysis and generalized fractional-order entropy to construct the refined composite multi-scale reverse transition generalized fractional-order complexity-entropy curve (RCMS-RT-GFOCEC). This measure aims to characterize and identify different complex time series. First, RTE is used to extract the static and dynamic transition probabilities of the temporal structure. Then, the distribution area and variation law of the visualization curves are adopted to characterize different time seri
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19

Hu, Xinyu, Jing Wang, Heze Guo, Kai Jiang, Wenjing Tang, and Wei Xia. "Investigations of 2D PtS2’s Saturable Absorption Characteristic and Its Optimization to OPO’s Operation." Nanomaterials 12, no. 10 (2022): 1670. http://dx.doi.org/10.3390/nano12101670.

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A 6.2 nm-thickness platinum disulfide (PtS2) film was prepared by electron beam evaporation with post vulcanization. The nonlinear transmittance was measured by power scanning method and the modulation depth is fitted to be 13%. Based on the transmittance curve, saturable absorption parameters of PtS2 are calculated with inhomogeneously broadening mechanism, including 6.4298 × 10−19 cm−2 ground-state absorption cross-section, 2.5927 × 10−19 cm−2 excited-state absorption cross-section, and 1.043 ms excited-state lifetime. The PtS2 film combined with active time management was implemented to mod
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20

Gottschall, Julia, and Michael Courtney. "On the robustness of the fixed points for a dynamical performance characteristic-or: a closer look at the Langevin power curve." Wind Energy 18, no. 4 (2014): 663–76. http://dx.doi.org/10.1002/we.1718.

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21

Rundle, J. B., and W. Klein. "Dynamical segmentation and rupture patterns in a "toy" slider-block model for earthquakes." Nonlinear Processes in Geophysics 2, no. 2 (1995): 61–79. http://dx.doi.org/10.5194/npg-2-61-1995.

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Abstract. Lattice models for earthquakes have been shown to capture some of the dynamical properties possessed by natural fault systems. These properties include: 1) a scaling (power low) region in the curve representing event frequency as a function of magnitude and area; and 2) space-time clustering of events. To understand the physical origin of these and other effects, we examine the simplest kind of "toy" slider block model. We obtain results indicating that this model displays several additional kinds of phenomena seen in real earthquake faults, even though "realistic" physics is missing
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22

Udagawa, Masafumi. "Magnetic Response of Itinerant Spin Ice." SPIN 05, no. 02 (2015): 1540004. http://dx.doi.org/10.1142/s2010324715400044.

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We have studied the magnetic response of itinerant spin ice, by applying the cluster dynamical mean field theory (CDMFT) to the Ising Kondo lattice model on a pyrochlore lattice. As a result, we found a characteristic interplay between magnetization curve and spin ice correlation developed at low temperatures. The magnetization develops a kink-like structure at the 2/3 of its saturation value, reminiscent of kagome ice plateau. Accompanied with the magnetization process, the monopole density shows nonmonotonic magnetic field dependence with a clear minimum, reflecting a subtle energetics of sp
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23

Bauchau, Olivier A., and Jielong Wang. "Stability Analysis of Complex Multibody Systems." Journal of Computational and Nonlinear Dynamics 1, no. 1 (2005): 71–80. http://dx.doi.org/10.1115/1.1944733.

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The linearized stability analysis of dynamical systems modeled using finite element-based multibody formulations is addressed in this paper. The use of classical methods for stability analysis of these systems, such as the characteristic exponent method or Floquet theory, results in computationally prohibitive costs. Since comprehensive multibody models are “virtual prototypes” of actual systems, the applicability to numerical models of the stability analysis tools that are used in experimental settings is investigated in this work. Various experimental tools for stability analysis are reviewe
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Saksena, R. S., and P. V. Coveney. "Rheological response and dynamics of the amphiphilic diamond phase from kinetic lattice–Boltzmann simulations." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 465, no. 2106 (2009): 1977–2002. http://dx.doi.org/10.1098/rspa.2008.0479.

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The purpose of the present paper is to report on the first computational study of the dynamical and rheological response of a self-assembled diamond mesophase under Couette flow in a ternary mixture composed of oil, water and an amphiphilic species. The amphiphilic diamond mesophase arises in a wide range of chemical and biological systems, and a knowledge of its rheological response has important implications in materials science and biotechnological applications. The simulations reported here are performed using a kinetic lattice–Boltzmann method. Lyotropic liquid crystals exhibit characteri
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25

Ni, Yuan Min, and Lei Li. "Garbage Incineration and Intelligent Fusion Strategy of Secondary Pollution Control." Advanced Materials Research 853 (December 2013): 323–28. http://dx.doi.org/10.4028/www.scientific.net/amr.853.323.

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To control the secondary atmosphere pollution produced by exhaust gas in process of garbage incineration, the paper presented a sort of intelligence fusion control strategy in city garbage incineration. In the paper, aimed at the running properties of garbage incinerator and combined the mechanism of garbage combustion and contamination generation, it studied the characteristic of controlled combustion process, proposed a sort of fusion control strategy based on human simulated intelligence for controlled process, constructed the corresponding control algorithm. Finally it took a two order mod
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26

Lazzati, Davide, Gustavo Soares та Rosalba Perna. "Prompt Emission of γ-Ray Bursts in the High-density Environment of Active Galactic Nucleus Accretion Disks". Astrophysical Journal Letters 938, № 2 (2022): L18. http://dx.doi.org/10.3847/2041-8213/ac98ad.

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Abstract Long and short γ-ray bursts (GRBs) are traditionally associated with galactic environments, where circumburst densities are small or moderate (few to hundreds of protons per cubic centimeter). However, both are also expected to occur in the disks of active galactic nuclei, where the ambient medium density can be much larger. In this work we study, via semianalytical methods, the propagation of the GRB outflow, its interaction with the external material, and the ensuing prompt radiation. In particular, we focus on the case in which the external shock develops early in the evolution at
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Chen, Goong, Sze-Bi Hsu, and Jianxin Zhou. "Chaotic Vibrations of the One-Dimensional Wave Equation due to a Self-Excitation Boundary Condition." International Journal of Bifurcation and Chaos 08, no. 03 (1998): 447–70. http://dx.doi.org/10.1142/s0218127498000292.

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The nonlinear reflection curve due to a van der Pol type boundary condition at the right end becomes a multivalued relation when one of the parameters (α) exceeds the characteristic impedance value (α=1). From stability and continuity considerations, we prescribe kinematic admissibility and define hysteresis iterations with memory effects, whose dynamical behavior is herein investigated. Assume first that the left end boundary condition is fixed. We show that asymptotically there are two types of stable periodic solutions: (i) a single period-2k orbit, or (ii) coexistence of a period-2k and a
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28

Ghioca, Dragos, and Junyi Xie. "The Dynamical Mordell–Lang Conjecture for Skew-Linear Self-Maps. Appendix by Michael Wibmer." International Mathematics Research Notices 2020, no. 21 (2018): 7433–53. http://dx.doi.org/10.1093/imrn/rny211.

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Abstract Let $k$ be an algebraically closed field of characteristic $0$, let $N\in{\mathbb{N}}$, let $g:{\mathbb{P}}^1{\longrightarrow } {\mathbb{P}}^1$ be a nonconstant morphism, and let $A:{\mathbb{A}}^N{\longrightarrow } {\mathbb{A}}^N$ be a linear transformation defined over $k({\mathbb{P}}^1)$, that is, for a Zariski-open dense subset $U\subset{\mathbb{P}}^1$, we have that for $x\in U(k)$, the specialization $A(x)$ is an $N$-by-$N$ matrix with entries in $k$. We let $f:{\mathbb{P}}^1\times{\mathbb{A}}^N{\dashrightarrow } {\mathbb{P}}^1\times{\mathbb{A}}^N$ be the rational endomorphism giv
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Shi, Jianchun, Ruiqi Xu, Yuehua Ma, et al. "Monitoring Cometary Activity of 60P/Tsuchinshan During Its 2018–2019 Apparition." Astrophysical Journal 943, no. 1 (2023): 26. http://dx.doi.org/10.3847/1538-4357/ac9c5f.

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Abstract Comet 60P/Tsuchinshan is a Jupiter family comet. Since the discovery of 60P/Tsuchinshan, little research for cometary activity has been conducted on this comet, though it has returned to perihelion several times. To study the physical properties and activity characteristic of 60P/Tsuchinshan during its 2018–2019 apparition, we observed 60P/Tsuchinshan with broadband B, V, and R filters from 2018 November to 2019 March by using the 80 cm Yaoan High Precision Telescope at Yaoan Station of Purple Mountain Observatory, Chinese Academy of Sciences. Morphological analysis and photometric st
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30

Helmi, A., F. van Leeuwen, P. J. McMillan, et al. "Gaia Data Release 2." Astronomy & Astrophysics 616 (August 2018): A12. http://dx.doi.org/10.1051/0004-6361/201832698.

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Context. Aims. The goal of this paper is to demonstrate the outstanding quality of the second data release of the Gaia mission and its power for constraining many different aspects of the dynamics of the satellites of the Milky Way. We focus here on determining the proper motions of 75 Galactic globular clusters, nine dwarf spheroidal galaxies, one ultra-faint system, and the Large and Small Magellanic Clouds. Methods. Using data extracted from the Gaia archive, we derived the proper motions and parallaxes for these systems, as well as their uncertainties. We demonstrate that the errors, stati
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Bankes, S. C., and D. Margoliash. "Parametric modeling of the temporal dynamics of neuronal responses using connectionist architectures." Journal of Neurophysiology 69, no. 3 (1993): 980–91. http://dx.doi.org/10.1152/jn.1993.69.3.980.

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1. We describe an exploratory approach to the parametric modeling of dynamical (time-varying) neurophysiological data. The models use stimulus data from a window of time to predict the neuronal firing rate at the end of that window. The most successful models were feedforward three-layered networks of input, hidden, and output “nodes” connected by weights that were adjusted during a training phase by the backpropagation algorithm. The memory in these models was represented by delay lines of varying length propagating activation between the layers. Connectionist models with no memory (1 sequent
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Beniyama, Jin, Ryou Ohsawa, Chrysa Avdellidou, et al. "Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN35 across a Wide Range of Phase Angles: Possible Mission-accessible A-type Asteroid." Astronomical Journal 166, no. 6 (2023): 229. http://dx.doi.org/10.3847/1538-3881/ad0151.

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Abstract Studying small near-Earth asteroids is important in order to understand their dynamical histories and origins as well as to mitigate the damage caused by asteroid impacts on Earth. We report the results of multicolor photometry of the tiny near-Earth asteroid 2015 RN35 using the 3.8 m Seimei telescope in Japan and the TRAPPIST-South telescope in Chile over 17 nights in 2022 December and 2023 January. We observed 2015 RN35 across a wide range of phase angles from 2° to 30° in the g, r, i, and z bands in the Pan-STARRS system. These lightcurves show that 2015 RN35 is in a nonprincipal a
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Ipmawan, Vico Luthfi, Ikah N. P. Permanasari, and Cahli Suhendi. "Improving Quality of Microtremor Data with Application of Empirical Mode Decomposition Method, Case Study: East Tanjung Karang, Bandar Lampung." IOP Conference Series: Earth and Environmental Science 830, no. 1 (2021): 012058. http://dx.doi.org/10.1088/1755-1315/830/1/012058.

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Abstract Microtremor can be used for determining ground dynamical characteristic. We have measured microtremor data in East Tanjung Karang, Bandar Lampung. Collecting proper data in some urban areas like East Tanjung Karang is a difficult work because it produced data with a lot of transient signal caused by many human activities and industrial work. One of method to removed transient signal is Empirical Decomposite Method (EMD). EMD decompose an input signal (in time series) into several intrinsic mode functions (IMF) and a residual function. We made the first synthetic signal contained frequ
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Ipmawan, Vico Luthfi, Ikah N. P. Permanasari, and Cahli Suhendi. "Improving Quality of Microtremor Data with Application of Empirical Mode Decomposition Method, Case Study: East Tanjung Karang, Bandar Lampung." IOP Conference Series: Earth and Environmental Science 830, no. 1 (2021): 012058. http://dx.doi.org/10.1088/1755-1315/830/1/012058.

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Abstract Microtremor can be used for determining ground dynamical characteristic. We have measured microtremor data in East Tanjung Karang, Bandar Lampung. Collecting proper data in some urban areas like East Tanjung Karang is a difficult work because it produced data with a lot of transient signal caused by many human activities and industrial work. One of method to removed transient signal is Empirical Decomposite Method (EMD). EMD decompose an input signal (in time series) into several intrinsic mode functions (IMF) and a residual function. We made the first synthetic signal contained frequ
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35

Saillenfest, M., B. Tabone, and E. Behar. "Solar wind dynamics around a comet." Astronomy & Astrophysics 617 (September 2018): A99. http://dx.doi.org/10.1051/0004-6361/201832742.

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Aims. Observations of solar protons near comet 67P/Churyumov–Gerasimenko (67P) by the Rosetta spacecraft can be modelled by the planar motion in an effective magnetic field proportional to 1/r2. We aim to provide a thorough study of such dynamics, with a clear description of the behaviour of an incoming flux of particles. We will be able, then, to calibrate the free parameters of the model to Rosetta observations. Methods. Basic tools of dynamical analysis are used. They lead to a definition of the relevant parameters for the system and a classification of the possible types of trajectories. U
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Henkel, C., S. Mühle, G. Bendo, et al. "Molecular line emission in NGC 4945, imaged with ALMA." Astronomy & Astrophysics 615 (July 2018): A155. http://dx.doi.org/10.1051/0004-6361/201732174.

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NGC 4945 is one of the nearest (D ≈ 3.8 Mpc; 1″ ≈ 19 pc) starburst galaxies. To investigate the structure, dynamics, and composition of the dense nuclear gas of this galaxy, ALMA band 3 (λ ≈ 3−4 mm) observations were carried out with ≈2″ resolution. Three HCN and two HCO+ isotopologues, CS, C3H2, SiO, HCO, and CH3C2H were measured. Spectral line imaging demonstrates the presence of a rotating nuclear disk of projected size 10″ × 2″ reaching out to a galactocentric radius of r ≈ 100 pc with position angle PA = 45° ± 2°, inclination i = 75° ± 2° and an unresolved bright central core of size ≲2″.
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YAN, Y., W. Q. WANG, and L. X. ZHANG. "NONLINEAR VIBRATION CHARACTERISTICS OF FLUID-FILLED DOUBLE-WALLED CARBON NANOTUBES." Modern Physics Letters B 23, no. 22 (2009): 2625–36. http://dx.doi.org/10.1142/s0217984909020746.

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Nonlinear vibration behaviors of double-walled carbon nanotubes (DWCNTs) with fluid inside the inner tube are investigated based on Donnell's cylindrical shell model and the more refined van der Waals (vdW) interaction formula. The Galerkin method and harmonic balance method are used to study the issue. The results obtained show that the radial vibrational modes of simply supported DWCNTs have twice the dynamical mode transitions as the frequency increases. The transitions correspond to twice the noncoaxial vibrations which play a critical role in electronic and transport properties of CNTs. M
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Shen, Ying, Yachun Jia, Ru Zhang, et al. "Using Circ-ANAPC7 As a Novel Type of Biomarker in the Monitoring of Acute Myeloid Leukemia." Blood 134, Supplement_1 (2019): 5179. http://dx.doi.org/10.1182/blood-2019-128179.

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Introduction: Acute myeloid leukemia (AML) is a heterogeneous disease characterized by the clonal proliferation of immature myeloid progenitor cells in the bone marrow, compressing normal blood cell production and leading to bone marrow failure ultimately. Overwhelming evidence has established that non-coding RNAs (ncRNAs), such as long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) have great role in AML pathogenesis. Circular RNAs (circRNAs) that occupy gene expression at the transcriptional or post-transcriptional level have great potential to be biomarker for types of cancers. We h
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Çam, Necda, and Ümit Akıncı. "Effect of the dipolar interaction on the dynamic hysteresis properties of 2D-nanodisks: out of plane driving field case." Physica Scripta 98, no. 12 (2023): 125976. http://dx.doi.org/10.1088/1402-4896/ad0d98.

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Abstract We have systematically investigated the effect of dipolar interaction strength on the dynamical hysteresis behavior of the in-plane uniaxial anisotropic nanodisk system modeled by the classical Heisenberg model under the effect of the time-dependent external out-of-plane periodic magnetic field. Dynamical hysteresis loops, as well as hysteresis quantities (hysteresis loop area, coercive field, remanent magnetization), have been examined both in-plane and out-of-plane magnetization components by means of Monte Carlo simulation based on Metropolis Algorithm. Our simulation results sugge
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Yilmaz Başer, Hülya, Turan Evran, and Mehmet Akif Cifci. "Machine Learning-Augmented Triage for Sepsis: Real-Time ICU Mortality Prediction Using SHAP-Explained Meta-Ensemble Models." Biomedicines 13, no. 6 (2025): 1449. https://doi.org/10.3390/biomedicines13061449.

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Background/Objectives: Optimization algorithms are acknowledged to be critical in various fields and dynamical systems since they provide facilitation in identifying and retrieving the most possible solutions concerning complex problems besides improving efficiency, cutting down on costs, and boosting performance. Metaheuristic optimization algorithms, on the other hand, are inspired by natural phenomena, providing significant benefits related to the applicable solutions for complex optimization problems. Considering that complex optimization problems emerge across various disciplines, their s
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Zhao, Chunguang, Zhiyong Fan, Peixuan Li, Micheale Yihdego Gebreyohanes, Zhiwei Wang, and Jiliang Mo. "Research on the Dynamic Response Characteristics of a Railway Vehicle Under Curved Braking Conditions." Vehicles 7, no. 1 (2025): 18. https://doi.org/10.3390/vehicles7010018.

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When a railway train runs along a curved track with braking, the dynamic behaviors of the vehicle are extremely complex and difficult to accurately reveal due to the coupling effects between the wheel–rail interactions and the disc–pad frictions. Therefore, a rigid–flexible coupled trailer car dynamics model of a railway train is established. In this model, the brake systems and vehicle system are dynamically coupled via the frictions within the braking interface, wheel–rail relationships and suspension systems. Furthermore, the effectiveness of the established model is validated by a comparis
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Yuan, Jian Yi. "Dynamic Stress-Strain Relationship of Saturated Clay by Dynamic Triaxial Test." Advanced Materials Research 250-253 (May 2011): 3183–86. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.3183.

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Subgrade diseases are exposed more and more serious with raising speed of existing railway in wide range. Fro the complexity of dynamic stress-strain relationship of soil, dynamic triaxial test was used to analyze .the dynamic mechanics behavior under cyclic train load for saturated soft clay in Yangtze Delta region. Compaction coefficient, confining pressure, dynamic shear strsss ratio, inputing stimulus and loading frequence were taken into account in test. The results show that the dynamic stress-strain curves of soil specimen are provided with prominent hysteretic characteristics and area
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43

Askar, Sameh, Abdulrahman Al-khedhairi, Amr Elsonbaty, and Abdelalim Elsadany. "Chaotic Discrete Fractional-Order Food Chain Model and Hybrid Image Encryption Scheme Application." Symmetry 13, no. 2 (2021): 161. http://dx.doi.org/10.3390/sym13020161.

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Using the discrete fractional calculus, a novel discrete fractional-order food chain model for the case of strong pressure on preys map is proposed. Dynamical behaviors of the model involving stability analysis of its equilibrium points, bifurcation diagrams and phase portraits are investigated. It is demonstrated that the model can exhibit a variety of dynamical behaviors including stable steady states, periodic and quasiperiodic dynamics. Then, a hybrid encryption scheme based on chaotic behavior of the model along with elliptic curve key exchange scheme is proposed for colored plain images.
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44

Rout*, Arpeet. "LATTICE DYNAMICAL STUDY OF THORIUM SULPHIDE." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 06 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem35432.

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Thorium sulfide (ThS) is a chemical compound composed of thorium and sulfur atoms, with the chemical formula ThS. It belongs to the class of sulfides. To understand the dimensional stability and thermal behaviour of thorium sulphide (ThS), a lattice dynamical research issued to investigate its vibrational characteristics. We study the density of states (DOS) and phonon dispersion in the 50–60 GHz frequency region using computational techniques. Important information about the stability of the ThS crystal structure are given by the phonon dispersion curves, namely the presence of imaginary phon
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Rédl, J., and V. Váliková. "Application of differential geometry in agricultural vehicle dynamics." Research in Agricultural Engineering 59, Special Issue (2013): S34—S41. http://dx.doi.org/10.17221/49/2012-rae.

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This paper deals with the application of differential geometry methods to a precise calculation of the length of trajectory of an agricultural mechanism that moves on a sloping terrain. We obtained technical exciting function from experimental measurements, out of which we obtained the function of Euler’s parameters by using computer processing. The processing of these parameters provided translational and angular velocities of the gravity centre of the systemic vehicle MT8-222, which performed the determined mounted manoeuvres. We obtained differential equations that describe the fu
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Chen, Xu, Shuncheng Liu, Tong Yuan, et al. "Optimizing Block Skipping for High-Dimensional Data with Learned Adaptive Curve." Proceedings of the ACM on Management of Data 3, no. 1 (2025): 1–26. https://doi.org/10.1145/3709710.

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In the realm of big data and cloud analytics, efficiently managing and retrieving high-dimensional data presents a critical challenge. Traditional indexes often struggle with the storage overhead inherent in large datasets. There is a growing interest in the adoption of Small Materialize Aggregation (SMA) among cloud database vendors due to its ability to maintain lightweight block-level metadata, facilitating efficient block skipping. However, SMA performance relies heavily on data layout. This is especially critical in scenarios with wide tables containing hundreds of dimensions, where the c
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47

Seo, Sun-Min, and Myoung-Joo Lee. "A Study on the Hair Design That Adopted the Formative Characteristics of Zaha Hadid's Architecture." Journal of the Korean Society of Cosmetology 28, no. 3 (2022): 459–68. http://dx.doi.org/10.52660/jksc.2022.28.3.459.

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The purpose of this study is to analyze constitutive and geometric formativeness from architecture designed by Zaha Hadid. We made total 4 hair design work based on analysis and the result are as follows. First, We analyze Zaha Hadid’s formativeness according to period of beginning, middle and latter in order to understand background of formation. At the beginning, the architecture was effected by de-constructivism so it features atypically geometric structure with dynamical- diagonal line. At the middle, irregular curves shows dynamic and the combination of porosity and systematic shows forma
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Song, Zhaoxu, Kun Fang, Xiaofang Sun, et al. "An Effective Method to Accurately Extract the Parameters of Single Diode Model of Solar Cells." Nanomaterials 11, no. 10 (2021): 2615. http://dx.doi.org/10.3390/nano11102615.

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A non-iterative method is presented to accurately extract the five parameters of single diode model of solar cells in this paper. This method overcomes the problems of complexity and accuracy by simplifying the calculation process. Key parts of the equation are to be adjusted dynamically so that the desired five parameters can be obtained from the I-V curve. Then, the I-V and P-V characteristic curves of solar cells are used to compare the effectiveness of this method with other methods. Furthermore, the root mean square error analysis shows that this method is more applicable than other metho
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Mobayen, Saleh, Christos K. Volos, Sezgin Kaçar, Ünal Çavuşoğlu, and Behrouz Vaseghi. "A Chaotic System with Infinite Number of Equilibria Located on an Exponential Curve and Its Chaos-Based Engineering Application." International Journal of Bifurcation and Chaos 28, no. 09 (2018): 1850112. http://dx.doi.org/10.1142/s0218127418501122.

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This paper proposes a novel chaotic system with infinite number of equilibria located on an exponential curve. It signifies an exciting category of dynamical systems which display many features of regular and chaotic motions. The proposed chaotic system belongs to the general category of chaotic systems with hidden attractors. Moreover, some theoretical analyses of the chaotic system’s dynamical characteristics are presented. Using the developed chaotic system, the new random number generator and encryption algorithm have been designed. Encryption application and security analysis are presente
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Gao, Yuxin, Yong Yang, Yuan Ma, and Weixiang Xu. "Study on Intelligent Diagnosis of Railway Turnout Switch Based on Improved FastDTW and Time Series Segmentation under Big Data Monitoring." Mathematical Problems in Engineering 2022 (August 26, 2022): 1–9. http://dx.doi.org/10.1155/2022/7048813.

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Turnout equipment is a key component to ensure the safe operation of trains. How to identify turnout faults is one of the important tasks of railway engineering departments and electrical departments. We used machine learning algorithm to analyze the similarity of mechanical characteristic data during turnout actions and then realized the intelligent diagnosis of turnout faults under the background of big data. We segmented the mechanical motion curve according to the characteristics of the original curve, calculated the similarity between the motion curve to be diagnosed and the template moti
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