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Journal articles on the topic 'Sequence of impulses'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Singhose, William, Erika Ooten Biediger, Ye-Hwa Chen, and Bart Mills. "Reference Command Shaping Using Specified-Negative-Amplitude Input Shapers for Vibration Reduction." Journal of Dynamic Systems, Measurement, and Control 126, no. 1 (2004): 210–14. http://dx.doi.org/10.1115/1.1650385.

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Residual vibrations can be greatly reduced by using specially-shaped reference command signals. Input shaping is one such technique that reduces vibration by convolving a sequence of impulses with any desired reference command. Several types of useful impulse sequences have been developed. Most of these have contained only positively valued impulses. However, rise time can be improved by using some negative impulses in the sequence. Unfortunately, the use of negative impulses can excite unmodeled high modes. A new type of impulse sequence containing negative impulses is proposed. These sequenc

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2

TORRI, GIANCARLO, SERGIO RINALDI, and CARLO PICCARDI. "IMPERFECT PHASE SYNCHRONIZATION IN THE LOCOMOTOR BEHAVIOR OFHALOBACTERIUM SALINARIUM." International Journal of Bifurcation and Chaos 13, no. 10 (2003): 3085–92. http://dx.doi.org/10.1142/s0218127403008399.

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A chaotic system can be used to transform a periodic input sequence of events, e.g. impulses, into a sequence of output events. Even after transient, the output sequence is often aperiodic. In particular, it might happen that the output events are basically synchronized with the input events, but that some of them are randomly skipped from the output time series (imperfect phase synchronization [Zacks et al., 1999, 2000]). This phenomenon has been neatly observed by Schimz and Hildebrand [1992] in a rich series of experiments on the locomotor behavior of Halobacterium salinarium, where the inp

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3

Singhose, W. E., W. P. Seering, and Neil C. Singer. "Time-Optimal Negative Input Shapers." Journal of Dynamic Systems, Measurement, and Control 119, no. 2 (1997): 198–205. http://dx.doi.org/10.1115/1.2801233.

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Input shaping reduces residual vibration in computer controlled machines by convolving a sequence of impulses with a desired system command. The resulting shaped input is then used to drive the system. The impulse sequence has traditionally contained only positively valued impulses. However, when the impulses are allowed to have negative amplitudes, the rise time can be improved. Unfortunately, excitation of unmodeled high modes and overcurrenting of the actuators may accompany the improved rise time. Solutions to the problem of high-mode excitation and overcurrenting are presented. Furthermor

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4

Panas, Andrey I., Tao Yang, and Leon O. Chua. "Experimental Results of Impulsive Synchronization Between Two Chua's Circuits." International Journal of Bifurcation and Chaos 08, no. 03 (1998): 639–44. http://dx.doi.org/10.1142/s0218127498000437.

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Impulsive synchronization of chaotic dynamic systems has some important applications to chaotic secure communication and chaotic spread-spectrum communication systems. In this paper we present some experimental results on impulsive synchronization between two Chua's circuits. In our experiments, only one synchronizing impulse sequence is transmitted. The robustness of impulsive synchronization with respect to variations in the frequency and the width of impulses is studied. Experimental results show that robust impulsive synchronization can be achieved under noisy conditions and a 2% parameter

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5

Ma, Fangping, Zhengtao Zhu, Di Wang, and Xiaoming Jin. "Numerical Analysis of the Wing Leading Edge Electro-Impulse De-Icing Process Based on Cohesive Zone Model." Applied Sciences 14, no. 7 (2024): 2777. http://dx.doi.org/10.3390/app14072777.

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Aircraft icing has historically been a critical cause of airplane crashes. The electro-impulse de-icing system has a wide range of applications in aircraft de-icing due to its lightweight design, low energy consumption, high efficiency, and other advantages. However, there has been little study into accurate wing electric-impulse de-icing simulation methods and the parameters impacting de-icing efficacy. Based on the damage mechanics principle and considering the influence mechanisms of interface debonding and ice fracture on ice shedding, this paper establishes a more accurate numerical model

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6

Chu, Yao, Xiuping Han, and R. Rakkiyappan. "Finite-time lag synchronization for two-layer complex networks with impulsive effects." Mathematical Modelling and Control 4, no. 1 (2024): 71–85. http://dx.doi.org/10.3934/mmc.2024007.

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<abstract><p>This paper mainly considered the finite-time lag synchronization for two-layer complex networks with impulsive effects. Different types of controllers were designed to achieve the lag synchronization of two-layer complex networks. Several sufficient conditions on lag synchronization in the sense of finite time were derived. The time for synchronization was also estimated. It is important to note that synchronization time was influenced by the initial value, as well as the impulses and impulse sequence. This implied that different impulse effects result in varying synch

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7

YANG, TAO, and LEON O. CHUA. "CHAOTIC IMPULSE RADIO: A NOVEL CHAOTIC SECURE COMMUNICATION SYSTEM." International Journal of Bifurcation and Chaos 10, no. 02 (2000): 345–57. http://dx.doi.org/10.1142/s0218127400000220.

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A chaotic impulse radio system is an ultrawide-band communication system that uses a train of very narrow baseband impulses as a carrier. In the transmitter of a chaotic impulse radio system, a message signal is modulated by two kinds of pulse carriers. Firstly, a frequency modulation is used to modulate the message signal into a subcarrier that functions as the clock pulses of a chaotic circuit. Driven by the modulated clock pulses, the chaotic circuit outputs a chaotic impulse positioning sequence which generates the positions of the carrier impulses. The specially designed chaotic circuit i

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8

Singh, T., and G. R. Heppler. "Shaped Input Control of a System With Multiple Modes." Journal of Dynamic Systems, Measurement, and Control 115, no. 3 (1993): 341–47. http://dx.doi.org/10.1115/1.2899108.

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This paper describes a method for limiting vibration in flexible systems that have more than one characteristic frequency and mode. It is only necessary to have knowledge of the component mode frequencies and damping ratios in order to be able to calculate the timing and magnitudes of the impulse sequence used in the shaping. Only two impulses, in the nonrobust case, or three impulses in a more robust case, are necessary regardless of the number of component frequencies. Simple tests are established to determine when this technique can be used and examples are presented.

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9

Antoniadis, I. "Guidance Preconditioning by an Impulse Sequence for Robust Residual Vibration Suppression." Shock and Vibration 6, no. 3 (1999): 133–45. http://dx.doi.org/10.1155/1999/250173.

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In order to suppress residual vibrations, a general method is presented for preconditioning any guidance function prior to its application to a dynamic system, by convolving it with a sequence of impulses. The approach includes first the development of the necessary design specifications for the impulse sequence, so that the robustness properties cover the widest possible variation of the system natural frequencies. Three solution methods are proposed then, with special emphasis in the achievement of the minimum possible duration time of the impulse sequence. Numerical experiments verify the e

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10

KR. AGRAWAL, SHAILESH. "GENERATION OF SYNTHETIC ACCELEROGRAMS USING ENGINEERING EARTHQUAKE SOURCE MODEL." International Journal of Structural Stability and Dynamics 04, no. 04 (2004): 497–514. http://dx.doi.org/10.1142/s0219455404001343.

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The strong motion records available during an earthquake can be treated as the response of the earth as a structural system to unknown forces acting at unknown locations. Thus, if the part of the earth participating in ground motion is modeled as a known finite elastic medium, one can model the source location and forces generated during the earthquake as an inverse problem. Based on this analogy, a simple model for the earthquake source is proposed, by assuming the source to be a sequence of impulses acting at locations yet to be found. These impulses and their locations are found using the n

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11

Dzhurov, Valerij. "APPLICATION OF SUMMARIZED FUNCTIONS FOR INFORMATION SOURCE PROTECTION." Journal scientific and applied research 3, no. 1 (2013): 51–55. http://dx.doi.org/10.46687/jsar.v3i1.62.

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Probing signals are succession of impulses with defined frequency and amplitude. The succession itself could be “masked” using changing functions (from the main carrying) under specific laws. The sequence of impulses could be described by summarized functions of different type.

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12

Finogenko, Ivan A., and Alexander N. Sesekin. "APPROXIMATION OF POSITIONAL IMPULSE CONTROLS FOR DIFFERENTIAL INCLUSIONS." Ural Mathematical Journal 8, no. 1 (2022): 43. http://dx.doi.org/10.15826/umj.2022.1.005.

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Nonlinear control systems presented as differential inclusions with positional impulse controls are investigated. By such a control we mean some abstract operator with the Dirac function concentrated at each time. Such a control ("running impulse"), as a generalized function, has no meaning and is formalized as a sequence of correcting impulse actions on the system corresponding to a directed set of partitions of the control interval. The system responds to such control by discontinuous trajectories, which form a network of so-called "Euler's broken lines." If, as a result of each such correct

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13

Chatterjee, A., and A. Ruina. "A New Algebraic Rigid-Body Collision Law Based on Impulse Space Considerations." Journal of Applied Mechanics 65, no. 4 (1998): 939–51. http://dx.doi.org/10.1115/1.2791938.

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We present a geometric representation of the set of three-dimensional rigid-body collisional impulses that are reasonably permissible by the combination of non-negative post-collision separation rate, non-negative collisional compression impulse, non-negative energy dissipation and the Coulomb friction inequality. The construction is presented for a variety of special collisional situations involving special symmetry or extremes in the mass distribution, the friction coefficient, or the initial conditions. We review a variety of known friction laws and show how they do and do not fit in the pe

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14

AlObaidi, Khaldoon, and Manousos Valyrakis. "Coherent Flow Structures Linked to the Impulse Criterion for Incipient Motion of Coarse Sediment." Applied Sciences 13, no. 19 (2023): 10656. http://dx.doi.org/10.3390/app131910656.

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Incipient motion has been a topic of investigation by researchers, engineers and scientists for more than a century. The main approach for studying sediment entrainment has been the static approach that uses temporal and spatial averaged flow parameters like bed shear stress and stream power to link them indirectly to sediment entrainment. Recent research outputs have shed light on the important role of turbulent fluctuations in the sediment transport process. It is suggested that the approach of using temporal and spatial averaged parameters fails to account for the dynamic and probabilistic

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15

Schlegel, Miloš, and Lukáš Bláha. "Parametrization of all Three Impulse Zero Vibration Input Shapers." Solid State Phenomena 164 (June 2010): 271–77. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.271.

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Input shaping has been demonstrated to be a simple method of reducing vibration in many types of controlled machines. The method is implemented by convolving a command signal with an impulse sequence of input shaper to produce a shaped input that is then used to command the system. Designing the input shaper involves determining the amplitudes and timing of the impulses such that the resulting shaped commands lead to desired levels of vibration reduction. Up to now, to the best knowledge of the authors, it is known only few special types of input shapers (ZV, ZVD, ZVDk, EI, SI,...). This paper

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16

Pogson, Jacob M., Rachael L. Taylor, Andrew P. Bradshaw, et al. "The human vestibulo-ocular reflex and saccades: normal subjects and the effect of age." Journal of Neurophysiology 122, no. 1 (2019): 336–49. http://dx.doi.org/10.1152/jn.00847.2018.

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Here we characterize in 80 normal subjects (16–84 yr (means ± SD, 47 ± 19 yr) the vestibulo-ocular reflex (VOR) and saccades in response to three-dimensional head impulses with a monocular video head impulse test (vHIT) of the right eye. Impulses toward the right lateral, right anterior, and left posterior canals (means: 0.98, 0.91, 0.79) had slightly higher mean gains compared with their counterparts (0.95, 0.86, 0.76). In the older age group (>60 yr), gains of the left posterior canal dropped 0.09 and left anterior canals rose 0.09 resulting in symmetry. All canal gains reduced with incre

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17

You, Chunli, Linxin Shu, and Xiao-bao Shu. "Approximate controllability of second-order neutral stochastic differential evolution systems with random impulsive effect and state-dependent delay." AIMS Mathematics 9, no. 10 (2024): 28906–30. http://dx.doi.org/10.3934/math.20241403.

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<p>In this paper, we have discussed a class of second-order neutral stochastic differential evolution systems, based on the Wiener process, with random impulses and state-dependent delay. The system is an extension of impulsive stochastic differential equations, since its random effect is not only from stochastic disturbances but also from the random sequence of the impulse occurrence time. By using the cosine operator semigroup theory, stochastic analysis theorem, and the measure of noncompactness, the existence of solutions was obtained. Then, giving appropriate assumptions, the approx

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18

Zieliński, Mateusz, Piotr Koniorczyk, and Zbigniew Surma. "Studies on Influence of Chromium Layer on Inner Surface of Steel Tube on Heat Transfer." Applied Sciences 13, no. 9 (2023): 5523. http://dx.doi.org/10.3390/app13095523.

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This paper presents the results of numerical calculations of heat transfer in the steel wall of a tube with different chromium layer thicknesses on the inner surface for a single and a sequence of heat impulses. In modeling the thermal phenomenon, the tube material was assumed to be homogeneous, and the inner surface of the tube had a protective chromium layer. The calculations were performed for temperature-dependent parameters of the 30HN2MFA steel and chromium. The tube was divided into 30 zones. The time varying the heat transfer coefficient and the heat flux density on the inner surface o

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19

Filipich, C. P., and M. B. Rosales. "Variational Solution for an Initial Conditions Problem." Applied Mechanics Reviews 50, no. 11S (1997): S50—S55. http://dx.doi.org/10.1115/1.3101850.

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An initial conditions problem is addressed by first transforming it into a boundary value one. An appropriate functional and an extremizing sequence are proposed. The methodology has been previously named WEM (Whole Element Method) by the authors. In the present paper, this name is justified since division of the time domain is avoided even when loads with finite number of impulses of arbitrary duration are involved. The method is theoretically founded by theorems and corolaries. Their statements are included in the work. A numerical example of an undamped single degree of freedom (SDOF) syste

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20

Akchurin, Garif, Georgiy Seliverstov та Georgiy Akchurin. "Nonlinear dynamic response оf axons ensemble excited by regular sequence оf electrical impulses EX VIVO". Izvestiya VUZ. Applied Nonlinear Dynamics 11, № 4-5 (2003): 74–79. http://dx.doi.org/10.18500/0869-6632-2003-11-4-74-79.

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In axons ensemble of somatic nerve of the frog a scenario of period-doubling bifurcations was discovered from the frog nerve response. Complex dynamics оf compound асtion potential is observed when on-line time of stimulatory electrical impulses is comparable with refractory period of the nerve.

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21

Aman, Alexander, Sören Majcherek, and Sören Hirsch. "Microwave Emission of Carbon Fibres during Electrical Breakdown." Key Engineering Materials 605 (April 2014): 544–47. http://dx.doi.org/10.4028/www.scientific.net/kem.605.544.

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A new method of reliability monitoring of electrical devices based on carbon fibres is presented. Due to the thermo-mechanical stress on electronic circuits a loss of fibre network integrity can take place and potential difference may appear between the edges of broken carbon fibres. This potential difference causes an intensive field-emission from surfaces of these broken carbon fibres and an acceleration of emitted electrons. Due to the acceleration of electrons a microwave emission is generated. A CFRP was used to simulate the behaviour of a carbon based electronic device. The sequence of m

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22

Kapila, Vikram, Anthony Tzes, and Qiguo Yan. "Closed-Loop Input Shaping for Flexible Structures Using Time-Delay Control1." Journal of Dynamic Systems, Measurement, and Control 122, no. 3 (1999): 454–60. http://dx.doi.org/10.1115/1.1286269.

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Input shaping techniques reduce the residual vibration in flexible structures by convolving the command input with a sequence of impulses. The exact cancellation of the residual structural vibration via input shaping is dependent on the amplitudes and instances of impulse application. A majority of the current input shaping schemes are inherently open-loop where impulse application at inaccurate instances can lead to system performance degradation. In this paper, we develop a closed-loop control design framework for input shaped systems. This framework is based on the realization that the dyna

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23

Nizhegorodov, A. I. "HYDROSTATIC GENERATOR OF NON-PERIODIC PRESSURE IMPULSES FOR TESTING TECHNICAL PRODUCTS." Eurasian Physical Technical Journal 18, no. 4 (38) (2021): 65–73. http://dx.doi.org/10.31489/2021no4/65-73.

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The article reviews the possibility of using the hydrostatic generators of oscillators with nonlinear power elements (elastic shells) as part of the structures of various test benches in the field of mechanical tests for vibration strength and vibration resistance, as well as when testing with external and internal pressure. The hydrostatic generator of non-periodic pressure impulses for engineering products testing is a new patented technical solution in the field of testing machines. The ratios of the angular velocities of the shafts, which provides the movement of the operating fluid into t

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24

Auersch, Lutz. "Simultaneous Measurements of the Vehicle, Track, and Soil Vibrations at a Surface, Bridge, and Tunnel Railway Line." Shock and Vibration 2017 (2017): 1–18. http://dx.doi.org/10.1155/2017/1959286.

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A complex measuring campaign has been performed including the simultaneous measurement of vehicle, track, and soil vibrations during train runs at 16, 25, 40, 63, 80, 100, 125, 140, and 160 km/h and impulse measurements of the passenger car, three track sections, and the soil. A ballast track on the soil surface and on a concrete bridge has been investigated as well as a slab track in a tunnel. The evaluation and comparison of all these data show a generally good agreement for all components if the strong low- and high-frequency cut-off characteristics of the layered and damped soil are incorp

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25

CHANG, CHIN-HUEI, YUN SHYONG CHOW, and ZHEN WANG. "ON THE ASYMPTOTIC BEHAVIOR OF HEATING TIMES." Analysis and Applications 01, no. 04 (2003): 429–32. http://dx.doi.org/10.1142/s021953050300020x.

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An infinite homogeneous d-dimensional medium initially is at zero temperature, u=0. A heat impulse is applied at the origin, raising the temperature there to a value greater than a constant value u0>0. The temperature at the origin then decays, and when it reaches u0, another equal-sized heat impulse is applied at a normalized time τ1=1. Subsequent equal-sized heat impulses are applied at the origin at the normalized times τn, n=2,3,…, when the temperature there has decayed to u0. This sequence of normalized waiting times τn can be defined recursively by [Formula: see text] where d>0. Th

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26

Afrouzi, Ghasem A., and Armin Hadjian. "A variational approach for boundary value problems for impulsive fractional differential equations." Fractional Calculus and Applied Analysis 21, no. 6 (2018): 1565–84. http://dx.doi.org/10.1515/fca-2018-0082.

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Abstract By using an abstract critical point result for differentiable and parametric functionals due to B. Ricceri, we establish the existence of infinitely many classical solutions for fractional differential equations subject to boundary value conditions and impulses. More precisely, we determine some intervals of parameters such that the treated problems admit either an unbounded sequence of solutions, provided that the nonlinearity has a suitable oscillatory behaviour at infinity, or a pairwise distinct sequence of solutions that strongly converges to zero if a similar behaviour occurs at

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27

Golieva, E., V. Skvortsov, and George Malyakin. "Ventricular arrhythmias in the practice of a entricular arrhythmias in the practice of a medical assistant." Medsestra (Nurse), no. 6 (June 1, 2020): 77–84. http://dx.doi.org/10.33920/med-05-2006-12.

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Ventricular arrhythmia is a violation of the frequency, rhythm, sequence of propagation of excitation and myocardial contraction caused by the source of impulses, which is localized below the His band: in the branches of the His band, in the Purkinje fibers or directly in the muscle thickness of the ventricles of the heart (ectopic focus of excitation). Its diagnosis is quite complex, and the consequences can be life-threatening. Treatment requires the rapid use of effective antiarrhythmic drugs.

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28

Rubbioni, Paola. "Solvability for a Class of Integro-Differential Inclusions Subject to Impulses on the Half-Line." Mathematics 10, no. 2 (2022): 224. http://dx.doi.org/10.3390/math10020224.

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In this paper, we study a semilinear integro-differential inclusion in Banach spaces, under the action of infinitely many impulses. We provide the existence of mild solutions on a half-line by means of the so-called extension-with-memory technique, which consists of breaking down the problem in an iterate sequence of non-impulsive Cauchy problems, each of them originated by a solution of the previous one. The key that allows us to employ this method is the definition of suitable auxiliary set-valued functions that imitate the original set-valued nonlinearity at any step of the problem’s iterat

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29

Mohamad, Sannay, Haydar Akça, and Valéry Covachev. "Discrete-time Cohen-Grossberg neural networks with transmission delays and impulses." Tatra Mountains Mathematical Publications 43, no. 1 (2009): 145–61. http://dx.doi.org/10.2478/v10127-009-0034-5.

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Abstract A discrete-time analogue is formulated for an impulsive Cohen- -Grossberg neural network with transmission delay in a manner in which the global exponential stability characterisitics of a unique equilibrium point of the network are preserved. The formulation is based on extending the existing semidiscretization method that has been implemented for computer simulations of neural networks with linear stabilizing feedback terms. The exponential convergence in the p-norm of the analogue towards the unique equilibrium point is analysed by exploiting an appropriate Lyapunov sequence and pr

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30

Akhmet, Marat, Madina Tleubergenova, Mehmet Onur Fen, and Zakhira Nugayeva. "Unpredictable Solutions of Linear Impulsive Systems." Mathematics 8, no. 10 (2020): 1798. http://dx.doi.org/10.3390/math8101798.

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We consider a new type of oscillations of discontinuous unpredictable solutions for linear impulsive nonhomogeneous systems. The models under investigation are with unpredictable perturbations. The definition of a piecewise continuous unpredictable function is provided. The moments of impulses constitute a newly determined unpredictable discrete set. Theoretical results on the existence, uniqueness, and stability of discontinuous unpredictable solutions for linear impulsive differential equations are provided. We benefit from the B-topology in the space of discontinuous functions on the purpos

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31

Zieliński, Mateusz, Piotr Koniorczyk, and Zbigniew Surma. "Influence of the Shrinkage of the Inner Layer of Steel Tubes on Permissible Thermal Load." Energies 17, no. 3 (2024): 702. http://dx.doi.org/10.3390/en17030702.

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This paper presents the results of numerical simulations of heat transfer in a tube with a protective chromium layer on the inner surface made of steel, with different shrinkage temperatures. Shrinkage in the steel is an unfavorable phenomenon because it causes cracks in the chrome coating. The cracks contribute to the peeling of the protective material on the inner surface of the tube. Wear and damage to the chrome layer significantly shortens the tube’s service life. The influence of the type of steel with medium carbon content on heat transfer for a sequence of ten, thirty, and sixty heat i

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32

Leiva, Hugo. "Controllability of the Strongly Damped Wave Equation with Impulses and Delay." Nonautonomous Dynamical Systems 4, no. 1 (2017): 31–39. http://dx.doi.org/10.1515/msds-2017-0004.

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AbstractEvading fixed point theorems we prove the interior approximate controllability of the following semilinear strongly damped wave equation with impulses and delay in the space Z1/2 = D((−Δ)1/2)×L2(Ω),where r > 0 is the delay, Γ = (0, τ)×Ω, ∂Γ = (0, τ) × ∂Ω, Γr = [−r, 0] × Ω, (ϕ,ψ) ∈ C([−r, 0]; Z1/2), k = 1, 2, . . . , p, Ω is a bounded domain in ℝℕ(ℕ ≥ 1), ω is an open nonempty subset of , 1 ω denotes the characteristic function of the set ω, the distributed control u ∈ L2(0, τ; U), with U = L2(Ω),η,γ, are positive numbers and f , Ik ∈ C([0, τ] × ℝ × ℝ; ℝ), k = 1, 2, 3, . . . , p. Und

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Manjula, M., K. Kaliraj, Thongchai Botmart, Kottakkaran Sooppy Nisar, and C. Ravichandran. "Existence, uniqueness and approximation of nonlocal fractional differential equation of sobolev type with impulses." AIMS Mathematics 8, no. 2 (2022): 4645–65. http://dx.doi.org/10.3934/math.2023229.

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<abstract><p>This paper is concerned with the study of nonlocal fractional differential equation of sobolev type with impulsive conditions. An associated integral equation is obtained and then considered a sequence of approximate integral equations. By utilizing the techniques of Banach fixed point approach and analytic semigroup, we obtain the existence and uniqueness of mild solutions to every approximate solution. Then, Faedo-Galerkin approximation is used to establish certain convergence outcome for approximate solutions. In order to illustrate the abstract results, we present

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Jenkins, Adrianna C., and Ming Hsu. "Dissociable Contributions of Imagination and Willpower to the Malleability of Human Patience." Psychological Science 28, no. 7 (2017): 894–906. http://dx.doi.org/10.1177/0956797617698133.

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The ability to exercise patience is important for human functioning. Although it is known that patience can be promoted by using top-down control, or willpower, to override impatient impulses, patience is also malleable—in particular, susceptible to framing effects—in ways that are difficult to explain using willpower alone. So far, the mechanisms underlying framing effects on patience have been elusive. We investigated the role of imagination in these effects. In a behavioral experiment (Experiment 1), a classic framing manipulation (sequence framing) increased self-reported and independently

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Auersch, Lutz. "The Dynamic Train–Track Interaction on a Bridge and in a Tunnel Compared with the Simultaneous Vehicle, Track and Ground Vibration Measurements on a Surface Line." Applied Sciences 13, no. 19 (2023): 10992. http://dx.doi.org/10.3390/app131910992.

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The vehicle–track interaction generates forces and consequently vibrations in the environment. The interaction has been analysed by the simultaneous measurements of vehicle, track and ground vibrations during test runs with varied train speeds. The special effects of the passage over a bridge and through a tunnel are studied and compared with the measurements on a conventional ballasted surface line. The maximum amplitudes, narrow band and one-third octave band spectra are presented for the axle-box accelerations and for the track, bridge and ground vibrations. The different frequencies and fr

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Conker, Çağlar, Hakan Yavuz, Sadettin Kapucu, Mustafa Kaan Baltacioğlu, Hüseyi̇n Turan Arat, and Alper Burgaç. "Comparison of Robust Input Shapers for Elimination of Residual Vibrations." Applied Mechanics and Materials 490-491 (January 2014): 997–1002. http://dx.doi.org/10.4028/www.scientific.net/amm.490-491.997.

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Input shaping is a feedforward control technique for improving the settling time and positioning accuracy, while minimizing residual vibrations. Shaped command profiles are generated by convolving a sequence of impulses. To design an input shaping controller, estimates of the system natural frequency and damping ratio are required. However, real systems cannot be modeled exactly, making the robustness to modeling errors an important consideration. Many robust input shapers have been developed, but robust shapers typically have longer durations that slow the system response. This creates a comp

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Rubenstein, Jeffrey S. "BACK TO BASICS." Pediatrics In Review 14, no. 12 (1993): 489–92. http://dx.doi.org/10.1542/pir.14.12.489.

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The last 20 years have seen an explosion in our knowledge of the autonomic nervous system and our ability to manipulate its parasympathetic and sympathetic portions pharmacologically to achieve therapeutic goals. This article will briefly review the structure and function of the autonomic nervous system, with particular focus on the sympathetic branch. Included in the review is a discussion of the major receptors of the sympathetic system, concentrating on their intracellular mechanism of action, their effects on major target organ systems, and some commonly used pharmacologic agents that infl

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Alhazza, Khaled A. "Adjustable maneuvering time wave-form command shaping control with variable hoisting speeds." Journal of Vibration and Control 23, no. 7 (2016): 1095–105. http://dx.doi.org/10.1177/1077546315588881.

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Classical input shaping is based on convolving a general input signal with a sequence of timed impulses. These impulses are chosen to match certain modal parameters of the system under control to eliminate residual vibrations in rest-to-rest maneuvers. This type of input shaping is strongly dependent on the system period. In this work, an adjustable maneuvering time wave form command shaper is presented. The equation of motion of a simple pendulum model of a crane is derived and solved in order to eliminate residual vibrations at the end of motion. Several cases are simulated numerically and v

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Fillerup, Jessie. "Lucia’s Ghosts: Sonic, Gothic and Postmodern." Cambridge Opera Journal 28, no. 3 (2016): 313–45. http://dx.doi.org/10.1017/s0954586716000446.

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AbstractIn this article, I use an intertextual interference – the spectral presence of Norma Desmond in a performance of Donizetti’sLucia di Lammermoor– as a locus through which to explore the consequences of the ‘open’ text in theatrical spectatorship, criticism and historical study. Norma’s ghosting of Lucia reveals how spectral effects function in musical and dramatic contexts, particularly in Gothic works. These effects replace illusions of linear teleology with temporal synchronicity and destabilise the boundaries that separate the critic or spectator from the work. Though examiningLuciat

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Meng, Kaixuan, and Yi Chen. "Stability and solvability analysis for a class of optimal control problems described by fractional differential equations with non-instantaneous impulses." Filomat 35, no. 12 (2021): 4221–37. http://dx.doi.org/10.2298/fil2112221m.

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This paper is intended as an attempt to investigate the existence and stability of solutions for a class of fractional optimal control problems characterized with non-instantaneous impulsive differential equations. By using the method of minimizing sequence and the related conclusions of set-valued mapping, the results of solvability and stability for a class of optimal control problems are obtained in the suitable metric space.

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Li, Wenhui, Qianqian Zhou, Yuzhong Zhang, et al. "An Ultra-Throughput Boost Method for Gamma-Ray Spectrometers." Energies 17, no. 6 (2024): 1456. http://dx.doi.org/10.3390/en17061456.

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(1) Background: Generally, in nuclear medicine and nuclear power plants, energy spectrum measurements and radioactive nuclide identification are required for evaluation of strong radiation fields to ensure nuclear safety and security; thereby, damage is prevented to nuclear facilities caused by natural disasters or the criminal smuggling of nuclear materials. High count rates can lead to signal accumulation, negatively affecting the performance of gamma spectrometers, and in severe cases, even damaging the detectors. Higher pulse throughput with better energy resolution is the ultimate goal of

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Kapucu, S., M. Kaplan, and S. Bayseç. "Vibration Reduction of a Lightly Damped System Using a Hybrid Input Shaping Method." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 219, no. 5 (2005): 335–42. http://dx.doi.org/10.1243/095965105x33464.

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This paper describes three different methods for generating a command profile for a lightly damped second-order system to manoeuvre it from one position to another, eliminating the residual vibrations likely to occur after the completion of the manoeuvre. The first method is a preshaped command input obtained by superimposing a cycloid onto a ramped versine + ramp function, and the second method is a reshaping of the input of any profile by convolving it with a sequence of two impulses. The third method, the ‘hybrid input method’, combines the first two methods to obtain a better robustness. T

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Singhose, W. E., L. J. Porter, T. D. Tuttle, and N. C. Singer. "Vibration Reduction Using Multi-Hump Input Shapers." Journal of Dynamic Systems, Measurement, and Control 119, no. 2 (1997): 320–26. http://dx.doi.org/10.1115/1.2801257.

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Input shaping is a method for reducing residual vibrations in computer-controlled machines. Vibration is eliminated by convolving an input shaper, which is a sequence of impulses, with a desired system command to produce a shaped input. The shaped input then becomes the command to the system. Requiring the vibration reduction to be robust to modeling errors and system nonlinearities is critical to the success of the shaping process on any real system, Input shapers can be made very insensitive to parameter uncertainty; however, increasing robustness usually increases system delays. A design pr

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Mhetre, Pallavi S., and Dr Sunita S. Lokhande. "A Survey Paper on Arrhythmia Classification Using ECG Signals." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 11 (2023): 1–11. http://dx.doi.org/10.55041/ijsrem27346.

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Cardiovascular diseases (CVDs) rank among diseasesof highest mortality. Electrocardiography (ECG) is a non-invasive tool to assess the generalcardiac condition of a patient and is therefore as first-in-line examination for diagnosis of CVD.Arrhythmia Classification plays a major role while diagnosing heart diseases. Any change in the regular sequence of electric impulses is called as arrhythmia. Identifyingarrhythmia as early as possible helps the patient in choosing appropriate treatment. Classification of ECG arrhythmia with high accuracy is a challenging problem. Arrhythmiaclassification re

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K S, Ramkumar, and Samandeep Kour. "Internal Nuclear Propulsion System for Future Space Applications." Acceleron Aerospace Journal 2, no. 5 (2024): 300–305. http://dx.doi.org/10.61359/11.2106-2423.

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Internal nuclear pulse propulsion (INPP) represents a novel approach to space propulsion, where controlled nuclear detonations occur within the spacecraft itself, offering potential advantages in safety and propulsion control compared to conventional external detonation designs like Project Orion. INPP relies on the same fundamental principles of nuclear pulse propulsion, utilizing the momentum generated by nuclear explosions to propel the spacecraft forward. Proposed INPP designs involve strategically placing small nuclear devices within the spacecraft's structure, detonating them in sequence

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Finneran, James J., Carolyn E. Schlundt, Victoria Bowman, and Keith Jenkins. "Dolphins reduce hearing sensitivity in anticipation of repetitive impulsive noise exposures." Journal of the Acoustical Society of America 153, no. 6 (2023): 3372. http://dx.doi.org/10.1121/10.0019751.

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The auditory steady-state response (ASSR) was continuously measured in two bottlenose dolphins during impulse noise exposures to determine whether observed head movements coincided with actual changes to auditory system sensitivity. Impulses were generated by a seismic air gun at a fixed inter-pulse interval of 10 s. ASSR amplitudes were extracted from the instantaneous electroencephalogram using coherent averaging within a sliding analysis window. A decline in ASSR amplitude was seen during the time interval between air gun impulses, followed by an elevation in ASSR amplitude immediately afte

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Alsheekhhussain, Zainab, Ahmed Gamal Ibrahim, and Akbar Ali. "Topological Structure of the Solution Sets for Impulsive Fractional Neutral Differential Inclusions with Delay and Generated by a Non-Compact Demi Group." Fractal and Fractional 6, no. 4 (2022): 188. http://dx.doi.org/10.3390/fractalfract6040188.

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In this paper, we give an affirmative answer to a question about the sufficient conditions which ensure that the set of mild solutions for a fractional impulsive neutral differential inclusion with state-dependent delay, generated by a non-compact semi-group, are not empty compact and an Rδ-set. This means that the solution set may not be a singleton, but it has the same homology group as a one-point space from the point of view of algebraic topology. In fact, we demonstrate that the solution set is an intersection of a decreasing sequence of non-empty compact and contractible sets. Up to now,

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PĂUN, GHEORGHE, MARIO J. PÉREZ-JIMÉNEZ, and GRZEGORZ ROZENBERG. "SPIKE TRAINS IN SPIKING NEURAL P SYSTEMS." International Journal of Foundations of Computer Science 17, no. 04 (2006): 975–1002. http://dx.doi.org/10.1142/s0129054106004212.

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We continue here the study of the recently introduced spiking neural P systems, which mimic the way that neurons communicate with each other by means of short electrical impulses, identical in shape (voltage), but emitted at precise moments of time. The sequence of moments when a neuron emits a spike is called the spike train (of this neuron); by designating one neuron as the output neuron of a spiking neural P system II, one obtains a spike train of II. Given a specific way of assigning sets of numbers to spike trains of II, we obtain sets of numbers computed by II. In this way, spiking neura

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Alici, Gürsel, Sadettin Kapucu, and Sedat Bayseç. "A robust motion design technique for flexible-jointed manipulation systems." Robotica 24, no. 1 (2005): 95–103. http://dx.doi.org/10.1017/s0263574705001785.

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This paper presents a robust input shaping technique that significantly reduces (almost eliminates) the residual vibration of manipulation systems typified by a flexible-jointed robot manipulator. The technique consists of two stages. In the first stage, a ramp function is superimposed onto the main trajectory to be preshaped. In the second stage, the outcome of the first stage is convolved with a sequence of two impulses. The robustness of the technique to the uncertainties in the system natural frequency and damping ratio are quantified through simulation and experimental evaluation. Simulat

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Voronin, A. Ya. "Criteria for identification of the form and functional properties of the soil profile in georadiolocated studies by using georadar “Loza-B”." Dokuchaev Soil Bulletin, no. 80 (September 1, 2015): 106–28. http://dx.doi.org/10.19047/0136-1694-2015-80-106-128.

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The valuable criteria for identification of the soil profile form and its some functional properties are considered as determined by interpretation of radarograms in the course of georadiolocated profiling of different territories using the geophysical device “Loza-B”. Apart from a standard set of procedures for digital processing of radarograms and constructing a temporary profile of changes in the reflected impulse amplitude along the direction of its sounding and transformation with depth, it is suggested to use the information on changing the dynamic characteristics of the wave field in ho

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