Готові списки джерел за темами / Stability to noise

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій
Звіти організацій

Добірка наукової літератури з теми "Stability to noise"

Автор: Grafiati

Опубліковано: 9 листопада 2024

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Stability to noise".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Stability to noise"

Li, Jichang, Guanbin Li, Hui Cheng, Zicheng Liao, and Yizhou Yu. "FedDiv: Collaborative Noise Filtering for Federated Learning with Noisy Labels." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 4 (March 24, 2024): 3118–26. http://dx.doi.org/10.1609/aaai.v38i4.28095.

Повний текст джерела

Анотація:

Federated Learning with Noisy Labels (F-LNL) aims at seeking an optimal server model via collaborative distributed learning by aggregating multiple client models trained with local noisy or clean samples. On the basis of a federated learning framework, recent advances primarily adopt label noise filtering to separate clean samples from noisy ones on each client, thereby mitigating the negative impact of label noise. However, these prior methods do not learn noise filters by exploiting knowledge across all clients, leading to sub-optimal and inferior noise filtering performance and thus damaging training stability. In this paper, we present FedDiv to tackle the challenges of F-LNL. Specifically, we propose a global noise filter called Federated Noise Filter for effectively identifying samples with noisy labels on every client, thereby raising stability during local training sessions. Without sacrificing data privacy, this is achieved by modeling the global distribution of label noise across all clients. Then, in an effort to make the global model achieve higher performance, we introduce a Predictive Consistency based Sampler to identify more credible local data for local model training, thus preventing noise memorization and further boosting the training stability. Extensive experiments on CIFAR-10, CIFAR-100, and Clothing1M demonstrate that FedDiv achieves superior performance over state-of-the-art F-LNL methods under different label noise settings for both IID and non-IID data partitions. Source code is publicly available at https://github.com/lijichang/FLNL-FedDiv.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zeng, Chunhua, Tao Yang, Qinglin Han, Chun Zhang, Dong Tian, and Hua Wang. "Noises-induced toggle switch and stability in a gene regulation network." International Journal of Modern Physics B 28, no. 31 (December 8, 2014): 1450223. http://dx.doi.org/10.1142/s0217979214502233.

Повний текст джерела

Анотація:

It is well-known that noises are inevitable in gene regulatory networks due to the low-copy numbers of molecules and environmental fluctuations. In this paper, we investigate the stationary probability distribution (SPD) between both low (OFF state) and high (ON state) protein levels and mean first passage time (MFPT) in an abstract model of the Myc/E2F/miR-17-92 network presented by Aguda et al., PNAS 105, 19678 (2008), where the gene expression is assumed to be disturbed simultaneously by intrinsic and extrinsic noises that were correlated. Our results show that (i) the OFF state is enhanced by the extrinsic noise (D), while the ON state is enhanced by the intrinsic noise (Q) or cross-correlation between two noises (λ); (ii) for the cases of negative or no cross-correlation (λ⩽0.0), the increase of the noise intensity (D or Q) leads to a decline of the MFPT and enhances the probability of toggle switch to the OFF state; (iii) but for the case of positive cross-correlation (λ>0.0), the MFPT as a function of the noise intensity (D or Q) exhibits a maximum, this maximum for MFPT identifies the characteristic of noise enhanced stability of the ON state and (iv) the cross-correlation between two noises can enhance stability of the ON state.

Стилі APA, Harvard, Vancouver, ISO та ін.

Jia, Zheng-Lin, Chun-Yan Yang, Bao-Yu Ma, and Ying Chen. "Noise enhanced stability of an active particle in a spatial metastable potential driven by cross-correlated noises." Journal of Statistical Mechanics: Theory and Experiment 2022, no. 6 (June 1, 2022): 063205. http://dx.doi.org/10.1088/1742-5468/ac7792.

Повний текст джерела

Анотація:

Abstract We investigate the escape dynamics of an active Brownian particle (ABP) in a spatial cubic potential subject to the cross-correlated multiplicative noise and additive noise. Based on the Schweitzer–Ebeling–Tilch model, the effects of noise strength, cross-correlation intensity between noises, damping coefficient and potential amplitude on the mean escape time (MET) from a metastable potential state are analyzed. The results indicate that the MET exhibits a non-monotonic behavior with a maximum as a function of the intensities of the multiplicative and additive noises, identifying the occurrence of the noise enhanced stability (NES) effects induced by the multiplicative noise and by the additive noise. The increase of the cross-correlation strength always enhances the NES effect induced by the additive noise, regardless of the cross-correlation between noises is positive or negative. However, the positive and negative cross-correlation play an opposite role on the NES effect induced by the multiplicative noise. Moreover, the NES effects induced by the additive and multiplicative noises can be enhanced by the increase of the damping coefficient and the potential amplitude. A physical mechanism for the NES effect of the ABP can be understood as the fact that a certain amount of noise can stabilize the sojourn of the ABP in a limit cycle. Our results demonstrate that the cross-correlation between noises may provide a possible strategy for controlling the stability of active particle systems.

Стилі APA, Harvard, Vancouver, ISO та ін.

Wang, Kang-Kang, Ya-Jun Wang, Hui Ye, and Sheng-Hong Li. "Time delay and cross-correlated Gaussian noises-induced stochastic stability and regime shift between steady states for an insect outbreak system." International Journal of Biomathematics 12, no. 04 (May 2019): 1950048. http://dx.doi.org/10.1142/s1793524519500487.

Повний текст джерела

Анотація:

In this paper, we focus on investigating the stochastic stability and the regime transition between the endangered state and the boom state for a time-delayed insect growth system driven by correlated external and internal noises. By use of the Fokker–Planck equation, the method of small time delay approximation and the fast descent method, we explore in detail the joint action of noise terms and time delay on the mean reproduction and depression time for the insect population. Our investigations indicate that the pseudo-resonance phenomenon of the mean first-passage time (MFPT) occurs because of the impact of different noises and time delay. Through the numerical calculation, it is discovered that multiplicative noise can speed up the shift of the insect population from the boom state to the endangered one, while the noise correlation and time delay can propel the insect system to evolve from the endangered state to the boom state and improve the biological stability. In addition, the impact of the additive noise on the stability of the biological system depends on the positive and negative situation of the noise correlation. On the other hand, during the process of suppressing the insect explosion, it is beneficial to the pest control to amplify the association noise strength and weaken the intensities of the multiplicative, additive noises and time delay. However, during the process of eliminating the pests, it can produce nice effect on the disinsection to increase time delay, the intensities of multiplicative and additive noises and weaken the strength of noise correlation.

Стилі APA, Harvard, Vancouver, ISO та ін.

Benocci, Roberto, H. Eduardo Roman, Chiara Confalonieri, and Giovanni Zambon. "Investigation on clusters stability in DYNAMAP’s monitoring network during Covid-19 outbreak." Noise Mapping 7, no. 1 (December 6, 2020): 276–86. http://dx.doi.org/10.1515/noise-2020-0023.

Повний текст джерела

Анотація:

AbstractFrom March 23rd to May 3rd 2020, Italy underwent a complete lockdown in the attempt to contain the spread of the pandemic due to Covid-19 outbreak. During this period, a new kind of environment has been experienced in all cities, resulting in an abatement of traffic noise levels. Consequently, due to the prohibition of all non-essential activities, traffic noise dynamics changed as well. In this paper, we analyse the data recorded from the permanent noise monitoring network installed in the pilot area of the city of Milan, Italy. The results show how, besides a dramatic reduction of the noise levels (about 6 dB on average), also the noise pattern was profoundly changed. This is particularly important in the framework of DYNAMAP, a statistically based European project able to predict traffic noise over an extended area based on the noise recorded by limited number of monitoring stations. The change of the traffic dynamics, resulting in different noise patterns of the normalized hourly median profiles for each sensor, pose some limitations about the use of such predicting tool during extraordinary situations such as that experienced during a lockdown.

Стилі APA, Harvard, Vancouver, ISO та ін.

Randa, J., L. P. Dunleavy, and L. A. Terrell. "Stability measurements on noise sources." IEEE Transactions on Instrumentation and Measurement 50, no. 2 (April 2001): 368–72. http://dx.doi.org/10.1109/19.918144.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Astorino, John F. "Active noise cancellation stability solution." Journal of the Acoustical Society of America 121, no. 3 (2007): 1283. http://dx.doi.org/10.1121/1.2720039.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Mackey, Michael C., Andr� Longtin, and Andrzej Lasota. "Noise-induced global asymptotic stability." Journal of Statistical Physics 60, no. 5-6 (September 1990): 735–51. http://dx.doi.org/10.1007/bf01025992.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jin, Yanfei, and Siyong Niu. "Stability of a Beddington–DeAngelis type predator–prey model with trichotomous noises." International Journal of Modern Physics B 30, no. 17 (June 30, 2016): 1650102. http://dx.doi.org/10.1142/s0217979216501022.

Повний текст джерела

Анотація:

The stability analysis of a Beddington–DeAngelis (B–D) type predator–prey model driven by symmetric trichotomous noises is presented in this paper. Using the Shapiro–Loginov formula, the first-order and second-order solution moments of the system are obtained. The moment stability conditions of the B–D predator–prey model are given by using Routh–Hurwitz criterion. It is found that the stabilities of the first-order and second-order solution moments depend on the noise intensities and correlation time of noise. The first-order and second-order moments are stable when the correlation time of noise is increased. That is, the trichotomous noise plays a constructive role in stabilizing the solution moment with regard to Gaussian white noise. Finally, some numerical results are performed to support the theoretical analyses.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhang, Chang-Yue, Zhu-Jun Zheng, Shao-Ming Fei, and Mang Feng. "Dynamics of Quantum Networks in Noisy Environments." Entropy 25, no. 1 (January 12, 2023): 157. http://dx.doi.org/10.3390/e25010157.

Повний текст джерела

Анотація:

Noise exists inherently in realistic quantum systems and affects the evolution of quantum systems. We investigate the dynamics of quantum networks in noisy environments by using the fidelity of the quantum evolved states and the classical percolation theory. We propose an analytical framework that allows us to characterize the stability of quantum networks in terms of quantum noises and network topologies. The calculation results of the framework determine the maximal time that quantum networks with different network topologies can maintain the ability to communicate under noise. We demonstrate the results of the framework through examples of specific graphs under amplitude damping and phase damping noises. We further consider the capacity of the quantum network in a noisy environment according to the proposed framework. The analytical framework helps us better understand the evolution time of a quantum network and provides a reference for designing large quantum networks.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Stability to noise"

Grein, Matthew Edward 1970. "Noise and stability of actively modelocked fiber lasers." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29237.

Повний текст джерела

Анотація:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
Includes bibliographical references (leaves 162-174).
The timing jitter of a modelocked laser is fundamentally limited by the amplified spontaneous emission in the laser cavity. While one cannot, even in principle, remove this source of noise, one does have control over the pulse timing by using filtering and modulation. In this thesis, we report on the advances made in developing the understanding of timing jitter and stability in actively modelocked soliton fiber lasers. The main achievements reported here are: the development of a theory for quantum-limited timing jitter for the cases of amplitude and phase modulation (AM and PM, respectively); identification of a set of characteristic coefficients governing the physics of pulse retiming that depend on the laser parameters; construction of an apparatus-including the development of harmonically modelocked soliton fiber lasers in both a ring and a sigma configuration-to measure the predicted coefficients; and residual phase-noise measurements of the quantum-limited timing jitter using homodyne detection. The measurements of the characteristic coefficients and the timing jitter were found to be in good agreement with the theory. In addition, a theory for the case of harmonic modelocking was developed, and it is shown that the supermodes reveal pulse-to-pulse correlation statistics and must be included in measurements and calculations of the timing jitter. For the case of uncorrelated timing jitter between different pulses in the laser cavity, the supermodes are predicted to have the same timing jitter spectrum as the baseband mode, and this is confirmed by measurements.
(cont.) A scheme for reducing the timing jitter of a pulse train outside of the laser cavity using group-velocity dispersion and phase modulation is described, and it is shown theoretically that a reduction in the timing jitter is possible, but only at the expense of the carrier-frequency fluctuations. It is also shown that two-photon absorption in a semiconductor mirror structure prevented pulse dropouts in a short harmonically modelocked soliton fiber laser producing picosecond pulses at 2 GHz.
by Matthew Edward Grein.
Ph.D.

Стилі APA, Harvard, Vancouver, ISO та ін.

Bandla, Atchaiah. "Highly Linear 2.45 GHz Low-Noise Amplifier Design." Thesis, Linköpings universitet, Fysik och elektroteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119982.

Повний текст джерела

Анотація:

One critical component of the communication receiver of front-end system is the low-noise amplifier (LNA). For good sensitivity and dynamic range, the LNA should provide a low noise figure and maximum attainable power gain. Another concern is the linearity of the LNA. Strong signals produce intermodulation products in a frequency band close to the operating frequency that might affect the performance of the receiver. In many cases, the intermodulation products can be reduced by increasing the current through the active device. Hence, a trade-off between power consumption and linearity must be considered when designing the LNA. The thesis includes the bias network design, stability analysis, matching network design and layout design of the LNA RF module with layout simulation. The simulation has been performed using Advanced Design System (ADS) simulation software. After implementation of LNA on a PCB, the LNA is measured with the help of the power supply unit and vector network analyzer. The proposed design aim is to provide a low noise figure (NF) and high gain while maintaining the low power consumption.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ananthaganeshan, Kanapathipillai Arunachalam. "Stability and performance of active vibration isolation systems." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273915.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Salgado, Adriana M. "Jet hydrodynamic and noise calculations using the parabolized stability equations." Thesis, University of Southampton, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.560810.

Повний текст джерела

Анотація:

The non-linear parabolized stability equations (NLPSE) are implemented in a hybrid model for studying noise from round jets. The NLPSE computes instability waves in the flow that may interact nonlinearly to produce noise. This mechanism for noise generation is believed to be a significant contributor to low-frequency noise from subsonic round jets. The NLPSE code has been validated against direct numerical simulation (DNS) data for a number of model problems and the suitability of the method for modelling jet flows has been studied by comparing the results with D S. Near-field results show good qualitative agreement with the DNS. However, the LPSE over predicts the magnitude of near-field fluctuations, which degrades the quality of the final sound-field prediction. It is found that the NLPSE results are highly dependent on the rate of divergence (non-parallelism) of the mean-flow and that a certain amount of eo-flow is necessary to stabilise the downstream-marching numerical scheme for solving the NLPSE. Changing the Mach number confirmed that the NLPSE is very well suited for supersonic jet studies but has difficulty resolving low Mach number jets. It is found that hot jets are also numerically difficult to resolve because the magnitudes of the instability waves increase greatly as the temperature is increased. A linearised Euler equation (LEE) code has been adapted to the round jet problem and found to be an accurate tool for obtaining the sound field from sources defined in the near-field of the jet. By including sources into this code, a LPSE-LEE hybrid code has been implemented, with the LEE part validated against DNS by using modelled near-field sources. Use of this new approach has shown that much can be learnt about the behaviour of jets and the parameters that influence the noise they produce.

Стилі APA, Harvard, Vancouver, ISO та ін.

Gruman, Fredrick S. (Fredrick Steven). "Stability analysis of the optical reference gyro discrete noise eliminator." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36459.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Siakalli, Michailina. "Stability properties of stochastic differential equations driven by Lévy noise." Thesis, University of Sheffield, 2009. http://etheses.whiterose.ac.uk/15019/.

Повний текст джерела

Анотація:

The main aim of this thesis is to examine stability properties of the solutions to stochastic differential equations (SDEs) driven by Levy noise. Using key tools such as Ito's formula for general semimartingales, Kunita's moment estimates for Levy-type stochastic integrals, and the exponential martingale inequality, we find conditions under which the solutions to the SDEs under consideration are stable in probability, almost surely and moment exponentially stable. In addition, stability properties of stochastic functional differential equations (SFDEs) driven by Levy noise are examined using Razumikhin type theorems. In the existing literature the problem of stochastic stabilization and destabilization of first order non-linear deterministic systems has been investigated when the system is perturbed with Brownian motion. These results are extended in this thesis to the case where the deterministic system is perturbed with Levy noise. We mainly focus on the stabilizing effects of the Levy noise in the system, prove the existence of sample Lyapunov exponents of the trivial solution of the stochastically perturbed system, and provide sufficient criteria under which the system is almost surely exponentially stable. From the results that are established the Levy noise plays a similar role to the Brownian motion in stabilizing dynamical systems. We also establish the variation of constants formula for linear SDEs driven by Levy noise. This is applied to study stochastic stabilization of ordinary functional differential equation systems perturbed with Levy noise.

Стилі APA, Harvard, Vancouver, ISO та ін.

Wang, Shaokang Jerry. "Analysis of Stability and Noise in Passively Modelocked Comb Lasers." Thesis, University of Maryland, Baltimore County, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10840412.

Повний текст джерела

Анотація:

The search for robust, low-noise modelocked comb sources has attracted significant attention during the last two decades. Passively modelocked fiber lasers are among the most attractive comb sources. The most important design problems for a passively modelocked laser include: (1) finding a region in the laser’s adjustable parameter space where it operates stably, (2) optimizing the pulse profile within that region, and (3) lowering the noise level. Adjustable parameters will typically include the cavity length, the pump power, and the amplifier gain, which may be a function of the pump power, the pump wavelength, and both the material and geometry of the gain medium.

There are two basic computational approaches for modeling passively modelocked laser systems: the evolutionary approach and the dynamical approach. In the evolutionary approach, which replicates the physical behavior of the laser, one launches light into the simulated laser and follows it for many round trips in the laser. If one obtains a stationary or periodically-stationary modelocked pulse, the laser is deemed stable and, if no such pulse is found, the laser is deemed unstable. The effect of noise can be studied by using a random number generator to add computational noise. In the dynamical approach, one first obtains a single modelocked pulse solution either analytically or by using the evolutionary approach. Next, one finds the pulse parameters as the laser parameters vary by solving a root-finding algorithm. One then linearizes the evolution equations about the steady-state solution and determines the eigenvalues of the linearized equation, which we refer to as the equation’s dynamical spectrum. If any eigenvalue has a positive real part, then the modelocked pulse is unstable. The effect of noise can be determined by calculating the noise that enters each of the modes in the dynamical spectrum, whose amplitudes are described by either a Langevin process or a random walk process.

The evolutionary approach is intuitive and straightforward to program, and it is widely used. However, it is computationally time-consuming to determine the stable operating regions and can give ambiguous results near a stability boundary. When evaluating the noise levels, Monte Carlo simulations, which are based upon the evolutionary approach, are often prohibitively expensive computationally. By comparison, the dynamical approach is more difficult to program, but it is computationally rapid, yields unambiguous results for the stability, and avoids computationally expensive Monte Carlo simulations. The two approaches are complementary to each other. However, the dynamical approach can be a powerful tool for system design and optimization and has historically been undertilized.

In this dissertation, we discuss the dynamical approach that we have developed for design and optimization of passively modelocked laser systems. This approach provides deep insights into the instability mechanisms of the laser that impact or limit modelocking, and makes it possible to rapidly and unambiguously map out the regions of stable operation in a large parameter space. For a given system setup, we can calculate the noise level in the laser cavity within minutes on a desktop computer.

Compared to Monte Carlo simulations, we will show that the dynamical approach improves the computational efficiency by more than three orders of magnitude. We will apply the dynamical approach to a laser with a fast saturable absorber and to a laser with a slow saturable absorber. We apply our model of a laser with a slow saturable absorber to a fiber comb laser with a semiconductor absorbing mirror (SESAM) that was developed at National Institute of Standards and Technology (NIST), Boulder, CO. We optimize its parameters and show that it is possible to increase its output power and bandwidth while lowering the pump power that is needed.

Стилі APA, Harvard, Vancouver, ISO та ін.

Lanaria, Lois. "The Effects of Vibratory Noise on Responses to Postural Stability." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/203894.

Повний текст джерела

Анотація:

Bioengineering
M.S.
Our human balance system is critical for preventing falls. The system consists of a complex set of sensorimotor controls that includes integration of sensory inputs including sight, touch and vestibular to produce motor output. Tactile afferents from the plantar surface contribute to the human balance and movement control system. Loss of sensory information could lead to impaired balance primarily because of impaired detection of changes in upright position, delayed postural reflexes, or failure to realize how far one's center of mass has been displaced thus increasing the probability of falls. Somatosensory and visual information must be integrated to interpret complex sensory environment. Sensory pathways that are simultaneously feeding inputs into the system exhibit non-linear behavior and it is unlikely that the role of a single pathway can be characterized in a static environment. As the sensory environment changes, the need to re-weight the relative dependence on each senses is essential for maintaining stability. Thus, attention also plays an important role in postural control. Attention can be defined as the individual's capacity for information processing. Performing two or more tasks at the same time may require more than an individual's attention capacity and thereby may weaken performance in the other task. Stochastic resonance phenomena has been shown to enhance sensory information processing and perception. This series of studies sought to analyze the effects of vibrotactile noise on human postural responses using a sub-threshold vibration (SV) and above-threshold vibration (AV). The vibrotactile noise was applied at the soles of both feet with six DC vibrator disks embedded in open-type footwear. Twenty one healthy adults wearing the vibrating footwear stood quietly on a compliant surface for 90 seconds inside a three-wall virtual environment. The visual conditions were either eyes closed, eyes open or a continuous visual flow field in a pitch-up direction at constant velocity of 30°/sec. A dual task paradigm was presented as a computation task, the Fibonacci sequence. The first 30 seconds of the 90 seconds trial had no vibration followed by 30 seconds of either sub-threshold or above-threshold vibration. Vibration was removed for the final 30 seconds. Root mean squares (RMS) and approximate entropy (ApEn) of center of mass (COM) and center of pressure (COP) excursions were calculated in the anterior-posterior (AP) and medio-lateral (ML) directions for each 30 second time period and normalized to each subject's initial position. Approximate entropy (ApEn) was used to detect movement variability in a time series to determine the unpredictability of the postural responses. COP and COM data were tested for statistical significance using repeated measures analysis of variance (ANOVA) with within-subject factors of vision (3 levels: eyes closed, eyes open and pitch-up), task (2 levels: single task and dual task), and vibration level (2 levels: sub-threshold vibration and above-threshold vibration) at a 95% confidence level (p<0.05). Results supported the hypothesis that the application of SV and AV affected COP regularity and variability differently when subjected to different visual conditions (eyes closed, eyes open and pitch-up). COM randomness increased (higher ApEn) when attention was diverted from postural control which is in agreement with previous studies. The decrease in COM AP randomness (lower ApEn) with vibration suggested that the application of vibration increased the amount of attention invested in postural control or balance when performing an attention demanding cognitive task. The SV increased the COP-AP regularity (lower ApEn) during eyes-closed and eyes-open conditions while AV increased COP-AP variability (increased RMS) during the pitch-up visual condition. In conclusion, posture and balance were affected by the application of vibration noise. The vibration noise enhanced the amount of attention invested in postural control while performing an attention demanding cognitive task and sensory-motor learning was achieved by increasing COM sway structure regularity (lower ApEn) but not the sway magnitude. These results suggest that the interaction between vibration noise and an attention demanding task resulted in the temporal re-structuring of the postural control system without affecting the equilibrium region for the COM sway excursion. Vibration noise appears to facilitate postural control by altering postural response regularity (lower ApEn). For COM, only postural response regularity but not sway variability was affected by vibration noise in relation to vision regardless of the vibration level (SV or AV). For COP postural responses, the effect of SV and AV differs. Due to the perception of self-motion from the pitch-up visual condition, COP postural response most likely arise from cortical level. Since AV only affected COP responses during pitch-up visual condition and not SV, this study suggests that AV applied affected the cortical level of postural control. Effects of SV on postural responses between the eyes-open and eyes-closed vision conditions suggests that SV may affect a subcortical level of postural control. Understanding the effects and mechanism of vibratory noise may help in the design of effective interventions to prevent falls and rehabilitation. These results provide the scientific basis for development of a SR-based rehabilitation device for people with sensory information and processing deficiency as occurs with aging or stroke. The finding of after effects of vibratory noise can be used to determine dosage of vibrotactile stimulation in the design of vibrating footwear.
Temple University--Theses

Стилі APA, Harvard, Vancouver, ISO та ін.

Wan, Kin Wa. "Advanced numerical and digital techniques in frequency stability analysis." Thesis, University of Portsmouth, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237843.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ho, Yenpo. "Dynamic stability margin analysis on SRAM." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2722.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Книги з теми "Stability to noise"

Rubiola, Enrico. Phase noise and frequency stability in oscillators. New York: Cambridge University Press, 2008.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

M, Seiner John, Tiwari S. N, and Langley Research Center, eds. Nonlinear stability of supersonic jets. Hampton, Va: NASA Langley Research Center, 1995.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Loecher, Markus. Noise sustained patterns: Fluctuations and nonlinearities. Singapore: World Scientific, 2004.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bhatt, R. S. Nonlinear stability of supersonic jets. Hampton, Va: NASA Langley Research Center, 1995.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

W, Lawrence R., and Langley Research Center, eds. Noise diode stability measurements using a 4.3 GHz laboratory radiometer. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

N, Tiwari S., Old Dominion University. Research Foundation., and United States. National Aeronautics and Space Administration., eds. Nonlinear stability of supersonic jets: Final report. Norfolk, Va: Dept. of Mechanical Engineering, College of Engineering & Technology, Old Dominion University, 1996.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Krishnan, Radhakrishnan, Oyediran Ayo, and United States. National Aeronautics and Space Administration., eds. Combustion noise at elevated pressures in a liquid-fueled premixed combustor. [Washington, DC]: National Aeronautics and Space Administration, 1997.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

1934-, Hall J. L., Ye Jun 1967-, and Society of Photo-optical Instrumentation Engineers., eds. Laser frequency stabilization, standards, measurement, and applications: 24-26 January, 2001, San Jose, USA. Bellingham, Wash: SPIE, 2001.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Steinert, Richard. Effect of Noise on a Model Thermoacoustic System at its Stability Boundary. Wiesbaden: Springer Fachmedien Wiesbaden, 2016. http://dx.doi.org/10.1007/978-3-658-13823-3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Leahy, John. On asset market behaviour: The implications and evolutionary stability of noise trading. [s.l.]: typescript, 1989.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Частини книг з теми "Stability to noise"

Mankbadi, Reda R. "Linear Stability Theory." In Transition, Turbulence, and Noise, 21–49. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2744-2_2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Roy, Sisir, and Sarangam Majumdar. "Developmental Noise and Stability." In Noise and Randomness in Living System, 119–24. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9583-4_12.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Peres, Yuval. "Noise Stability of Weighted Majority." In Progress in Probability, 677–82. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60754-8_27.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Tsirelson, Boris. "Boris Tsirelson: Scaling Limit, Noise, Stability." In Lecture Notes in Mathematics, 1–106. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-39982-7_1.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Gorban, Igor I. "Statistical Stability of Different Types of Noise and Process." In The Statistical Stability Phenomenon, 111–18. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43585-5_8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Kolner, Brian H. "Noise and Stability in Modelocked Soliton Lasers." In Encyclopedia of Complexity and Systems Science, 6116–75. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-30440-3_360.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Enginol, Turan B. "Nonlinear Reactor Stability Analysis with Arbitrary Feedback." In Noise and Nonlinear Phenomena in Nuclear Systems, 439–50. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-5613-4_34.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Azizi, Aydin, and Poorya Ghafoorpoor Yazdi. "Noise Control Techniques." In Computer-Based Analysis of the Stochastic Stability of Mechanical Structures Driven by White and Colored Noise, 61–73. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6218-7_5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Veroňková, Jitka, and Zdena Palková. "Perception of Czech in Noise: Stability of Vowels." In Cross-Modal Analysis of Speech, Gestures, Gaze and Facial Expressions, 149–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03320-9_15.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhang, Xin, Yiyuan Zheng, Yiming Gan, Wuneng Zhou, Yuqing Sun, and Lifei Yang. "Exponential Stability of Neural Network with General Noise." In Proceedings of 2018 Chinese Intelligent Systems Conference, 69–80. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2288-4_8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Stability to noise"

Wang, Xin, Long Zhao, Ru-Jia Qiu, and Yu Wang. "Design and Analysis of High Stability, Low Noise Current Source." In 2024 4th International Conference on Electronics, Circuits and Information Engineering (ECIE), 6–9. IEEE, 2024. http://dx.doi.org/10.1109/ecie61885.2024.10626787.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

RAFAELY, B., and SJ ELLIOTT. "ADAPTIVE INTERNAL MODEL CONTROLLER - STABILITY ANALYSIS." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19299.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Chichigina, O. A., B. Spagnolo, D. Valenti, A. A. Dubkov, Massimo Macucci, and Giovanni Basso. "Stability under influence of noise with regulated periodicity." In NOISE AND FLUCTUATIONS: 20th International Conference on Noice and Fluctuations (ICNF-2009). AIP, 2009. http://dx.doi.org/10.1063/1.3140550.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Lieuwen, Tim, and Andrzej Banaszuk. "Background Noise Effects on Combustor Stability." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30062.

Повний текст джерела

Анотація:

This paper considers the effects of background turbulent fluctuations upon a combustor’s stability boundaries. Inherent turbulent fluctuations act as both additive and parametric (also called multiplicative) excitation sources to acoustic waves in combustors. While additive noise sources exert primarily quantitative effects upon combustor oscillations, parametric noise sources can exert qualitative impacts upon its dynamics; particularly of interest here is their ability to destabilize a “nominally” stable system. The significance of these parametric noise sources increases with increased background noise levels and, thus, may play more of a role in realistic, high Reynolds number systems than experiments on simplified, lab scale combustors might suggest. The objective of this paper is to determine whether and/or when these effects might be significant. The analysis considers the effects of fluctuations in damping rate, frequency and combustion response. It is found that the effects of noisy damping and frequency upon the combustor’s stability limits is quite small, at least for the fluctuation intensities estimated here. The effects of a noisy combustion response, particularly of a fluctuating time delay between flow and heat release perturbations, can be quite significant, however, in some cases for turbulence intensities as low as <(u′/u¯)2>1/2∼5–10%. These results suggest that deterministic stability models calibrated on low turbulence intensity, lab scale combustors may not adequately describe the stability limits of realistic, highly turbulent combustors.

Стилі APA, Harvard, Vancouver, ISO та ін.

Vavriv, D. M. "Chaos and stability of microwave circuits." In Noise in physical systems and 1/. AIP, 1993. http://dx.doi.org/10.1063/1.44615.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

SWANSON, DC. "ENVIRONMENTAL AND TRANSDUCTION EFFECTS ON CLOSED-LOOP STABILITY IN ACTIVE HEARING PROTECTORS." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19351.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Limei, Zhang, Huang YiLiang, Cheng Yong, Wu Bo, and Qiao Xinqi. "On Combustion Noise and Working Stability of 6130Q Diesel Engine." In Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1991. http://dx.doi.org/10.4271/911072.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Suarez, Almudena. "Stability and phase-noise analysis." In 2022 52nd European Microwave Conference (EuMC). IEEE, 2022. http://dx.doi.org/10.23919/eumc54642.2022.9991869.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ryashko, L. B. "Stability of Oscillations for Dynamic Systems Under the Random Parametrical Fluctuations." In NOISE AND FLUCTUATIONS: 19th International Conference on Noise and Fluctuations; ICNF 2007. AIP, 2007. http://dx.doi.org/10.1063/1.2759728.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Dubkov, Alexander A. "Noise Enhanced Stability Phenomenon in 2-D Potential with Radial Symmetry." In NOISE AND FLUCTUATIONS: 19th International Conference on Noise and Fluctuations; ICNF 2007. AIP, 2007. http://dx.doi.org/10.1063/1.2759737.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Stability to noise"

Bernstein, Dorel. A HIGH STABILITY, LOW NOISE RF DISTRIBUTION SYSTEM. Office of Scientific and Technical Information (OSTI), August 2002. http://dx.doi.org/10.2172/800031.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Pinsky, Mark A., and Elton P. Hsu. Stability of Dynamical Systems in the Presence of Noise. Fort Belvoir, VA: Defense Technical Information Center, November 1993. http://dx.doi.org/10.21236/ada275383.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Whalen, Michael R. Analysis of Femtosecond Timing Noise and Stability in Microwave Components. Office of Scientific and Technical Information (OSTI), June 2011. http://dx.doi.org/10.2172/1017210.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Towne, Nathan. Bunch and RF System Stability and RF Noise in NSLS-II. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/1525424.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Serakos, Demetrios. PHALANX CIWS Control System Stability, Aim Bias Compensation, and Noise- Sensitivity. Fort Belvoir, VA: Defense Technical Information Center, May 1992. http://dx.doi.org/10.21236/ada264733.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

SOUND RADIATION OF ORTHOTROPIC STEEL DECKS SUBJECTED TO MOVING VEHICLE LOADS. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.052.

Повний текст джерела

Анотація:

Orthotropic steel decks (OSDs) are widely used in the construction of steel bridges due to their high bearing capacity and low material consumption. Current investigations into OSDs mainly focus on issues associated with static, stability, fatigue, etc. However, from the perspective of dynamics, structures with low dead loads may be susceptible to excessive vibration and noise, which occurs when shocks caused by moving traffic loads are transferred to the bridge deck and other components. Hence, bridge vibration and the associated noise are critical issues in steel bridges. This paper investigates the vibration and noise characteristics of OSDs under moving vehicle loads by using analytical method. First, the forced vibration response of the OSDs is solved by the Finite Element Method(FEM), and then the obtained response is used as the boundary condition of the OSDs boundary element model to solve the acoustic radiation. Finally, the variation rules of the vibration and sound radiation of the OSDs are analyzed when the load parameters, boundary conditions and structural parameters are changed. The results show that when analyzing the high-frequency vibration and noise of the OSDs, the all-shell-element model should be selected. The high frequency part of vibration and sound pressure of the OSDs is greater than the low frequency part under moving load. Increasing the load speed will increase the low-frequency part of vibration and sound pressure, but increasing the load eccentricity will have the opposite result. Strengthening the boundary constraints and increasing the number of ribs will suppress the vibration and reduce the sound pressure.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!