Articoli di riviste: "Homogeneous feedback"

1

Hermes, Henry. "Homogeneous feedback controls for homogeneous systems". Systems & Control Letters 24, n. 1 (gennaio 1995): 7–11. http://dx.doi.org/10.1016/0167-6911(94)00035-t.

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2

Hanan, Avi, Adam Jbara e Arie Levant. "Homogeneous Output-Feedback Control". IFAC-PapersOnLine 53, n. 2 (2020): 5081–86. http://dx.doi.org/10.1016/j.ifacol.2020.12.1119.

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3

Moulay, Emmanuel. "Stabilization via homogeneous feedback controls". Automatica 44, n. 11 (novembre 2008): 2981–84. http://dx.doi.org/10.1016/j.automatica.2008.05.003.

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4

Hermes, H. "Smooth homogeneous asymptotically stabilizing feedback controls". ESAIM: Control, Optimisation and Calculus of Variations 2 (1997): 13–32. http://dx.doi.org/10.1051/cocv:1997101.

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5

Iggidr, A., e R. Outbib. "Feedback Stabilization of Homogeneous Polynomial Systems". IFAC Proceedings Volumes 28, n. 14 (giugno 1995): 137–41. http://dx.doi.org/10.1016/s1474-6670(17)46820-0.

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6

Grüne, Lars. "Homogeneous State Feedback Stabilization of Homogenous Systems". SIAM Journal on Control and Optimization 38, n. 4 (gennaio 2000): 1288–308. http://dx.doi.org/10.1137/s0363012998349303.

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7

Cruz-Zavala, Emmanuel, Emmanuel Nuño e Jaime A. Moreno. "Non-homogeneous observer-based-output feedback scheme for the double integrator". Memorias del Congreso Nacional de Control Automático 5, n. 1 (17 ottobre 2022): 268–73. http://dx.doi.org/10.58571/cnca.amca.2022.071.

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Abstract (sommario):

In this paper we propose a non-homogeneous observer-based-output feedback scheme for the double integrator system. The control scheme is composed by two non-homogeneous structures. It resembles a non-homogeneous state feedback controller, where the unmeasurable state is replaced by the that provided by a non-homogeneous observer. Compared to other reported schemes, the closed-loop system is not homogeneous of negative degree, so it is not possible to use the results established for homogeneous systems. To overcome this problem, the finite-time stability analysis is carried out by means of (local) strict Lyapunov functions.

8

Chai, Lin. "Global Output Control for a Class of Inherently Higher-Order Nonlinear Time-Delay Systems Based on Homogeneous Domination Approach". Discrete Dynamics in Nature and Society 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/180717.

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Abstract (sommario):

This paper addresses the problem of global output feedback stabilization for a class of inherently higher-order uncertain nonlinear systems subject to time-delay. By using the homogeneous domination approach, we construct a homogeneous output feedback controller with an adjustable scaling gain. With the aid of a homogeneous Lyapunov-Krasovskii functional, the scaling gain is adjusted to dominate the time-delay nonlinearities bounded by homogeneous growth conditions and render the closed-loop system globally asymptotically stable. In addition, we also show that the proposed approach is applicable for time-delay systems under nontriangular growth conditions.

9

Mori, Kazuyoshi, e Kenichi Abe. "Feedback Stabilization Over Commutative Rings Using Homogeneous Images". IFAC Proceedings Volumes 31, n. 19 (luglio 1998): 117–22. http://dx.doi.org/10.1016/s1474-6670(17)41138-4.

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10

Andrieu, Vincent, Laurent Praly e Alessandro Astolfi. "Homogeneous Approximation, Recursive Observer Design, and Output Feedback". SIAM Journal on Control and Optimization 47, n. 4 (gennaio 2008): 1814–50. http://dx.doi.org/10.1137/060675861.

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11

Alimhan, Keylan, Naohisa Otsuka, M. N. Kalimoldayev e N. Tasbolat. "Practical output tracking for a class of uncertain nonlinear time-delay systems via state feedback". MATEC Web of Conferences 189 (2018): 10027. http://dx.doi.org/10.1051/matecconf/201818910027.

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Abstract (sommario):

In this paper, the problem of global practical output tracking is investigated by state feedback for a class of uncertain nonlinear time-delay systems. Under mild conditions on the system nonlinearities involving time delay, we construct a homogeneous state feedback controller with an adjustable scaling gain. By a homogeneous Lyapunov-Krasovskii functional, the scaling gain is adjusted to dominate the time-delay nonlinearities bounded by homogeneous growth conditions and render the tracking error can be made arbitrarily small while all the states of the closed-loop system remain to be bounded.

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Tasbolatuly, N., A. K. Yerdenova, A. E. Nazyrova, G. B. Bakhadirova e S. S. Alisheva. "Global Practical Output Tracking for a Class of Uncertain Nonlinear Systems". Bulletin of the National Engineering Academy of the Republic of Kazakhstan 91, n. 1 (15 marzo 2024): 121–36. http://dx.doi.org/10.47533/2024.1606-146x.13.

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Abstract (sommario):

This paper addresses the problem of global practical output control using output feedback for a class of uncertain nonlinear systems with time-varying delay. First, a homogeneous output feedback controller is designed for a nominally uncertain system by adding power integrator technology. Then, with the help of an appropriate Lyapunov-Krasovsky functional and a reduced-order observer, using the homogeneous dominance approach and adding a power integrator method, an output feedback controller is successfully designed to ensure that all states of the closed-loop system remain constrained while simultaneously making the tracking error arbitrarily small.

13

Timoshin, S. N., e J. M. Linkins. "Transient feedback and global instability in non-homogeneous systems". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 363, n. 1830 (20 aprile 2005): 1235–45. http://dx.doi.org/10.1098/rsta.2005.1563.

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Model examples of linear wave systems are considered to illustrate the origin of feedback instability in situations involving strong transients. Two mechanisms of transient growth are addressed. The first is a spatial amplification of resonant waves propagating in the same direction. The second form of transient growth is purely temporal. It is found that under certain conditions, both forms of transients can trigger global instability in a non-homogeneous system.

14

Blanchini, Franco, Christian Cuba Samaniego, Elisa Franco e Giulia Giordano. "Homogeneous Time Constants Promote Oscillations in Negative Feedback Loops". ACS Synthetic Biology 7, n. 6 (20 aprile 2018): 1481–87. http://dx.doi.org/10.1021/acssynbio.7b00442.

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15

Grüne, Lars, e Fabian Wirth. "Feedback stabilization of discrete-time homogeneous semi-linear systems". Systems & Control Letters 37, n. 1 (maggio 1999): 19–30. http://dx.doi.org/10.1016/s0167-6911(98)00110-8.

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16

Alimhan, Keylan, Orken Mamyrbayev, Abilmazhin Adamov, Sandugash Alisheva e Dina Oralbekova. "Global Practical Output Tracking for a Class of Uncertain Inherently Time-Varying Delay Nonlinear Systems by Output Feedback". Computation 10, n. 10 (13 ottobre 2022): 187. http://dx.doi.org/10.3390/computation10100187.

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Abstract (sommario):

This article addresses the problem of global practical output tracking by output feedback for a class of uncertain inherently time-varying delay nonlinear systems. Firstly, a homogeneous output-feedback controller is designed for the nominal uncertain inherently system by virtue of adding a power integrator technique. Then, with the help of an appropriate Lyapunov–Krasovskii functional and reduced-order observer, by using the homogeneous domination approach and adding a power integrator method, an output-feedback controller is successfully developed to guarantee all the states of the closed-loop system remain bounded and simultaneously making the tracking error arbitrarily small. The simulation results of an example verify the proposed approach.

17

Kadiev, P. A., K. K. Nazarov e Z. G. Kardashova. "Formation of streams of binary sequences with controlled structure of "cellular" automata in homogeneous register environments". Herald of Dagestan State Technical University. Technical Sciences 48, n. 4 (11 febbraio 2022): 90–99. http://dx.doi.org/10.21822/2073-6185-2021-48-4-90-99.

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Abstract (sommario):

Objective. Development of a method for organizing the process of forming flows register structure, patented by the author at the Department of DSTU, which is a cellular automaton of binary sequences with a controlled structure of "cellular" automata in homogeneous register environments. Method. To solve the set system problem, a process model was built in order to determine the factors that allow changing the sequence of flow elements. Result. When studying the most common generators of pseudo-random streams based on linear register media with modulo two adders in feedback circuits, which are "cellular" automata, it was established from the tables of environment states that the factors determining the structure of the generated streams of binary sequences are the sequence of states , are the initial state of the register of a homogeneous medium and the feedback structure determined by the transition function of the cellular automaton. Conclusion. It is shown that by varying the initial state of the cellular automaton and the structure of feedbacks as control tools, it seems possible to form binary pseudo-random streams of states with different structures, different order of flow elements, bringing their characteristics closer to random ones. Examples of the implementation of the flow structure control process are given, confirming this assumption. A typical structure of a stream shaper with a managed structure based on a homogeneous one is given.

18

Liu, W., e M. Krstic. "Boundary feedback stabilization of homogeneous equilibria in unstable fluid mixtures". International Journal of Control 80, n. 6 (giugno 2007): 982–89. http://dx.doi.org/10.1080/00207170701280895.

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19

Colbaugh, R., e K. Glass. "Stabilization of Nonholonomic Robotic Systems Using Adaptation and Homogeneous Feedback". IFAC Proceedings Volumes 31, n. 17 (luglio 1998): 315–20. http://dx.doi.org/10.1016/s1474-6670(17)40354-5.

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20

M'Closkey, R. T., e R. M. Murray. "Exponential stabilization of driftless nonlinear control systems using homogeneous feedback". IEEE Transactions on Automatic Control 42, n. 5 (maggio 1997): 614–28. http://dx.doi.org/10.1109/9.580865.

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21

Lo, Ji-Chang, e Chengwei Lin. "Polynomial Fuzzy Observed-State Feedback Stabilization via Homogeneous Lyapunov Methods". IEEE Transactions on Fuzzy Systems 26, n. 5 (ottobre 2018): 2873–85. http://dx.doi.org/10.1109/tfuzz.2017.2786211.

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22

Ericksen, Hayley M., Phillip A. Gribble, Kate R. Pfile e Brian G. Pietrosimone. "Different Modes of Feedback and Peak Vertical Ground Reaction Force During Jump Landing: A Systematic Review". Journal of Athletic Training 48, n. 5 (1 ottobre 2013): 685–95. http://dx.doi.org/10.4085/1062-6050-48.3.02.

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Abstract (sommario):

Context: Excessive ground reaction force when landing from a jump may result in lower extremity injuries. It is important to better understand how feedback can influence ground reaction force (GRF) and potentially reduce injury risk. Objective: To determine the effect of expert-provided (EP), self-analysis (SA), and combination EP and SA (combo) feedback on reducing peak vertical GRF during a jump-landing task. Data Sources: We searched the Web of Science database on July 1, 2011; using the search terms ground reaction force, landing biomechanics, and feedback elicited 731 initial hits. Study Selection: Of the 731 initial hits, our final analysis included 7 studies that incorporated 32 separate data comparisons. Data Extraction: Standardized effect sizes and 95% confidence intervals (CIs) were calculated between pretest and posttest scores for each feedback condition. Data Synthesis: We found a homogeneous beneficial effect for combo feedback, indicating a reduction in GRF with no CIs crossing zero. We also found a homogeneous beneficial effect for EP feedback, but the CIs from 4 of the 10 data comparisons crossed zero. The SA feedback showed strong, definitive effects when the intervention included a videotape SA, with no CIs crossing zero. Conclusions: Of the 7 studies reviewed, combo feedback seemed to produce the greatest decrease in peak vertical GRF during a jump-landing task.

23

Liu, Xiaohua, e Wuquan Li. "Stability of a Class of Stochastic Nonlinear Systems with Markovian Switching". Mathematical Problems in Engineering 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/292794.

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Abstract (sommario):

This paper investigates the stability of a class of stochastic nonlinear systems with Markovian switching via output-feedback. Based on the backstepping design method and homogeneous domination technique, an output-feedback controller is constructed to guarantee that the closed-loop system has a unique solution and is almost surely asymptotically stable. The efficiency of the output-feedback controller is demonstrated by a simulation example.

24

Liu, Liang, e Ming Gao. "State Feedback Control for Stochastic Feedforward Nonlinear Systems". Mathematical Problems in Engineering 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/908459.

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Abstract (sommario):

This paper considers the state feedback stabilization problem for a class of stochastic feedforward nonlinear systems. By using the homogeneous domination approach, a state feedback controller is constructed to render the closed-loop system globally asymptotically stable in probability. A simulation example is provided to show the effectiveness of the designed controller.

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Bonachela, Juan A., Robert M. Pringle, Efrat Sheffer, Tyler C. Coverdale, Jennifer A. Guyton, Kelly K. Caylor, Simon A. Levin e Corina E. Tarnita. "Termite mounds can increase the robustness of dryland ecosystems to climatic change". Science 347, n. 6222 (5 febbraio 2015): 651–55. http://dx.doi.org/10.1126/science.1261487.

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Self-organized spatial vegetation patterning is widespread and has been described using models of scale-dependent feedback between plants and water on homogeneous substrates. As rainfall decreases, these models yield a characteristic sequence of patterns with increasingly sparse vegetation, followed by sudden collapse to desert. Thus, the final, spot-like pattern may provide early warning for such catastrophic shifts. In many arid ecosystems, however, termite nests impart substrate heterogeneity by altering soil properties, thereby enhancing plant growth. We show that termite-induced heterogeneity interacts with scale-dependent feedbacks to produce vegetation patterns at different spatial grains. Although the coarse-grained patterning resembles that created by scale-dependent feedback alone, it does not indicate imminent desertification. Rather, mound-field landscapes are more robust to aridity, suggesting that termites may help stabilize ecosystems under global change.

26

Seeber, Richard, e Jaime A. Moreno. "Performance Preserving Integral Extension of Linear and Homogeneous State-Feedback Controllers". IFAC-PapersOnLine 53, n. 2 (2020): 5129–34. http://dx.doi.org/10.1016/j.ifacol.2020.12.1150.

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27

Janosek, Michal, Pavel Ripka, Frank Ludwig e Meinhard Schilling. "Single-core fluxgate gradiometer with simultaneous gradient and homogeneous feedback operation". Journal of Applied Physics 111, n. 7 (aprile 2012): 07E328. http://dx.doi.org/10.1063/1.3676238.

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Bartosiewicz, Zbigniew, Juri Belikov, Ülle Kotta e Małgorzata Wyrwas. "State feedback linearization of nonlinear control systems on homogeneous time scales". Nonlinear Analysis: Hybrid Systems 31 (febbraio 2019): 69–85. http://dx.doi.org/10.1016/j.nahs.2018.08.002.

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29

Jiao, Qiang, Hamidreza Modares, Frank L. Lewis, Shengyuan Xu e Lihua Xie. "Distributed L2-gain output-feedback control of homogeneous and heterogeneous systems". Automatica 71 (settembre 2016): 361–68. http://dx.doi.org/10.1016/j.automatica.2016.04.025.

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30

Zhang, Junfeng, Zhengzhi Han e Jun Huang. "Homogeneous feedback design of differential inclusions based on control Lyapunov functions". Communications in Nonlinear Science and Numerical Simulation 18, n. 10 (ottobre 2013): 2790–800. http://dx.doi.org/10.1016/j.cnsns.2013.03.015.

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31

Vanag, Vladimir K., Lingfa Yang, Milos Dolnik, Anatol M. Zhabotinsky e Irving R. Epstein. "Oscillatory cluster patterns in a homogeneous chemical system with global feedback". Nature 406, n. 6794 (luglio 2000): 389–91. http://dx.doi.org/10.1038/35019038.

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32

Baier, Gerold, e Sven Sahle. "Homogeneous and Spatio-temporal Chaos in Biochemical Reactions With Feedback Inhibition". Journal of Theoretical Biology 193, n. 2 (luglio 1998): 233–42. http://dx.doi.org/10.1006/jtbi.1998.0695.

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33

Zhang, Junfeng, Zhengzhi Han e Jun Huang. "Homogeneous Feedback Control of Nonlinear Systems Based on Control Lyapunov Functions". Asian Journal of Control 16, n. 4 (29 agosto 2013): 1082–90. http://dx.doi.org/10.1002/asjc.770.

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34

Ma, Qian, Ticao Jiao e Guozeng Cui. "Output-Feedback Control for a Class of Stochastic High-Order Feedforward Nonlinear Systems with Delay". Mathematical Problems in Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/497231.

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Abstract (sommario):

The problem of global output-feedback stabilization for a class of stochastic high-order time-delay feedforward nonlinear systems with different power orders is investigated. By combining the adding one power integrator technique with the homogeneous domination approach, an output-feedback controller design is proposed, which ensures the global asymptotical stability in probability of the closed-loop system.

35

Liu, Jintong, Lin Yao Ye, Wei Hong Xiong, Tianrui Liu, Hong Yang e Jianping Lei. "A cerium oxide@metal–organic framework nanoenzyme as a tandem catalyst for enhanced photodynamic therapy". Chemical Communications 57, n. 22 (2021): 2820–23. http://dx.doi.org/10.1039/d1cc00001b.

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36

Sullivan, David, e Ilian T. Iliev. "Radiative Feedback Effects during Cosmic Reionization". Proceedings of the International Astronomical Union 11, S308 (giugno 2014): 372–77. http://dx.doi.org/10.1017/s174392131601019x.

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AbstractWe present coupled radiation hydrodynamical simulations of the epoch of reionization, aimed at probing self-feedback on galactic scales. Unlike previous works, which assume a (quasi) homogeneous UV background, we self-consistently evolve both the radiation field and the gas to model the impact of previously unresolved processes such as spectral hardening and self-shielding. We find that the characteristic halo mass with a gas fraction half the cosmic mean, Mc(z), a quantity frequently used in semi-analytical models of galaxy formation, is significantly larger than previously assumed. While this results in an increased suppression of star formation in the early Universe, our results are consistent with the extrapolated stellar abundance matching models from Moster et al. 2013.

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Liu, Liang, Shengyuan Xu, Xuejun Xie e Bing Xiao. "Further results on output-feedback stabilization of stochastic upper-triangular systems with state and input time-delays". Transactions of the Institute of Measurement and Control 40, n. 7 (11 maggio 2017): 2408–15. http://dx.doi.org/10.1177/0142331217705947.

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Abstract (sommario):

Based on stochastic time-delay system stability criterion and a homogeneous domination approach, the output-feedback stabilization problem for a class of more general stochastic upper-triangular systems with state and input time-delays has been solved in this paper. Firstly, the initial system is changed into an equivalent one with a designed scalar by introducing a set of coordinate transformations. After that, by designing an implementable homogeneous reduced-order observer, and tactfully selecting a suitable Lyapunov–Krasoviskii functional and a low gain scale, a delay-independent output-feedback controller is explicitly constructed. Finally, the globally asymptotically stability in probability of the closed-loop system is ensured by rigorous proof. The simulation results demonstrate the efficiency of the proposed design scheme.

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Taylor, Jordan A., Laura L. Hieber e Richard B. Ivry. "Feedback-dependent generalization". Journal of Neurophysiology 109, n. 1 (1 gennaio 2013): 202–15. http://dx.doi.org/10.1152/jn.00247.2012.

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Generalization provides a window into the representational changes that occur during motor learning. Neural network models have been integral in revealing how the neural representation constrains the extent of generalization. Specifically, two key features are thought to define the pattern of generalization. First, generalization is constrained by the properties of the underlying neural units; with directionally tuned units, the extent of generalization is limited by the width of the tuning functions. Second, error signals are used to update a sensorimotor map to align the desired and actual output, with a gradient-descent learning rule ensuring that the error produces changes in those units responsible for the error. In prior studies, task-specific effects in generalization have been attributed to differences in neural tuning functions. Here we ask whether differences in generalization functions may arise from task-specific error signals. We systematically varied visual error information in a visuomotor adaptation task and found that this manipulation led to qualitative differences in generalization. A neural network model suggests that these differences are the result of error feedback processing operating on a homogeneous and invariant set of tuning functions. Consistent with novel predictions derived from the model, increasing the number of training directions led to specific distortions of the generalization function. Taken together, the behavioral and modeling results offer a parsimonious account of generalization that is based on the utilization of feedback information to update a sensorimotor map with stable tuning functions.

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Mitra, Sourav. "Stabilization of the non-homogeneous Navier–Stokes equations in a 2d channel". ESAIM: Control, Optimisation and Calculus of Variations 25 (2019): 66. http://dx.doi.org/10.1051/cocv/2019036.

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In this article, we study the local boundary stabilization of the non-homogeneous Navier–Stokes equations in a 2d channel around Poiseuille flow which is a stationary solution for the system under consideration. The feedback control operator we construct has finite dimensional range. The homogeneous Navier–Stokes equations are of parabolic nature and the stabilization result for such system is well studied in the literature. In the present article we prove a stabilization result for non-homogeneous Navier–Stokes equations which involves coupled parabolic and hyperbolic dynamics by using only one boundary control for the parabolic part.

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Wang, Xiangyu, Guipu Li, Shihua Li e Aiguo Song. "Finite-time output feedback control for a pneumatic servo system". Transactions of the Institute of Measurement and Control 38, n. 12 (13 ottobre 2016): 1520–34. http://dx.doi.org/10.1177/0142331216671389.

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In this paper, the position tracking control problem of pneumatic servo systems is investigated. These systems usually have high nonlinearities and unmeasurable piston velocities. Firstly, by using adding a power integrator technique, a global finite-time state feedback controller is proposed. Secondly, based on homogeneous theory, a nonlinear observer is developed to estimate the piston velocity. Finally, the corresponding output feedback controller is derived, which local finite-time stabilizes the position tracking error system. Compared with the conventional backstepping output feedback control scheme, the developed nonsmooth output feedback control scheme offers a faster convergence rate and a better disturbance rejection property. Numerical simulations illustrate the effectiveness of the proposed control scheme.

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Qin, Xiaoyan, e Huifang Min. "Further results on adaptive state feedback stabilization for a class of stochastic feedforward nonlinear systems with time delays". Transactions of the Institute of Measurement and Control 41, n. 1 (26 marzo 2018): 127–34. http://dx.doi.org/10.1177/0142331217752798.

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Abstract (sommario):

This paper further discusses the state feedback stabilization for stochastic high-order feedforward nonlinear systems with input time delay. By constructing the appropriate Lyapunov–Krasovskii functional, and using the variable transformation technique and the homogeneous domination idea, a state feedback controller is designed to ensure that the closed-loop system will be globally asymptotically stable in probability. Finally, an example is given to verify the effectiveness of the obtained analytical results.

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Adomavicius, Gediminas, Alok Gupta e Mochen Yang. "Designing Real-Time Feedback for Bidders in Homogeneous-Item Continuous Combinatorial Auctions". MIS Quarterly 43, n. 3 (1 gennaio 2019): 721–43. http://dx.doi.org/10.25300/misq/2019/14974.

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LIAW, DER-CHERNG, e YEW-WEN LIANG. "Feedback stabilization of nonlinear driftless systems with applications to homogeneous-type systems". International Journal of Systems Science 28, n. 2 (febbraio 1997): 173–82. http://dx.doi.org/10.1080/00207729708929376.

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Shayman, Mark A. "Homogeneous Indices, Feedback Invariants and Control Structure Theorem for Generalized Linear Systems". SIAM Journal on Control and Optimization 26, n. 2 (marzo 1988): 387–400. http://dx.doi.org/10.1137/0326022.

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45

Jerbi, Hamadi, e Aboubakry Ould Maaloum. "Feedback stabilization of homogeneous polynomial systems of odd degree in the plane". Systems & Control Letters 56, n. 9-10 (settembre 2007): 611–17. http://dx.doi.org/10.1016/j.sysconle.2007.04.002.

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46

Bartosiewicz, Zbigniew, Ülle Kotta, Maris Tõnso e Małgorzata Wyrwas. "Static state feedback linearization of nonlinear control systems on homogeneous time scales". Mathematics of Control, Signals, and Systems 27, n. 4 (4 settembre 2015): 523–50. http://dx.doi.org/10.1007/s00498-015-0150-5.

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47

Gabelica, Catherine, e Vitaliy Popov. "“One Size Does Not Fit All”: Revisiting Team Feedback Theories From a Cultural Dimensions Perspective". Group & Organization Management 45, n. 2 (18 marzo 2020): 252–309. http://dx.doi.org/10.1177/1059601120910859.

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Abstract (sommario):

Feedback is a critical component of teamwork regulation. Research underscores the importance of feedback processes for its effectiveness in teams and further notes how individual differences can affect these processes. Nonetheless, few have theorized on the cultural dimensions associated with feedback to specify how these can attenuate such processes. We contend that research can be advanced by specifying how cultural dimensions may shape individual perception and processing of feedback and team processing of feedback in homogeneous and heterogeneous teams with respect to cultural dimensions. To address this foundational question, we review and integrate the literature on feedback in teams and culture in teams by (a) incorporating the role of culture in team feedback models, (b) discussing how cultural dimensions could influence the perception and processing of feedback, and (c) highlighting important directions for future inquiries at the intersection of feedback and cultural theories. We discuss the links between cultural dimensions derived from the field of intercultural communication and feedback behaviors and processes and provide propositions concerning culturally informed differences in specific feedback responses at individual and team levels.

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Sun, Xixi, Haisheng Yu e Xiaoyu Xu. "State Feedback Stabilization for a Class of Upper-Triangular Stochastic Nonlinear Systems with Time-Varying Control Coefficients". Processes 10, n. 8 (26 luglio 2022): 1465. http://dx.doi.org/10.3390/pr10081465.

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Abstract (sommario):

The problem explored in this article concerns the stability of the state feedback control of the upper-triangular stochastic nonlinear systems whose control coefficients are time-varying. First, the state feedback control of the corresponding nominal system is carried out by utilizing the backstepping technique combined with the appropriate Lyapunov function. Then, low-gain homogeneous domination technology and the efficient coordinate transformation method are adopted to realize the state feedback control of the original system and ensure the global asymptotic stability (GAS) in probability of the system. Finally, an example is given to illustrate the feasibility and correctness of the method.

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Zhang, Jiafan, Yongxin Yuan e Hao Liu. "An Approach to Partial Quadratic Eigenvalue Assignment of Damped Vibration Systems Using Static Output Feedback". International Journal of Structural Stability and Dynamics 18, n. 01 (gennaio 2018): 1850012. http://dx.doi.org/10.1142/s0219455418500128.

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This paper addresses the problem of the partial eigenvalue assignment for second-order damped vibration systems by static output feedback. The presented method uses the combined acceleration, velocity and displacement output feedback and works directly on second-order system models without the knowledge of the unassigned eigenpairs. It allows the input and output matrices to be prescribed beforehand in a simple form. The real-valued spectral decomposition of the symmetric quadratic pencil is adopted to derive a homogeneous matrix equation of output feedback gain matrices that assure the no spillover eigenvalue assignment. The method is validated by some illustrative numerical examples.

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Liu, Yue, Miao Liu, Jingyun Hu, Jiajun Li e Xinping Zhang. "Mechanically Contacted Distributed-Feedback Optical Microcavity". Nanomaterials 12, n. 11 (31 maggio 2022): 1883. http://dx.doi.org/10.3390/nano12111883.

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We report a construction of distributed-feedback (DFB) optical microcavities, which is realized through mechanical contact between a high-quality planar thin film of a polymeric semiconductor and a large-area homogeneous nanograting. Using poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3] thiadiazol-4,8-diyl)] (F8BT) as the active medium for the planar layer, we achieve strong amplified spontaneous emission from such a microcavity with a low threshold. This not only simplifies largely the fabrication techniques for DFB microcavities, but also avoids the unexpected chemical interactions during solution processing between the organic semiconductors and the nanograting materials. Furthermore, high-quality polymer thin films with high surface smoothness and high thickness homogeneity are employed without any modulations for constructing the microcavities. This also suggests new designs of microcavity light-emitting diodes, or even for realizing electrically pumped polymer lasers, simply by metallizing the dielectric nanogratings as the electrodes.

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