Journal articles: 'Bistable'

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Liu, Tinghao, and Guangbo Hao. "Design of Deployable Structures by Using Bistable Compliant Mechanisms." Micromachines 13, no. 5 (April 19, 2022): 651. http://dx.doi.org/10.3390/mi13050651.

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A deployable structure can significantly change its geometric shape by switching lattice configurations. Using compliant mechanisms as the lattice units can prevent wear and friction among multi-part mechanisms. This work presents two distinctive deployable structures based on a programmable compliant bistable lattice. Several novel parameters are introduced into the bistable mechanism to better control the behaviour of bistable mechanisms. By adjusting the defined geometry parameters, the programmable bistable lattices can be optimized for specific targets such as a larger deformation range or higher stability. The first structure is designed to perform 1D deployable movement. This structure consists of multi-series-connected bistable lattices. In order to explore the 3D bistable characteristic, a cylindrical deployable mechanism is designed based on the curved double tensural bistable lattice. The investigation of bistable lattices mainly involves four types of bistable mechanisms. These bistable mechanisms are obtained by dividing the long segment of traditional compliant bistable mechanisms into two equal parts and setting a series of angle data to them, respectively. The experiment and FEA simulation results confirm the feasibility of the compliant deployable structures.

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Belforte, G., G. Eula, M. Martinelli, T. Raparelli, and V. Viktorov. "Bistable Fluidic Laminar Amplifiers for Optopneumatic Interfaces." Journal of Robotics and Mechatronics 15, no. 4 (August 20, 2003): 377–83. http://dx.doi.org/10.20965/jrm.2003.p0377.

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Properties such as intrinsic security, low switching power, and the possibility of fabricating interfaces such as optopneumatic interfaces without electrical parts have greatly increased interest in fluidic elements. In fluidic elements, an optical signal is converted to a pressure signal that, when appropriately amplified, commands power stages suitable for environments having the risk of explosion or electromagnetic interference. The operation and use of bistables based on the wall effect has been known among digital elements for some time, but this component has mainly been studied and applied in turbulent systems. We focus on the study and realization of a fluidic bistable amplifier operating in the laminar range and therefore switchable by extremely low control power.

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Li, G., and G. Chen. "A function for characterizing complete kinetostatic behaviors of compliant bistable mechanisms." Mechanical Sciences 5, no. 2 (December 12, 2014): 67–78. http://dx.doi.org/10.5194/ms-5-67-2014.

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Abstract. In this paper, a straightforward and accurate numerical modeling (a rational function called "tri-root bistable function") are proposed to represent the complete nonlinear bistable force-displacement characteristics. The rational function has a cubic polynomial numerator and quadratic polynomial denominator. With three different kinds of compliant bistable mechanisms, the tri-root bistable function is proved effective and accurate, and that it is capable of capturing the key features of a bistable kinetostatic curve accurately with fewer parameters. Then, for the classic fully-compliant bistable mechanism, six closed-form equations are presented and used to describe the relationships between the tri-root bistable function parameters and the mechanism's design parameters, which are achieved using a multi-variable nonlinear regression. The regression analysis is validated by nonlinear finite element analysis. Finally, a fully-compliant statically balanced mechanism consisting of three different classic fully-compliant bistable mechanisms is illustrated to show the capability of the proposed method in designing compliant multi-stable mechanisms.

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Enns, R. H., and S. S. Rangnekar. "Bistable Solitons." Physical Review Letters 57, no. 6 (August 11, 1986): 778. http://dx.doi.org/10.1103/physrevlett.57.778.

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Goldstein, Raymond E., Alain Goriely, Greg Huber, and Charles W. Wolgemuth. "Bistable Helices." Physical Review Letters 84, no. 7 (February 14, 2000): 1631–34. http://dx.doi.org/10.1103/physrevlett.84.1631.

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Kaplan, A. E. "Bistable Solitons." Physical Review Letters 55, no. 12 (September 16, 1985): 1291–94. http://dx.doi.org/10.1103/physrevlett.55.1291.

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Lynch, S., and Z. G. Bandar. "Bistable neuromodules." Nonlinear Analysis: Theory, Methods & Applications 63, no. 5-7 (November 2005): e669-e677. http://dx.doi.org/10.1016/j.na.2004.09.042.

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DUAN, FABING, DEREK ABBOTT, and QISHENG GAO. "EVALUATION OF BISTABLE SYSTEMS VERSUS MATCHED FILTERS IN DETECTING BIPOLAR PULSE SIGNALS." Fluctuation and Noise Letters 05, no. 02 (June 2005): L127—L142. http://dx.doi.org/10.1142/s0219477505002483.

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This paper presents a thorough evaluation of a bistable system versus a matched filter in detecting bipolar pulse signals. The detectability of the bistable system can be optimized by adding noise, i.e. the stochastic resonance (SR) phenomenon. This SR effect is also demonstrated by approximate statistical detection theory of the bistable system and corresponding numerical simulations. Furthermore, the performance comparison results between the bistable system and the matched filter show that (a) the bistable system is more robust than the matched filter in detecting signals with disturbed pulse rates, and (b) the bistable system approaches the performance of the matched filter in detecting unknown arrival times of received signals, with an especially better computational efficiency. These significant results verify the potential applicability of the bistable system in signal detection field.

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Jensen, Brian D., and Larry L. Howell. "Identification of Compliant Pseudo-Rigid-Body Four-Link Mechanism Configurations Resulting in Bistable Behavior." Journal of Mechanical Design 125, no. 4 (December 1, 2003): 701–8. http://dx.doi.org/10.1115/1.1625399.

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Bistable mechanisms, which have two stable equilibria within their range of motion, are important parts of a wide variety of systems, such as closures, valves, switches, and clasps. Compliant bistable mechanisms present design challenges because the mechanism’s energy storage and motion characteristics are strongly coupled and must be considered simultaneously. This paper studies compliant bistable mechanisms which may be modeled as four-link mechanisms with a torsional spring at one joint. Theory is developed to predict compliant and rigid-body mechanism configurations which guarantee bistable behavior. With this knowledge, designers can largely uncouple the motion and energy storage requirements of a bistable mechanism design problem. Examples demonstrate the power of the theory in bistable mechanism design.

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Jagtap, Abhilasha R., and Jan W. Brascamp. "Does Cortical Inhibition Explain the Correlation Between Bistable Perception Paradigms?" i-Perception 12, no. 3 (March 2021): 204166952110200. http://dx.doi.org/10.1177/20416695211020018.

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When observers view a perceptually bistable stimulus, their perception changes stochastically. Various studies have shown across-observer correlations in the percept durations for different bistable stimuli including binocular rivalry stimuli and bistable moving plaids. Previous work on binocular rivalry posits that neural inhibition in the visual hierarchy is a factor involved in the perceptual fluctuations in that paradigm. Here, in order to investigate whether between-observer variability in cortical inhibition underlies correlated percept durations between binocular rivalry and bistable moving plaid perception, we used center-surround suppression as a behavioral measure of cortical inhibition. We recruited 217 participants in a test battery that included bistable perception paradigms as well as a center-surround suppression paradigm. While we were able to successfully replicate the correlations between binocular rivalry and bistable moving plaid perception, we did not find a correlation between center-surround suppression strength and percept durations for any form of bistable perception. Moreover, the results from a mediation analysis indicate that center-surround suppression is not the mediating factor in the correlation between binocular rivalry and bistable moving plaids. These results do not support the idea that cortical inhibition can explain the between-observer correlation in mean percept duration between binocular rivalry and bistable moving plaid perception.

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Lee, R. H., and C. J. Heckman. "Bistability in Spinal Motoneurons In Vivo: Systematic Variations in Persistent Inward Currents." Journal of Neurophysiology 80, no. 2 (August 1, 1998): 583–93. http://dx.doi.org/10.1152/jn.1998.80.2.583.

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Lee, R. H. and C. J. Heckman. Bistability in spinal motoneurons in vivo: systematic variations in persistent inward currents. J. Neurophysiol. 80: 583–593, 1998. Bistable behavior in spinal motoneurons consists of self-sustained firing evoked by a brief period of input. However, not all motoneurons possess an equal capacity for bistable behavior. In the companion paper, we found that self-sustained firing was persistent for long periods only in motoneurons with low rheobases and slow axonal conduction velocities. High rheobase, fast conduction velocity motoneurons tend to be only partially bistable in that self-sustained firing lasts at most 1–2 s. The mechanisms underlying these differences between fully and partially bistable motoneurons were investigated by measuring their current voltage ( I-V) relationships in the decerebrate cat preparation after administration of the noradrenergic α1 agonist methoxamine. Slow (8 mV/s) triangular voltage commands were applied using the discontinuous single-electrode voltage-clamp technique. Both fully and partially bistable cells exhibited a region of negative I-V slope due to activation of a strong, persistent inward current. The peak amplitude of the total persistent inward current ( I PIC) was equally large in fully and partially bistable cells, but there were substantial differences in how I PIC was activated and deactivated. In fully bistable cells, the offset of I PIC on the descending phase of the triangular voltage command occurred at a substantially more hyperpolarized voltage then its onset on the rising phase. Thus the I-V function of fully bistable cells exhibited marked hysteresis. Partially bistable cells had significantly less hysteresis. The lack of hysteresis in partially bistable cells was due to a greater decay of I PIC with time than that seen in fully bistable cells. Furthermore, the range over which activation and deactivation of I PIC occurred was more depolarized in partially than in fully bistable cells. The I-V functions were compared with frequency-current ( F-I) functions from the same cells, the characteristics of which were presented in the companion paper. The strong onset-offset difference in I PIC in fully bistable cells corresponded to a similarly large hysteresis for the thresholds of their F-I functions. The reduced onset-offset difference for I PIC in partially bistable cells corresponded to a lack of hysteresis in F-I thresholds. Thus the properties of I PIC accounted for the main differences in the F-I behavior seen between fully and partially bistable cells.

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Lee, R. H., and C. J. Heckman. "Bistability in Spinal Motoneurons In Vivo: Systematic Variations in Rhythmic Firing Patterns." Journal of Neurophysiology 80, no. 2 (August 1, 1998): 572–82. http://dx.doi.org/10.1152/jn.1998.80.2.572.

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Lee, R. H. and C. J. Heckman. Bistability in spinal motoneurons in vivo: systematic variations in rhythmic firing patterns. J. Neurophysiol. 80: 572–582, 1998. In the presence of the monoamines serotonin and norepinephrine, spinal motoneurons can exhibit bistable behavior, in which a brief period of excitatory input evokes prolonged self-sustained firing. A brief inhibitory input returns the cell to the quiescent state. To determine whether motoneurons differ in their capacity for bistable behavior, intracellular recordings were obtained in the decerebrate cat preparation. To enhance the likelihood of encountering bistable behavior, the noradrenergic α1 agonist methoxamine was applied to the ventral surface of the cord. The capacity of the cells to produce bistable behavior was assessed from the duration of self-sustained firing evoked by a brief (1.5 s) excitatory synaptic input from muscle spindle Ia afferents. About 35% (17 of 49) of the cells produced steady self-sustained firing for >3 s and were considered fully bistable. The other 32 cells (∼65%) were partially bistable, with self-sustained firing lasting <3 s. Fully bistable cells tended to have lower current thresholds for spike initiation and slower axonal conduction velocities than did partially bistable cells. This suggests that fully bistable motoneurons innervate fatigue resistant muscle fibers. The frequency-current ( F-I) relations of the motoneurons were characterized with slow triangular current ramps. Fully bistable cells displayed an acceleration in firing rate immediately on initiation of rhythmic firing. The F-I gain after completion of the acceleration was positive. Fully bistable cells also displayed a hysteresis in the current level for firing threshold with the ascending threshold occurring at substantially higher current level than the descending one. Additionally, these current thresholds usually were centered about zero current, so that the ascending current threshold was positive while the descending current threshold was negative. This negative offset meant that fully bistable cells could exhibit tonic firing without depolarizing injected current. Partially bistable cells exhibited very different F-I characteristics. Firing rate acceleration was just as large as in fully bistable cells but did not occur until well above the current level needed to initiate rhythmic firing. F-I gain after acceleration was negative, there was little to no hysteresis between the ascending and descending firing thresholds, and both thresholds were above the zero current level. These properties of partially bistable cells suggest their functional role is in tasks requiring relatively brief, high forces. The low thresholds of fully bistable cells mean they will be readily recruited in low force tasks like posture, where their prolonged self-sustained firing would be advantageous.

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Akhapkin, D. N. "Bistable Texts: On Cognitive Mechanisms of Maintaining of Unresolved Ambiguity." Critique and Semiotics 37, no. 2 (2019): 136–45. http://dx.doi.org/10.25205/2307-1737-2019-2-136-145.

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The article introduces the concept of bistable texts in literature, that reflects a notion of bistable images in cognitive psychology. Bistable texts are the texts that can be read in two different and not intersected semantic plans. They are characterized not by uncertainty but the certainty of two equally plausible interpretations, each one of which is independent and sovereign when it occupies the conscious stage. The main features of the bistable text are exclusivity, inevitability and randomness. As an example of bistable text one of the poems written by Russian poet Vladimir Strochkov is analyzed.

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Wang, Guang-Qing, and Wei-Hsin Liao. "A bistable piezoelectric oscillator with an elastic magnifier for energy harvesting enhancement." Journal of Intelligent Material Systems and Structures 28, no. 3 (July 28, 2016): 392–407. http://dx.doi.org/10.1177/1045389x16657419.

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Bistable oscillator has been recognized as an effective means by which to improve the linear resonant energy harvesting performance for its unique double-well restoring force potential. As oscillating in a high-energy orbit, the oscillator should be located at a distance from one stable to the other with a much higher velocity or acceleration. However, the vibration level in environment would be too low to provide the oscillator with a larger velocity to overcome the potential well barrier. This article is focused on the enhancement of a bistable piezoelectric oscillator with an elastic magnifier for high-energy orbit harvesting. The elastic magnifier positioned between the bistable piezoelectric oscillator and the base is to amplify the base vibration level in order to provide the bistable piezoelectric harvester with large movement. A 2-degree-of-freedom nonlinear lumped-parameter model of the bistable piezoelectric harvester with an elastic magnifier (bistable piezoelectric harvester + elastic magnifier) is derived to exhibit the large-amplitude periodic oscillation behaviors. With the comparison of the electromechanical responses obtained from theory and experiment, the results show that the output displacement, tip velocity, and harvesting voltage under open-circuit condition of the bistable piezoelectric harvester + elastic magnifier configuration are 15 mm, 1500 mm s−1, and 13 V, respectively, while those of the only bistable piezoelectric harvester configuration are 1 mm, 120 mm s−1, and 2 V under the excitation level of 8.69 m s−2 and frequency of 16 Hz. It is verified that the bistable piezoelectric harvester with an elastic magnifier can generate larger output performance than that of the bistable piezoelectric harvester without elastic magnifier at several excitation frequencies and levels.

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Huang, Zi Qiang. "Bistable Technology in Flat Panel Display: Principle and Progress." Key Engineering Materials 428-429 (January 2010): 206–11. http://dx.doi.org/10.4028/www.scientific.net/kem.428-429.206.

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Active matrices often related with high grade display devices, due to application of the storage elements, typically thin film transistor (TFT). Because of the complex procedures in the manufacturing TFT, investment of the high value manufacturing equipments and clarification plants is necessary, hence increasing the manufacturing cost of the flat panel, and more importantly, causing the pollution of water and air. As the contribution of TFT array merely exists in supplying storage function for the pixels of the display panel, large efforts have been made to find suitable cells that have bistable effect, so as to substitute the effect of TFT. As the bistable cell is just the storage pixel, one could construct a bistable cell to skip the needs of TFT active matrices. The paper is to introduce currently available bistable display devices in the following field: liquid crystal bistable displays with cholesteric liquid crystals, which is an example to introduce the bistable technology; iMod display devices based on mechanic induced bistable and light interference, which shows the possibility to construct bistable display; and the display based on solid powder movement in air or in vacuum, so called liquid powder displays, which shows how to improve the existed display.

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Jensen, Brian D., and Larry L. Howell. "Bistable Configurations of Compliant Mechanisms Modeled Using Four Links and Translational Joints." Journal of Mechanical Design 126, no. 4 (July 1, 2004): 657–66. http://dx.doi.org/10.1115/1.1760776.

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Bistable mechanical devices remain stable in two distinct positions without power input. They find application in valves, switches, closures, and clasps. Mechanically bistable behavior results from the storage and release of energy, typically in springs, with stable positions occurring at local minima of stored energy. Compliant mechanisms offer an elegant way to achieve this behavior by incorporating both motion and energy storage into the same flexible element. Interest in compliant bistable mechanisms has also recently increased because of the advantages of bistable behavior in many micro-electro-mechanical systems (MEMS). Design of compliant or rigid-body bistable mechanisms typically requires simultaneous consideration of both energy storage and motion requirements. This paper simplifies this process by developing theory that provides prior knowledge of mechanism configurations that guarantee bistable behavior. Configurations which include one or more translational, or slider, joints are studied in this work. Several different mechanism types are analyzed to determine compliant segment placement that will ensure bistable mechanism operation. Examples demonstrate the power of the theory in design.

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Yan, Liangliang, Shuaishuai Lu, and Pengbo Liu. "Development of a Fully Compliant Bistable Mechanism Based on Circular Beams with Enhanced Pitch Stiffness." Applied Sciences 13, no. 3 (January 27, 2023): 1642. http://dx.doi.org/10.3390/app13031642.

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Compliant bistable mechanisms with planar configurations demonstrate two in-plane stable states through the nonlinear deformations of in-plane flexible segments, which are widely used in the field of shock sensors and threshold sensors. In these mechanisms, consistent dynamic and static bistable behaviors are difficult to maintain under the influence of an out-of-plane load. This is limited in some applications where precise displacement is required. To this end, we developed a bistable mechanism with circular beams instead of conventional straight beams, such that enhanced robustness against external loads in the out-of-plane region is obtained. An analytical kinetostatic model is established to predict the bistable behavior of the proposed mechanism, which is further verified using finite element simulations and experimental results. Compared with the prototype of the straight-beam-based bistable mechanism, the developed circular-beam bistable mechanism demonstrates improved pitch stiffness along the out-of-plane rotation and robustness against off-axis load conditions. The proposed bistable mechanism design can be extended to applications of sensors subjected to out-of-plane loads.

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Jensen, B. D., L. L. Howell, and L. G. Salmon. "Design of Two-Link, In-Plane, Bistable Compliant Micro-Mechanisms." Journal of Mechanical Design 121, no. 3 (September 1, 1999): 416–23. http://dx.doi.org/10.1115/1.2829477.

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A bistable mechanism has two stable states within its range of motion. Its advantages include the ability to stay in two positions without power input and despite small external disturbances. Therefore, bistable micro-mechanisms could allow the creation of MEMS with improved energy efficiency and positioning accuracy. This paper presents bistable micro-mechanisms which function within the plane of fabrication. These bistable mechanisms, called “Young” bistable mechanisms, obtain their energy storage characteristics from the deflection of two compliant members. They have two pin joints connected to the substrate, and can be constructed of two layers of polysilicon. The pseudo-rigid-body model is used to analyze and design these mechanisms. This approach allows greater freedom and flexibility in the design process. The mechanisms were fabricated and tested to demonstrate their bistable behavior and to determine the repeatability of their stable positions.

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Rombouts, Jan, and Lendert Gelens. "Dynamic bistable switches enhance robustness and accuracy of cell cycle transitions." PLOS Computational Biology 17, no. 1 (January 7, 2021): e1008231. http://dx.doi.org/10.1371/journal.pcbi.1008231.

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Bistability is a common mechanism to ensure robust and irreversible cell cycle transitions. Whenever biological parameters or external conditions change such that a threshold is crossed, the system abruptly switches between different cell cycle states. Experimental studies have uncovered mechanisms that can make the shape of the bistable response curve change dynamically in time. Here, we show how such a dynamically changing bistable switch can provide a cell with better control over the timing of cell cycle transitions. Moreover, cell cycle oscillations built on bistable switches are more robust when the bistability is modulated in time. Our results are not specific to cell cycle models and may apply to other bistable systems in which the bistable response curve is time-dependent.

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Dong, Ting, Xinhua Chen, and Jun Zhang. "Study on Dynamic Snap-Through and Nonlinear Vibrations of an Energy Harvester Based on an Asymmetric Bistable Composite Laminated Shell." Symmetry 13, no. 12 (December 13, 2021): 2405. http://dx.doi.org/10.3390/sym13122405.

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Bistable energy harvesters have been extensively studied. However, theoretical research on the dynamics of bistable energy harvesters based on asymmetric bistable composite laminated plate and shell structures has not been conducted. In this paper, a theoretical model on the dynamics of an energy harvester based on an asymmetric bistable composite laminated shell is established. The dynamic snap-through, the nonlinear vibrations and the voltage output with two potential wells of the bistable energy harvester are studied. The influence of the amplitude and the frequency for the base excitation on the bistable energy harvester is studied. When the frequency for the base excitation with a suitable amplitude in the frequency sweeping is located in a specific range or the amplitude for the base excitation with a suitable frequency in the amplitude sweeping is located in a specific range, the large-amplitude dynamic snap-through, nonlinear vibrations and voltage output with two potential wells can be found to occur. The amplitude and the frequency for the base excitation interact on each other for the specific amplitude or frequency range which migrates due to the softening nonlinearity. The vibration in the process of the dynamic snap-through behaves as the chaotic vibration. The nonlinear vibrations of the bistable system behave as the periodic vibration, the quasi-periodic vibration and the chaotic vibration. This study provides a theoretical reference for the design of energy harvesters based on asymmetric bistable composite laminated plate and shell structures.

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Zhang, Mei Li, and Min Lin. "The Control of Stochastic Resonance by Harmonic Signal." Applied Mechanics and Materials 50-51 (February 2011): 559–63. http://dx.doi.org/10.4028/www.scientific.net/amm.50-51.559.

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The symmetry in a double-well potential of bistable systems subject to the action of a harmonic signal is broken. By variation of the amplitude of a harmonic signal, the asymmetry of bistable systems can be effectively controlled, the transitions probability between the two potential wells is increased and has influence on the effect of stochastic resonance in bistable systems. Numerical simulations show that adjusting the amplitude of a harmonic signal can produce stochastic resonance or make stochastic resonance more intense in bistable systems. It is a new method for stochastic resonance control.

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Zhang, Zhongwen, Fenglan Shi, Chuang Yang, and Zhao-Dong Xu. "Quasi-zero stiffness isolator based on bistable structures with variable cross-section." Journal of Low Frequency Noise, Vibration and Active Control 41, no. 1 (September 27, 2021): 405–16. http://dx.doi.org/10.1177/14613484211038404.

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Simple and light-weighted quasi-zero stiffness (QZS) isolators can be designed based on nonlinear and negative stiffness generated by the snap-through effect of bistable structures. Traditionally, the snap-through force of the bistable structure is limited which makes the weight which can be isolated based on this mechanism very low. This paper investigates increasing loading capacity of this kind of isolator by using an optimized and varying sectional profile. Numerical models were derived for the bistable structures with variable sectional distributions. Optimized sections’ alignment of the bistable beam was derived based on the numerical model which was consequently validated by experimental results. Influences of the bistable beams with a variable section on nonlinear stiffness characteristics and performance of the isolator were at last investigated with the harmonic balance method.

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Zhao, Yan-Li, Ali Trabolsi, and J. Fraser Stoddart. "A bistable pretzelane." Chemical Communications, no. 32 (2009): 4844. http://dx.doi.org/10.1039/b910510g.

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Ma, Liping, Jie Liu, Seungmoon Pyo, Qianfei Xu, and Yang Yang. "Organic Bistable Devices." Molecular Crystals and Liquid Crystals 378, no. 1 (January 2002): 185–92. http://dx.doi.org/10.1080/713738589.

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VanHook, A. M. "Bistable Trypanosome Switch." Science Signaling 3, no. 127 (June 22, 2010): ec186-ec186. http://dx.doi.org/10.1126/scisignal.3127ec186.

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Gray, Gary D., Eric M. Prophet, Lingbo Zhu, and Paul A. Kohl. "Magnetically bistable actuator." Sensors and Actuators A: Physical 119, no. 2 (April 2005): 502–11. http://dx.doi.org/10.1016/j.sna.2004.10.025.

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Gray, Gary D., and Paul A. Kohl. "Magnetically bistable actuator." Sensors and Actuators A: Physical 119, no. 2 (April 2005): 489–501. http://dx.doi.org/10.1016/j.sna.2004.10.027.

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KAPLAN, A. E. "BISTABLE OPTICAL SOLITONS." Le Journal de Physique Colloques 49, no. C2 (June 1988): C2–69—C2–74. http://dx.doi.org/10.1051/jphyscol:1988215.

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Kevrekidis, P. G., I. G. Kevrekidis, B. A. Malomed, H. E. Nistazakis, and D. J. Frantzeskakis. "Dragging Bistable Fronts." Physica Scripta 69, no. 6 (January 1, 2004): 451–55. http://dx.doi.org/10.1238/physica.regular.069a00451.

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Ziegler, Kirk J., Daniel M. Lyons, Justin D. Holmes, Donats Erts, Boris Polyakov, Håkan Olin, Krister Svensson, and Eva Olsson. "Bistable nanoelectromechanical devices." Applied Physics Letters 84, no. 20 (May 17, 2004): 4074–76. http://dx.doi.org/10.1063/1.1751622.

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Pimienta, V., D. Lavabre, G. Levy, J. C. Micheau, and J. P. Laplante. "Bistable photochemical reactions." Journal of Molecular Liquids 63, no. 1-2 (January 1995): 121–73. http://dx.doi.org/10.1016/0167-7322(94)00787-w.

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Jeppesen, Jan O., Kent A. Nielsen, Julie Perkins, Scott A. Vignon, Alberto Di Fabio, Roberto Ballardini, M. Teresa Gandolfi, et al. "Amphiphilic Bistable Rotaxanes." Chemistry - A European Journal 9, no. 13 (July 7, 2003): 2982–3007. http://dx.doi.org/10.1002/chem.200204589.

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KAWAGUCHI, H. "POLARIZATION BISTABLE LASER DIODES." Journal of Nonlinear Optical Physics & Materials 02, no. 03 (July 1993): 367–89. http://dx.doi.org/10.1142/s021819919300022x.

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Static and dynamic characteristics of a pitchfork bifurcation polarization bistability in a laser diode are analyzed using rate-equations taking account of nonlinear gain. It is shown that the bistable laser diode has the advantage of high-speed switching when trigger optical pulses are coupled coherently to the bistable laser output. Experimental results on this new polarization bistability in a laser diode with a two-armed polarization-selective external cavity are also described with a brief review of recent progress in research on polarization bistable laser diodes.

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Lee, R. H., and C. J. Heckman. "Influence of voltage-sensitive dendritic conductances on bistable firing and effective synaptic current in cat spinal motoneurons in vivo." Journal of Neurophysiology 76, no. 3 (September 1, 1996): 2107–10. http://dx.doi.org/10.1152/jn.1996.76.3.2107.

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1. After application of the noradrenergic alpha 1 agonist methoxamine, muscle spindle Ia input evoked bistable firing patterns (i.e., persistent discharges after Ia input ceased) in adult spinal motoneurons in the decerebrate cat preparation. These bistable discharge patterns were compared with the Ia currents generated in voltage-clamp conditions. 2. During voltage clamp at depolarized holding potentials, the Ia effective synaptic current underwent strong amplification. In those cells with strong bistable firing, a prolonged tail current followed the Ia input. Because the voltage clamp held the behavior of somatic conductances constant, these data indicate that voltage-sensitive conductances in the motoneuron dendrites made an important contribution to bistable firing.

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Li, Zhou. "The Spontaneous Radiation of Verticalcavity Semiconductor Optical Amplifiers in Bistable Effect." Advanced Materials Research 712-715 (June 2013): 1807–10. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1807.

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A bistable model is established including the effect of spontaneous emission in a vertical cavity semiconductor optical amplifier (VCSOA). The sensitivities to the amplified spontaneous emission (ASE) of the bistable characteristics in a VCSOA and a traditional edge emitting SOA are compared by numerical analysis. The control of the bistable characteristics and the degeneration of the bistability hysteresis are also analyzed by utilizing the modified model.

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36

Zeng, Quan, Michael D. Laiosa, Douglas A. Steeber, Eulandria M. Biddle, Quan Peng, and Ching-Hong Yang. "Cell Individuality: The Bistable Gene Expression of the Type III Secretion System in Dickeya dadantii 3937." Molecular Plant-Microbe Interactions® 25, no. 1 (January 2012): 37–47. http://dx.doi.org/10.1094/mpmi-05-11-0105.

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Dickeya dadantii 3937 is a gram-negative phytopathogenic bacterium that expresses genes encoding a type III secretion system (T3SS) in a bistable pattern when cultured in a homogeneous minimal media. In this work, we further characterized the bistable gene expression of T3SS at the single-cell level. We demonstrated that bistable expression of the HrpL-regulon genes, such as hrpA and hrpN, is controlled by the same regulatory mechanism. We also showed that the expression level of the T3SS master regulatory gene hrpL plays an important role in the development of the bistable expression of hrpA. A high expression level of hrpL is required but unable to guarantee the high-state expression of hrpA in a cell. In addition, bistable expression patterns of T3SS genes in other gram-negative pathogens of the Enterobacteriaceae and Pseudomonadaceae families were also described in this study. This suggests that the T3SS bistability might be a conserved population behavior in several gram-negative bacterial pathogens.

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Frank, Till D. "Unstable Modes and Order Parameters of Bistable Signaling Pathways at Saddle-Node Bifurcations: A Theoretical Study Based on Synergetics." Advances in Mathematical Physics 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8938970.

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Mathematical modeling has become an indispensable part of systems biology which is a discipline that has become increasingly popular in recent years. In this context, our understanding of bistable signaling pathways in terms of mathematical modeling is of particular importance because such bistable components perform crucial functions in living cells. Bistable signaling pathways can act as switches or memory functions and can determine cell fate. In the present study, properties of mathematical models of bistable signaling pathways are examined from the perspective of synergetics, a theory of self-organization and pattern formation founded by Hermann Haken. At the heart of synergetics is the concept of so-called unstable modes or order parameters that determine the behavior of systems as a whole close to bifurcation points. How to determine these order parameters for bistable signaling pathways at saddle-node bifurcation points is shown. The procedure is outlined in general and an explicit example is worked out in detail.

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Wu, Qiong, Hairui Zhang, Jie Lian, Wei Zhao, Shijie Zhou, and Xilu Zhao. "Experiment Investigation of Bistable Vibration Energy Harvesting with Random Wave Environment." Applied Sciences 11, no. 9 (April 25, 2021): 3868. http://dx.doi.org/10.3390/app11093868.

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The energy harvested from the renewable energy has been attracting a great potential as a source of electricity for many years; however, several challenges still exist limiting output performance, such as the package and low frequency of the wave. Here, this paper proposed a bistable vibration system for harvesting low-frequency renewable energy, the bistable vibration model consisting of an inverted cantilever beam with a mass block at the tip in a random wave environment and also develop a vibration energy harvesting system with a piezoelectric element attached to the surface of a cantilever beam. The experiment was carried out by simulating the random wave environment using the experimental equipment. The experiment result showed a mass block’s response vibration was indeed changed from a single stable vibration to a bistable oscillation when a random wave signal and a periodic signal were co-excited. It was shown that stochastic resonance phenomena can be activated reliably using the proposed bistable motion system, and, correspondingly, large-scale bistable responses can be generated to realize effective amplitude enlargement after input signals are received. Furthermore, as an important design factor, the influence of periodic excitation signals on the large-scale bistable motion activity was carefully discussed, and a solid foundation was laid for further practical energy harvesting applications.

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Vazquez, Elena, and Jose P. Duarte. "Bistable kinetic shades actuated with shape memory alloys: prototype development and daylight performance evaluation." Smart Materials and Structures 31, no. 3 (February 15, 2022): 034001. http://dx.doi.org/10.1088/1361-665x/ac5014.

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Abstract Kinetic façade systems can adjust to different environmental conditions, thereby improving daylight performance in buildings. Bistable laminates present large deflections and can maintain their state without continuous energy supply, appealing features for kinetic applications. Nevertheless, these engineered materials have yet to be studied for their potential for improving daylight performance in buildings. This study sought to test the daylight performance of a kinetic bistable screen using a case study approach that combines experimental testing and building performance simulation. This paper details research to design and fabricate the shading screen and the experimental testing of the screens’ daylight performance. First, we focus on the design of a holder mechanism, which relies on a string system and shape memory alloys that actuate bistable flaps. Second, we experimentally collect data on daylight performance and compare it to simulation data to validate a daylight model. Results show that the designed bistable screen can increase the hours of adequate daylight throughout the year versus baseline cases, particularly when oriented south and east. The study suggests that bistable kinetic screens can help improve daylight performance in buildings.

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Xu, Ning, Xue Lei, Ping Ao, and Jun Zhang. "Bifurcation Analysis for Phage Lambda with Binding Energy Uncertainty." Computational Biology Journal 2014 (February 3, 2014): 1–11. http://dx.doi.org/10.1155/2014/465216.

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In a phage λ genetic switch model, bistable dynamical behavior can be destroyed due to the bifurcation caused by inappropriately chosen model parameters. Since the values of many parameters with biological significance often cannot be accurately acquired, it is thus of fundamental importance to analyze how and to which extent the system dynamics is influenced by model parameters, especially those parameters pertaining to binding energies. In this paper, we apply a Jacobian method to investigate the relation between bifurcation and parameter uncertainties on a phage λ OR model. By introducing bistable range as a measure of system robustness, we find that RNA polymerase binding energies have the minimum bistable ranges among all the binding energies, which implies that the uncertainties on these parameters tend to demolish the bistability more easily. Moreover, parameters describing mutual prohibition between proteins Cro and CI have finite bistable ranges, whereas those describing self-prohibition have infinity bistable ranges. Hence, the former are more sensitive to parameter uncertainties than the latter. These results help to understand the influence of parameter uncertainties on the bifurcation and thus bistability.

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Arnouts, Liesbeth I. W., Thierry J. Massart, Niels De Temmerman, and Péter Z. Berke. "Coupled Sizing, Shape and Topology Optimisation of Bistable Deployable Structures." Journal of the International Association for Shell and Spatial Structures 61, no. 4 (December 1, 2020): 264–74. http://dx.doi.org/10.20898/j.iass.2020.009.

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Bistable scissor structures, consisting of beams connected by hinges, are transportable and can be transformed from a compact to a deployed configuration. Geometric incompatibilities can be introduced during transformation to obtain a bistable structural response which enforces some instantaneous structural stability in the deployed state. The design of bistable scissor structures requires assessing both the non-linear transformation behaviour, as well as the service state, since a proper structural design has to provide stiffness in the deployed state as well as flexibility during transformation. These contradicting requirements were formulated previously in Arnouts et al. [1] as a multi-objective shape and sizing optimisation (SSO). The originality of this contribution is the elaboration of a design methodology coupling a novel topology optimisation (TO) to SSO and demonstrating its performance for the design of a bistable deployable wall. In this novel step, the number of bistable deployable modules (BDM) of the structure is optimised at low computational cost by finding the location of BDM, yielding mixed structures composed of BDM and non-bistable modules (NBDM) of lower weight and complexity than structures entirely built from BDM. TO is incorporated and assessed in the design methodology prior or subsequent to the SSO step. It is shown that the mixed structures combining BDM and NBDM resulting from the new coupled TO-SSO approach outperform pure BDM based structures.

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Zareei, Ahmad, Bolei Deng, and Katia Bertoldi. "Harnessing transition waves to realize deployable structures." Proceedings of the National Academy of Sciences 117, no. 8 (February 10, 2020): 4015–20. http://dx.doi.org/10.1073/pnas.1917887117.

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Transition waves that sequentially switch bistable elements from one stable configuration to another have received significant interest in recent years not only because of their rich physics but also, for their potential applications, including unidirectional propagation, energy harvesting, and mechanical computation. Here, we exploit the propagation of transition waves in a bistable one-dimensional (1D) linkage as a robust mechanism to realize structures that can be quickly deployed. We first use a combination of experiments and analyses to show that, if the bistable joints are properly designed, transition waves can propagate throughout the entire structure and transform the initial straight configuration into a curved one. We then demonstrate that such bistable linkages can be used as building blocks to realize deployable three-dimensional (3D) structures of arbitrary shape.

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LI, CHUN, LUCHUN DU, and DONGCHENG MEI. "SIMULATION STUDY OF NOISE-ENHANCED STABILITY AND RESONANT ACTIVATION IN A BISTABLE SYSTEM INDUCED BY TIME DELAY." Modern Physics Letters B 25, no. 02 (January 20, 2011): 141–49. http://dx.doi.org/10.1142/s0217984911025559.

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The thermal activation problem of a bistable system driven by correlated noises with time delay is investigated by means of numerical simulations. The simulation results indicate: (1) For the case of the bistable system with linear delay, the phenomenon of noise enhanced stability (NES) is enforced by increasing delay time τ as the multiplicative noise intensity D is smaller, but is weakened as D is larger. (2) For the case of the bistable system with cubic delay, the NES becomes faintness as τ increases. (3) For the case of the bistable system with global delay, the NES is still restrained by increasing τ with smaller D, and in some circumstances, the activation rate as a function of τ exists a peak structure, which demonstrating the emergence of resonant activation.

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44

Zhou, Li. "Effect of Spontaneous Radiation of Vertical-Cavity Semiconductor Optical Amplifier Bistability." Advanced Materials Research 945-949 (June 2014): 2209–12. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2209.

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Includes the establishment of the spontaneous radiation of vertical cavity semiconductor optical amplifier (VCSOA) bistable model, numerical analysis and comparison of VCSOA and traditional SOA bistable characteristics of amplified spontaneous emission (ASE) sensitivity.

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45

Pan, Shuxia, and Ping-An Zhang. "Bistable Wave Fronts in Integrodifference Equations." Abstract and Applied Analysis 2011 (2011): 1–21. http://dx.doi.org/10.1155/2011/230851.

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This paper is concerned with the bistable wave fronts of integrodifference equations. The existence, uniqueness, and asymptotic stability of bistable wave fronts for such an equation are proved by the squeezing technique based on comparison principle.

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Cherkaev, Andrej, and Seubpong Leelavanichkul. "An Impact Protective Structure with Bistable Links." International Journal of Damage Mechanics 21, no. 5 (September 12, 2011): 697–711. http://dx.doi.org/10.1177/1056789511410458.

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This article discusses a protective structure of a special morphology with an advanced impact resistance. We use a ‘bistable’ structure that is designed to have a non-unique stress–strain relation. When the strain reaches a threshold, some parts (sacrificial elements) yield and subsequently fail and the remaining parts (waiting elements) become active; the waiting elements carry the load and preserve structural integrity. Damage in bistable structures is more stable; the cracks do not develop due to yielding of structural elements and damage delocalization. The damage spreads in a larger region than in a conventional structure, and the load is redistributed. As a result of these effects, more impact energy is absorbed. We describe the response of bistable structures in macro- and microscales, numerically investigate a problem of projectile impacting a protective net, and introduce a mesoscale damage tensor that measures the degree of damage in a small region. We compare the structural responses of the bistable and conventional structure depending on mass and speed of the projectile. Typically, the bistable structure dissipates more energy by creating a partial damage in a large area.

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Lu, Ze-Qi, Dong Shao, Zhi-Wei Fang, Hu Ding, and Li-Qun Chen. "Integrated vibration isolation and energy harvesting via a bistable piezo-composite plate." Journal of Vibration and Control 26, no. 9-10 (December 21, 2019): 779–89. http://dx.doi.org/10.1177/1077546319889815.

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In passive vibration isolation, a bistable composite plate can be used to generate high-static low-dynamic stiffness, and in vibratory energy harvesting, when used with piezoelectric film flexing, the bistable composite plate can enhance the performance via snap-through motion. In the present work, we designed a bistable piezo-composite plate for both vibration isolation and energy harvesting. The analytical model for performance prediction is derived from the virtual work principle and the composite elasticity. Displacement transmissibility and output voltage generation were analytically determined for different mechanical and electrical parameters. The results illustrate that the bistable piezo-composite plate improves the feasibility and effectiveness of the integration design. Hardening and softening nonlinear phenomena coexist in both the displacement transmissibility and the output voltage plot. Approximate analytical solutions and numerical simulations are in good agreement. Both analytical and numerical results demonstrate that, at a certain frequency bands, enhanced energy harvesting is accompanied by a vibration transmissibility reduction. Compared with a linear system with the bistable piezo-composite plate removed, it achieved a reduction in the displacement transmissibility of about 13 dB at 100 Hz, simultaneously, and produced a considerable output voltage of about 0.05 V.

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Maltisovs, M., K. Krumins, A. Ozols, and D. Pikulins. "Study of the Operational Properties of Bistable Smectic-A Liquid Crystal Displays." Latvian Journal of Physics and Technical Sciences 55, no. 3 (June 1, 2018): 54–62. http://dx.doi.org/10.2478/lpts-2018-0021.

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Abstract Nowadays liquid crystal display (LCD) is an integral part of humans’ everyday life. High demand for new and innovative LCD products force LCD industry to develop and implement new types of LCDs. Bistable smectic-A (SmA) LCD is one of the most promising devices for smart glass applications due to long-term bistability, low haze at clear state, low transmittance at scatter state and low power consumption. The study describes the most relevant conclusions obtained from frequency response testing and electric current measurements of bistable SmA LCD samples. Bistable LCDs have two states: opaque (light scattering state) and focal conic (transparent state). Switching between clear and scatter states and vice versa is a frequency dependant process. The conducted research on bistable SmA LC frequency response provides important knowledge about operation principles of the smart glass devices.

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Zhang, Xinming, Jianfeng Yan, and Fabing Duan. "Comparison of Bistable Systems and Matched Filters in Non-Gaussian Noise." Fluctuation and Noise Letters 15, no. 01 (March 2016): 1650003. http://dx.doi.org/10.1142/s0219477516500036.

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In this paper, we report that for a weak signal buried in the heavy-tailed noise, the bistable system can outperform the matched filter, yielding a higher output signal-to-noise ratio (SNR) or a lower probability of error. Moreover, by adding mutually independent internal noise components to an array of bistable systems, the output SNR or the probability of error can be further improved via the mechanism of stochastic resonance (SR). These comparison results demonstrate the potential capability of bistable systems for detecting weak signals in non-Gaussian noise environments.

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Li, Wei, Hanzhi Lu, and Yanyan Zuo. "Parallel Array Bistable Stochastic Resonance System with Independent Input and Its Signal-to-Noise Ratio Improvement." Mathematical Problems in Engineering 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/437843.

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We study the design enhancement of the bistable stochastic resonance (SR) performance on sinusoidal signal and Gaussian white noise. The bistable system is known to show an SR property; however the performance improvement is limited. Our work presents two main contributions: first, we proposed a parallel array bistable system with independent components and averaged output; second, we give a deduction of the output signal-to-noise ratio (SNR) for this system to show the performance. Our examples show the enhancement of the system and how different parameters influence the performance of the proposed parallel array.

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Journal articles on the topic 'Bistable'

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