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S. Rajasekar Javier Used 《Communications in Nonlinear Science & Numerical Simulation》2012,17(8):3435-3445
We investigate vibrational resonance in two different nonlinear maps driven by a biharmonic force: the Bellows and the Rulkov map. These two maps possess dynamical features of particular interest for the study of these phenomena. In both maps, the resonance occurs at the low-frequency of the biharmonic signal as the amplitude of the high-frequency signal is varied. We also consider an array of unidirectionally coupled maps with the forcing signal applied to the first unit. In this case, a signal propagation with several interesting features above a critical value of the coupling strength is found, while the response amplitude of the ith unit is greater than the first one. This response evolves in a sigmoidal fashion with the system number i, meaning that at some point the amplitudes saturate. The unidirectional coupling acts as a low-pass filter for distant units. Moreover, the analysis of the mean residence time of the trajectory in a given region of the phase space unveils a multiresonance mechanism in the coupled map system. These results point at the relevance of the discrete-time models for the study of resonance phenomena, since analyses and simulations are much easier than for continuous-time models. 相似文献
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分析了环境对波纹管自调节式J-T制冷器维持流量的影响途径,并提出了三种优化途径,即通过优化波纹管有效面积与刚度比,或改变调节器工作点温度,或改变调节器充气种类来按需优化环境变化对波纹管自调节式J-T制冷器维持流量的影响。 相似文献
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电动控制阀由波纹管控制件、壳体件、活门杆件、弹簧、密封件线圈等零部件组成,因对控制阀的核心关键件波纹管组件研制生产的困难,目前国内还没有别的厂家自主研制成功.本公司根据多年的敏感元件生产经验,对控制阀进行了国产化研制.经过批产考验,其研制的产品性能满足要求,形成了自主设计的产品. 相似文献
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HU Gang 《核工业西南物理研究院年报(英文版)》2005,(1):92-94
In ITER facilities, there are some special expansion joints connected with the openings of cryostat. Expect for the assemblies connected with NB openings, others are rectangular section with big dimensions and severe working conditions and they are important for ITER safe runing. 相似文献
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