排序方式: 共有17条查询结果,搜索用时 15 毫秒
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The stochastic resonance in an over-damped bias linear system subject to multiplicative and additive dichotomous noise (DN) is investigated. By using the linear-response theory and the properties of the DN, the exact expressions are found for the signal-to-noise ratio (SNR). It is shown that the SNR is a non-monotonic function of the correlation time of the additive DN, and it varies non-monotonically with the bias of the external field, the intensity and asymmetry of the multiplicative DN, as well as the external field frequency. Moreover, the SNR depends on the bias of the system, as well as the strength and asymmetry of the additive DN. 相似文献
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Experiment and application of parameter-induced stochastic resonance in an over-damped random linear system 下载免费PDF全文
This paper investigates the parameter-induced stochastic resonance using experimental methods in an over-damped random linear system with asymmetric dichotomous noise.Non-monotonic dependence of signal-to-noise ratio on the system parameter is observed.Several potential applications of parameter-induced stochastic resonance are given in circuits. 相似文献
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Stochastic resonance in a bias linear system with multiplicative and additive noise 总被引:7,自引:0,他引:7 下载免费PDF全文
In this paper, the stochastic resonance in a bias linear system
subjected multiplicative
and additive dichotomous noise is investigated. Using the linear-response
theory and the properties of the dichotomous noise, this paper finds
the exact expressions
for the first two moments and the signal-to-noise ratio
(SNR). It is shown that the SNR is a non-monotonic function of the
correlation time of the multiplicative and additive noise, and it varies
non-monotonously with the intensity and asymmetry of the multiplicative
noise as well as the external field frequency. Moreover, the SNR depends on
the system bias, the intensity of the cross noise between the multiplicative
and additive noise, and the strength and asymmetry of the additive noise. 相似文献
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利用CCD图像的灰度梯度实现物体三维测量 总被引:15,自引:5,他引:10
提出了一种利用CCD单目图像的灰度梯度测量三维表面的方法——灰度梯度法。巧妙地运用中间变量,找到灰度梯度与聚焦像表面梯度之间的映射关系,将灰度约束方程转变为可求解的一元方程,从而解出聚焦像表面的深度信息。利用聚焦像表面与物体间的几何光学的约束以及它们之间的空间共轭对称关系,将该三维表面变换到实际三维尺寸,以达到三维测量的目的。最后对影响该测量系统的误差进行了分析。该方法克服了传统的光切法因过多冗余图像而使测量效率低的缺点,且该方法约束条件容易实现。对球体和柱面体的试验误差率分别为6.0%和4.85%,显示出该方法在一定范围内是有效的。 相似文献
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针对混合滤波器组ADC系统因其ADC模拟输入带宽低而不能对频率较高的射频模拟信号直接进行模/数转换的瓶颈,本文提出了一种基于Nyquist采样定理和带通采样定理的抽取器数学模型,对该数学模型进行时域、频域的分析证明后,设计了一种基于该数学模型的SHA抽取器,进而在混合滤波器组ADC系统的基础上,提出了高速混合波波器组ADC系统。它能将带宽为(2MHz—2000MHz)的射频模拟信号直接模/数转换,且分辨率达到12比特以上,完全可以满足软件无线电直接射频采样的要求。 相似文献