查询词典 stimulus threshold

A comprehensive research has made in designing technologies of bilinear mapping based threshold group signature scheme. A bilinear mapping based chamellon threshold group signature and a forward security threshold group signature were analyzed, the mistakes and flaws in these schemes were pointed out.

对基于双线性映射的门限群签名方案设计技术进行了深入的研究，分析了一个基于双线性映射的卡梅隆门限群签名和一个基于双线性映射的前向安全的门限群签名，指出了这些方案设计中存在的一些设计错误和缺陷。

Consider the dependencies between the coefficients and their parents, a non-Gaussian bivariate distribution is given, and corresponding nonlinear threshold function is derived from the model using Bayesian estimation theory. According to non-subsampled Contourlet transform and bivariate threshold function, a novel Non-Subsampled Contourlet Transform based on Bivariate threshold function for image denoising is proposed. This scheme achieves enhanced estimation results for images that are corrupted with additive Gaussian noise over a wide range of noise variance.

该文依据非下采样Contourlet分解系数与其父系数之间的相关性，给出非高斯双变量分布，对该模型应用Bayes估值理论推导得到相应的非线性双变量阈值函数，综合非下采样Contourlet分解和双变量阈值函数，提出一种基于双变量阈值的非下采样Contourlet变换图像去噪方法。

A detection method of double-threshold constant false alarm movement object on double-base synthetic aperture radar includes finalizing distance compression of various pulse-sampling, dividing orientation time to be multiple CPI, carrying out FFT in each CPI to enter orientation frequency domain, comparing data amplitude of frequency channel at external of clutter region with the first threshold and outputting point trace, making coagulation on point trace, making Hough transform in point trace domain and making decision of the second threshold.

本发明涉及一种用于双基地合成孔径雷达的双门限恒虚警运动目标检测方法，其特征在于：1对每个脉冲采样完成距离压缩；2把方位时间分割成多个相干处理间隔；3在每个CPI内做快速傅立叶变换进入方位频域；4把杂波区外的频率通道的数据幅度和第一门限比较做判决并输出点迹；5点迹凝聚；6在点迹域做Hough变换并做第二门限判决。

The main contents in this thesis include the following three aspects: the study of reference circuit model based on sub-threshold MOSFETs, the design of reference circuit based on MOSFETs operating in sub-threshold region and the correction of process divagation for reference circuit based on sub-threshold MOSFETs, respectively.

本论文的研究工作主要是包括三个方面的内容，即亚阈值MOSFET基准电路模型的研究、亚阈值MOSFET基准电路的设计和亚阈值MOSFET基准电路的误差修正。

This paper presents the speckle suppression technology which includes the soft threshold, the hard threshold and the Garrote function threshold method. It gives the contrast result of the three method. Analyzed the embedded zero-trees wavelet coding method, it presents a SAR image coding technology with the speckle suppression. Finally, it presents a compressed SAR image with the speckle suppression.

摘要该文讨论了相干斑抑制技术中软阈值、硬阈值和Garrote函数去噪的方法，并对这些方法进行了比较；文中在讨论了嵌入式零树编码技术的基础上，提出了采用基于相干斑抑制技术的图像编码方法，利用该方法实现了对SAR图像数据的编码处理，给出了相应的处理结果。

M. Johnstone, a method integrated with an algorithm of the adaptive threshold selection, is used to overcome the shortcoming of discontinuity of Hard-threshold method and dispersion of the Soft-threshold method.

在多分辨分析小波阈值去噪方法的基础上，用一种改进的阈值函数和自适应阈值选取算法相结合的方法，克服了硬阈值法不连续性和软阈值法有偏差的缺点。

M. Johnstone, a method integrated with an improved threshold function and 2-D wavelet transform, is used to overcome the shortcoming of discontinuity of hard-threshold method and dispersion of the soft-threshold method.

M。 Johnstone提出的多分辨分析小波阈值去噪方法的基础上，用一种改进的闺值函数和二维小波变换相结合的方法，克服了硬阈值法不连续性和软阈值法有偏差的缺点。

Firstly, based on the force acting on a single-particle, establish a discriminant formula of the sand threshold, and prove that the sand threshold belongs to the cusp catastrophe. Then establish the basic equation of the cusp catastrophe using coordinate transformation and catastrophe theory. Finally, while particle Reynold number and equivalend diameter are the state variables and Shields parameter is the control variables, we can obtain the model of cusp catastrophe of sand threshold, putting those variables into the basic equations of the cusp catastrophe. The model is derived from the mathematics, which has a certain mathematical theory foundation.

首先从单颗沙粒受力分析出发，建立沙床沙粒起动条件判别公式，进而证明了风沙起动属于尖点型突变；然后通过坐标变换和突变理论建立了尖点突变的基本方程；最后本文选择颗粒雷诺数和等效粒径作为控制变量，希尔兹参数作为状态变量，并把它们代入尖点突变的基本方程，经过拓扑变换得到风沙起动的尖点突变模型，并与前人的公式及实验数据进行比较。

After hot carrier stress, devices were evaluated by using positive bias temperature instability test. With different trends in the time evolution of threshold voltage shift and sub-threshold swing degradation, it is found that electron trapping in the HfO2 is the major reason for the threshold voltage variation. Compared to control devices, devices with fluorine and nitrogen exhibit good passivation at the interface. Devices were measured at an elevated temperature.

在热载子效应后，接著进行正偏压温度不稳定的量测方法，从随时间变动的临界电压以及次临界摆幅，发现临界电压的变动趋势与临界摆幅变动趋势不符合，表示二氧化铪的原生缺陷补捉是造成临界电压变动的主因，而临界摆幅的变动也可得知有氟，氮处理元件具有比较好的介面可靠度。

And a new method determining threshold velocity is proposed. The threshold velocity determining by this method agrees with that by empirical results. Also the relation of the threshold velocity and frequency of explosion is analyzed.

在此基础上提出了一种确定安全速度阈值的方法，并确定了爆破荷载作用下黄麦岭磷矿采场岩质边坡的安全速度阈值，分析了安全速度阈值同爆破荷载频率之间的关系。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

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