查询词典 noise

Use Wide Aperture to improve the signal-to-noise ratio and spatial resolution for better penetration in deeper structures.

使用宽孔径比，提高空间分辨率为更好地渗透在更深的结构噪声信号对。

Analysis for signal-to-noise ratio of large aperture static imaging spectroscopy［J］.

大孔径静态干涉成像光谱仪的信噪比分析［J］。

Robust aposteriori L〓 filtering to noise inputting matrix uncertainty system can be reduced to the solution of a linear matrix inequality too.

对噪声输入矩阵不确定性情况下的鲁棒L〓验后滤波，本文的解法也归结为一凸优化问题，可有效的求解。

In discrete-time linear system, apriori H〓 filtering, aposteriori H〓 filtering, L〓 apriori filtering with an H〓 error bound, L〓 aposteriori filtering with an H〓 error bound, robust H〓 apriori filtering, robust apriori L〓 filtering, and robust aposteriori L〓 filtering to noise inputting matrix uncertainty system are considered.

对离散线性系统，研究了确定性系统的H〓验前滤波和验后滤波、H〓约束下的L〓验前滤波及验后滤波、不确定性系统的H〓验前滤波、鲁棒L〓验前滤波及噪声输入矩阵不确定性情况下的鲁棒L〓验后滤波。

Point out the electromagnetism signal produced by human campaign not be noise completely, in which, part has formed useful signal. Analyse through error theory, have gotten the mathematics relation of phase error and apparent resistivity error.

引入CSAMT的理论，对MT勘探中电干扰和磁干扰进行了研究，从理论上证实了磁场的信噪比要优于电场的，指出人类活动所产生的电磁信号并不全部是干扰，其中一部分构成了有用信号。

As referred to the 8th, March Scene, sounds have the aesthetic joyfulness. Although what appear on the scene is still impromptu, it differs greatly to the noise which refuses aesthetics.

就3.8的现场说来，声音是存在审美的愉悦感的，虽然现场出现的还是属于即兴声音的范畴，但是它和拒绝审美的噪音还是存在很大差别。

Two new functions based on the property of bubble wavelet are proposed. An approximate 2nd derivative of an analytical signal can be obtained by applying n times of the wavelet transform to the signal, the signal-to-noise ratio can be enhanced greatly.

根据小波的定义和墨西哥帽小波的一些特点提出了两种简单的窗口函数，利用它们对模拟高斯信号求2n阶近似导数的同时滤除了噪声，同时还可分离重叠峰，并讨论了尺度因子对变换结果的影响。

Combining the definition of CWT and the derivative property of convolution, we constructed a general method to calculate the approximate derivative of signal through CWT by using the first and second derivative of Gaussian function, Haar, and the first derivative of three-order-Spline function as wavelets. As compared with the other approaches of calculating derivative, which include the numerical differentiation, polynomial filters, Fourier transform, and the recently proposed DWT method, fast calculation and simple mathematical operation were remarkable advantages of CWT method. For the signal corrupted by severe noise (Signal-toNoise Ratio=5), the satisfactory results could also obtained via CWT method through appropriately adiusting the dilations.

在此基础上，(1)结合连续小波变换的特点和卷积的微分性质，提出了使用Gaussian函数的一阶和二阶导数，Haar和三次样条函数的一阶导数作为小波函数的连续小波变换计算信号近似导数的一般性方法，与其他导数计算方法(包括数字微分法，多项式滤波法，Fourier变换法和离散小波变换法)相比，本法简单便捷，计算速度快，对于噪声含量较高的信号(S/N为5)，只要适当调节尺度即可获得比较满意的结果。

An approximate formula of the signal-to-noise ratio is obtained based on the expression of the average error power.

在给出误差平均功率表达式的基础上，推导出信噪比的近似计算公式。

Firstly, the phase noise of microwave frequency source is obtained by using linear approximation method.

第三章主要是对拉曼激光的相位噪声的来源进行分析，具体计算拉曼激光的噪声。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。