噪声控制

For the multisensor linear discrete time-varying stochastic control systems with the different local dynamic models, using the Kalman filtering method, under the optimal fusion criterion weighted by scalars, the unified and universal optimal information fusion white noise deconvolution estimators are presenced, and for the corresponding time-invariant systems, the steady-state optimal information fusion white noise deconvolution estimators are also presented.

对于带不同局部动态模型的多传感器线性离散时变随机控制系统，应用Kalman滤波方法，在按标量加权最优融合准则下，提出了统一和通用的最优信息融合白噪声反卷积估值器，并对定常系统提出了稳态最优信息融合白噪声反卷积估值器。

For the multisensor linear discrete time-varying stochastic control systems with the different local dynamic models, using the Kalman filtering method, under the optimal fusion criterion weighted by scalars, the unified and universal optimal information fusion white noise deconvolution estimators are presenced, and for the corresponding time-invariant systems, the steady-state optimal information fusion white noise deconvolution estimators are also presented.

黑龙江大学自动化系，哈尔滨150080中文摘要：对于带不同局部动态模型的多传感器线性离散时变随机控制系统，应用Kalman滤波方法，在按标量加权最优融合准则下，提出了统一和通用的最优信息融合白噪声反卷积估值器，并对定常系统提出了稳态最优信息融合白噪声反卷积估值器。

Aiming at these characters of original data, this paper upbuilds a kind of noise departure model via wavelet packet and soft threshold syncretizing, meanwhile, the relevant scaled functions are controlled by the required accuracy value so that we can obtain the needed accuracy and noise.

文中针对原始数据的特征，建立对其小波包分解后的各高频门限权值融合，并利用要求的数据精度值控制权函数的噪声分离模型，得到σ控制的数据和各种噪声的分离。

In the basis of importing, studying and taking advantages of home and abroad advanced technology, our company invested and made great efforts to develop the new blower — low-noise cabinet centrifugal fire blower with precise techniques and strict quality control. The blower is efficient, low-noise, powerful, heat resistance, and easy to install, operate, maintain, and with fine outline design.

低噪声柜式离心消防风机是我公司在引进、消化和吸收国内外先进技术的基础上，反复推敲，精心设计，以精湛的加工工艺和严格的质量控制生产出来的新型风机，该风机具有效率高、噪声低、风量足、耐高温、安装简捷、使用维护方便和外形美观等特点。

It is a challenge to develop the internal docoration of military turboprop aircraft.

叙述了涡轮螺旋桨飞机的噪声来源及主要传播途径，阐述了舱内噪声的控制与降噪设计原理，并进行了降噪试验研

The finite element models of an engine block, oil pan, valve cover and gear cover were established by using the ANSYS software, and the calculation results were validated by the test results.

无论采用何种燃油供给系统和燃烧方式，都有必要对柴油机表面的振动特性和声学特性规律进行研究，在噪声向外传递的途径上最大限度地控制噪声水平。

Sting Ray represents the first generation of programmable torpedoes and attention has been turned to the problems of how to harness the vast computer powers now available with their associated software programs, how to package the maximum computer power in the smallest possible space, and how to improve still further the processing and filtering techniques so vital to exclude extraneous noise and vibration.

分析：并列分句attention has been turned to the problems…里的the problems后的介词of 接有三个由疑问词how +动词不定式短语构成的并列成分。filtering techniques：滤波技术，鱼雷利用该技术可以滤掉海洋里产生的干扰声源和鱼雷在水里运动时产生的振动和噪声，所有这些干扰都会对装在鱼雷上的声纳产生干扰，从而影响其探测功能。译文：&鳐鱼&代表着第一代程序控制鱼雷。人们已经将注意力转到如何利用现有的巨大计算机能力及其相关软件程序，如何在尽可能小的空间内容纳最大的计算机能力，以及如何更进一步改进对于排除外来噪声和震动来说至关重要的处理与滤波技术等问题上。

Sound source to reduce the noise radiation is the fundamental way to control noise.

降低声源的噪声辐射是控制噪声的根本途径。

One of the most fundamental and effective methods to reduce automobile noise is the control of radiated noise from engine surface.

控制发动机表面辐射噪声是降低汽车噪声最根本有效的方法之一。

This dissertation takes example for JL475Q engine and makes researches on analysis and control radiated noise from engine surface.

本文以JL475Q发动机为例，对其表面辐射噪声进行了深入研究，并提出了控制其表面辐射噪声的有效措施。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。