噪声控制

First, corresponding to the unknown virtual control coefficients and unknown noise covariances, some parameters to be estimated are properly chosen.

摘要研究了一类具有未知虚拟控制系数和未知噪声协方差的随机非线性时滞大系统的适应镇定问题。

Based on the thorough analyzing function and practical value which amplifying call and telephone talk system should have, this thesis proposed the hardware and software scheme, which PC with software program controls system to work hormonally, and presented the introduction of hardware-circuit and software-realizati- on processes in detail.

本扩音对讲电话系统广泛应用于石油、化工、冶金、医药、煤炭等行业的生产场所，满足在此类易燃、易爆、强噪声的特定场合下对通信系统的要求。本论文通过对扩音对讲电话系统所应具有的功能、以及其实用价值进行深入分析的基础上，提出了单片机结合软件程序控制系统协调工作的软/硬件方案，并且给出了详细的硬件电路介绍以及软件实现机理。

The BCH coded authentication data is modulated by chaotic sequence and then embedded into the DCT domain of the image by using the owner's private key.The embedding process is controlled by Just Noticeable Difference of the DCT block.Users can extract the authentication data with the public key,while they can't get the private key to destroy or delete the watermark through the public key.

提出一种基于非对称水印的图像认证改进算法，算法中将经过BCH编码和混沌序列调制的认证信息作为水印，利用所有者私钥嵌入图像DCT域，嵌入过程根据DCT块的可视噪声阈值控制，用户可以利用公钥从水印图像中提取认证信息，但无法从公钥中获取任何私钥信息，从而无法破坏或删除水印。

The study on the transmission mechanism of power flow in complex coupling system, which aims at the optimum contr...

基于传递功率流控制原理研究复杂系统的动态特性与最优设计，是目前振动噪声领域的前沿课题和发展方向。

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。