噪声控制

By using the colligation dispose technique, the noise can be reduced more...

通过综合治理，可使机舱内噪声降低 40dB以上，甲板上噪声降低 2 6dB以上，取得了很好的控制效果

Damping technology is one of the most efficient methods to control them.

各种机械设备在运转及工作过程中，都会产生不同程度的振动和噪声，阻尼减振降噪技术是有效控制振动和噪声的方法之一。

The former put stress on the research of time optimal control method , fuzzy discursion and moving track, and the latter on the study of EKF recursion algorithms , noise model and noise characteristic identification.

前者的重点是最优时间控制方法、模糊控制器的推理以及运动相轨迹分析；后者侧重于EKF的状态估计方法、噪声模型对滤波估计性能的影响以及噪声模型的辩识方法。

According to the analysis of noise characteristics produced in safety valve exhaust steam system in power house,this paper states that adopting muffle can control noise effectively.

通过对发电厂安全阀排汽系统产生的噪声特征进行分析，提出采用安装消音器的方式，对其噪声进行控制，具有明显的效果。

Analysis and Experimental Study on Acoustic Muffling Capability of Complex Shaped ...

噪声，是一种控制风机进，出口噪声，效果显著的消声设备。

It can measure peak particle, peak displacement, peak particle acceleration, frequency at the peak velocity and the resultant peak partide velocity, peak sound , and frequency at the peak sound in three dimensions.

NCSC 5300是便携式固化计算机控制的测震仪，可以调出测点的三维振动速度、振动加速度、质点振动位移、振动频率和噪声强度、噪声频率，打印出测试结果及振动频率与三维振动速度的关系图、三维振动波形图，是理想的爆破测震仪器

ABSTRACT :Noise pollution from the sound source, the main route of transmission and the receiver three basic aspects of composition, therefore the control of noise pollution must be part of these three studies as a system.

摘 要：噪声污染由声源，传播途径和受主三个基本环节组成，因此噪声污染的控制必须把这三个环节作为一个系统进行研究。

The analysis results showed that the strapdown approach will be faced to more error sources with sensor noise and motion disturbance. The simulation results verified this and indicated that the performance of the strapdown approach would not be as efficient as that of the direct approach.3. Analyzing the principle and error model of MEMS QRS gyro for the purpose of practical applications, the paper presented an autoregressive model for the gyro signal by means of time series theory.

应用牛顿力学原理分析了光电稳定跟踪机构的惯量耦合关系和动力学模型，推导了平台单轴伺服回路的控制方程，比较了直接稳定和捷联稳定方案在测量噪声和外部扰动共同作用下的性能特点，仿真结果表明，在同等噪声和扰动条件下，捷联稳定面临更多的误差源，因而最终的稳定精度较难达到直接稳定系统的水平。3。

So, the study in this dissertation focuses on some key points in theuncertainty treatment of mobile robot localization as follows: Combined with the multiple proprioceptive and exteroceptive sensors ofmobile robot MORCS-1, aimed at the drift error of fiber optic gyro as theproprioceptive sensor, the neural network using genetic algorithm as optimaltool is proposed to accomplish the modeling and calibration for temperaturedrift of fiber optic gyro, which can reduce the drift error to the standard outputat constant temperature; and aimed at the noisy disturbance of ranging datafrom the exteroceptive sensor laser scanner, a dynamic adaptive filter isintroduced through the analysis of neighboring ranging data in time and spatialcorrelation to realize the real-time and dynamic filter, which can validly filter the noisy disturbance to meet the requirement of the accurately real-timeobstacle detection in mobile robot navigation.

总结全文，在移动机器人定位的不确定性处理研究中，提出了一些具有一定创新性的方法：结合自行研制的移动机器人MORCS-1系统的多种内外部定位传感器，针对内部本体感受传感器光纤陀螺仪的漂移误差，提出采用基于遗传算法优化的神经网络来对光纤陀螺仪的温漂建模及校准，能够将其温漂变化控制在恒温条件下标准测试输出附近；针对外部环境感知传感器激光雷达测距数据中包含的噪声干扰，考虑移动机器人导航中激光雷达测距数据的时空关联性，提出采用动态自适应滤波技术进行预处理，从而可以有效滤除噪声干扰满足导航中障碍实时精确检测的要求。

Congratulations on choosing the dbx 166XL Compressor / Gate. The 166XL provides two channels of noise gating, OverEasy? or classic hard knee compression and PeakStop? limiting to give complete control of signal dynamics to studios, sound reinforcement companies, musicians, or anyone who needs quality processing quickly and easily.

感谢你选购dbx 166XL 压限/噪声器。dbx 166XL 提供两个噪声门通道，OVEREASY或专业硬拐点压缩和峰值终止限制，限制性地完全控制信号提供给录音室，专业音响扩声公司，音乐人，或者任何需要高质量地快速且容易地处理信号的人。

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。