查询词典 acoustic

After studying the theory of combined signal processing with acoustic pressure and particle velocity, a method of direction estimation underwater, which is based on intensity measurement using an acoustic vector sensor, is presented. In the low frequency field with kinds of line-spectra, azimuth angle estimation is achieved based on the probability density statistics and bar graph approach. It can preferably resolve the problem of left/right bearing resolution and estimate the direction of space.

为了对水下目标进行定位，基于声压与振速联合信号处理的理论，研究了复声强法对水下目标信号的定向技术，并使用概率统计和直方图的理论对目标的方位角和俯仰角值进行了估计，在线谱分量存在的低频段对估计角度进行了概率统计，较好地解决了左右舷的分辨问题，实现目标的全空间无模糊定向。

In order to develop the passive acoustic intelligent mines for antihelicopter and anti-tank, this thesis systematically investigates the passive localization principle of acoustic array and some methods for tracking helicopters and tanks.

为反直升机、反坦克被动声探测智能地雷研制的需要，本文系统地探讨和分析了智能地雷被动声阵列定位原理，研究了智能地雷实现直升机、坦克目标定位的滤波、跟踪技术。

To increase average throughput and decrease end-to-end delay of underwater acoustic networks,the original MACAW protocol is improved according to the low quality and high delay characteristics of underwater acoustic channel.

为提高水声通信网络吞吐量并降低端对端时延，针对水声信道低质量和高延迟的特点，对MACAW协议作出了改进。

The TIB triphone model tying structure adaptation strategy uses the baseline acoustic model's triphone model tying result as the transcendental model clustering center, with the adaptation data alignment by the baseline acoustic model, re-estimate the TIB triphone model clustering center and model tying structure recursively under maximum likelihood principle.

以基本声学模型训练过程中的三音子模型聚类结果作为先验知识的聚类中心，依据基本声学模型对自适应语音库的分割，按照最大似然准则迭代地重估新的聚类中心和模型聚类结构。

Based on the ability of neural network in classification and recognization, a feed-forward multi-layer neural network is applied in the diagnosis of adhesive bond quality between metallic and nonmetallic components of a pressure vessel through acoustic feature extraction in the frequency domain, based upon the acoustic response on knocking the pressure vessel.

本文基于神经网络对目标的识别与分类能力，用简单的敲击法获取了某压力容器的声响应信号，通过对声信号的频域特征提取，应用前馈多层神经网络对压力容器的金属与非金属部件之间的粘接质量进行了诊断。

MIDI Controller This feature will turn your acoustic piano into a MIDI Controller. With this system you can use your acoustic piano's keyboard to record music to a computer, send keyboard and pedal data to a digital piano, external sound module, sequencer or other MIDI device.

MIDI控制器这一功能可把你的声学钢琴成为一个MIDI控制器，有了这种系统，你可以用你的原声钢琴的键盘记录音乐，以一台电脑，送键盘和踏板数据，以数码钢琴，外部音源，音序器或其它MIDI设备。

A speaker apparatus includes a speaker frame, an acoustic vibrating plate movably supported on the speaker frame, and a magnetic driver formed in the speaker frame for vibrating the acoustic vibrating plate.

一种扬声器装置，包括：扬声器架；声学振动板，可运动地支撑在扬声器架上；和磁驱动器，在扬声器架中形成，用于使声学振动板振动。

The first plurality of acoustic drivers and the second plurality of acoustic drivers may be ordered so that each pair of the first plurality is separated by one of the second plurality.

可以对所述多个第一声学驱动器和所述多个第二声学驱动器排序，使得所述多个第一声学驱动器的每一对被所述多个第二声学驱动器中的一个分开。

The natural vocalizations of non-passerine(Columbia livia domesticus, Chicken), sub-oscinepasserine(Melopsittacus undulates. Psittacula Agapornis), Oscine passenon and the vocalizations of sub-oscine passerine(Melopsittacus undulates, Psittacula Agapornis) after sectioning NXIIts were recorded by SHARP GF-6060 recorder. Cooledit2000, an acoustic analyzing software, was used to produce the original wave and it\'s expanded time windows, sonograms, spectrums and power static histograms. To distinguish the acoustic differences of their natural vocal and to find the changes of sub-oscine passerine\'s song after sectioning NXIIts, the above results is acoustically analyzed and compared, expecting to provide some advantage to further explaining the mechanism of vocal production.

本实验以非鸣禽，亚鸣禽以及鸣禽为实验材料，记录其正常叫声以及亚鸣禽断NXIIts后的叫声，用Cooledit2000声音处理软件制出原始信号及其展开图，声图，频率谱图以及能量统计分布图，并对所得结果进行声学比较分析，以期得到鸣禽、亚鸣禽及非鸣禽叫声在声学特性上的差异，以及亚鸣禽在断神经后叫声的声学变化，旨在为进一步解释其发声机制提供帮助。

Under the given loading method, the experimental results about new granite in Laxiwa show that the resilient deformation is found and acoustic emission counts rate is evidently enhanced when the minor principal stress is unloaded. The enhancing extent of acoustic emission counts rate increases with the intermediate principal stress.

在设定的加载方式下，针对拉西瓦新鲜花岗岩的试验结果表明：当卸载最小主应力时，岩石发生回弹变形，声发射计数率比卸载前显著增加，增加的幅度随中间主应力的增加而逐渐提高。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。