声纳

The cuvier's beaked whales dive deep into the ocean in search of food .

居维叶突吻鲸要潜到很深的海底进行捕食，当这些鲸鱼捕食的时候，它们发出的声纳信号遇到物体会反射给鲸鱼，这个过程称作声纳定位。

This present algorithm further distinguishes itself through sufficiently utilizes the advantage that the vector sensors provide from other beam space DOA algorithms in several regards: 1 beams are formed in the vector-field domain; 2 produce at moderate signal-to-noise ratio estimation performance comparable to the traditional scale array methods;3 these vector-field beams are formed blindly using no apriori source information and coarse estimates of the direction cosine are derived to start off MUSICs iterative search so it demand less computation; 4 deploy agilely , since the fact that the output channel is various .

本文提出了矢量传感器阵列的自适应综合校准补偿方法，还提出利用单矢量传感器速度协方差矩阵分解来求解目标源方位，使得我们不要求校准源是合作性的，也无需知道校准源的先验知识，这比起常规辅助源校准方法具备较大宽容性。随着高性能阵列处理技术及数字信号处理硬件的快速发展和矢量传感器制造工艺的不断成熟，矢量传感器将在新型水雷、低频远程智能鱼雷、声纳浮标、低频拖曳线列阵和新型舰壳声纳，灵巧传感终端，战场监视系统，反隐形雷达，通讯等军民用领域取得良好的发展应用前景。

The experimental results indicate that the LMBP neural network has higher classification rate, more rapidly converge velocity by comparing with other improved BP algorithm and the Radial Basis Function neural network. Through the experiments of recognizing the sonar image polluted with Gaussian noise, it is proved that the LMBP neural network has good stability and better anti-noise performance.

通过与标准BP算法和几种常用改进型BP神经网络以及径向基函数网络比较，验证了用LMBP神经网络作为声纳图像识别系统中的分类器，能够提高图像的识别率，加快网络的收敛速度，通过对受不同程度高斯白噪声污染的声纳图象的识别，验证了其性能稳定，具有较好的抗噪声性能。

The application of H〓 control theory in robust control of sonar array servo system is studied in the thesis. The solution of singular H〓 control problem is investigated deeply, and the problem of sonar array servo system's generalized system being singular is solved. Numerical simulation is carried through at last.

本文还对H〓控制理论在声纳基阵伺服系统鲁棒控制中的应用进行了理论研究，对奇异H〓控制问题的解法进行了较深入的研究，并解决了猎雷声纳基阵伺服系统增广系统为奇异控制对象的控制问题，最后进行了数字仿真。

All of the submarines had the MGK-400 Rubikon sonar system. In the early 1980s, the Rubikon sonar was replaced by the MGK-500 Skat system, which used a much more capable digital computer and advanced signal processing.

所有这些潜艇都有MGK-400 Rubikon声纳系统，在80年代早期，Rubikon声纳被具有更强数字计算机和先进信号处理能力的MGK-500 Skat系统取代。

A wavelet domain solution combined with spatial correlation and fuzzy logic method for reverberation suppression and contrast enhancement was proposed.

针对声纳图像在生成和采集过程中产生大量的混响，提出了一种改进的基于小波系数相关性与模糊理论的声纳图像混响抑制与增强算法。

According to the course of active sonobuoy searching submarine, the effects of submarine evasion on combat effectiveness of active sonobuoy is studied.

根据主动声纳浮标搜潜的工作过程，对潜艇规避对主动声纳浮标作战效能的影响进行了研究。

On the foundation of introducing respective application of dipping sonar and sonobuoy in answering the call to anti-submarine,a new searching tactic is advanced and proved in theory that the tactic has more advantages.

在介绍吊放声纳与声纳浮标各自在应召搜潜中的运用的基础上，针对两者在单独使用上的不足提出了一种新的搜潜策略，并从理论上说明了这种新的搜潜策略具有一定的优势。

The acoustics system is based on AQS901 sonar system, compatible with BARRA, SSQ-41 and SSQ-53, TANDEM, and Ultra active and passive sonobuoys.

声纳系统核心为AQS901声学系统，可兼容巴拉，SSQ-41，SSQ-53，坦登和奥察等主动和被动声纳浮标。

Firstly, this paper based upon coordinate transformation in vector space, the resolution principles of ship's swinging in three rotative axes of a hull – mounted array sonar are developed. The analytical results are used as the rules to control and stabilize the attitude of the array sonar so as to isolate the swinging of the ship.

本文首先根据矢量空间坐标变换的原理，分析了船舶摇摆运动在声纳基阵转动轴上的分解原理，得出了控制和稳定声纳基阵姿态不受船舶摇摆影响时所需的控制规律。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新