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61. In addition, it is certificated that the passive synthetic aperture sonar array can realize effectively long distant source localization by normal-mode filtering method.

62. Sound reflection sound shadow of high frequency imaging sonar detecting mine underwater was simulated with computer.

63. The propeller shaft frequency is one of the important target recognition features for passive sonar.

64. A new adaptive data reduction algorithm is presented to display large amounts of data on the computer screen of active sonar system.

65. A sonar array signal simulator generating signals received by hydrophones in a sonar array is useful in underwater acoustic engineering. It can simulate true detected targets as well as the ambience.

66. It's here today -- with night vision, sonar bumpers, video games.

67. The F is used for short range anti-submarine purpose around the carrier and depends on its own AQS-13F suspensory sonar to detect the submarine.

68. Describing the common display format of sonar display in detail that is all-scene, fan-scene, A-type and range-azimuth etc.

69. This paper analysised the possibility of using the adaptive line spectrum enhancer with LMS to improve the detection range of active sonar according to its characteristics.

70. The extraction of the in-phase and quadrature components from a received echo signal is an important problem in the digital beamformer of sonar systems.

71. It is an oceanographic ship that gathers underwater acoustic data(sentencedict.com), using sonar.

72. The sonar array was deployed at the time of the confrontation, and a U.

73. In this paper, a new map building method sonar data is presented.

74. Side-scan sonar is an important means of detection in hypsography, and its incorporation of computer technology has greatly promoted its development.

75. The sonar buoy testing system can emulate signal of underwater sound and detect the operating status and performance of sonar buoy.

76. The very strong property of the synthetic array sonar is the ability to acquire a high azimuth resolution from a physically small array.

77. The paper is on improving the direction model of Passive SONAR.

78. In this thesis, the signal waveforms of an active sonar in shallow waters are studied, in particular, the structure of wideband Doppler sensitive signals are emphasized.

79. By using the optimal assignment algorithm of plot-track correlation, the results obtained are satisfactory in computer simulation for sonar TWS system.

80. As an advanced underwater imaging sonar, synthetic aperture sonar (SAS) has the ability to acquire a high azimuth resolution from a physically small array, thus has a broad prospect.

81. The system of passive ranging SONAR makes use of the target noise received by the equipment which converts energy from one form to another to estimate the target distance.

82. The author puts forward that using the measurable disturbance decoupling control to compensate the influence of the boat posture on sonar array posture.

83. The evolution of the odd shaped head has long puzzled scientists and many reasons such as manoeuvrability, smell and inbuilt "sonar" have been tested.

84. In the past, sling sonar"s antisubmarine efficiency was simply managed, that was out of accord with fact."

85. Digital scan converter (DSC) is an indispensable part in the display equipment of radar, biomedical ultra sound detector, sonar, electronic surface analyzer.

86. Active SONAR provides signal for enemy when ranging pulse and this is very dangerous for submarine.

87. In this thesis, two key-techniques of high-resolution imaging sonar are studied: beam-forming and acoustical image processing.

88. At last the sonar array attitude stabilization system based on hardware and software was debugged successfully.

89. On the basis of building forward looking sonar view model and artificial potential model, decision control of AUV is made, objects are searched through grads approach, a collision free path is planed.

90. Sound reflection and sound shadow of high frequency imaging sonar detecting sea mine underwater was simulated with computer.