underwater acoustic 中文意思是什麼

underwater acoustic 解釋
水下吸收儀
  • underwater : adj. 1. 在水下的，水中的。2. 用於水下的。3. 【造船】吃水線以下的。adv. 1. 在水下。2. 【造船】在吃水線以下。n. （海洋等）水面下的水；水下，水底。
  • acoustic : adj. 1. 聽覺的；聲學的。2. 助聽的；傳音的。3. 原聲的，不經過電子設備傳聲的。adv. -tically 在聽覺上；在聲學上。
  1. Digital speech technology has been widely used in many fields of communications in recent years, but it is just at beginning to use acoustical wave to implement underwater digital speech communications, which mainly results from the bandwidth - limited underwater acoustic communications channel and its high temporal and spatial variability

    目前，數字語音技術已廣泛應用於許多通信領域，但是在水下利用聲波進行數字語音通信卻是剛剛起步的新技術，這主要是由於水聲通道有限的通信帶寬及其時變、空變等特性所決定的。
  2. The method of counterwork effectiveness of the uace has an important reference value for researching the uace and the underwater acoustic countermeasure system

    該效果評估方法對水聲對抗器材及水聲對抗系統的研究有著重要的參考價值。
  3. The thesis mainly consists of : in chapter 1, on the ground of demanding background of the task, illuminate the urgent and important of the system on the manufacture and the embattle form of the buoy and methods about the experiments during synthesis experimentations that seeing about ocean underwater acoustic environment

    全文從以下幾個方面進行了論述：在第一章里，從項目需求背景出發，說明研製本系統的緊迫性和重要性，概述了在海洋水聲環境綜合考察試驗中，浮標的布陣形式及實驗方法。
  4. On the emulation of underwater acoustic echo

    聲吶目標回波的理論和模擬器研究
  5. In this thesis, for the merits of high frequency spectrum utility factor and high - speed data communication, the ofdm is introduced into the underwater acoustic communication. combined with fec to combat the frequency - selective fades and isi in the underwater acoustic channel, high speed data transmission is realized by employing ofdm technology

    本研究嘗試將ofdm技術引入水聲通信領域，利用該技術頻譜利用率高，多載波并行傳送的特點，結合通道編碼，以克服水聲通道多徑干擾引起的頻率選擇性衰落和碼間干擾，獲得高速率數據傳輸。
  6. This paper is combined with the project of research of underwater acoustic network technology. first, we study and research existing uan and its protocols at home and abroad

    首先學習、研究了現有國內外有關通信網路及其協議，並對國外現有水聲通信網路進行了較深入的研究和分析。
  7. " l ' lle brief introduction of underwater acoustic channel and the cl1art of image transmission syste111, innovation of ti1is paper are given in the first chapter. basic technology and hardware using in this project are introduced in the seco11d chaptel transform methods, especially the wavelet transformation are introdtlced il1 the tl1ird cllapter. ii11age ' s coding methods are introduced in cl1apter four, witll tilem ti1e zero tree method is the el11pl1ases

    第一章給出對水聲通道特性簡介以及圖像信息傳輸的系統框圖、本研究創新之處；第二章介紹圖像處理的基本技術以及本研究的硬體環境；第三章介紹圖像數據的變換方法，著重介紹了小波變換涉及到的知識；第四章介紹圖像編碼，重點介紹了零樹法編解碼；第五章介紹本研究的軟體、硬體設計、對零樹法的具體改變。
  8. Based on the analysis and study of the primary principle and countermeasure process of the underwater acoustic countermeasure equipments, the mathematical models of the typical underwater acoustic countermeasure equipments such as the wide - band noise jammer target radiation noise simulator echo simulator and the gas bubble are presented

    在詳細分析、研究水聲對抗器材有關基本概念、基本工作原理及對抗過程的基礎上，歸納、總結了噪聲干擾器、目標輻射噪聲模擬器、主動回波模擬器及氣幕彈等當前典型水聲對抗器材的數學模型。
  9. The feature parameter extraction methods of the underwater target are studied which can improve the performance of the underwater acoustic countermeasure equipments. several feature extraction methods such as the scale invariance feature extraction, target pole extraction fourier - mellin transform etc are investigated by computer simulations. the experimental results demonstrated the efficiency of these feature extraction methods in the applications of underwater target recognition

    對多種特徵提取方法如目標相對不變尺度特徵提取、目標極點特徵提取、目標信號的傅里葉?梅林變換特徵提取等進行了模擬研究，結果表明了這些特徵參數提取方法的有效性，具有良好的應用前景。
  10. Performance analysis of underwater acoustic digital communication system in a shallow water channel

    淺海通道水聲數字通信系統的性能分析
  11. An energy - efficient routing protocol for underwater acoustic sensor networks

    一種能量高效的水下傳感器網路路由協議
  12. In order to achieve high data rates on the severely band - limited underwater acoustic ( uwa ) channels, bandwidth - efficient modulation techniques must be employed, together with some sophisticated signal processing algorithms, such as adaptive equalization technique for the intersymbol interference caused by channel multipath propagation

    在帶寬嚴重受限的水聲通道中實現高數據率通信，必須使用高帶寬利用率調制技術，並結合自適應均衡等技術以有效地克服通道多途傳播產生的符號間干擾。
  13. The design of control and communication software : the software realized the communication of the five bouys with the control vessel and the acoustic emission vessel ; it controls the data acquisition system, it restricts the five bouys in the remote instructions from the control vessel and the acoustic emission vessel, and it also transmits the position and time information from dgps, the bearing information of the underwater acoustic construction from a electronic compass of type of tcm2 when in collection period of time

    控制和通信軟體設計：各浮標工作在指揮船和發射船遙控指令內容的約束下，控制和通信軟體實現了浮標與指揮船以及發射船的通信，控制數據採集系統工作，並在採集時段完成gps位置、時間與矢量水聽器方位信息的傳輸。
  14. The underwater - radio buoy for use as obtaining the ocean " s acoustical parameters is a underwater acoustic signals record system which has long distance radio remote control and data transmit function. the technology key of the dissertation study is that under the requirements of the system the monitor and record equipment on the acoustic source vessel, the monitor and record equipment on control vessel command and control the work slate of the buoy system by radio data transmitting mode of short wave transmitter - receiver

    海洋環境參數獲取浮標監測系統屬于具有長距離無線電遙控?數傳功能的水下聲信號接收記錄系統，本論文研究目標的技術關鍵在於根據系統要求，指揮船和發射船監控記錄設備通過短波電臺以無線數傳方式，對浮標系統的工作狀態進行指揮和控制，浮標則通過同一短波通道向指揮船上報浮標方位、工作狀態、關鍵數據及非常狀態下的報警信號等。
  15. With the characteristics of the underwater acoustic channel, media access control protocols at data link layer adopt the maca protocol which uses rts - cts exchange to solve the hidden and exposed situation and automatically control power

    在數據鏈路層的設計中針對水下聲通道的特點，對于介質訪問控制協議採用了maca協議，它使用rts - cts控制報文握手機制來解決uan中的隱蔽終端、暴露終端以及功率控制問題。
  16. 2. a uwa communication system is designed, lake experiments are also conducted with several equalization methods being employed. one key of the techniques in underwater acoustic communication - synchronization technique is studied

    在吉林松花湖作了水聲通信試驗，驗證了上述演算法的模擬結論，並對水聲通信的關鍵技術之一的相關同步技術進行了分析研究。
  17. Underwater acoustic imaging teclmology has played an irreplaceable role in many situations. wth wide applying foreground, it has been paid more attention

    水下聲成像技術在水下探測領域中的諸多場合發揮著不可替代的作用，具有廣泛的應用前景，日益得到人們的重視。
  18. The underwater acoustic signal is the main information for the underwater detection and identification system, so it is very important to get the acoustic signal efficiently

    摘要水下聲信號是水下探測系統實現對水中目標遠程探測識別的主要信息之一，有效獲取水下聲信號是一個十分重要的問題。
  19. Underwater acoustic resistance

    水下聲阻抗
  20. It is well known that array processing technique is a main branch of underwater acoustic signal processing and multi - target parameter estimation

    陣列處理是水下聲信號處理的重要組成部分，是進行水下目標參數估計的重要環節。
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