水中信號 的英文怎麼說
中文拼音 [shuǐzhōngxìnháo]
水中信號
英文
submarine signal-
Based on the demand of power department, a full distributed multifuncitional monitoring device is studied. this instrument not only can measure the data of hydroelectric plant, but also integrate the funcition of control the dynamotor, by cooperate with the program of epigynous system, it can realization the auto generate electricity on the hydroelectric plant and ordinal startup - stop of the dynamotor. 2 furthermore, performance of integrated dft arithmetic enhances the acturacy and reliability of measure. by communication several devices can run online to be controlled dispersedly and managed centrally
本文分析了國內外水電站自動控制裝置的研究和發展狀況，尤其是國內小型水電站的自動化現狀，針對現有電力部門的需求，設計並實現了一種單元式的微機自動監控裝置，該裝置不僅實現了對水電站內各種模擬參數和數字信號的實時監測功能，還對水輪發電機組進行了調控，通過與上位機處理程序的配合，可以實現水電站的自動發電控制、機組順序啟停；在測量發電機組機端電壓和電流參數的時候，採用32點離散傅立葉演算法（ dft ） ，增加了測量的準確性和可靠性；通過通訊可以實現裝置的聯網運行，做到「分散控制、集中管理」 。Through the inspecting, the author selected three methods of eradiate noise ' s feature extraction. the methods include the pedigree, e - filter, fractal. in those methods, the pedigree is based on frequency field, the e - filter is based on the energy field and the fractal is based on time field
本文作者經過考察，採用了三種前期研究中較為有效的水下目標特徵提取方法? ?基於功率譜估計的線譜特徵提取方法、基於小波分析的不同頻段內能量特徵提取方法和基於水聲信號分維特性的特徵提取方法。1, cut over a head : bring up to combine the applied technique most and early for the toshiba, and is also current usage to is the most extensive. he adopts a laser head, and prepare the different slice of 2 focal distances the sony for cut over, passing the conversion differently focusing the coming respectively reading dvd with cd, its shape looking with double head to resemble respectively, because can see two sets focuse the, laser head to interiorly can t see. he reads the signal quantity is higher, but because of want the conversioning to focuse the, therefore the cost belong to the inside and so forth of level, and recognize the dish speed slow, same the implicit mechanical trouble rate is high
1切換雙鏡頭：為toshiba最早提出並應用的技術，也是目前使用最廣泛的。他採用一個激光頭，分別準備2個焦距不同的鏡片切換，通過轉換不同的聚焦鏡來分別讀取dvd和cd ，它的外形看起來與雙頭的sony相似，因為只能看到二組聚焦鏡，激光頭在內部看不見。他讀取信號質量較高，但由於要轉換聚焦鏡，所以成本屬于中等水平，認盤速度較慢，同樣隱含的機械故障率比較高。During the heat accumulator supplying to users, the electric boiler usually try to make heat by starting at low price of electric and stopping at high. in general, the system of electric boiler with heat accumulator runs according to experience to utilize the time - of - use electricity price or controlled by the signals of water level or temperature
當前運行的蓄熱式電鍋爐供熱系統中電鍋爐的啟停控制一般有兩種方式：一種是根據分時電價和用戶熱負荷由人工啟停，另一種是根據蓄熱器的水位或水溫信號由自動控制裝置啟停。This system use the floater style sensor, mechanical encoder to get water - level signal, and use the at89c51 single chip system to transform the signal into water - level data, use modem through pstn to transmit data for a long - distance, and designed a information management software system hi the irrigation works bureau information center for communication and data management. the structure of the system was discussed in the thesis
該系統使用浮子式傳感器、機械式編碼器獲取水位信號，利用at89c51單片機系統採集水位數據（簡稱：下位機系統） ，採用數據機、通過公共電話網（ pstn ）遠程傳輸數據，並在泰興市水務局信息中心通過主控計算機（簡稱：上位機）進行通信及信息系統管理。An survey of matched - field processing in acoustical signal processing
水聲信號處理中匹配場處理技術研究的現狀和展望Passive ranging is one of the difficulties in the field of underwater sound signal processing
被動精確測距一直是水聲信號處理中的困難之一。Application of the denoising wavelet - pocket energy method to the recognition of underwater acoustic signal
去噪小波包能量法在水聲信號識別中的應用In traveling through the sea, an underwater sound signal is affected by many factors and takes much information of the ocean
水聲信號在海洋中傳播時受到各種海洋環境因素的影響，攜帶了大量的海洋環境信息。The " simple " method based on cwt is inducted to underwater signal processing to estimate the instantaneous frequency of echo. in essential, this method is to extract the wavelet ridge from the maximum of continuous wavelet transform, according to the corresponding relationship between wavelet ridge and signal frequency, finally to obtain the estimated instantaneous frequency
文中將基於連續小波變換的『 simple 』方法引入到水下信號的瞬時頻率估計中來，也即通過尋求連續小波變換幅值的最大值來得到小波脊，再根據小波脊與信號頻率之間的對應關系，最終完成信號的瞬時頻率估計。Narrowband watermarking information is spread into wideband pseudo - random code before being embedded by modifying the scale of the distance between vertexes in two - dimensional engineering graphics
該方案先將待嵌入的窄頻帶的浮水印信號擴頻為寬頻帶的偽隨機序列，然後再以偽隨機序列為依據對二維工程圖中直線實體的長度作相應的修改。Then we use lifting scheme improve wavelet analysis methods and proposed a kind of digital watermark algorithm based on error - correcting coded which is a method of communication theory and is to correct watermark signal
然後在這一水印演算法的基礎上，使用小波提升技術來改進小波分析方法，再使用通信理論中的糾錯編碼方法對水印信號進行糾錯控制，並提出了一種基於糾錯編碼的數字水印演算法。During underwater signal processing, parameter estimation and target identification are two kinds of important problems
在水下信號處理中，參數估計和目標識別是兩類非常重要的問題。By analyzing and processing the underwater sound signals received on the array, we can get the parameters of ocean environment. compared with traditional methods of direct point measurement, ocean acoustic tomography has obvious advantages : much simpler and more effective, and it can continuously monitor ocean environment in a large area for a long time
海洋聲層析技術通過分析處理水聲接收基陣接收到的海洋通道中的水聲信號來反演海洋環境參數，這種方法方便、高效並且可以進行長時間的大范圍連續監測，與傳統的直接測量的方法相比有明顯的優勢。The chaos sequence was applied in these two algorithms to increase its security and was served separately as the random watermark generator and the watermark image encryption techniques. due to the analysis of the image characteristics, we determined the watermark strength by the classification of the image content and obtained better robustness and imperceptibility. new algorithms of meaningful digital watermarking in svd domain with chaotic transform encryption are proposed
混沌序列在這兩類演算法中分別作為隨機水印信號發生器和二值圖像水印的混沌加密手段，具有安全性高、形式簡單的優點；利用hvs特性，分別在時空域和dct頻率變換域中計算圖像內容的自適應嵌入強度，增強了演算法的穩健性；水印的嵌入和檢測計算復雜度小，演算法簡單。This paper is focused on images watermarking algorithms. watermark casting operates in frequency domain, embeds pseudo - random sequence of real number in selected coefficients without image degradation. a blind watermark retrieval technique that can detect the embedded watermark without resorting the original image is proposed, so that the proposed techniques represents a major improvements to those relying on the comparison between the watermarked and original image, which is not practical for a huge image database
本文主要研究針對圖像水印系統的演算法研究，採用偽隨機序列作為水印信號，利用變換域系數作為水印的載體，在不降低圖像質量的前提下達到嵌入水印的目的，在恢復水印的過程中無需原始圖像的參與，相比較那些需要利用原始圖像恢復數據的系統，文中所提出的方案更具有實用性。In this paper we adopt pseudo - random sequence or gray level image as the watermark, choose the dwt coefficients as the carrier, then embed the watermark into the carrier imperceptually. one algorithm accomplishes blind extracting. it presents a symmetric algorithm based on shuffling technique
採用偽隨機序列或灰度圖像作為水印信號，利用dwt變換系數作為水印的載體，在不降低圖像質量的前提下達到嵌入水印的目的，部分方案在恢復水印的過程中無需原始圖像的參與。Reeenly, with the development of underwater acoustic technology, matched field processing tecboques have been widely used in source localization and become one of the most boortan methods of acoustical signal processing
近年來，隨著水聲技術的不斷發展，匹配場處理技術在聲源定位中得到了廣泛應用，已經成為水聲信號處理的重要手段之一。The watermarking scheme based on wavelet decomposition and discrete cosine transform using a binary pattern or gray - level pattern as the watermark, the scheme initially performs wavelet decomposition of the host image and the watermark with different hierarchy. after the pseudo - random permutation, each decomposed layer of the watermark is embedded into the dct domain of corresponding decomposed layer of the host image
基於小波分解和餘弦變換結合的水印方案演算法以二值圖標或灰度圖標作為水印，將原圖像和水印信號分別進行不同層次的小波分解，分解后的水印各分量偽隨機置亂後分別嵌入到原圖像相應分解層各分量的dct域中。Second discusses adaptive filter ' s application in measuring frequency of cw sonar pulse signal and in towed linear array sonar signal processing. simulation is made about adaptive filter ' s application. simulation result shows that adaptive filter is very powerful tool for underwater acoustic signal processing
接下來本文討論了自適應濾波器在cw聲納脈沖信號測頻和拖曳線列陣聲納信號處理中的應用，並進行了模擬研究，模擬結果表明自適應濾波器是處理水聲信號的十分有效的工具。分享友人