混響回波 的英文怎麼說
中文拼音 [húnxiǎnghuíbō]
混響回波
英文
reverberating echo-
Estimating a dynamical trajectory of the reverberation and then taking it out from the observation, all target echoes should be obtained. that is called signal separation
信號分離是指在相空間中估計混響動力學軌道，從觀測中減去估計的混響，從而分離出目標回波。The main research advances can be summarized as follows : ( 1 ) study the signal processing ' s performances and methods of homing torpedo system comprehensively, in order to setting up a corresponding mathematical models ; ( 2 ) analyze the ocean channel ' s effects on the work of homing system, then found some models such as target echo signal, noise ( including background noise, target radiating noise, etc ), ocean reverberation. according to them, simulate the array signal ; ( 3 ) the system structure, every function blocks composing are studied and founded thoroughly. then, discuss methods of signal processing in time domain and airspace domain ; ( 4 ) program the simulation software of torpedo ' s homing system according to the simulation models and flow charts, which connected with torpedo ' s control part
本文所作的主要工作及研究成果主要有以下幾個方面： （ 1 ）對自導工作過程中的信號與信息處理的基本理論與方法進行了較為全面的研究，為建立一個較為完備的自導模擬系統提供了理論基礎； （ 2 ）討論了自導系統工作過程中海洋通道對目標回波信號與目標輻射噪聲信號等的影響，建立回波信號的數學模型、環境場中的噪聲信號模型（包括海洋環境噪聲、目標輻射噪聲與魚雷背景噪聲等）與海洋混響模型，模擬產生了聲自導系統基陣接收到的回波信號與噪聲信號； （ 3 ）深入研究並建立了自導模擬系統的總體框架，給出各個具體功能模塊組成，討論了聲自導系統對信號的時域與空域處理，並結合模擬程序中陣列信號處理模塊，給出固定多通道波束形成的模擬實現過程； （ 4 ）根據系統的模擬模型與已建立的模擬流程圖編制了通用魚雷模擬器自導系統模擬軟體，通過網路與控制系統相連，組成完整的魚雷模擬器。Echo extraction from bottom reverberation based on chaos
基於混沌理論的海底混響中目標回波提取Higher capabilities were put forward for detection, identification and anti - interference of torpedo in future naval battle. compared with the narrow - band processing, wide - band processing is a new direction for underwater signal processing for its advantages including abundant information of wide - band echo and little correlation of reverberation
未來海戰對魚雷在探測目標、識別目標和反對抗能力方面提出了更高的要求，而寬頻帶回波信號具有攜帶目標信息量大，混響背景相關性弱，利於檢測、識別目標等優點，因此自導系統發展的方向是寬頻帶自導。The results show that ( 1 ) the " prediction & cancellation " method can successfully smooth the reverberation and sharpen edges of the echo, so may detect echoes which power are great than the reverberation background by odb in one channel, ( 2 ) the scaled probabilities method can effectually separate a echo which power is great than the background by 6db, while the reverberation is cancelled dr astically
果。計算結果表明， 「預測一抵消」演算法對混響有平滑作用，對回波則有突出信號邊緣的作用，單通道情況下的最小可檢測信號干擾背景功率比約為odb 。概率凈化演算法在信號干擾背景功率比大於6db的情況下能有效分離回波、抑制混響。The arithmetic formulas for sine wave, linear frequency modulation signal, v - style frequency modulation signal, white noise signal, reverberation signal and echo signal are given by their definition
根據信號類型的定義，給出了正弦信號、線性調頻信號、 v型調頻信號、白噪聲、混響和回波信號的合成公式。With regard to some specific problems encountered in the process, the pointed answers are given by way of simulative experiments in laboratory. those problems are as follows : the relation between rt curve and rasti, different impacts caused by different acoustic characteristics on different standing waves, the changes of acoustic quality derived from different positions of sound absorption materials
而對此過程中遇到的某些特定問題，如：混響時間頻率特性與清晰度的關系，不同聲學特性對駐波的影響，吸聲材料擺放位置不同帶來的音質的變化等，則以在實驗室模擬實驗的研究方式予以針對性的回答。Relationship between concrete compression strength and rebound and ultrasonic speed value was studied by test. special regressive equation was obtained to predict concrete compression strength. also, empirical regressive equation was got to predict the temperature acting on concrete structure
試驗研究了火災高溫后並考慮靜置時間影響的混凝土抗壓強度與回彈值、超聲波速值之間的關系，得出了利用回彈法、超聲法和超聲回彈綜合法評定火災后混凝土抗壓強度的專用測強公式；得出了利用超聲法推定混凝土受火溫度的經驗回歸公式。Concrete compression strength was predicted by artificial neural network ( ann ) considered three factors, such as temperature, standing time and cooling and curing process after cool. also it was predicted in different rebound and ultrasonic values. fire resisting performance of concrete was studied and predicted
通過人工神經網路（ ann ）方法預測了火災后考慮不同受火溫度、靜置時間、冷卻及冷卻后的養護方式三種影響因素的混凝土抗壓強度；預測了火災后考慮不同回彈值、大連理工大學博士學位論文一超聲波速值等因素的混凝上抗壓強度，研究並預測了火災后混凝土的抗火性能。The effect of separation algorithm is analyzed by use of measured data in the lake or sea
用實測混響和目標回波數據研究演算法的信號分離效分享友人