sound speed 中文意思是什麼
sound speed
解釋
聲速-
At the same time, the relationship between the sound speed traveling through the concrete and the compressive strength of concrete are analyzed, and then * relationship equations are obtained
接著，測試了混凝土宏觀力學強度，同時對混凝土超聲波傳播速度檢測值和抗壓強度測試值進行回歸分析，給出它們之間的關系方程式。 -
Results rectify that matched field processing based on ray travel time delay is insensitive to the mismatch of sound speed proflle, although the mismatch of ocean bottom depth and receiver location is bad to matched field processing, different forms of cost fimctions could decline the sensitivity
計算結果表明，基於聲傳播時延的匹配場定位對聲速分佈失配是不敏感的。雖然接收基陣位置傾斜和海洋深度誤差對匹配場處理影響較大，但只要選擇適當的代價函數，可以得到克服。 -
The results show that the location sound speeds for the tank above has been confirmed as 1. 2 1. 4m / ms and 3. 2m / ms and the degree of the superposition of two lucy value and sound speed curves correlated directly with the pertinence of the signal. ( 4 ). introducing the flux leakage examination and the comparison made between magnetic flux leakage examination and ultrasonic testing proved that magnetic flux leakage examination can be used
分析國內不同地區（鎮海、日照、廈門） 、 12個服役9 - 19年的常壓儲罐漏磁檢測的結果，統計所存在缺陷的腐蝕程度及分佈情況，從而確定聲發射檢測的重點部位在儲罐的中間部位。 -
A perturbative shallow water tomography scheme based on the modal wave number inversion technique is considered in this paper. and it could estimate the bottom sound speed and density
論文提出了一種基於簡正波波數的擾動反演淺海聲層析方法，該方法能夠反演海底聲速和密度。 -
Knowing the bottom parameters, the influence of the mismatch of the bottom parameters for the inverted water sound speed and the relationship of the statistical distribution between bottom parameters errors and inverted water sound speed errors are studied using modal wave number tomography scheme
應用簡正波波數層析方法，在海底參數已知的條件下，研究了海底參數失配對反演的水體聲速的影響，以及海底參數誤差分佈與反演的水體聲速誤差分佈的關系。 -
Lt is obvious that the decaying rule of average reverberation intensity is affected by scattering coefficient of sea floor, sound speed profile, inclination of bottom etc. the sea floor scattering function is the most importan factor to the intensity decaying rule
結果表明：海底散射方向性指數因子、海水聲速梯度、海底傾斜角等對海洋混響平均強度的衰減皆有影響。海底散射方向性指數因子對其影響最大，即適當選取海底散射模型是淺海近程混響建模的首要因素。 -
Under these fimctions, mismatch of ocean depth, receiver location and sound speed profile have been simulated respectively
文中運用該函數分別對海底深度、接收基陣位置和聲速分佈三種失配情況進行計算機模擬研究。 -
The software adopts eofs to describe the sound speed profile in the sea, and takes its bottom depth parameters from inputed digital chart. the software can process more complex 3 - dimension sound field
軟體中採用經驗正交函數來描述海洋中的聲速剖面，海底深度參數以數字海圖的形式輸入，可以處理較復雜的三維情況下的海洋環境聲場。 -
Different results specify that the first kind of cost function is sensitive to the mismatch of ocean depth and receiver location, but is insensitive to sound speed profile ' s % $ jai8x9 @ t $ m & z mismatch and has high accuracy of depth localizaion ; the second kind of cost fimction is insensitive to all three kinds of mismatch, but its resolution of depth is very low ln order to overcome the cost function ' s sensitivity to mismatch, improvemedt of the accuracy of time delay estimation and model calculation may be adopted, when both conditions are reached, the sensitivity wiil be greatly reduced and the resolution of range and depth will be improved at the same time
模擬結果表明，第一類代價函數對海底深度和基陣傾斜失配是敏感的，對聲速失配卻不敏感，並且能夠獲得較高的深度定位精度；第二類代價函數對三種失配都不敏感，只是深度解析度較低。為了克服代價函數對失配的敏感性，可採用提高時延估計精度和模型計算精度的方法。當兩個條件滿足時，敏感性得到極大的抑制並獲得了較高的距離和深度估計精度。 -
The reasons focusing only on ray travel times are " noise tolerance could be enhanced and the sensitivity to the environment model mismatch may be reduced by neglecting amplitude information ; phase ambiguity is eliminated by employing the group delay of arriving wave packets ; travel times are pseudo - linear functions of sound speed profiles of the medium, and the perturbation of ray travel time is much smaller than sound pressure ' s
之所以選擇聲傳播時間的原因是：噪聲容限可以得到提高，並且傳播時間的計算可以不考慮聲壓的信息，從而降低了對環境模型失配的敏感性；相位的起伏也可通過到達包絡的群延時來消除；傳播時間是介質聲速分佈的偽線性函數並且傳播時間的起伏遠小於聲壓的起伏。 -
The result of a discussion about the statistical distribution shows there are different distribution forms between the data errors and estimated parameters in non - linearity inversion. the precision of estimated bottom sound speed is well than the estimated bottom density. although there is a same data errors distribution in perturbative inversion, the distribution of each inverted eof coefficient is different
統計誤差分佈的討論結果顯示：在非線性反演方法中，數據空間誤差分佈與參數空間誤差分佈不相同，這種匹配方法估計的海底聲速的準確性好於對密度估計的準確性；在擾動反演演算法中，相同的數據誤差分佈條件下，反演的eof各項系數誤差分佈不同。 -
Reseach of measuring sound speed by amplitude extreme method
振幅極值法測聲速的研究 -
The sound speed distribution of ocean is not uniform, so the sound ray is often curving because of refraction when sound transmitting through the sea channel. this means the time delay between the transmitter and the receiver is larger than the time delay between them in the condition that the sound ray is straightaway, then positioning error is caused
海洋中聲速分佈是不均勻的，因此由於折射效應，聲音在海洋通道傳播過程中其聲線是彎曲的，聲線彎曲意味著聲信號從發射點到接收點的傳播時延大於聲信號直線傳播的時延，致使定位產生誤差。 -
This dissertation studies the inversion of sound speed profile ( ssp ) in shallow water, including the effects of sediment parameters on the multi - path arrival structure, the algorithm of the ssp inversion using multi - path arrival time differences and the ssp inversion based on matched beam processing ( mbp ). 1
採用理論分析、數值模擬方法研究了沉積層參數對淺海多途到達結構的影響；推導和論證了到達時差反演淺海聲速剖面演算法、提出和研究了用匹配波束處理反演淺海聲速剖面演算法，並且應用東中國海實驗數據對這兩種演算法進行了驗證。 -
Comparison between three commonly used algorithms of sound speed
三種常用聲速演算法的比較 -
Natural stone test methods - determination of sound speed propagation
天然石料試驗方法.聲速傳播的測定 -
S3 sight sound speed
視頻音頻速度 -
Inversion of sound speed profile for shallow - water environment with experimental verification
淺水聲速剖面的反演方法與實驗驗證 -
Natural stone test methods - determination of sound speed propagation ; german version en 14579 : 2004
天然石料試驗方法.聲音速度傳播的測定 -
The effect of sediment parameters on sound speed profile inversion using time differences of acoustic ray arrivals in shallow water
淺海中沉積層參數對多途到達時差反演聲速剖面的影響
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