acoustic wave propagation 中文意思是什麼

acoustic wave propagation 解釋
聲波傳播
  • 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。
  • wave : n 〈美海軍〉女志願軍人〈見 WAVES 條〉。n 1 波浪；碎浪； 〈the wave（s）〉 〈詩〉海。2 波動；波狀...
  • propagation : 持續培養
  1. The disturbance is sound wave, conforming to the laws of acoustic propagation in solids.

    這種擾動是種聲波，它遵從在固體中聲波的傳播規律。
  2. In this dissertation, the numerical computation for the acoustic radiation problem ( arp ) is studied deeply and systematically in the theory, method and the application technique, based on analyzing the situation of the home and abroad on the numerical computation for the acoustic radiation problem. the calculation formulas of the boundary element method ( bem ) for the exterior acoustic radiation problem in the full - space and half - space are deduced, based on the wave propagation theorem ; the arising of the non - unique solutions, which is associated with the application of the boundary integral equation ( bie ) in acoustic radiation problem, is analyzed and proofed ; the improved combined helmholtz integral equation formulation ( ichief ) is presented to overcome the non - uniqueness problem more effectively and reliably ; the determination of the singular integral coefficients on various occasions is analyzed ; the properties and treatments of the singular integrals with different orders axe studied ; the computation program of the cubic spline ichief is developed and its ability to overcome the non - uniqueness problem and feasibility to discrete the surface coarsely with the sufficient calculation precision are examined through examples

    第二章在聲波動理論基礎上，詳細地推導出對應于無限域和半無限域的外部振動聲輻射問題的邊界積分方程計算公式；根據fredholm積分理論，對利用邊界積分方程計算振動聲輻射問題過程中解的非唯一性的產生進行了分析和證明；改進了chief法以提高其克服解的非唯一性的有效性和可靠性；對不同條件下奇性系數的計算、強奇性積分的收斂性及其在變量替換時與普通積分的差異性、不同階奇性積分的計算、數值求積分等進行了研究；開發了三次樣條改進chief法計算軟體，並通過算例考核了該方法在特徵波數處克服解的非唯一性的有效性和在保證計算精度的前提下實現剖分粗化以提高計算效率的可行性。
  3. From the point of kinematics and dynamics, the author analyses the propagation rules of stress waves in concrete, namely time - space relations, wave amplitude attenuation, dispersion effect and characteristics of transmission of reflected waves and acoustic waves. combining with engineering practices, the author also concluded the main points of low strain detection of integrity of longdiameter underwater cast - in - situ piles, and pointed out that comprehensive and relational utilization of reflected waves method and acoustic wave transmission method can accurately evaluated the integrity of pile shaft and then improve the reliability of detection. 6figs., 3refs

    從運動學和動力學角度，分析應力波在混凝土中的傳播規律：時空關系、波幅衰減、頻散作用以及反射波與聲波透射的特點，結合工程實踐，總結大直徑水下灌注樁低應變檢測的工作要點，指出綜合、合理運用反射波法與聲波透射法，可以較準確地評價樁身完整性，提高檢測結果的可靠性.圖6 ，參3
  4. An acoustic wave propagation model in low frequency multi - layered media of shallow sea

    淺海低頻多層介質中聲傳播損失的數學模型
  5. Chapter 2 introduces the surface acoustic wave propagation property in piezoelectric substrate and the wireless sensing principal of passive saw resonator ; explains the construction, operation principal and flow process chart of the wireless interrogating system

    第二章介紹了壓電體中saw的傳播特性和saw諧振器型傳感器的工作原理，並對無線查詢系統（中國專利， zl0222116022 ）的組成、工作原理、工作流程做了必要的描述。
  6. Finally, the results are compared with periodic and random chains. then we studied acoustic wave propagation in 1d quasiperiodic and aperiodic systems by means of he transfer matrix. transmission rate, reflection rate, energy flow, logarithmic energy flow, energy density and lyapunov exponent are computed numerically, and compared with periodic and random system

    其次研究了聲波在幾種一維準周期和非周期系統中的傳播，通過轉移矩陣的方法，數值地得到了系統的傳播系數t _ n 、反射系數r _ n 、能流密度j _ n ，能量密度e _ n和lyapunov指數，給出了以上各量與傳播長度n以及頻率之間的關系，同時發現能流及能量密度都具有分形結構，並與周期和隨機系統的結果作了比較。
  7. So the acoustic wave is the only practical solution in this channel. an underwater acoustic channel is characterized as a multi - path channel due to signal reflections from the surface and the bottom of the sea. because of wave motion, the signal multi - path components undergo time - varying propagation delays that result in signal fading and inter - symbol interference ( isi )

    本文從分析淺海水聲通道的傳輸特性入手，針對多途徑效應引起的幅度衰落及碼間干擾問題，提出一種適用於水聲e - mail通信的十六進制（或八進制）數字頻移鍵控（ mfsk ）傳輸系統。
  8. In chapter four, by using reductive perturbation technique, ion acoustic solitary wave in weakly relativistic plasmas under transverse perturbation, the propagation of solitons in an inhomogeneous dusty plasma and the modulational instability of dust - acoustic waves in warm dusty plasmas are all discussed respectively

    論文第四章分別研究了弱相對論等離子體橫向擾動下的離子聲孤波、非均勻塵埃等離子體中孤子的傳播和塵埃等離子體中塵埃聲波的調制不穩定性。
  9. Abstract : based on the wave equation, this paper describes the underwater acoustic propagation by a wave guide model, and computes the model

    文摘:通過求解波動方程建立了水聲在波導中傳播的模型並進行了模擬計算。
  10. For the mechanism of the phenomenon of " local resonance " in a compound ultrasonic vibration system, and explanation is proposed, based on the well - known theory of production and propagation of acoustic wave in a rod or shell

    摘要對超聲復合振動系統中的「局部共振」現象，基於熟知的棒或管中聲波產生和傳播的理論，提出一種機理解釋。
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