acoustic wave theory 中文意思是什麼
acoustic wave theory
解釋
聲波理論-
Surface transverse wave has the 1. 6 high frequency than rayleigh type surface acoustic wave ( using the same technology the frequency of devices of stw has about 1. 6 high frequency than rayleigh type surface acoustic wave ). the paper introduces the theory, design parament, technology and result expeiment of surface acoustic wave ( includes rayleigh surface acoustic wave and surface transverse wave, simple stw ) with low insertion loss, high q and researches the high frequency, low phase noise oscillator with 1ghz stw resonator as frequency element. and describes measurement method and finally experimantal result of the low phase noise surface acoustic wave oscillator
本文研究了以低損耗、高q值聲表面波（其中包括聲表面瑞利波- - rayleighsurfaceacousticwave ，和聲表面橫波等）諧振器的工作原理、設計參數、製作工藝及其實驗結果，並且研究了以1ghzstw諧振器為頻控元件的高頻率、低相位噪聲聲表面波振蕩器，以及低相位噪聲聲表面波振蕩器的測試方法和最終的測試結果。 -
Under the direction of the sciences of auditorium acoustics, the paper researches on the auditorium acoustics of the digital conference hall. on the basis of analysising the theory background, the paper researches on the practical construction project. the basic task of is to study the physical conditions of interior acoustic wave transmission and acoustic processing method approach to ensure a good indoor heard
本文以廳堂音質的相關理論為指導，以數字會議廳堂為主要研究目標，以會議廳堂音質設計為主要研究內容，在總結了會議廳聲學設計中各個基本概念及廳堂音質設計的基礎上，對現代數字會議廳堂的音質展開深入的研究，並理論結合實際，對具體的工程項目進行廳堂音質設計與研究。 -
Based on local coupling mode theory of graded index optic fiber wave guide, the variation regularity of coupling output light has been deduced when sound wave acts on single mode optic fiber coupler. and a new idea has been proposed that a novel sensor can be applied on detection of acoustic / vibration. the sensing element of sensor is the melting area of single mode coupler in which the feasibility of the new - type optic fiber sensor has been proved in experiment
本文從緩變光纖波導的局部耦合模理論出發，推導出了單模光纖耦合器耦合分光在聲波作用下的變化規律，提出了以單模光纖耦合器的熔融區為傳感元件的傳感器在聲振動信號檢測中應用的新思想，並實驗論證了這種新型光纖傳感器應用於實際的可行性。 -
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。 -
( 2 ) based on the wave equation in the acoustic fluid space and the theory of thin - wall structure, the non - symmetrical coupled structure - acoustic dynamic equation without damping is studied. the non - symmetric system of the finite element model for coupled structure - acoustic response is solved by the conjugate subspace iteration method
由聲空間波動方程和薄板理論出發，對聲場?結構耦合系統的模態分析提出了有限元數值方法，採用共扼子空間迭代法對非對稱特徵方程進行處理，採用靜凝聚法消除質量矩陣的奇異性。 -
In the course of theory analyses, acoustic / vibration signal acts on the coupling area of a coupler. there are two different actions - horizontal operation and vertical operation and two different transmissions - traveling wave and standing wave. the responses of the sensor analyzed with matlab shows that the length of coupling and the frequency of acoustic / vibration signal will influence the sensitivity of the sensor
理論分析過程中，聲振動信號對傳感器的耦合區有不同作用方式（橫向作用縱向作用）以及不同傳播形式（駐波傳播/行波傳播） ，用數學軟體matlab對其響應進行模擬分析，得出了耦合長度和聲振動信號頻率會影響傳感器的靈敏度。 -
This paper presents a platform that measures the tangent stress of the elastic media using critically refrected longitudinal wave ( lcr for short ) based on acoustic - elasticity theory. the primary experiments are complete in general purpose stress equipment controlled by pc
本文以聲彈性理論為基礎，設計並製作了一套基於tdc （ timetodigitalconverter ）利用lcr波（ criticallyrefractedlongitudinalwave ）測量彈性介質中的切向應力的實驗平臺，並在微機控制的萬能試驗機上進行了初步的實驗。 -
The study on single electron transportation induced by a high frequency surface acoustic wave ( saw ) has important influence on the base theory of physics, further development of semiconductor devices and the research of metrology
高頻表面聲波（ saw ）驅動下的單電子輸運問題的研究對物理學的基礎理論、半導體器件的進一步發展和計量學的研究具有重要意義。 -
In view of that the plane wave theory is suitable only in lower frequency range, the three - dimensional finite element method is applied to analyze the acoustic characteristics of air cleaner in the present study for broadening the frequency range
由於一維平面波理論只適于低頻分析，為了擴大分析的頻率范圍，採用了三維有限元數值方法分析空氣濾清器的聲學特性。 -
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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