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- solid acoustical lens 固體聲透鏡
- Four parts are included: acoustic lens, mechanics I electronic circuitsand microcomputer system. 聲顯微鏡由聲鏡、機械部件、電路和微機軟硬體組成。
- It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduce. 主要內容:1.光聲信號聲透鏡層析成像方法的提出,並依基耳霍夫衍射理論推導了聲透鏡的脈衝響應。
- The paper focuses on the immersion line-focusing ultrasonic transducer with cylinder curved acoustic lens used in intelligent pig,establishes a mathematical model of acoustic fields,calculates its acoustic field distribution and focal length. 論文針對智能豬用柱形曲面聲透鏡水浸式線聚焦探頭,建立了其聲場模型,並對其軸線聲場和焦距進行了數值模擬。
- Discussed the achromatic principle of our hybrid acoustic lens system by deducing the point spread function of a point source with a bandwidth through the different imaging system. 利用菲涅耳衍射理論推導出了單頻點聲源經過單聲透鏡后的點擴展函數、有一定帶寬的點聲源經過單聲透鏡后的點擴展函數,以及有一定帶寬的點聲源經過我們設計的混合聲透鏡后的點擴展函數。
- Simulation research on acoustic lens beamforming 聲透鏡波束形成技術模擬研究
- acoustic lens focused transducer 聲透鏡聚焦探頭
- STUDIES ON ACOUSTIC LENS IMAGING OF PHOTOACOUSTIC SIGNAL 光聲傅里葉變換成像理論
- Photoacoustic tomography imaging based on an acoustic lens imaging system 基於聲透鏡成像系統的光聲層析成像
- Cheese is a solid; milk is a liquid. 乾酪是固體,奶是液體。
- Solid fuel motors are coming into use. 固體燃料馬達即將開始使用。
- Acoustical lenses are used commonly for contour correction. When scanning the inside of a pipe section by the immersion method, which of the following lens types would be used? 聲透鏡常用來修正聲束形狀,用液浸法從管子內壁進行探傷時,應使用哪咱類型的透鏡?
- The country was solid for peace. 全國上下都希望和平。
- Water becomes solid when it freezes. 水結冰時便變成固體。
- The miners were solid on this issue. 礦工們在這件事上是一條心的。
- Matter can exist as a solid, liquid, or gas. 物體存在的形態有固體,液體,氣體。
- There was a solid vote in favour of the proposal. 提案獲全體一致通過。
- Opened the show with an acoustic set. 不用電子樂器開始演出
- When water freezes, it becomes solid. 水結冰時變成固體。
- The students are learning solid geometry. 這些學生正在學習立體幾何學。