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- solid acoustical lens 固体声透镜
- 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? 声透镜常用来修正声束形状,用液浸法从管子内壁进行探伤时,应使用哪咱类型的透镜?
- Four parts are included: acoustic lens, mechanics I electronic circuitsand microcomputer system. 声显微镜由声镜、机械部件、电路和微机软硬件组成。
- It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduce. 主要内容:1.光声信号声透镜层析成像方法的提出,并依基耳霍夫衍射理论推导了声透镜的脉冲响应。
- lens, solid acoustical 固体声透镜
- 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. 论文针对智能猪用柱形曲面声透镜水浸式线聚焦探头,建立了其声场模型,并对其轴线声场和焦距进行了数值模拟。
- 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. 利用菲涅耳衍射理论推导出了单频点声源经过单声透镜后的点扩展函数、有一定带宽的点声源经过单声透镜后的点扩展函数,以及有一定带宽的点声源经过我们设计的混合声透镜后的点扩展函数。
- This lens can magnify 20 diameter. 这个透镜能放大20倍。
- Some adjustment of the lens may be necessary. 可能有必要调节一下镜头。
- Do you have soft contact lens care product? 有没有软性隐型眼镜保养用品?
- He uses lens to make things appear clearer. 他用镜片以便看东西更清楚些。
- The lens is often used to make telescopes. 镜片常被用来做成望远镜。
- Cheese is a solid; milk is a liquid. 乾酪是固体,奶是液体。
- Simulation research on acoustic lens beamforming 声透镜波束形成技术仿真研究
- Solid fuel motors are coming into use. 固体燃料马达即将开始使用。
- The country was solid for peace. 全国上下都希望和平。
- Water becomes solid when it freezes. 水结冰时便变成固体。
- Don't smear the lens; I've just polished it. 别把镜头弄脏了,我刚刚擦过。
- The miners were solid on this issue. 矿工们在这件事上是一条心的。
- Matter can exist as a solid, liquid, or gas. 物体存在的形态有固体,液体,气体。