focus n. (pl. focuses, foci ) 1.【物理學】焦點。 2.【物理學】焦距;聚焦,對焦點,配光,對光。 3.(活動興趣等的)中心。 4.【醫(yī)學】病灶。 5.(地震的)震源。 the focus of the world's attention 世界注意的中心。 principal focus 【物理學】主焦點。 real [true] focus 【物理學】實焦點。 virtual focus 【物理學】虛焦點。 the focus of a disease 病的主要患部。 the focus of an earthquake 震源。 bring into focus = bring to a focus 使集中在焦點上配光,對光。 in focus 焦點對準,清晰。 out of focus 焦點沒有對準,模糊。 vt. (〔英國〕 -ss-) 1.使聚焦,對焦。 2.調節(jié)鏡頭、焦距等。 3.集中注意力于。 4.使限制于小區(qū)域。 vi. 聚焦,注視,調焦距;限制于小區(qū)域。 focusing cloth 【攝影】遮光黑布。
dynamic adj. 1.動力的,動力學的;力學(上)的;動(態(tài))的;起動的。 2.有力的,有生氣的;能動的;(工作)效率高的。 3.【音樂】力度;強弱法的。 4.【醫(yī)學】機能(上)的。 5.【哲學】動力論的,力本論的。 a dynamic personality 活躍的性格。 a dynamic atmosphere 生氣勃勃的景象。 a dynamic population 動態(tài)人口。 n. 〔限指 dynamic〕 (原)動力;動態(tài)。 adv. -ally
Design of dynamic focusing circuit for testing system of projection cathode ray tube with double beams 雙束投影管測試臺中動態(tài)聚焦電路的研制
Phased array ultrasonic testing can accomplish dynamic focusing , obtain visual image , inspect component of complex geometry . also it can improve detection sensitivity , resolution and snr , so it has recently been highly recognized in ndt research domain 它具有能進行動態(tài)聚焦、可進行成像檢測、可檢測復雜形狀物體、能提高檢測靈敏度、分辨力和信噪比的多項優(yōu)點,近年來正成為國際無損檢測界的研究熱點。
In this paper , at first , we analyzed the feasibility of dynamic focusing by interpolation method , and then introduced our particular design of digital - coding emission , dynamic filter , dynamic focusing and digital i / q demodulation in digital front - end based on fpga 論文首先在理論上分析了內插式數字動態(tài)聚焦實現的可行性,然后對數字前端的關鍵技術:數字編碼發(fā)射、動態(tài)濾波、動態(tài)接收聚焦、變跡變孔徑、正交包絡檢波等的fpga實現進行了詳細的闡述并給出了實現方案。
It is equipped with 120w radio frequency laser producer and cti dynamic focusing , so there is smaller light point , and larger tange of marking . besides , its forceful laser power and unparalleled processing speed makes a accurate and vivid effect possible . it costs low and need no materials . the degree of the clearness and depth of marking can be controlled freely 該機選配美國進口120w射頻激光器cti動態(tài)聚焦,光點尺寸更小打標范圍更大,加上強悍有力的激光功率,無與倫比的加工速度,實現了精確逼真的加工效果,加要成本低廉,無需耗材,標記清晰深淺度隨意控制,適用于多種你想加工的非金屬產品。