scan vt. (-nn-) 1.细看,细察;审视。 2.〔口语〕大略一阅;浏览。 3.按韵节念,按句调读,标出(诗)的格律(指划分音步)。 4.【电视】扫描;扫掠;搜索。 vi. 1.(诗)符合格律,读起来抑扬顿挫。 2.【无线电】扫描。 This line does not scan. 这一行不合韵律。 n. 1.细看;细察。 2.扫视,浏览。 3.【电视】扫描;扫掠。 4.眼界;视野。
frequency n. 1.屡次,频仍,频繁。 2.(脉搏等的)次数,出现率;频度;【物理学】频率,周率。 audio frequency音频。 a high [low] frequency高[低]频。 the frequency of earthquakes in Japan 地震在日本的频繁发生。 mean [median] frequency中频。 resonance [resonant] frequency谐振频率,共振频率。 ultrahigh frequency超高频。 ultralow frequency超低频。 very high frequency甚高频。 very low frequency甚低频。
3 . scan frequency is over 200hz : using over 200hz frame scan frequency will have good vision effect 3扫描场频大于200赫兹:使用帧扫描频率200hz以上,有很好的视觉效果,人肉眼几乎
Scanning frequency has reached over 240hz which makes the menu stable and no flicker . in using actually , we use vidicon shoot the display screen . and then we can observe the photo is very clear from the vidicon 2扫描场频达到了240hz以上,画面稳定无闪烁,在实际应用中,用摄像机拍摄显示屏,摄像机中观测到的图象十分清晰,没有同步滚动条,若现场有电视转播,显示屏不会影响转播画面的质量。
By the advantage of high precision , strong anti - interference ability , long lifespan , etc , grating scale is the chief sensor in displacement measurement . however , as is restricted by the beam path structure , the scan frequency of the scaning circuit , etc , the maximum available measuring speed has a inverse proportion relationship to the measuring pace of a single grating scale 光栅尺具有精度高、抗干扰能力强、寿命长等优点,成为微纳米位移测量的主要工具,但由于受光路结构及信号检测电路扫描频率等因素的限制,单个光栅尺测量的最大允许移动速度与其测量步距成反比。