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ice625

铜虫 (正式写手)

[求助] 【选择题】关于吸收光谱方面的两个知识点已有1人参与

1. What is the rule of thumb for setting the bandpass, so one obtains the most accurate spectrum (highest intensity and best peak shape)? <May have to look in the Cary Instrument Manual>
a. The bandpass is the same as the peakwidth.
b. The bandpass should be half of the peakwidth
c. The bandpass should be one-tenth of the peakwidth.
d. The bandpass should be one-hundredth of the peakwidth.
e. The bandpass should be twice as wide as the peakwidth.
2. What is meant by the term data interval?
a. The data interval is a synonym for bandpass or resolution.
b. The data interval is how closely spaced the digital points are taken in the attempt to make a representation of the analog signal.
c. The data interval is how closely spaced the analog points are taken in the attempt to make a representation of the digital signal.
d. The data interval is the total range of wavelengths that you scan during a spectroscopic analysis.

求大神解答这两道题,用简单的一两句话解释一下,多谢
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leefadisky

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【答案】应助回帖

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ice625: 金币+5, ★★★很有帮助 2014-10-13 14:15:27
1、the Cary Instrument Manual我没看过,因为我们不用安捷伦的仪器。本题我觉的选e,既然想获得highest intensity and best peak shape,那就得包含整个
peak区域,但是你很难控制到刚刚好,所以2倍是比较好的做法
2、术语data interval,我们认为是采样间隔,现在的电子处理核心都是数字的二进制,所以所有的数据必须是数字的,对于模拟信号则只能采取间隔的数字点来表示,数据间隔就是这样两个数字点的间隔

你看看,有疑问我们再交流
2楼2014-09-05 09:29:10
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leefadisky

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b我忘记说第二题的选择了
3楼2014-09-05 09:31:22
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