peak-to-background ratio
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peak-to-background ratio
peak-to-background ratio
peak-to-background ratio
峰/背比(P/B)
特征X射线的强度与背底强度之比称为峰背比P/B,在进行高精度分析时,希望峰背比P/B高.按照札卢泽克(Zaluzec)理论,探测到的薄膜试样中元素的X 射线强度N 的表示式如下:
N=(IσωpN0ρCtΩ)/4επM
式中:
I——入射电子束强度;σ——离化截面;ω——荧光产额;
p——关注的特征X射线产生的比值;N0——阿弗加德罗常数;ρ——密度;
C——化学组成(浓度)(质量分数,%);t——试样厚度;Ω——探测立体角;
ε——探测器效率;M——相对原子质量.
如果加速电压增高,产生的特征X 射线强度稍有下降,但是,来自试样的背底X射线却大大减小,结果峰背比P/B 提高了.
最高值和最低值的比率
peak-to-background ratio
peak
10v sinusoidal supply 是等於peak to peak
Background to your pain my
background.
background
to function at your peak怎么翻译~
MAtlab的一段程序希望有人解答.help cheby1CHEBY1 Chebyshev Type I digital and analogfilter design.[B,A] = CHEBY1(N,R,Wp) designs an Nth order lowpass digital Chebyshevfilter with R decibels of peak-to-peak ripple in the passband.CHEBY1return
We saw the white peak of mountain against a brilliant ___ of blue sky.A,background B,scenery C,climate D.surrounding
英语翻译Rectifier output shall be 5.2 volts peak to peak ripple maximum and 5.2 volt spike maximum at 30 volts.
Amplitude (peak to peak) range是指什么呢?超声波发生器,20KHz的,用于塑焊
peak是什么意思
peak是什么意思
peak是什么意思?
peak performance
PEAK indicator
More time to work,so more space to develop their career peak
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