Guangtongxin yanjiu, 1982 将彩色电视信号分离后,进行DPCM编码,其合成速率应是行频的倍数为34Mb/s1,为了能以三次群速率进行传输,要将34Mb/s信息流通过正码速调整提高到34368kb/s。候时抖动是码速调整的固有抖动,为了减小候时抖动並兼顾其它性能,本文设计了码速调整的帧结构,並对候时抖动进行了频谱分析。
郑庆镒
doaj
Zhongguo shiyan zhenduanxue, 2005 目的对两种血清苯丙氨酸高效液相色谱测定法进行比较。方法对高效液相色谱-紫外检测法（HPLC-UV）和高效液相色谱-荧光检测法（HPLC-FLD）,从线性范围,检测限,精密度等参数上进行比较,用两种方法分别测定了正常儿童和一组PKU患儿血清phe值,对结果进行统计分析。结果HPLC-UV法和HPLC-FLD法的线性范围分别为61512μmol/L和121220μmol/L,最低检测限分别为0.75μmol/L和3μmol/L,平均回收率分别为98.6%和102.5 ...
唐爱国, 洪敏, 莫喜明, 陈若虹
doaj
Gaoya dianqi, 2007 为了查找110 kV堡子店2号主变压器投运后色谱异常的原因,采用色谱跟踪结合电气试验数据进行综合分析,证实铁心片间短路是该故障的诱因,并对短路缺陷进行了处理,提出在变压器安装吊芯检查时,应将铁心连片解开,测量铁心级间绝缘电阻,防止铁心片间短路导致运行故障。
王刚, 沈巍, 马涛
doaj
[Determination of caffeine and taurine in electronic cigarette oil by high performance liquid chromatography- tandem mass spectrometry]. [PDF]
Se PuSun X +4 more
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[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]
Se PuLi YJ.
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[Determination of 35 pyrrolizidine alkaloids in dried tea by ultra-high performance liquid chromatography- triple quadrupole mass spectrometry]. [PDF]
Se PuDong L +6 more
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[Determination of tetracyclines in animal muscle tissues by ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]
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[Research progress on the pretreatment and analysis of prohibited components of glucocorticoids in cosmetics]. [PDF]
Se PuLiu L, Xiao XH, Fang JH, Li GK.
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[Determination of five photoinitiators including 2，4，6-trimethylbenzoyl diphenyl phosphine oxide in gel nail polish by high performance liquid chromatography]. [PDF]
Se PuGong X, Sun J, Li XX, Feng YL.
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[Simultaneous determination of vitamins K<sub>1</sub> and K<sub>2</sub> in cosmetics by QuEChERS-high performance liquid chromatography and verification by high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuSun Q, Chen CX.
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