Goldsmith said that most second-generation, or 2G, cell phones use a combination of time division and frequency division.

戈德史密斯说，大多数第二代手机或2G手机采用时间划分和频率划分相结合的方式。

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Through the experiment, it was validated that the first frequency that have great effect on the field distribution is TE101, and the resonant frequency of TE101 is the limited frequency of TEM cell.

通过实验分析，证实了对场分布影响较大的第一阶谐振频率是TE101模，TE101模的谐振频率是TEM传输室的上限使用频率。

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Methods A simple, rapid and sensitive poly-nuclear cell assay was used to investigate the frequency of HPRT locus mutation.

方法采用多核细胞法研究肿瘤患者外周血淋巴细胞HPRT基因位点的突变频率，并与正常人群进行对比。

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The Federal Communications Commission limits cell phone radio frequency energy emissions, called the specific absorption rate (SAR), at 1.6 watts per kilogram, as measured over one gram of tissue.

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By changing the composition of the dye, G24's engineers ensure that the maximum sensitivity of the cell coincides with whatever frequency mix is appropriate for the artificial light concerned.

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Using millimeter wave technology, which the TSA says emits 10, 000 times less radio frequency than a cell phone, the machine scans a traveler and a robotic image is generated that allows security personnel to detect potential threats -- and, some fear, more -- beneath a person's clothes.

CNN: Airport security bares all, or does it?