这种双通道比值指数和NDVI一样具有衰减仪器噪声和抵消常规大气影响的优点。
Like NDVI, This dual-channel ratio index has the advantages that could attenuate conventional equipment noise and atmospheric effects.
发现比值指数R（760，710） 与水稻叶面积指数呈极显著线性相关；而比值指数R（1650，1100） 与水稻地上部鲜质量和干质量均呈极显著幂函数相关关系。
After elongation leaf area index was linearly related to ratio index R(760,710), and aboveground fresh and dry weight showed significant relations with ratio index R(1650,1100) in rice.
体重指数是一个以身高与体重为基础计算出的比值，其正常范围通常在18和25之间，超过25为超重，超过30即为肥胖。
BMI is a calculation of height to weight, and the normal range is usually considered to be 18 to 25, with more than 25 considered overweight and above 30 obese.
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