The localization principle of bistatic sonar is given and the GDOP(Geometry Dilution Of Precision) which used in bistatic radar for describing the localization error has been cited in bistatic sonar.
在对双基地声呐定位原理和定位误差分析的基础上，提出了用定位精度的几何解释（GDOP）来表征双基地声呐定位误差的方法。
The result shows that measurement standard error reaches minimum 0.027 for most milk sample and satisfies the national criterion of protein detection when dilution ratio ranges from 6.2 to 7.4.
结果表明，对于大多数的牛乳样品，当其稀释倍率在6.2至7.4范围内时，测量标准偏差达到最小值0.027，满足蛋白质检测国家标准。
The method for determine sewage's chroma is method of dilution multiple. It's easy to bring in error when using eyes to determine the diluted sample is whether achromatism or not.
污水色度的测定一般采用稀释倍数法，该方法在用人眼判定稀释后的水样是否接近无色时容易引起误差。
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