26．准确度等级（accuracy classes） 符合有关的计量要求并使其误差保持在规定极限内的计量器具的 等别或级别,它也是计量器具的最具概括性的特征,综合反映着计量 ...
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Measures humidity, temperature, and barometric pressure in two accuracy classes. The PTU300 series features a large numerical and graphical display. Optional data logging and (w) LAN interface.
该产品可以测量温度、湿度和大气压力，并有两个精度等级可选，此外，PTU300系列带有大屏幕数字显示器。还有可供选择的数据采集和(W) LAN界面。
Compared with the classification method purely based on spectral character, this method can improve the classification accuracy and refine object classes in some extent.
与单纯基于光谱特征的分类方法进行比较，该方法在一定程度上改善了分类精度，细化了地物类别。
When the data dimensionality is reduced 90% by using the proposed method, the overall classification accuracy of nine classes of ground cover reaches 80.2%.
利用该方法进行处理，当高光谱数据维数降低了90%时，9类地物分类实验的总体分类精度可以达到80.2%。
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