典型煤的近红外反射光谱特征的方向性研究
杨恩
1
, 王世博
2,
*
Study on Directional Near-Infrared Reflectance Spectra of Typical Types of Coal
YANG En
1
, WANG Shi-bo
2,
*
褐煤二号特征波长( λ )反射率极坐标云图 (a): λ =1 400 nm; (b): λ =1 700 nm; (c): λ =1 900 nm; (d): λ =2 200 nm; (e): λ =2 300 nm