天津农学院学报 ›› 2026, Vol. 33 ›› Issue (5): 74-79.doi: 10.19640/j.cnki.jtau.2026.05.011

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基于近红外光谱和紫外-可见光谱特征融合的沼液氨氮定量预测模型研究

聂家伟1, 柳星1, 吴羽璇2, 刘新媛1,通信作者   

  1. 1.天津农学院 工程技术学院,天津 300392;
    2.中机国际工程设计研究院有限责任公司,长沙 410000
  • 收稿日期:2025-06-24 发布日期:2026-11-02
  • 通讯作者: 刘新媛(1987—),女,讲师,博士,主要研究方向为生物处理技术。E-mail:liuxinyuan11@163.com。
  • 作者简介:聂家伟(2004—),男,本科在读,主要研究方向为光谱检测技术。E-mail:1479109575@qq.com。
  • 基金资助:
    天津市科技计划项目(25ZYCGSN00930); 天津市大学生创新创业训练计划项目(202610061281)

Construction of prediction model for ammonia nitrogen in biogas slurry based on fusion of near-infrared and ultraviolet-visible spectral feature

Nie Jiawei1, Liu Xing1, Wu Yuxuan2, Liu Xinyuan1,Corresponding Author   

  1. 1. College of Engineering and Technology, Tianjin Agricultural University, Tianjin 300392, China;
    2. China Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410000, China;
  • Received:2025-06-24 Published:2026-11-02

摘要: 为实现沼液中氨氮含量的高效、快速、无污染检测,构建了一种基于近红外(NIR)和紫外-可见(UV-Vis)光谱特征融合的沼液氨氮定量预测模型。采用偏最小二乘法(PLS)筛选最佳光谱数据预处理方法,利用竞争性自适应重加权算法(CARS)提取特征波长,并将特征波长融合后进行PLS建模。结果表明:基于NIR特征波长的模型预测性能(RPD=5.924 3)优于全光谱模型,而基于UV-Vis特征波长的预测模型性能(RPD=4.322 2)略低于全光谱;经NIR-UV-Vis特征波长融合后,预测模型的RPD值高达6.511 2,显著提升了沼液氨氮检测的准确性与可靠性。

关键词: 沼液, 氨氮, 近红外光谱, 紫外-可见光谱, 光谱融合

Abstract: In order to achieve efficient, rapid and pollution-free detection of ammonia nitrogen, this study constructed a quantitative prediction model for ammonia nitrogen in biogas slurry based on the fusion of near-infrared(NIR)and ultraviolet-visible(UV-Vis)spectral features. The partial least squares(PLS)regression method was used to screen the optimal spectral data preprocessing methods, and the competitive adaptive reweighted sampling algorithm(CARS)was employed to extract characteristic wavelengths. The characteristic wavelengths were fused for PLS modeling. The results showed that the prediction performance(RPD=5.924 3)of the NIR characteristic wavelength model was better than that of the full spectrum, while the prediction model performance(RPD=4.322 2)of the UV-Vis characteristic wavelength model was slightly lower than that of the full spectrum. Through the fusion of NIR-UV-Vis characteristic wavelengths, the RPD value of the prediction model reached 6.511 2, which greatly improved the accuracy and reliability of ammonia nitrogen detection in biogas slurry.

Key words: biogas slurry, ammonia nitrogen, near-infrared spectroscopy, ultraviolet-visible spectroscopy, spectral fusion

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