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The climate impact of wild pigs greater than a million cars, study finds
climate pig carbon emission ecosystem
2021/8/3
By uprooting carbon trapped in soil, wild pigs are releasing around 4.9 million metric tonnes of carbon dioxide annually across the globe, the equivalent of 1.1 million cars, according to new research...
同步荧光光谱结合CARS变量优选预测猪肉中四环素残留含量
同步荧光光谱 CARS变量优选方法 支持向量回归 四环素 猪肉
2014/3/6
为实现快速检测猪肉中四环素残留含量,采用同步荧光法结合竞争适应重加权采样 (CARS)变量优选建立了猪肉中四环素残留含量的支持向量回归(SVR) 预测模型。从样本的三维同步荧光光谱中确定了最佳波长差为65nm,采用CARS方法从中挑选出与四环素相关的特征波长变量,并与连续投影算法(SPA)及遗传算法(GA)比较。最后,对优选出的16个波长变量应用SVR算法建立猪肉中四环素含量的预测模型。经过分析发...