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基于拉曼光谱和改进极限学习机的葡萄糖浓度检测 被引量:2
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作者 邢凌宇 王巧云 +1 位作者 杨磊 尹翔宇 《光散射学报》 2020年第2期159-165,共7页
拉曼光谱技术由于其快速、简单且无损等优势,广泛地应用于组分的定量分析。目前常用的定量回归方法包括偏最小二乘、人工神经网络、支持向量机等,为寻求新方法,本文对41组葡萄糖样本的拉曼光谱数据研究,以极限学习机为定量回归基础,结... 拉曼光谱技术由于其快速、简单且无损等优势,广泛地应用于组分的定量分析。目前常用的定量回归方法包括偏最小二乘、人工神经网络、支持向量机等,为寻求新方法,本文对41组葡萄糖样本的拉曼光谱数据研究,以极限学习机为定量回归基础,结合遗传算法、粒子群算法、人工蜂群算法等优化算法,比较分析后提出一种新型自适应差分进化的人工蜂群算法应用于极限学习机,该模型对差分进化的变异率和交叉率做了调整,能够降低极限学习机容易陷入局部最优和差分进化对参数依赖性大的问题,优化后模型的评价指标较传统极限学习机和基于其它优化算法都有显著提升。实验表明,基于自适应差分进化人工蜂群算法的极限学习机提高了预测精确度和模型稳健性。 展开更多
关键词 人工蜂群算法 自适应差分进化 拉曼光谱 葡萄糖样本 极限学习机
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Effect of Ferulic Sesquiterpene Compounds on Enzyme Activity of Schistosomulum
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作者 Cao Zimeng Zhao Hongmei +2 位作者 Liao Qianhui Wang Jing xing lingyu 《Animal Husbandry and Feed Science》 CAS 2018年第2期131-132,共2页
[Objective] The paper was clear the effects of ferulic sesquiterpene compounds on enzyme activity of schistosomulum.[Method]Mice infected with schistosome cercariae were orally administrated with ferulic sesquiterpene... [Objective] The paper was clear the effects of ferulic sesquiterpene compounds on enzyme activity of schistosomulum.[Method]Mice infected with schistosome cercariae were orally administrated with ferulic sesquiterpene compounds at the dose of 300 mg/kg on the 6 thday post infection once a week for 4 weeks.Schistosomula were collected and ground into homogenate on the 3 rdand 5 thday after every time of administration.Thin layer starch gel electrophoresis was used to observe the activity of enzymes in the homogenate.Control group was also designed(drug free mice).[Result] The activities of malic dehydrogenase,6-phophate mannosease and acid phosphatase were obviously inhibited in the drug group,but the activity of phosphoglucoisomerase was not inhibited.[Conclusion] Ferulic sesquiterpene compounds have inhibitory effect on energy metabolism of schistosomulum and digestion of red blood cells. 展开更多
关键词 Ferulic sesquiterpene compounds Schistosomulum ISOENZYME
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