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Analysis and Evaluation of Nutrient Composition in the Wild, Pond- and Lake-Cultured Topmouth Culter (Culter alburnus)
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作者 Zhigang He Hao Wu +5 位作者 Jinglong Li Xiaofei Cheng Xing Tian Shiming Deng xunhua liu Dongwu Wang 《Agricultural Sciences》 2023年第12期1675-1687,共13页
Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that dif... Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that differ in their proximate composition, amino acids, fatty acids, and minerals. Wild fish had a significantly lower crude lipid contents than cultured fish (P P ∑PUFAs) showed an obviously opposite trend. As compared with cultured fish, wild fish had significantly higher levels of n-3 PUFAs, arachidonic acid (AA), eicosapentaenoic acid (EPA) and docosahxaenoic acid (DHA) (P P > 0.05), except for Na, Fe and Se. In conclusion, diet composition and external aqueous environment may determine the differences between wild and cultured topmouth culter. 展开更多
关键词 Topmouth Culter (Culter alburnus) Cultured and Wild Fish Amino Acids Fatty Acids Mineral Composition
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改进ACUSUM算法的自适应重合闸判据 被引量:5
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作者 罗薇 黄纯 +3 位作者 罗勋华 潘志敏 刘琨 梁勇超 《电力系统及其自动化学报》 CSCD 北大核心 2017年第9期136-142,共7页
本文提出基于自适应累加和算法的自适应重合闸方法,实现了故障性质的判别及二次电弧熄弧时刻的检测。首先,研究了不同故障性质下线路故障相端电压幅值的变化规律,阐述了利用电压幅值的上升及下降时序识别故障性质和捕捉故障熄弧时刻的... 本文提出基于自适应累加和算法的自适应重合闸方法,实现了故障性质的判别及二次电弧熄弧时刻的检测。首先,研究了不同故障性质下线路故障相端电压幅值的变化规律,阐述了利用电压幅值的上升及下降时序识别故障性质和捕捉故障熄弧时刻的基本原理;其次,对自适应累加和算法进行改进,克服了其运算量大、触发信号持续时间短的不足;最后,给出了自适应重合闸的实现方案。仿真验证了所提方案的可行性和有效性。本文方法实现简单,抗干扰能力强,对不带并联电抗器和带并联电抗器的输电线路均适用。 展开更多
关键词 自适应重合闸 自适应累加和算法 瞬时性故障 永久性故障 二次电弧
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