基于改进箱线图和ISMAHHO-KELM的变压器油中溶解气体体积分数预测
Gaoya dianqi油中溶解气体分析能够有效地揭示变压器内部的运行状况，在评估变压器运行状态和预测潜在故障方面具有重要作用。为此文中提出一种基于改进箱线图和ISMAHHO-KELM的变压器油中溶解气体体积分数预测方法。首先，为提高数据质量，利用基于中位偏差系数的改进箱线图对原始时间序列进行离群值检测和校正；然后采用变分模态分解对校正过的时间序列进行分解，得到多个子序列，以削弱时间序列的非平稳性；其次，通过核极限学习机模型预测子序列，同时提出改进黏菌—哈里斯鹰算法优化其超参数；最后，重构各子序列的预测值，得到最终预测结果 ...
付文龙 +3 more
doaj
[Determination of squalene and oxidized squalene in edible oil by gas chromatography-tandem mass spectrometry and evaluation of the thermal stability of squalene]. [PDF]
Se PuXiao GP, Liao DD, Li GS, Luo X, Yuan L.
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Gaoya dianqi对变压器油中溶解气体浓度进行预测分析可为其运行状态评估提供重要依据，从而有效掌握设备状态发展趋势，为预警和检修提供参考。鉴于现有算法难以实现长期精确预测，文中首次提出一种基于策略梯度（policy gradient，PG）算法优化的变压器油中溶解气体体积分数预测模型。首先以门控循环单元（gate recurrent unit，GRU）为基础，引入编码器—解码器结构搭建Sequence to Sequence（Seq2Seq）网络模型，并且结合注意力机制和Scheduled Sampling算法 ...
汤健 +5 more
doaj
[<i>Hugan</i> Decoction alleviates non-alcoholic fatty liver disease in rats by activating the AMPK/m-TOR signaling pathway and reducing lipid synthesis]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoShang D, Li W, Cui L, Chen M.
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[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]
Se PuLi YJ.
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[Simultaneous determination of vitamins K<sub>1</sub> and K<sub>2</sub> in cosmetics by QuEChERS-high performance liquid chromatography and verification by high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuSun Q, Chen CX.
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Gaoya dianqi并联电抗器（以下简称电抗器）是在高压长距离输电工程中无功补偿的关键设备，电抗器故障对电网的安全稳定运行构成威胁。文中研究了浙江某特高压变电站1 000 kV线路的电抗器故障现象，通过在线油中溶解气体分析发现电抗器发生电弧放电故障，然后通过局部放电在线监测和超声波局放检测等方法再次确认故障并定位到放电位置在电抗器A、X两柱，最后通过解体检查确认故障在电抗铁心柱表面地屏出出现放电。为了进一步追溯绝缘击穿的原因，文中对油中溶解气体突变、局部放电最大放电量与电网事件进行了相关性分析 ...
陈泓材, 张洋, 陈珉
doaj
[Tracing the origin of crude oil based on fingerprint profiles obtained by comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry]. [PDF]
Se PuZhang WY +7 more
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[Determination of 29 organic acids in tobacco based on isopropyl esterification derivatization by gas chromatography-mass spectrometry]. [PDF]
Se PuYu J, Gao Y, Wu D, Cao YQ, Qi DW.
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[Molecular Mechanisms of Intervention With Lishukang Capsule in a Rat Model of High-Altitude Pulmonary Edema]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanZhang D +5 more
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