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张立坚 《中国水能及电气化》2019,(10)
变压器作为水利水电工程中重要的电力设备,其运行质量关乎水利工程运行质量,完善变压器电气试验项目具有重要意义。文章从短路阻抗法测试变压器绕组变形应用实例入手,分析了测试原理,期望可以提升变压器运行质量。 相似文献
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A new method for reconstructing a 3-dimensional object from serial cross-sectionsis presented in this paper.The method is based on the principle of sampling and considersevery point in cross-sections as a sampling point and performs the interpolating of nonlinearfunction with these sampling points.Compared with other methods,this method has manyadvantages such as higher precision and fewer requested known sampling points.The result ofreconstruction with this method is an“entity”which involves the exterior shape and interiorconstruction information of the object simultaneously. 相似文献
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液相色谱-质谱法检测渔业养殖水中硝基呋喃及氯霉素药物 总被引:2,自引:0,他引:2
建立了同时测定渔业养殖水中呋喃唑酮、呋喃西林、呋喃妥因和呋喃它酮及氯霉素等5种抗生素药物的超高压液相色谱-电喷雾电离串联质谱(UPLC-ESI-MS/MS)分析方法。水样用HLB萃取柱净化、浓缩后,洗脱液经氮气吹干,残渣用V(乙腈)∶V(水)=1∶1混合溶液溶解,以乙腈和0.1%甲酸水溶液为流动相,经ZORBAX SB-C18色谱柱分离后,用串级质谱多反应监测模式做定性定量分析。该方法在0.5 μg/L或1~40 μg/L浓度范围内具有良好的线性, 相关系数均大于0.996,检出限(S/N=3)为0.5~1 μg/L, 平均回收率为90.3%~104.2%,相对标准偏差为5.4%~10.0%。 相似文献