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炉水R值检测的误差分析
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作者 孙墨杰 靳世久 +1 位作者 李一博 王立坤 《天津大学学报(自然科学与工程技术版)》 EI CAS CSCD 北大核心 2003年第4期486-488,共3页
由化学酸碱平衡理论及质子条件建立了pH值、磷酸盐浓度与R值算法的数学模型,通过LabView编程,计算分析了协调磷酸盐处理的测量误差对R值测量的影响,并根据计算结果优化出协调磷酸盐处理过程中pH值、磷酸盐控制的最佳范围,对我国广泛应... 由化学酸碱平衡理论及质子条件建立了pH值、磷酸盐浓度与R值算法的数学模型,通过LabView编程,计算分析了协调磷酸盐处理的测量误差对R值测量的影响,并根据计算结果优化出协调磷酸盐处理过程中pH值、磷酸盐控制的最佳范围,对我国广泛应用的协调磷酸盐处理有一定的指导作用. 展开更多
关键词 炉水 r值检测 误差分析 钠磷摩尔比 水质调节 汽包锅炉 化学酸碱平衡理论 磷酸盐 PH
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Application of Holter ECG Signal Analysis Based on Wavelet and Data Mining Technique
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作者 余辉 谢远国 +1 位作者 周仲兴 吕扬生 《Transactions of Tianjin University》 EI CAS 2004年第2期126-129,共4页
A new model based on dyadic differential wavelet was developed for detecting the R peak in Holter ECG signal according to the design of data mining. The Mallat recursive filter algorithm was introduced to calculate wa... A new model based on dyadic differential wavelet was developed for detecting the R peak in Holter ECG signal according to the design of data mining. The Mallat recursive filter algorithm was introduced to calculate wavelet and optimize the detection algorithm which is based on the equivalent filter technique. The detection algorithm has been verified by MIT arrhythmia database with a high efficiency of 99%. After optimization, the algorithm was put into clinical experiment and tested in the Air Force Hospital in Tianjin for about two months. After about 108 hearts beating test of more than 100 patients, the total efficient detection rate has reached 97%. Now this algorithm module has been applied in business software and shows perfect performance under the complex conditions such as the inversion of heart beating, the falling off of the electrodes, the excursion of base line and so on. 展开更多
关键词 WAVELET data mining signal detection ELECTrOCArDIOGrAM dyadic wavelet r peak detection
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