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In this pater, the primary constituents in volatile oils of Saposhinikavia divarica(S.D.) collected in different harvest times were analyzed and identyfyed. Water vapor distillation was used to extract the volatile of S.D. and GC-MS was used to analyze and identify the chemical compinents of the volatile oils. As a result, the type of chemical constitents and their contents in the sample volatile...
A HPLC method for the determination of the content of Isoniazid and Isonicotinic acid in Isoniazid Tablets was established. The determination was performed on SHIM-PACK VP-ODS C18 column. The mobile phase consisted of (40:60) methanol-water (0.2%Docusate Sodium) at a flow rate of 0.8ml·min−1. The UV detection wavelength was set at 261nm and the sample size was 5μL. The linear range of isoniazid and...
This paper describes the peak load characteristics of power systems. A new method for the peak load forecasting (PLF) is proposed by means of an integration technique, which combines fuzzy clustering with feed-forward neural network (FNN) of the Levenberg-Maruardt (LM) training algorithm. Compared with the traditional back propagation (BP) algorithm, the proposed method proves more efficient to the...
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