Based on the application and study situation, problems of synthesis process of acetylacetone and its development were studied.
针对乙酰丙酮的应用前景和研究现状，研究了目前乙酰丙酮合成工艺中存在的问题和发展趋势。
Based on the study, the modeling of geared rotor system and the application of modal synthesis method for rotor system were discussed.
基于转子系统的有限元法的研究，从理论上分析了齿轮传动转子系统的模态综合法的建模和求解的具体步骤。
A study is made of the synthesis of urea phosphate and its application on cotton by drip irrigation.
研究了磷酸脲的合成及其在滴灌棉花的施用情况。
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