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分析了工业生产中影响VC结晶控制过程的主要因素,结合结晶理论,在实际生产中进行了全方位的研究,分析了实际生产操作中的各项关键因素,找出了最终成品粒度最佳的结晶控制方法,建立了完善的结晶控制操作,根据客户需求差异进行分类,合理规划产品并设计了专门的类型,并以此分析了当前VC市场环境,阐述了对市场及用户需求.“,”The main factors affecting the crystallization in vitamin C(VC)industrial production were analyzed. Combining with the crystallization theory,actual production operation was researched,every key factor was analyzed.The optimal crystallization control method forming the suitable final product size was found out. A perfect crystallization control operation was established,the reasonably plan and product family were developed,an expansion analysis model of customer requirements was proposed based on ontology description to mine and predict customer requirements. The current market environment of VC was analyzed,the demand of the market and the users were described.