电子商务时代顾客忠诚度的提高策略研究 关键词：电子商务，顾客忠诚度， 动力系统模型 [gap=933]Keywords: E-commerce; Customer Loyalty Degree; Powerful System Model
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The security policy of security database management system provides the powerful security function to database. The model of BLP is one of common security policy model.
安全数据库管理系统的安全策略可以为数据库提供强大的安全功能，现在BLP模型是用得比较普遍的策略模型之一。
UML is a powerful tool for building system model and analyzing business process information.
UML是建立系统模型和分析业务处理流程的强有力的可视化建模工具。
This model can also be thought of as a powerful empirical formula of the human physiological optics for optoelectronic imaging system design and image evaluation .
这个模型也可做为一种有效的人眼生理光学经验公式，用于目视光电成象系统的设计和象质评价。
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