首先介绍了J2EE框架和企业应用的多层结构模型；
This paper first introduces J2EE frame and n-tier model of enterprise application.
非贯通节理岩体多层结构模型假定岩桥为共面剪切破坏，模型适用于岩体节理共面并且岩桥长度远小于节理长度的情形。
This model assumes the coplanar shear failure mechanism of the rock bridge, so it can be used under the circumstance that the length of rock bridges is far less than of the length of the joint.
根据系统对性能的要求，结合分布式多层体系架构的理论设计出系统体系结构模型。
According to performance requirement of the system, structural model is given out with the theory of the distributional multilayered structure.
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