自相似性对信元丢失率、网络延迟等系统性能有重要影响，因此基于自相似模型的 研究显得日益重要。
Self-similar is very important to system performance such as Cell Loss Ratio (CLR), network delay, and so on, so study of self-similar models is increasingly significant nowadays.
OPNET是一套网络仿真工具，通过对现有协议、设备模型进行开发和改进，可以使其成为一个研究网络存储系统性能的高效平台。
OPNET is a set of network simulation tools, and can be an efficiency platform for researching network storage performance, by developing and improving the existing protocol and equipment model.
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