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中文摘要：
根据互联网数据传输特点，建立一个开放边界条件下数据传输元胞自动机模型，研究输入概率、输出概率和最大输入速率对路由节点队列长度、发送速率和数据包逗留时间的影响。计算机模拟结果表明，输入概率和输出概率均只在一定范围内影响系统平均发送速率的变化，系统存在自由相和拥塞相。根据数值模拟结果作出系统相图，并对相图进行分析，为实际数据传输管理提供参考。
英文摘要：
Based on the characteristic of internet date transmission,a cellular automaton model of the date transmission with open boundary condition is proposed. The model is used to study the mean queue length,sending rate and sojourn time versus the input probability a,the output probability β and the maximum input rate Jin in the routing node. Simulation results show that a and fl can change the mean sending rate in a certain range. There are free phase and jam phase in the system. The phase diagram of system is obtained and analyzed. These studies provide the reference for the management of the realistic data transmission.
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