利用socket 接收数据，通过各层数据包头字段信息过滤SNMP 报文并解析（还不够完善）。-Socket receive data, filter SNMP packets and parse through layers header field information (still not perfect).

针对基于粒子群优化算法的粒子滤波精度不高，容易陷入局部最优，难以满足目标跟踪的问题-For particle swarm optimization algorithm based on particle filter accuracy is not high, easy to fall into local optimum, it is difficult to meet the target tracking problem