The modal analysis of the wheel is done using the software ANSYS. Calculate the wheel mobility and the vibration velocity spectrum of the wheel and rail is calculated.
运用ANSYS对车轮进行了模态分析，求得车轮导纳以及钢轨和车轮振动速度的功率谱。
Compared to wire line networks, wireless networks have higher mobility, while they face the difficulty of bad wireless communication environment and limited spectrum resource.
相对有线网络，无线网络最大的优点是可移动性，但是却要面对恶劣无线通信环境和有限频谱资源的挑战。
However, the mobility effect, unreliable wireless channel condition and limited available wireless spectrum resources are the bottleneck for large traffic transmission.
然而，终端的移动性，无线链路的低可靠性以及无线带宽资源的有限性等条件限制使得无线接入成为大数据量传输的瓶颈。
However, the mobility effect, unreliable wireless channel condition and limited available wireless spectrum resources are the bottleneck for large traffic transmission.
然而，终端的移动性，无线链路的低可靠性以及无线带宽资源的有限性等条件限制使得无线接入成为大数据量传输的瓶颈。
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