带通采样定理在降低功耗问题中的实际应用奈奎斯特定律要求采样频率大于等于信号最
高频率的两倍, 对中心频率较高而频带较窄的信号使用奈奎斯特定律,
The practical application of the bandpass sampling theorem to reduce power consumption issues (2013-04-28, PDF, 220KB, 下载9次)
SMPP协议中文版.此协议描述短消息中心和扩展短消息实体（即手机银行业务模块）之间的协议数据传输格式。
The SMPP protocol Chinese version of this agreement the agreement described between the short message service center and extended Short Message Entity (ie mobile banking module) data transfer format. (2013-01-24, PDF, 36KB, 下载6次)
路线分析：即将跨越鸿沟
在90年代初，IT组织开始部署帧中继网络。这些网络的绝大多数，如自动柜员机网络，他们后面，是使用内置一个中心和轮辐设计。这种设计在很大程度上是因为它反映了感觉鉴于当时的一个组织内的信息流是自然从分支机构到总部的设施，然后再返回。
Route Analytics:Poised to Cross the Chasm
In the early 1990s, IT organizations began to deploy
frame relay networks. The vast majority of these
networks, like the ATM networks that followed them,
were built using a hub and spoke design. That
design made sense in large part because it reflected
the fact that at that time the natural information flow
within an organization was from a branch office to a
headquarters facility and back again. (2009-08-25, PDF, 56KB, 下载3次)