The design pattern, the realization frame and the information transfer mechanism are studied especially.
以上海市为例,研究和探讨了地理信息系统(GIS)在城市交通路况信息传播系统的应用方法,从系统的设计思想、实现框架和信息传送机制进行重点阐述。
This text relates some common concepts in digital communication: information transmission velocity R_b, code transmission velocity Rs, the bandwidth B, the cosine rolls coefficientα, bandwidth using efficiencyη, the error control encode efficiency Rc=k/n.
讲述了数字通信中的几个常用概念:信息传送速率Rb,码元传送速率Rs,带宽B,余弦滚降系数α,各种调制方式下的频带利用率η,差错控制编码效率Rc=k/n,并通过几个实例详细说明了它们之间的关系。
With many years development, the SMS with GSM technology has been perfect in many fields, such as remote monitor, data collection, GPS location, wireless alarm,charging announcement,etc.
经多年发展,GSM短信息传送技术已趋成熟和完善,它在远距离监控、数据采集、GPS定位、无线报警、缴费通知等领域都有着广泛的应用。