There are four key issues in the system, that is communication carriers, source coding, designation of virtual keyboard, and the single-trial estimation of its message carriers.
在这个系统中，通信载体、信源编码、虚拟键盘的设计和脑-机接口信号的单次提取是四个最核心的问题。
This paper introduces the designation and implementation of a concrete Community Service and Management System.
本文介绍了一个社区服务与管理系统的设计与实现。
On this design, after getting into view area, we should have explicit system and safety of the directions designation to indicate system.
在此设计上，进入景区后，我们应有明确的方位指示系统和安全指示系统。
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