By use of Visual C + + under Windows XP operating system a platform on virtual radio is designed in condition that 2 PCs replace DRM transmitter DRM channel and DRM receiver respectively .

在WindowsXP操作系统下使用 Visualc++工具成功设计了DRM系统的虚拟无线电仿真软件。用两台PC机仿真DRM 发射机，信道和DRM接收机。

Visual observation and automatic monitoring are analyzed through experiment and theoretical analysis and the principle and method that applies differential pressure transmitter to measure ratio of solid to liquid is expounded .

通过实验和理论分析了 目测和自动监测两种方法，阐述了一种用差压 变送器测量固液比的原理及方法。