在解决方案中，道通无线Mesh网络通过每个无线回程模块的背景扫描 （Background Scanning）来解决这个问题，系统采用layer 2方式完成上行链路选择和快速切换，仅需50-100ms即可完成，网络之间的切换对于最终用户是透明的。
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This instrument can clue on baseline shift to decide the frequency of background scanning, which can deduce NIR analysis error and improve NIR veracity.
该仪器具有基线漂移提示功能，从而确定仪器背景采集的频率，可以降低分析误差，提高检测结果的准确度。
Low power scanning electron microscope image of tooth surface, computer-coloured yellow on blue background.
牙齿表面的电子显微镜扫描图。
Background &Objectives:It was difficult to get a good tissued ose distribution using fixed field irradiation technique in large field. But the translating scanning beam irradiation can make it.
背景与目的：用固定野技术行特大野照射时，很难得到理想的组织剂量分布，而平移扫描式照射却能做到。
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