A low-cost, installation convenient, continuously 　　accurate and multi-sensor based localization system 　　for a mobi......

This study focused on measurement condition experiment, diagnosis technology development and customized diagnosis method......

目的探讨超声测量左房后空间距离诊断胎儿完全性肺静脉异位引流（TAPVC）的临床价值。方法采用前瞻性研究和病例对照研究方法，选取2018......

利用两面顶压机和六面顶压机作为压力装置，分别对９３钨合金材料进行了高压超声测量。测得了９３钨合金材料在常态下的横、纵波声速及在０－３ＧＰａ压力......