其它实时系统则利用一些算法来检测可疑的行为，比如一群人在一条被封住入口的门边徘徊，抑或定位那些看起来被人落下无人看管的行李物品。
Other real-time systems use algorithms to detect suspicious behaviour, such as a group loitering near a door where entry is barred, or to spot items of luggage that seem to have been left unattended.
方法对75例可疑前置胎盘者分别用传统腹部扫查和应用腔内探头扫查定位诊断，并与产时临床诊断比较。
Methods 75 cases who were suspicious be suffered from placenta previa were detected with classical ultrasound and intralumen ultrasound. The results were compared with delivery cases.
方法对25例有明确异物吞入史，但X线探查为阴性的患者，运用超声高、低频探头对可疑部位进行探查定位。
Methods 25 patients who had foreign body inside the digestive tract but the X-ray exploration was negative, were exarnined with ultrasonic inspection with high and Iow frequency detecting head.
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