false alarm

英 [ˌfɔːls əˈlɑːm]

美 [ˌfɔːls əˈlɑːrm]

n.  假警报; 虚惊

计算机

牛津词典

noun

• 假警报；虚惊
  a warning about a danger that does not happen; a belief that sth bad is going to happen, when it is not
  1. The fire service was called out but it was a false alarm.
     消防人员接到报警后出动，但这是假报火警。

柯林斯词典

• N-COUNT 假警报;虚惊
  When you think something dangerous is about to happen, but then discover that you were mistaken, you can say that it was afalse alarm.
  1. ..a bomb threat that turned out to be a false alarm.
     最终证实是虚惊一场的爆炸恐吓

英英释义

noun

• a warning that is given about something that fails to occur

双语例句

• It is the core problem in laser detection system keeping low false alarm probability while ensure the detection distance.
  如何在保证激光探测距离的基础上保持低的探测虚警，一直是激光探测系统的核心问题。
• He was the victim of a false alarm.
  他受了一场虚惊。
• The model-based false alarm of BIT is studied. Firstly, the information uncertainty that induces false alarm of BIT is analyzed.
  针对基于模型的BIT中的虚警问题，首先分析了引发虚警的信息不确定性；
• The article expatiates the relation of alarm threshold, investigation level, probability of detecting and false alarm rate.
  阐述了核材料探查仪器的报警阈与调查水平、漏报率和误报率之间的关系。
• a bomb threat that turned out to be a false alarm.
  最终证实是虚惊一场的爆炸恐吓
• Simulation results show the mechanism can detect the DNS attack, it makes good compromise between the detection rate and the false alarm rate.
  仿真结果表明，该机制能够有效检测DNS缓存攻击，并实现检测准确率和误警率间的平衡。
• For reducing the false alarm, we adopt hierarchical alert classifier which combined misuse intrusion detection and anomaly intrusion detection.
  并且采取结合了不当行为与异常行为侦测的阶层式警报分类器来降低假警报。
• The rumours of a petrol shortage turned out to be a false alarm.
  汽油短缺的谣传原来是一场虚惊。
• The new family features five integrated technologies that yield high capture rates and low false alarm rates.
  新的系列有五个综合技术特征，仍然是高捕捉率和低误报率。
• A new constant false alarm rate ( CFAR) detector ( CMCAGO-CFAR) based on censored mean and cell averaging is presented in this paper.
  文中基于删除平均（CM）方法和单元平均（CA）方法，提出了一种新的恒虚警检测器（CMCAGO-CFAR）。