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

This has been a false alarm.
一切都是虚惊一场。
In order to guarantee the false alarm probability of CFAR detector, we determine practical threshold coefficients by using simulations.
本文中我们通过仿真的方法确定CFAR中的实际门限系数，研究有限的参考单元数对虚警性能的影响。
The sky went very dark and we thought it was going to rain but it was a false alarm.
天空变得黑沉沉的，我们以为要下雨了，但结果只是虚惊一场。
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。
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。
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）。
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。
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 experimental results show that the model has high detection rate, and which can deduce the false alarm rate effectively.
对模型和算法进行多种典型攻击测试实验，结果表明模型具有较高的检测率，并能有效降低误警率。
Then the paper makes a discussion on how to decrease the probability of false alarm and probability of false rejection.
论文从水印检测过程中可能发生的两类错误入手，讨论了降低检测虚警概率和漏报概率的一般方法。