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false-alarm-rate
相关语句
  虚警率
     How to maintain the false-alarm-rate constant of radar detectingsystem is one of the important problems in modern radar technology andsignal processing technology.
     如何维持雷达检测系统恒定的虚警率是现代雷达技术和信号处理技术中重要的问题之一。
短句来源
     This paper uses the Monte-Carlo method to analyse the performances of various CFAR detectors on radar,specially on a fire- finder radar,and the false-alarm-rate to various pa-rameters adjustment are given out.
     用蒙特卡罗方法,结合某炮位侦察雷达的恒虚警检测器,对雷达的恒虚警检测性能进行了定量分析,给出了线性接收机和对数接收机在不同恒虚警处理时的门限因子及相应的虚警概率,并分析了对数起点变化时虚警率的影响。
短句来源
  误检率
     The results show that, with fewer constrains, the algorithm based on skin color and independent component analysis has a high hit-rate and low false-alarm-rate in face detection on the condition of different lightness conditions, sizes of face, facial expressions, variable orientations, partial occlusion, and complicated background.
     实验结果表明,基于肤色和独立分量分析的人脸检测算法在少量条件的约束下,对亮度变换、不同尺寸大小、表情姿态、轻度侧面旋转、部分遮挡、复杂背景等情况有较高的检测率和较低的误检率
短句来源
     In the third phase, the face-color detection in a combinatorial color space of the rgb and YIQ effectively decreases the false-alarm-rate of the system.
     肤色检测阶段以彩色和亮度分离的YIQ模型弥补rgb模型的不足,有效地降低了类haar特征分类器的误检率
短句来源
     The experiment results show that the system is quite successful and achieves a high hit-rate , low false-alarm-rate and high recognition speed.
     实验结果表明,本系统在正确率、误检率、识别速度等方面均获得了较理想的结果。
短句来源
     The false-alarm-rate of the proposed system is far lower than that of the haar-like feature based one.
     误检率比起单纯的用类haar特征检测降低很多。
短句来源
     The experiment results show that the extension to Viola's technology is quite successful. The face detection system achieves a high hit-rate and low false-alarm-rate, especially, the detecting speed of the system is very high and almost attain the criterion of real-time.
     实验结果表明这一尝试是成功的,取得了较高的检测率和较低的误检率,特别是检测速度很快基本达到了实时检测的标准。
短句来源
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  “false-alarm-rate”译为未确定词的双语例句
     Research on False-Alarm-Rate Decreasing at Sensor-Level of Built-in Test Systems in Mechatronic Products
     机电产品BIT系统传感层降虚警的理论与技术研究
短句来源
     It uses a conventional constant false-alarm-rate(CFAR) detection procedure but the thresholding scheme is based on regression analysis of power spectrum values along range and Doppler cells.
     该方法采用传统的恒虚警率(CFAR)检测方法,但其门限设置是基于沿距离和多普勒单元功率谱值的回归分析。
短句来源
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  false-alarm-rate
The nonparametric detectors are CFAR (Constant-False-Alarm-Rate) detectors, when the input received reference cells are IID (Identical Independent Distribution) variances.
      


This paper deals with the using of six stages differential pair transisto-f amplifier circuits with low-and-high gain in radar receivers at intermediate frequency(30MC) systems. Because it us.es pair direction cus-off limiting rather than of saturation limiting. To integrate number of minority carriers in transistor base has been avoided. So that response velocity of Receiver intermediate frequemcy systems are very rapid. Small signals after Radar target strength ocho have forcible display. If we accurately...

This paper deals with the using of six stages differential pair transisto-f amplifier circuits with low-and-high gain in radar receivers at intermediate frequency(30MC) systems. Because it us.es pair direction cus-off limiting rather than of saturation limiting. To integrate number of minority carriers in transistor base has been avoided. So that response velocity of Receiver intermediate frequemcy systems are very rapid. Small signals after Radar target strength ocho have forcible display. If we accurately select transistors and circuit parameters. Small signals have high gain, but great signals have low gain. Output signals amplitudes-input signal amplitudes have logarithmic relation. Input signal dynamic range have over 80db. If logarithmic begining point puts below 10db receiver noise level. It still has constant false-alarm rate characteristics.

本文阐述了在雷达接收机中频(30兆赫)系统中采用六级双增益级差分对晶体管放大电路时,由于它本身是采用双向截止限幅而不是饱和限幅,故避免了晶体管基区积累大量少数载流子现象。这样使接收机中频(30兆赫)系统响应速度很快,对雷达目标强回波后面的弱信号有较强的显示能力,如果管子及线路参数选得正确时,则可做到:小信号具有高增益,大信号具有低增益,输出信号与输入信号幅度成对数关系,输入动态范围可达80分贝以上。如果对数起点选在接收机噪声电平以下10分贝时,它还具有恒虚警特性。

This paper gives the false-alarm rate PFA for rank quantizer when input range samples are not independent[1]. But PFA is written in a multiple integral form, the multiplicity being equal to the number of samples. So it is difficult to calculate the PFA when the sample number is greater than 8. In this paper, a first-order Markov sequence of Rice model for narrow band noise is given, which we obtained from a DJS-6 computer, and MonteCarlo simulation method is used to determinate the detection performance lor...

This paper gives the false-alarm rate PFA for rank quantizer when input range samples are not independent[1]. But PFA is written in a multiple integral form, the multiplicity being equal to the number of samples. So it is difficult to calculate the PFA when the sample number is greater than 8. In this paper, a first-order Markov sequence of Rice model for narrow band noise is given, which we obtained from a DJS-6 computer, and MonteCarlo simulation method is used to determinate the detection performance lor rank detector in correlation Gaussian noise. So the sample number is not limited and it is possible to determine the probability of detection PD for constant target signals.

文献[1]给出了在距离采样为非独立时秩值量化器的P_(FA),但因P_(FA)表示为一个多重积分,其积分重数等于采样数,当采样数大于8时计算P_(FA)就很困难。本文所介绍的方法并不受采样数的限制,而且还可以得到非起伏目标的发现概率P_D。文中用DJS-6计算机产生一组窄带的Rice型一阶Markov随机数列,并用MonteCarlo模拟方法得出相关Gauss噪声中秩值检测器的特性。

The modified generalized sign detector (MGSD) and the two-pole filter detector (TPFD) are simulated by the use of Monte Carlo method,to obtain the curves of their false-alarm probubility,detection probability and angular accuracy in Weibull noise.Ely comparison MGSD has an advantage over TPFD in that the former pcovides a constant false-alarm rate when the samples of the reference cells are independent and identical-ly distributed,besides,its defection prodability and angular accuracy in Weibull noise are higher...

The modified generalized sign detector (MGSD) and the two-pole filter detector (TPFD) are simulated by the use of Monte Carlo method,to obtain the curves of their false-alarm probubility,detection probability and angular accuracy in Weibull noise.Ely comparison MGSD has an advantage over TPFD in that the former pcovides a constant false-alarm rate when the samples of the reference cells are independent and identical-ly distributed,besides,its defection prodability and angular accuracy in Weibull noise are higher when the signal-noise ratio is smaller,with a reduction in the effect of extraneous targer.These advantages of MGSD are more obvious if the shape parameter of Weibull distribution is smaller.

采用Monte Carlo法模拟了修正型广义符号检测器(MGSD)和双极点滤波器检测器(TPFD),给出了它们在Weibull噪声中的虚警概率检测概率和测角精度曲线。与TPFD相比较,MGSD不仅当参考单元的样本为独立同分布时能提供恒虚警检测,而且在Weibull噪声中低信噪比时的检测概率和测角精度较高,额外目标的影响也减弱了。Weibull分布的形状参数越小,MGSD的这些优点越明显。

 
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