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minimum detectable echo level 最小可检测回声级
The minimum detectable concentrations (MDC) of Pb and Cd were 4mg/L and 0. 3mg/L respectively in 5 .0ml sample. 取样品5.;0ml，最低检出浓度铅、镉分别为4mg/L，0
The minimum detectable concentrations are less than 0.1 ppm for H2, O2 and CH4, and 0.5 ppm for CO. 氢、氧、甲烷的最小检知浓度为0.;1ppm;一氧化碳的最小检知浓度为0
In this paper,the minimum detectable velocity(MDV) of moving target indication(MTI) radar is researched. 研究了动目标显示(MTI)雷达的最小可检测速度(MDV)。
The method is simple, fast and of high precision and accuracy.The minimum detectable concentration is 1.5mg/kg. 该法简便快速;最低检测浓度为1.;5毫克/公斤;具有良好的精密度和准确度。
Abstract: In this paper, the minimum detectable velocity（MDV） of moving target indication（MTI） radar is researched. 文章摘要: 研究了动目标显示（MTI）雷达的最小可检测速度（MDV）。
IBS and DTI can detect echo and function changes of chronic ischemic myocardium, and provide information for clinical investigation and treatment of CHD. 超声IBS和DTI技术从回声和心室壁运动等不同方面检测慢性心肌?
For 51Cr, 60Co, 65Zn, 95Zr-95Nb and 137Cs the decontamination factor is greater than 103. The minimum detectable limit of this method is 3. 8X 10-3 Bq/L. 对铬-51、钴-60、锌-65、锆-95-铌-95和铯-137等核素的去污系数均大于10~3。方法简便;易于操作;探测限为3.;8×10~(-3)BqL~(-1)。
The application of de noising by soft thresholding on wavelet transform to ultrasonic detection echo is discussed. 研究小波变换软阈值去噪方法在超声检测回波处理中的应用。
The scheme can achieve 195V/pF sensitivity and IfF minimum detectable capacitance variance, which can satisfy the capacitive micromachined inertial sensors with ordinary precision. 采用一组标定电容作为传感器的模型进行了实验,实验电路灵敏度可以达到195V/pF,最小分辨率为1fF。采用该方案能够满足对普通精度的电容式微机械惯性传感器信号的检测。
This study adopts the Monte-Carlo general software-MCNP to compute and analyze the effect of movement of the nuclear matter on the minimum detectable limit of the nuclear radiation detector array. 文章通过建立蒙特卡罗模型并应用通用软件MCNP程序分析计算核材料的移动对核辐射探测器阵列探测下限的影响。
Detecting the density of pollutant gas is one of the important applications of lidar.The minimum detectable concentration is a key index of lidar. 探测大气中污染气体的浓度是激光雷达的一个重要应用方面,最小可探测浓度是衡量一个雷达系统的重要指标。
The Molde YB-GT-3 Automatic Can Vacuum Sorter based thereon, with a probe detecting echo waves cyclically proves to be of high sentivity and reliability, competent to check and sort the majority of various cans for low vacuums. 应用这个方法制成的YB-GT-3型罐头真空度自动分选机适合国情,灵敏可靠,能对大部分品种的罐头进行低真空度的自动分选。
From the qualitative point of view, the nuclear material are more difficult to detect when moving than static (namely, the minimum detectable limit is lower when static than moving). 从定性的角度看，核材料移动比静止时更难以探测（即静止比移动时的探测下限低）。
This paper introduces the detecting echo methods for multi-beam sonar.It describes the disadvantage of BDI and WMT detecting methods.So Maximal Amplitude Deter-mining Echo method is presented. 摘要详细论述了多波束测深系统的幅度检测方法，指出了传统的BDI和WMT检测方法的缺点，提出了回波最大强度优先法。
This thesis provides a new method to measure the opening loading of fatigue crack That using ultrasonic testing detects echo of crack tip is similar result to general method for use strain gage. 本文也提供了另一量测开口荷重的方法，利用超音波检测技术，将它应用于疲劳裂缝开口荷重的量测，从量测的结果可发现荷重与裂缝尖端的回波变化与一般量测开口荷重的方法有相似的结果。
Minimum Detective Height and Height Measurement Accuracy Use Diffraction Wave Method to Detect a Crack Height. 衍射波法测定裂纹高度时的最小可测高度和高度测试精度。
The minimum detection limit of this method is 1.5 Bq/L, The precision is 10% , The recovery ratio is 97% - 100% . 方法的检测限为1.;5Bq/L;精密度为10%25;放化回收率为97%25-100%25。
The minimum detectable limit of the nuclear radiation detector array is an important technic criteria to judge whether the detector satisfies the detecting requirements or not. 摘要核辐射探测器阵列的探测下限是判断其是否符合探测要求的重要技术指标。