您要查找的是不是：
- pulse echo return loss 脉冲回波衰耗
- Experimental results show that,compared with traditional double-talk detection methods,the new algorithm has comparable computation complexity and works more stably,thus improving the echo return loss enhancement(ERLE) during the double-talk. 实验结果表明,该算法与传统算法相比,运算量相当; 但在双端发声期间,该算法稳定性更高,回音往返损耗增强(E cho return loss en-hancem en t,ERLE)有明显的改善。
- " ACOM is the combined loss achieved by the echo canceller, which is the sum of the echo return loss, echo return loss enhancement, and nonlinear processing loss for the call. ACOM是回声消除器完成的综合损耗，是呼叫的回声返回损耗、回声损耗增强以及非线性处理损耗的总合。
- echo return loss 回波损耗
- echo return loss enhancement 增强回波损耗
- Pulse Echo Method (PEM) is a fast,economic and feasible method for Low-strain Dynamic Testing(LDT)of piles. 小应变反射波法是当前在工程桩基检测中应用的动测法之一。
- Physical characteristics of terrestrial surface targets are retrieved by information contained in laser pulse echo signal with laser altimeter. 摘要激光测高仪依靠回波信号包含的信息来反演地面目标的物理特性，因此必须保持回波信号的保真度和高信噪比。
- Dynamic sonic vibration,pulse echo method,backscatter method,dual transducer methods and ultrasonic spectroscopy analysis were often used for ultrasonic testing. 超声检测方法主要有声振法、脉冲回波法、背散射法、双探头法和超声谱分析法。
- In the process of ultrasonic testing of multi-layered interface, it is difficult to distinguish interface-echo from ultrasonic pulse echo because of peculiar structure. 摘要超声检测在多界面粘接检测应用中，由于多界面结构的特殊性，造成回波信号不易分辨。
- This system adopts ultrasonic pulse echo to measure distance,uses temperature sensor DS1624 to obtain ambient temperature which is used to compensate the measurement errors by soft programming. 该系统采用超声波脉冲回波测量方法测量摊铺料厚度,利用温度传感器DS1624测量环境温度,通过软件对温度引起的测量误差进行补偿;
- Using the characteristics of pulse echo singal during the probe adjustment, a relation model between angle of incidence and time-domain eigenvalue of reflect wave signals was proposed. 分析了探头调整时脉冲回波信号的变化特点,在实验的基础上构建了声束入射角与表面波时域特征值间的关系模型。
- Conclusion: The features of breast fibroadenoma were irregular, skin needling or crablike, exiguity calcify and rear active return loss, CDFI: RI>0.75. 结论：乳腺癌的特征性表现为形态不规则，毛刺状或蟹爪状，致密小钙化灶和后方回声衰减，CDFI：RI>0.;75。
- The Pulse Echo Tool(PET-AB) is introduced by Halliburton Logging Service Inc. of America at the early days of the ninties, which is the supported downhole tool of the DDL-V well logging system. AB脉冲回声测井仪是90年代初期由美国哈里伯顿公司引进的与DDL-V测井系统配套的井下仪器。
- This paper presents the principle and method for measuring various microwave devices return loss by spectrum analyzer and analyses the uncertainty of measurement. 介绍了频谱分析仪测量各种微波器件回波损耗的原理和方法，并对测量结果的不确定度进行了分析。
- SRL(structural return loss) is one of the important indicators of telecom cables, while the capacitance in water of cable may reflect the periodic defect of the production line. 结构回波损耗是通信电缆的重要指标之一,而电缆绝缘线芯的水电容可综合反映生产线上的周期性缺陷。
- Acoustic Short Pulse Echo Classification Technique 音响短脉冲回音分类技术
- Brastel business communications industry engineering equipment, optical fiber welding machines, optical time-domain launch, T-red light source, optical return loss tester, and all kinds of blades. 敝公司经营通讯行业的工程设备，有光纤熔接机，光时域发射仪，笔式红光源，光回波损耗测试仪，及各式刀片。
- The simple and intuitionistic formulas were given based on pulsed echo principle, in which the effect of dispersion and transverse sensitivity were considered. 基于脉冲回波原理，并考虑频散及横向效应等因素的影响，提出了减小频散影响的修正系数，并据此给出了简单、直观的管道裂纹检测公式；
- An unwanted false electronic pulse. 一种不希望有的假电子脉冲。
- The return of the echo will elapse longer time. 回声返回所耗的时间越长了。
