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检波理论
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  “检波理论”译为未确定词的双语例句
     A new method and theory about seismic survey is presented . It is a new seismic exploration technology to detect seismic waves.
     提出了一种新的检波理论和方法 ,它是一种实现检测地震波信号的地震勘探技术。
短句来源
     A new theory and method of detection for signal of weak seismic wave is presented.
     提出了一种微弱地震波信号新的检波理论和方法 .
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  相似匹配句对
     These methods are analyzed specifically in theory.
     从理论上详细分析比较了几种检波方法.
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     n-FOLD NUMBER THEORY
     n重数理论
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     The Theory of the Rainbow
     虹的理论
短句来源
     A new theory and method of detection for signal of weak seismic wave is presented.
     提出了一种微弱地震波信号新的检波理论和方法 .
短句来源
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  detection theory
Signal detection theory applied to three visual search tasks - identification, yes/no detection and localization
      
A Signal Detection Theory (SDT) model, tailored for each task, accounts for the set-size effects observed in identification and localization tasks, and slightly under-predicts the set-size effect in a detection task.
      
In the simplest form of signal-detection theory (SDT), all stimuli give rise to equalvariance Gaussian probability density functions (PDFs) of sensation, with means proportional to stimulus intensity.
      
Under a signal detection theory approach, the transducer model of contrast perception states that the internal response elicited by a stimulus of contrast c is a random variable with mean μ(c).
      
We conclude that signal detection theory provides a useful tool to supplement conventional approaches to understanding colour constancy.
      
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A new method and theory about seismic survey is presented . It is a new seismic exploration technology to detect seismic waves. As a sensory unit, grating vibrator translates mechanical vibration of seism into photo-modulating signal, called Moiré fringe, which is converted into digital electronic signal by photoelectric parts after them. Due to the direct digital output of geophone by the pulse style and sampling by pulse counting, the impact area to deferent data, coming from the different accuracy of devices,...

A new method and theory about seismic survey is presented . It is a new seismic exploration technology to detect seismic waves. As a sensory unit, grating vibrator translates mechanical vibration of seism into photo-modulating signal, called Moiré fringe, which is converted into digital electronic signal by photoelectric parts after them. Due to the direct digital output of geophone by the pulse style and sampling by pulse counting, the impact area to deferent data, coming from the different accuracy of devices, is turned away. And so the packaging technology is simplified. The working principle, parameter arithmetic, tested measurement, experimental result are given.

提出了一种新的检波理论和方法 ,它是一种实现检测地震波信号的地震勘探技术。采用光栅谐振子为敏感元件 ,将大地震动的机械信号转换成光调制信号—莫尔条纹 ,再用光电接收器件将其转换成数字化电信号输出。光栅谐振子检测地震波的装置能够直接将大地震动的机械信号转化为脉冲数字信号输出 ;并以记数的形式采样 ,避免了器件的精度不同对传感器输出的数据质量的影响 ,从而简化了组装工艺。文中阐述了该方法的工作原理、参数计算、测试方法和实验结果

A new theory and method of detection for signal of weak seismic wave is presented. As the sensory unit, the vibrator of grating sensor is designed to measure micro-vibration, and transform the vibration of ground into light modulating signal-Moiré fringe, and then, change it into digital signal by photoelectric elements. Using 80 times subdivision technology, resolving power is enhanced to 125 nm;by use of MATLAB,the vibration process is reconstruct according to the recorded signal of PIC. In the structure,...

A new theory and method of detection for signal of weak seismic wave is presented. As the sensory unit, the vibrator of grating sensor is designed to measure micro-vibration, and transform the vibration of ground into light modulating signal-Moiré fringe, and then, change it into digital signal by photoelectric elements. Using 80 times subdivision technology, resolving power is enhanced to 125 nm;by use of MATLAB,the vibration process is reconstruct according to the recorded signal of PIC. In the structure, two springs limiting lateral vibration and two grating adjusters are designed to effectively reducing errors coming from grating gap and angle, by which the gating gap and angle can be adjusted. And the accumulative error is corrected meanwhile. The lateral vibration is effectively restrained; the system precision is increased, and demand to lateral vibration limiting is brought down, all of these are availed to configuration design. Because of the direct digital pulses output of grating sensor, the influence of different precisions of the devices to data quality is avoided, and the assemblage technology is simplified. Configuration design, theory analysis, directions distinguish and subdivision technology are presented as emphasis. Test data and conclusion is attached at last.

提出了一种微弱地震波信号新的检波理论和方法 .设计了一种测微振动传感器 ,采用光栅谐振子为敏感元件 ,将地震的机械信号转换成光调制信号———莫尔条纹 ,再用光电器件将其转换成数字化电信号 .采用 80倍细分技术 ,使传感器分辨力达到 12 5nm ;用MATLAB软件对PIC单片机记录的信号进行振动过程重构 .结构中设计了横向限振片和光栅调节器 ,对光栅间隙、光栅间纵横向夹角进行调节 ,有效地限制了光栅间隙及角度的变化产生的误差 .同时也校正了光栅的累积误差 .有效地抑制了横向振动 ,提高了系统精度 ,同时可降低对该系统的横向限振要求 ,有利于结构设计 .由于该传感器直接将地震的机械信号以脉冲数字信号输出 ,避免了器件精度不同对传感器输出数据质量的影响 ,简化了组装工艺 .重点介绍了光栅数字地震检波器的结构设计、理论分析、辨向细分技术等 .最后给出了测试数据和结论

For flat structuring element filtering, a branch of mathematical morphology, length selection of structuring element is the key to its application to engineering design. Based on detection theory and time-frequency-domain analysis of the fundamentals of mathematical morphology filter, it is found that the ratio of the signal numerical frequency to length of structuring element determines the attenuation magnitude of signal. Then the criteria for the selection of flat structuring element is obtained and applied...

For flat structuring element filtering, a branch of mathematical morphology, length selection of structuring element is the key to its application to engineering design. Based on detection theory and time-frequency-domain analysis of the fundamentals of mathematical morphology filter, it is found that the ratio of the signal numerical frequency to length of structuring element determines the attenuation magnitude of signal. Then the criteria for the selection of flat structuring element is obtained and applied to preprocessing electrocardiograph (ECG). The arithmetic is simulated with Matlab software, and then transplanted to DSP hardware platform. It is shown that the method can effectively and instantly eliminate baseline drift of ECG, which fulfills the demand of final-period processing.

数学形态学是非线性数字信号处理学科的热门课题,将其分支——平结构元滤波用于工程设计时,结构元长度的选取是关键.为此,从检波理论出发,讨论形态学滤波器消除基线漂移的机理,分析其时域和频域特点,得到信号的衰减幅度由信号数字频率与结构元长度的比值唯一决定的性质,并归纳出一套平结构元长度选取标准。将其用于心电预处理,借助Matlab软件进行算法模拟并移植到DSP硬件平台.实验表明,该方法能有效并实时滤除基漂,符合后期处理需要.

 
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