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  “相关脉冲”译为未确定词的双语例句
     As for the frequency estimation methods, this thesis realized the CPPC power spectral moment estimates and proved it to be accurate and reliable.
     在频率估计算法方面,本文重点研究相关脉冲对协方差法(CPPC)谱矩估计。 结合计算机在不同条件下的仿真结果,证明了相关脉冲对协方差法谱矩估计方法具有较好的性能。
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     Time correlation is necessary for analyzing correlation impulse and its development process, researching its intrinsic rule when measuring impulse radiation multi -way signal.
     脉冲辐射多路信号测量中,进行时间关联,对于分析相关脉冲及其发展过程,研究它们之间的内在规律是十分必要的。
  相似匹配句对
     Contrast Ratio Measurement of Laser Pulses Using Correlation Technology
     利用相关技术测量激光脉冲的对比度
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     Correlation Detection of Weak Laser Pulse Signals
     微弱激光脉冲信号的相关检测
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     Pulse plating of Nickel
     脉冲镀镍
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     Pulse Zn Electroplating
     脉冲镀锌
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     The frame includes aseries of guidelines 、process、related methods.
     相关的方法。
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  coherent pulse
The weak coherent pulse experiences a greatly enhanced transparency.
      
Example applications of such control are presented and include the generation of a frequency comb spanning nearly three optical octaves, and the creation of a train of 30-fs pulses via coherent pulse synthesis.
      
Based on the periodic phase shift of coherent pulse sequence waveform, a new estimation of multi-targets' 2-Dimentional (2-D) DOA angle, Doppler frequency shift and relative time-delay is proposed.
      
The first category represents an important class of fluctuation models which when illuminated by a coherent pulse train, return a train of fully correlated pulses (Swerling I model) or fully decorrelated pulses (Swerling II model).
      
The excitation of two-level atoms in a laser field comprising many equally spaced coupled laser modes corresponding to a coherent pulse train is examined.
      
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The applicatcation of surface acoustic wave(SAW)devices in generating and processing signals has been become an active branch in electronics, since the SAW technology penetrated into electronics. It is proved experimentally that a nonlinear frequence modulation(N—FM)signal can be generated by N—FM SAW dispersive delay line(DL). The N—FM—DL can be implemented by a double dispersive structure(DD). In this article some results about the study of a SAW power series FM—DL(PFM—DL)with time—bandwidth product of 160...

The applicatcation of surface acoustic wave(SAW)devices in generating and processing signals has been become an active branch in electronics, since the SAW technology penetrated into electronics. It is proved experimentally that a nonlinear frequence modulation(N—FM)signal can be generated by N—FM SAW dispersive delay line(DL). The N—FM—DL can be implemented by a double dispersive structure(DD). In this article some results about the study of a SAW power series FM—DL(PFM—DL)with time—bandwidth product of 160 and fractional bandwidth of 32% are presented. Both the method of frequence spectrum evolution and the way of seeking new coefficient, designing DD—PFM—DL, have been suggested. Calculated and observed results of frequence spectra, self—correlation pulces and group delay curves of these DL have been shown. Generally speaking, thse methods will be also applied to design any N—FM—DL. However, it must be noted that it can be used only when the relation of Fourier transform between frequence domain and time domain(ie, the geometrical patten of Interdigital transnsducer)is kept.

自从声表面波(SAW)技术渗透入电子学领域以来,应用SAW器件产生讯号和处理讯号已成为电子学中的一个活跃分技。实践表明,非线性调频讯号能用非线性调频SAW色散延迟线产生。非线性调频SAW色散线也能够由双色散结构来实现。本文报道了对时带宽积为160,相对带宽为3%的冪级数调频SAW色散线的研究结果。提出了两种设计双色散结构(DD)的冪级数调频色散线(PFM-DL)的方法。给出了理论计算的和实验观察到的频谱、自相关脉冲、群延迟特性。一般说来,这些方法也适用于其他非线性调频色散线。要注意的是,只有频域和时域即叉指换能器的几何图形之间保持着福氏变换关系时才能运用这一方法。

The applicatcation of surface acoustic wave (SAW) devices in generating and processing signals has been become an active branch in electronics,since the SAW technology penetrated into electronics.It is proved experimentally that a nonlinear frequence modulation (N-FM)signal can be generated by N-FM SAW dispersive delay line (DL).The N-FM-DL can be implemented by a double dispersive structure (DD).In this article some results about the study of a SAW power series FM-DL(PFM-DL)with time-bandwidth product of 169...

The applicatcation of surface acoustic wave (SAW) devices in generating and processing signals has been become an active branch in electronics,since the SAW technology penetrated into electronics.It is proved experimentally that a nonlinear frequence modulation (N-FM)signal can be generated by N-FM SAW dispersive delay line (DL).The N-FM-DL can be implemented by a double dispersive structure (DD).In this article some results about the study of a SAW power series FM-DL(PFM-DL)with time-bandwidth product of 169 and fractional bandwidth of 32% are presented.Both the methed of frequ- ence spectrum evolution and the way of seeking new coefficient,dasigning DD -PFM-DL,have been suggested.Calculated and observed results of frequence spectra,self-correlation pulces and group deluy curves of these DL have been shown.Generally speaking,thse methods will be also applied to design any N-FM-DL.However,it must be noted that it can be used only when the relation of Fourier transform between frequence donmain and time domain(ie, the geometrical patten of Interdigital transnsducer) is kept.

自从声表面波(SAW)技术渗透入电子学领域以来,应用 SAW 器件产生讯号和处理讯号已成为电子学中的一个活跃分技。实践表明,非线性调频讯号能用非线性调频 SAW 色散延迟线产生。非线性调频 SAW 色散线也能够由双色散结构来实现。本文报道了对时带宽积为160,相对带宽为3%的幂级数调频 SAW 色散线的研究结果。提出了两种设计双色散结构(DD)的幂级数调频色散线(PFM-DL)的方法。给出了理论计算的和实验观察到的频谱、自相关脉冲、群延迟特性。一般说来,这些方法也适用于其他非线性调频色散线。要注意的是,只有频域和时域即叉指换能器的几何图形之间保持着福氏变换关系时才能运用这一方法。

Using surface layer chlorophyll-α concentration data obtained bycontinuous flow measurement along ten transacts in the East China Sea (118-129° E,24-32°N) in April, 1994, the authors analysed the distribution characteristics andthe variation regularity of surface layer chlorophyll-α concentration on differentspatial sca1es (0.01- 100km) in the East China Sea The findings were as follows:chloroPhyll -α coneentration is comparatively high in the continental shelf and low inthe open seas; the observed coneentration...

Using surface layer chlorophyll-α concentration data obtained bycontinuous flow measurement along ten transacts in the East China Sea (118-129° E,24-32°N) in April, 1994, the authors analysed the distribution characteristics andthe variation regularity of surface layer chlorophyll-α concentration on differentspatial sca1es (0.01- 100km) in the East China Sea The findings were as follows:chloroPhyll -α coneentration is comparatively high in the continental shelf and low inthe open seas; the observed coneentration in the south area is generally higher thanthat in the north The variation of the distribution pattern of chlorophyll-αconeentration is great, in some deep waters of the open seas, the variation of theconcentraton was not obvious within several hundreds of kilometers, the rang of thevariation was lower than 0.2 mg /m3, while in some shallow offshore waters, therange of the variation within one kilometer was high and up to 1.5 mg /m3 Therewere generally three kinds of variations of chiorophyll-α concentration variation of0.01 - 0.1km in spatial scale, 0.1 - 0.2 mg /m3 range influenced by short temporalscale and small spatial scale physical processes such as turbulenee and wave;pulse-shaped variation with 1 - 10km spatial scale, 1.0 - 2.0 mg /m3 range,correlated to both biological oceanographic processes and physical oceanographicprocesses such as population growth of phytoplankon and sea fron; variation of100km spatial scale, 1.0 - 2.0 mg /m3 range, renecting the productivity level of largespatial scale physical processes such as water masses and current systems Theamplitude of power spectra tends to decrease when wave-number increases, showingthat the bigger variation corresponds to larger spatial stretch

依据“科学一号”调查船1994年4月在东海10个断面上所进行的表层水连续走航观测资料(总航程3600km,47万个观测数据),研究东海表层水叶绿素α含量在不同空间尺度(0.01-100km)上的分布特征和变化规律、结果表明,叶绿素α含量在陆架区高,在外海抵;测区南部海域的含量一般高于北部海域。叶绿素α含量的分布形态变化很大,在某些外海深水区,叶绿素α含量连续百余公里没有显著变化,变化幅度小于0.2mg/m3;而在某些近海浅水区,叶绿素α含量在不到1公里范围内的变化幅度达1.5mg/m3。叶绿素α含量大体存在着三种不同尺度的变化:普遍存在的0.01-0.1km量级的小尺度小幅度变化;1-10km量级的与斑块分市相关的脉冲式变化;更大尺度的与水团生产力水平相关的变化。功率谱随波数增加呈下降趋势,说明大幅度变化对应大空间尺度。

 
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