查询词典 spectrum line

A region superresolution spectrum estimation method based on coventional DFT computation is presented for obtaining one dimensional range profile, which has the advantages of real-time in computation and robustness under clutter and noise background over general superresolution methods. A iterative extropolation method based on both priori knowledge provided by conventional DFT spectrum and matching filtering process of target return data is also presented for range profile processing, which has the advantages of robustness in improving range resolution, suppressing clutter and noise.

在目标一维距离成像谱估计中，提出了以常规DFT为基础的邻域超分辨谱估计方法，它与普通超分辨算法相比，具有实时性强、在杂波与噪声背景中稳健性好的优点；在外推成像处理中，提出了以常规DFT目标结构图像为约束条件并结合目标信号准匹配滤波处理的迭代外推算法，其优点是稳健性好，能适度地提高距离分辨力但保留适度的抗杂波抗噪声能力。

This paper points out that as the peak of the first order wind spectrum situated at a region of very low frequency, the contribution of the sum_frequency part to the second order wind spectrum is no longer negligible.

本文指出，由于风速谱与波浪谱不同，它的能量峰值位于极低频率处，因此二阶风速谱中和频项的贡献不能忽略，为此本文首先导出了保留和频项情况下的二阶风速谱表达式，并将和频项与差频项在数值上作了比较。

The films were characterized with X-ray diffraction spectrum, Raman scattering spectrum, Atomic Force Microscope and High Resolution Transmission Electron Microscope .

氢化纳米硅薄膜因其中纳米级硅晶粒的量子尺寸效应，具有高电导、发光等优良的光电特性，在微电子、光电子等领域具有广阔的应用前景。

It acquired the interference signal of He-Ne laser whose wavelength is 632.8nm by this FMI. Fourier Transform algorithm is used to calculate the spectrum. The difference between the spectrum acquired by our experiment and by traditional grating spectrometer are also analyzed which can present helpful reference to develop FFTS further.

使用该干涉仪测量了632.8nm He-Ne激光光源的干涉信号，采用傅里叶变换算法计算了其光谱图，并与传统光栅光谱仪测量的光谱图进行了比较，分析了两者存在的差异及其原因，为FFTS的后续研制工作提供了有益参考。

Loser here is the frequency spectrum of the distribution curve, complex oscillation amplitude is decomposed into different frequency and different harmonic oscillation, the oscillation amplitude harmonic frequencies arranged in accordance with the graphics is called the spectrum.

在这里输频谱就是频率的分布曲线，复杂振荡分解为振幅不同和频率不同的谐振荡，这些谐振荡的幅值按频率排列的的图形叫做频谱。

The IR spectrum analysis results of the level of humification are consistent with those obtained from ultra-violet spectrum analysis.

其中，缙云山腐殖土腐殖酸的E465/E665最大，说明其分子的腐殖化程度、芳构化度和分子复杂程度等最小。

The application of reflected optical difference system in surface crack of aluminum detection is also discussed. By analyzing the experimental data, we found that the reflected pulsed wave techniques could be used to measure the position of crack precisely and depth imprecisely. Transmitted wave contain much size information of the crack, despite without position information. The spectrum of transmitted is sensitive to the depth of crack. The deeper the crack is, the narrower the spectrum bandwidth is.

使用自建的光偏转差分检测系统，对铝样品中多种表面缺陷进行了检测，对表面波直达波，反射波，透射波波形及频谱进行了分析，讨论超声表面波与各种缺陷相互作用后的变化，通过对实验结果的分析，发现缺陷脉冲发射法可以精确测定缺陷位置，粗略估计缺陷深度；而透射法测的波形无法定出缺陷位置，但包含了缺陷大小信息，透射波频谱对缺陷深度非常敏感，随缺陷深度的加深，频谱不断的左移。

Power spectrum ; inverse spectrum ; machinery fault diagnosis

功率谱；倒频谱；机械故障诊断

Though the excitation spectrum got by inverse LPC filtering is flatter than the original spectrum, it contains many important fine characteristics.

经LPC逆滤波后的激励谱虽然比原始谱平坦，但仍包含许多重要的精细谱特征。

Because the traditional methods of measuring the energy spectrum adopt the single-channel and multiple-channels which results in needing certain distinguish time and cannot solve the problem of superimposed effect of near pluses, a new method adopting the inverse filter to measure energy spectrum is proposed.

由于传统测量能谱的方法是采用单道、多道的方法，其有一定的分辨时间，并且无法克服相近脉冲的迭加效应，提出了采用逆滤波器法测量能谱的方法。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。