frequency space的例句大全

For detecting the vibration frequency the dynamic systems, and using topology contravariant functor the unknown space was mapped to known space, the vibration frequency of unknown space will be investigated by the contravariant functor.

为了分析动力系统振动频率的瞬变性，采用拓扑反变的理论把未知的动力系统空间映射到已知的空间中，通过拓扑反变算子研究未知的空间频率的瞬变性。

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According to optical transfer function, degree of modulation and apperceive degree of space frequency vision vs object image, TIFF grayscale scenograph is made.

根据光学传递函数、调制度和空间频率视觉及对物象的感知程度，制作TIFF格式透视灰度图。

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Finally the term-document space is constructed by vector space model with term frequency weight. Secondly, the latent semantic analysis is studied.

向量空间采用词频作为权值的向量空间模型构建。其次，研究了潜在语义分析模型。

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The numerical results show the two-stream instability of two electron beams can produce Cherenkov radiation through the interaction between the fast space charge wave and the slow space charge wave, and the frequency of radiation can be above the plasma frequency.

针对不同参数对色散方程进行数值计算，发现当两根电子注之间存在速度差时，通过快慢空间电荷波的相互作用，两电子注引起的双流不稳定性可以产生契伦柯夫辐射；

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A minimum of the imaginary part of the dielectric constant was observed at lower frequencies from the frequency dependence of the dielectric constant, this implies the existence of imperfections and space-charge polarization in the crystals.

介电系数的频率特性显示，介电系数虚部在较低频率时呈现极小值，这表明晶体中存在缺陷和空间电荷极化。

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Joint signal carrier frequency and 2D DOA estimation method based on space-time processing A Cascaded Jammer and Clutter Cancellation Architecture of STAP

基于时空处理的频率与二维DOA联合估计算法一种级联结构的空时二维信号处理算法

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In this paper, a space-time processing receiver for WCDMA is presented for the uplink over the Gaussian channel and frequency selective Rayleigh fading channel.

本文针对处于加性高斯白噪声和频率选择性多径衰落信道下的WCDMA系统，提出一种空时处理的接收方案。

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The wavelet analysis theory and Fourier transform, the window Fourier transform time are compared to the space-time and frequency local transformation, and thus more effective in extracting data from the signal information.

小波分析理论与傅立叶变换、窗口傅立叶变换相比是时空和频率的局域变换，因而更能有效地从信号数据中提取信息。

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Tradeoff of Frequency Bands and Operation Systems for Space Object Detection and Identification Radars

空间目标探测与识别雷达工作频段与体制选择探讨

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With the increasing frequency of space exploration, spacecraft observation scheduling has become one of the research focuses in academic and engineering field.

随着航天观测活动的日益频繁，航天器观测调度问题亦成为学术界和工程界的研究热点之一。

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Sample time staggered space vector modulation ( STS-SVM) technique is a novel switching modulated strategy, which can acquire much high equivalent switching frequency at fairly lower device switching frequency and have excellent harmonic characteristics.

错时采样空间矢量调制是一种新型的开关调制策略，能够在较低的器件开关频率下实现较高等效开关频率的效果，具有良好的谐波特性。

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The frequency formula of prestressed reinforce double layer space grids is deduced.

给出了预应力网架固有振动频率的分解刚度法，推导出预应力网架频率计算公式。

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Multiple Input Multiple Output ( MIMO) antenna is a typical spatial diversity technique, by combining multiple antennas space-time block coding with orthogonal frequency division multiplexing ( OFDM) forming space-frequency block coding, In multipath channel fading conditions, which also can get additional frequency diversity gain.

多输入多输出天线既是一种空间分集技术，将多天线中的空时分组编码与正交频分复用技术相结合构成空频分组编码，在多径衰落信道条件下还可以获得额外多径分集增益。

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Based on it, we doa deep research on the space distribution and time distribution from the view of term frequency, mutual information and word similarity.

在此基础上，我们进行了新词特征的挖掘，从串频、互信息和相似度等角度主要对新词的空间分布规律和时间分布规律进行了分析。

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It can compute the seismic resolution limit in time and space ( 1/ 4 wavelength) according to seismic apparent dominant frequency and the velocity of targets.

根据地震视主频和目的层的速度可以计算出空间和时间地震分辨率（1/4波长）极限。

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Last, the effect on structural basic frequency by partial scathing components and the scathing parts' position in the scathing space truss structure may be found out by anti-analysis.

最后，总结出特定空间网格结构正常使用允许的频率范围，以及部分构件损伤对结构基频造成的影响，从而反分析出有损伤的空间网格结构的损伤部位。

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Feasibility Study on Tuning Fork Used as Space Frequency Modulator

音叉作为空间频率调制器可行性的研究

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Based on this, Space-Time Coding is offered, which can realize very high frequency efficiency and data transmission rate.

基于此，人们提出了空时编码（Space-Time Coding）技术，它能够实现非常高的频谱利用率和数据传输率。

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The reusability of space vehicle plays a very important role in reducing transport costs, increasing carrying capacity and launch frequency.

航天运载器实现可重复使用是降低航天运输成本，提高运载能力和发射频度的必由之路。

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At the same time, space vector groups are optimized, the optimized SVPWM can guarantee output performance of converter does not fall when switching frequency properly decrease.

采用优化后的开关矢量，可以在减小器件开关次数的情况下，仍能保证变频器输出性能。

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