查询词典 scan frequency

In chapter 5, heat mechanism and heat radiating forms of the hydraulic system faults are studied. Based on relationship between degree of the hydraulic system faults and thermal image shapes, multi-scale entropy of temperature field is taken to express the fault degree. Entropy of low frequency means its absolute temperature, and entropy of high-frequency means distribution of temperature field.

同时针对系统故障程度的不同，提出了用温度场的熵进行表征的思路，通过多尺度小波对原热场图像进行小波变换，提取其中低频分量的熵用来衡量其绝对温度大小，提取高频分量的熵来衡量其温度场的分布，给出了实验结果，通过实验结果分析，证明这种分析方法是可行的。

In order to measure the tuning wavelength of a frequency-doubled Nd:YAG laser,strong absorption lines of molecular iodine near 532nm was adopted to provide the absolute reference for frequency stabilization.

为了精确测量倍频Nd：YAG激光器的调谐波长，采用碘分子在532nm附近的强吸收谱线作为频率稳定的绝对参考谱线，建立了以碘蒸气为标定物的激光调谐波长测定系统，实际测量了碘蒸气吸收谱线。

Absolute frequency , frequence , oftenness , relative frequency

绝对频率，绝对频率可听声频率，音频，成声频率

Molecular iodine has rich strong absorption lines near 532 nm that can provide the absolute references for frequency stabilization. A monolith solid laser was tuned at the spectrum of transition R (56) 32-0 of iodine molecule with new modulation frequency 375 kHz.

使用532 nm单块固体激光器，在375 kHz新的调制频率下，利用调制转移技术，将激光频率调谐到127I2的R(56)32-0跃迁的吸收谱线，并观察到该吸收谱线相应的15条超精细结构分量。

Extract information based on the instantaneous features : In the center is one of the instantaneous rate of the power spectral density of the maximum, is a center to the absolute value of the instantaneous rate of the standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component absolute standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component standard deviation, In the center is one of the non-weak signal of the absolute value of the instantaneous frequency standard deviation, a signal to one of the instantaneous frequency of the power spectral density of the maximum, According to 16QAM and QPSK signals XI axis projection in the different performance parameters raised.

提取信号七个基于瞬时信息的特征：零中心归一化瞬时幅度功率谱密度的最大值，零中心归一化瞬时幅度绝对值的标准偏差，零中心非弱信号段瞬时相位非线性分量绝对值标准偏差，零中心非弱信号段瞬时相位非线性分量标准偏差，零中心归一化的非弱信号段瞬时频率绝对值的标准偏差，一个信号段的归一化瞬时频率功率谱密度的最大值，根据信号 QPSK 和16QAM在 XI 轴投影的不同表现，提出特征参数。

The frequency selecting absorbing effect of stratum medium on seismic wave keeps more information of medium characteristics in the low-frequency components.

地层介质对地震波的这种选频吸收作用使得在地震波的低频成分中保留了更为丰富的反映介质性质的信息。

Using direct calculation method can easily change in acceleration and deceleration time, maximum start frequency, maximum operating frequency in order to adapt to different processing conditions.

采用直接计算的方式可以方便的改变加减速的时间、最高启动频率、最高运行频率以适应不同的加工状况。

As walk-off angle and acceptance angle of beam limit the conversion efficiency and the tunable wavelength range of difference frequency generation, research include effective nonlinear coefficient, walk-off angle and acceptance angle as functions of wavelength, the relationship between conversion efficiency and acceptance angle, and the impact of crystals length on the process of frequency conversion.

由于光束的走离角、允许角限制了转换效率和差频调谐波长范围，研究内容还涉及了有效非线性系数、走离角和允许角与波长的关系，转换效率与允许角的关系，以及晶体长度在频率变换过程中产生的影响。

In frequency measurement module, a method of high accuracy frequency measurement is i...

在频率测量模块中，采用多周期同步测量与量化延迟法相结合的高精度频率测量方法，使测量分辨率达到了0.1Hz，满足系统的要求。

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因为一个新站，搜索引擎一般是不会知道你的，提交完，然后就是接着更新文章，把自己的网站地址发到一些更新频率比较高的地方，这样搜索引擎才有可能爬到你的站上，而且对google的收录也非常有帮助，烟台seo站一天就被google收录得益于我在站长网写了一篇软文，站长网的更新频率很高，我发布的软文差不多两个小时吧就可以在搜索引擎中找到了，同时这也算是个外链吧，google搜索引擎很喜欢外链，假如你能在短期内搞到个高质量的外链，然后再提交下的话，一般google很快就能收录你的站了。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。