长信号

Nearest-neighbor pattern recognition can recognize low modulating frequency of FSK in higher sam- pling frequency, avoiding the disadvantage of sub-Nyquist sam pling .

最近邻模式识别法在采用较高采样频率而导致频谱分辨率不高的情况下仍可准确检测FSK信号，有效避免了以往欠采样带来的采样时间较长的弊端。

One traditional sign of a decade-plus top in a market is the entry of well-financed, but less well-informed punters.

一个传统信号预示着长达10余年的牛市即将见顶：资金充裕但缺乏信息的投机者入场。

And then, a three-electrode system was designed instead of the original two electrode system for the head stage of the pre-amplifier, which leads to an significant increase of the signal-to-noise ratio and evident reducing of the distortion of the spikes .

针对输出信号失真，噪声偏大以及难以长时间采集的问题，将原来记录用的两电极系统改为三电极系统，并发展出声卡采集技术，基本解决了上述问题，得到了良好的效果。

Based on coupled-mode theory and transfer matrix, numerical results show that about 1 m of such thin-clad chirped LPFG can compensate 46 km fiber's dispersion.

利用耦合模理论及传输矩阵法计算了约1 m长的此种啁啾LPFG的色散，结果表明可以补偿该光信号通过46 km光纤所产生的色散。

He also sent a strong signal that he understood the depth of popular feeling about the Iraq war by announcing that he will replace his defence secretary, Donald Rumsfeld, a man who has become a symbol of everything that has gone wrong in Iraq, with Robert Gates, a relatively straight-shooting former head of the CIA.

他也发出了强烈信号，说他理解民众深刻的感受，宣布他将撤换国防部长拉姆斯菲尔德，拉氏已经成了伊拉克所有错误的标志，防长继任者为中情局的前负责人罗伯特

He also sent a strong signal that he understood the depth of popular feeling about the Iraq war by announcing that he will replace his defence secretary, Donald Rumsfeld, a man who has become a symbol of everything that has gone wrong in Iraq, with Robert Gates, a relatively straight-shooting former head of the CIA.

他也发出了强烈信号，说他理解民众深刻的感受，宣布他将撤换国防部长拉姆斯菲尔德，拉氏已经成了伊拉克所有错误的标志，防长继任者为中情局的前负责人罗伯特？盖茨，相对而言，他坦白正直。

Then the influence of flow, pipe length, setting pressure of relief valve and stiffness coefficient of main valve spring on the water hammer peak pressure at the instant of fuel pistol closing was studied according to the detected pressure signals. Finally, the relatively accurate gas-liquid separation value and critical cavitation pressure value of the system was obtained by frequency analysis and wavelet analysis.

根据测得的压力信号，对燃料枪关闭瞬间流量、管长、溢流阀调定压力以及主阀弹簧刚度对水击效应引起的峰值压力的影响进行研究，并通过频率分析方法和小波分析方法较精确地获得系统的气液分离值和临界汽蚀压力点。

We analyzed the air gun signals in the 185Km-long seismic line. And the records showed that the air gun signal is full of seismic phase information. Based on these phases, we developed the P-wave velocity model for this area and find an obvious low-velocity layer, which is coherent to what people obtained from other geophysical methods in this area.

我们分析了气枪激发信号在长185km测线上的记录，拾取包含的丰富震相信息(如Pg，Pn，PmP等)，并在此基础上反演了该地区的P波速度模型，模型结果显示该地区存在明显的低速层，这与在该地区进行的其他地球物理探测结果一致。

So, in a nutshell: Accelerometers are right in the long term but wrong in the short term.

一言以蔽之，加速度计在较长时间的测量值是正确的，而在较短时间内由于信号噪声的存在，而有误差。

According to the typical flow distribution, the dynamic optimization model which adopt cycle length and split as the decision variables is set up, and the simulations are conducted in the condition of light, moderate and heavy traffic demands respectively.

针对典型的交叉路口交通流分布，以信号周期时长和绿信比为优化控制变量，建立了相应的交通流动态优化控制模型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。