ratio data

It is proved by the analysis of the simulated signals and different signal to noise ratio experimental data that this method can effectively determine the filter center frequency and bandwidth, thereby improving the signal to noise ratio and the diagnosis of bearing faults.

通过对仿真信号和不同信噪比实验数据的分析，证明此方法能够有效确定滤波中心频率和带宽，从而提高信号的信噪比，实现对轴承故障的诊断。

Based on the data from the census 2000, this paper analyzes the characteristics and causes of high birth sex ratio in Guangdong.

本文对广东出生人口性别比偏高的现状与特点进行分析的基础上，就其危害与成因以及应采取的相应对策进行了探讨。

Airway length from the third round of the width and height dimensions there is a deviation from the time of the impact of swirl ratio, combined with anti-distortion optimization airway variety of data, re-design inlet.

第三轮从气道长向、宽向及高度尺寸存在偏差时对涡流比的影响出发，结合反变形方案优化气道的各种数据，重新设计进气道。

Data averaging and data smoothing technique efficiently improve the ratio of signal to noise.

用累加平均和数字平滑技术提高了信噪比.

The signal moise ratio was also upgraded as the resolution of seismic data was improved. Hence the ability for solving geological problems with seismic time profile was greatly enhanced.

在提高分辨率的同时，改善了资料的信噪比，从而提高了用地震时间剖面解决地质问题的能力。

Using the 44 years ( 1958& 2001) NCEP data and ozone mixing ratio data, calculating the global ozone distribution at tropopause.

利用1958~2001年的臭氧垂直分布和NCEP资料，计算出全球对流层顶的气候场，并对其空间分布、季节、年际和年代际演变进行了分析。

On the base of frame structure of H.263+, the trace-off is made in transmission scenario to transmit H.263+ frame data on mobile channel where exists high code error ratio.

从H.263＋的帧结构出发，分析了在存在较高误码情况的移动信道上传输H.263＋数据的折中方案。

It improved the signal to noise ratio and data precision by the ways of time domain average processing and adding index window before model analysis.

在模态分析前，通过时域平均处理及加指数窗等方法来提高信噪比和数据精度。

The data compression ratio and the average error of the data can be improved.

提高了数据压缩率，数据平均误差也得到了改善。

Using the data from the fifth population census, this paper analyzes quantitatively the sex ratio of the same age, relative sex ratio and sex ratio of match from the population match perspective.

摘要本文利用五普数据，从人口数量匹配的角度，定量的分析和比较了同龄性别比，相对性别比和婚配性别比。