term frequency的例句大全

Both short and long term frequency stabilities of the simultaneous oscillations are better than several Parts 1010.

它可使同时振荡的双波长之频率稳定度不论短周期或长周期都优于10－10。

the noise bandwidth and dead time in the measurement of short-term frequency stability

短期频率稳定度测量时测量带宽和间隙时间的确定

Therefore, a text categorization algorithm based on frequent patterns with term frequency is presented.

为此, 提出了基于分类规则树的带词频的频繁模式文本分类方法.

Treatise on the problem of short term frequency stability in Doppler-velocity measurement

多普勒测速的频率短期稳定度问题

This article puts forward the concept of Chinese and English dictionary with reverse term frequency.

提出了带反向词频的中英文词典这一概念。

Application of Weight Calculation Based on Term Frequency for E-mail Filtering

基于词频的权值计算在邮件过滤算法中的应用

Measurement of short term frequency stability and phase noise of frequency source

频率源的短期频率稳定度及相位噪声测量

A Text Classification Method Based on Term Frequency Classifier Ensemble

基于词频分类器集成的文本分类方法

Choice A study of Feature Selection for Text Categorization Base on Term Frequency

基于词条频率的特征选择算法研究

A Novel Detective Method for Fundamental Current and Any Term Frequency Harmonic Current

基波电流和任意次数谐波电流检测新方法

Ultrashort term frequency forecasting control for a Hydropower Station

水电站超短期预报频率控制

The results show that it has better short term frequency stability and frequency drife performance with temperature.

试验表明，它具有良好的短期频率稳定度和温漂特性。

Comparison on the long term characteristics from two transfer techniques on satellite time and frequency

卫星时间频率两种传递技术的长期特性比较

Believable b values and η values were tested, and frequency seismological anomalies and fixed point tidal deformation anomalies were found before strong mining-induced earthquake in the short-term and impending stages.

发现震前短临阶段存在可信的b值、η值、频度等地震学异常和定点潮汐形变前兆异常。

This method uses wavelet packet decomposing the WVD of the signal and reconstructing the time frequency diagram according to the decomposition coefficient. It can remove cross-term efficiently. Theoretical analysis and experimental results proved the validity of the method.

基于小波包分析，利用小波包对信号的威格纳时频分布进行分解，并利用分解系数重构时频图，使交叉项得到抑制和改善，实验结果表明此方法简单有效。

The determination of time discrimination and frequency discrimination and the selection of a window function in the short-term Fourier transform ( STFT) were discussed to analyze the vibrational signals from a high-pressure hydraulic pump unit.

对水泵机组振动信号分析中短时傅立叶变换的时间分辨率和频率分辨率的设定、窗函数的选取进行了研究。

Because of these advantages, it is believed that CPT frequency standards are promiseful in long-term application in military and civilian area, such as long-distance communication systems timing, large-area network synchronization and the portability of weapons and equipment.

由于这些特点，CPT原子频标在远程通讯系统定时、大范围通讯网络同步、武器装备的便携化等军、民用方面具有很好的应用前景。

The Improvement of Physics Package and the Long-term Stability Measurement for Rb Frequency Standard

铷频标物理部分的改进与长期稳定度的测量

Finally, the Chinese translation of English term is selected by threshold value, which varies word frequency.

最后通过设定随词频变化的阈值来选取中文翻译.

In the database subsystem, the retrieved documents are represented by the fuzzy relational matrix of index-terms-documents, for each index term is weighted by a numerical weight according to its presence frequency in the document.

在数据库子系统，用索引词&文档模糊矩阵表示待检索的文档，对每个索引词，根据其在文档中的出现频率大小，引入了数值权重；