frequency selection的例句大全

The optimal extraction process was selected with the orthogonal design, taking four main factors which effected the selection process: ethanol concentration, solvent volume, extraction time, extraction of the frequency of three levels of each factor to test.

本文采用正交设计对怀牛膝总皂苷提取方法进行了研究，选择乙醇浓度、溶剂量、提取时间以及次数作为影响ABS醇提取工艺的4个主要因素。每个因素3个水平进行试验。

The parameter selection of frequency regulation resonance test device and its application is presented.

介绍了某公司调频谐振耐压试验装置参数的选型和应用情况。

The commonly used feature selection methods include Information Gain, Mutual Information,χ 2 statistics, Expected Cross Entropy, Word Frequency method, Document Frequency method, Text Evidence and so on.

首先要进行特征选择，常用的特征选择方法包括：信息增益、互信息、χ2统计、期望交叉熵、词频方法、文档频次方法、文本证据权等。

the theory of group selection proposed an explanation-even if the frequency of altruists is decreasing in every group of a deme, it can still increase in the whole population.

群体选择理论对此提出了一个解释，即尽管由于利他者相对于利己者处于不利的位置，利他者在每一个群体中的频率都会下降，但利他者在总体中的频率却有可能上升。

the selection of revolution frequency about flip-flow screen

弛张筛转速的选择

the influence of selection of magnetic material on its experimental performance in low frequency interference current probe

低频干扰电流探头中磁芯材料的选择对其检测性能的影响

Then the tests on selection of parameters such as sampling frequency, time interval and model order are made and their impact on the result of Prony analysis is analyzed.

测试了时间长度，采样频率以及Prony模型阶数对分析结果的影响。

the frequency range selection for measurement of partial discharge in transformer oil with uhf method and interference suppression

油中局部放电UHF频带选取及干扰的抑制

The selection of the insulator applied for a power very low frequency transmitting antenna were studied.

本文对大功率甚低频发射天线用绝缘子的选型进行了研究.

Selection of Frequency Signal Source for a Governor as Judged by Test Run of a Large Water Turbine

从葛洲坝1号机试运行情况谈水轮机调速器频率信号源的设计选择

We adopt a way of attribute selection based on word entropy, use vectors which are represented by word frequency, and deduce its corresponding Bayesian formula.

我们采用了基于词熵的特征项提取方法，并且使用特征项单词出现频率来表示向量，推导出相应的贝叶斯计算公式。

The results showed that parameters Index of Diversity(ⅰ), Variance of Phenotypic Frequency ( VPF), Variance of Phenotypic Value ( VPV) and Coefficient of Variation ( CV) are more effective on evaluating different methods for core collection selection among 8 studied parameters.

结果表明，在所选8个参数中，多样性指数、表型方差、表型频率方差及变异系数为对比不同核心种质取样方法间优劣的有效参数；

Optimization selection of power source frequency in high frequency induction brazing

高频感应钎焊中电源频率的优化选择

Selection of Test Point and Frequency in Multifrequency Fault Diagnosis

模拟电路多频故障诊断中测试点和频率的选择

On the type selection of library's hard disk array system This paper presents algorithm on time compression and bypass flow reduce frequency along with method of hard disk array storage.

提出时间压缩和分流降频算法以及硬盘阵列存储方法，并由此实现一种新颖的解决了跟踪雷达对跟踪波门内的雷达回波信号的高速大数据量信号实时采集和存储系统。

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。

Optimized HF Radar Work Frequency On-line Real-time Optimum selection of mixing frequency

高频雷达工作频率在线实时优化选择

Brief talk on application and selection of variable frequency speed regulation in petrochemical production unit

浅谈变频调速在石化生产装置中的应用与选择

furthermore, the transformation frequency was increased when selection pressure was removed in the stage of plantlet differentiation during the whole hygromycin selection period.

此外，在筛选时期适当加大筛选压力，分化时去掉筛选压力，壮苗时加适当的选择压力，可提高转化率。

Frequency Analysis and Selection of Penetrating Foliage UWB SAR

叶簇穿透超宽带SAR工作频率分析与选择