查询词典 extraction

Feature extraction algorithm was presented for the recognition of traffic sign symbols under degradations.

bstract 为了识别退化的交通标志图像，提出了一种新的特征提取算法。

Methods The QRS complex was firstly detected by using continouse wavelet transform, then the feature sets were detected by different feature extraction technique. Using linear discriminants, 4 types of FCC beats based on MIT/BIH arrhythmia database were classified and the classification performance of the feature sets was evaluated.

首先采用连续小波变换对QRS复合波进行定位，然后采用不同的特征提取技术，提取一组特征矢量，送入线性判别式分类器进行训练，并对基于MIT/BIH数据库中的4类心搏进行分类，评价其分类性能。

Under the condition of constant temperature gradient of extraction fractionating column of said separation apparatus a linear pressure boosting mode is used, so that the petroleum heavy oil, in particular petroleum residual oil can be cut into ten-odd or more narrow distillations according to the molecular weights.

在分离装置萃取分馏柱恒定温度梯度下，采用线性升压方式，可以将石油重质油，特别是石油渣油大致按分子量的大小切割成十几个或甚至更多个窄馏分。具有分离效果好，过程简单，靠近生产实际的特点；对生产实际有指导作用。

The linear range of concentration in molecularly imprinted monolithic column extraction is from 0.03 to 0.5μg/mL, correlation coefficients are up to 0.995, detection limit are 0.6-3.1 ng/mL and enrichments is 12-65 fold.

以毛细管电泳技术探讨对羟基苯甲酸酯类的最佳条件能有效分离六种对羟基苯甲酸酯类，再加上分子印模整体管柱具有选择性与富集率，其线性浓度范围为0.03-0.5 μg/mL，线性相关系数皆有0.995以上，侦侧极限介於0.6-3.1 ng/mL之间，富集率为12-65倍。在市售化妆水的分析添加标准品高浓度(0.1μg/mL)和低浓度(0.03μg/mL)，回收率介於80-120%之间。

In order to determine the detection threshold in moving objects extraction, an adaptive detection threshold determination method based on the two-dimensional spatio-temporal entropic principle is proposed.

针对图像序列中运动检测门限的选取问题，提出一种基于二维时空熵准则自适应确定检测门限的新方法。

After twice dichloromethane liquid-liquid extraction, the extracts were cleaned with PRS column.

建立了液相色谱-串联质谱测定水产品中孔雀石绿及其代谢物残留的检测方法。

Extraction of polymyxin E by foam separation was studied.

重点研究了泡沫分离提取多粘菌素E的工艺。

RESULTS: The optimal strategy met the extraction conditions of permatron anodic current 0.7A , the ratio of liquid to solid 2000/15 and microwave assisted irradiation time 1.5A ....

结果 ：淫羊藿苷的最佳工艺条件是微波辅助辐射时间助提取时间 1 。5h ，液固比 2 0 0 0 / 1 5 ，磁控管阳极电流 0 。7A。

In the subsequent operation of the system will be extremely difficult extraction of hydrocarbons adhesion.

在随后再运转该系统时，将极难抽除粘着的碳氢化合物。

Experimental date of extraction in different packing fraction module were verified. The mathematic model established in this paper can predict shellside mass transfer in hollow fiber reflecting module precisely.

由不同装填系数膜器的萃取实验数据对模型进行了验证，结果表明，本文建立的数学模型能较好地预测折流膜器的壳程传质系数。

The Fourth of July is Independence Day.

七月四日是美国独立的日子。

You would accept rubles, would you?

你可以接受卢布不是吗？