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比较特征
相关语句
  comparative features
    Based on analyzing the structure characteristic of hand-drawn electronic component symbols,an expandable meshing construction method is given,and the comparative features based on expandable meshing are defined.
    在分析了以智能像卡输入的手绘电气符号的结构特点的基础上,给出了扩展网格构造方法,定义了扩展网格的比较特征,将其应用于手绘电气符号的特征提取。
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  “比较特征”译为未确定词的双语例句
    Eigenfaces combining linear discriminant analysis method is taken as the best by comparing different methods,considering synthetically verification rate and feature extraction time.
    横向比较特征提取方法,综合考虑认证率和特征提取时间两方面因素,该文认为特征脸结合线性判别分析方法是研究的4种特征提取方法中最优的方法。
短句来源
    According to the characteristic of handwritten electronic component symbols, both comparative feature based on expandable meshing and primitive shape distribution feature based on expandable meshing are presented, whose application value are analyzed thought recognition experiment.
    根据手绘电气符号的特点,有针对性的提出了两种特征提取方法:扩展网格比较特征提取方法和扩展网格图素分布特征提取方法,并通过识别实验对这两种特征的应用价值进行了分析。
短句来源
    integrated technique of mutilclassifier is analyzed, and a model of symbol recognition with two class classifier is proposed in which input feature data is comparative feature based on expandable meshing with distance classifier at first class and input feature data is primitive shape distribution feature based on expandable meshing with BP neural network classifier at second class.
    通过对多级分类器集成技术的分析,提出了一种二级分类器组合的手绘电气符号识别模型,预分类时,输入特征数据是扩展网格比较特征,分类器是距离分类器; 细分类时,输入特征数据是扩展网格图素分布特征,分类器是BP神经网络分类器。
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  comparative features
The comparative features and operation of the three improved energy recovery snubbers are discussed and supported by PSPICE simulations and experimental results.
      
Comparative Features, Functions and Longevities of Implantable Cardioverter-Defibrillators
      
Comparative Features, Functions and Longevities of Implantable Cardioverter Defibrillators
      
Comparative features of hepatitis C virus infection in humans and chimpanzees
      
Using simultaneous long-term observations of ionospheric scintillation at equator and anomaly crest region in the same longitude (Indian) zone comparative features of scintillation occurrence are brought out.
      
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  compared feature
We identified the URLs in the baseline that persisted from previous crawls and compared feature distributions.
      


Text categorization (TC) is an important research direction in Text Mining. It aims to assign one or more predefined category label(s) for a text document, and provides efficient methods for documents management and information searching. A major problem in automatic text categorization is how to select the best feature subset from the original high feature space in order to make the categorization algorithm work efficiently and improve the precision. In this paper, the methods of feature selection and weight...

Text categorization (TC) is an important research direction in Text Mining. It aims to assign one or more predefined category label(s) for a text document, and provides efficient methods for documents management and information searching. A major problem in automatic text categorization is how to select the best feature subset from the original high feature space in order to make the categorization algorithm work efficiently and improve the precision. In this paper, the methods of feature selection and weight adjustment techniques are discussed and analyzed, and their influence on text classification precision and efficiency is pointed out. Furthermore, the TEF-WA (term evaluation function-weight adjustment) is introduced. We introduce a new weight function, which includes feature weight evaluation function and adjusts the effect of the feature term in the classifier according to the feature term's strength. To evaluate the TEF-WA method, experiments are carried by using several different scale training document collection, various term evaluation functions such as document frequency, information gain, expected cross entropy, CHI, the weight of evidence for text, term frequency formula or document frequency formula. The experiment results have proved that the TEF-WA technique is efficient in promoting the classification precision and reducing the compute complexity.

文本自动分类面临的难题之一是如何从高维的特征空间中选取对文本分类有效的特征,以适应文本分类算法并提高分类精度.针对这一问题,在分析比较特征选择和权值调整对文本分类精度和效率的影响后,提出了一种结合评估函数的TEF-WA权重调整技术,设计了一种新的权重函数,将特征评估函数蕴含到权值函数,按照特征对文本分类的辨别能力调整其在分类器中的贡献.实验结果证明了TEF-WA权值调整技术在提高分类精度和降低算法的时间复杂度方面都是有效的.

Eigenfaces combining linear discriminant analysis method is taken as the best by comparing different methods,considering synthetically verification rate and feature extraction time.Through study of projection space dimensions,it is indicated that the best projection dimension is connected with the similarity between images of one kind of the data base,with the number of samples of one kind.But their relation is qualitative,not quantitative.Studying of similarity match methods,it shows that cosine distance is...

Eigenfaces combining linear discriminant analysis method is taken as the best by comparing different methods,considering synthetically verification rate and feature extraction time.Through study of projection space dimensions,it is indicated that the best projection dimension is connected with the similarity between images of one kind of the data base,with the number of samples of one kind.But their relation is qualitative,not quantitative.Studying of similarity match methods,it shows that cosine distance is best for classification.

横向比较特征提取方法,综合考虑认证率和特征提取时间两方面因素,该文认为特征脸结合线性判别分析方法是研究的4种特征提取方法中最优的方法。通过对投影空间维数的研究,最佳投影空间维数同数据库本身类内图像的相似程度和每一类的样本数目同方向增长,它们之间存在定性关系而非定量关系。相似度匹配方法的研究结果表明余弦距离分类器分类效果最佳。

A new feature extraction method for off-line hand-drawn electronic component symbols inputted in special way is presented.Both a new writing carrier and a sampling equipment are used.Based on analyzing the structure characteristic of hand-drawn electronic component symbols,an expandable meshing construction method is given,and the comparative features based on expandable meshing are defined.This feature extraction method possesses adaptability of variations of strokes in different handwritings.Experiment of...

A new feature extraction method for off-line hand-drawn electronic component symbols inputted in special way is presented.Both a new writing carrier and a sampling equipment are used.Based on analyzing the structure characteristic of hand-drawn electronic component symbols,an expandable meshing construction method is given,and the comparative features based on expandable meshing are defined.This feature extraction method possesses adaptability of variations of strokes in different handwritings.Experiment of recognition shows that the proposed approach is both effective and efficient.

提出了一种特定输入方式下脱机手绘电气符号的特征提取方法。采用一种新的书写载体和图像采样装置。在分析了以智能像卡输入的手绘电气符号的结构特点的基础上,给出了扩展网格构造方法,定义了扩展网格的比较特征,将其应用于手绘电气符号的特征提取。所提取的特征具备对不同书写笔画不规则变形的适应能力,有效地反映了手绘电气符号的局部和全局特征。识别实验表明,该特征提取方法是有效的。

 
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