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expression variation
相关语句
  表情变化
     Recently, most researches concerning face recognition are based on 2D face images, but because of the influence of illumination, pose and expression variation, the improvement of recognition rate of 2D face recognition is greatly impeded.
     目前的人脸识别方法主要集中在二维图像方面,但由于受到光照、姿势、表情变化等因素的影响,其识别的准确度受到很大的限制。
短句来源
     The wavelet transformation not only diminishes the expression variation also reduces the image size in the low frequency subband image,and the classification quality of the image frequency spectrum feature is very good,so the spectrum face acquired by combining the wavelet and frequency spectrum has great merit in face recognition.
     小波变换后的低频子带图像既去除了某些表情变化,又减小了数据量,而图像的频谱特征则具有良好分类特性,因此两者结合后得到的频谱脸在人脸识别方面具有相当高的应用价值。
短句来源
  “expression variation”译为未确定词的双语例句
     Methods: The models of femoral fracture healing of Wistar rat were established, and then the expression, variation and distribution of BMP-2 and VEGF in different healing stages of fracture (day 1, 3, 7, 14, 21,28, 42) were detected using immunohistochemical observation and histological observation.
     方法:以Wistar大鼠为研究对象,制作股骨骨折愈合模型,采用免疫组织化学和HE染色的方法,检测骨折不同阶段(1,3,7,14,21,28,42d)BMP-2、VEGF的表达、变化和分布。
短句来源
     Gene expression variation of small intestine UGT1A6 of rat related propofol metabolism in anhepatic phase
     无肝期大鼠小肠异丙酚代谢相关UGT1A6的基因表达变化
短句来源
     Study of gene expression variation of rat kidney ugt1a6 related to propofol metabolism in anhepatic phase
     大鼠肾脏异丙酚代谢相关ugt1a6基因在无肝期表达变化的研究
短句来源
     Methods The intracerebral hemorrhage (ICH) animal models were established by microinjecting 0.4 U Ⅶ collagenase into the globus pallidus. We observed the expression variation of BDNF at 2 h, 6 h, 12 h, 1 d, 4 d and 7 d after cerebral hemorrhage by immunohistochemistry, and positive cell counting served as the observation index.
     方法 :通过微量注射器向苍白球内注入Ⅶ型胶原酶 0 .4U建立脑出血模型 ,用免疫组织化学法观察脑出血后 2h ,6h ,12h ,1d ,4d ,7d ,6个时间点BDNF的表达变化 ,以阳性细胞计数作为观察指标。
短句来源
     Methods: Using immunohistochemistry、reverse transcriptase-polymerase chain reaction (RT-PCR) and single strand conformation polymorphism (SSCP), the expression variation and gene mutation of nm23-H1 gene were detected in 30 NPC tissues and in 11 nasopharyngeal tissue of chronic pharyngitis.
     方法:应用免疫组织化学法、荧光实时定量RT-PCR及单链构象多态性分析技术,对30例鼻咽癌组织、11例慢性咽炎鼻咽组织中nm23-H1基因的表达情况及基因突变情况进行检测和分析。
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  相似匹配句对
     Metaphor is the variation in the expression of meanings.
     隐喻是怠义表达的变体。
短句来源
     THE VARIATION AND ITS SIGNIFICANCE OF THE VEGF EXPRESSION IN THE BRAINS OF SHRs
     SHR大鼠血压升高前后脑内VEGF的变化及其意义
短句来源
     The material expression
     材料的表情
短句来源
     On "Expression of the Abstract
     论“抽象的抒情”
短句来源
     On Translation and Variation
     试论翻译与变
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  expression variation
The diversity inherent in every organ has its roots in gene-expression variation and is revealed through distinctions in the molecular profile and hence the identity of individual cell type.
      
Various factors are thought to contribute to transgene expression variation including the transgene copy number, RNA silencing, transgene insertion site and the employment of certain regulatory sequences to drive transgene expression.
      
Gene expression variation in grapevine species Vitis vinifera L.
      
In this review we discuss issues relating to the biological information one obtains from such studies and the biological significance and use of signals from mapping of gene expression variation.
      
Gene expression variation has been the focus of many studies in the past few years.
      
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This paper derives the functional expression variation of kinetic parameter “ρ” with tip ang1e of swashplate in tipping piston pump. It is simpler,accurate to de-sign and calculate on tipping piston pump with the function than with convertional func-tion, ρ=f(α).

本文推导了倾斜柱塞泵运行参数ρ随科盘倾角Φ变化的函数关系式,用此函数关系进行倾斜柱塞系的设计计算,比用传统的函数ρ=f(α)要简单,且比较精确。

Objective To investigate the expression variations of IL 1 beta and TNF alpha in human spermatozoa. Methods IL 1β and TNF α mRNA expressions were studied by means of reverse transcription polymerase reaction (RT PCR)in 13 fertile men,in 30 infertiles and in 30 chronic prostatitis patients. Results The expressions of IL 1β and TNF α mRNA in infertile men were significantly lower than those in fertile men( P =0.018 and P =0.050),and the expressions TNF α mRNA in chronic...

Objective To investigate the expression variations of IL 1 beta and TNF alpha in human spermatozoa. Methods IL 1β and TNF α mRNA expressions were studied by means of reverse transcription polymerase reaction (RT PCR)in 13 fertile men,in 30 infertiles and in 30 chronic prostatitis patients. Results The expressions of IL 1β and TNF α mRNA in infertile men were significantly lower than those in fertile men( P =0.018 and P =0.050),and the expressions TNF α mRNA in chronic prostatitis patients were significantly lower than those in fertile men( P =0.018 ),but the expressions of IL 1β in these patients were not significantly lower than in fertile men( P =0.420). The expression differences of IL 1β and TNF α mRNA between the infertile men and chronic prostatitis patients were not significantly( P =0.488 and P =0.616). Conclusions Some unknown factors might impair the production of IL 1β and TNF α in infertile spermatozoa, and that may be responsible for the poor quality of semen and the infertile status in these patients. Furthermore, urogenital inflammation could also disturb the expression of TNF α in human spermatozoa.

目的 了解IL 1β和TNF α在人精子表达的变化及意义。  方法 应用逆转录聚合酶链式反应 (RT PCR)检测 13例正常生育者、30例不育者及 30例慢性前列腺炎患者精子IL 1β和TNF αmRNA表达。 结果 不育者精子中IL 1β和TNF αmRNA表达均显著低于正常生育者 (P=0 .0 18和P =0 .0 46 )。慢性前列腺炎患者精子中TNF αmRNA的表达显著低于正常生育者 (P =0 .0 18) ,而IL 1βmRNA表达与正常生育者相比差别无显著性意义 (P =0 .42 )。IL 1β和TNF αmR NA在不育者与慢性前列腺炎患者精子中的表达差别无显著性意义 (P =0 .49和P =0 .6 2 )。 结论 某些因素可能干扰不育症患者精子IL 1β和TNF α的合成 ,导致精液质量下降及不育。生殖道炎症也可能影响精子TNF α表达 ,其机制和意义有待进一步研究证实

The difficulty of a face recognition problem is to handle different types of variations, such as facial expression, illumination and pose. In order to improve the robustness of face recognition with respect to facial expression, this paper proposes a new approach, the eigenmotion based method, which is tolerant to large variations of facial expressions. In this new approach, first motion vectors are computed between a testing face image and a neutral training image using the block...

The difficulty of a face recognition problem is to handle different types of variations, such as facial expression, illumination and pose. In order to improve the robustness of face recognition with respect to facial expression, this paper proposes a new approach, the eigenmotion based method, which is tolerant to large variations of facial expressions. In this new approach, first motion vectors are computed between a testing face image and a neutral training image using the block matching method, then projected to a low dimensional subspace that is pre trained by applying principal component analysis(PCA) to motion vectors resulting from training images with expression variations. This subspace is called an eigenmotion space. Finally the identification of the testing image is determined based on its residue to the eigenmotion space. Both the individual modeling method and the common modeling method are described in this paper. Experimental results show that the proposed eigenmotion based method outperforms the eigenface approach in the presence of facial expression variations. The approach can be extended to model other types of variations as well, for example, illumination and pose variations.

人脸像的面部表情识别一直是人脸识别的一个难点 .为了提高表情人脸识别的鲁棒性 ,提出了一种基于特征运动的人脸识别方法 .该方法首先利用块匹配的方法来确定表情人脸和无表情人脸之间的运动向量 ,然后利用主成分分析方法 (PCA)从这些运动向量中 ,产生低维子空间 ,称之为特征运动空间 .测试时 ,先将测试人脸与无表情人脸之间的运动向量投影到特征运动空间 ,再根据这个运动向量在特征运动空间里的残差进行人脸识别 .同时还介绍了基于特征运动的个人模型方法和公共模型方法 ,实验结果证明 ,该新算法在表情人脸的识别上 ,优于特征脸方法 ,有非常高的识别率

 
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