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正特征
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  positive feature
     To categorize documents hierarchically according to their topics,the thought of Fisher linear discriminant is utilized to get positive feature words and negative feature words in each category, and the algorithm of a hierarchical document categorization is given based on Fisher linear discriminant (HDCF).
     将文档按照主题进行层次分类,利用Fisher线性判别式的思想来提取每一类的正特征词和负特征词,给出基于Fisher线性判别式的层次文档分类算法(HDCF)。
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  “正特征”译为未确定词的双语例句
     In this paper, we establish some positive fixed point theorems of cone expansion and compression with norm type for weakly inward set-contraction maps,and also, we get some positive eigenvector results for this map.
     本文建立了弱内向型集压缩映射的范数压缩与扩张型正不动点定理,并获得关于正特征元的一些结果.
短句来源
     Under the assumptions that the positive eigenvalues are weakly linearly degenerate,and that the right hand side of the equations meets matching conditions,the global existence and uniqueness of C1 solution with small and decaying data are obtained.
     假设正特征弱线性退化,方程右端项满足匹配条件,可以得到慢衰减小初值问题C1解的整体存在性和唯一性.
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  相似匹配句对
     Characterization Theorems for Copositive Approximations
     共逼近的特征定理
短句来源
     THE SEMIGROUP CHARACTERIZA CTIONS OF POSITIVE IMPLECATIVE BCK—ALGEBRAS
     蕴含BCK—代数的半群特征
短句来源
     Characteristics of Fault
     错误的特征
短句来源
     (2)essential features;
     基本特征;
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  positive feature
For example, it may have positive feature in one instance and monotone in the other.
      
Agreement of the positive feature frequencies of the two methods were compared.
      
On the other hand, Gram- positive bacteria lack LPS, a positive feature which justifies intensive investigation into their production of PHAs.
      
A separate positive feature of FB boilers is the considerable decrease of the CO2 amount emitted into the air.
      
A document in U that does not have any positive feature in PF is regarded as a strong negative document.
      
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The atmospheric turbulence is highly non-uniform and intermittent. The characteristics of chaos, are that positive characteristic exponents and fractional dimension can quantitatively express the turbulent intermittency.The variation of Lyapunov exponents with parameters can quantify the development of the state of nonlinear system. The value of fractional dimension D indicates the degree of intermittency and the smaller the value of D, the stronger the turbulent intermittency.The structure function law and...

The atmospheric turbulence is highly non-uniform and intermittent. The characteristics of chaos, are that positive characteristic exponents and fractional dimension can quantitatively express the turbulent intermittency.The variation of Lyapunov exponents with parameters can quantify the development of the state of nonlinear system. The value of fractional dimension D indicates the degree of intermittency and the smaller the value of D, the stronger the turbulent intermittency.The structure function law and the energe spectrum law in homogeneous trubulence should be modified owing to the intermittency. The intermittency also has powerful effects on the relative diffusion.

大气湍流是间歇性的,具有浑沌的特征.正的特征指数和分数维可以定量表征湍流的间歇性. Lyapunov特征指数随参数的变化可以定量表征非线性系统状态的演变.分数维D的大小可以表征间歇性,D愈小,湍流的间歇性愈强. 由于间歇性,均匀湍流的结构函数定律、能谱定律等均要订正.对相对扩散,间歇性的影响很大.

In this paper,the author introduces some applications of nonneg- ative matrix in input-output analysis.He proves concisely both the equivalent conditions for the effectiveness of Leontief model and the optimum for the positive characteristic vector method;and,by use of the depression of order, gives the formula for characterisitic polynomial of cyclic matrix.By means of this formula,the distribution of characteristic value of cyclic matrix can be determined.

本文介绍非负阵在投入产出分析中的若干应用,给出了关于 Leontief 模型有效性等价条件和正特征矢量法最佳性的简洁证明.用降阶法得到了循环阵的特征多项式的简洁公式,并藉此给出了其特征值分布.

Using Newton's method,we study the algorithm for computing the maximum eigenvalue and the corresponding positive eigenvectors of nonnegative irreducible matrices.Some improvement is made on the method due to Alfred Brauer for computing the maximum eigenvalue of irreducible nonnegative matrices.

本文研究了应用Newton法计算非负不可约距阵的最大特征值及相应正特征向量的算法,并对Alfred Brauer提出的计算不可约非负矩阵最大特征值的方法作了改进.

 
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