相似性

The resemblance of families such as the Verbenaceae and Labiate is the result of evolutionary convergence .

科的相似性，如马鞭草科与唇形科的相似性，是进化上的趋同造成的。

Quantifying similarity/difference between two objects plays an important role in many contexts The quality of the similarity/difference scores can be improved by considering the semantic information related to the features of objects A flexible semantic distance function called X Dist is proposed, which can utilize the semantic information to measure the difference between two objects based on a solution to the transportation problem from linear optimization With a ground distance function for single features being a metric, X Dist is also a metric This property is very useful for making searching efficient, but is not investigated in the previous research Moreover, the experimental results show X Dist can be as good as the previously studied similarity measures in nearest neighbor searching, discriminative power and computing speed

量化对象间相似性/差别的方法具有广泛的用途，利用相关的语义信息能够得到更好的量化结果提出了一个量化对象间语义差别的距离函数XDist，它基于线性优化中的运输问题模型和相关的语义信息量化两个对象之间的差别在量化特征的差别函数是度量的情况下，XDist是一个度量，在提高搜索的效率方面具有优势，弥补了以往研究的不足，而且实验初步表明，此函数在最近邻查询效果、差别分辨力和计算速度方面能与已有函数相媲美1 引言量化对象间相似性/差别的方法具有广泛的用途，例如数据挖掘中的聚类；信息检索中的相似文档查询；协同过滤中的相似用户查询；CBR中的相似案例查询集合是对象特征表示的常用结构，集合的元素是与对象特征相关的项，它们可以

The music in the library is first passed through the similarity algorithms, which can be determined through a number of processes (MARSYAS, AFX and the Last.fm and Echonest APIs).

库中的音乐先通过相似性算法匹配，这种相似性算法的基准点基于一系列的外部数据处理（MARSYAS， AFX和Last.fm以及Echonest的API）得出。

Concept semantic space and similarity measure based on it Concept semantic space and similarity measure based on it is proposed.

概念语义空间与相似性度量提出了概念语义空间的概念及其建立在该空间基础上的相似性度量。

And Medicago falcata is nearer. But the three species have wide genetic distance with Medicago lupulina and Medico go sphaerocarpos cv.'Orion'.

与黄花苜蓿的相似性次之，而这3个种与天蓝苜蓿和一年生苜蓿的相似性较小。

Dominant species in SB were much more in summer than those in autumn, whereas the dominant species in summer and autumn remained unchanged in OSB.

藻场内外，夏季的多样性指数都大于秋季；同一季节藻场内外的相似性很低，不同季节，藻场内的相似性同样很低。

The identities of the pGM-CSF coding sequence when compared to human, bovine, ovine and murine sequences were 82%, 85%,88% and 86%, respectively at the nucleotide level, and 72%, 73%, 73% and 57%, respectively at the amino acid level.

与人、牛、羊、小鼠的 GM-CSF 核苷酸序列的相似性分别为 82%、 85%、 88%和 86%，氨基酸序列相似性分别为 72%、 73%、 73%和 57%。

PCR-SSCP (single-strand conformation polymorphism) was used for studying the community changes of pronucleus microorganisms in various fermenting stages of Luzhou-flavor Daqu. The results showed:(1) The pronucleus microorganism's community was similar and also had the polymorphism in each simple of various fermentation stage;(2) Different microflora had complex ecology effects of coordination and the restriction;(3) The diversity indexes of different stage of Daqu microorganisms were around 1.69~2.01, and the composition of them was stable relatively;(4) The similarity indexes were 0.67~1.00, and much higher in the approaching stages.

采用PCR-SSCP技术对浓香型大曲发酵过程中原核微生物群落结构的变化情况进行了研究，结果表明：(1)发酵各时期曲样的群落结构相似，同时也具有多态性；(2)不同微生物群落具有协同和制约的复杂生态学效应；(3)各时期曲样微生物多样性指数均在1.69~2.01之间，群落结构相对较稳定；(4)各曲样微生物群落相似性位于0.67~1.00之间，邻近时期样品间的相似性程度较高。

The parameter of sphericity can be used to describe the similarity between centroblastic-centrocyte-centroblastic lymphoma cells and elips degree and regular form factor can describe the similarity between centroblastic-mantle-centroblastic lympoma cells.

圆球度可以用来描述中心母细胞--中心细胞--中心母细胞性淋巴瘤细胞之间的相似性；椭圆度、规化形状因子可以描述中心母细胞--套细胞--中心母细胞性淋巴瘤细胞之间的相似性。

Angular spectral is spectral value map formed by estimating semblable coefficients of fast and slow shear wave or the variation of amplitude ratio of fast and slow shear wave with times and angles at a specified space point based on semblable theory of fast and slow shear wave, the angle value of this space point at a given time can be got by picking the maximum of angular spectral; the study reveals that fast and slow shear wave with different polarization direction should be separated using different rotation formula, eight formulas of separating fast and slow shear wave using clockwise rotation and counterclockwise rotation have been derived, and gained energy assignment rule and phase coincidence rule, in real data estimation, the rotation formula used for separating fast and slow shear wave can be uniquely determined on the two discriminating rules. On the basis of semblable theory of fast and slow shear wave, the delay time corresponding to the maximum of semblable coefficients at a specified point in a given time window is the delay time of fast and slow shear wave, delay time section of fast and slow shear wave can be got by moving space point and smoothing time window. The vertical variation values of delay time of fast and slow shear wave reflect the effect degree of vertical fractured reservoir on fast and slow shear wave which is defined as anisotropic coefficient, and section map of anisotropic coefficient can be obtained.

角度谱就是利用快慢横波的相似性原理，在某一空间点求出快慢横波的相似系数或快慢横波的振幅比值随着时间和角度的变化而形成的谱值图，拾取其极大值就得到该空间点某一时间的角度值；在研究中发现分离不同偏振方向的快慢横波应该采用不同的旋转公式，推导出了利用顺时针旋转和逆时针旋转分离快慢横波的八个公式，并给出了能量分配准则和相位一致性准则两个判别准则，在实际计算中利用这两个判别准则能唯一地确定分离快慢横波的旋转公式；根据快慢横波的相似性原理，在某一给定点和给定时窗内最大相似系数对应的延迟时间就是快慢横波的延迟时间，随着空间点的移动和时窗的滑动就可以得到快慢横波延迟时间的剖面图；快慢横波延迟时间与慢横波传播时间的比值定义为裂缝密度，并求出了裂缝密度剖面图；快慢横波延迟时间纵向上的变化值的大小反映了纵向上裂隙层对快慢横波影响的大小，定义为各向异性系数，并求出了各向异性系数的剖面图。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。