对称

A binary relation on a set that is reflexive and symmetric is called a compatible relation.

一个集合上的二元关系，如果它是自反的也是对称的，可称它为相容关系。

Their motion asymmetry supported the idea of close correlation between motion perception symmetry and binocularity.

三位双上旋肌麻痹，一位视神经重度发育不全，一位早产儿网膜症，两位合并水平及垂直斜视，一位角膜彼得氏异常和一位网膜先天缺损，他们自出生起就没有发育双眼视觉的机会，他们不对称的运动觉支持了运动觉对称性和双眼视觉之间相关性的理论。

The second part of this paper is theoretical analysis witch contained asymmetric information theories and the exertion of the bionomics theories in the tea production and export.

论文的第二章是理论分析，分析了信息不对称理论及其对我国茶叶出口的影响和生态学理论在我国茶叶生产和出口中的应用。

Concretely, starting from a short sequence primal masks possessing Hermite interpolation properties, a necessary and sufficient conditions such that primal masks satisfies the preassigned order of sum rules are established, then a dual masks with short support, symmetry and any preassigned order of sum rules is constructed, it follows that two multiscaling functions are obtained and then multiwavelets and dual multiwavelets are derived. From which, a general design framework is obtained for constructing biorthogonal multiwavelets system with multiplicity 2r associated with Hermite interpolation functions.

具体的，从具有Hermite插值性质的短序列尺度符号出发，首先建立它具有指定阶和规则的充要条件，然后构造出短支撑、对称的具有指定阶和规则的对偶尺度符号，从而得到一对对偶的尺度函数，再构造出相应的双正交多小波。

Synthesis of P,N Ligands Based on Biphenyl Backbones and Their Applications in Asymmetric 1, 4-conjugate Additions

论文标题：联苯型P，N配体的合成及其在不对称催化1，4-其轭加成反应中的应用

Biphenyl polyimides derived from asymmetric bis s have good solubilities and film formation.

6由不对称双氯单体合成的联苯型聚酰亚胺具有良好的溶解性和成膜性。

Furthermore, the selective reductions of 2,2'-dinitrobiphenyl have been detailedstudied in the synthesis of achiral biphenyl backbones.

运用不对称活化的策略，成功地在Cu催化Et_2Zn对链烯酮的1，4-共轭加成反应中获得了高对映体选择性的加成产物。

The harm of bipod distributings the left and right sides is symmetrical.

两脚的损害分布左右对称。

Because the change of grating period caused by the asymmetrical rotation of two beams is limited to 5×10-4 nm at a tunability of the Bragg wavelength of ~100 nm, the tilt of grating caused by the rotation of the biprism can be ignorable.

因为在~100 nm范围内两光束的非对称旋转对光栅周期的改变是5×10-4 nm，双棱镜引入的光栅的闪耀可忽略。

I pass my hands lovingly about the smooth skin of a silver birch, or the rough

我感到树叶的对称美，用手摸着白桦树光滑的树皮或是松树那粗糙的厚厚的树皮。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。