对称

Based upon the results of experiment and calculation of several representative unsymmetric composite laminates , the coupling characteristics of unsymmetric laminate was studied.

为了解决机翼的扭转发散、载荷重新分布及操纵反效和操纵效率等问题，基于非对称复合材料的各向异性及相对于普通复合材料更好的可设计性，以几种典型非对称复合材料层板的试验及计算为基础研究了非对称层合板的各种耦合特性，并进行了非对称复合材料机翼的设计，得到了满意的结果。

Fish-bellied cable truss of point supported glazing has been widely used for the characters of lightness and transparency. And commonly it is systematically supported, when additional support is added, the structure is turned from symmetrical support into unsymmetrical support, the mechanical performance will be changed greatly because of its weak ability to resist unsymmetrical deformation, and more discussion will be needed.

点支式玻璃幕墙鱼腹式索桁架结构由于其轻盈、通透的特点得到了广泛的应用，其一般都是对称支承布置，当结构由对称支承变为非对称支承时，由于其抵抗不对称变形的能力较弱，结构的力学性能会发生较大的改变，需要作进一步的探讨。

The plate has a symmetry line, which extends from a first edge (202) to a second edge (203) of the plate and in relation to which the plate's heat transfer portion, sealing portions and ports to be passed by each of said fluids are symmetrically arranged.

该板具有对称线，该对称线从板的第一边缘(202)延伸到其第二边缘(203)，流过上述流体中各个流体的板的传热部分、密封部分和口部分相对于该对称线是对称配置的。

The proposed method can work well under asymmetry element parmeters,and it is not necessary to consider the phase shift of ideal transformer or using multi-port net theory,which make the proposed method more applicable and simplify the calculat...

相分量算法不要求电力系统元件参数对称或循环对称、不利用多端口网络理论及理想变压器的移相，拓宽了故障计算的适用范围、简化了编程难度，并可推广到处理诸如线路换位不完全的参数不对称等其他电网不对称计算。

The proposed method can work well under asymmetry element parmeters, and it is not necessary to consider the phase shift of ideal transformer or using multi-port net theory, which make the proposed method more applicable and simplify the calculation program. The method is also capable of handling various unsymmetrical calcuations, such as the fault calcuation for power system without complete transposition.

相分量算法不要求电力系统元件参数对称或循环对称、不利用多端口网络理论及理想变压器的移相，拓宽了故障计算的适用范围、简化了编程难度，并可推广到处理诸如线路换位不完全的参数不对称等其他电网不对称计算。

Maternal hypertension, low pre-pregnancy weight, and primiparae were the risk factors for both symmetric and asymmetric SGA infants. Those effects except primiparae were considerably greater on asymmetric than symmetric SGA infants. Low parental height and previous LBW or PTD history were also significantly associated with the risk of symmetric SGA infants.

母亲高血压、低怀孕前体重、及初产妇皆是为对称及非对称生长迟滞儿的危险因子，除初产妇外对非对称生长迟滞儿有较大的影响，矮小母亲或父亲及以前有低出生体重或早产儿亦与对称生长迟滞儿有显著相关。

Under certain ratio of signal-to-noise and through the computer simulations and calculations, the performances in Mbius digital base band communication system of five often used modem function set, those are the even and odd symmetrical triangle wave, even and odd symmetrical square wave and saw-tooth wave and their inverse transforms, are simulated 10000 times, and the fluctuation ranges of the error rate P(subscript b are observed.

在一定信噪比的前提下，通过计算机仿真和编程计算，对Mbius数字基带通信系统中偶对称三角波、奇对称三角波、偶对称方波、奇对称方波和锯齿波这5种常用的调制解调函数族及其逆变换进行仿真1万次，观察错误概率P

Bius digital base band communication system of five often used modem function set, those are the even and odd symmetrical triangle wave, even and odd symmetrical square wave and saw-tooth wave and their inverse transforms, are simulated 10000 times, and the fluctuation ranges of the error rate P(subscript b are observed.

bius数字基带通信系统中偶对称三角波、奇对称三角波、偶对称方波、奇对称方波和锯齿波这5种常用的调制解调函数族及其逆变换进行仿真1万次，观察错误概率P

In consideration of the structural characteristics of a chessboard pattern that the pixels in the images are central symmetrical for the points of intersection and antisymmetric for the lines of intersection of every two adjoining square panes, the precise coordinates of feature points can be decided by calculating the symmetry index and antisymmetry index for every pixel.

该算法巧妙地利用棋盘格图像的像素点相对于方格交点对称、相对于方格交线反对称这一特点，计算交点附近区域每一像素点的对称度和反对称度，并以此为依据来判定特征点的准确位置。

Their ability to draw the picture accurately is impaired especially when the symmetrical axis is tilted. Parallelograms are easily mistaken for line-symmetry diagrams. Point-symmetry diagrams tend to prevent correct identification of line-symmetry diagrams.

学童在画线对称图形另一半的能力有待加强，尤其当对称轴是歪斜时会影响学童画图的准确性；平行四边形易被当成线对称图形，点对称图形也会干扰线对称图形的判定。

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。