环状

Based on optimization theories of genetic algorithms and the linear programming, a series of optimal desig...

提出了环状管网优化设计的遗传—线性规划算法，将遗传算法和线性规划有机的结合在一起，是一种有效地解决环状管网优化设计问题的新。。。

The maldevelopment or breakage in the alar cartilaginous rings is the important anatomic foundation for the formation of congenital deformity of nose.

鼻翼软骨环状结构发育不良或断裂是形成先天性鼻畸形的重要解剖学基础，重建鼻翼软骨环状结构是确保手术疗效的关键。

According to the different orientations of domain walls with respect to the (100) observation plane of a foil, 90°domain boundaries may be divided into two kinds. one is thin lens or ring shaped a-a 90°domain boundary, and the domain wall lies on the {110} plane; Usually, most of these domain boundaries are uncharged; according to the extinction rules for the (011) domain walls, the displacement vector 〓 along 〓 can be dertermined, which is parallel to the line of intersection between the domain wall and the plane consisting of spontaneous polarization vectors on both sides of domain boundary; from selected area electon diffraction of crystals including domain boundary, we not only examine slight difference in the crystal parts on both sides of the domain boundary, but also obtain crystallographic relationship between them, that is, there exists a 180°rotation symmetry operator along a normal of domain wall. The other is Z or ring shaped a-c 90°domain boundary along {010} direction, and the displacement vector 〓 runs along 〓 direction.

根据界面相对于样品中(100)观测面取向的不同，90°畴可分为两类：一类为薄透镜片状或环状的a-a90°畴，其界面平行于{110}，多数不带电，由消光规律可确定其位移矢量平行于畴界面与自发极化所在平面的交迹，即，〓方向，而从包含畴界的选区电子衍射图可知，这种不带电的90°畴界两侧存在微小的取向差，其界面两侧的结晶学关系为以界面法线为二次轴的旋转关系；另一类为Z状或环状的a-c90°畴，其界面平行于[010]或[001]，相应的位移矢量为〓方向。

Annular thickening Rings of thickening laid down on the inner wall of protoxylem vessels and tracheids.

环状加厚：原生木质部导管和管胞的内层环状増厚。

Be engaged in clinical over 20 years, and being good at disposing common ailment and severe cases in anorectum section, masculine branch and urinary surgery , especially in operation on internal pile, external pile, combined hemorrhoid, anal fissure, colorectal Polyp, pruritus ani, rectocele, prolapse of ring-like hemorrhoids .

从事临床工作二十余年，能娴熟处理泌尿外科、男性科、肛肠外科各种常见病及疑难杂症，尤其擅长诊治内痔、外痔、混合痔、肛裂、直肠息肉、肛门瘙痒、脱肛、混合痔环状脱出及内痔环状脱出，备受患者好评。

A series of counting formulas for circle simple arc two bounds combination and circle double arc two bounds combination were obtained.

提出了有关环状单弧限距组合及环状双弧限距组合的一系列计数公式。

The height of central part of the round cambered surface is equal or higher than the one of ring- shaped bulge. When the horizontal top side of internal cavity of encapsulation mold is pressed down to the heat sink so as to produce a deformation, the cambered surface can not be pressed to oppress the subjacent metal line, and the ring-shaped bulge can also prevent mold-overflow.

该散热片，适用于封装制程，具有一圆形弧面板部，并且其圆形弧面板部的中央是高于或等于环状凸起的高度；如此一来，当封胶模具内模穴的水平顶面下压至散热片上而使其产生变形时，圆形弧面板部就不会压迫到下方的金属线，而环状凸起同样也可发挥防止溢胶的功能。

Typical CT imaging of BM was characterized with:(1) annular enhancement or annular and tubercular combined enhancement;(2) huge size of hydrops surrounding the metastasis,...

典型的CT表现有：(1)环状强化或环状和结节状混合强化为绝大多数；(2)周围大范围水肿，与病灶大小不成比例；(3)颅内多发为常见。

AFM imaging has confirmed the cyclic topology, revealing uniform cyclic features with no detectable linear polymer contaminants.

AFM 影像证实了其环状拓扑结构，表明了其具有统一的环状结构特征并且没有可检测的线性聚合物共污染物。

Via comprehensive computations, the possibilities of vinylidene and allene intermediates were excluded, and the reaction mechanism was found to contain the following three steps:(1) gold-catalyzed cyclization to give the cyclic intermediate,(2) the cyclic intermediate undergoing a 1,3-H migration to give a more stable intermediate, with the assistance of water-cluster,(3) finially, the 1,2-H or 1,2-silyl migration occuring for generation of the observed product.

通过对各种可能的反应路径的进行计算和比较，排除了亚甲基卡宾和连二烯中间体的可能性，并确定该异构化反应机理包含以下三个步骤：（1）炔丙基吡啶反应在金催化条件下发生分子内的成环得到环状中间体；（2）环状中间体在水分子簇的协助下优先发生1，3-氢迁移反应，异构化得到更为稳定的中间体；（3）最后再进行1，2-氢迁移或是1，2-硅烷基团迁移即得到实验中所观察到的环异构化产物。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。