结构单元

The trapezoid tridimensional structure caps are the key parts of Combined Trapezoid Spary Tray, which enlarge the area of gas-liquid mass transfer.

立体传质塔板以梯形立体结构的帽罩为单元，将气液两相流动和传质从塔板上延伸至大部分塔板空间。

Effects of steric hindrance and conformation on the properties of the polymer were investigated.

通过在聚合物中引入芴和联苯的结构以及在PPV单元上引入不同链长的侧基等研究了聚合物的几何构型以及位阻等因素对材料性质的影响。

Firstly, the inversion of the ground motion with the unknown parameters and limited measurements was studied by the substructural identification, and the least-square algorithm of unknown input was built. Secondly, based on the estimated input, structural parameter down to the element level was identified in time domain by extended Kalman filter algorithm. Several cases of a 6-story frame structure are numerically investigated.

首先，使用子结构识别技术，研究了未知参数、观测不完整条件下的地震动输入反演问题，建立了未知输入的最小二乘估计算法；其次，在估计地震动输入的基础上，使用广义Kalman滤波器方法，识别全部单元结构参数。

For example,α2-macroglobulin appears to have an alternative structure that consists of a tetrameric subunit linked via disulfide bridges.

例如，第二号甲型巨型球蛋白似乎拥有一个由双硫键所连结的四倍体次单元所组成的结构。

From solution polymerization, polymers are tokened using MALDI-TOF-MSand IR spectrum. The structure of polymers are confirmed and obtain 2-28 repeatunits of poly(p-aminobenzaldehyde). The tip of polymer molecule still have one-NH_2 and one -CHO. To a certainty condtion, this polymer can polymerization tocreat even more molecular weight.

对溶液聚合得到的聚合物进行了飞行时间质谱和红外光谱表征，确定了聚合物分子的结构，测得了聚对氨基苯甲醛的2-28个重复单元，且聚合物分子末端还保留有一个-NH_2和一个-CHO，在一定条件下可以进一步缩合生成更高分子量的聚合物。

Both iron atoms of the binuclear unit are bridged by one oxy atom and two acetate groups. Each iron atom is also bound to facially - coordinating tridentate IDB ligand with the aliphatic nitrogen donor situated trans to theμ- oxy atom. Each iron centers is in a distorted octahedral symmetry.

每个双核单元的两个铁原子均通过一个氧原子和两个醋酸根连接，每个铁原子同时还与位于桥氧原子对位的三齿配体IDB重脂肪链上氮原子相结合，每个铁中心为一变形八面体结构。

Deep well drillstring is scatter to umpty dimensional beam unit along axes. Lengthwise vibration equation of whole drillstring is found with three-dimensional dynamic finite element method. With this equation and improved Ritz Vectors, dynamic response analysis and calculation of drillstring is carried out, also, the method of vibration model splice is used.

将深井钻柱沿轴线离散为若干个空间直粱单元，用三维动力有限元法进行振动分析，得到整体钻柱结构的纵向振动方程，用改进的Ritz向量法及振型迭加法对钻柱进行动力响应分析和计算。

Chapter 3 presents the object-oriented knowledge model, gives the knowledge representation method which combing the object-oriented with generation rule; ascertains the relation between entities in knowledge base of assembly unit partition; expatiates the reasoning policy and conflict solution policy.Chapter 4 presents make two steps to finish the assembly unit partition, which are the main assembly unit partition and unassembled partition, interlude using knowledge.

第三章提出了面向对象的知识模型，结合飞机产品特点，提出了面向对象与产生式规则相结合的知识表示方法；以装配工艺快速设计支持系统的知识库结构为基础，明确了装配单元划分系统知识库中实体间联系；阐述了知识的正向推理策略及冲突消解策略。

The network seepage flow analysis method of rock masses is a numerical method compatible with Block Element Method on the basis of the assumption that the rock blocks are unpermeable while the discontinuities are permeable.

岩体网络渗流分析方法是在假定岩石块体不透水、岩体中渗流仅通过结构面进行的基础上建立起来的一种与块体单元法配套的岩体渗流数值模拟方法。

The influences of different meshing density on the precision of results are compared.

模拟了炸药爆炸对金属结构的破坏，以LS-DYNA为仿真平台，分析了所应用的材料模型，比较了不同单元网格密度对计算结果的影响。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失