结构工程

However,authors still do not find the relevant references on convergence and symmetric problems of the semi-analytical solution.Based on the semi-analytical solution for Hamilton canonical equation theory,the formulations of the clamp and simply supported and symmetric boundary conditions on the Hamiltonian element are derived by the variational principle.Several numerical examples show that with increase of meshes,the convergence rate of the semi-analytical solution is faster than the convergent rate of traditional finite element method based on displacement.

①在厚度上没有任何位移和应力模式的假设，由于传递矩阵方法的引入，从理论上讲，不受板壳厚度或层合板壳层数的限制；②采用弹性力学的Hamilton正则方程半解析法，可以克服边界的局部化效应[8]；③由于在平面内或圆柱壳的曲面内采用了有限元法，所以一般的板壳问题不受结构侧面边界条件的限制，在复杂工程板壳问题上具有广泛的应用领域。

In this paper two wholly aromatic copolyesters, LCP-111 and LCP-116, provided by Chenguang Institue of Chemical Technology, were blended with two types of high performence engineering plastic, poly and poly with cardo group respectively. Research work was done on the phase morphology, phase separation process, crystallization and melting behaviors and their influence on the properties of LCP/PEEK and LCP/PES-C blends.

本文使用国产的仿Xydar全芳共聚酯LCP分别与二种新型的高性能工程塑料聚醚醚酮和酚酞型聚芳醚砜共混，主要对LCP及其与PEEK，PES-C共混物的相态结构，相分离过程，结晶和熔融行为以及这些因素对性能的影响做了大量的基础研究工作，这些工作是实用改性的理论依据，并且是高聚物共混理论研究中的一个新领域。

Polyethersulfone with cardo was a developed engineering thermoplastic and membrane material with high glass transition temperature,PES-C ultrafiltration membranes were prepared by phase inversion method using dimethylacetamide as solvent and oxalic acid and polyethylene glycol as additives.The membrane morphology forming and evolution could be observed by the experimental system and method.The effect of additive and polymer concentration on cast solution and the gelation kinetics of polyethersulfone with cardo asymmetric membrane were studied.

采用耐高温工程塑料——含酚酞侧基的聚芳醚砜为膜材料，草酸和聚乙二醇为添加剂， N，N -二甲基乙酰胺为溶剂，并利用改进的凝胶动力学实验装置和方法，使之能真实地再现不同膜孔结构生长及发展演化的过程，借助相关软件对图像进行处理，考察了添加剂、聚合物浓度对铸膜液凝胶速度的影响，对酚酞基聚芳醚砜非对称膜的凝胶过程的动力学进行研究。

Objective:To study the effect of the centrifugal force on the constructing of tissue engineering nucleus pulposus.

目的：探讨离心应力对髓核细胞功能表达和组织工程髓核结构的影响？

During design of pile raft foundation, reacting force raft board bottom is very important,and it not only suffers the stiffness influence of upper structure,and the degree of solidifying that still suffers the constantly change of base soil along with the increase of time reaches and the influence that time efficiency of base stiffness.

桩 -筏基础设计时，筏板底部的地基反力的确定是十分关键的，它不仅受到上部结构的刚度影响，还受到地基土的固结度随着时间的增长而不断变化及地基刚度的时效性等的影响。设计时其计算模型的建立又和桩-筏的刚度有关。根据地基土在桩-筏基础的作用下的实际受力状况，结合工程实例，提出桩-筏基础设计时简化计算的 3种模型及 3种型使用时的注意事项

A higher moment method with the basis of Chebyshev polynomial ｛T_k｝ is presented,which is used in the reliability analysis of engineering structures.

1引言在工程结构的可靠性分析中，一次二阶矩法(包括中心点法、JC法、映射变换法和实用分析法)以及二次二阶矩法得到了广泛应用[1，2]。

Building works, use the file structure, the client painted checkerboard areas, such as a pawn.

建立工程，使用文档结构，在客户区画出棋盘，棋子等。

Tower cranes are used in this project, most working-jibs are reciprocal chiasma.

本工程结构施工期间共计采用塔机11台，大多数塔臂相互交叉。

Concrete structure with circular cross section,especially concrete column has wide application in engineering.

0引言圆形截面混凝土结构在工程中应用非常广泛，随着我国建筑技术的迅速发展，由于建筑造型的需要在多层及高层建筑中采用了越来越多的圆形截面柱。

Convex Al plates were also shocked with the confinement of plane glass,and the plane glass's confinement is still effective as long as the plate's circumflexion radius is greater than 400mm.

对于实际工程应用中有重大意义的非规则平面情形下的约束机制，实验表明，在曲率半径大于400mm时平面约束结构的作用依然有效。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。