几何截面

Secondly, the construction simulation were performed by the model in ANSYS. The effect were emphasized in the construction process, which induced by temperature, geometric nonlinearity, and boundary condition. The conclusions were given that the stress decreased thirty percent for temperature change 10℃, and decreased fifteen percent for considering the elasticity support.

基于单元生死法施工模拟原理，运用ANSYS有限元软件建立了体育馆屋盖模型，进行了施工过程数值模拟，重点探讨了温度效应、几何非线性及支承条件对结构受力性能的影响规律，同时指出支承柱临界截面的存在，温度效应和边界条件变化对网壳结构边桁架杆件受力影响最为显著，温度变化10℃影响达30%，考虑支承弹性的影响在15%以上。

We decompose curvature signal with wavelet at first and then extract itslow frequency coefficients as new smooth curvature signal, which is used to constructa G~2 continuous piecewise rational cubic Bezier curve with GHI method subsequently.

本文首先对估算得到的离散曲率进行小波分解，提取其低频部分作为新的曲率，然后利用几何Hermite插值方法，重建出光顺的截面线。

Based on a simple and applicable method for sensitivity analysis, the updating parameters were determined such as material, cross shape and size of the main loading rods in the rig derrick. The optimal updating function was established according to the residual differential value between testing modal parameter and theoretical modal parameter.

依据简单实用原理，利用灵敏度分析方法确定了井架结构主要承载杆件的材料、截面形状和几何尺寸为待修正参数；以试验模态参数和理论模态参数之间的残差最小值构建优化修正函数，利用一阶搜索优化算法对待修正参数进行了优化和状态评估。

The modeling theories on dynamics of flexible multibody system are reviewed.In chapter 2, the geometric nonlinear relationship between strain and displacement is utilized in describing the nonlinear displacement field. The FEM discrete model of the arbitrary flexible beam in non-inertial frame is derived by the Kane's method.

第二章从几何非线性应变-位移关系描述非线性变形场，使用有限元方法离散三维任意截面柔性梁，用Kane方法对离散的模型建立动力学方程，并通过算例验证了算法的正确性和可行性。

A sequence of 3D parallel cross-section data from the surface object can mainly be obtained with ease by means of data acquisition techniques.

在第六章中，提出了一种截面线数据的B样条曲面生成方法，以提取测量数据的几何信息。

The results indicate that the scondary stress on several links has reached the permissible value, and changes regularly following the change of geometric parameters. It should be considered in engineering design.The whole paper includes five chapters.

计算结果表明，对方钢管这种截面刚度较大的材料而言，某些杆件的次应力已达到相当大的数值，且随几何参数的改变，呈现一定的变化规律，在设计时应予以考虑。

Quantum chemistry method was used to calculate the geometry structure of heavy oil character molecule .

采用量子化学方法计算得到重油特征分子的几何结构，提出了用量子化学方法计算重油特征分子的最小横截面直径和描述分子尺寸的方法。

The stiffness matrix and geometric stiffness matrix of rectangular tube-in-tube element of which the cross-section has bisymmetric axes are developed.

导出了截面含双对称轴的矩形筒中筒单元刚度矩阵和单元几何刚度矩阵。

Newton's method; Riemannian manifold; Smale's point estimate theory; section of a vector bundle; geodesic; Lie group; one-parameter subgroup

基础科学，数学，几何、拓扑Newton法； Riemann流形； Smale点估计理论；向量丛的截面；测地线；李群；单参数子群

Based on the characteristics of this kind of buildings, the items of inspection consist of geometrical shape, sectional dimension, global construction, deflection, material behavior, welding quality, corrosion, and so on. By the inspection some problems in column, steel roof truss and filler wall were found. then, a design of reinforcement was made.

根据此类建筑的特点，对钢屋架进行了几何形式、截面尺寸、整体构造、挠度、材质、焊接质量、锈蚀等多方面的检测，发现了混凝土柱、钢屋架、填充墙各自存在的问题，并有针对性地进行了加固设计。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。