几何基础

The mechanical behaviour of the bridge with and without middle diaphragm s in the loading-failure process is investigated in great detail.

以虚拟层合单元程序为基础，综合考虑结构的几何非线性和材料非线性，对一典型5跨简支连续小箱梁桥结构的极限承载力进行了分析，重点考察了在有、无跨中横隔梁时，结构从加载到破坏的全过程中受力性能的变化。

Based on the pre-existing structures of"two anticlines with one fault", the author systematically studies the forming mechanisms of eastern Sichuan high and steep structural belt in Himalayan episode.

在&两背一断&先存构造基础上，系统研究了喜山期川东高陡构造带的形成机制，据此，将川东高陡构造带的几何地质模型概括为4种，演化地质模型概括为7种。

According to the geometries of the conformers and the statistical weight parameters, we can construct six-state statistical weight matrices.

在此基础上，应用计算得到的模型分子的几何构型与统计权重参数，分别构建针对－CH2-和－CCl2-中心的聚偏二氯乙烯的6态旋转异构态模型。

Start out learning the 3 basic crochet stitches and quickly move on to making geometric forms, lace patterns, edgings, and seams. By the time you've worked your way though the large selection of stitches and weaves, you'll have mastered over 50 fundamental techniques.

一开始学习3个基本学习钩针编织的技巧后，紧接著学习几何形式，花边图案，边角料和接缝，在本书结束后，你已经可以掌握50个以上的基础针织技巧来发展独创属於你自己特有风格的针织品。

In this paper, the geometry modeling technology and the theory and methods of the freeform curve and surface, together with the applied, opening and mini-sculpting system software for moulding empoldered for the HeNan JiuDing stock company have been analyzed and researched systematically in the course of mutual curve-surface sculpting.

论文在对几何造型技术及曲线、曲面的理论和方法进行系统分析与研究的基础上，应河南九鼎股份公司的实际要求，开发了一套实用的、开放性和小型注塑模具造型系统软件。

Based on inclusion exclusion principle of set theory,a new algorithm to calculate the whole projective area was put forward to those overlapped complex geometrical objects in any direction.

在此基础上，根据集合论中的包含互斥理论，提出了一种求取多个复杂几何形体在任意方向的投影面积的新算法。

A new method was developed for design of the composite material flywheel with high speed. In this paper ,the method of optimization of shape design for the composite material flywheel with high speed was put forward on the base of the analytical method and research optimization of shape design, and established the models of density optimization of energy and light mass.These models were used to design two typical composite flywheels with high speed in hybrid electrical vehicle flywheel battery and the stress level and convergence on the flywheel were got .Then a new way was developed for optimization of shape design of the composite material flywheel with high speed.

在此基础上对高速复合材料飞轮进行了形状优化设计，将复合材料有限元分析方法和优化设计技术相结合，提出了复合材料的形状优化的方法，分别建立了以高速复合材料飞轮的以储能密度最大为目标函数的形状优化模型和以质量最轻为设计目标的形状优化模型，并以混合动力客车飞轮电池中高速复合材料飞轮作为具体应用，使其在满足强度条件和几何约束条件下，分别寻求其最大储能密度和最轻质量，从而为高速复合材料飞轮的形状优化设计提供参考依据。

Dynamics model of four-foot robotThe dynamics model of four-foot robot has been analyzed in detail with geometry and inertia parameter of pole.

利用杆件的具体几何和惯性参数对四足机器人的动力学运动方程做了详细分析，为今后的动力学研究奠定了基础。

The results of this paper implies that these subdivision schemes can be used in solving some geometric constraint problems, and some further mathematical fundaments are proposed in the end of the paper.

本文的结果说明了文中所涉及的细分格式可用来解决具有一些几何约束的设计问题，并提出了进一步的相应数学基础研究的问题。

Influence of limestone powder admixture on working performance of concrete;2. Non-linear analysis of coordinated working performance between infilled wall and steel frame;3. Based on large quantity experiment data,the working performance criteria Lz of self-rotating spring is generalized which is believed to be valuable to .

换热管内插自旋弹簧的几何参数对其强化传热和自动除垢效果有重要的影响，通过对多组试验结果的比较分析，得出了无量纲参数D1/S、D1/D0对换热管内自旋弹簧的转动特性和流体阻力特性的影响规律，并在大量试验数据的基础上归纳出一个换热管内自旋弹簧工作性能的综合评判准则——L z准数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。