查询词典 descriptive geometry

Differential Geometry of Curves and Surfaces: A Concise Guide presents traditional material in this field along with important ideas of Riemannian geometry.

曲线和表面的不同几何学：一本简明的指南跟Riemannian 几何学的重要的想法一起在这个领域提出传统的材料。

This paper proves the existence of utility function by using Riemannian geometry methods, which build a bridge between Riemannian geometry and economics.

运用黎曼几何的方法证明了效用函数的存在性，引进了广义的边际效用趋势概念，该定义揭示了以效用函数为度量与一般的欧氏度量的偏离，并证明了这个定义是内蕴的。

Through simulation of the real process of thomcolumbar burst fracture and use of modem dynamics techniques, the present study was (1) to investigate the kinetic relationship between structural damage and impact energy absorption and dynamics mechanism of thoracolumbar burst fracture by quantitative analysis of various injured segments;(2) to explore the instability mechanism of L1 vertebral burst fracture and its injury threshold by three-dimensional analysis of the injured segment with stereophotogrammetry in combination of transient physical parameters, anatomy and image;(3) to explore the corresponding relationships between impact energy, geometry parameters and biomechanics by geometry and biomechanical analysis of thoracolumbar burst fracture, which may provide an objective standard for evaluation of spinal injury severity and experimental evidence for adoption of biomechanical treatment in clinic;(4) to evaluate the fixation effect of different instruments and the effect of intervertebral bone graft on segment fixation by analysis of the threedimensional stability of different internal fixation instruments and their decompression of the spinal canal, which may provide experimental evidence for therapeutical selection for thoracolumbar burst fracture in future; and finally to investigate the effect of various instrument fixation on dynamical characteristics by comparison and quantitative analysis of frequency and amplitude responses, which may provide certain theories and experimental evidence for application of vibration test to judge the stability of the spine.

本研究从胸腰段脊柱爆裂骨折发生的实际过程出发，以现代动力学检测及计算机多通道高性能数据采集分析系统等高新技术为基础，实时量化分析损伤节段的工程参数，揭示了结构破坏与能量吸收的变化规律，探讨了胸腰段脊柱爆裂骨折的瞬态损伤机制；利用三维立体摄像技术，对不同损伤程度的节段进行三维运动分析，结合瞬态物理参数、影像学和病理解剖，明确了〓椎体爆裂骨折的失稳机制及损伤阈值；通过对胸腰椎爆裂骨折的几何学变化及生物力学分析，明确了撞击能量与几何参数、几何参数与生物力学的相应关系，为评判脊柱损伤程度提供了客观标准，为治疗中采取适宜的生物力学方法提供了实验依据；通过对比分析不同内固定器械的三维稳定性和对椎管的减压作用，评价不同器械的复位固定作用，同时比较椎体间植骨对节段固定作用的影响，为今后临床胸腰段脊柱爆裂骨折的治疗选择提供依据；利用振动测试与分析技术，比较及量化分析了不同致伤状况的频幅响应特征，比较分析了各种器械固定对动力学特性的影响，为今后临床建立基于振动测试与分析技术判断脊柱稳定性的诊断方法，提供了一定的理论和实验依据。

For thecopper and silver complexes, tripodal ligands exhibit rich coordination forms, andthe coppers exhibit different geometry such as square-plan, square pyramidal, andtrigonal bipyramidally geometry.

在铜、银配合物中，三脚架配体表现出多种配位方式，铜离子有平面四边形、四方锥、三角双锥等不同的空间构型。

The relation and difference between assembled geometry and unstrained geometry are discussed.

论述了安装构形与预制构形的联系与区别。

Assembled geometry and unstrained geometry of segmental bridge provide important information for fabrication and site construction,but there is some mistake about it in practice.

节段施工桥梁的安装构形与无应力构形是现场施工和工厂预制的重要信息，而工程中对此存在一些误解。

Assembled geometry and unstrained geometry of segmental bridge provide important information for fabrication and site construction, but there is some mistake about itin practice.

节段施工桥梁的安装构形与无应力构形是现场施工和工厂预制的重要信息，而工程中对此存在一些误解。

Based on the compatibility between force and deformation, an approach to solving asembled geometry by iterating of construction sequence and to solving unstrained geometry by CR displacement was put forward.

根据力与变形的协调原理，提出求安装构形的大循环迭代法和求无应力构形的单元CR位移法。

Based on the compatibility between force and deformation,an approach to solving assembled geometry by iterating of construction sequence and to solving unstrained geometry by CR displacement was put forward.

根据力与变形的协调原理，提出求安装构形的大循环迭代法和求无应力构形的单元CR位移法。

When the skeleton deforms your geometry as much as it does here, it is very important that the geometry is in the exact same position it was before you bound it when you go to create your morph targets.

当你的骨骼变形尽可能它在这里，这是非常重要的几何形状完全相同的立场，这是它之前，你一定当你去创建自己的目标是几何变形。

This is the inheritance of the tribe of the children of Issachar according to their families, the cities and their villages.

19：23 这些城并属城的村庄就是以萨迦支派按着宗族所得的地业。

I've have enough of your garbage.

我听了你的废话。