例句與造句

1. the principle of the predigestion in geometry modeling is omitting the function part and the non-load-carrying process structure, and to the big and transition arc, the curve is replaced by straight line using the thought of curve and free-surface segmentation . the physical characteristic of the digital model reflect on remaining the main mechanical characteristic of the objects . the shell element model is used in strength analysis, stiffness analysis and dynamic analysis
   文中幾何建模的簡(jiǎn)化原則是,略去功能件和非承載的工藝結(jié)構(gòu),對(duì)于大圓弧和過(guò)渡圓弧,以曲面分塊和曲線分段的思想進(jìn)行適當(dāng)?shù)囊灾贝?數(shù)模的物理特性反映在最大限度地保留對(duì)象的主要力學(xué)特性;在強(qiáng)度、剛度和動(dòng)態(tài)分析中采用殼元模型,輕量化設(shè)計(jì)中采用梁元模型;材料特性根據(jù)所用材料定義其主要性能參數(shù)。
2. the constitution methods of converged surface based on the shape of around surfaces are proposed . meanwhile, the key technologies of 3d reconstruction for automobile panels are especially researched, which includes : after analyzing four data sources, which are engineering drawings, product, electric information and design thought, of reconstruction and their characteristics, the methods and flows of 3d reconstruction based on the different data sources are proposed; studied the technology of surface segmentation and splicing and blending of complicate surfaces and the difficult cases; the design criteria and specifications of 3d model and the basic framework of designing
   同時(shí)，在上述基礎(chǔ)理論的支持下，重點(diǎn)研究了汽車覆蓋件三維重構(gòu)的關(guān)鍵技術(shù)，主要包括：在分析工程圖、實(shí)物或模具、電子信息和設(shè)計(jì)思維四種重構(gòu)數(shù)據(jù)源及其特點(diǎn)的基礎(chǔ)上，提出了基于不同數(shù)據(jù)源的三維重構(gòu)的方法與流程；研究了曲面分割與拼接技術(shù)、復(fù)雜曲面的倒圓技術(shù)及難點(diǎn)解決方案；研究并建立了汽車覆蓋件三維數(shù)學(xué)模型的設(shè)計(jì)規(guī)范與技術(shù)要求以及基于正向設(shè)計(jì)和三維重構(gòu)設(shè)計(jì)思路的汽車覆蓋件的開(kāi)發(fā)流程基本框架；提出并研究了基于二維工程圖與模具型面點(diǎn)云的曲面重構(gòu)流程和數(shù)據(jù)處理方法。
3. It's difficult to find surface segmentation in a sentence. 用surface segmentation造句挺難的