层次

First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

首先研究加工过程仿真的数学基础，然后定义数控加工仿真系统的集合结构及时间集、输入集、输出集等概念，建立加工仿真的层次结构和逻辑结构，阐述双刀车削仿真系统的静态模型和动态模型建立方法，分析刀具扫描体和旋转部件扫描体的建立方法及其微分几何性质；研究NC代码解读技术和双刀加工时间段递归子分划技术，为驱动各仿真单元作数据准备；通过讨论后刀面和工件表面交线的存在性判断刀具后刀面与工件间是否干涉，通过求多边形的交集判断刀架与刀架是否干涉。

The significance of the spatial variation in gene diversity among populations was estimated by per-forming a hierarchical analysis of genetic diversity among populations using the analysis of molecular variance model, as described in Michalakis and Excoffier (1996) and available in ARLEQUIN.

种间基因多样性空间变异的显著性用在分子变异模型上操作的种间遗传多样性层次分析来估计，如同Michalakis和Excoffier (1996)描述的，并且在 ARLEQUIN软件中也有效。

Rodolf Arnheim's theory of General Nature in logo form was analyzed. It discussed the relationship of the general nature and unique nature,and how to absorb the theory to upgrade thinking level of logo.

分析阿恩海姆关于标志形式的一般性质的理论，阐述了标志形式一般性与独特性的关系，以及如何吸收这个理论提升标志设计的思维层次。

We should attach importance to the democracy at grass-poots level, arouse the enthusiasm of the people and the primary organization?.

在层次上要重视基层民主，"把人民群众和基层组织的积极性调动起来"。

This is a useful way of indicating a visual hierarchy, particularly when you have too many elements to arrange into a neat cascade.

视觉层次，这是一个有用的方式显示一个，尤其是当你有太多的内容安排成一个整洁级联。

Objective To probe into MRI characteristics of articular cartilage and various influencing factors.

目的 探讨关节软骨的MRI表现特点以及各种因素对软骨层次、厚度和信号强度的影响。

On articulatory level of motor planning or motor executive, while the PSD group the general phonological system.

rating以及在新词发音及区辨工作中的表现，发现两组之间可能存有不同层次的音韵问题。

This thesis makes an in-depth study on how to extract features from high-level information such as prosodics and articulatory properties,and on how to utilize them in text-independent speaker recognition.

本文对韵律、发声特点等高层次特征信息的提取方法及其用于文本无关的说话人识别进行了深入研究。

This is one woodcarver who has raised himself in status from artisan to artist.

这样的木雕师傅，已把「工匠」的地位，提升到「艺术家」的层次了。

The research shows, a series of quite disputed topics drawn out by unpaid blood donation, have shown the contradictions and interest conflicts of many levels in modern social economic resource, culture, ethics, etc. However, the media judge the case as it stands while carrying on the unpaid blood donation report, seldom touch the essence of the concern, make very complicated on unpaid blood donation and relevant concepts, and propagate the administration's planning mandatory unpaid blood donation excessively.

本研究认为，由无偿献血牵引出的一系列颇具争议的议题，集中展示了现代社会经济资源、文化、伦理道德等多个层次的矛盾与利益冲突，而媒体进行无偿献血报道时就事论事，很少触及问题的本质，在无偿献血及其相关概念上纠缠不清，且对计划行政指令性无偿献血过度宣传。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。