查询词典 concave polygon

This paper aims at the prominent issue that current models of spatial topological relations can not represent complex object, among which 9-Intersections Model (9IM) is well known. Therefore, taking cadastral data as example, one model of topological relations between complex and spatio-temporal objects based on 9IM is put forward. And the improved sweep-line algorithm is designed. Specific studies as follows:(1)According to the concepts of point set topology, the author distinguishes the complexity of the object, redefines the spatial point, line and region. For instance, in the simple region, concave one is more complex than convex, composite regions can be composed of many parts or with holes, and so on.

本文针对当前空间拓扑关系模型无法表达复杂对象的突出问题，以地籍对象为实例，以9I模型为基础，探索了一种适合复杂对象和时空对象的拓扑关系表达模型，较好地解决了地籍对象中各类要素间拓扑关系的描述和应用，实现了地籍变更中变化语义类型的推理和历史回溯；通过对现有的拓扑关系计算方法进行了改进，设计了相关算法，给出了C语言程序示例；最后通过实验系统的实现，验证了模型和算法的可行性。

There were many concave hollows and convex domes with seta on the surfaceof pincer, and some spines were observed on the surface of seta, which exhibited non-smoothsurface.

在螯的表面存在微小凹坑和半圆微凸起，在凹坑内和微凸起周围有刚毛，刚毛上有小刺，呈非光滑表面。

A long stick with a concave attachment at one end for shoving disks in shuffleboard.

推铲一端带有凹头的长棒，用于在打圆盘游戏中推动圆盘

Mixed monotone operator; Singular two-point boundary value problem; Generalized e-concave operator; Generalized e-convex operator; Mixed monotone multivalued operator; Fixed point

基础科学，数学，数学分析混合单调算子；奇异两点边值问题；广义e-凹算子；广义e-凸算子；混合单调多值算子；不动点

It has clear skeleton and construction with inclining head, big and black eyes, hang-down eyelid, concave-down face, broad nostrils, long mouth.

低下的马头，大而黑的眼睛微微低垂的眼皮，下凹的面部。宽大的鼻孔，和长长的嘴，骨骼、结构清晰。

The product for net slabstone forming mold, the product design main point for mold's internal surface, the product internal surface for wave form concave-convex structure.

本产品为网片石成形的模具，本产品的设计要点为模具的内表面，本产品内表面为波浪式的凹凸结构。

I have designed a mold cavity injection mold Through to the lid craft's correct analysis,and narrated the mold formation components, the raised template, the concave template, the push pedal, a frame plate as well as the diagonal draw bar, the slide in detail and so on design.

摘 要：通过对盒盖工艺的正确分析，设计了一副一模一腔的注塑模具。

Snook have a long, concave snout and a lower jaw that juts out beyond the upper jaw.

斯努克有长、凹口鼻和一个超越上的下巴 juts 的下颚。

The surface polished by soft disk is easily to become concave surface under pressure. So soft disk is suitable for curve surface polish.

软盘抛光的抛光面，在石材受压时易屈服成一凹面，适用于弧面型抛光。

This paper presents the principle, structure and aberration-corrected designing of a flat focal field concave grating spectrograph.

介绍了用于 X光能谱测量研究的平焦场凹面光栅光谱仪的原理、结构及象差校正的设计方法。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。