tree n. 特里〔姓氏〕。 n. 1.树〔主要指乔木,也可指较大的灌木〕。 ★玫瑰可以称为 bush, 也可以称为 tree. 2.木料,木材;木构件;〔古语〕绞首台;〔the tree〕(钉死耶稣的)十字架;鞋楦。 3.树形(物),世系图,家系 (=family tree);【数学】树(形);【化学】树状晶体。 a banana tree 香蕉树。 an axle-tree 心棒,轴料。 a boot-tree 靴楦[型]。 a saddle-tree 鞍架。 at the top of the tree 在最高地位。 tree of Buddha 菩提树。 tree of heaven 臭椿。 tree of knowledge (of good and evil) 【圣经】知道善恶的树,智慧之树。 tree of life 生命之树,生命力的源泉【植物;植物学】金钟柏。 up a tree 〔口语〕进退两难,不知所措。 vt. 赶(猎兽等)上树躲避;〔口语〕使处于困境;穷追;把鞋型插入(鞋内)。
Then in order to realize the universal representation , the xml dtd is created based on the hierarchical tree structure for data instance . at last with the help of sx _ viewer , to prove feasibility and practicability , the process and result of the conversion example is presented . in the 6th chapter , according to the xoem model , the base cell of fractal hierarchy - extensive hyperlinks is proposed as unified information structure for xml ; and then the description of the corresponding rules is presented ; at last a uniform template of the xml dtd is put forward 在第五章中,针对产品数据表达的step标准,重点研究了在www环境下step产品数据的web描述方法,建立了express语言与xml语言模式的匹配,在此基础上研究了steppart21物理文件的xml转换和表达,建立了统一的xmldtd ,从而在保持可扩展性和可移植性前提下实现了基于xml的step物理文件表达的通用性、统一性和完整性,最后结合实例介绍了sx _ viewer转换器实现steppart21物理文件的转换功能。
This paper introduces a video intelligent surveillance system , and presents the structure of the system , adaptability for bandwidth and the method for intelligent surveillance . it describes the key technologies , such as wlan , efficient video coding arithmetic based on spiht ( set partition in hierarchical trees ) , intelligent alarm aroused by video - recognizing , and so on , gives out the testing results and important parameter of performance by realizing the system 提出了基于无线网的视频智能监控系统的原理结构、带宽适应性和智能监控的实现方法,描述了系统中使用的无线组网、基于spiht视频编解码算法和基于内容的视频识别等关键技术,给出了系统实现后的实际测试结果及相关性能指标。
On the basis of analyzing two kinds of assembly model structures , the hierarchical tree shaped model and the relationship net model , and in accordance with the requirements of assembly sequence planning , the product ' s assembly information model that satisfied the assembly sequence planning was established by applying the object orientation method , and the corresponding data structure was put forward , thus provided reason able information frame of product for the sequence planning of virtual assembly 摘要在分析了层次树状模型与关系网络模型这两种装配模型结构的基础上,根据装配序列规划的要求,应用面向对象的方法建立了满足装配序列规划的产品装配信息模型,提出了相应的数据结构,为虚拟装配序列规划提供了合理的产品信息框架。
Based on them , it sketchily describes the thoughts and methods of the developing of the general assembly simulation software , which is the prototype of software developed upon the paper . the software is to simulate the assembly process of the product , in which the assembly model described by hierarchical tree is the fundamental and the result of the assembly sequence and path planning by means of disassembly via input through human and computer interaction proper assembly modeling is the base of the whole assembly simulation system software 在此基础上,本文介绍了通用装配仿真系统的具体实现思路和方法:本系统是以建立在pro engineer软件基础上的多叉树结构的等级模式装配模型为系统的基础与主线,以拆卸法为装配规划方法的人机交互式的装配序列与路径规划的结果作为输入信息,而对产品装配体进行装配过程仿真的。