Evolution hypergraph net was introduced to formalize product process information for life cycle 引入进化超图网络对全生命周期中产品过程信息进行形式化表达。
The structures of product information were formalized by structural hypergraph . vpmflc will be studied progressively by hypergraph 用结构化超图对产品信息的分类和组织关系进行形式化描述。
We propose to analyze the spacial conformation of particles by integrating the concepts of the convex hull , hypergraph and depth 摘要本文的主要目的是把空间多面体、超图与深度这三个概念综合起来,作为描述与分析空间质点系形态的基本工具。
It must be in reason to structure product information . it provides the base to search , reuse , modify , and trace product information . the theory research of vpmflc was presented by hypergraph 面向全生命周期虚拟产品模型对全生命周期产品信息进行结构化集成;在结构化过程中应使产品信息表达合理,为产品信息的快速检索、重用、修改以及追踪提供基础。
Markov ' s inequality and four kinds of lovasz local lemma , and give different applications in hypergraphs with these probabilistic methods , we find different conditions for a hypergraph to be 2 - colorable with some kinds of thinkings ) sz局部引理的内容,给出了这几种概率方法在超图上的应用,用几种思路找到了超图存在2 -可染色的不同条件,其中着重对一般形式的lov (
Research result shows that the object - oriented geographic spatial model has stronger representative ability , is easier understood and accepted ; using the concept of geometric data type unify the process method of attribute and spatial data , and simplify entity query and analyses . the topologic relations between entities , which are not been stored in explicit formulation in the model , can be achieved through collective operation of geometric object ' s hypergraph model . compared with traditional his , the query and analyses ability of which based on new model are stronger 研究结果表明,面向对象的地理空间模型具有更强的表现能力,并且容易被理解和接受;采用几何数据类型的概念,可以使对非空间数据和空间数据的处理方法相统一,而且会使对实体的各种属性数据(包括空间属性)的查询和分析模型更加简单;对于面向对象模型中不显式表示的地理实体间的空间拓扑关系,可以利用实体的几何对象的超图模型间的集合运算来求得;基于面向对象地理空间模型的实体查询和分析,也比基于传统gis数据库查询和分析具有强得多的功能。
And hbds model is extended to hoom model . hoom is an objected - oriented integrated spatial model , which integrated geometric model , geographical feature model , geographical representation model , spatial calculation model and temporal model that based on hypergraph model . a normal object - oriented multi - resolution model is proposed to manage integrated multi - resolution spatial data that is dlg and dem data 这两类空间数据的建模方法存在较大的差异,第一类数据的建模是通过特征模型和超图对象模型实现的,第二类数据的建模是通过对自适应规则三角形和不规则三角形的简化与细化算法的研究实现的。
The former one gains the aim of improving the recommended speed by grouping the transaction clusters , which make system has ability to solve the limitations of the collaborative filtering technology which ca n ' t process huge data . the latter one adopts hypergraph partitioning skill and effectively groups the association rules according to the users " historical visiting data 基于关联规则聚类的推荐算法采用超图划分的技术,对根据用户的历史访问数据得到的关联规则进行有效的分组,可以找出不同兴趣用户群的相同访问模式,提高了推荐的质量。
As far as model is concerned , the forth generation software should be characterized with spatial entity - oriented . the paper established the geographic spatial model based on the thinking of object - oriented ; studied the structure of the model " s elementary unit - - geographic entity ; brought forward the concept of geometric data type which characterize entity ' s spatial feature in the structure ; defined five kinds of geometric data types such as point , arc , area , composite arc , composite area ; and formalized their collective operation using hypergraph . at the end of this paper writer studied preliminarily the method of entity query and analysis based on the model 本论文从面向对象的基本思想出发,建立了面向对象的地理空间模型;研究了地理空间模型中的基本单位? ?地理实体的结构,针对实体结构中用来表征实体空间特性的组成部分? ?几何对象,提出了其取值范围,即几何数据类型的概念;对点、弧、面、复合弧和组合面五种几何数据类型进行了定义;并使用超图工具对几何数据类型的集合操作进行了形式化描述;对基于面向对象的地理空间模型的实体查询和分析方法也做了初步研究。