The sub-graph queryretrieves all of the graphs in graph database that contain the query graph.This paper discussed sub-graph query problem from two different perspectives. The first problem is query processing on dynamic graph data. The other one is query processing on uncertain graph data.In this paper, we define dual-branches feature and code of graph. An
(Read More…)
The mobile computing environment provides people with the capability of accessing the information at any place and at any time, but its characteristics of mobility, low bandwidth, frequent disconnection and the limited resources of mobile devices are the bottlenecks of mobile computing applications. To solve these problems, one of the methods is to utilize the
(Read More…)
Computing the shortest path between two given locations in a road network is an important problem that finds applications in various map services and commercial nav-igation products. The state-of-the-art solutions for the problem can be divided into two categories:spatial-coherence-based methods and vertex-importance-based approaches, which both are based on pre-computation techniques. The two categories of techniques,
(Read More…)
Database theory and technology has always been an important research area of computer science and relational database management system has been developed rapidly and become the mainstream of database field. Relational algebra are the mathematical theory basis of relational database query language included SQL, which is the official standard relational query language. It is important
(Read More…)
Searching advertising has evolved as the delivery of relevant, targeted text ad-vertisements for Web queries. To match the most relevant advertisements for queries,query processing algorithms were deeply researched during previous works, such asbool retrieval and query expansion.While most of current state-of-the-art algorithms appeal to Web search results asexternal resources to expand queries, we propose a
(Read More…)
With the rapid dvelopment of mobile devices and wireless internet, location basedapplications are getting popular. The spatial query technique plays an important role inlocation based applications. The cost of querying time is one of the key criterions to evaluatedatabase query systems. The spatial database always has large amount of data which makestraditional database queries difficult.
(Read More…)
In the 1990s, the rise of the Internet has accelerated the spread of information and knowledge. In recent years, with the popular of computer and high boosted performance of hardware, the text information presents a rapid expansion. Large-scale information retrieval system has made a great help for people who want to find some information they
(Read More…)
The invention of XML (Extensible Markup Language) changes the situation of web totally. XML has many advantages compared with HTML: semi-structure, self-description, flexibility and extensibility etc. It makes the separation of structure, content and display, which is good for data exchanges, personalized display and data integration among computers. Therefore, XML has been paid attention to
(Read More…)
In process of enterprise informationization.Because of all kinds of historical term,Different departments or subcompanies may have chose different software and hardware environments depend on its’ demand or special area’s applications,So that there are many different kinds of hardware environments,operating systems,database management systems.It results in “information island” and Data Heterogeneity in different department of enterprise.This paper
(Read More…)
The invention of XML (Extensible Markup Language) changes the situation of web totally. XML has many advantages compared with HTML: semi-structure, self-description, flexibility and extensibility etc. It makes the separation of structure, content and display, which is good for data exchanges, personalized display and data integration among computers. Therefore, XML has been paid attention to
(Read More…)
