The following sub section steps a user through obtaining the search path for the template to be used as a global IBM Query Studio template. 以下小节逐步指导用户获取将用作全局IBMQueryStudio模板的模板搜索路径。
On the base of this system, a query reformulation algorithm is designed to transform query on global schema to query on local schemas. 基于该方法,构造了查询重构算法,把基于全局模式的查询转换到基于数据源模式的查询,并通过一些实例加以说明。
The purpose of the thesis is to investigate the energy efficient local query and global query protocols for wireless sensor networks ( WSN). 针对不同的查询要求,分析适合于无线传感器网络局部查询和全局查询的查询路由协议是论文的主要研究内容。
Decomposition and optimization of global query is one of hard problems in heterogeneous database integration. 全局查询的分解与优化是异构数据库的集成中许多难题之一。
In this paper, discuss some process of global query optimization and the application of simulated annealing. 文中讨论了全局查询优化的过程以及模拟退火算法在全局查询优化中的应用,并对算法进行了一些改进。
The Study of Global Query Technology of Heterogeneous Data Source 异构数据源统一查询技术的研究
The detail design and implement of key parts in each module is also given, which include Global mode integration, query language conversion, query decomposition, query plan definition and local data source access. 接着给出了各模块中的关键部件的详细设计与实现,主要包括:全局模式集成,查询语言的转换,查询的分解,子查询计划的定义,局部数据源访问。
Therefore, based on characters of data global query on the condition of distributed environment, an optimization algorithm is presented for the global query: an algorithm of optimization based on a weighed query tree. 因此根据数据全局查询优化在分布式条件下的特点,给出了分布式环境下的查询优化算法:基于带权查询树的优化算法。
Designing the global query language based on SQL. 设计了基于SQL的全局查询语言;
In the base of the principles of multidatabase's data model, the integrated data model of Engineering database is presented in this paper to meet the needs of practice, and a global query decomposition algorithm based on this model is designed and implemented. 该文在借鉴多数据库模式结构划分原理的基础上,根据实际应用的需要,提出了基于多数据库的工程数据库集成模式结构,并且设计和实现了基于该结构的工程数据库查询分解算法。
For the purpose of obtaining the global knowledge to guide route query, the index and route information distributed on each node of the searching subnet is mapped into a Hash Table, consequently constructing a global resources view. 为了获取指导查询路由的全局知识,把分布式存储在搜索子网各节点上的资源索引信息以及路由信息通过哈希函数映射到一张哈希表,从而构建了资源的全局视图。
More generally, in this paper, we provided a global database query system which based on several database query systems and it was called WAN ( Wide Area Network) database query system, the databases are no more confined to web pages. 更一般的,我们提出广域网数据库查询系统,广域网数据库查询系统是架构于各个专业数据库系统之上的查询系统,各个专业数据库系统存放的不再局限于网页数据库。
In the distributed environment, the cost function space shape of global query includes many partial minimum status, so need to do partial optimization for some times in oder to find the global minimum status. 在分布式环境下,全局查询的代价函数空间形状包含了很多局部最小状态,需要多次局部最优化才可以找到全局最小状态。
The thesis also discusses how to optimize data query in a distributed environment by analyzing different query methods, and concludes the general rules in different conditions such as local query and global query, the rules are helpful to improve response time and save transmission cost. 在分布式环境下,通过实例分析比较了同一问题采用不同查询方法处理的响应时间,总结出局部查询和全局查询优化的一般规律,从而提高响应时间,节省通信传输费用。
Then information integration process, global query processing and query planning are explained in detail. 详细说明了信息集成的过程、全局查询处理和查询规划;
The extreme element algorithm and its application in the global query optimization 极值组合元素算法及其在全局查询优化中的应用
According to the semantics of global query answering, we explain and prove this algorithm by examples. 并通过查询响应语义和具体例子分析了该算法的正确性。
At present, there are mainly the concentration query, the global user query, genetic algorithm, back tracking query, and so on, but all have very low efficiency in query. 现有的查询方法主要有集中式查询、全局用户查询、遗传算法、回溯法等,但这些方法的查询效率都较低。
Then by making use of the mapping rules from local Ontology to global Ontology, the query tree is decomposed into sub-trees, and the query decomposition algorithm is also presented. 通过对查询语言的解析,建立查询树,然后根据从局部本体到全局本体的映射规则,该查询树被分解为对局部数据源的子查询,提出了查询分解的具体算法。
The global ontology unifies the query access and establishes semantic connections among the underlying local XML data sources. The query on global ontology is processed using query translation from an RDF query to an XML query. 全局本体统一查询访问并在后台局部XML数据源之间建立语义关系,在全局本体上的查询通过从RDF查询到XML查询的转换被处理。
This paper proposes a global query optimization algorithm based on a faster decomposition-based simulated annealing algorithm. 文章提出了一种基于快速分解模拟退火算法的全局查询优化算法。
Combining with the experience of practice, simplified the flow of global query decomposing with a method of inserting flag. 针对全局查询的分解,结合实践经验,提出了一种加标志法简化了全局查询分解的流程。
Parsing of global query generates a query tree. 查询语句解析产生查询树。
To avoid the tedious and time-consuming process, an effective solution is to build a virtual integrated system on these data sources, providing the user with a global query interface. 为了避免这个既枯燥繁琐又费时的过程,一个有效的解决方案就是在各个不同查询接口的数据源上层建立一个虚拟的集成系统,提供给用户一个满足全局查询能力的统一的集成接口。
Query processing contains parsing of global query, binding of query variable, decomposition of query and rewriting of query. 查询处理包括全局查询语句解析、查询变量绑定、查询分解和查询重写。
After making an in-depth research on methods of global query processing, the dissertation elaborated several rules that proposed to be obeyed in optimizing query, and then gave the operation details. 深入研究全局查询处理方法,提出了查询优化中优化遵循的原则,并给出了具体操作方法。
We analysis and comparative the different query technologies, investigated the local query and the global query strategies in wireless sensor network based on comb needle. 在分析和比较不同的查询技术的基础上,论文在梳针查询的基础上,研究了适合与局部查询和全局查询任务的梳针查询技术。
The framework of Ontology based Proactive Knowledge System ( Ontology based Proactive Knowledge System, OPKS) is proposed and some key techniques, such as, user knowledge requirement, ontology mapping, ontology evolution, global query, are studied. 论文提出了基于本体的主动式知识系统(OntologybasedProactiveKnowledgeSystem,OPKS)框架,研究了用户知识需求、本体映射、本体进化、全局查询等关键技术,构建了系统原型。
Then design and implement the Assistant Sci-tech Novelty Retrieval System based on middleware by application of the above system structure. Moreover, we also design the method of global query, result integration and filtering process system. 设计并实现了基于中间件的科技查新辅助检索系统的各个功能模块,解决了系统中全局查询、结果集成、数据过滤等问题。
First of all, it introduces the way of building the global ontology and the local ontology. According to the mapping rules from local ontology to global ontology, it decomposes the global ontology query to the local ontology sub-query and gives the query decomposition algorithm. 首先研究了全局本体与局部本体的构建方法,根据局部本体到全局本体的映射规则,把针对全局本体的查询语句分解为对局部本体的子查询,并给出了查询分解算法。