The existing query languages for XML (e.g., XQuery) require professional programming skills to be formulated, however, such complex query languages burden the query processing. In addition, when issuing an XML query, ...
详细信息
ISBN:
(纸本)9781467300421
The existing query languages for XML (e.g., XQuery) require professional programming skills to be formulated, however, such complex query languages burden the query processing. In addition, when issuing an XML query, users are required to be familiar with the content (including the structural and textual information) of the hierarchical XML, which is diffcult for common users. The need for designing user friendly interfaces to reduce the burden of query formulation is fundamental to the spreading of XML community. We present a twig-based XML graphical search system, called LotusX, that provides a graphical interface to simplify the query processing without the need of learning query language and data schemas and the knowledge of the content of the XML document. The basic idea is that LotusX proposes "position-aware" and "auto-completion" features to help users to create tree-modeled queries (twig pattern) by providing the possible candidates on-the-fly. In addition, complex twig queries (including order sensitive queries) are supported in LotusX. Furthermore, a new ranking strategy and a query rewriting solution are implemented to rank and rewrite the query effectively. We provide an online demo for LotusX system: http://***:8080/LotusX.
Clustering semi-structured dataset is a hot research topic recent years. In this paper, we proposed an algorithm named LESC to cluster XML documents collection by the leaf elements. First, we discuss the basic princip...
详细信息
knowledge Reformulation and Abstraction model have been proposed to be a model of representation change that includes both syntactic reformulation and abstraction. We furthermore extended the process on the basis of t...
详细信息
knowledge Reformulation and Abstraction model have been proposed to be a model of representation change that includes both syntactic reformulation and abstraction. We furthermore extended the process on the basis of the ontology classes and the mappings between them and particularly the concept of goal perception is proposed to formalize the goal-based hierarchical process of workflow abstraction modeling. This paper furthermore introduces system-centered ontology to formalize the hierarchical workflow modeling process. We propose the concept of workflow fragment-based ontology class and provide its hierarchical abstraction process respectively from the object-based perspective and the flow-based perspective, i.e., workflow fragment abstraction and workflow fragment aggregation. Workflow fragment-based ontology class gives the mechanism of system-centered knowledge learning, sharing and reuse to save the cost of redesign and remodeling of workflow models. The hierarchical workflow abstraction model based on workflow fragments (from the perspective on the basis of system-centered ontology) is constructed which is more abstract than based on object-centered and simplifies the reasoning.
Join processing in wireless sensor networks is a challenging problem. Current solutions are not involved in the join operation among tuples of the latest sampling periods. In this article, we proposed a continuous Sin...
详细信息
Join processing in wireless sensor networks is a challenging problem. Current solutions are not involved in the join operation among tuples of the latest sampling periods. In this article, we proposed a continuous Single attribute Join Queries within latest sampling Periods (SJQP) for wireless sensor networks. The main idea of our filter-based framework is to discard non-matching tuples, and our scheme can guarantee the result is correct independent of the filters. Experiments based on real-world sensor data show that our method performs close to a theoretical optimum and consistently outperforms the centralized join algorithm.
Abstraction is a pervasive behavior of people's perception, conceptualization and reasoning. The knowledge reformulation and abstraction model has been introduced to formalize the workflow abstraction modeling pro...
详细信息
Abstraction is a pervasive behavior of people's perception, conceptualization and reasoning. The knowledge reformulation and abstraction model has been introduced to formalize the workflow abstraction modeling process which is an iterative learning process of "Perception-Abstraction". The concept of domain is introduced into the general knowledge reformulation and abstraction model to extensionally extend the reasoning ability. In this paper, we provide the process of multi-domain workflow abstraction modeling on the basis of the extended general knowledge reformulation and abstraction model. We think of the steps of the workflow as multi-domain tasks, i.e., they can play different roles in different workflows. By perceiving the tasks that work in multiple domains, we define the multi-domain tasks and through them build the multi-domain relations between different workflow, so that the multi-domain workflow perception is constructed which shows more reasoning perspectives than the single-domain workflow model.
Multi-objective decision-making problems have been widely applied to business, financial investment, transportation, optimal routing design, environment protection, and military strategies. In this paper, we give a no...
详细信息
A performance evaluation model, weighted AUC (wAUC), is proposed to determine a better way to measure the imbalanced data learning classifiers. When computing the weighted area under the ROC curve, weights vary with t...
详细信息
Community mining has been the focus of many recent researches on dynamic social networks. In this paper, we propose a clustering based improved ant colony algorithm (CIACA) for community mining in social networks. The...
详细信息
作者：
LI YONG XU LUCollege of Mathematics
Key Laboratory of Symbolic computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012
In this paper, we study the persistence of lower dimensional tori for random Hamiltonian systems, which shows that majority of the unperturbed tori persist as Cantor fragments of lower dimensional ones under small per...
详细信息
In this paper, we study the persistence of lower dimensional tori for random Hamiltonian systems, which shows that majority of the unperturbed tori persist as Cantor fragments of lower dimensional ones under small perturbation. Using this result, we can describe the stability of the non-autonomous dynamic systems.
暂无评论