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At present, urban transportation systems are increasingly developed. But there are still many unresolved problems for the blind who have visual obstacle in the travel, particularly in a long journey by car. In this paper we present a remote assistant platform for the blind based on GIS, which can exchange the information with the portable navigation devices in the blind, to help them travel.
In this paper, the quadratic-programming (QP) based scheme-formulation is employed to handle the joint-angle-drift problem of a redundant three-link planar robot arm with its end-effector moving along different types of trajectories (e.g., a Lissajous-figure path, a triangular path and an elliptical path). The physical constraints such as joint limits and joint velocity limits are considered as well...
The modified nanometer-sized TiO2 as a solid sorbent was prepared by using impregnation method, and characterized by using SEM. The adsorption properties of the sorbent to Co(II) in static system, main factors affecting the adsorption and desorption, adsorption isotherms and influence of coexisting ions on the determination of Co(II) were investigated by FAAS, and regeneration experiments were carried...
We studied static data management problem based on data merging in general networks with object to minimize the total costs. By using greedy and LP-dual method, an initial placement is acquired. Given network G=(V, E) and data set X, we can achieve a constant ratio approximation algorithm.The key of our method is to construct some clusters based on hierarchical structure for requests. In order to...
A modelling language can be defined by a metamodel in UML class diagram. This paper defines the semantics of such metamodels through two mappings: a signature mapping from metamodels to signatures of first order languages and an axiom mapping from metamodels to sets of axioms over the signature. Valid models, i.e. instances of the metamodel, are therefore mathematical structures in the signature that...
Given the rapid rise of model-driven software development methodologies, it is highly desirable that tools be developed to support the use of design patterns in this context. This paper presents such a tool, called LAMBDES-DP, with UML diagrams as the software design models. Its theoretical foundation is a descriptive semantics of UML in first order logic, and the design patterns are formally specified...
By applying interleaving to Window TNAF Algorithm, this paper advances a new scalar multiplication algorithm. The algorithm has no precomputation, just exerts interleaving at the evaluation stage. Because of high performance of Frobenius map, additionally making use of interleaving, efficiency of the new algorithm is higher than traditional window algorithm.
The fine-grained access control approaches in DBMSs should satisfy soundness property which requires the answer of a query returned by the approach under the control of fine-grained access control is consistent with the answer when there is no fine-grained access control. However, existing techniques cannot guarantee soundness property for all SQL queries. Therefore, for an approach, there is a practical...
To reveal the impact of knowledge sharing in virtual communities on consumer behavior is an important work of current. This paper is designed to explore the relationship between knowledge sharing in virtual communities and consumerspsila brand trust by empirical methods. A relationship model of content of sharing, sharing degree and consumerspsila brand trust was constructed. The results show: sharing...
At present, Web Services invocation follows the ldquobind-once-invoke-many-timesrdquo pattern, while the Web Services run in a failure prone environment. Therefore, Web Services are not actually used on a large scale in real business world which calls for high robustness and trustworthiness. To solve this problem we propose an Agent-based Adaptive Dynamic Semantic Web Service Selection framework,...
Word sense acquisition and distinction are key issues for both lexicography and lexical semantic processing. However, it is quite difficult to automatically acquire word senses and to further evaluate the results with the lexica, which more likely bear the different findings of word sense distinction and granularity. In this paper, we'd like to put forward the idea of measuring word polysemousness...
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