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The improved fisheye views algorithm is introduced as a method to deal with the visual problems in traditional 2D visual programming languages where programming elements are represented by 2D graphical objects. A prototype VPMF is developed to show the dynamically adjusting of the graphical objects and to see the local details and global context simultaneously. The validity and effectiveness of our...
Components composition is core techniques of software product line, which can promote reuse of components. Variability exists in components and components composition in SPL context, which bring new challenges to tradition components composition techniques. vADL can formally describes SPL architectures, and also supports layered components compositions. The paper provides systemic methods for components...
The publish/subscribe communication paradigm is receiving increasing attention in distributed networks, in which routing strategy is one of the key issues. Many existing routing strategies are filter-based routing and multicast-based routing; they have obvious improvement in network efficiency. However, there are some shortcomings in implementation cost and system load, therefore they are not mature...
Supplier selection is a multi-criteria decision making problem which includes both qualitative and quantitative factors. In order to select the best suppliers, it is necessary to make a trade-off between these tangible and intangible factors some of which may conflict. When business volume discounts exist, this problem becomes more complicated, in these circumstances, buyer should decide about two...
In a complex system, schemes are affected by lots of factors. The evaluation must take all the factors into account. The nature of the factors are fuzzy and grey, this paper apply grey relational analysis and entropy weights into fuzzy design theory, and solve the problem of three levels structure fuzzy comprehensive evaluation. A practical example of torpedo is showed to prove the validity of the...
A new content-based routing (CBR) approach called ROSE is proposed to realize CBR in very large-scale publish-subscribe systems. ROSE relies on a ring space where subscriptions and events are routed along distinct, albeit intersecting, partitions. An analytical model of ROSE is derived, and validated through simulation. The results from theoretical analysis, simulations, and experiments show that...
We introduce an idea or a concept of restricted coexistence. By the restricted coexistence, the Ramsey number R(p,q) is defined equivalently as r(p-1,q), that is, R(p,q)=r(p-1,q), where r(p-1,q) is a least integer that has coexistence restricted to the parameters p-1,q with q ges p ges 2. From this, some basic properties about Ramsey numbers are obtained, for instance, R(p,q)>R(p-1,q+1), where...
A visual cryptography scheme (VCS) for general access structures is a method to encode a secret image into n shares for n participants. Only qualified subsets of participants can recover the secret image. The yet known schemes omitted the deference between primary information and secondary one in secret image, and its best known upper bound on the share size is exponential. Besides its information...
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