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With the amount of data increasing rapidly, how to improve the scalability of nonlinear clustering has become a very crucial and challenging problem. In this paper, we design an efficient parallel nonlinear clustering algorithm by using a four-stage MapReduce framework. In our approach, we need to compute two quantities based on distance matrices, which, however, is difficult to compute in a MapReduce...
As we all know, it is an era of information explosion, in which we always get huge amounts of information. Therefore, it is in urgent need of picking out the useful and interesting information quickly. In order to solve this serious problem, recommendation system arises at the historic moment. Among the existing recommendation algorithms, the item-based collaborative filtering recommendation algorithm...
The procedure of matching vehicle location data onto road map is very essential for many ITS (Intelligent Transportation System) applications. However, with the boosting deployment of GPS devices in vehicles, the accumulation of huge amount of GPS data caused great challenge on the efficiency and scalability of traditional serial map matching algorithm. In this paper we address the challenge by presenting...
Many computer users suffer varying degrees of visual impairment, which hinder their interaction with computers. In contrast with available methods of vision correction (spectacles, contact lenses, LASIK, etc.), this paper proposes a vision correction method for computer users based on image pre-compensation. The blurring caused by visual aberration is counteracted through the pre-compensation performed...
When the network is increasingly becoming a part of people's lives at the same time, network and information security has also become one of the issues of most concern,. This article is based on a brief introduction in terms of information security, several commonly used way of authentication technologies and their advantages and disadvantages. Different levels of security authentication methods are...
The side conditions of HLA simulation system typically are that the simulation function of federate is in the collar of FOM in the special federation. There are ways to work around these deficiencies by importing BOM idea. However, applying BOM into HLA simulation systems increases the granularity and level of simulation, which enhances the difficulties of maintain the load balance. Consequently,...
T-Bezier curves and surfaces whose basis functions are constructed from the trigonometric polynomials, have properties similar to those of Bezier curves and surfaces. But they have more wide representations which can express arcs, cylinders and other transcendental curves and surfaces. In this paper, we discuss one kind of bi-cubic T-Bezier surfaces and provide the sufficient conditions of G1 continuity...
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