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DNA sequence alignment forms an important basis for bioinformatics. Developing accurate sequence alignment algorithms remains to be a very challenging computational problem. When applied to sequence alignment, the traditional ant colony algorithm is limited to aligning sequences of similar length and may cause a local optimum. An improved sequence alignment method based on the ant colony algorithm...
To accurately predict messenger RNA polyadenylation sites of the model plant Arabidopsis, we developed a new program using the method of High-Dimensional Space Points' Covering, based on Biomimetic Pattern Recognition Theory. Upon analysis of experimental data and comparing with the results produced by Support Vector Machine, it is demonstrated that our program is reliable and effective judged by...
Due to their dynamic topologies, providing quality of service (QoS) in wireless ad hoc networks introduces major new challenges to the research community. Now, the commercially available ad-hoc network products are those based on the IEEE802.11 Distributed Coordination Function (DCF). Cooperative communications fully leverages the broadcast nature of the wireless channel and spatial diversity, thereby...
A numerical optimization method for module identification based on particle swarm optimization (PSO) algorithm is proposed. A series of property correlations facing the product lifecycle are divided into functional, geometrical, physical and auxiliary ones, and the synthesis design structure matrix (DSM) is obtained. The optimization function for module identification is then established based on...
This paper presents a method to build a real-time distributed operating system. We first discuss the theory of microkernels and their operating system implementations, to find a way to build a real-time distributed operating system that meet the requirements in constructing tightly coupled multi-robot architecture.We choose DROPS as the basis, and do many modifications on real time and distributivity...
The aim of melody extraction is to identify the melody from polyphonic musical files. Although researchers have made great progresses in this field, the need for more efficient methods is still not satisfied. This paper proposes an algorithm for extracting the main melody from polyphonic MIDI files based on the melody similarity computation. Experiments show that this approach is effective. We have...
Based on the features of circle-like edge in digital image, an algorithm is presented in which the evolute of edge is calculated and from its distribution, the circles are located. The edge of target is first extracted and traced. Then the centers of curvature are calculated by least square fitting in fraction of edge and thus the evolute of edge is worked out. From the evolute distribution and the...
Internet Service Provider (ISP) needs to evaluate change of network congestion level, accordingly takes measures of congestion control to mitigate network congestion and guarantees to provide definite quality of service (QoS) for users. After autonomous system (AS) performance matrix model was introduced, a new path performance metric RL was defined firstly, and then four kinds of scalar quantity...
DOD architecture framework (DODAF) can describe not only operation activities in military field, but also composition of system in non-military field. By studying DODAF, description and analysis methods of it are abstracted in this paper, and information system architecture framework is proposed from view of non-military. In this framework, fourteen products that describe information system architecture...
With the latest semantic annotation specification SAWSDL provided by W3C, web service components were annotated, and annotation process and method were discussed in detail. At the same time, a framework for web services matching and composition was present and its prototype was developed. Service matching algorithms, which were integrated in a service template, were stressed from aspects of function...
Particle swarm optimization (PSO) is an emerging intelligent optimization algorithm. Because of its excellent characteristic, PSO has been wildly researched and applied to tackle optimization algorithm in continuous space. As PSO cannot optimize the discrete optimization problem, Kennedy proposed a discrete binary PSO firstly, and then Shen proposed a modified binary PSO, but the further research...
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