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In this paper, we present a revised method to compute the similarity of traditional string edit distance. Given two strings X and Y over a finite alphabet, an edit distance between X and Y can be defined as the minimum weight of transforming X into Y through a sequence of weighted edit operations. Because this method lacks some type of normalization, it would bring some computation errors when the...
Dynamic model of a rotor-journal bearing system under base shock excitations was established. Energy differential equations were derived by applying Lagrange equation with FE in space domain. Bending and shear deformation energy of shaft element were taken into account. Inertia force due to rotor mass eccentricity was introduced and treated as a generalized external force. Oil-film force was determined...
A new open-circuit fault diagnosis scheme, which is capable for detecting one or two open-circuit fault of power switches in the back-to-back converter of a DFIG wind power generation system is proposed. A redundant topology for the back-to-back converter is set out enabling reconfiguration of the converter circuit once the faulty device or devices is identified and isolated. Simulation results show...
At present, there are two different research in the forefront of studying the virtual campus roaming, they are geometric model-based virtual reality technology and image-based virtual reality technology. Based on geometric model-based virtual reality technology, the paper has designed and realized a desktop virtual campus cruising system that has real-time interactivity, immersion and telepresence...
This article introduced the concept of ontology to knowledge representation of image recognition of stored-grain pests; it focused on the use of ontology to organize and implement the ontology model, and constructed image recognition of stored-grain pests' knowledge base what could be shared by the expert system. Finally, it basically achieved system framework of the knowledge base.
This article proved some properties about anti-homorphism on a group, and gave an example which shows that anti-homorphism on a group doesn't satisfy the homomorphism theorem. Finally the author gave its applications on matrices.
In two player games players are in conflict to each other and coalitions are not allowed but in three-player games two players can join their efforts against the third player. As a result, cooperation is a key-factor that deeply affects the complexity of three-player games. In the game of Shove, cooperation can be much more difficult than competition and, as a consequence, three-player Shove played...
As a new computing paradigm, Cloud computing has been advocated by IT industry and academia. It can provide lots of services, however, how to manage these services and guarantee the quality of service, has become one of the key factors for the development of Cloud computing. This paper proposes a hierarchical architecture model of Cloud services resources management and monitoring by integrating the...
Satellite-borne rectangular waveguides operate in a high vacuum space environment and also under high RF power. Both these conditions favour the initiation of the multipactor breakdown, a phenomenon that limits greatly the output power of any communication satellite. Multipactor breakdown or multipactor inside RF equipment may be caused by a primary electron accelerated by an electric RF field which...
Finding the isomorphic graph is the problem that have algorithms with the complexity time. For this in general, because of classification for algorithms time complexity, this solution stay in NP-complete group. In this essay tried to show the new style for DNA algorithms, until decrease the solution of the problem in vast. This style heel show to exploit of graphs Adjacency matrix representation,...
The teaching appraisal must be done every semester in most of the universities. There are large amounts of data accumulated. In order to find out the relevance between individual background of a teacher and his teaching performance, this thesis introduces an algorithm based on multidimensional Association Rules Mining, which has explored teaching defects when there are the individual differences and...
In traffic flow procedures the inference of macro environment to vehicle powers shows a complicated behavior. To this end, it presents an imaginary slope based model for the purpose of car following modeling. The imaginary slope applied takes the shape of the deflection curve of a built-in beam. The up limits of car velocities are supposed to be related to the macro car density. A large scale simulation...
Covered-uncovered problem and noise interference are key problems in optical flow estimation of nature scene images. In this paper, the visible scene areas are labeled by visible matrix and the distribution of noise is approximately described with normal probability distribution. The arithmetic expressions of optical flow field in visible scene areas are deduced in the Bayes framework. The results...
This paper applied the contact principle of deferential geometry in to the 5-axis NC machining, researched the best contact condition of tool and the surfaces, analysis the contact degree of the intersection line of the cutter and the surfaces. Compared with other references, the theory of this paper is more restrict, going deep into the parameter of third order instead of the second order, suitable...
Evaluation function is an important item to measure the quality of images in auto-focusing systems. This paper introduces four categories of evaluation functions which are respectively based on gradient, correlation, statistics and transform. These functions formally differ from each other and their performances are not consistent when dealing with different images. The same function also performs...
Many time series database applications require processing and analyzing database sequences where the focus is on finding the patterns and trends in sequence data. In this paper, we propose a new approach based on the observation that finding sequential patterns in databases is somehow similar to searching for a phrase in the text. However instead of searching for sequence of letters usually from finite...
This paper proposes a vehicle-oriented forecasting rules algorithm based on the Data mining Multi-dimensional association theory, according to the task scheduling experiences, which made the system to forecast the data flows and to raise the ability of the dynamic priority algorithm, to the data jammed situation where data flows is huge and transfer networks are not planned properly. Experimental...
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