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Aspect extraction is one of the most important tasks for text mining. Semi-supervised methods have been proposed to solve this problem. However, the seed terms have to be given in advance in these methods. The current methods categorize the aspects without expanding more aspects terms. And most of the methods are based on English corpus, there is a great space for the research on the aspect extraction...
Sentiment analysis uses NLP (Natural Language Processing) technology to analyze people's sentiment or opinion. SA can treat the subjectivity, sentiment and opinion of text by calculation. In recent years, because a large number of opinion appear in web such as discussion forum, review sites, blogs and news sites, sentiment analysis has become an important research area. In this paper, we designed...
A data fusion approach based on eigenvalues and eigenvectors of relation matrix of multi-sensor is proposed. Features of relation matrix are extracted and the information of relation matrix is fully utilized by eigenvalues and eigenvectors of relation matrix. This approach overcomes the problem of influenced by expert experience in threshold settings by the optimal sensor group selected through fusion...
Qualitative rules mining and reasoning is one of the important aspects of data mining and knowledge discovery. Backward cloud can transform quantitative values into qualitative concept naturally, and the rule generator constructed by cloud model can describe qualitative rules expressing by natural language effectively. In this paper, we employ backward cloud to obtain qualitative rules from a small...
The number of delayed passengers forecast is a key factor to improve the efficiency of airport facility in emergency situation. But it is rarely considered to make a forecast beforehand based on a scientific method preparing for dealing with this kind of event in the future. Aiming at this problem, this paper proposed a forecasting method based on time series analysis. The method provides a relatively...
This paper proposes an image enhancement algorithm based on fuzzy theory. The average of all adjacent points is as enhancement threshold and affiliation of each point is obtained by counting the average. Then, enhancement images are obtained with inverse transformation. Experiments have proved that contrast of vein and background is enhanced and effect of image segmentation and extraction is improved...
The design status and existing problems in Bulk-cement Delivery Tankers were studied at first, and then the importance to construct the Rapid Design of Bulk-cement Delivery Tankers was discussed. Based on variant design, the rapid design system of bulk-cement delivery tankers was proposed, and the architecture and the key implement of this rapid design system were expounded. Research and practice...
Vibration signals which carry the dynamic information of the machines are frequently used for mechanical fault diagnosis. Impulsive modulated signals often generated by the defected gear and how to extract the impulsive components from the raw vibration signal with strong background noise has become the most important tasks for gear fault diagnosis. An adaptive multi-scale morphological gradient (AMMG)...
A new method for electric heating cable fault testing based on BP algorithm was proposed in this paper. The design process of a useful neural network was described and the principle chart of the detecting system was given. Experimental results showed that the method based on the neural network could be used to improve the effectiveness of locating the fault point of the electric heating cable.
This paper is mainly concerned with coupled map lattice (CML) of the form xm+1,n=(1-epsiv)f(xm,n)+0.5epsiv{f(xm,n-1)+f(xm,n+1)} where f:RrarrR is a continuous function and misinN0={0, 1,hellip} and nisinZ={hellip, -1, 0, 1,hellip}. A new definition of chaos on recurrent points set in discrete spatiotemporal systems is given and one sufficient condition for this system to be distributionally chaotic...
Based on the single-open-chain method, a systematic and effective design process for structural synthesis of the 4-DOF (3T1R) parallel manipulator is given. And 12 promising 3T1R parallel manipulators with lower coupling degree are presented originally in this paper. Then, these manipulators are deliberately classified according to topological symmetry, the coupling degree, structure simplicity and...
This paper aims to provide the theoretical design of a special type of modular reconfigurable robot system (MRRS) with locally chain-based topology: the motion type reconfigurable robot (MTRR). Different from the existing industrial robots which are designed to perform general task, The modular reconfigurable robot system can provide diversity and optimal robotic configurations to be suited for specific...
This paper presents a B-spline surface interpolator aiming to generate tool path for precision machining of free-form surfaces. For simplicity of implementation of the proposed surface interpolator, iso-parametric machining method is adopted. Parametric interpolation based on Taylor's expansion is used along the tool path and also in the path interval direction for better surface quality and improving...
This paper presents the framework to support the interoperability among different Web Service Registries (WSRs). The current degree of interoperability, which is now at the syntax level, cannot ensure the cooperation among WSRs. Therefore, it is important to enhance the degree of interoperability for improving the flexibility among WSRs. As a solution to the problem of interoperability, we rely on...
This paper mainly research the probabilistic planning problems based on the creating or destroying objects. Firstly, a new definition on mutex inference is given, because the objects can be created or destroyed and the actions are uncertainty. We adopt the thought of transforming object into proposition. Secondly, we propose a new concept of concurrent action set and give the algorithm for creating...
In this paper we overcome the restriction of conventional integrators and present a unified framework for general integral control (GIC). The necessary conditions and basic principles for designing a general integrator are proposed. All asymptotically stable controllers in conjunction with the limited conditions described can be directly used as integrators and all techniques for designing these controllers...
Formal description of network behavior is the important part in network management. But some problems have not yet to be adequately addressed are the semantic and behavioral aspects of composition in this domain. Therefore a formal description method was presented to network behavior. The method includes a simple formal language, and its semantic was described by CSP. The formal language has graphical...
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