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In this paper, the information acquisition problem of columnar moving obstacles is investigated for a quadrotor equipped with a stereo vision system flying in an indoor GPS-denied environment. A acquisition algorithm based on stereo vision is proposed to obtain the position and velocity direction. The spatial position relation between the quadrotor and the object detected is used to remove the interferences...
Current practice for real-time security risk assessment typically takes intrusion detection systems alerts as the only source of risk factor. Their assessment results are more likely to suffer from the impact of false positive alerts in the increasingly complex and severe network security environment. This paper proposes a novel online fusion model for dynamical network risk assessment by using multiple...
In some public places such as super market and school, increasing people became too crowed sometime. In this paper, we find a solution to monitor the video and analyze the data automatically. It helps to get warnings before the people becoming too crowded. In order to acquire the real-time images to analysis the people's movement trends, system sends the warning to administrator in time by calculating...
To solve imbalance problem of datasets in thunderstorm forecast, this paper introduced the concept of data field and proposed a resampling method based on potential value which is combined with the weighted Support Vector Machine (SVM) to set up a new thunderstorm forecast model. Moreover we assessed the forecast model with a comprehensive assessment method based on imbalance measure and meteorological...
According to the sociological principium, this paper designed a model aimed at social networks and implemented it using the multi-agent system. Based on this model, we established a simulation system to research the evolution of colony in the social networks, analyzed the effects on the evolution by the characteristics of individuals and achieved meaningful conclusions.
Display driver is a basic driver of a system, in order to port WINCE to the platform based on e-paper, we developed a E-paper driver for WINCE. This paper analyzed display characteristics of e-paper in detail and compared the Apollo controller with others. Considering the e-paper's refresh rate is too slow, we put forward a specific solution - a passive-refresh display strategy for the display controller-...
The torque fluctuation is the main influence to the high precision speed tracking for the motor-driven flight motion simulator. A plug-in repetitive controller to improve the steady-state precision is proposed. The electromagnetic torque fluctuation analysis and test results are provided in this document.
We propose a novel algorithm based on clustering to extract rules from artificial neural networks. After networks Beijing trained and pruned successfully, inner-rules are generated by discrete activation values of hidden units. Then, weights between input and hidden units are clustered to decrease the complexity of rules extraction. In clustering phase, the clustered number of weights can be adjusted...
Simulations are given for the anti-rolling effects between fin stabilizer, anti-rolling tank control, and fin/anti-roll tank combined stabilization. Results show that the last design strategy gives much better performance than the two single dynamics strategies (fin or anti-roll tank), and can provide us a full-condition anti-rolling system. The nonlinearity and randomicity of the ship rolling motivates...
Intrusion detection system will produce large numbers of alerts, most of which are fasle positives. This paper wants to associate multiple intrusion detection systems in large-scale network to reduce overwhelming false alerts and discover real security events in real time. For processing these alerts, two algrithms named reduce and cluster will be developed in this paper, which can remove false alerts...
A method on circular pattern measurement in wafer fault pattern retrieval system is developed. It can help engineers to query circular wafer fault pattern to historical or other patterns for manufacturing fault detection and tracking. An enclosing polygon based on the vertices of boundary edges is constructed to describe the border of circular pattern. Experimental results show that the proposed approach...
Data envelopment analysis (DEA) is an important way of data mining. In this paper we show that the inverse data envelopment analysis (IDEA) model can be used to estimate inputs for a decision making unit (DMU): if among a group of decision making units, we increase certain outputs to a particular unit and assume that the DMU maintains its current efficiency level with respect to other units, how much...
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