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In this paper, we discuss a system consisting of two redundant robots and one safety unit. Formulate for reliability indices of the studied system are presented. A numerical example is given to illustrate the results obtained in this article.
Aiming at the disadvantages of genetic algorithms (GAs), such as slow convergence, easy prematuration and so on, in finding optimal PWM switching sequence of inverters. This paper proposes an improved immune genetic algorithms (IGOAs) to optimize the switching sequence of inverters by using the integral of square of the difference between output current and sinusoidal reference current as objective...
As an intuitive human–computer interaction, hand gesture recognition has attracted a lot of attention in computer vision. This paper presents a novel method for real time gesture recognition, which first extracts hand skeleton by propagating wave starting from the maximal inscribed circle of the hand palm, then refines the skeleton using the least square fitting method. We propose angle feature vector...
Pavement crack detection plays a vital part in highway maintenance and management. It is difficult to detect cracks effectively and accurately through ideal detecting algorithm. This paper improves the pavement crack image processing algorithm from the angle of grey level transformation, median filter and image intensification according to the characteristics of the pavement crack image. Based on...
Localization is one of the crucial issues in current mobile wireless sensor networks (MWSNs). And localization algorithms for MWSNs can be classified as range-based and range-free. In this paper, we propose an efficient range-based localization (RBL) algorithm for MWSNs. And our method is based on the MCL method. The RBL algorithm is divided into three phases: prediction, filtering and computation...
In big data era, service scheduling process, analysis of credibility and functional data acquisition is very important, so, this paper starts from dissecting the data features, the variation function is employed to fit the features of data isomerism and to draw the scattered point cloud of data space distribution, therefore, to incorporate the messy service nodes of space into the cloud service logic...
Regular expression has developed a lot since it was invented in 1950s. There are many application scenarios fitting to use regular expression, like string search, string match and so on. The reason why it is so popular is that regular expression has a powerful processing capability to deal with undecided format string. When it comes to advertisements filtration, the regular expression can work well...
Organization should focus on how to implement effection mechanics of knowledge reuse so as to improve its core competitiveness under the era of big data. The maturity of semantic web technology has brought new opportunities for knowledge reuse. First of all, through the semantic description to achieve the relationship between the characteristics of the parts, the capture of attributes. Secondly, construct...
The paper presents the reasonable environment cognition model for multifunction radar based on time-frequency analysis and fuzzy Support Vector Machines (SVMs). Aim to extract the signal modulation characteristics corresponding to different multifunction radar task, the Smoothness Pseudo Wigner-Ville distribution and kernel principle component analysis are proposed to extract features of radar signals...
With the application of Internet of things in the field of transportation, the requirement of traffic control and safety management is increasing, the intelligent transportation has become the main direction of traffic management. License plate recognition technology is the application of video image recognition technology, and it is an important part of intelligent transportation system. The movement...
This paper addresses the distributed control problem of multiple Unmanned Aerial Vehicles tracking a three-dimensional trajectory. Each vehicle only interacts with its local neighbors through switching interaction topology. Three related sub-problems are discussed in a unified control scheme: the distributed trajectory tracking, the trajectory tracking with input saturation, and the trajectory tracking...
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