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The fatal accidents of mine hoist, such as cage jam and rope slack, can't be prevented effectively at present. In this paper, we propose a stress wireless monitoring system based on ZigBee communication technology in order to monitor the mine hoist by measuring the sheave wheel stress. First, we design. The system includes two parts: the data collector and controller, which monitor and transmit the...
Portable fixed-wing Unmanned Aerial Vehicles (PUAV) present enormous potential. In order to develop a robotic PUAV with significant levels of autonomy, the flight control system is studied. The platform is introduced and dynamics model is studied firstly. Then the infrastructure hardware and the architecture of the flight control system are detailed. As the core of the flight control system, the attitude...
As service robot, the cleaning robots for vertical type air-conditioning duct are studied in recent years. The detection system based on machine vision is a key component in the robot controller design. An effective method based on histogram similarity principle which is used in the machine vision is studied in the paper. Firstly, the configuration and workflow of the machine vision system is presented...
In order to improve the safety and the reliability of mobile robot, a method for the path planning and the obstacle avoidance is provided based on distance information that laser radar offers. The method used the improved artificial potential field (APF) and set up the real-time variation polar coordinates, whose centre was the place that the laser radar installed in. In the polar coordinates, the...
In order to optimize the processing of complex multi-product flexible scheduling, a simplified method which converts complex multi-product into a virtual single-product is adopted. The complex multi-product flexible scheduling problem is transformed into the virtual single-product flexible scheduling problem. Aiming at the virtual single-product flexible scheduling problem, an integrated algorithm...
A composite controller is designed based on singular perturbation model of two manipulators handling a flexible payload with external disturbances and parameters uncertainties, where an adaptive sliding mode controller is presented for the slow subsystem. The control algorithm can realize trajectory tracking control in the large range and update some values of parameters effectively, comparing with...
In order to improve the transmission velocity in mulitipath fading wireless channel, the high speed OFDM technology receives increasing attentions in mobile communication. Modulation programs are designed with VHDL based on the principle of OFDM in the paper. First, after OFDM fundamental is introduced; two main advantages are obtained via discussing spectrum utilization ratio of OFDM. Then, from...
It is found that ontology merging is the most effective way to solve the problem of ontology heterogeneity in distributed environment which can hinder the inter-operability of the services by using ontology to describe Web services and merged ontology can provide a good basis for the inter-operability of services. To solve this problem, firstly a framework for multi-mapping based ontology merging...
This paper presents a new type for detection of spiral bevel gears by using machine vision technology. It is a high efficiency, high precision and non-contact detection system. The concrete method is shown as follows: Cameras were calibrated with improved Tsai two-step method. Then, the two cameras in two different orientations taken gear images. After matching the two images robustly, using correspondence...
A novel video smoke recognition method based on optical flow is presented. The result of optical flow is assumed to be an approximation of motion field. The method is proposed as following, first, moving pixels and regions in the video are determined by a background estimation method. Then, a pyramidal implementation of the Lucas Kanade feature tracker is proposed to calculate the optical flow of...
Focusing on the problem of resource allocation under large-scale, distributed, autonomous, heterogeneous and dynamic environments in grid computing, a heuristic algorithm combining fuzzy clustering with application preference is proposed. Fuzzy clustering method is applied according to a group of features, which describe the user's application preference, to realize reasonable pre-classification resource...
According to the circulation process of financial indicators flow, data flow, capital flow involved in financial supervision work, based on the financial data center, designs a five-story architecture for the system including monitoring and analysis of budget preparation, monitoring and analysis of budget adjustments, monitoring and analysis of budget implementation, monitoring and analysis of accounts...
In this paper, we present a new Neighbor Sharing Selection based Agglomerative fuzzy K-means (NSS-AKmeans) algorithm for learning optimal number of clusters and generating better clustering results. The NSS-AKmeans can identify high density areas and determine initial cluster centers from these areas with a neighbor sharing selection method. To select initial cluster centers, we propose an agglomeration...
The definition of vaccine, vaccine autonomous obtaining algorithm, vaccination operator and evolution of vaccine library are proposed in this paper. The generic clonal selection algorithm is improved by integrating with vaccine autonomous obtaining and vaccination operator, whose purpose is to accelerate the convergence speed of clonal selection algorithm, and improve the efficiency of the algorithm...
A high-speed, real-time method of CCD Image data storage system is introduced. It integrates data acquisition and storage into a single FPGA chip. A SATA controller is designed in VHDL based on the protocol SATA 2.6 and implemented by using the GTX in V5FX70 series FPGA. If several disks are combined to RAID, the CCD data can be stored into SATA disk parallelly with the virtue of high speed, real-time,...
It is the basis for higher levels of benefits that whether a Public transport enterprises can allocate reasonably. During the bus business operations, the phenomenon of peak lack and pling peak idle of vehicle resources, results in a lower quality of service, passenger satisfaction is not high. In this paper, wavelet analysis and neural network methods are used to study the distribution of passenger...
Effective signal processing technology should be used to improve signal-to-noise ratio in air-coupled ultrasonic testing, because of there is feeble signal and low signal-to-noise ratio. Pulse compression of linear frequency modulation could enhance system's signal to noise ratio and distance resolution effectively. Principle of linear frequency modulation pulse compression is introduced, including...
Wavelet multiresolution analysis allows us to detect edges at different scales, also to obtain other important aspects of the extracted edges. However, due to the usual two-dimensional tensor product, wavelet transform is not optimal for representing images. The main problem in edge detection using wavelet transform is that it can only capture point-singularities, and the extracted edges are not continuous...
KNN algorithm is particularly sensitive to outliers and noise contained in the training data set. In this paper, we use the reverse cloud algorithm to map the training samples into clouds. Each attribute is mapped to a cloud vector. Reverse cloud algorithm is not sensitive to the noise on data sets and it can eliminate the impact of noise on classification effectively. By comparing the similarity...
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