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This paper develops a robust vision-based mobile manipulation system for wheeled mobile robots. In particular, the paper addresses the retention of visual features in the field of view of the camera, which is an important robustness issue in visual servoing. First, the classical approach of Image-Based Visual Servoing (IBVS) for fixed-base manipulators is extended to wheeled mobile robots. Second,...
Based on wireless sensor network, this paper discussed the methods to estimate acoustic source location with the energy received. Multiple resolution (M-R) and Tabu heuristic algorithms are expounded in details. Then, a new algorithm is proposed to attain the balance between accuracy and calculation complexity. Comparison among the different methods was made according to simulation data and curve...
With the description of the multi-layer switch and qos principle, we introduce the flow classification technology to implement QoS and put the implementation way and workflow. Then we introduce the experiment steps and the result and give related analysis.
A new shield - double partiality shield is introduced. Shield structure is optimized according to genetic algorithm. The partiality radius, length and diameter of hydraulic cylinders are all important parameters for shield structure. The author established multi-objective and multi-constraint genetic algorithm, coded with the real number. She also established fitness functions, accounted with Matlab...
The appearance of layer-3 or upper layer switch, can solve the problems of low forward rate, high delay of traffic that needs to cross networks, so how to implement VLAN-IP in network device with embedded system is a hot problem. This paper introduces layer-3 principle, character and implementation in embedded system.
Particle swarm optimization is an excellent algorithm solution for nonlinear, non-differentiable problems. It has strong global search ability, but in the process of looking for the global excellent result, it is easily turn into slow speed and precocious. BP neural network also has strong nonlinear approximation ability, but its nature of gradient descent algorithm determines that it's easy falling...
Computer virus scanner is a vital approach to deal with computer virus. However, current static scanning techniques for virus detection have serious limitations. Motivated by a recent success in Computer Immune Theory and N-gram text classification method, an immune inspired obfuscated virus detection model is presented, which is referred as IOVDM. In IOVDM, N-gram analysis is applied to automatically...
Photo-multiplier tube is the key of photoelectric conversion subsystem of light detecting and ranging. When it is exposed in an intensive light, the response of PMT systems becomes nonlinear, that is, the output count rate is no longer proportional to the incident light intensity. A nonlinear effects caused by the intensive light are analyzed in this paper and the errors induced by the nonlinear effects...
According to the characteristics of coal mine environment, in this paper we propose a multi-parameter wireless sensor network monitoring system based on Zigbee technology for coal mine tunnel. The system can real-time monitor the underground environment and production parameters and intelligently give early warning by using a variety of sensors and wireless sensor network. It is flexible to add sensors...
According to energy trap theory and finite element analyze, we plated several electrodes on the same quartz substrate. And a multi-electrode quartz crystal resonator is created. We study the force-frequency characteristic of resonators and output of slip frequency on different positions of quartz substrate by adding radial force. Simultaneously the resonator vibration state stability of this kind...
Many natural records exhibit multifractality characterized by the width and maximum of the singular spectrum. This paper study, how the return intervals of the Hang Seng Index affects the characteristic of the spectral function. We find that the multifractality of the financial time series is similar to the property of the return intervals obtained by small threshold q. Although the multifractality...
The rapid development of World Wide Web has dramatically changed the way in which information is managed and accessed. The information in Web is increasing at a striking speed. At present, there are more than 7,500 terabytes of information in Web. Web information has covered all domains of human activities. This opened the opportunity for users to benefit from the available data. So Web is being concerned...
The control of the temperature and the heating time of the reaction liquid are the keys in the processing of preserved Chinese gooseberry. It has expounded the basic thought of fuzzy controlling by study of the methods on the temperature control of the heating tanks. It has given a more detailed introduction, focusing on the design methods of fuzzy controllers on temperature control, putting forward...
This paper presents a simulation model for passenger walking behavior considering the circumstance and interactions of passengers in transport hubs. The potential field concept is introduced to the modeling. Two categories of potential fields: circumstance potential field and individual potential field are defined to provide access to model the passenger decision process influenced by facility arrangement...
Grey system theory can effectively deal with incomplete and uncertain information. The grey model (GM) is the core of grey system theory, which collects available data to obtain internal regularity without using any assumptions. To further improve the precision of the prediction, this paper proposes an optimized GM(1,1) (OGM), which improves traditional GM(1,1) in two aspects: one is to improve the...
In the process of automobile braking force detected there are a lot of questions at present, mainly including low sampling frequency, big measure error and other problems. A new-style fully-automatic automobile braking performance measure and control system is designed in paper, it is based on a double-sheet structure consists of complex programmable logic device CPLD and single-chip MCU. The detection...
It is believed that the excessive multifarious preventing measures are useless in tunnel. In this paper, depending on the analyses on the fire classification of tunnel the development law of different fire airflow, some correlative preventing measures are proposed by the requirements of currently road tunnel. They includes the requirements of aeration wind speed, the setting of vent of smoke, the...
Inspired by the diffusion movement phenomenon of the molecule, a molecule-diffusion particle swarm optimization (MDPSO) is presented. The proposed algorithm (MDPSO) has attraction and diffusion phases. Once the diversity of population become low, the individuals will be dispersed and turn into diffusion phases, while if the diversity of population get high, the individuals carry out the attraction...
In the paper, we will introduce a new approach of pattern recognition theory. In the control of power systems, the prerequisite of protection device's accurate, fast and reliable performance is its corresponding fault type and fault location can be detected quickly and defined exactly. In our researches, global information will be introduced into the backup protection system, basing on linear discriminant...
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