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Multi-sensor fusion has been extensively studied i information fusion field, and the distributed target detection i one of the most important applications in the multiple sensor detection theories. In this paper, a data fusion algorithm for target detection is proposed based on tree topology combine with the orderly full binary tree and we discuss the optima threshold fusion rule problem. Different...
In this article, we propose a target detection method in wireless sensor networks based on distributed data fusion. Firstly, we introduce a tree topology. It is different from the conventional tree topology, the sensors in our topology are assigned with weights which are proportional to the received Signal to Noise Ratio (SNR), and are arranged orderly. So the Fusion Center (FC) achieves the highest...
Forest canopy density is an important attribute of forest. The correlation of forest canopy density with LANDSAT TM and its derivative data was discussed here. The forest resource field inventory data and simultaneous LANDSAT TM data were used here in Shimian county, Sichuan province, P.R.of China. A lot of derivative data were created from LANDSAT TM data. 1204 forest sub-compartments with inner...
The correlation of forest volume with LANDSAT TM data and its derivative data was discussed here. The forest resource field inventory data and simultaneous LANDSAT TM data were used here in Shimian county, Sichuan province, P.R.of China. A lot of derivative data were created from LANDSAT TM data by vegetation index calculation, principal component analysis, and tasseled cap transformation. 1204 forest...
Remote sensing opens a new method for obtaining forest canopy density. The forest resource field inventory data and simultaneous LANDSAT TM data were used to discover the model of estimating forest canopy density based on remote sensing here in Shimian county, Sichuan province, P.R.of China. A lot of derivative data were created from LANDSAT TM data. 1204 forest sub-compartments with inner homogeneity...
Aiming at the subjective limitations of the traditional condition monitoring and evaluation methods for the power transformer, the condition assessment method of the transformer state based on the dynamic gray target theory is used to evaluate and diagnose the operating condition and the fault mode of the transformer. The probabilistic reasoning mechanism based on the distance measurement is constructed,...
Aiming at the problems of the traditional transformer cooler's control system, the paper developed the intelligent control system of the transformer cooling based on the DCS dual PLC. The DCS and dual PLC's redundancy, the intelligent motor controller, the system's centralized monitoring platform, and the environmental control system achieve the monitoring, controlling and remote status monitoring...
With respect to the conventional hydraulic broaching machine, the all-electric CNC broaching machine has many advantages. This paper combines the digital servo control system, the double ball screw and the linear motion rail to realize broaching for the two workpieces' internal threads of the different rotations and lead distances. The DSP-based full-AC drive control system was developed. The observer...
In view of the shortcomings on synchro-motion of slide carriage in hydraulic broaching machine driven by single cylinder, an electro-hydraulic servo system with dual cylinder is designed and its nonlinear model was presented. Then the theory of taylor expansion to second order of output vector, optimal control and nonlinear disturbance observer designing are introduced, and a nonlinear PID synchro...
According to synchro-motion control of four cylinders electro-hydraulic servo system in steel pipe stacking process, the nonlinear model of the system with external loop and inner loop was presented; Then, for addressing the desired load pressure for every cylinder, a nonlinear cascade controller was put forward with synchronization spatial transformation, quantitative feedback theory(QFT) and control...
To meet the needs of multi-band work of RFID tags, this paper makes use of meandered parallel dipole and symmetric branches to design a triple-band meandered dipole antenna with bandwidth broadened for passive RFID tags. The designed antenna is simulated by electromagnetic simulation software HFSS10.0, the experimental results show that: this antenna covers the RFID UHF frequency band (902∼928 MHz)...
In order to investigate sawing dynamics on band sawing machine, a general dynamic model is proposed to represent the actual system with the dynamics of strain of band saw, mechanism of hydraulic motor with proportional valve and load of sawing. Firstly, an element strain model of band saw along the arc coordinate is established with the elastic deformation theory of closed band saw, momentum theorem...
Based on the conception of relative-degree of differential geometry theory on nonlinear system, nonlinear disturbance decoupling control on travelling crane electro-hydraulic servo system with dual cylinder was studied. Through define relative-degree of disturbance vectors on the nonlinear system, the sufficient condition of system disturbance decoupling was provided. Then a differential geometry...
According to synchronization motion control with four cylinders in steel pipe packing process, nonlinear model of the system was presented. Then a nonlinear cascade controller was put forward. The provided approach integrated synchronization spatial alternation, quantitative feedback theory(QFT) and control allocation theory(CAT) to coordinate the redundant actuator control in external loop; moreover,...
In this paper, in order to deal with the synchro motion of four cylinders in pattern drawing machine, an electro-hydraulic synchro servo system(EHSS) with four cylinders is developed and its nonlinear dynamic model is presented. Based on the theory of taylor expansion, optimal control and nonlinear disturbamce observer designing, a nonlinear PID synchro controller for EHSS with four cylinders is proposed...
Under the background of TDD mode and LTE-Advanced scene, in this paper, we combine physical network coding with relay technology in order to make physical network coding-decode and forward (PNC-DF) together with physical network coding-amplify and forward (PNC-AF) transfer mode can be used to improve network throughput by using interference. Because of the ability to listen to the multi-user relay...
On the basis of electro-hydraulic position servo system(EHPSS) with asymmetry cylinder and asymmetry valve, an unified nonlinear system model was provided to represent the actual system. Then a nonlinear PI predictive control (NPIPC) approach with nonlinear disturbance observing was put forward and was applied to a guide alignment EHPSS of high-speed elevator. Simulation and actual control results...
The variable-speed electrohydraulic drive, which can achieve similar energy efficiency as volume drive system, has some excellent features. But the main disadvantages, which are slow response and poor low-speed performance, limit its development. The energy regulation based variable-speed electrohydraulic drive is a good solution to solve these problems by adding an energy regulation device and a...
On the basis of study on information stream of management of contract, a frame of an information system of management of contract with holistic information is designed. Sale and production forecast is put forward in terms of data mining technique and customer management concept and relevant system is developed. System information includes customer management system, elaborate content of contract,...
The material requisition flow in the warehousing management was studied in the article, and combining the mining algorithm of causal rules, the material requisition based on data mining was developed. The system could fulfill the management requirements of the material requisition process for the enterprise, mine the data of material return and deeply analyze reasons, which can help the enterprise...
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