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In this paper, a kind of interference on chirp pluses in spaceborne SAR and the corresponding suppression method are introduced. This interference is a kind of multi-component linear frequency modulated (LFM) signal which is difficult to be suppression by classical elimination methods. According to the generation mechanism of interference, the mathematical model is established firstly. Moreover, the...
One of the most challenging problems in aerospace engineering is the analysis of the separation trajectories by which a missile ejected from an aircraft. The attitudes of some static unstable missile are divergent quickly due to aerodynamic interference by the aircraft. Therefore, it is disadvantageous to missile's separation from aircraft safely. The attitude control strategy must be applied to avoid...
The so called Smart Grid is said to be enabled with bi-direction communication networks and energy flow. IEC 61850 is a substation communication standard which improves interoperability of the substation design. IEC 61499 is an automation standard which can be used for implementation of control in IEC 61850 models. This work is utilizing Model Driven Engineering techniques for substation automation...
In clinical pathology screening, scoring based on Immunohistochemistry staining ER, PR, Her-2 and Ki-67 are important indicators for evaluations of recurrence risk of breast carcinoma in addition to histological pathology of grading such as scoring based on tubule formation, Pleomorphism, and mitotic count. In this research, we extend the previous research results developed using a series of image...
In the TDOA location of multi-Radar System, steepest descent method which is the commonly method has small amount of calculation while it's jagged, slow convergence, and the step size is difficult to choose. Although the genetic algorithm could accurately solve the global optimal solution, but the speed of convergence could slow down with the iterative process. The article proposed the TDOA location...
The Software Defined Networking (SDN), an efficient network technology, allows researchers to program their networks to meet different application needs. In this paper, we focus on failure detection services in multiple SDN controllers. We review some classical failure detection services and discuss how these services work. These classical failure detection services have the high mistake rate problem...
The indoor mobile robots have been widely employed in manufacturing and service industries in recently years. However, the conventional simultaneous localization and mapping (SLAM) method is mainly meant for mobile robots with traditional drives (differential drive and Ackerman steering) that have the coupled translation and rotation motions. Hence, the translation error will affect the heading estimations...
In video surveillance, moving object detection has become one of the core techniques to understand video content. Many detection methods exist to detect objects, but cannot effectively compensate for the effect of shadows or incomplete shapes of moving objects. In this paper, we apply image bit-planes and hysteresis thresholding to compensate for the loss of spatial and temporal information. The experimental...
A placer without considering modern technology and region constraints could generate solutions with irresolvable detailed-routing violations or even illegal solutions. This paper presents a high-quality placement algorithm to satisfy technology and region constraints and optimize detailed-routing routability with three major techniques: (1) a clustering algorithm followed by two-round quadratic placement...
The future distribution grid known as the smart grid will become more distributed in both infrastructure and control. IEC 61850 and IEC 61499 are two industrial standards addressing the challenges presented by a decentralized infrastructure. This paper contributes to system engineering of smart grid automation by enabling automatic generation of IEC 61499 control systems from IEC 61850 specifications...
The deployment of electrical charging service network and power distribution network depend largely on the precisely electric vehicle prediction. System dynamics and agent based modeling are adopted in this paper to build the system model of the electric vehicle prediction through the systematic analysis of the various factors which affecting the development of electric vehicles. Case simulation is...
Doubly-fed wind power generator (DFIG) type is the mainstream model of the wind turbine at home and abroad. To study the impact of large-scale wind power grid on power system reliability, it must have accurate model parameter. In the Matlab/Simulink environment, We have set up a simulation model for the wind turbine grid and have got the measured data. The artificial neural network algorithm is applied...
Taking the DSP (TMS320LF2407) as the main control chip, the construction of the platform for electric vehicle battery management system (BMS) is completed in this paper. Then the expanded Kalman filter (EKF) algorithm is combined with the Thevenin battery model through the MATLAB simulation and with which the working status of the battery is simulated successfully. Finally through the simulated test...
For high resolution spaceborne SAR system, the errors caused by straight trajectory assumption and stop-go approximation cannot be ignored. In this paper, an algorithm is proposed to compensate the above errors. First, a novel modified hyperbolic range equation (MHRE) is introduced to describe the satellite's orbit which is more precise than the traditional hyperbolic range equation (THRE). Then,...
State-of-the-art phrase-based machine translation (MT) systems usually demand large parallel corpora in the step of training. The quality and the quantity of the training data exert a direct influence on the performance of such translation systems. The lack of open-source bilingual corpora for a particular language pair results in lower translation scores reported for such a language pair. This is...
A kind of ant colony optimization algorithm based on Petri nets has been proposed to solve the problem of hybrid flow shop scheduling. First put forward the scheduling model of manufacturing system based on Petri net, then improve the traditional algorithm of ant scheduling algorithm. Finally this algorithm is used in a company which produces automotive glass and has the features of hybrid flow shop...
This paper presents implementation of the Distributed Grid Intelligence (DGI) applications such as Intelligent Fault Management and Load Balancing using IEC61499 reference architecture. This enables system level design of distributed applications with a direct pathway to deployment to hardware. The use of IEC 61499 improves scalability, re-configurability and maintainability of automation software...
This paper deals with the problem of azimuth imaging worsening when three-step focusing algorithm fulfills imaging requirements of sliding spotlight SAR with wide azimuth swath. This is caused by spaceborne sliding spotlight SAR spatial variation characteristic: single point target's relatively large range cell migration and azimuth point targets' different Doppler experiences at different azimuth...
This paper studied the evaluation of activation energy(Ea) based on the experimental data from quartz resonators' biased aging and high temperature storage. 5.0 mm × 3.2 mm metal seam sealed quartz resonators were used in this study. To assure the results are trustable, two approach methods were used for Ea evaluation. The first method is data fit by Arrhenius model for biased aging data. The second...
Due to the coupling and nonlinear relationship between processing variables, it is difficult to achieve the comprehensive optimization of injection part quality effectively only by conventional methods. To solve the problem above, firstly some quality indices were extracted according to the quality requirements of the product and a fuzzy comprehensive evaluation formula including the pertinent indices...
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