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G3-PLC technology is the new generation technical specification, which has many advantages such as low rate, high reliability and strong anti-interference ability etc. But due to the operating frequency limit, communication failure phenomenon often occurs when being applied to complex medium voltage distribution networks, which cannot guarantee a high reliable communication. Hence a new generation...
The online social network has become an important information transmitting media. Finding the sources of topic on the online social networks (OSNs), which helps us to know the cause of events, to identify the authenticity of the topic and to target the origin of rumors, is very important. However, topic sources locating is difficult because the structure of OSNs is complex and the complete OSNs are...
Single image blind deblurring has been intensively studied since Fergus et al.'s variational Bayes method in 2006. It is now commonly believed that the blur-kernel estimation accuracy is highly dependent on the pursed salient edge information from the blurred image, which stimulates numerous ℓ0-approximating blind deblurring methods via kinds of techniques and tricks. This paper, however, focuses...
The nonparametric blind deconvolution, either single or multi-shot, has been intensively studied since Fergus et al.'s variational Bayesian approach to camera shake deblurring [1]. However, in the current literature there is always a gap between the two highly related problems; single and multi-shot blind deconvolution are modeled and solved independently, lacking a unified optimization perspective...
A zero reaction coordinated motion planning algorithm with a kinematically redundant arm is proposed for the dynamic coupling problems of free-floating space manipulators. As the robot system has a redundant degree of freedom (DOF), different configurations of the space robotic arm can maintain the same end position and attitude. The joint motion resulting in zero disturbance to the base can be generated...
This paper presents the concept of electromagnetic satellite formation flight (EMFF), a novel propulsion mode of controlling the relative motion of satellite formation without propellant consumption. The alternative actuation system utilizes electromagnetic force, generated by the interaction of electromagnets around component spacecrafts, to transform the configuration. The linear equation of relative...
In this paper, we a novel personalized image tag recommendation algorithm based on tensor factorization which is suitable to be used in the Web2.0 Platform. Firstly, the framework of the personalized image tag recommendation system is given, which is made up of three parts: 1) collecting the history of user tagging behaviors, 2) modeling the user interests from the tagging history, 3) obtaining the...
The navigation precision drops rapidly when MIMU (Micro Inertial Measurement Unit) works alone. Odometer data are easy to get on land vehicle, but the performance of integration system of MIMU/odometer is not enhanced obviously. In this work, a novel method is designed using nonholonomic constraints. When vehicle travels without slide and jump, the velocity in the plane perpendicular to forward direction...
The excursion of fractal parameters (box dimension and lacunarity) is the main obstacle to the application of classifiers trained by fractal-parameter-based features. In order to solve this problem, we studied the characteristics of fractal parameters, based on partial discharge ultra-high-frequency signals' mathematical models. One solution to this problem based on Symlets wavelet has been put forward...
The paper proposed a method enable robot to navigate in indoor space is indicated. The system use RFID tags as landmarks to locate the robot. A topological map corresponding to the real environment is used for robot navigation. The robot goes along the ways, and turn to the right direction at each intersection of the hallways. The robot navigation system can be used in real life and do efficient work.
A method in allusion to the arbitrary waveforms source for using Numerical Inverse Laplace Transform (NILT) is proposed in this study. The principle of this method is to consider the arbitrary waveforms source containing of data points as discontinuous functions. By means of the unit step function, the discontinuous functions can be expressed as a unified form, and then the frequency domain expression...
In this work, the proportional navigation (PN) law with gravity compensated based on GPS/INS combination is formulated at first, and a guidance law is designed via Variable Structure Control (VSC). Secondly, as the primary reason of chattering in the traditional VSC, the input Relay-characteristic is improved in order to reduce chattering at the end time, and three continuous functions are given....
The reliability-based analysis of frequency of the vibration control problem of structures with random parameters is discussed. Based on the theory of perturbation method, closed-loop vibration control systems, reliability analysis, and PNET method, the method of reliability-based analysis of eigenvalues of closed-loop vibration control systems with uncertain parameters is studied. And the distribution...
In order to solve the underdamping problem for a rolling missile, at first, design the lateral acceleration autopilot; secondly, study the projection of control command and control strategy called pulse width modulation (PWM) of command in engineering, then design the damping loop for this rolling missile and simulate the control system while inputting step signal. The digital simulation results indicate...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
Alzheimer disease (AD) is the most common form of dementia. To find a way of cure it, gene study is necessary. And gene order is a new conception of gene study currently, where gene order refers to a permutation of genes in which similar genes are ordered together one by one, and optimal gene order can be abstracted as shortest TSP route. Currently only two types of tools are reported to calculate...
In order to improve the performance of HVDC, using adaptive Fuzzy Self-Tuning PI Controller instead of traditional PI controller in the rectifier sides, take the deviation and its rate of the current in the DC Line as the inputs. Then adjusted On-line PI parameters according to the operation condition, and aimed to make the performance of the system is more superior. The DC circuit fault was simulated...
For the short-range rendezvous problem, an approach of time-optimal multi-impulse rendezvous was put forward using hybrid genetic algorithm. Firstly, based on the state transition matrix of T-H equation, the mathematical models of time-optimal multi-impulse rendezvous was established and transformed into a nonlinear optimization problem, In order to obtain the global solution efficiently, a hybrid...
On the basis of grey theory model for medium-long term load forecasting, the paper improves the traditional grey model and brings forth the grey residual forecasting model for less prediction errors. At the same time, it uses fixed weight method of forecasting model--that is to choose weight with average precision of each model to build a optimization combination forecasting model. It forecasts with...
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