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We study the information rates of several unipolar orthogonal frequency division multiplexing (OFDM) schemes in discrete-time Gaussian optical intensity channels under average optical power constraint. All our results are derived under the assumption that i.i.d. complex Gaussian codebook ensemble and nearest neighbor decoding (minimum Euclidean distance decoding) are used. Results for single-component...
The introduction of aluminum shielding incurs eddy current effect, which weakens the self-inductance of transceiver coils. Simulation and experiments are carried out to find optimal shielding position to realize efficient and fast charging.
The model of mismatched transceiver coils in wireless power transfer system is proposed in this paper. System transmission efficiency and transferred power are analyzed against coupling coefficient. The mismatched charging scenario and ways to achieve optimal charging are investigated based on theoretical analysis and validated by experiment results.
Predicting the High Intensity Radiated Field (HIRF) coupling in complex system is highly required in the aeronautic industry, which can be performed by electromagnetic simulation. But the validation of electromagnetic simulation is a difficult issue which needs proper flowchart and validation methods. In this paper, the numerical simulation by the parallel Finite-Difference Time-Domain (FDTD) method...
In the data-driven framework of fault detection system design, both faults and normal conditions can be viewed as different patterns and thus can be distinguished by ways of pattern recognition. This paper first generates four data sets by means of simulation and then deals with three kinds of faults in the ship propulsion system through softmax classification, which is a widely used method in multi-class...
We study the denoising performance of several graph wavelet filter banks and image modeling with graph to enhance understanding of the relationship between graph signals and underlying structure. We design a new metric for measuring graph structure similarity (GSSIM) to evaluate those methods. GSSIM is positively related to PSNR as an index of corrupted signal with an additive Gaussian noise in the...
This paper presents the thermal analysis of a permanent magnet synchronous machine (PMSM) which is applied for high speed train. An accurate method to calculate the temperature distribution of the PMSM is proposed here based on 3-D finite element method and multi-field coupling theory. The loss in electromagnetic field and the velocity in the fluid field are figured out separately, and then loaded...
Our group recommender system was targeted at a scenario that requires the adoption of group recommendation techniques to conserve computational resources. The profile aggregation strategy was used in our work to implement this group recommendation system. Key to our work, user clustering is also the first step of our work. The accuracy of user clustering could be improved once we processed the data...
In this paper, we address adaptive predictor feedback design for a simplified drilling system in the presence of disturbance and time-delay. The main objective is to stabilize the bottomhole pressure at a critical depth at a desired set-point directly. The stabilization of the dynamic system and the asymptotic tracking are demonstrated by the proposed adaptive control, where the adaptation employs...
The Wangfeng-Tianger-Saridala gold district consists of over 20 ore bodies and occurs in the EW-trending Tianger shear zone in the western Tianshan Mountains. Shear zone-controlled old mineralization occurs in mylonitized granites and mylonitized sulfide — mica — quartz veins. The ore bodies are composed of gold — bearing mylonitized granites and gold — bearing sulfide — quartz veins in the central...
A user side integrated energy system (USIES) can supply energy in accordance with user demand, in order to make full use of terminal energy conditions, improve energy efficiency, and promote consumption of local renewable energy. A bi-level programming model of USIES multi-objective coordinated planning is developed based on the chance constrained programming. Multi-state models of wind turbine (WT),...
Detailed in this paper is a new approach of wireless charging to electric vehicles for better charging characteristics. The frequency tracking and duty cycle modulation is combined to improve the circuit power factor and ensure constant-current charging. Analysis is mainly carried out using equivalent circuit model based on equivalent resistance of storage battery. Simulation and experimental results...
Gait analysis has many clinical applications in disease detection and treatment evaluation. Gait cycle segmentation is a critical component in gait analysis for timing the gait phases in evaluating many movement disorders. Computer vision techniques have been widely used in surveillance for security monitoring. They are nonintrusive and do not require cooperation from subjects. In this paper, we propose...
Probabilistic load flow (PLF) is a basic tool for uncertain study. To improve the fitting degree between analysis results and actual situation, a dynamic probabilistic load flow (DPLF) method considering distribution of the random unbalance power is proposed in this paper. Based on the probabilistic characteristic analysis for dynamic random variables, bus injection uncertainties caused by random...
In order to optimize the kinematic and dynamic performance of a 2-DoF planar parallel mechanism used in hybrid machines, a multi-objective optimization method is introduced. Based on the compare of the common kinematic analysis method and dynamic analysis method, the kinematic and dynamic performances evaluation indices which can be used in the performance optimization are introduced. Then a multi...
As the main force of original innovation, the college is the source of technological innovation and the important subject in creating intellectual properties in China. In recent years, colleges in our country are paying more and more attention in intellectual property, what's more, the amount of patent application and authorization volume increased year by year. However, the colleges' management of...
Enterprise-oriented university-industry cooperation is a major mode of Industry university cooperation, rapid development in recent years. But compared with western developed countries, there are still significant gaps. So the theory of enterprise-oriented university-industry cooperation research needs to be strengthened. This article will treat cooperation as process of knowledge flow, relying on...
Knowledge management is the further development of management discipline. Teaching management in colleges and universities is fundamentally the management of knowledge. Building teaching management system based on knowledge management is an inevitable choice in colleges and universities. Starting with improving management execution, this article focuses on ideas and methods on the construction of...
Automatic pain intensity estimation possesses a significant position in healthcare and medical field. Traditional static methods prefer to extract features from frames separately in a video, which would result in unstable changes and peaks among adjacent frames. To overcome this problem, we propose a real-time regression framework based on the recurrent convolutional neural network for automatic frame-level...
In this paper, The Kane Dynamics Modeling and solid model by Adams are established for the 5-DOF modular industrial robot. Dynamics model equations are derived by that the Joints practical input parameters and Kane dynamics method. The Kane modeling is simulated in the Matlab and the solid model is simulated in the Adams. Simulation experiments show that models are effective by the typical mission...
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