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Bipolar DC system provides flexible connection and decreased line-to-ground voltage level at the expense of potential voltage unbalance between positive pole and negative pole. Voltage balancer works as “Dependent Voltage Source” to eliminate the unbalance voltage. It is a critical grid-forming component for bipolar system. Considering the need of system expansion and “N+1” redundancy design, bipolar...
IP fast reroute is a mechanism that is used to reroute packets around a failed link as soon as the link fails. Most of the IP fast reroute mechanisms, that have been proposed so far, focus on single or dual link failures but can not handle Shared Risk Link Group (SRLG) failures when several links fail at the same time because of some common underlying component failure. Furthermore, most of current...
Feedback structure is an efficient topology for noise-reducing in analog circuit while the cyclic circuit has been widely used in digital circuit only to establish sequential circuits due to its data-keeping property. The Markov Random Field (MRF) based circuit is proposed with feedback structure from the point of energy, which has high noise-immune property in ultra-low supply voltage. However the...
Multi-MW wind power converters are widely applied in wind power field. Converters are paralleled to expand converter's capacity. Due to the wind power fluctuation, IGBT's power handling ability together with its drive power is fluctuating largely and rapidly, which will cause a large temperature variation, affecting the reliability and lifetime of power semiconductors. In this paper, the thermal smooth...
Extracting product aspects and their associated sentiments is one of the key tasks in sentiment analysis. Estimating the confidences of extracted aspects is important to ensure the performance. To tackle the issue, this paper proposes a two-step estimation method. Collocations of product features and opinion words are initially extracted through pattern bootstrapping. A criterion synthesizing two...
Wind energy is one of the most important renewable energy sources for its clean and sustainable characteristics and has become an important part in the sustainable development strategy of the world. However, with the wind turbine capacity enlarged and the increasement of wind farm scale, the fault management issue aims to the wind farm has become increasingly prominent. This paper provides an agent-based...
In applications of permanent magnet, the calculation for magnetic flux intensity is of primary importance. The magnetic dipole is simple mathematic model which is used frequently. However, it is required that the evaluation points are far from the magnet; otherwise, the measured data is wrong. An approach of calculating the magnetic flux intensities at those points which are very close to the magnet...
Strategic human capital as the unique resources brings competitive advantages for enterprises, which is unquestionable. Because of different strategies at business level, strategic human capital characteristics are different. This paper, firstly, through exploratory factor analysis surveys the strategies at the business layer of 435 enterprises, two different types of enterprises under the cost leading...
Data association is one of the key issues in SLAM. Against the accuracy of NN data association is low, but its efficiency is high and JCBB data association have high accuracy, but its efficiency is low, a hybrid data association strategy is proposed. At first NN produce an assumption H, according to conditions to decide whether we correct it or take what kind of corrective actions to get new assumption...
Abstract-Consumer trust has been more and more recognized as an important factor for a successful e-commerce vendor. Based on the previous research, this paper developed an extended model for analyzing the main attributes of trust of the users in China. A survey regarding the trust of e-commerce users is conducted to empirically test the model. The result shows the perceived reputation and size; the...
In order to solve the communication conflict of the mine personnel positioning system, clustering protocol is employed, in which the node receiving the strongest signal is selected as the new head of the cluster and the members are selected based on the method of RSSI similarity and neighbor node K. Simulation on clustering protocol was performed using the software MATLAB. It indicated that the speed...
The black box between High performance work systems(HPWS) and organizational performance is an important issue in the domain of Human Resource Management. Scholars strive hard to uncover it. After 2007's financial storm, they try to uncover it from the perspective of human resource flexibility which stems from the practices of HPWS and thereafter turns out to be organizational performance through...
Based on the geometrical theory of the reliability index and taking advantage of an improved particle swarm optimization with simple parameter setting and high convergence speed, a movement precision reliability computation method of the main motion of internal combustion engine is presented. The proposed method avoids the partial derivatives calculation in the performance function, and it is suitable...
In the traditional flatness pattern recognition neural network, the topologic configurations need to be rebuilt with a changing width of cold strip. Furthermore, the large learn assignment, slow convergence, and local minimal in the network are observed. Moreover, going by the structure of the traditional neural network, according to experience, it has been proved that the model is time-consuming...
Classification algorithm is a kind of important technology in data mining, and the most commonly used is decision tree learning. In the process of constructing a decision tree, the selecting criteria of splitting attributes will directly affect the classification results. And the attribute selection of the traditional decision tree algorithm is based on information theory. In this paper, by combining...
In order to increase the strength and reliability of the globoidal cam mechanism, the surface equation of the globoidal cam is deduced based on the mesh theory and differential geometry. The expression of the induced curvature of the globoidal cam are derived, the calculation model of contact stress of the globoidal cam and roller is presented, and the design and check methods of static and fatigue...
The objective of this research is to apply content analysis and decision tree criteria to analyze unstructured customer data. Base on this analysis, the hidden customer knowledge is discovered and a customer relationship management models is proposed. This could provide the best service model owing to the enounced of customer-orientation and making more effective marketing strategy. Finally, a case...
This paper proposes a new methodology of reliable linear quadratic control for singularly perturbed with actuator failures. The controller is given in terms of the solution of a set of inequalities. An algorithm is proposed to solve those inequalities through the LMI (liner matrix inequality) formulation. An example is given to demonstrate that the designed controller can guarantee the system performance...
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