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Efficiency of MAC (media access control) is one of important issues of power line communication (PLC). There exists efficiency problem in current CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) mechanism of large-scale PLC network. Aimed to solve this problem, a Cluster and Probability Competition Based MAC (CP-MAC) mechanism is presented to improve the MAC efficiency, in which the...
Credibility is an important part of combat simulation research, which restricts application qualities of simulation in the operational decision-making. Most of credibility evaluation methods measure the credibility by analyzing gap between simulation results and actual results, but the actual results of combat cannot be predicted. The paper brings forward a credibility evaluation method based on event...
As the distributed energy is environmental and renewable, micro-grid (MG) has attracted widespread concern since it is raised, and it is becoming the future direction of the power system. In order to connect MG to the grid and make it available to loads, the power quality must meet the requirements set. In that case, energy storage and filtering is two main ways to achieve the goal effectively. This...
A new tracking scheme with the three sine parts controlled independently from each other is presented in this paper, by using this scheme, the switching signals of the three phases can be acquired at the same time, it can track any given magnetic flux to control the flux. By comparing the tracking and contrast, the switching state of each phase can be acquired, and combine the switching state of phase...
The Social relationships of the pedestrians plays a vital role in crowd simulation, not only in the emergency circumstance but also in normal situation, which has been neglected in many researchers' study. The relationships among the crowds not only affect the modeling of the crowd simulation but also the pedestrian's behavior model. Additionally, social network provides a way of analyzing these pedestrians...
This paper presents an overview of emerging neural network (NN) modeling techniques for electromagnetic (EM) structures. Techniques including NN modeling for frequency and time domain simulations, NN inverse modeling, and NN modeling for EM-based simulations are discussed. NN models for EM structures are developed by training the NNs with EM data generated from either frequency or time domain EM simulators...
In this paper, high-rate coded continuous phase modulation (CPM) schemes are investigated using the puncturing method. With Rimoldi's Decomposition, the high-rate channel encoder over rings cascaded with the continuous phase encoder (CPE) can be treated as an overall encoder. Some typical low rate code generators and corresponding puncturing matrices with maximum normalized minimum squared Euclidean...
For aeronautical static converter then three-phase unbalanced load, made use of four-leg three-phase main circuit topology solution based on abc coordinates of the three-dimensional vector control, so that the switch to select the vector and duty More than a simple calculation, a significant reduction in the modulation of the complexity of the algorithm. The simulation results show the correctness...
The problem of find the location of a node in wireless sensor networks has been a research interest in recent years. However, traditional range-based localization methods for wireless sensor networks usually can not achieve high localization accuracy, when the number of labor anchor is less than three. In this paper, we propose a novel range-based distributed localization algorithm based on genetic...
Spectrum sensing is a critical phase in building a cognitive radio network. However, when the number of cognitive user is very large, the bandwidth for reporting cognitive users' sensing results will be insufficient. In this paper, we propose a new cooperative spectrum sensing algorithm to alleviate the bandwidth problem of reporting channel. Compared with conventional method, only the cognitive users...
To polish a large scaled free-form surface using a small mobile robot is a new idea in the field of mold manufacturing. However, along with the application of this innovative concept, path planning of the robot becomes an inevitable but hard work because of the complex free-form surface of mold. According to the actual dimensions of the designed small mobile robot, a path planning method that based...
With size and pitch of the solder pad decreasing, solder bridging become one of the most common and critical defect in the high-density assembly process. Optimized geometry of solder with its pad is the guarantee of manufacturing process. By means numerical simulation technology, the wetting behavior of SnAgCu solder liquid on structured surface consisting of solder pad and solder mask was investigated...
A new background subtraction algorithm based on two thresholds sequential clustering is proposed in this paper. First, pixel intensity in period of time is classified based on two thresholds sequential clustering. Second, merging procedure is run to classified classes. Finally, the backgrounds of scene are selected, so the background model can represent the scene well. The simulation results show...
Based on the assumption that background appears with large appearance frequency, a new background reconstruction algorithm based on modified basic sequential clustering is proposed in this paper. First, pixel intensity in period of time are classified based on modified basic sequential clustering. Second, merging procedure is run to classified classes. Finally, pixel intensity classes, whose appearance...
This paper presents a method to reconstruct the working scene of the humanoid robot BHR-02 teleopreation. A virtual robot interface is built to render the data of the real robot. It has the same DOF configuration and the same size scale as the real robot. A simulation module is designed to generate the ideal motion sequence data of the robot executing the operational order. Based on the multiple feedback...
Most existing teleoperation system for humanoid robot by using the video camera does not fit to the poor visibility situation. Also a visual instruction prediction interface can give operators the preview of the operation instruction result which is useful for the complex task and the operator training. This paper presents a method to reconstruct the virtual scene of the humanoid robot teleoperation...
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