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2nd Annual Conference on Electrical and Control Engineering, ICECE 2011

作者： Wu, Jun College of Computer Science and Technology Henan Polytechnic University JiaoZuo China

ISBN: (纸本)9781424481637

Based on the present situation of running of the belt on coal mine, researched and developed the adaptive control system of the ground belt of Wangzhuang coal mine, this system can basis on the dynamic load, then predict and implement real-time frequency according to the size of the load, it can run on the maximum load. The control system use the PLC control frequency according to the size of the load, then implement automatic speed regulation and self-adapting control, then run on the optimum speed. This system can raise the level of automation of the coal mine, it can bring huge economic and social benefits, it has high value and broad application prospects. © 2011 IEEE.

关键词： Coal mines

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Study on passivity-based control of voltage source PWM DC/AC inverter

Study on passivity-based control of voltage source PWM DC/AC...

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2011 International Conference on Electronic and Mechanical Engineering and Information technology, EMEIT 2011

作者： Mu, Kun Ma, Xiaoyu Mu, Xiaobin Zhu, Dalei Department of Computer Science and Engineering Henan Institute of Engineering Zhengzhou China School of Automation Beijing Information Science and Technology University Beijing China School of Computer Science and Technology Henan Polytechnic University Jiaozuo China

ISBN: (纸本)9781612840857

The mathematical model of Three-phase Voltage Pulse Width Modulation (PWM) DC/AC inverter is non-linear, in view of the traditional linear control strategy can not meet the requirements of designing high-performance DC/AC inverter, this paper propose a new nonlinear control strategy for this called Passivity-based Control. We can alter the inverter model in three-phase abc coordinate to two-phase synchronous rotating dq coordinate for establishing port controlled Hamiltonian with dissipation (PCHD) model for this system. In view of this method, we can control the output energy of the system. Usually, we can use Single Chip Microcomputer or other kinds of computer with this algorithm for our design, this algorithm can be programmed with the computer language, such as C/C and assembly language, etc. Simulation results show that passivity-based control method can make this system possess the high-performance of robustness and dynamic. © 2011 IEEE.

关键词： Pulse width modulation

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Accurate identification of significant aberrations in contaminated cancer genome

Accurate identification of significant aberrations in contam...

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IEEE International Workshop on Genomic Signal Processing and Statistics (GENSIPS)

作者： Xuchu Hou Guoqiang Yu Xiguo Yuan Bai Zhang Ie-Ming Shih Zhen Zhang Robert Clarke Subha Madhavan Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Arlington VA USA Departments of Pathology School of Medicine Johns Hopkins University Baltimore MD USA School of Computer Science and Technology Xidian University Xian China Lombdardi Comprehensive Cancer Center Georgetown University Washington DC DC USA

ISBN: (纸本)9781467352345

Somatic Copy Number Alterations (CNAs) are quite common in human cancers. Identifying CNAs and Significant Copy number Aberrations (SCAs) in cancer genomes is a critical task in searching for cancer-associated genes. The advanced genomic technologies, such as SNP array technology, facilitate copy number study at a genome-wide scale with high resolution. However, in reality, due to normal tissue contamination, the observed intensity signals are actually the mixture of copy number signals contributed from both tumor cells and normal cells. This genetic heterogeneity could significantly affect the subsequent copy number analysis and SCAs detection. In order to accurately identify significant aberrations in contaminated cancer genome, we devise an approach including two major steps. We first use a statistical method, Bayesian Analysis of Copy number Mixtures (BACOM) to estimate the normal tissue contamination fraction and recover the “true” copy number profile. Then, based on the recovered profiles, we detect SCAs using Genome-wide Identification of Significant Aberrations in Cancer Genome (SAIC). We comprehensively evaluate the performance of the proposed algorithm on a large number of simulation data. The results show that the algorithm has higher detection power than peer methods including the most popular GISTIC. We then apply the method to the real copy number data of Glioblastoma Multiforme and successfully identified majority of SCAs reported by GISTIC, and some novel SCAs that contain some cancer-associated genes.

关键词： simulation Aberrations contamination aberrations copying Pollutant simulating Cancer Genome simulated data Glioblastoma Multiforme Cancer

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The design of experiments course arrangement system based on network

The design of experiments course arrangement system based on...

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2011 2nd International Conference on Artificial Intelligence, Management science and Electronic Commerce, AIMSEC 2011

作者： Yang, Hechao Yang, Xiang College of Computer Science and Technology Henan Polytechnic University Jiaozuo China

ISBN: (纸本)9781457705366

A computer experiments center management system is designed based on network. Using network programming technology and database technology, the purpose of this system is convenient to manage the university's computer laboratory center. The management of arranging the computer experimental is used network, and can easily check for the experimental room, experimental teachers, test various experimental class schedule. Searching experiment information from the system becomes easy. So as to promote the construction of digital campus network, simplify the traditionally cumbersome process of hand arrangement. © 2011 IEEE.

关键词： Design of experiments

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A new nonlinear control strategy for three-phase Photovoltaic grid-connected inverter

A new nonlinear control strategy for three-phase Photovoltai...

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2011 International Conference on Electronic and Mechanical Engineering and Information technology, EMEIT 2011

ISBN: (纸本)9781612840857

Photovoltaic (PV) grid-connected system requires the inverter possesses excellent dynamic and static characteristics. In view of the mathematical model of the inverter is nonlinear, we will adopt a kind of nonlinear control strategy called Passivity-Based Control (PBC) based on current model. First we establish the standard Euler-Lagrange (EL) current mode for inverter, then we also prove that this inverter is strictly passive. Based on passivity of inverter, we can redistribute the system energy, and adopt the approaches of injecting damping and decoupling to improve system performance. In this paper, we can make the power factor of inverter achieve one, and current of inverter output can fast track the grid voltage, we can also make the active power of system fast track the PV array maximum power point. Usually, we can use Single Chip Microcomputer or other kinds of computer with this algorithm for our design, this algorithm can be programmed with the computer language, such as C/C and assembly language, etc. Simulation results show that passivity-based control based on current model method can make the inverter possess better robustness and dynamic. © 2011 IEEE.

关键词： Microcomputers

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A robust timing synchronization method for OFDM system

A robust timing synchronization method for OFDM system

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2011 7th International Conference on Natural Computation, ICNC 2011

作者： Li, Ya Zhang, Lina Jia, Liqin School of Computer Science Henan Polytechnic University JiaoZuo 454000 China

ISBN: (纸本)9781424499533

In this paper, we proposed a robust timing synchronization method for OFDM systems using an antenna array, where the effect of carrier frequency offset (CFO) was eliminated by the crossed product of the array signal vector with a single conjugate element signal of the array. The synchronization timing estimation was realized under the least square criterion. Simulation results demonstrate that the proposed method is robust in the presence of CFO and the co-channel interference signals. © 2011 IEEE.

关键词： Antenna arrays

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Detection of arbitrary triangle

Detection of arbitrary triangle

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4th International Congress on Image and Signal Processing, CISP 2011

作者： Liu, Hong-Min Wang, Zhi-Heng School of Computer Science and Technique Henan Polytechnic University Jiaozuo China

ISBN: (纸本)9781424493067

This paper presents a method for the detection of arbitrary triangle based on the property that the distance of the incenter to the edges of the triangle is equidistant and equal to the radius of the inscribed circle. The method is constructed by the following steps. Firstly, the orientation line of each edge point is computed from the edge-only image. Secondly, the energy and the feature length of each pixel are calculated to obtain the feature length distribution map and energy distribution map of the whole image. Then the latter is made use to detect the candidate incenters of the triangles by local maximum detection. Subsequently, the true incenters are chose from the candidates according to the ratio of the energy and the feature length of the pixel. Finally, the orientation distribution of the equidistant edge points is considered and non-triangle is eliminated. Synthetic images and real images are used to prove the capability of the proposed method for detection of triangles and the experiments show good accuracy despite the presence of noises and Gaussian blurring. © 2011 IEEE.

关键词： Pixels

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Structural and Electronic Properties, and Pressure-Induced Phase Transition of Layered C5N: a First-Principles Investigation

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Chinese Physics Letters 2011年第12期28卷 203-206页

作者： HU Qian-Ku WANG Hai-Yan WU Qing-Hua HE Ju-Long ZHANG Guang-Lei School of Material Science and Engineering Henan Polytechnic UniversityJiaozuo 454003 State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004 School of Material Science and Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043

Seven layered C5N configurations constructed from hexagonal BN and graphite structures are studied using an ab initio pseudopotential density functional *** structural and electronic properties,and pressure−induced phase transition are investigated by calculating the total energy,structural parameter,formation energy,elastic constant,band structure and electron density of *** results show that the three C5N configurations constructed from the h−BN structure are more stable energetically than those four configurations from graphite *** C5N−I configuration with the highest symmetry and the AA stacking sequence along the c−axis is the most *** structure is stable mechanically and its phase separation is *** C5N phase is expected to have a metallic character.A critical pressure of about 20 GPa is predicted for the synthesis of a monoclinic C5N phase from the layered C5N phase.

关键词： structure configuration phase

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Traffic signs recognition based on visual attention mechanism

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Journal of China Universities of Posts and Telecommunications 2011年第SUPPL.2期18卷 12-16页

作者： Guo, Hai-Ru Wang, Xiao-Jie Zhong, Yi-Xin Lu, Peng Center for Intelligence Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China College of Computer Science and Technology Henan Polytechnic University Jiaozuo 454000 China

Abstract: In order to improve the speed and accuracy of traffic signs recognition (TSR), a novel method based on visual attention mechanism is present in this paper. According to this method, the potential regions of traffic signs could be detected by extracting color contrast features in the CIELab color space based on visual attention model, meanwhile dynamic thresholds are used to adjust the timing of the inhibition of return. Then scale invariant feature transform (SIFT) feature is extracted for the candidate region, the similarity calculation is done between the candidate region and the standard traffic signs, thus, the traffic sign would be recognized. Compared with traditional methods, the proposed method can achieve rapid and accurate detection and recognition and has the characteristics of no need for segmentation, less calculation, and bionics. The experiments results on two traffic signs databases collected from domestic and Netherlands show the method's excellent effect on TSR. © 2011 The Journal of China Universities of Posts and Telecommunications.

关键词： Traffic signs

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User trust evaluation for education cloud-oriented E-learning services

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Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong university of science and technology (Natural science Edition) 2012年第SUPPL.1期40卷 207-210页

作者： Tan, Wenan Li, Jingxian Hao, Junhua School of Computer and Information Shanghai Second Polytechnic University Shanghai 201209 China School of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

User trust cloud model and the capability trust assessment model were proposed respectively based on the user subjective trust and the capability objective trust. User trust cloud model was used to assess subjective trust on randomness and fuzziness complex user by using expectation, entropy and hyper entropy;and user capability trust evaluation model was introduced to assess a user's objective capability trust based on interactive objects and interactive behavior properties. A comprehensive trust evaluation model was implemented by combining the proposed two models, and the experiment results show that it can be useful for user trust evaluation for education cloud-oriented electronic learning (E-learning) services.

关键词： Entropy

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