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21st International Symposium on Antennas and Propagation (ISAP)

作者： Li, Hao Chen, Lijia Qiu, Jinghui Yang, Caitian Harbin Inst Technol Microwava Engn Dept 2 YiKuang St Harbin Peoples R China

ISBN: (纸本)9784885523137

An Antipodal Vivaldi antenna (AVA) with improved radiation and gain characters is proposed in this letter. In order to expand the frequency at the low-end bandwidth, three sets of slots are opened on each side of the antenna fins. For the purpose of increasing its performance at high frequency, the substrate structure between the arms of the antenna was designed as a triangular structure, thus minimizing the phase difference across the antenna aperture. This structure can improve the radiation at high frequency and raise the antenna gain by preventing the main beam from splitting as conventional Vivaldi antenna does. Also, this method does not increase the dimension of the antenna. The antenna analysis and design was carried out by CST software. The simulation result confirms the feasibility of the design.

关键词： Antipodal Vivaldi Antenna (AVA) slot antenna triangular structure

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A cell-core-attachment approach for identifying protein complexes in yeast protein-protein interaction network 11

A cell-core-attachment approach for identifying protein comp...

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11th International Conference on Natural Computation (ICNC) / 12th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Luo, Jiawei Lin, Dingyu Cao, Buwen Hunan Univ Coll Comp Sci & Elect Engn Changsha 410082 Hunan Peoples R China Hunan Univ Collaborat & Innovat Ctr Digital Chinese Med Proj Changsha 410082 Hunan Peoples R China

With the increasing of available protein-protein interaction (PPI) data, many computational methods have been explored to identify protein complexes from PPI networks. Majority of algorithms employ the feature of local neighbors to detect local dense subgraphs which correspond to protein complexes. Those approaches neglect the inherent core-attachment structure of protein complexes, which to an extent affect the protein complexes of prediction accuracy. In this paper, we propose a new algorithm for predicting protein complexes, deriving from the framework of the core-attachment. The proposed method first obtains the triangular structures of the core of protein complexes, name as cells, in which the edge-clustering coefficient is used. And then the cells are expanded to protein complex cores based on the closeness. Finally, the attachments are added to their corresponding cores to form the final protein complexes. The experimental results on two yeast PPI data show our method outperform the existing algorithms in terms of matched protein complexes and biological significance using two benchmark data sets.

关键词： Core-attachment protein complex protein-protein interaction triangular structure

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A Compact Antipodal Vivaldi Antenna with Improved Radiation Performance

A Compact Antipodal Vivaldi Antenna with Improved Radiation ...

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International Symposium on Antennas and Propagation

作者： Hao Li Lijia Chen Jinghui Qiu Caitian Yang Microwava Engineering Department Harbin Institute of Technology No.2 YiKuang Street Nangang District Harbin China

ISBN: (纸本)9781467379601

关键词： Antipodal Vivaldi Antenna (AVA) slot antenna triangular structure

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A Cell-core-attachment Approach for Identifying Protein Complexes in PPI Network 11

A Cell-core-attachment Approach for Identifying Protein Comp...

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11th International Conference on Natural Computation (ICNC) / 12th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Luo, Jiawei Lin, Dingyu Hunan Univ Coll Comp Sci & Elect Engn Changsha 410082 Hunan Peoples R China

ISBN: (纸本)9781467376792

With the increasing of available protein-protein interaction (PPI) data can be applied to computational methods to predict protein complexes. Most methods identify dense regions, which correspond to a cluster in the PPI network, as protein complexes. However, these dense regions could be protein complexes or sets of proteins that have circumstantial close interaction, which could affect the prediction accuracy. In this paper, a new algorithm for predicting protein complexes, applied the framework of the cell-core-attachment, is proposed. The triangular structures (cells) are obtained as the center of complex cores using the edge-clustering coefficient. Then the cells are expanded to protein complex cores. Finally, the attachments are appended to their corresponding cores to form the whole protein complexes. We apply the new approach into several yeast protein interaction data. Results show that the predicted protein complexes can match with the benchmark protein complexes better than the classic algorithms. Moreover, most of these protein complexes detected by our algorithm are biologically significant.

关键词： core-attachment protein complex protein-protein interaction triangular structure

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Design of Single and Coupled Microwave Meta-material Resonators in Microsystem Technology

Design of Single and Coupled Microwave Meta-material Resonat...

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Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP)

作者： Marcelli, Romolo Proietti, Emanuela Bartolucci, Giancarlo Lucibello, Andrea De Angelis, Giorgio Muzi, Gianluca Solymosi, Janos CNR IMM Roma Rome Italy Univ Roma Tor Vergata Dipartimento Ingn Elettr I-00173 Rome Italy VMC Engn Vicenza Italy BHE Bonn Elect Ltd Budapest Hungary

ISBN: (纸本)9782355000201

In this paper a Coupled triangular Resonators in coplanar waveguide (CPW) have been studied for S (2-4 GHz) and C (4-8 GHz) Band microwave applications. The peculiarity of the triangular structure to exhibit multiple resonances is usually proposed for dual and three-band purposes, to obtain efficient unit cells for high performance microwave tunable oscillators. One more characteristic of the triangular shape is the meta-material (MM) behavior, which favours a significant size decrease of the device. Coupled resonating configurations are proposed in this contribution, to be manufactured in Microsystem Technology by using polymeric layers as spacers between individual resonators organized in a vertical stack. Electromagnetic simulations have been performed to study narrow-band filters characterized by reduced dimensions, low insertion loss and steep band edges.

关键词： microsystems technologies Resonator Device Component NARROW BAND FILTER triangular structure multiple resonance MICROWAVE coplanar waveguides unit cell left-handed materials Spacer Device Component insertion loss

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Robust stabilisation for a class of time-delay systems with triangular structure

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IET CONTROL THEORY AND APPLICATIONS 2007年第4期1卷 875-879页

作者： Hua, C.-C. Guan, X.-P. Feng, G. Yanshan Univ Inst Elect Engn Qinhuangdao 066004 Peoples R China City Univ Hong Kong Dept Mfg Engn & Engn Management Hong Kong Hong Kong Peoples R China

The state-feedback control problem for a class of time-delay systems is investigated. The considered nonlinear systems have a triangular structure. By constructing a novel LyapunovKrasovskii functional, an adaptive state-feedback controller is designed via a backstepping method. The resulting closed-loop system is proved to be stable in the sense of uniform ultimate boundedness. Simulations are performed to verify the effectiveness of the proposed method.

关键词： robust stabilisation triangular structure Lyapunov methods nonlinear time-delay system adaptive control robust control state-feedback control problem delay systems Lyapunov-Krasovskii function backstepping method closed loop systems closed-loop system adaptive-feedback controller delays state feedback nonlinear control systems

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Backstepping tracking control for a class of discrete-time nonlinear systems in pure-feedback form

Backstepping tracking control for a class of discrete-time n...

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第八届IEEE信息与自动化国际会议(ICIC 2011)

作者： Hua Meng Zhan Zhang Shaoqing Wei College of Electrical Engineering and Information Hebei University of Science and Technology Shijiazhuang Hebei ProvinceChina

ISBN: (纸本)9781457702686

In this paper,a new control scheme is proposed for a class of pure-feedback nonlinear discrete-time systems by using backstepping *** problem is considered difficult to be dealt,mainly because that the triangular structure of pure-feedback systems has no affine appearance of the variables to be used as virtual *** the pure-feedback form is transformed into a cascade form,the feedback tracking controller is developed by using backstepping *** appropriate assumptions,the closed-loop nonlinear discrete-time system is uniformly ultimately *** stability of the close-loop system is proved based on Lyapunov theorem. Simulation studies are conducted to illustrate the effectiveness of the proposed approach.

关键词： Backstepping nonlinear pure-feedback time-delay Backstepping nonlinearity discrete time systems Feedback triangular structure tracking controller discrete-time tracking control

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Adaptive stabilisation for a class of non-linear state time-varying delay systems with unknown time-delay bound

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IET CONTROL THEORY AND APPLICATIONS 2010年第10期4卷 1905-1913页

作者： Zhang, Z. Xu, S. Chu, Y. Nanjing Univ Sci & Technol Sch Automat Nanjing 210094 Peoples R China Qufu Normal Univ Dept Elect Engn & Automat Rizhao 276826 Peoples R China Huzhou Teachers Coll Dept Math Huzhou 313000 Zhejiang Peoples R China

In this study, the authors address the problem of adaptive backstepping control for a class of single-input and single-output (SISO) non-linear time-delay systems in triangular structure. Both the parameters of the system to be controlled and the upper bounds of the time delays and their derivatives are assumed to be unknown. A direct adaptive controller for this class of uncertain non-linear systems is proposed. The assumption on delay-related non-linearities is further relaxed. An appropriate Lyapunov-Krasovskii functional is constructed, and the backstepping technique is used. It is shown that all the closed-loop signals are bounded, while the plant states converge to zero asymptotically. A simulation example is provided to demonstrate the design procedure and performance of the proposed method.

关键词： adaptive backstepping control nonlinear time-delay system adaptive control adaptive stabilisation uncertain nonlinear system time-varying systems Lyapunov-Krasovskii functional Time-varying control systems Stability in control theory control system synthesis Control system analysis and synthesis methods Nonlinear control systems closed loop systems single-input and single-output time-delay bound Self-adjusting control systems Lyapunov methods triangular structure nonlinear control systems closed-loop signal uncertain systems SISO nonlinear state time-varying delay system Distributed parameter control systems delay systems

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Dynamic Scaling Based Global Output Feedback for Systems with Input Uncertainties via a Singular Perturbation Redesign

Dynamic Scaling Based Global Output Feedback for Systems wit...

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2010 49th IEEE Conference on Decision and Control

作者： P. Krishnamurthy F. Khorrami Control/Robotics Research Laboratory (CRRL) Dept. of ECE Polytechnic Institute of NYU Brooklyn NY 11201 USA

ISBN: (纸本)9781424477456

A general class of uncertain nonlinear systems with time-varying and uncertain state and input delays is considered. The system structure includes a core nominal system of triangular structure along with uncertain appended dynamics driven by the entire state of the system. The control input is allowed to enter non-affinely into the system dynamics as well as to have uncertainties coupled with it. The control design is based on dual controller/observer dynamic high-gain scaling with an additional dynamic scaling based on a singular-perturbation-like redesign to address the non-affine and uncertain nature of the input appearance into the system dynamics. The proposed approach yields a delay-independent robust adaptive output-feedback control design. The only information about the time delays that is required in the control implementation is a bound on the rate of variation of time delays.

关键词： Uncertain nonlinear system System dynamics Output feedback design control Redesign Uncertainty triangular structure Plant uncertain control input

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Adaptive Neural Control for a Class of Low-triangular-structured Nonlinear Systems with H-∞ Performance Analysis

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Journal of Donghua University(English Edition) 2008年第4期25卷 425-433页

作者：王慧锋杜红彬 Automation Department East China University of Science and Technology

In this paper, a neural-network-based variable structure control scheme is presented for a class of nonlinear systems with a general low triangular structure. The proposed variable structure controller is proved to be Cl, thus can be applied for backstepping design, which has extended the scope of previous nonlinear systems in the form of strict-feedback and pure-feedback. With the help of neural network approximator, H-∞ performance analysis of stability is given. The effectiveness of proposed control law is verified via simulation.

关键词： adaptive neural control variable structure control nonlinear system backstep ping triangular structure H-∞ performance

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