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IEEE International Conference on Multimedia and Expo (ICME 2006)

作者： Wang, Chiapin Lin, Tsungnan Natl Taiwan Univ Dept Elect Engn Taipei 10764 Taiwan

ISBN: (纸本)9781424403660

This paper investigates multimedia quality fairness in wireless LAN environments where channel are error-prone due to mobility and fading. The experimental results show that using fixed MAC arguments for nodes in heterogeneous channel conditions leads to unequal throughput performance and that may incur the degradation of multimedia QoS. To overcome the unfairness problem for provisioning QoS, we propose a cross-layer adaptation scheme by on-line adapting the multidimensional MAC-layer backoff parameters depending on the application-layer QoS requirements and PHY-layer channel conditions. Our solution is based on an optimization approach which utilizes neural networks to learn the cross-layer function. Simulation results demonstrate that our adaptive scheme can tackle a variety of channel condition to provide fair throughput for nodes in heterogeneous channel conditions.

关键词： Neural networks adaptive algorithm Wireless LAN Throughput Multidimensional systems Cost function Streaming media Fading Intelligent networks Degradation

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A Normalized Filtered-x Generalized Fractional Lower Order Moment adaptive algorithm for Impulsive ANC Systems 61

A Normalized Filtered-x Generalized Fractional Lower Order M...

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61st IEEE International Midwest Symposium on Circuits and Systems (MWSCAS)

作者： Akhtar, Muhammad Tahir Nazarbayev Univ Sch Engn Dept Elect & Comp Engn Kabanbay Batyr Ave 53 Astana Kazakhstan

ISBN: (纸本)9781538673928

This paper proposes an efficient algorithm for impulsive active noise control (IANC) systems. The impulsive sources cannot be modeled by Gaussian distribution, and hence the standard adaptive algorithm based on second order statistics would give poor performance or even fail to converge. One solution is to derive adaptive algorithm by minimizing a fractional low order moment, resulting in the famous filtered-x least mean p-power (FxLMP) algorithm. The proposed algorithm discussed in this paper is based on a previously proposed generalized FxLMP algorithm. The key idea here is to introduce a variable step-size using a convex-combination approach. A large value is used at the start-up of IANC system to achieve a fast convergence speed. As the AINC system converges, the step-size automatically reduces to a small value to improve the steady-state noise reduction performance. Simulations demonstrate the effectiveness of the proposed algorithm.

关键词： adaptive algorithm active noise control impulsive noise convex combination variable step-size

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Evaluation of an adaptive algorithm for fuzzy type-2 control in blood pressure regulation

Evaluation of an adaptive algorithm for fuzzy type-2 control...

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IEEE International Conference on Fuzzy Systems (FUZZ)

作者： Sprunk, Nicole Garcia, Alejandro Mendoza Bauernschmitt, Robert Knoll, Alois Tech Univ Munich Insititute Robot & Embedded Syst D-80290 Munich Germany

ISBN: (纸本)9781479900206

The use of fuzzy logic in the medical environment is very promising as it offers the possibility to incorporate the knowledge and experience of the physician into fuzzy sets and rules. The type-2 fuzzy logic makes it even possible to incorporate the knowledge of several physicians into a single controller, thus enhancing it with the uncertainty present among different physicians. Once the controller is defined the outputs depend solely on its current inputs. It does not take any process information into account. For that purpose the controller is enhanced with an adaptive algorithm. It allows gradual changes by also keeping the initial rules, which had been defined by the physician and are helping for his comprehension of how rules are being applied. The type-2 fuzzy controller and the adaptive algorithm are described and compared to each other in the application of blood pressure regulation with drugs.

关键词： fuzzy type-2 control problem medical application adaptive algorithm Comparision of different fuzzy controllers blood pressure regulation with medication

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An modified RTP adaptive algorithm

An modified RTP adaptive algorithm

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International Conference on Info-Tech and Info-Net (ICII 2001)

作者： Cheng, WX Lei, ZM Beijing Univ Posts & Telecommun ATM Ctr Beijing 100088 Peoples R China

In the paper, we present a variable additive increase adaptive algorithm, which utilizes RTP/RTCP as the protocol to collect QoS information. Compared with constant additive algorithm, the flow enhanced by the variabl... 详细信息

ISBN: (纸本)7900081585

关键词： RTP/RTCP adaptive algorithm UDP flow control congestion control

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adaptive algorithm of a Tap-Changer Controller of the Power Transformer Supplying the Radial Network Reducing the Risk of Voltage Collapse

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ENERGIES 2020年第20期13卷

作者： Malkowski, Robert Izdebski, Michal Miller, Piotr Gdansk Univ Technol Fac Elect & Control Engn Dept Elect Power Engn PL-80233 Gdansk Poland Inst Power Engn Gdansk Div PL-80870 Gdansk Poland Lublin Univ Technol Fac Elect Engn & Comp Sci Dept Power Engn PL-20618 Lublin Poland

The development of renewable energy, including wind farms, photovoltaic farms as well as prosumer installations, and the development of electromobility pose new challenges for network operators. The results of these changes are, among others, the change of network load profiles and load flows determining greater volatility of voltages. Most of the proposed solutions do not assume a change of the transformer regulator algorithm. The possibilities of improving the quality of regulation, which can be found in the literature, most often include various methods of coordination of the operation of the transformer regulator with various devices operating in the Medium-Voltage (MV) network. This coordination can be decentralized or centralized. Unfortunately, the proposed solutions often require costly technical resources and/or large amounts of real-time data monitoring. The goal of the authors was to create an algorithm that extends the functionality of typical transformer control algorithms. The proposed solution allows for reducing the risk of voltage collapse. The performance of the proposed algorithm was validated using multivariate computer simulations and tests with the use of a physical model of the distribution network. The DIgSILENT PowerFactory environment was used to develop the simulation model of the proposed algorithm. Then, tests were conducted on real devices installed in the LINTE2 Laboratory at the Gdansk University of Technology, Poland. Selected test results are included in this paper. All results have shown that the proposed algorithm makes it possible to increase the reserve of the voltage stability of the node, in which it is applied, thus mitigating the risk of a voltage collapse occurring. The proposed algorithm does not require complex and costly technical solutions. Owing to its simplicity, it has a high potential for practical application, as confirmed by the real-time control experiment in the laboratory.

关键词： voltage collapse voltage control transformer controller adaptive algorithm voltage regulation distribution system power distribution network distributed generation OLTC

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Analysis of adaptive algorithm to Power Aware Design for H.264/AVC Integer Motion Estimation Engine in HDTV Application

Analysis of Adaptive Algorithm to Power Aware Design for H.2...

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IEEE 8th International Conference on ASIC

作者： Huang, Yiqing Ikenaga, Takeshi Waseda Univ Informat Product & Syst Tokyo 8070803 Japan

ISBN: (纸本)9781424438686

In this paper, we contribute two reconfigurable integer motion estimation (IME) architectures (namely RSADT and RPPSAD) based on adaptive algorithm. Firstly, based on the pixel difference analysis, the spatial redundancy is further exploited and three subsampling patterns are selected adaptively. Secondly, in order to keep full data reuse, we propose an architecture level data organization for RSADT architecture. For RPPSAD, we apply pixel classification and memory organization to keeps full data reuse. An interactive data loading scheme is proposed to reduce power dissipation. Experiments show that, with some extra hardware, our RSADT can averagely achieve 65.86% reduction in processing time;as for RPPSAD, it can save 25.4% to 39.8% power dissipation when processing typical HDTV720p sequences.

关键词： H.264/AVC Reconfigurable Architecture adaptive algorithm

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An adaptive algorithm using FIR filter for speech enhancement systems 29

An adaptive algorithm using FIR filter for speech enhancemen...

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第29届中国控制与决策会议

作者： Caiyun Wu Xiaoying Wang Hong Zhao School of Equipment Engineering Shenyang Ligong University Tianjin Railway Technical and Vacational College

ISBN: (纸本)9781509046584

An adaptive algorithm for speech enhancement is studied in this *** propose the adaptive Lyapunov speech enhancement algorithm for nonlinear speech enhancement system using FIR *** using the Lyapunov stability theory,the filter coefficients can adaptively adjust so that the error converges to zero *** adaptive algorithm ensures the speech enhancement system has a better performance than the traditional least mean square *** the case that the size,weight and power consumption,the design of a microphone array for hearing aids are serious hard to establish,the algorithm still *** last,an example of speech enhancement system result demonstrated the feasibility and effectiveness of the proposed adaptive algorithm.

关键词： Speech Enhancement adaptive algorithm FIR Filter

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A New Efficient Wavelet-Based adaptive algorithm for Automatic Speech Quality Enhancement 18

A New Efficient Wavelet-Based Adaptive Algorithm for Automat...

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4th International Conference on Engineering and MIS (ICEMIS)

作者： Djendi, Mohamed Univ Blida 1 Signal Proc & Image Lab LATSI Route SoumaaBP 270 Blida 09000 Algeria

ISBN: (纸本)9781450363921

In this paper, we address the problem of speech enhancement by adaptive filtering algorithm. A particular attention has been made for the backward blind source separation (BBSS) algorithm and its use in speech enhancement application. In this paper, we propose to implement the BBSS algorithm in the Wavelet-domain. The proposed backward wavelet BBSS (WBBSS) algorithm is then used in speech enhancement test. The new WBBSS shows better performances in terms of convergence speed and steady state in comparison with BBSS one. The obtained results have been evaluated in terms of segmental SNR and cepstral distance criteria and confirm the best performance of the proposed WBBSS algorithm.

关键词： Speech enhancement adaptive algorithm Segmental SNR cepstral distance

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adaptive algorithm for rapidly optimising the generator-tripping control

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JOURNAL OF ENGINEERING-JOE 2019年第16期2019卷 3039-3045页

作者： Huang, Tiangang Xue, Yusheng Xue, Feng Zhao, Junhua Zhang, Jianmin NARI Grp Corp State Grid Elect Power Res Inst Nanjing 211106 Jiangsu Peoples R China Southeast Univ Sch Elect Engn Nanjing 210096 Jiangsu Peoples R China State Key Lab Smart Grid Protect & Control Nanjing 211106 Jiangsu Peoples R China Chinese Univ Hong Kong Sch Sci & Engn Shenzhen 518100 Peoples R China Hangzhou Dianzi Univ Coll Automat Hangzhou 310018 Zhejiang Peoples R China

The fast optimisation of transient stability emergency control (TSEC) strategy is a key factor of online safeguard for AC-DC interconnected systems. An engineering applicable TSEC algorithm has to obtain the disturbed trajectories of the system by numerical integration, and then do quantised stability knowledge mining. Theoretical analysis and simulation verification reveal that the premise is to identify the unstable mode correctly, and then emergency control decision can be optimised according to the cost performance of the actions. Small integral step is usually needed for accuracy. In order to coordinate the accuracy and computational burden intelligently, this study proposes an algorithm for optimising generator-tripping control, which can adaptively reduce computational burden. If the unstable mode is insensitive to the change of fault parameters (e.g. fault clearing time), this case's time-varying property is more likely to be weak. Only for such cases, large-step Taylor series expansions (LSTSE) can be taken to replace small-step numerical integration (SSNI) and search for the optimal result. Based on its time-varying property, each case can get disturbed trajectories using LSTSE or SSNI adaptively and obtain optimal solution. The excellent performance of this algorithm is verified by simulation of nine Chinese regional power systems under various operating conditions.

关键词： optimisation power system control power system interconnection power system faults power system transient stability time-varying property disturbed trajectories Chinese regional power systems adaptive algorithm generator-tripping control fast optimisation transient stability emergency control strategy online safeguard AC-DC engineering applicable TSEC algorithm numerical integration quantised stability knowledge mining theoretical analysis unstable mode emergency control decision cost performance integral step computational burden clearing time large-step Taylor series expansions

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Research on Visual Tracking System Software of Cutting Robot Based on adaptive algorithm 4

Research on Visual Tracking System Software of Cutting Robot...

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4th IEEE International Conference on Power, Electronics and Computer Applications, ICPECA 2024

作者： Zhang, Teng China Coal Technology & Engineering Group Nanjing Design & Research Institute Co. Ltd Nanjing China Nanjing Yhd Intelligent System Co. Ltd Nanjing China

ISBN: (纸本)9798350359589

This paper studies various tracking algorithms based on the characteristics of visual tracking system. According to the characteristics of cutting robot, tangential tracking and normal approximation are studied. An adaptive correction algorithm for motion trajectory of precision cutting manipulator is presented. The algorithm compares it with the PSR fraction to achieve the target tracking algorithm. The translation filter and proportional filter are modified. The device collects image information from CCD equipped with suitable lighting equipment and lens, uses image processing board to preprocess, binarize, compresses and encodes the image information, and then recognizes and interprets it by computer. And by a servo motor and drive to complete a 1:1 linear tracking, experiments show that the image tracking software of the cutting robot designed in this paper can reach the latest discriminative correlation filter tracking method, and it has better adaptability. Experimental results show that this method can achieve target tracking well. © 2024 IEEE.

关键词： adaptive algorithm control software cutting robot visual tracking

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