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A Novel ρ-q/Distortion Model for H.264 Rate Control Algorithm

A Novel ρ-q/Distortion Model for H.264 Rate Control Algorit...

2010 International Conference on Audio,Language and Image Processing(2010年音频、语言与图像处理国际会议 ICALIP 2010)

作者： Mingjing Ai Lili Zhao Mingyang Tan State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beijing 100191 China

ISBN: (纸本)9781424458653

Rate control aims to maximize reconstructed video quality while adapting coding bit rate to the fluctuating network bandwidth. This paper proposes an easy rate control algorithm for H.264 video coding based on a novel ρ -q/Distortion model, whose data line shows quite a pleasing goodness-of-fit. Experimental results have demonstrated that, compared with rate control mechanism suggested in H.264 reference software, the proposed model provides a better reconstructed visual quality with a coding gain up to 0.37dB as well as much smaller bit rate control error with a maximum reduced bit rate up to 2.04kbps.

关键词： rate control Bit rate data line Video coding coding gain control mechanism computer algorithms

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Performance Analysis of Single Phase Series Active Compensator using Control Algorithm based on Unit Vector Generation

Performance Analysis of Single Phase Series Active Compensat...

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Innovative Trends and Advances in Engineering and Technology (ICITAET), International Conference on

作者： Nivedita S. Pande Anshu Choudhary Department of Electrical Engg. Rajiv Gandhi College of Engg.& Research Nagpur India Department of Electrical Engg. G H Raisony Institute of Engineering and Technology Nagpur India

ISBN: (数字)9781728119014

ISBN: (纸本)9781728119021

A deterioration of the power quality is a major concern due to harmonics injected by the non-linearity of the consumer loads which are specially power electronic devices (Rectifier Load). A single phase Diode Bridge Rectifier (DBR) draws non-linear current thus degrading the power quality at the PCC. This paper focuses on the single phase series active compensator to alleviate the voltage and current harmonics under non-linear load condition. A DC link capacitor is shared between VSI and single phase DBR so as to reduce the component requirement and to resist the AC mains side voltage variations. The compensator behavior has been analyzed graphically with the single phase DBR as a non-linear load. To confirm the efficacy of the suggested system an extensive digital simulation has been carried out in MATLAB/Simulink environment.

关键词： Series Active Power Filter (SAPF) voltage fed type non-linear load Diode Bridge Rectifier (DBR) Voltage Source Inverter (VSI) Unit vector based control algorithm Total Harmonic Distortion (THD) Point of Common Coupling (PCC) Power quality single phase computer algorithms Distributed Bragg reflectors dc-link capacitor Unit vector current harmonics voltage source inverter load condition VOLTAGE graphically harmonics nonlinearity Rectifiers

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Real-Time Application of a Computational Algorithm Using Trend Analysis of Abdominal Near-Infrared Spectroscopy Predicts the Onset of Necrotizing Enterocolitis in a Randomized Control Trial

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JOURNAL OF THE AMERICAN COLLEGE OF SURGEONS 2017年第4期225卷 S156-S156页

作者： Cruz, Stephanie M. Lau, Patricio E. Stoll, Barbara Robinson, Jason L. Yu, Ling Lu, Thomas Burrin, Doug Olutoye, Oluyinka O. Texas Childrens Hosp Baylor Coll Med Houston TX 77030 USA

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Predictive Control of an Asymmetric Cascaded Multilevel Inverter with a Single DC Source

Predictive Control of an Asymmetric Cascaded Multilevel Inve...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Marcelo Vasquez Jorge Pontt Juan Vargas Electronics Engineering Department Universidad Tecnica Federico Santa Maria

ISBN: (纸本)9781479902255

This paper proposes a control scheme for an asymmetric cascaded multilevel inverter with a single DC source. This control approach permits a unique DC source generate three-phase current with one main cell and one floating cell per phase. Main cell are handled by using a space vector control and floating cells are controlled by a predictive control strategy. This strategy is used to control the floating capacitors voltages to maintain an asymmetry to maximize the number of levels of the load voltage and also manage the reactive power to reduce the harmonics produced by the main cell, which also provides the active power to the load. Finally, the proposed control algorithm improves the load current quality with a reduce number of calculation. Results are presented in simulations.

关键词： DC power supply Predictive control Space vector control load voltage three-phase current Electric loads cascades Inventors active power Reactive power multilayers computer algorithms

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Model Predictive Control of Domestic Heat Pump

Model Predictive Control of Domestic Heat Pump

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American Control Conference

作者： Mikkel Urban Kajgaard Jesper Mogensen Anders Wittendorff Attila Todor Veress Benjamin Biegel Department of Electronic Systems Automation and Control Aalborg University Denmark

ISBN: (纸本)9781479901777

In this paper we consider a house heated by a domestic heat pump. We estimate the economical savings that can be achieved by moving the electrical heat pump load in time according to the time-varying value of electricity. Real data from an inhabited typical Danish house is used to estimate a simple thermal house model. Based on this model and based on the electricity spot prices, we design a control algorithm that seeks to minimize the cost of house heating. Via simulations on a model of a typical Danish single-family house, we show that economical savings in the magnitude of 7 % can be achieved during winter by allowing slightly higher variations in the indoor temperature. Further we show that these economical savings are upper bounded by 12 % for the particular case.

关键词： Domestic Heat Pump economical savings electrical heat pump load heat pumps residential heating Savings Domestic architecture computer algorithms Model predictive control Predictive control Electricity Domestic single family housing Danish

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Cooperative AUV Motion Planning using Terrain Information

Cooperative AUV Motion Planning using Terrain Information

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Oceans 2013 - Norway

作者： Andreas J. Hausler Alessandro Saccon Antonio M. Pascoal John Hauser A. Pedro Aguiar Laboratory of Robotics and Systems in Science and Engineering Instituto Superior Tecnico Department of Mechanical Engineering Eindhoven University of Technology Electrical Computer and Energy Engineering Department University of Colorado at Boulder Faculdade de Engenharia University of Porto

ISBN: (纸本)9781479900022

There is widespread interest in the deployment of fleets of marine robots with the potential to roam the oceans freely and collect data at an unprecedented scale. This calls for the development of efficient algorithms for multiple vehicle motion planning that can take directly into account the capabilities of each vehicle as well as the environmental conditions and lend themselves to seamless integration with control and navigation systems. The latter connection is for the most part eschewed in the literature, in spite of the obvious fact that in order for the vehicles to execute the planned motions they must at a later stage navigate with great accuracy and follow the trajectories using control algorithms that take explicitly into account the dynamical constraints of the vehicles involved. Among the methods available for underwater vehicle navigation, terrain-based techniques have recently come to the fore. These techniques avoid the use of overly expensive inertial-like motion sensor units and hold considerable promise for the development of a new breed of affordable long range navigation systems. Motivated by these considerations, we tackle in the present paper the problem of multiple vehicle motion planning by taking explicitly into consideration inter-vehicle collision avoidance, together with a number of criteria that may include simultaneous times of arrival at assigned target points, energy minimization, acoustic communication constraints, and the maximization of terrain information along the vehicle paths (as measured by some appropriate criterion) for terrain-based navigation purposes.

关键词： vehicle motion planning Collision avoidance terrains Autonomous underwater vehicles Data Collection Methods Navigation systems computer algorithms

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Cable Stiffened Flexible Link Manipulator

Cable Stiffened Flexible Link Manipulator

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IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Rahul Dixit R. Prasanth Kumar Research Center Imarat Hyderabad India - 500069 Department of Mechanical and Aerospace Engineering Indian Institute of Technology Hyderabad Ordnance Factory Estate Yeddumailaram India - 502205

ISBN: (纸本)9781479969357

Flexible link manipulators (FLMs) have several advantages over rigid link manipulators (RLMs) in aspects such as mass and moment of inertia, energy consumption, and speed. However, they suffer from a major limitation of flexibility that affects precision of operation. Control algorithms that are currently used for RLMs cannot be directly applied to FLMs. Majority of research on FLMs has focused on how to eliminate or reduce the undesirable effects of flexibility by specially developed control algorithms. In this paper, we introduce a new design change that stiffens the flexible link manipulator using cables and minimizes the effect of flexibility while retaining the advantages of FLMs. Such cable stiffened flexible link manipulators have the advantage of allowing the use of existing control techniques designed for RLMs. Effectiveness of this new approach is shown through simulations and experiments.

关键词： flexible link manipulators cable undesirable effects computer algorithms updated design Control technology

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Output Control for Nonlinear System with Time-Varying Delay and Stability Analysis

Output Control for Nonlinear System with Time-Varying Delay ...

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IEEE Conference on Decision and Control

作者： Anton A. Pyrkin Alexey A. Bobtsov Department of Control Systems and Informatics Saint Petersburg State University of Information Technologies Mechanics and Optics Kronverkskiy av. 49 Saint Petersburg 197101 Russia

ISBN: (纸本)9781612848006

This paper deals with the output stabilization of systems with sector-bounded nonlinearity and time-varying delay. In this paper we will consider the problem of absolute stability for a class of time-delay systems which can be represented as a feedback connection of a linear dynamical system with unknown parameters and a uncertain nonlinearity satisfying a sector constraint. For a class of output control algorithms a controller providing output exponential stability of nonlinear system is proposed. Certain results of application of theoretical robust and adaptive control algorithms for various Lego Mindstorms NXT mobile robots (track, wheel and walking ones) are presented in the article.

关键词： output control time varying feedback connection Stability analysis Delay systems system clock absolute stability computer algorithms DYNAMICAL SYSTEMS Unknown parameter exponential stability. track wheel

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Harmonics Compensation and Power Factor Improvement Using LED Driver

Harmonics Compensation and Power Factor Improvement Using LE...

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IEEE Energy Conversion Congress and Exposition

作者： Saeed Anwar Ali Elrayyah Yilmaz Sozer Department of Electrical and Computer Engineering The University of Akron Akron Ohio USA

ISBN: (纸本)9781479957774

Power quality improvement technique using LED driver is presented in this paper. Harmonics is one of the major factors that affect the power quality of conventional grid or microgrid. Electrical loads are connected to the main grid as a common bus which is known as Point of Common Coupling (PCC). Harmonics are generated from different power supply units, rectifiers, power converters, UPS, generators, magnetic devices and LED lights. In this research, the harmonics compensation unit is incorporated into a LED driver which is capable of eliminating harmonics from PCC where the residential loads are connected. Half controlled rectifier is used for LED driver and the switches are controlled by the proposed control algorithm to reduce the harmonics on the PCC voltage. Fast and efficient algorithm has been utilized for the system. The simulation and experimental results are presented to verify the effectiveness of the proposed method.

关键词： harmonic compensation Light emitting diodes Power quality power unit computer algorithms efficient algorithm point of common coupling Switches residential load

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A New Control Technique for Dual Stator Induction Generator Used in Standalone Applications

A New Control Technique for Dual Stator Induction Generator ...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Saptarshi Basak Chandan Chakraborty Department of Electrical Engineering Indian Institute of Technology Kharagpur WB-721302 India

ISBN: (纸本)9781479917631

Brushless Generation Systems are currently in great demand for remote area micro-grid application. Dual Stator Winding Induction Generator (DSWIG), having two windings on the stator of same pole configuration and a squirrel cage rotor, has been identified as one of the suitable candidates for such application. In most of the configurations proposed so far, one of the winding is responsible for power extraction and the other for maintaining desired excitation. This paper proposes a control algorithm which facilitates power extraction through both the stator windings. MATLAB/SIMULINK based simulation studies illustrate the efficacy of the control method. A dSPACE 1103 based laboratory prototype has been developed and experimental results are presented.

关键词： Brushless Generation Systems Dual Stator Winding Induction Generator Micro-Grid Renewable Energy Extraction power extraction Control Methods squirrel-cage rotor Control technology MICRO-GRID Induction generators Stators Stator windings computer algorithms windings winding (process) Dual

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