检索结果-内蒙古大学图书馆

Fast block mode decision algorithm in H.264/AVC video coding

JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION 2008年第3期19卷 175-183页

作者： Kim, Jong-Ho Kim, Byung-Gyu [a]Real-time Multimedia Research Lab Embedded Software Division Electronics and Telecommunications Research Institute Republic of Korea [b]Computer Software & Engineering Department University of Science and Technology Republic of Korea

The recent video coding standard H.264/AVC show extremely higher coding efficiency compare to any other previous standards. H.264/AVC can achieve over 50% of bit rate saving with same quality using the rate-distortion process, but it brings high computational complexity. In this paper, we propose an algorithm that can reduce the complexity of the codec by reducing the block mode decision process adaptively. Block mode decision process in H.264/AVC consists of inter mode decision process and intra mode decision process. We deal with reduction method for inter and intra mode decision. In this paper an efficient method is proposed to reduce the inter mode decision complexity using the direct prediction methods based on block correlation and adaptive rate distortion cost threshold for early stopping. The fast intra mode reduction algorithm based on inter mode information is also proposed to reduce the computational complexity. The experimental results show that the proposed algorithm can achieve up to 63.34-77.39% speed up ratio with a little PSNR loss. Increment in bit requirement is also not much noticeable. (c) 2007 Elsevier Inc. All rights reserved.

关键词： video coding image compression image coding prediction methods video processing

来源：评论

学校读者我要写书评

暂无评论

End user specication of RoboCup teams 3rd

引用

3rd Robot World Cup Soccer Games and Conferences, RoboCup 1999

作者： Scerri, Paul Ydrén, Johan Real-time Systems Laboratory Department of Computer and Information Science Linköpings Universitet LinköpingS-581 83 Sweden Institute for Computer Science Linkpings Universitet Sweden

ISBN: (纸本)9783540410430

Creating complex agents for simulation environments has long been the exclusive realm of AI experts. However it is far more desirable that experts in the particular application domain, rather than AI experts, are empowered to specify agent behavior. In this paper an approach is presented that allows domain experts to specify the high-level team strategies of agents for RoboCup. The domain experts’ specications are compiled into behavior based agents. The 1999 RoboCup World Cup provided an interesting basis for evaluation of the approach. We found that for RoboCup it is not necessary to allow a user to change low level aspects of the agents’ behavior in order for them to create a range of different, interesting teams. We also found that the modular nature of behavior based architectures make them an ideal target architecture for compiling enduser specications. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Artificial intelligence

来源：评论

学校读者我要写书评

暂无评论

Optical position stabilization of an UAV for autonomous landing 7

Optical position stabilization of an UAV for autonomous land...

引用

7th German Conference on robotics, ROBOTIK 2012

作者： Ax, Markus Thamke, Stefan Kuhnert, Lars Schlemper, Jens Kuhnert, Klaus-Dieter University of Siegen Fak. IV - Electrical Engineering and Computer Science Institute for Real-Time Learning Systems Germany

Vertical Take-Off and Landing (VTOL) capable Mini Unmanned Aerial Vehicles (MUAV) are an economic alternative to real helicopters if local aerial pictures or other aerial measurements are needed. With electronic stabilization, GPS based position-hold and autonomous way-point functions these systems are easy to operate. While autonomous take off and flying are done routinely, this is not true for autonomous landing. GPS based position stabilization, in conjunction with the normally used cheap and small IMUs, is not accurate enough to avoid dangerous moves in the very last moment of the landing operation. While sufficient for an emergency landing this is not suitable as routine operation. In this paper a solution is presented which uses optical flow techniques for position stabilization in the moment just before the touch down to avoid the inaccuracies from the GPS at this critical moment. © 7th German Conference on robotics, ROBOTIK 2012

关键词： Stabilization

来源：评论

学校读者我要写书评

暂无评论

Model-based analysis, synthesis and testing of automotive hardware/software architectures

Model-based analysis, synthesis and testing of automotive ha...

引用

6th Embedded systems Week 2010, ESWEEK 2010 - 10th ACM International Conference on Compilers, Architecture and Synthesis for Embedded systems, EMSOFT'10

作者： Chakraborty, Samarjit Ramesh, S. Teich, Jürgen Institute for Real-Time Computer Systems TU Munich Germany India Science Laboratory General Motors R and D India Department of Computer Science University of Erlangen-Nuremberg Germany

ISBN: (纸本)9781605589046

This tutorial is concerned with various aspects of model-based design of hardware/software architectures of automotive systems. It will be split into three parts, the first dealing with model-based analysis of automotive ECU networks, the second with synthesis of schedules for such networks, and finally the third with model-based testing of such architectures.

关键词： Model checking

来源：评论

学校读者我要写书评

暂无评论

A fuzzy control approach for executing subgoal guided motion of a mobile robot in a partially-known environment

A fuzzy control approach for executing subgoal guided motion...

引用

IEEE International Conference on robotics and Automation (ICRA)

作者： J. Zhang P. Bohner Institute for Real-Time Computer Systems and Robotics Department of Computer Science University of Karlsruhe Germany

A fuzzy control approach is proposed for controlling a mobile robot by effectively using the static knowledge of a partially-known environment and the dynamic sensor data. To describe the global structure of the static environment, a tangent-graph is first constructed and a sequence of subgoals is generated for guiding the global path direction. During the execution of these subgoals, a motion executor using the concept of fuzzy control evaluates the sensor data and the robot current status, and adjusts the moving speed and direction of the robot.< >

关键词： Fuzzy control Mobile robots Robot sensing systems Path planning Control systems Humans Motion control Robot control Roads Robot motion

来源：评论

学校读者我要写书评

暂无评论

Cyber-physical medical and medication systems

Cyber-physical medical and medication systems

引用

28th International Conference on Distributed Computing systems Workshops, ICDCS Workshops 2008

作者： Cheng, Albert M. K. Real-Time Systems Laboratory Department of Computer Science University of Houston Houston TX 77204-3010 United States

ISBN: (纸本)9780769531731

Medical and medication devices are real-time systems with safety and timing requirements. They range from hard-real-time, embedded, and reactive systems such as pacemakers to soft-real-time, standalone medication dispensers. Many of these devices are already connected to computer networks, especially in hospital intensive-care units, so that patients' conditions detected by sensors can be monitored in real-time at remote computer stations nearby or at other sites. However, remote adjustment of medical devices' output and actuation is typically not allowed due to safety concerns. This article discusses a number of issues such as verification that must be resolved in order to allow cyber-physical operation of medical devices. In particular, we propose using formal methods, self-stabilization, and (m,k)-firm scheduling to allow the safe cyber-physical operation of a medical ventilator, a life-critical reactive device to move breathable air into and out of the lungs of a patient with respiratory difficulties, with the ultimate goal of speeding-up the recovery of the patient. © 2008 IEEE.

关键词： Intensive care units

来源：评论

学校读者我要写书评

暂无评论

ORIENTING POLYGONAL PARTS WITHOUT SENSORS

引用

ALGORITHMICA 1993年第2-4期10卷 201-225页

作者： GOLDBERG, KY 1. Institute for Robotics and Intelligent Systems Computer Science Department University of Southern California 90089-0273 Los Angeles CA USA

In manufacturing it is often necessary to orient parts prior to packing or assembly. We say that a planar part is polygonal if its convex hull is a polygon. We consider the following problem: given a list of n vertices describing a polygonal part whose initial orientation is unknown, find the shortest sequence of mechanical gripper actions that is guaranteed to orient the part up to symmetry in its convex hull. We show that such a sequence exists for any polygonal part by giving an O(n2 log n) algorithm for finding the sequence. Since the gripper actions do not require feedback, this result implies that any polygonal part can be oriented without sensors.

关键词： robotics PARTS FEEDING PLANNING GRASPING COMPLIANCE MOTION PLANNING WITH UNCERTAINTY COMPLIANT MOTION PLANNING

来源：评论

学校读者我要写书评

暂无评论

Evaluating the impact of communication latency on applications running over on-chip multiprocessing platforms: A layered approach

Evaluating the impact of communication latency on applicatio...

引用

8th IEEE International Conference on Industrial Informatics, INDIN 2010

作者： Indrusiak, Leandro Soares Ost, Luciano Copello Moraes, Fernando Gehm Määttä, Sanna Nurmi, Jari Möller, Leandro Glesner, Manfred Real-Time Systems Group Computer Science Department University of York United Kingdom Porto Alegre Brazil Department of Computer Systems Tampere University of Technology Finland Institute of Microelectronic Systems Darmstadt University of Technology Germany

ISBN: (纸本)9781424473007

The evaluation of communication latency in multiprocessor platforms requires the profiling of the application, the description of the architecture of the platform and of the mapping of application tasks onto processing cores. In this paper, we describe a layered approach that allows application developers to obtain accurate figures for communication latency from an abstract model of the application functionality. A complete separation of concerns is a critical part of this approach, so the major contribution here is the definition of interfaces between different layers: an abstract application model, its executable counterpart, the mapping heuristic and the multiprocessor platform model. Case studies with a realistic application and a NoC-based multiprocessor platform show the potential of the proposed approach using two different system evaluation techniques: simulation and static analysis. © 2010 IEEE.

关键词： Mapping

来源：评论

学校读者我要写书评

暂无评论

The virtual lover： variable and easily guided 3D fish animations as an innovative tool inmate-choice experiments with sailfin mollies-I,Design and implementation

引用

Current Zoology 2017年第1期63卷 55-64页

作者： Klaus MuLLER Jevgen SMIELIK Jan-Marco HOTWOHL Stefanie GIERSZEWSKI Klaudia WITTE Klaus-Dieter KUHNERT Department of Electrical Engineering & Computer Science Institute of Real-Time Learning Systems University of Siegen HSIderlinstraBe 3 Siegen 57076 Germany Research Group of Ecology and Behavioral Biology Institute of Biology University of Siegen Adolf-Reichwein-Stral~e 2 Siegen 57068 Germany

Animal behavior researchers often face problems regarding standardization and reproducibility oftheir experiments. This has led to the partial substitution of live animals with artificial virtual stim-uli. In addition to standardization and reproducibility, virtual stimuli open new options for re-searchers since they are easily changeable in morphology and appearance, and their behavior canbe defined. In this article, a novel toolchain to conduct behavior experiments with fish is presentedby a case study in sailfin mollies Poecilia latipinna. As the toolchain holds many different and novelfeatures, it offers new possibilities for studies in behavioral animal research and promotes thestandardization of experiments. The presented method includes options to design, animate, andpresent virtual stimuli to live fish. The designing tool offers an easy and user-friendly way to definesize, coloration, and morphology of stimuli and moreover it is able to configure virtual stimuli ran-domly without any user influence. Furthermore, the toolchain brings a novel method to animatestimuli in a semiautomatic way with the help of a game controller. These created swimming pathscan be applied to different stimuli in real time. A presentation tool combines models and swim-ming paths regarding formerly defined playlists, and presents the stimuli onto 2 *** with live sailfin mollies validated the usage of the created virtual 3D fish models inmate-choice experiments.

关键词： computer animation, fish behavior, mate-choice experiment, research tool, virtual fish model.

来源：评论

学校读者我要写书评

暂无评论

Design of a fuzzy controller for optimal execution of subgoal-guided robot motions

Design of a fuzzy controller for optimal execution of subgoa...

引用

IEEE International Conference on robotics and Automation (ICRA)

作者： Jianwei Zhang A. Herp Inst. for Real-Time Computer Systems and Robotics Karlsruhe Univ. Germany Institute for Real-Time Computer Systems and Robotics Department of Computer Science University of Karlsruhe Karlsruhe Germany

In this paper, an approach is presented for designing a robot controller to integrate path planning and motion execution. Instead of following an exactly planned geometric path, which cannot be easily modified to deal with uncertainties, a robot realizes its motion under the guidance of a sequence of grossly selected crucial points called subgoals. A fuzzy model is used for on-line controlling the robot to pass through the subgoals smoothly. With the help of heuristics for optimal motion control, the rule base can be developed. Such a concept provides a control method in real time as well as a possibility of integrating sensor data for the subgoal-guided motion.< >

关键词： Fuzzy control Optimal control Motion control Path planning Orbital robotics Robot sensing systems Motion planning Collision avoidance Solid modeling Control systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：