检索结果-内蒙古大学图书馆

Annual Conference on Information Sciences and systems (CISS)

作者： Chih-Chun Wang Ness B. Shroff Center for Wireless Systems and Applications School of Electrical & Computer Engineering Purdue University Calumet West Lafayette IN USA Departments of ECE and CSE Ohio State Uinversity Columbus OH USA

Cross-layer optimization including congestion control, routing, and scheduling has shown dramatic throughput improvement over layered designs for wireless networks. In parallel, the paradigm-shifting network coding has empirically demonstrated substantial throughput improvement when coding operations are permitted at intermediate nodes and packets from different sessions are mixed. designing network codes and the associated flow in network coding presents new challenges for cross-layer optimization for wireless multi-hop networks. This work shows that with a new flow-based characterization of pairwise intersession network coding, a joint optimal scheduling and rate-control algorithm can be implemented distributively. Optimal scheduling is computationally expensive to achieve even in a purely routing-based (without network coding) paradigm, let alone with network coding. Thus, in this paper, the impact of imperfect scheduling is studied, which shows that pairwise intersession network coding can improve the throughput of routing-based solutions regardless of whether perfect/imperfect scheduling is used. Both the deterministic and stochastic packet arrivals and departures are considered. This work shows for the first time a striking resemblance between pairwise intersession network coding and routing, and thus advocates extensions of routing-based wisdoms to their network coding counterpart.

关键词： Wireless networks Network coding Optimal scheduling Throughput design optimization Routing Processor scheduling Spread spectrum communication Scheduling algorithm computer networks

来源：评论

学校读者我要写书评

暂无评论

Remote Experiments for Control Education

引用

IFAC Proceedings Volumes 2008年第2期41卷 9117-9121页

作者： Soohee Han Bokyu Kwon BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems Seoul National University Korea School of Electrical Engr. & Computer Science Seoul National University Korea

This paper suggests remote experiments using the internet for the control education. The remote experiment is composed of equipment server computers, networks accessible to internet, and real plants such as inverted pendulums and crane systems. Additionally, it requires a server program that has I/O functions with plants and calculate the control, an interface program bridging between web and the server program, and the home page including the detail explanation for the usage. For effective educations, how to perform experiments and how to combine the experiment with lectures will be discussed. The simple experiments by entering a few control parameters and the complex experiments by designing overall controls, will be explained. Technologies related with the remote experiment will be introduced. It is demonstrated that the remote experiment will be very useful, particular for control education where students have difficulties in performing the experiments for lack of experimental equipments.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fractional-Order Signal Processing using a Polymer-Electrolyte Transistor

Fractional-Order Signal Processing using a Polymer-Electroly...

引用

51st Midwest Symposium on Circuits and systems (MWSCAS 2008), vol.2

作者： Robert L. Ewing Hoda S. Abdel-Aty-Zohdy Michael C. Hollenbeck Kenneth S. Stevens Information Directorate US Air Force Research Laboratory OH USA Microelectronics System Design Laboratory Department of Electrical and Systems Engineering Oakland University Rochester MI USA Department of Electrical and Computer Engineering University of Utah Salt Lake UT USA

Fractional-order systems have applications in the areas of Flight Control, Robotics, Missile Guidance, Control of Structural Vibrations of Space Platforms and Sensor Technology. Fractional-order transfer functions can characterize complex nonlinear dynamics with many fewer parameters than integer-order functions. This paper addresses the use of a polymer-electrolyte transistor (PET) for use in implementating fractional-order algorithms for signal processing. The PET's advantage over the conventional RC and RL circuits is that it can be both functionally scaled and varied for dynamic fractional-order parameter controllability.

关键词： Fractional-Order Signal Processing Polymer-electrolyte transistor Acid/base chemistry Diffusion Electrokinetic flow

来源：评论

学校读者我要写书评

暂无评论

Time series gene expression data clustering and pattern extraction in Arabidopsis thaliana phosphatase-encoding genes

Time series gene expression data clustering and pattern extr...

引用

IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Pooya Sobhe Bidari Roozbeh Manshaei Tahmineh Lohrasebi Amir Feizi Mohammad Ali Malboobi Javad Alirezaie Department of Biomedical Engineering K.N. Toosi University of Technology Tehran Iran National Institute of Genetic Engineering and Biotechnology Tehran Iran Department of Systems Design Engineering University of Waterloo ONT Canada Department of Electrical and Computer Engineering Ryerson University Toronto ONT Canada

Clustering of genes using their expression data has been a major topic in recent years. A large amount of gene expression data even in time series are obtained by microarray technology. Finding gene clusters with similar functions and interconnecting genes by networks has an important role in mining biological gene functional analysis. In this paper, two phase functional clustering has been presented as a new approach in gene clustering. The proposed approach is based on finding functional patterns of time series gene expression data by fuzzy C-means (FCM) and K-means methods. The gene function similarities over a number of experimental conditions are extracted using Pearson correlation between expression patterns of genes. This leads to visualize genes interconnections.

关键词： Gene expression Data mining Clustering algorithms Java Data analysis Biomedical engineering Genetics Functional analysis Data visualization design engineering

来源：评论

学校读者我要写书评

暂无评论

Finite memory generalized predictive controls for discrete-time state space models

Finite memory generalized predictive controls for discrete-t...

引用

International Conference on Control, Automation and systems ( ICCAS)

作者： Jung Hun Park Soohee Han Wook Hyun Kwon BK21 School for Creative Engineering Design of Next Generation Mechanical and AeroSpace Systems Seoul National University Seoul South Korea School of Electrical Engineering & Computer Science Seoul National University Seoul South Korea

In this paper, a generalized predictive control (GPC) is represented over state space and then is shown to be separated into the receding horizon control (RHC) and the steady-state Kalman filter. By utilizing only the information on the recent finite inputs and outputs, we propose a new finite memory GPC (FMGPC) that consists of the RHC and a finite impulse response (FIR) filter. The proposed FMGPC will be compared with a conventional GPC for an input-output (I/O) model and the existing receding horizon finite memory control (RHFMC) for a state space model.

关键词： Predictive control State-space methods Predictive models Steady-state Finite impulse response filter Electronic mail Process control Stability analysis Robust stability Control system synthesis

来源：评论

学校读者我要写书评

暂无评论

Application of reinforcement learning for segmentation of transrectal ultrasound images

引用

BMC Medical Imaging 2008年第1期8卷 8-8页

作者： Sahba, Farhang Tizhoosh, Hamid R. Salama, Magdy M.A. Medical Instrument Analysis and Machine Intelligence Group University of Waterloo Waterloo ON Canada Department of Systems Design Engineering University of Waterloo Waterloo ON Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo ON Canada

Background: Among different medical image modalities, ultrasound imaging has a very widespread clinical use. But, due to some factors, such as poor image contrast, noise and missing or diffuse boundaries, the ultrasound images are inherently difficult to segment. An important application is estimation of the location and volume of the prostate in transrectal ultrasound (TRUS) images. For this purpose, manual segmentation is a tedious and time consuming procedure. Methods: We introduce a new method for the segmentation of the prostate in transrectal ultrasound images, using a reinforcement learning scheme. This algorithm is used to find the appropriate local values for sub-images and to extract the prostate. It contains an offline stage, where the reinforcement learning agent uses some images and manually segmented versions of these images to learn from. The reinforcement agent is provided with reward/punishment, determined objectively to explore/exploit the solution space. After this stage, the agent has acquired knowledge stored in the Q-matrix. The agent can then use this knowledge for new input images to extract a coarse version of the prostate. Results: We have carried out experiments to segment TRUS images. The results demonstrate the potential of this approach in the field of medical image segmentation. Conclusion: By using the proposed method, we can find the appropriate local values and segment the prostate. This approach can be used for segmentation tasks containing one object of interest. To improve this prototype, more investigations are needed. © 2008 Sahba et al;licensee BioMed Central Ltd.

关键词： Reinforcement Learning Processing Task TRUS Image Segmentation Approach Online Mode

来源：评论

学校读者我要写书评

暂无评论

Data Center Transport Mechanisms: Congestion Control Theory and IEEE Standardization

Data Center Transport Mechanisms: Congestion Control Theory ...

引用

Annual Allerton Conference on Communication, Control, and Computing

作者： Mohammad Alizadeh Berk Atikoglu Abdul Kabbani Ashvin Lakshmikantha Rong Pan Balaji Prabhakar Mick Seaman Department of Electrical Engineering Stanford University Department of Computer Science Stanford University Broadcom Corporation San Jose Cisco Systems San Jose Departments of Electrical Engineering and Computer Science Stanford University Security Task Group

ISBN: (纸本)9781424429257

Data Center Networks present a novel, unique and rich environment for algorithm development and deployment. Projects are underway in the IEEE 802.1 standards body, especially in the Data Center Bridging Task Group, to define new switched Ethernet functions for data center use. One such project is IEEE 802.1Qau, the Congestion Notification project, whose aim is to develop an Ethernet congestion control algorithm for hardware implementation. A major contribution of this paper is the description and analysis of the congestion control algorithm-QCN, for Quantized Congestion Notification - which has been developed for this purpose. A second contribution of the paper is an articulation of the Averaging Principle: a simple method for making congestion control loops stable in the face of increasing lags. This contrasts with two well-known methods of stabilizing control loops as lags increase;namely, (i) increasing the order of the system by sensing and feeding back higher-order derivatives of the state, and (ii) determining the lag and then choosing appropriate loop gains. Both methods have been applied in the congestion control literature to obtain stable algorithms for high bandwidth-delay product paths in the Internet. However, these methods are either undesirable or infeasible in the Ethernet context The Averaging Principle provides a simple alternative, one which we are able to theoretically characterize.

关键词： data center control ring INSTITUTE OF electrical AND ELECTRONIC ENGINEERS Instruction repertory computer algorithms Joints Control Theory Ethernet networks notification closed-loop gain

来源：评论

学校读者我要写书评

暂无评论

Moisture Absorption Phenomena in Green Composite Printed Circuit Board Prototypes

Moisture Absorption Phenomena in Green Composite Printed Cir...

引用

Pulsed Power Conference, 2005 IEEE;San Francisco,CA,USA

作者： John D. Lincoln Andrew A. Shapiro Jean-Daniel M. Saphores Oladele A. Ogunseitan Department of Chemical Engineering and Materials Science University of California Irvine CA USA Department of Electrical Engineering and Computer Science University of California Irvine CA USA Departments of Civil and Environmental Engineering Economics and Planning Policy and Design University of California Irvine CA USA Public Health Program College of Health Sciences and the Program in Industrial Ecology Department of Environmental Health Science and Policy University of California Irvine CA USA

ISBN: (纸本)9781424422722

This research developed the moisture-resistance of printed circuit board (PCB) laminate prototypes based on the non-toxic composite materials made from epoxidized linseed oil, melamine polyphosphate, and flax fibers. One of the key issues associated with using renewable base materials in composites is their sensitivity to moisture. A characterization of the properties of the 'green' printed circuit boards developed in the present study showed that moisture absorption for untreated fiber laminates (4.87% vs. established limit <0.8% for FR4 boards over a 24 hour submersion period) compromised electrical resistance and decreased dielectric breakdown to an unacceptable level. A theoretical model was used to target methods for reducing moisture absorption. Based on this model, we found that reductions in fiber diffusivity and fiber volume fraction substantially reduce composite diffusivity. Through the use of chemical treatment, moisture absorption over a 24 hour time period was reduced from 4.87% to 1.15%, which improved electrical properties. At the end of this study, 15 of 18 PCB property requirements were met, while 3 moisture-critical property targets were narrowly missed.

关键词： Printed Circuit Board design for Environment Green Composite Moisture Absorption Natural Fiber

来源：评论

学校读者我要写书评

暂无评论

Electrocardiographic pill for cattle heart rate determination

Electrocardiographic pill for cattle heart rate determinatio...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Steve Warren Angel Martinez Timothy Sobering Daniel Andresen Department of Electrical & Computer Engineering Kansas State University Manhattan KS USA Integrated Defense Systems Raytheon Corporation Andover MA USA Electronics Design Laboratory Kansas State University Manhattan KS USA Department of Computing & Information Sciences Kansas State University Manhattan KS USA

Decreased agricultural profit margins and recent bioterrorism concerns have led to an increased interest in monitoring livestock health. Heart rate and core body temperature are traditional vital parameters for cattle health assessment, as they provide warnings for illness and disease. However, obtaining these data in the field is time and labor intensive, which speaks to the need for solutions that provide continuous and automatic acquisition of these parameters. This paper presents the design of a pill that can remain in an animal's reticulum and use electrocardiographic techniques to ascertain heart rate. The wired prototype has been tested with a fistulated steer. These tests demonstrate that consistent heart vector data can be acquired even in the presence of animal movement and rumination. After minor processing, these signals are suitable for use with peak detection circuitry that can automate heart rate determination.

关键词： Cows Heart rate Biomedical monitoring Electrocardiography Band-pass filters Monitoring

来源：评论

学校读者我要写书评

暂无评论

Editorial: Dependability and security

引用

IEEE Transactions on Dependable and Secure Computing 2008年第1期5卷 1-3页

作者： Iyer, Ravishankar K. Gligor, Virgil D. Kalbarczyk, Zbigniew T. Kanoun, Karama Katzenbeisser, Stefan Mukherjee, Shubu Shieh, Shiuhpyng Zorian, Yervant Department of Electrical and Computer Engineering Carnegie Mellon University Microsoft's Trusted Computing Academic Advisory Board Center for Reliable and High-Performance Computing Coordinated Science Laboratory University of Illinois Urbana-Champaign United States IEEE IEEE Computer Society LAAS CNRS IFIP Working Group 10.4 on Dependable Computing and Fault Tolerance Special Interest Group on Dependability Benchmarking IFIP Working Group 10.4 French SEE Technical Committee on Trustworthy Computer Systems SEE Working Group Design and Validation for Dependability Technical University Munich Germany Darmstadt University of Technology ACM IACR Intel's SER Tech Council Intel's Architecture Patent Committee Taiwan Information Security Center NCTU IEEE Reliability Society Taipei and Tainan IACR United States Virage Logic Corp. AT and T Bell Laboratories Logic Vision Inc. University of British Columbia IEEE Test Technology Technical Council

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：