检索结果-内蒙古大学图书馆

FIXED-POINT ERROR analysis OF STOCHASTIC GRADIENT ADAPTIVE LATTICE FILTERS

IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING 1990年第1期38卷 70-80页

作者： MATHEWS, VJ XIE, Z Department of Electrical Engineering University of Utah Salt Lake UT USA

A theoretical analysis is presented of the stochastic gradient adaptive lattice filter used as a linear, one-step predictor, when the effects of finite-precision arithmetic are taken into account. Only the fixed-point implementation is considered. Both the unnormalized and normalized adaptation algorithms are analyzed. Expressions of the steady-state mean-squared values of the accumulated numerical errors in the computation of the reflection coefficients and the prediction errors of different orders have been developed. The results show that the dominant term in the expressions for the mean-squared values of the numerical errors is inversely proportional to the convergence parameter. Furthermore, they indicate that the quantization errors associated with the reflection coefficients are more critical than those associated with representing the prediction-error sequences. Signals with high correlation among samples produce larger numerical errors in the adaptive lattice filter. The authors present several simulation examples that show close agreement with the theoretical results. They also show that the gradient adaptive lattice filters have better numerical properties than their transversal counterparts.< >

关键词： Error analysis Stochastic processes Lattices Adaptive filters Reflection Transversal filters Nonlinear filters Arithmetic algorithm design and analysis Steady-state

来源：评论

学校读者我要写书评

暂无评论

Leaky LMS algorithm: MSE analysis for Gaussian data

引用

IEEE TRANSACTIONS ON SIGNAL PROCESSING 1997年第4期45卷 927-934页

作者： Mayyas, K Aboulnasr, T UNIV OTTAWA DEPT ELECT ENGNOTTAWAON K1N 6N5CANADA

Despite the widespread usage of the leaky LMS algorithm, there has been no detailed study of its performance, This paper presents an analytical treatment of the mean-square error (MSE) performance for the leaky LMS adaptive algorithm for Gaussian input data, The common independence assumption regarding W(n) and X(n) is also used. Exact expressions that completely characterize the second moment of the coefficient vector and algorithm steady-state excess MSE are developed, Rigorous conditions for MSE convergence are also established. Analytical results are compared with simulation and are shown to agree well.

关键词： Least squares approximation Data analysis algorithm design and analysis Signal processing algorithms Performance analysis Convergence Adaptive algorithm Steady-state Telephony Interference

来源：评论

学校读者我要写书评

暂无评论

A WEIGHTED LEAST-SQUARES algorithm FOR QUASI-EQUIRIPPLE FIR AND IIR DIGITAL-FILTER design

引用

IEEE TRANSACTIONS ON SIGNAL PROCESSING 1992年第3期40卷 551-558页

作者： LIM, YC LEE, JH CHEN, CK YANG, RH NATL TAIWAN UNIV DEPT ELECT ENGNTAIPEI 10764TAIWAN

It has been demonstrated by several authors that if a suitable frequency response weighting function is used in the design of an FIR filter, the weighted least squares solution is equiripple. The crux of the problem in the design of equiripple filters using the weighted least squares technique lies in the determination of the necessary least squares frequency response weighting function. In this paper, a novel iterative algorithm for deriving the least squares frequency response weighting function which will produce a quasi-equiripple design is presented. The algorithm converges very rapidly. From our experience, it typically produces a design which is only about 1 dB away from the minimax optimum solution in two iterations and converges to within 0.1 dB in six iterations. Convergence speed is independent of the order of the filter. It can be used to design filters with arbitrarily prescribed phase and amplitude response.

关键词： Least squares methods Finite impulse response filter Digital filters algorithm design and analysis Frequency response Minimax techniques Iterative algorithms Fourier series Least squares approximation

来源：评论

学校读者我要写书评

暂无评论

Managing data storage in the network

引用

IEEE INTERNET COMPUTING 2001年第5期5卷 50-58页

作者： Plank, JS Bassi, A Beck, M Moore, T Swany, DM Wolski, R Dept. of Comput. Sci. Tennessee Univ. Knoxville TN USA University of Tennessee

Efficient management of program state is critical to performance and functionality in distributed and network applications. To support domain- and application-specific optimization of data movement, the authors developed the Internet Backplane Protocol (IBP) for controlling storage that is implemented as part the network fabric itself. IBP allows an application to control intermediate data staging operations explicitly as data is communicated between processes. As such, the application can exploit locality and manage scarce buffer resources effectively. This article discusses the development of IBP, the implementation of a prototype system for managing network storage, and a preliminary deployment as part of the Internet2 Distributed Storage Initiative. Keywords: network storage, logistical networking, network buffers.

关键词： Internet Protocols Application Program Interfaces Resource Allocation Storage Management Client Server Systems Data Storage Management Internet Backplane Protocol Uniform Interface State Management Internet Networking Protocols Logistical Networking Distributed Applications Processor Backplane Remote Storage Standard Internet Resources EBP API Middleware design IBP Alpha Versions Layered Approach Memory Intelligent Networks IP Networks Buffer Storage Internet Backplanes algorithm design and analysis Routing Access Protocols Communication Standards

来源：评论

学校读者我要写书评

暂无评论

Efficient algorithms for performing packet broadcasts in a mesh network

引用

IEEE-ACM TRANSACTIONS ON NETWORKING 1996年第4期4卷 639-648页

作者： Modiano, E Ephremides, A UNIV MARYLAND DEPT ELECT ENGNCOLLEGE PKMD 20742

We consider processors communicating over a mesh network with the objective of broadcasting information among each other, One instance of the problem involves a number of nodes all with the same message to be broadcasted. For that problem, a lower-bound on the time to complete the broadcast, and an algorithm which achieves this bound are presented. In another instance, every node in the mesh has packets to be broadcast arriving independently, according to a Poisson random process, The stability region for performing such broadcasts is characterized, and broadcast algorithms which operate efficiently within that region are presented, These algorithms involve interacting queues whose analysis is known to be very difficult, Toward that end we develop an approximation which models an n-dimensional infinite Markov chain as a single-dimensional infinite Markov chain together with an n-dimensional finite Markov chain. This approximate model can be analyzed and the results compare favorably with simulation.

关键词： Packet Switching Approximation Theory Stability Network Topology Parallel algorithms Markov Processes Broadcasting Stochastic Processes Random Processes Packet Broadcasts Mesh Network Processors Communication Lower Bound Poisson Random Process Stability Region Broadcast algorithms Interacting Queues Network Protocols Infinite Markov Chain Approximate Model Simulation Parallel algorithms Processors Network Broadcasting Mesh Networks Protocols Parallel algorithms Mesh Generation Random Processes Stability Queueing analysis algorithm design and analysis Analytical Models

来源：评论

学校读者我要写书评

暂无评论

Reflecting on algorithmic Bias With design Fiction: The MiniCoDe Workshops

引用

IEEE INTELLIGENT SYSTEMS 2024年第2期39卷 40-50页

作者： Turchi, Tommaso Malizia, Alessio Borsci, Simone Univ Pisa I-56126 Pisa Italy Univ Twente Enschede Netherlands

In an increasingly complex everyday life, algorithms-often learned from data, i.e., machine learning (ML)-are used to make or assist with operational decisions. However, developers and designers usually are not entirely aware of how to reflect on social justice while designing ML algorithms and applications. algorithmic social justice-i.e., designing algorithms including fairness, transparency, and accountability-aims at helping expose, counterbalance, and remedy bias and exclusion in future ML-based decision-making applications. How might we entice people to engage in more reflective practices that examine the ethical consequences of ML algorithmic bias in society? We developed and tested a design-fiction-driven methodology to enable multidisciplinary teams to perform intense, workshop-like gatherings to let potential ethical issues emerge and mitigate bias through a series of guided steps. With this contribution, we present an original and innovative use of design fiction as a method to reduce algorithmic bias in co-design activities.

关键词： Ethics Machine learning algorithms Intelligent systems Machine learning Decision making Standards algorithm design and analysis

来源：评论

学校读者我要写书评

暂无评论

Being sensitive to uncertainty

引用

COMPUTING IN SCIENCE & ENGINEERING 2007年第2期9卷 10-20页

作者： Arriola, Leon M. Hyman, James M. Univ Wisconsin Whitewater WI 53190 USA Los Alamos Natl Lab Los Alamos NM 87545 USA

Predictive modeling's effectiveness is hindered by inherent uncertainties in the input parameters. Sensitivity and uncertainty analysis quantify these uncertainties and identify the relationships between input and output variations, leading to the construction of a more accurate model. This survey introduces the application, implementation, and underlying principles of sensitivity and uncertainty quantification.

关键词： Sensitivity analysis Stochastic Processes Predictive Modeling Sensitivity analysis Uncertainty analysis Sensitivity analysis Diseases Predictive Models Sampling Methods Computational Modeling Input Variables Probability Density Function algorithm design and analysis Measurement Uncertainty Statistical analysis Stochastic Sensitivity Uncertainty analysis Volatility

来源：评论

学校读者我要写书评

暂无评论

EFFECTS OF ARCHITECTURE IMPLEMENTATION ON DFT algorithm PERFORMANCE

引用

IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING 1985年第3期33卷 684-693页

作者： MEHALIC, MA RUSTAN, PL ROUTE, GP USAF INST TECHNOLWRIGHT PATTERSON AFBOH 45433

Five major DFT algorithms were evaluated on seven different computers. The relative performances of these algorithms were related to the architecture of each computer by finding a relationship between the execution time and the instruction counts. The relative performance of these algorithms on other computers is predicted, based on the knowledge of the computer architecture. On certain implementations, data transfers are more important than floating-point additions and multiplications when comparing DFT algorithms. On the average, data transfers account for a greater percentage of the execution time than floating-point operations,

关键词： Computer architecture Assembly Computer aided instruction Testing Radio access networks algorithm design and analysis Military computing

来源：评论

学校读者我要写书评

暂无评论

Medical Image analysis

引用

IEEE PULSE 2011年第6期2卷 60-70页

作者： Ritter, Felix Boskamp, Tobias Homeyer, Andre Laue, Hendrik Schwier, Michael Link, Florian Peitgen, Heinz-Otto Fraunhofer MEVIS-Institute for Medical Image Computing Germany MeVis Medical Solutions Germany

Since the discovery of the X-ray radiation by Wilhelm Conrad Roentgen in 1895, the field of medical imaging has developed into a huge scientific discipline. The analysis of patient data acquired by current image modalities, such as computerized tomography (CT), magnetic resonance tomography (MRT), positron emission tomography (PET), or ultrasound (US), offers previously unattained opportunities for diagnosis, therapy planning, and therapy assessment. Medical image processing is essential to leverage this increasing amount of data and to explore and present the contained information in a way suitable for the specific medical task. In this tutorial, we will approach the analysis and visualization of medical image data in an explorative manner. In particular, we will visually construct the image processing algorithms using the popular graphical data-flow builder MeVisLab, which is available as a free download for noncommercial research. We felt that it could be more interesting for the reader to see and explore examples of medical image processing that go beyond simple image enhancements. The part of exploration, to inspect medical image data and experiment with image-processing pipelines, requires software that encourages this kind of visual exploration.

关键词： Data visualization Image segmentation Rendering (computer graphics) Computed tomography Medical diagnostic imaging algorithm design and analysis Medical image processing X-ray imaging

来源：评论

学校读者我要写书评

暂无评论

A NOTE ON FUZZY SET-THEORY IN SCANNING

引用

IEEE TRANSACTIONS ON FUZZY SYSTEMS 1995年第1期3卷 110-115页

作者： BANDEMER, H KRAUT, A Faculty of Mathematics and Computer Science Freiberg University of Mining and Technology Freiburg im Breisgau Germany

Scanning of a natural picture handled by an image processing system always causes a loss of information, i.e., the micro picture elements become uncertain and vague. This is essential when the picture is to be used for measuring or evaluation of structural parameters. To make the induced uncertainty and vagueness transparent up to the computed results, specifications and procedures from fuzzy set theory are presented and suggested. Especially, distances of pixels are considered. For a demonstration how this uncertainty can influence conclusions from the given picture, the computation of the approximate gradient of a curve is considered.

关键词： Fuzzy set theory Image processing Structural engineering Pixel Optical devices Automatic control Image reconstruction Layout algorithm design and analysis Microscopy

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：