检索结果-内蒙古大学图书馆

Proceedings - Design Automation conference 1999年 56-61页

作者： Lakshminarayana, Ganesh Raghunathan, Anand Khouri, Kamal S. Jha, Niraj K. Dey, Sujit Princeton Univ San Diego United States

This paper presents a design methodology, called common-case computation (CCC), and new design automation algorithms for optimizing power consumption or performance. The proposed techniques are applicable in conjunction with any high-level design methodology where a structural register-transfer level (RTL) description and its corresponding scheduled behavioral (cycle-accurate functional RTL) description are available. It is a well-known fact that in behavioral descriptions of hardware (also in software), a small set of computations (CCCs) often accounts for most of the computational complexity. However, in hardware implementations (structural RTL or lower level), CCCs and the remaining computations are typically treated alike. This paper shows that identifying and exploiting CCCs during the design process can lead to implementations that are much more efficient in terms of power consumption or performance. We propose a CCC-based high-level design methodology with the following steps: extraction of common-case behaviors and execution conditions from the scheduled description, simplification of the common-case behaviors in a stand-alone manner, synthesis of common-case detection and execution circuits from the common-case behaviors, and composing the original design with the common-case circuits, resulting in a CCC-optimized design. We demonstrate that CCC-optimized designs reduce power consumption by up to 91.5%, or improve performance by up to 76.6% compared to designs derived without special regard for CCCs.

关键词： Computer aided design

来源：评论

学校读者我要写书评

暂无评论

Proceedings of the IEEE International conference on Electronics, Circuits, and Systems

Proceedings of the IEEE International Conference on Electron...

引用

6th IEEE International conference on Electronics, Circuits and Systems, ICECS 1999

ISBN: (纸本)0780356829

The proceedings contain 433 papers. The topics discussed include: a fully integrated 2 GHz frequency synthesizer;new circuit techniques based on a high performance frequency-TC-voltage converter;an enhanced frequency synthesizer using an analog dual input accumulator;automatic architecture evaluation for hardware/software Codesign;low-voltage linear OTA with rail-to-rail differential mode input signal capability;low-power implementation of a residue-to-weighted conversion unit for a 5-moduli RNS;an improved nonlinear analysis and design method of microstrip oscillators based on modem CAD techniques;feedforward ANC system using adaptive FIR filters with on-line secondary path identification;a design procedure for 2-channel mixed analog and digital filter banks for A/D conversion using minimax optimization;controlling chaotic nonlinear dynamical systems;user choices for efficient 3D motion and shape extraction from orthographic projections;and code acquisition in CDMA communication system with fictitious pilot signals.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Proceedings of the IEEE International conference on Electronics, Circuits, and Systems

Proceedings of the IEEE International Conference on Electron...

引用

6th IEEE International conference on Electronics, Circuits and Systems, ICECS 1999

ISBN: (纸本)0780356829

关键词：

来源：评论

学校读者我要写书评

暂无评论

Code optimization by integer linear programming 8th

Code optimization by integer linear programming

引用

Joint European conference on Theory and Practice of software (ETAPS 99)

作者： Kästner, D Langenbach, M Univ Saarland Fachbereich Informat D-66041 Saarbrucken Germany

ISBN: (纸本)3540657177

The code quality of many high-lever language compilers in the field of digital signal processing is not satisfactory This is mostly due to the complexity of the code generation problem together with the irregularity of typical DSP architectures. Since digital signal processors mostly are traded on the high volume consumer market, they are subject to serious cost constraints. On the other hand, many embedded applications demand high performance capacities. Thus, it is very important that the features of the processor are exploited as efficiently as possible. By using integer linear programming (ILP), the deficiencies of the decoupling of different code generation phases can be removed, since it is possible to integrate instruction scheduling and register assignment in one homogeneous problem description. This way, optimal solutions can be found-albeit at the cost of high compilation times. Our experiments show, that approximations based on integer linear programming can provide a better solution quality than classical code generation algorithms in acceptable runtime for medium sized code sequences. The experiments were performed for a modern DSP, the Analog Devices ADSP-2106x.

关键词： Digital signal processing

来源：评论

学校读者我要写书评

暂无评论

Common-case computation: A high-level technique for power and performance optimization

Common-case computation: A high-level technique for power an...

引用

36th Annual Design Automation conference, DAC 1999

作者： Lakshminarayana, Ganesh Raghunathan, Anand Khouri, Kamal S. Jha, Niraj K. Dey, Sujit Princeton Univ San Diego CA United States

关键词： Computer aided design

来源：评论

学校读者我要写书评

暂无评论

Design and optimization, steady-state and dynamic analysis of synchronous reluctance motors controlled by voltage-fed converters with nonlinear controllers

Design and optimization, steady-state and dynamic analysis o...

引用

IEEE International conference on Electric Machines and Drives (IEMDC)

作者： S.E. Lyshevski A. Nazarov A. El-Antably C. Yokomoto A.S.C. Sinha M. Rizkalla M. El-Sharkawy Department of Electrical Engineering Purdue University Indianapolis Indianapolis IN USA Division of General Motors Allison Transmission Indianapolis IN USA

This paper presents innovative results to improve the design and manufacture of high-performance synchronous reluctance machines. These results have been obtained from our research in analyzing and synthesizing advanced control algorithms to promote the competitiveness of three-phase synchronous reluctance machines in electric drives in comparison with permanent-magnet synchronous motors and induction machines. These results have direct application in the design and manufacture of electric- and hybrid-electric drivetrains for light-, medium-, and heavy-duty vehicles. First, we report on the dynamic optimization of medium duty synchronous reluctance machines described by nonlinear differential equations. Second, we describe a new design optimization method, based upon nonlinear electromagnetic analysis, to improve steady-state performance and to enhance the operating envelope. highly efficient, high-speed synchronous reluctance motors, ranging from 10 kW to 100 kW, were manufactured and tested. The design methods ensure cost-effective production of a new generation of state-of-the-art synchronous reluctance motors. This paper develops a nonlinear model of synchronous reluctance motors that incorporates saturation effects. Kirchhoff's and Newton's laws are used to derive the models. The application of Park's transformation results in a set of differential equations in the rotor reference frame; the q-, d- and zero-axis voltage and current quantities are used in analysis, modeling and design. Robust controllers are developed to guarantee closed-loop system stability and attain the disturbance rejection.

关键词： Design optimization Steady-state Reluctance machines Reluctance motors Vehicle dynamics Differential equations Robust stability Pulp manufacturing Algorithm design and analysis Synchronous motors

来源：评论

学校读者我要写书评

暂无评论

Integrated design and optimization of microelectronic devices

Integrated design and optimization of microelectronic device...

引用

IEEE conference on Aerospace

作者： T. Cwik G. Klimeck Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA

A genetic algorithm is used for design of infrared filters and in the understanding of the material structure of a resonant tunneling diode. These two components are examples of microdevices and nanodevices that can be numerically simulated using fundamental mathematical and physical models. Because the number of parameters that can be used in the design of one of these devices is large, and because experimental exploration of the design space is unfeasible, reliable software models integrated with global optimization methods are examined. The genetic algorithm and engineering design codes have been implements on massively parallel computers to exploit their high performance. Design results are presented for the infrared filter and a resonant tunneling diode.

关键词： Design optimization Microelectronics Genetic algorithms Algorithm design and analysis Filters Resonant tunneling devices Diodes Numerical simulation Mathematical model optimization methods

来源：评论

学校读者我要写书评

暂无评论

Automatic unit test data generation using mixed-integer linear programming and execution trees

Automatic unit test data generation using mixed-integer line...

引用

International conference on software Maintenance (ICSM)

作者： S. Lapierre E. Merlo G. Savard G. Antoniol R. Fiutem P. Tonelia Quality Engineering and Research Group Bell Canada Limited Montreal QUE Canada GEGI École Polytechnique Montreal QUE Canada IRST-Istituto per la Ricerca Scientifica e Technologica Trento Italy

This paper presents an approach to automatic unit test data generation for branch coverage using mixed-integer linear programming, execution trees, and symbolic execution. This approach can be useful to both general testing and regression testing after software maintenance and reengineering activities. Several strategies, including original algorithms, to move towards practical test data generation have been investigated in this paper. Methods include: the analysis of minimum path-length partial execution trees for unconstrained arcs, thus increasing the generation performance and reducing the difficulties originated by infeasible paths the reduction of the difficulties originated by nonlinear path conditions by considering alternative linear paths the reduction of the number of test cases, which are needed to achieve the desired coverage, based on the concept of unconstrained arcs in a control flow graph the extension of symbolic execution to deal with dynamic memory allocation and deallocation, pointers and pointers to functions system. Preliminary results are encouraging and show that a high percentage of the program branches can be covered by the test data automatically produced. The approach is flexible to branch selection criteria coming from general testing as well as regression testing.

关键词： Automatic testing software testing Linear programming software maintenance performance analysis System testing Automatic generation control nonlinear control systems Control systems Flow graphs

来源：评论

学校读者我要写书评

暂无评论

Common-case computation: a high-level technique for power and performance optimization

Common-case computation: a high-level technique for power an...

引用

Design Automation conference

作者： G. Lakshminarayana A. Raghunathan K.S. Khouri N.K. Jha S. Dey C CRL NEC-USA Inc. USA Department of Electrical Engineering Princeton University USA Department of Electrical Engineering University of California San Diego USA

This paper presents a design methodology, called common-case computation (CCC), and new design automation algorithms for optimizing power consumption or performance. The proposed techniques are applicable in conjunction with any high-level design methodology where a structural register-transfer level (RTL) description and its corresponding scheduled behavioral (cycle-accurate functional RTL) description are available. It is a well-known fact that in behavioral descriptions of hardware (also in software), a small set of computations (CCCs) often accounts for most of the computational complexity. However, in hardware implementations (structural RTL or lower level), CCCs and the remaining computations a typically treated alike. This paper shows that identifying and exploiting CCCs during the design process can lead to implementations that are much more efficient in terms of power consumption or performance. We propose a CCC-based high-level design methodology with the following steps: extraction of common-case behaviors and execution conditions from the scheduled description, simplification of the common-case behaviors in a stand-alone manner, synthesis of common-case detection and execution circuits from the common-case behaviors, and composing the original design with the common-case circuits, resulting in a CCC-optimized design. We demonstrate that CCC-optimized designs reduce power consumption by up to 91.5%, or improve performance by up to 76.6% compared to designs derived without special regard for CCCs.

关键词： high performance computing Design methodology Design optimization Energy consumption Processor scheduling Circuit synthesis Design automation Hardware Algorithm design and analysis Permission

来源：评论

学校读者我要写书评

暂无评论

A fast segmentation algorithm for bi-level image compression using JBIG2

A fast segmentation algorithm for bi-level image compression...

引用

IEEE International conference on Image Processing

作者： D.A.D. Tompkins F. Kossentini Signal Processing and Multimedia Group Department of Electrical and Computer Engineering University of British Columbia Vancouver BC Canada

The emerging JBIG2 standard allows compliant encoders to achieve very high compression rates on bi-level images, especially when images are properly segmented into regions of line-art, halftones and text. We propose a fast method that is very effective at separating text from non-text regions, even when the regions are nonrectangular or have skew. Our method can also detect regions of reverse-coloured text. In most cases, our method increases the compression performance of the encoder. More importantly, our method can improve encoding speeds considerably, often by an order of magnitude.

关键词： Image segmentation Image coding Facsimile Dictionaries Optical character recognition software Signal processing algorithms Decoding Gray-scale Internet optimization methods

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：