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检索条件"任意字段=Digital Human Modeling for Design and Engineering Symposium"

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modeling of substrate noise block properties for early prediction

Modeling of substrate noise block properties for early predi...

引用

IEEE International symposium on Circuits and Systems (ISCAS)

作者： G. Blakiewicz M. Chrzanowska-Jeske Department of Microelectronic Systems Gdansk University of Technology Gdansk Poland Electrical & Computer Engineering Portland State University Portland USA

We propose a new approach to substrate noise modeling in early design planning of mixed-signal systems-on-chips (MS-SOCs). It can be applied to a system without any detailed knowledge (physical-layout) about its building blocks. We assume and justify that, in early prediction, only the most significant noise sources of substrate noise need to be considered. To capture important properties of substrate noise we consider the frequency-dependent sensitivity of analog blocks and a noise injection model for noisy digital blocks. We use experimental substrate noise simulations to build our models, and give suggestions on how to estimate noise parameters for building blocks of MS-SOC.

关键词： Predictive models Substrates Semiconductor device noise Circuit noise Integrated circuit noise Frequency Integrated circuit reliability Microelectronics design engineering Technology planning

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A suite of visual languages for statistical survey specification

A suite of visual languages for statistical survey specifica...

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IEEE symposium on Visual Languages and human Centric Computing (VL/HCC)

作者： Chul Hwee Kim J. Hosking J. Grundy Department of Computer Science University of Auckland Auckland New Zealand Department of Electrical and Computer Engineering University of Auckland Auckland New Zealand

We describe SDL, an integrated suite of visual languages aimed at supporting the process of designing statistical surveys. SDL comprises four diagrammatic notations: survey diagrams, survey data diagrams, survey analysis diagrams and survey process diagrams. A proof of concept environment supporting SDL is also presented, together with a cognitive dimensions evaluation of that environment and a cognitive walkthrough evaluation with a target end user - a professional statistician. These demonstrate the utility of SDL and lead us to propose development of a more comprehensive environment supporting the entire statistical survey process.

关键词： Data analysis Process design Unified modeling language design engineering Books Sampling methods Synthetic aperture sonar Software design Information analysis Performance analysis

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An 800 Mbps system interconnect modeling and simulation for high speed computing

An 800 Mbps system interconnect modeling and simulation for ...

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IEEE International symposium on Circuits and Systems (ISCAS)

作者： M.S. Sharawi D.N. Aloi Electrical and System Engineering Oakland University Rochester MI USA

System interconnect modeling for high speed systems is a vital bottleneck for high speed data transfer. We demonstrate the modeling process on a high speed computer differential net running at 400 MHz (800 Mbit/s) with IBM I/O cells. The modeling of the traces on the boards was done using a field solver. The transmission line matrices were used in a SPICE model, and 3-simulation scenarios were tested for this model. The obtained EYE opening of the modeled interconnect simulation was 705 mV while the measured EYE opening for the same net topology in the laboratory was 710 mV. This shows a close match between the actual behavior and the model generated. Careful modeling can be very beneficial to get a design running at first time operation.

关键词： Computational modeling Integrated circuit interconnections Personal digital assistants Frequency Connectors Electromagnetic modeling Power cables Driver circuits Wire Etching

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A new method for design of robust digital circuits

A new method for design of robust digital circuits

引用

IEEE International symposium on Quality Electronic design

作者： D. Patil S. Yun S.-J. Kim A. Cheung M. Horowitz S. Boyd Department of Electrical Engineering University of Stanford Stanford CA USA

As technology continues to scale beyond 100 nm, there is a significant increase in performance uncertainty of CMOS logic due to process and environmental variations. Traditional circuit optimization methods assuming deterministic gate delays produce a flat "wall" of equally critical paths, resulting in variation-sensitive designs. This paper describes a new method for sizing of digital circuits, with uncertain gate delays, to minimize their performance variation leading to a higher parametric yield. The method is based on adding margins on each gate delay to account for variations and using a new "soft maximum" function to combine path delays at converging nodes. Using analytic models to predict the means and standard deviations of gate delays as polynomial functions of the device sizes, we create a simple, computationally efficient heuristic for uncertainty-aware sizing of digital circuits via geometric programming. Monte-Carlo simulations on custom 32 bit adders and ISCAS'85 benchmarks show that about 10 % to 20 % delay reduction over deterministic sizing methods can be achieved, without any additional cost in area.

关键词： design methodology Robustness digital circuits Delay CMOS technology Uncertainty CMOS process CMOS logic circuits Circuit optimization Solid modeling

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Microfabrication and characterization of evolutionary MEMS resonators

Microfabrication and characterization of evolutionary MEMS r...

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International symposium on Micromechatronics and human Science (MHS)

作者： R. Kamalian Ying Zhang A.M. Agogino Faculty of Design Kyushu University Fukuoka Japan Department of Mechanical Engineering University of California Berkeley Berkeley CA USA

Microelectromechanical resonators have been fabricated using the MUMPs process, and characterized. The results of this characterization study are used to provide valuable feedback to improve our MEMS design tool based on the use of evolutionary synthesis algorithms known as genetic algorithms. This tool automatically generates designs that meet the user's performance goals and design constraints. To provide the necessary material property and fabrication parameters required to predict design performance, test designs for a range of performance goals and constraint settings were fabricated and characterized. We report the results of this characterization and validation experiment. design characteristics that lead to accurate performance prediction are identified and the causes for inaccurate modeling are also discussed

关键词： Micromechanical devices Fabrication Algorithm design and analysis Testing Material properties Leg Resonant frequency Predictive models Geometry Resonance

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design, simulation and synthesis of a 32-bit math-processor

Design, simulation and synthesis of a 32-bit math-processor

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Midwest symposium on Circuits and Systems (MWSCAS)

作者： S. Ardalan A. Adibi Electrical and Computer Engineering Department University of Waterloo Waterloo Canada Electrical Engineering Department Amirkabir University of Technology슠 Tehran Iran

This paper presented the design and results of simulation and synthesis of a 32-bit math-processor. The emphasis was placed on implementation of floating-point arithmetic unit. This math-processor is designed in fully behavioral level by using VHDL and is able to perform floating-point operation on double precision. Also as nature of behavioral description, it is easy to convert the precision to 64-bit or more. The main ALU includes four separate ALUs: sign ALU, integer number ALU, mantissa and exponent ALU (for real number). This processor uses the micro-controlling method for control unit. This behavioral design is synthesis-able and ready for layout and fabrication or FPGA based digital circuits. Synthesis was done by Leonardo Exemplar tool and it shows this design includes 27000 standard cells and can work on 40 MHz clock in 1mum CMOS technology

关键词： Computational modeling Hardware Computer simulation Circuit synthesis CMOS technology Computer aided instruction Central Processing Unit design engineering Floating-point arithmetic Fabrication

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Development of a 2 degrees of freedom tracking system. Part III: system modeling

Development of a 2 degrees of freedom tracking system. Part ...

引用

International Conference on Emerging Technologies, ICET

作者： S.A. Hassan I. Askari M.S. Fareed K. Munawar M.B. Malik College of Electrical and Electronic Engineering Huazhong University of Science and Technology Rawalpindi Pakistan

The problem of tracking moving objects using a moving camera in real time is a complex one which requires a highly stable platform and a robust control algorithm. This paper is a continuation of our previous papers in which we discussed the design and digital control routine of a 2DOF stable platform with coupled joint. In the previous paper we implemented a non-model based PI controller that proved sufficient for static targets, however for image based tracking, a number of non-linear forces are affecting the system and such scenarios require model-based controllers. The design of model based controller starts with model selection and then the estimation of its parameters. In this paper we deal with the modeling and parameters estimation of a 2 DOF platform using the least squares method.

关键词： modeling Azimuth Parameter estimation Predictive models Nonlinear control systems Equations Torque MIMO Educational institutions Mechanical engineering

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modeling and formal verification of dataflow graph in system-level design using Petri net

Modeling and formal verification of dataflow graph in system...

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IEEE International symposium on Circuits and Systems (ISCAS)

作者： Tsung-Hsi Chiang Lan-Rong Dung Ming-Feng Yaung Department of Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)0780388348

Formal verification at system-level, which also means architecture verification, is different from functional verification at RTL level. DSP algorithms need high-level transformation to achieve optimal goals before mapping onto silicon. However, a suitable CAD tool is absent to support the simulation and verification at high-level. This paper presents a novel modeling and high-level verification methodology based on a Petri net (PN) model. By the proposed method, a DSP algorithm system in the form of FSFG (fully specified flow graph) is transformed into a PN model. Moreover, verification methods which include static and dynamical phases are applied in the PN domain. Finally, we introduce our software implementation, called HiVED, to show the experimental results.

关键词： Formal verification System-level design Scheduling algorithm digital signal processing Dynamic scheduling Control engineering Silicon Hardware Circuit faults Very large scale integration

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human-body coil design for magnetic resonance imaging at 7 tesla

Human-body coil design for magnetic resonance imaging at 7 t...

引用

Antennas and Propagation Society International symposium

作者： R. Abraham T.S. Ibrahim School of Electrical and Computer Engineering and Center for Bioengineering University of Oklahama Norman OK USA

In this paper, we propose a design of a 7 Tesla magnetic resonance imaging (MRI) whole-body coil. We describe some important features of the coil, both from a mechanical and electromagnetic perspective. We show the results of optimizing the coil's excitation sources in a near-field phased-array manner that minimizes the standard deviation of the circularly polarized component of the transverse magnetic field, which is responsible for exciting the spins, across various cross-sections of the human body. Successful optimizations of full cross-sectional slices of the body located in the coil, as well as optimizations useful for localized imaging of a particular organ (in this case chosen to be the liver), are provided. By demonstrating the dramatic improvement in the performance of this coil utilizing the proposed complex excitation system, we show that whole-body 7 Tesla coil is physically feasible as well as probable, demonstrating great potential for future clinical and research imaging applications

关键词： Magnetic resonance imaging Coils humans Biological system modeling Radio frequency Biological tissues High-resolution imaging Finite difference methods design engineering Biomedical engineering

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Macro-modeling of non-linear pre-emphasis differential driver circuits

Macro-modeling of non-linear pre-emphasis differential drive...

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Microwave, MTT-S International symposium

作者： B. Mutnury M. Swaminathan M. Cases N. Pham D. de Araujo E. Matoglu School of Electrical and Computer Engineering Georgia Institute of technology Atlanta GA USA XSeries eServer Development Austin TX USA

Differential signaling has become important in high speed digital and mixed signal systems because of its numerous advantages over single-ended signaling. Differential signaling reduces effects like simultaneous switching noise (SSN), electro magnetic interference (EMI) and crosstalk coupling. Signal integrity (SI) and timing analysis using differential drivers is computationally exhaustive due to increased complexity in design that includes features such as pre-compensation and slew rate control. Therefore, accurate macro-modeling of differential driver circuits for a quality design is a huge challenge. In this paper, a modeling technique based on recurrent neural network (RNN) is proposed to model differential driver circuits with and without pre-emphasis. Good accuracy is obtained in the test cases shown for the proposed modeling methodology at minimum computational cost.

关键词： Driver circuits Crosstalk Recurrent neural networks Magnetic switching Noise reduction Circuit noise Magnetic noise Electromagnetic interference Coupling circuits Timing

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