检索结果-内蒙古大学图书馆

17th Annual Conference on Neural Information Processing Systems, NIPS 2003

作者： Shi, Rock Z. Horiuchi, Timothy Electrical and Computer Engineering Department University of Maryland College Park MD 20742 United States Institute for Systems Research University of Maryland College Park MD 20742 United States Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 United States

ISBN: (纸本)0262201526

Synapses are a critical element of biologically-realistic, spike-based neural computation, serving the role of communication, computation, and modification. Many different circuit implementations of synapse function exist with different computational goals in mind. In this paper we describe a new CMOS synapse design that separately controls quiescent leak current, synaptic gain, and time-constant of decay. This circuit implements part of a commonly-used kinetic model of synaptic conductance. We show a theoretical analysis and experimental data for prototypes fabricated in a commercially-available 1.5μm CMOS process.

关键词： CMOS integrated circuits

来源：评论

学校读者我要写书评

暂无评论

A low-power CMOS neural amplifier with amplitude measurements for spike sorting

A low-power CMOS neural amplifier with amplitude measurement...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： T. Horiuchi T. Swindell D. Sander P. Abshier Institute for Systems Research Neuroscience and Cognitive Science Program University of Maryland College Park MD USA Electrical and Computer Engineering Department University of Maryland College Park MD USA Electrical and Computer Engineering Department Electrical Engineering Department Pennsylvania State University State College PA USA

Integrated, low-power, low-noise CMOS neural amplifiers have recently grown in importance as large microelectrode arrays have begun to be practical. With an eye to a future where thousands of signals must be transmitted over a limited bandwidth link or be processed in situ, we are developing low-power neural amplifiers with integrated pre-filtering and measurements of the spike signal to facilitate spike-sorting and data reduction prior to transmission to a data-acquisition system. We have fabricated a prototype circuit in a commercially-available 1.5 /spl mu/m, 2-metal, 2-poly CMOS process that occupies approximately 91,000 square /spl mu/m. We report circuit characteristics for a 1.5 V power supply, suitable for single cell battery operation. In one specific configuration, the circuit bandpass filters the incoming signal from 22 Hz to 6.7 kHz while providing a gain of 42.5 dB. With an amplifier power consumption of 0.8 /spl mu/W, the rms input-referred noise is 20.6 /spl mu/V.

关键词： Sorting Signal processing Low-noise amplifiers Microelectrodes Bandwidth Integrated circuit measurements Prototypes CMOS process Power supplies Batteries

来源：评论

学校读者我要写书评

暂无评论

Vehicle detection and tracking using acoustic and video sensors

Vehicle detection and tracking using acoustic and video sens...

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： R. Chellappa Gang Qian Qinfen Zheng Center for Automation Research Institute for Advanced Computer Studies University of Maryland College Park MD USA Department of Electrical Engineering and Arts Media and Engineering Program Arizona State University Tempe AZ USA

Multimodal sensing has attracted much attention in solving a wide range of problems, including target detection, tracking, classification, activity understanding, speech recognition, etc. In surveillance applications, different types of sensors, such as video and acoustic sensors, provide distinct observations of ongoing activities. We present a fusion framework using both video and acoustic sensors for vehicle detection and tracking. In the detection phase, a rough estimate of target direction-of-arrival (DOA) is first obtained using acoustic data through beam-forming techniques. This initial DOA estimate designates the approximate target location in video. Given the initial target position, the DOA is refined by moving target detection using the video data. Markov chain Monte Carlo techniques are then used for joint audio-visual tracking. A novel fusion approach has been proposed for tracking, based on different characteristics of audio and visual trackers. Experimental results using both synthetic and real data are presented. Improved tracking performance has been observed by fusing the empirical posterior probability density functions obtained using both types of sensors.

关键词： Vehicle detection Acoustic sensors Target tracking Direction of arrival estimation Object detection Multimodal sensors Speech recognition Surveillance Acoustic signal detection Phase detection

来源：评论

学校读者我要写书评

暂无评论

A summating, exponentially-decaying CMOS synapse for spiking neural systems 03

A summating, exponentially-decaying CMOS synapse for spiking...

引用

Proceedings of the 17th International Conference on Neural Information Processing Systems

作者： Rock Z. Shi Timothy Horiuchi Electrical and Computer Engineering Department University of Maryland College Park MD and Institute for Systems Research University of Maryland College Park MD Electrical and Computer Engineering Department University of Maryland College Park MD and Institute for Systems Research University of Maryland College Park MD and Neuroscience and Cognitive Science Program University of Maryland College Park MD

关键词：

来源：评论

学校读者我要写书评

暂无评论

Holistic approach for technology entrepreneurship education in engineering

Holistic approach for technology entrepreneurship education ...

引用

Frontiers in Education (FIE) Conference

作者： D.F. Barbe S.A. Magids K.S. Thornton Maryland Technology Enterprise Institute and the Department of Electrical and Computer Engineering University of Maryland College Park MD USA Maryland Technology Enterprise Institute University of Maryland College Park MD USA Maryland Technology Enterprise Institute Hinman CEOs Program University of Maryland College Park MD USA

This paper discusses a comprehensive strategic approach being carried out by the A. James Clark School of engineering at the University of Maryland for facilitating technology entrepreneurship for undergraduate and graduate students as well as faculty in diverse technical disciplines. Our objectives are to foster an increasingly entrepreneurial culture that helps students and faculty understand the fundamentals and feasibility of forming technology enterprise, to help them establish and manage sustainable ventures and to accelerate commercialization of technologies developed on campus.

关键词： Educational technology Innovation management Business Educational institutions Technology management engineering management Robustness Acceleration Commercialization engineering students

来源：评论

学校读者我要写书评

暂无评论

Adaptation of current signals with floating-gate circuits

Adaptation of current signals with floating-gate circuits

引用

作者： Pesavento, Alberto Horiuchi, Timothy Diorio, Chris Koch, Christof Department of Electrical Engineering California Institute of Technology Pasadena CA 91125 United States Department of Electrical and Computer Engineering University of Maryland College Park MD 20742 United States Department of Computer Science and Engineering University of Washington Seattle WA 98195-2350 United States Computation and Neural Systems Program California Institute of Technology Pasadena CA 91125 United States

In this paper we present a new, adaptive spatial-derivative circuit for CMOS image sensors. The circuit removes its offset as a natural part of its operation using a combination of electron tunneling and hot-electron injection to add or remove charge on a floating-gate of an auto-zeroing amplifier. We designed, fabricated and successfully tested a chip with the circuit. Test results show that the circuit reduces the offsets by more than an order of magnitude.

关键词： Image sensors

来源：评论

学校读者我要写书评

暂无评论

Applying fuzzy functions and sequential coordination to optimization of machinery arrangement and pipe routing

引用

NAVAL ENGINEERS JOURNAL 1998年第6期110卷 43-54页

作者： Wu, BC Young, GS Schmidt, W Choppella, K Dr. Bi-Chu Wu:received a PhD in Mechanical Engineering from the University of Maryland College Park in 1991. She has worked on projects involving naval architecture design optimization solid mechanics and database development. Presently a senwr engineer with Angle Incorporated Dr Wu's research interests are in design optimization and fuzzy logic applications. Dr. Gin-Shu Young: a senior engineer with Angle Incorporated holds a PhD in Mechanical Engineering from the University of Maryland College Park. As a guest researcher with National Institute of Standards and Technologies from 1990 to 1993 he worked on vision-based navigation for autonomous vehicles. His experience also includes applications of optimization fuzzy logic neural network and genetic algorithm methods to engineering system design Mr. William Schmidt:co-founded Angle Incorporated in 1990 and has served as Vice PresidentlChiefScientist during this tame. He holds a B.Sc. in Applied Science from the Naval Acadt?my and an M.Sc. in Physics from the Naval Post Graduate School. He has cner 20 years experience in technical leadership material and personnel management. He has led the application of computer aided design (CAD) and Product Model Information Exchange to the shipbuilding industry. His experience also includes leading the amlication of model based operational analysis to support the Live Fire Test Program for DDG 51 Class Destroyers. Mr. Krishna M. Choppella:is a Sofware Engineer at Eidea Laboratories Incotporated where he works on componentbased distributed enterpvise frameworks. He has been involved in creating data analysis tools for the US Nay by integrating CAD modeis databases and graphical front ends. His work in the Masters degree program in Mechanical Engineering at the University of Texas at Austin was in di0ddase.r spectroscopy of combustion products in porous-matri burners. He received his Bachelors degree in Electrical Engineering in India. He was a Research Associate at the Centre for Laser Technology and Project Engi

Ship design is often multidisciplinary involving several design elements with various types of objectives and constraints (O/C) some easily described as mathematical formulas, others better modeled as descriptive assertions. This paper describes a method based on fuzzy functions and an integrated performance index to model O/C using descriptive assertions to be used with mathematical formulas in optimization. Another issue addressed in this paper concerns the coordination of design elements when sequentially coupled, that is, when one leads the other and the performance of the follower depends greatly on the design of the leader. Based on neuro-fuzzy techniques, the method described here coordinates and optimizes sequentially coupled elements. The two methods are applied to machinery arrangement (MA) and pipe routing (PR). Preliminary models for optimization of MA and PR are described considering convenience, producibility: engine room size, interference and location as factors in the O/C set. Some test results from MA/PR applications are presented and discussed. The methods are generic and can be extended to other elements in ship design. They are mutually independent and may be used separately Two advantages of their use are an improvement in overall performance and a reduction in the need for redesign of elements.

关键词： Optimization

来源：评论

学校读者我要写书评

暂无评论

Semi-automatic construction of 3D medical image-segmentation processes

Semi-automatic construction of 3D medical image-segmentation...

引用

Visualization in Biomedical Computing 1994

作者： Higgins, William E. Reinhardt, Joseph M. Sharp, Werner L. Departments of Electrical Engineering Computer Science and Engineering and the Bioengineering Program Pennsylvania State University University ParkPA16802 United States

We describe a GUI-based system called INTERSEG that can define 3D radiological image-segmentation processes. Using INTERSEG's GUI interface, the user first defines interactively some problem cues, which specify a segmentation task. Then, INTERSEG uses the cues to automatically construct a process for the task. The process consists of automatic image-processing operations, such as image enhancement, image segmentation, shape analysis, and measurement. With other systems, the user must resort to trial-and-error experimentation to construct such processes. © 1994 SPIE. All rights reserved.

关键词： Image enhancement

来源：评论

学校读者我要写书评

暂无评论

MULTIDATABASE SYSTEMS - AN ADVANCED CONCEPT IN HANDLING DISTRIBUTED DATA

引用

ADVANCES IN computerS 1991年第C期32卷 149-200页

作者： HURSON, AR BRIGHT, MW Computer Engineering Program Department of Electrical Engineering The Pennsylvania State University University Park Pennsylvania

Multidatabases integrate the data from preexisting, heterogeneous local databases into a distributed environment, and present global users with transparent methods to use the total information in the system. This chapter describes the taxonomy of global information-sharing systems, multidatabase issues, multidatabse design choices, analysis of existing multidatabase systems, and the position of multidatabase systems in the taxonomy. Multidatabase language systems have no constraints on system size, but the tradeoff for achieving this is a multiple-data-source user paradigm and a more complex user interface. Multidatabase issues, such as site autonomy, differences in data representation, and concurrency control are also discussed in the chapter. Site autonomy is a major strength of multidatabases, yet it is also a major constraint on the global system design. Differences in data representation are many and varied, and resolving these differences is a major concern of the global system design. Global updates are a major current restriction in many systems, and the focus of much current research. To make multidatabase systems more useful and efficient, some deficiencies in existing prototypes must be resolved before they can evolve into commercial products, such as global concurrency control, global security, maintenance and administration, and error control and recovery. Multidatabase systems should begin to have a larger impact in the information-processing world as more powerful systems to become generally available in the near future.

关键词： Database Systems

来源：评论

学校读者我要写书评

暂无评论

Rapid design of testable, high-performance/capacity associative memories 2

Rapid design of testable, high-performance/capacity associat...

引用

2nd IEEE Symposium on Parallel and Distributed Processing, SPDP 1990

作者： Miller, P.M. Hurson, A.R. Computer Engineering Program Department of Electrical and Computer Engineering Pennsylvania State University University ParkPA16802 United States

ISBN: (纸本)0818620870

VLSI technology has created the opportunity for designers to develop special-purpose application-specific architectures based on associative processing techniques. However the diversity of these applications creates a need for a generalized methodology to quickly produce high-capacity associative chips with different functionalities. The paper introduces such a scheme for designing special-purpose content-addressable memories (CAMs). An overall CAM organization suitable for most special-purpose associative chips is presented and the design, layout, and performance of its modular components is discussed. An example CAM is examined to show the performance and area efficiency of CAMs designed using the proposed scheme. The paper also introduces an improved, highly compact theta -search associative cell. Finally, the testing of CAMs using this organization is discussed. © 1990 IEEE.

关键词： Associative storage

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：