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Cover Picture: Large‐Area 3D Nanostructures with Octagonal Quasicrystalline Symmetry via Phase‐Mask Lithography (Adv. Mater. 10/2007)

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Advanced Materials 2007年第10期19卷

作者： I. Bita T. Choi M. E. Walsh H. I. Smith E. L. Thomas Department of Materials Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 (USA) Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 (USA) Present address: Lumarray Inc. 15 Ward St Somerville MA 02143 USA

A novel method for producing large‐area 3D nanostructured quasicrystalline materials uses 2D multiple exposure lithography to produce an octagonal quasiperiodic surface‐relief template (background image). A replica in polydimethylsiloxane is then used as a phase mask to create 3D bicontinuous axial quasicrystalline SU‐8 epoxy nanostructures (see insets), as reported on p. 1403 by Ion Bita, Edwin Thomas, and co‐workers.

关键词： Lithography Nanostructures, metal Photonic materials Silica Template‐directed assembly

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Inside Front Cover: Buckled and Wavy Ribbons of GaAs for High‐Performance Electronics on Elastomeric Substrates (Adv. Mater. 21/2006)

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Advanced Materials 2006年第21期18卷

作者： Y. Sun V. Kumar I. Adesida J. A. Rogers Department of Materials Science and Engineering Beckman Institute and Frederick Seitz Materials Research Laboratory University of Illinois at Urbana‐Champaign Urbana IL 61801 USA Present address: Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA Department of Electrical and Computer Engineering Micro and Nanotechnology Laboratory University of Illinois at Urbana‐Champaign Urbana IL 61801 USA

Stretchable single‐crystalline GaAs nanoribbons and stretchable electronic devices fabricated with these ribbons are reported on p. 2857 by Sun, Rogers, and co‐workers. The inside cover shows an array of ‘wavy' GaAs nanoribbons (background) sitting on an elastomeric poly(dimethylsiloxane) (PDMS) support. Wavy and buckled ribbons integrated with metal electrodes (foreground inset) enable high‐performance, fully stretchable electronics, i.e., metal–semiconductor field‐effect transistors.

关键词： Elastomers Electronics Flexible electronics Thin films, inorganic Transistors

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SIMULATION OF FEEDBACK-FREE CIRCUITS IN THE ALGEBRA OF TRANSIENTS

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International Journal of Foundations of computer science 2003年第6期14卷 1033-1054页

作者： MIHAELA GHEORGHIU JANUSZ BRZOZOWSKI School of Computer Science University of Waterloo Waterloo Ontario Canada N2L 3G1 Canada Present address: Department of Computer Science and Engineering University of Nebraska-Lincoln Lincoln NE 68588 USA.

An efficient simulation algorithm using an algebra of transients for gate circuits was proposed by Brzozowski and Ésik. This algorithm seems capable of predicting all the signal changes that can occur in a circuit under worst-case delay conditions. We verify this claim by comparing simulation with binary analysis. For any feedback-free circuit consisting of one- and two-input gates, we prove that all signal changes predicted by simulation occur in binary analysis, provided that wire delays are taken into account. Two types of finite automata play an important role in our proof.

关键词： algebra automaton circuit hazard simulation transient

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Universal System for Buildings Automation

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IFAC Proceedings Volumes 2003年第1期36卷 19-24页

作者： Vit Lukas Jiri Koziorek Department of Measurement and Control Faculty of Electrical Engineering and Computer Science VŠB - Technical University of Ostrava Address: 17. listopadu No. 15 70833 Ostrava-Poruba Czech Republic

This contribution is dealing with the problems of distributed systems for the building control. The universal system for building automation being developed in department of Measurement and Control, VSB-TU Ostrava is described here. The system makes use of the communication network Lonworks and serves for control and mutual interconnection of the building technical equipment. In the frrst part of the contribution the technologies used in the building control sphere are decribed. In the second part the system being developed and laboratory model, on which the system is applied, are described.

关键词： automation communication networks control technology microprocessor control control system design

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Expert computer knowledge-based methodology using fuzzy sets for evaluating water conservation programs in Jordan

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Clean Technologies and Environmental Policy 2002年第4期4卷 257-263页

作者： Odeh Al-Jayyousi Rustom Mamlook Civil Engineering Department Applied Science University Amman Jordan 11931 Jordan Department of Electrical and Computer Engineering Applied Science University Amman Jordan 11931 Jordan Present address: Computer Science Department Zarka Private University P.O. Box 2000 Zarka Jordan 13110 Jordan

This paper aims to devise a new methodology for evaluating water conservation programs based on expert computer knowledge-based systems and fuzzy set analyses. computer-programmed surveys were carried out on a random sample of water users in Amman City, Jordan, before and after they received water educational material. Relative weights were given for each response and a cumulative grade was estimated. The follow-up surveys reveal that a reasonable rise of water-related knowledge is achieved after respondents are exposed to water educational material. Fuzzy set analyses reveal that some fluctuations in the relative rise of public awareness programs may be attributed to insufficient knowledge. The fuzzy set logic technique enabled us to condense a great many data into a small set of variable rules. This in turn made our expert system effective in evaluating water conservation programs.

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Control strategy development for high speed servo-pneumatic actuator systems

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IFAC Proceedings Volumes 1999年第2期32卷 8675-8680页

作者： Jihong Wang Philip R Moore Junsheng Pu Current address: Department of Electrical Engineering and Electronics The University of Liverpool Brownlow Hill Liverpool L69 3GJ UK Mechatronics Research Group Faculty of Computer Science and Engineering De Montfort University Leicester LE1 9BH UK

A servo control strategy for high speed servo-pneumatic actuator systems is developed, which has the following main features: (1) delay-time minimisation; (2) null-offset deadband compensation; (3) acceleration feedback; (4) gain scheduling; (5) target position compensation algorithm. Applying the control strategy with above named main features, the servo-pneumatic actuation is capable of high speed point-to-point positioning. With the applications and system configurations investigated, velocity of up to 4m/s and accelerations above 4g can be demonstrated. The repeatability attainable is a function of the feedback mechanism and application configuration (±0.25mm or better has been demonstrated). The control strategy is initially developed based on a platform of 32bit DSP and then a cut-down version of the control algorithm has been implemented in a 16-bit microprocessor based motion control platform.

关键词： pneumatic systems servo systems nonlinear control PID control algorithms

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A new nonlinear system control method using second order derivatives of universal learning network

A new nonlinear system control method using second order der...

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IEEE International Conference on Systems, Man and Cybernetics

作者： K. Hirasawa M. Ohbayashi M. Hashimoto Jinglu Hu J. Murata Department of Electrical and Electronic Systems Engineering Kyushu University Japan At present Department of Computer Science and Systems Engineering Yamaguchi University Japan

Universal learning networks (ULNs) have been proposed, which are a super set of any kinds of supervised learning networks. One of the important features of the ULNs is that the ULNs have a systematic algorithm for calculating higher order derivatives of the criterion function with respect to parameters. Both robust control and chaos control methods using the second order derivatives of the ULNs have also been proposed. In this paper, a new control design method of the nonlinear systems is proposed, which is an extension of the above robust control method in terms of the stability as well as the quick response of the systems.

关键词： Nonlinear systems Nonlinear control systems Control systems Robust control Control design Chaos Neural networks Damping Delay effects Input variables

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Geosheet

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International Journal of Computational Geometry & Applications 1998年第2期8卷 119-155页

作者： D. T. Lee Chin-Fang Shen Dennis S. Sheu Department of Electrical and Computer Engineering Northwestern University Evanston Illinois 60208 USA Research also supported by the National Science Foundation under the Grant CCR-9309743. Current address: Avant! Corporation 46871 Bayside Parkway Fremont CA 94538. Current address: ZEXEL Innovation 1249 Innsbruck Dr. Sunnyvale CA 94089.

GeoSheet (version 1.0) is an interactive visualization tool for visualizing geometric algorithms in distributed environments. It provides features such as interactive visualization of program states for debugging, high-level graphical input/output manipulation facilities for geometric objects, reuse of existing data structures and algorithms implementation, and more importantly distributed executions on heterogeneous machines at different sites. To minimize development effort of the tool we make use of existing software packages available in public domain. Specifically we extend Xfig with a message-driven interface and a socket-based interprocess communication (IPC) mechanism. This extended -Xfig is the backbone of this version of the tool. Object-oriented programming methodology is used to construct the visualization interface. By deriving from traditional data type and algorithm libraries, our abstract GeoObject representation super-classes are easy to use, easy to construct, and highly portable. Although GeoSheet is not restricted to a particular application domain or any programming language, this release only contains geometric algorithm implementations in C++ and LEDA. We hope that the geometric algorithm designers will find it useful when they develop their algorithms.

关键词： Visualization geometric computing objected-oriented programming X windows distributed environment

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Wafer Fusion for Surface-Normal Optoelectronic Device Applications

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International Journal of High Speed Electronics and Systems 1997年第2期8卷 357-376页

作者： Dubravko I. Babić John. E. Bowers Evelyn L. Hu Long Yang Kent Carey Department of Electrical and Computer Engineering University of California Santa Barbara CA 93106-9560 USA Present Address: Hewlett-Packard Laboratories 8500 Deer Creek Road Buiding 26M-9 Palo Alto CA 94304 USA. Hewlett-Packard Laboratories 8500 Deer Creek Road Building 26M-9 Palo Alto CA 94304 USA

This paper discusses the issues connected with the application of fusion bonding technology for surface-normal optoelectronic devices (III-V semiconductors). The InP/GaAs fusion bonding technology employed in the deve...

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CARBON-DOPED HBTs FOR OEICs (Invited)

CARBON-DOPED HBTs FOR OEICs (Invited)

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1995 4th International Conference on Solid-State and Integrated Circuit Technology

作者： G.E.STILLMAN M.FENG M.A.FRESINA Q.J.HARTMANN D.A.AHMARI P.J.MARES S.THOMAS S.A.STOCKMAN S.L.JACKSON Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign present address: Hewlett Packard San Jose CA 95131 present address: Hewlett Packard San Jose CA 95131

Carbon base doping for high performance HBTs promises higher reliability, but the growth techniques must be optimized so that the hydrogen passivation of C acceptors inherent in suitable epitaxial growth techniques do... 详细信息

关键词： Invited CARBON-DOPED HBTs FOR OEICs

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