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THEORETICAL AND EXPERIMENTAL STUDIES OF PUMP-INDUCED PROBE DEFLECTION IN A THERMAL MEDIUM

APPLIED OPTICS 1995年第18期34卷 3358-3366页

作者： MISRA, RM BANERJEE, PP []The authors are with the Department of Electrical Computer Engineering Optical Information Processing Laboratory University of Alabama in Huntsville Huntsville Alabama 35899.

We analyze the deflection of a probe beam because of pump-probe interaction in a high-absorbing thermal medium. We extend the existing theory by accounting for translation of a finite-width probe because of deflection within the nonlinear sample. We also provide expressions for the number of resolvable angles of the probe for possible applications of the setup as a beam deflector and study conditions for the maximization of the deflection angle and the resolution. We present experimental results obtained with a solution of chlorophyll in ethanol as the thermal medium.

关键词： Spectroscopy Absorption Liquids Beams Light heat carrier Spectrography absorption Thermal Deflection liquids BEAM Light DEFLECTION ANGLES

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Modelling of charging effects in plasma immersion ion implantation

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Nuclear Instruments & Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 1995年第1-2期96卷 435-435页

作者： En, W. Cheung, N.W. Plasma Assisted Materials Processing Laboratory Department of Electrical Engineering and Computer Sciences University of California Berkeley CA 94720 USA

The charging effects of plasma immersion ion implantation on several device structures is simulated. The simulations use an analytical model which couples the interaction of the plasma and IC devices during plasma implantation. The plasma model is implemented within the circuit simulator SPICE, which allows the model to uses all of the IC device models existing within SPICE. The model of the Fowler-Nordheim tunneling current through thin gate oxides of MOS devices is demonstrated, and shown how it can be used to quantify the damage induced. Charging damage is shown to be strongly affected by the device structure.

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GAP CONTROL IN THE FABRICATION OF QUANTUM-EFFECT DEVICES USING X-RAY NANOLITHOGRAPHY

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MICROELECTRONIC engineering 1995年第1-4期27卷 307-310页

作者： BURKHARDT, M SILVERMAN, S SMITH, HI ANTONIADIS, DA RHEE, KW PECKERAR, MC Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139.USA Nanoelectronics Processing Facility U.S. Naval Research Laboratory Washington D.C. 20375.USA

We report on recent advances in the fabrication of quantum-effect devices using x-ray nanolithography. A novel scheme for gap control during the mask replication process was developed that uses capacitance sensing in a feedback loop. The capacitance between two masks is measured and held constant through control of the pressure between them. This scheme can be used to maintain the masks at a gap as small as 1 mum, thus reducing penumbra and diffraction. This capacitive feedback method, used in mask-to-mask replication can, in principle, also be used for mask-to-substrate exposures and is thus an additional element in an x-ray nanolithography technology for sub-70 nm features.

关键词： X ray lithography

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Partially adaptive radar signal processing: The cross-spectral approach 29

Partially adaptive radar signal processing: The cross-spectr...

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29th Asilomar Conference on Signals, Systems and computers, ACSSC 1995

作者： Goldstein, J. Scott Kogon, Stephen M. Reed, Irving S. Williams, Douglas B. Holder, E. Jeff USAF Rome Laboratory RL/C3BA 525 Brooks Rd. Grifilss AFBNY13441-4505 United States Statistical Signal and Image Processing Laboratory Department of Electrical Engineering University of Southern California Los AngelesCA90089-2565 United States Digital Signal Processing Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332-0250 United States

ISBN: (纸本)0818673702

This paper is concerned with reducing the rank of the adaptive weight vector in radar array signal processing. The motivation for reducing the rank is that modern space-time processing requires many more weights than can be supported on airborne and spacesegment platforms. The loss incurred in partially adaptive radar processing is that the steady-state Wiener solution of the lower rank weight vector may not perform as well as the full rank solution. Hence, this paper will be concerned with the Wiener solution of partially adaptive radar arrays and compare the performance of principal component techniques with the recently developed crossspectral technique. © 1996 IEEE.

关键词： Array processing

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VLSI implementation of very-high-order FIR filters

VLSI implementation of very-high-order FIR filters

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： M.A. Soderstrand K. Al-Marayati Digital Signal Processing and Communications Laboratory Department of Electrical and Computer Engineering University of California Davis USA

Very-high-order FIR filters required for the new modulation schemes associated with wireless computer networks and cellular telephones can be implemented in VLSI circuitry using low-power CMOS technology and a novel application of Residue Number System (RNS) arithmetic. Through this approach 20-bit equivalent integer arithmetic can be obtained for filters with 8 to 256 taps with only a modest increase in hardware for filters above 8 taps. Simulations indicate that this new technique can increase dramatically the number of taps implemented on a single VLSI chip when compared with an FIR filter generated using FIRGEN.

关键词： Very large scale integration Finite impulse response filter CMOS technology computer networks Cellular networks Telephony Circuits Application software Digital arithmetic Hardware

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An efficient algorithm for DTMF decoding using the subband NDFT

An efficient algorithm for DTMF decoding using the subband N...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： S. Bagchi S.K. Mitra Department of Electrical and Computer Engineering Signal and Image Processing Laboratory University of California Santa Barbara CA USA

An algorithm based on the subband nonuniform discrete Fourier transform (SB-NDFT) is proposed for decoding dual-tone multi-frequency (DTMF) signals. To decode a DTMF signal, its energy at the eight DTMF frequencies must be determined by evaluating samples of the NDFT at these frequencies. In the proposed SB-NDFT algorithm, these NDFT samples are computed by decomposing the input signal into two subbands. Since DTMF signals occupy the low-frequency part of the telephone bandwidth, the higher subband can be discarded for a fast, approximate computation. A performance comparison between algorithms based on the NDFT, SB-NDFT, DFT, and SB-DFT shows that the SB-NDFT requires the lowest number of computations to attain a specified level of performance.

关键词： Decoding Frequency Discrete Fourier transforms Signal processing Image processing Laboratories Telephony Bandwidth Communication system signaling Telephone sets

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Motion field prediction and restoration for low bit-rate video coding

Motion field prediction and restoration for low bit-rate vid...

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IEEE International Conference on Image processing

作者： S.N. Efstratiadis M.G. Strintzis A.K. Katsaggelos Information Processing Laboratory Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece McCormick School of Engineering and Applied Science Department of EECS Northwestern University Evanston IL USA

Motion vector field (MVF) prediction methods are presented followed by a restoration method. These methods combined with a proposed motion compensated (MC) video coding scheme are suitable for low bit rate transmission. An expression is derived for the initial estimate of the working MVF based on the preceding MVF. Spatio-temporally adaptive regularization is applied using neighborhood information. The output MVF is used as the initial prediction estimate for a Kalman MVF restoration approach. By applying this method to both the encoder and decoder, the resulting MC MVF and image intensity temporal updates are coded and transmitted. The restoration method produces accurate estimates of the MVF, thus resulting in a significant transmission cost reduction. Experiments with standard video-conference image sequences demonstrate the improved performance of the proposed scheme.

关键词： Video coding Image restoration Prediction methods Bit rate Video compression Kalman filters Costs Image sequences Nonlinear optics Decoding

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Delay models for the sea-of-wires array synthesis system 95

Delay models for the sea-of-wires array synthesis system

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European Design and Test (ED&TC) Conference

作者： Ing-Yi Chen Geng-Lin Chen Sy-Yen Kuo Department of Electronic Engineering Chung Yuan Christian University Chungli Taiwan Digital Signal Processing Department Computer & Communication Laboratory ITRI Hsinchu Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9780818670398

This paper presents two simple, accurate and efficient delay models, the static delay model and the dynamic delay model, to support performance optimization of VLSI Sea-of-Wires Arrays (SWA). The SWA delay model treats each distributed gate as an attribute-based primitive gate with different internal and external connection wires. Instead of solving differential equations, the SWA model determines delays by lookup from a multi-dimensional table. Only a few microseconds of execution time are needed per gate. The propagation delay along a circuit path is the sum of the delay segments of distributed gates in the path. The critical path of an SWA design can be identified with an O(n) timing analysis algorithm. For most AHPL Benchmarks, the table-lookup method achieves 5 orders of magnitude speedup over SPICE for the same circuits with error margin less than 7%.< >

关键词： SPICE Circuit simulation Wires Signal synthesis Very large scale integration Algorithm design and analysis Timing Equations Delay effects Table lookup

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Temporal frame interpolation for stereoscopic sequences using object-based motion estimation and occlusion detection

Temporal frame interpolation for stereoscopic sequences usin...

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IEEE International Conference on Image processing

作者： N. Grammalidis D. Tzovarns M.G. Strintzis Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece Aristotle University of Thessaloniki Thessaloniki GR Inf. Processing Lab. Aristotelian Univ. of Thessaloniki Greece

Temporal frame interpolation techniques are presented, based on an object-based algorithm for 3-D motion estimation. This algorithm uses a joint estimation-segmentation scheme to minimize the displaced frame difference between a frame and its motion compensated prediction from the previous frame. Depth information is estimated beforehand from each stereo pair. Special attention is paid to the exploitation of occlusion information so as to improve the reconstruction quality of the interpolated frames. Experimental results are used to evaluate the performance of the proposed methods and to compare with more conventional frame interpolation techniques.

关键词： Interpolation Motion estimation Pixel Image reconstruction Motion detection Image segmentation Information processing Laboratories Bit rate HDTV

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Synthesis of buried oxide by plasma implantation with oxygen and water plasma

Synthesis of buried oxide by plasma implantation with oxygen...

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IEEE SOI-3D-Subthreshold Microelectronics Technology Unified Conference (S3S)

作者： J.B. Liu S.S.K. Iyer J. Min P.K. Chu R. Gronsky C. Hu N.W. Chueng Plasma Assisted Materials Processing Laboratory Department of Electrical Engineering and Computer sciences University of California Berkeley CA USA Department of Physics and Materials Science City University of Hong Kong Hong Kong China

Separation by plasma implantation of oxygen (SPIMOX) is a novel method for fabricating silicon-on-insulator (SOI) wafers. This method uses plasma immersion ion implantation (PIII) where the desired voltage of implant is applied to a wafer immersed in a plasma. SPIMOX is particularly suited for thin separation by implantation of oxygen (SIMOX) wafer fabrication. High implantation rates can be achieved in SPIMOX. A dose of nearly 10/sup 18/ cm/sup -2/ with an implant current density of 1 mA cm/sup -2/ can be achieved in 3 minutes of implantation time. The short implantation time and the simplicity of the implantation equipment makes it a potentially more economical method for fabricating SIMOX wafers. Moreover, the theoretical time for implantation remains constant in SPIMOX with increase in wafer size.

关键词： Oxygen Plasma immersion ion implantation Implants Plasma materials processing Plasma temperature Annealing Silicon Voltage Nuclear and plasma sciences Physics

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