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...
详细信息
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.
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 imp...
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.
A new technique is presented for the characterization of impulsive interference with a-stable processes. The proposed model is constructed by estimating the a-stable distribution parameters using the empirical charact...
详细信息
We show that an archtypal nonlinear chaotic system can be interpreted as a first order anticausal IIR filter stimulated by iid Bernoulli noise. Based on this interpretation, we develop and characterize a number of est...
详细信息
We present a low bit rate multimode speech coding algorithm which applies a suitable spectral model and a custom quantization scheme to each frame according to the selected mode. For unvoiced speech, the spectrum is c...
详细信息
作者：
Lindskog, ErikSweden Presently Visiting
Northeastern University Department of Electrical and Computer Engineering Signal Processing Group Uppsala University BostonMA02115 United States
Suppression of co-channel interferers in a TDMA cellular phone system by the use of an antenna array is studied. Especially the problem of suppressing co-channel interferers that appear outside the training sequence i...
详细信息
A modified approach for computing the effective permittivity of a dielectric mixture has been applied to obtain the attenuation and phase shift of both horizontally and vertically polarized electromagnetic waves in th...
详细信息
A modified approach for computing the effective permittivity of a dielectric mixture has been applied to obtain the attenuation and phase shift of both horizontally and vertically polarized electromagnetic waves in the rain medium. This approach takes into consideration the distributions in raindrop sizes, shapes, and depolarization factors. The computed results agree well with those obtained from the more complicated Mie scattering theory. The differential attenuation and phase shift between horizontally and vertically polarized waves are also obtained using the proposed model and their calculated values compare favorably with available published results by Oguchi (oblate spheroid rain droplets) and Pruppacher and Pitter (deformed rain droplets). (C) 1995 John Wiley & Sons, Inc.
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 ...
详细信息
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.
This paper is concerned with reducing the rank of the adaptive weight vector in radar array signalprocessing. The motivation for reducing the rank is that modern space-time processing requires many more weights than ...
详细信息
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 a...
详细信息
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.
暂无评论