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at fixed frequency
, 2005
"... Inverse medium scattering for the Helmholtz equation at fixed frequency This article has been downloaded from IOPscience. Please scroll down to see the full text article. ..."
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Inverse medium scattering for the Helmholtz equation at fixed frequency This article has been downloaded from IOPscience. Please scroll down to see the full text article.
Fixed Frequency
"... The Si570 XO/Si571 VCXO utilizes Silicon Laboratories ’ advanced DSPLL® circuitry to provide a lowjitter clock at any frequency. The Si570/Si571 are userprogrammable to any output frequency from 10 to 945 MHz and select frequencies to 1400 MHz with <1 ppb resolution. The device is programmed vi ..."
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via an I2C serial interface. Unlike traditional XO/VCXOs where a different crystal is required for each output frequency, the Si57x uses one fixedfrequency crystal and a DSPLL clock synthesis IC to provide anyfrequency operation. This ICbased approach allows the crystal resonator to provide
Fixed frequency
, 2007
"... Fixed Field Alternating Gradient accelerators (FFAGs) offer higher pulse repetition rates and acceptances than synchrotrons – and therefore much higher beam intensities. With a fixed magnetic field the rep rate is set by purely rf considerations, and can be several kHz, while the radially extended s ..."
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Fixed Field Alternating Gradient accelerators (FFAGs) offer higher pulse repetition rates and acceptances than synchrotrons – and therefore much higher beam intensities. With a fixed magnetic field the rep rate is set by purely rf considerations, and can be several kHz, while the radially extended
Homogenization of the Maxwell equations at fixed frequency
 SIAM J. Appl. Math
"... Abstract. The homogenization of the Maxwell equations at fixed frequency is addressed in this paper. The bulk (homogenized) electric and magnetic properties of a material with a periodic microstructure are found from the solution of a local problem on the unit cell by suitable averages. The material ..."
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Cited by 18 (7 self)
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Abstract. The homogenization of the Maxwell equations at fixed frequency is addressed in this paper. The bulk (homogenized) electric and magnetic properties of a material with a periodic microstructure are found from the solution of a local problem on the unit cell by suitable averages
The space complexity of approximating the frequency moments
 JOURNAL OF COMPUTER AND SYSTEM SCIENCES
, 1996
"... The frequency moments of a sequence containing mi elements of type i, for 1 ≤ i ≤ n, are the numbers Fk = �n i=1 mki. We consider the space complexity of randomized algorithms that approximate the numbers Fk, when the elements of the sequence are given one by one and cannot be stored. Surprisingly, ..."
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Cited by 855 (12 self)
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The frequency moments of a sequence containing mi elements of type i, for 1 ≤ i ≤ n, are the numbers Fk = �n i=1 mki. We consider the space complexity of randomized algorithms that approximate the numbers Fk, when the elements of the sequence are given one by one and cannot be stored. Surprisingly
Inverse Acoustic and Electromagnetic Scattering Theory, Second Edition
, 1998
"... Abstract. This paper is a survey of the inverse scattering problem for timeharmonic acoustic and electromagnetic waves at fixed frequency. We begin by a discussion of “weak scattering ” and Newtontype methods for solving the inverse scattering problem for acoustic waves, including a brief discussi ..."
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Cited by 1072 (45 self)
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Abstract. This paper is a survey of the inverse scattering problem for timeharmonic acoustic and electromagnetic waves at fixed frequency. We begin by a discussion of “weak scattering ” and Newtontype methods for solving the inverse scattering problem for acoustic waves, including a brief
Fixed Frequency Hysteresis Control based STATCOM
"... Abstract. The operation principle of STATCOM (Synchronous Static Compensator STATCOM) is analyzed. To improve STATCOM response speed, and to sustain the STATCOM main circuit switching device operating frequency stability, the direct current control method is introduced. Fixed frequency hysteresis c ..."
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Abstract. The operation principle of STATCOM (Synchronous Static Compensator STATCOM) is analyzed. To improve STATCOM response speed, and to sustain the STATCOM main circuit switching device operating frequency stability, the direct current control method is introduced. Fixed frequency hysteresis
FIXEDFREQUENCY RING CYCLOTRON (fRC) IN RIBF
"... In the RIBF project one main purpose is to supply high intense U beam of 350 MeV/u from the SRC. The fRC is a foursector roomtemperature ring cyclotron located between the RRC and the IRC in order to accelerate very heavy ion beams such as Xe and U up to 50.7 MeV/u. From a view of cost the fRC is ..."
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RC is operated with fixed frequency (55 MHz; harmonics number = 12). The fRC is under construction. It will be installed from june in 2005 and the first commission will be planned in September of
GPSless Low Cost Outdoor Localization For Very Small Devices
, 2000
"... Instrumenting the physical world through large networks of wireless sensor nodes, particularly for applications like environmental monitoring of water and soil, requires that these nodes be very small, light, untethered and unobtrusive. The problem of localization, i.e., determining where a given no ..."
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Cited by 994 (29 self)
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in these networks. In this paper, we review localization techniques and evaluate the effectiveness of a very simple connectivitymetric method for localization in outdoor environments that makes use of the inherent radiofrequency (RF) communications capabilities of these devices. A fixed number of reference points
Precomputed Radiance Transfer for RealTime Rendering in Dynamic, LowFrequency Lighting Environments
 ACM Transactions on Graphics
, 2002
"... We present a new, realtime method for rendering diffuse and glossy objects in lowfrequency lighting environments that captures soft shadows, interreflections, and caustics. As a preprocess, a novel global transport simulator creates functions over the object's surface representing transfer of ..."
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Cited by 472 (28 self)
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We present a new, realtime method for rendering diffuse and glossy objects in lowfrequency lighting environments that captures soft shadows, interreflections, and caustics. As a preprocess, a novel global transport simulator creates functions over the object's surface representing transfer
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