... absolute performance of suboptimal filters are achievable ... that are obtained from the adaptive filter. Lastly, an adaptive Kalman filtering procedure is ...
DTIC Science & Technology
... Title : Absolute, Extreme Ultraviolet Solar Spectral Irradiance Monitor (AESSIM). ... film filters to make absolute measurements of EUV radiation over a ...
... absolutely; and second, equal-spectrum filtering, where the ... GRAVITY, MEASUREMENT), GEODESICS, ELECTRIC FILTERS, LEAST SQUARES ...
... Airborne contamination is removed by a unique application of absolute filters with the filtered air being focused on the food whenever it is handled. ...
A filter system using at least two filter vessels with a plurality of filter elements having absolute filtration capability. The filter elements use a nominal filter of diatomaceous earth, or a Perlite filter aid precoat layer, an outer wire layer, an ...
Energy Citations Database
The performance of discrete suboptimal Kalman filters and discrete optimal adaptive filters can be analyzed by an error covariance matrix which is defined on the specific filtering structure. Iterative algorithms for calculating the absolute performance o...
National Technical Information Service (NTIS)
... AD0194103. Title : NONDESTRUCTIVE MEASUREMENT OF U-235 RETAINED IN ABSOLUTE AIR FILTERS. Corporate Author : ...
The experimental procedure which permit the evaluation of the contribution to the neutron flux originated by neutrons with energy lower than 14 MeV during the application of the absolute method when the irradiation geometry ca not be considered as an scat...
A frequency-agile narrowband microstrip bandstop filter technology able to maintain near constant absolute bandwidth while tuning over a frequency range of nearly an octave is described. The technology is demonstrated by a reconfigurable notch filter desi...
An absolute spectroradiometric scale has been developed based on an electrically calibrated absolute detector and silicon detector-interference filter combination. Using the recently adopted definition of the photometric base unit, the candela, the absolute spectroradiometric scale was used to realize a photometric ...
PubMed
is 256x256 in size. Average computation time for the decision- based filter (Matlab implementation) is 0 image, and the primal LP solution is retrieved as the filtered image. For solv- ing the MCF, we utilize. INTRODUCTION Median filter is one of the earliest non-linear filters in sig- nal and image processing. ...
E-print Network
Substantive change: define step 6 as absolute evaluation of ..... Red/Yellow/ Green metrics were applied to specific data rate values on the threshold filter ...
NASA Website
... the scalp are easily contaminated by stray electrical events. ... types of artifacts: (1) eyeblinks, (2) voltage spikrs, (3) large absolute voltages (4) large ...
Correction of sensory transmission delays is an intractable problem because there is no absolute reference for calibration. Phase alignment is a practical alternative solution and can be realized by adaptive filters that operate locally with simple error signals.
PubMed Central
Absolute efficiency of the NaI(Tl) 5 inch x 5 inch counter for a round filter paper was calculated using standard radioactive sources cesium-137, manganese-54 and cobalt-60. The calculated efficiency can be used in determining the activity of the mentione...
The necessity of controlling the efficiency of installed absolute filters and the importance of a correct choice of prefilters to lighten the load of dust are demonstrated by two examples. The investigations were made by the use of a particle cloud of sodium chloride labeled with radioactive sodium-24. The composition of the test cloud was ...
The luminous intensity unit of candela was realized based on filter-radiometer, which is traceable to detector-based primary standard electrical substitution cryogenic radiometer (ESCR). In that realization the traditional Osram Wi41/G-type incandescent lamp and filter-radiometer consisting of an aperture, a V(?) filter and a silicon ...
NASA Astrophysics Data System (ADS)
The removal of noise in image is one of the important issues, and useful as a preprocessing for edge detection, motion estimation and so on. Recently, many studies on the nonlinear digital filter for impulsive noise reduction have been reported. The median filter, the representative of the nonlinear filters, is very effective for ...
The Electron Beam Ion Trap (EBIT) facility at the Lawrence Livermore National Laboratory is being used to absolutely calibrate the transmission efficiency of x-ray filters employed by diodes and spectrometers used to diagnose laser-produced plasmas. EBIT emits strong, discrete monoenergetic lines at appropriately chosen x-ray energies. X rays are detected ...
The electron beam ion trap (EBIT) facility at the Lawrence Livermore National Laboratory is being used to absolutely calibrate the transmission efficiency of X-ray filters employed by diodes and spectrometers used to diagnose laser-produced plasmas. EBIT emits strong, discrete monoenergetic lines at appropriately chosen X-ray energies. X-rays are detected ...
In this paper we have demonstrated absolute wavelength tuning in an optical fiber multiwavelength filter based on a polarization-diversity loop structure by controlling electrical currents injected into enameled wires wound on polarization-maintaining fibers (PMFs), that is, adjusting Joule heat generated from current-flowing enameled wires. The proposed ...
Filtered x-ray diode detectors were used to measure absolute x-ray spectra below 1.5 keV at the Lawrence Livermore Laboratory Argus and Shiva laser facilities. We use K or L-edge filters in five and ten channel arrays to obtain energy resolution between 2...
The effectiveness of a commercial absolute air filter for removal of viruses from air was tested with an actinophage, under the usual conditions of a laminar airflow clean room. A new method of dry phage dispersion is described. The filter showed an average reduction of 99.996% of airborne actinophage. PMID:5684200
The effectiveness of a commercial absolute air filter for removal of viruses from air was tested with an actinophage, under the usual conditions of a laminar airflow clean room. A new method of dry phage dispersion is described. The filter showed an average reduction of 99.996% of airborne actinophage.
A glovebox ventilation system was designed for a new plutonium-238 processing facility that provided 1) downdraft ventilation, 2) a leak tight seal around the High Efficiency Particulate Air (HEPA) filters, and 3) a method for changing the filters internally without risk of contaminating the laboratory.
DOE Information Bridge
Based on photometric data of the central parts of eight globular clusters and one open cluster presented by An and his collaborators, we select red horizontal branch (RHB) stars in the (g-r)0-g0 diagram and make a statistical study of the distributions of their colors and absolute magnitudes in the SDSS ugriz system. Meanwhile, absolute magnitudes in the ...
A deep bed glass fiber fllter was designed, fabricated, and installed in the ten-inch vessel off-gas line as it leaves Bldg. 3019. The discharge from this filter goes to the 3039 stack. The efficiency of this filter at normal gas flow rates is equivalent (99.98%) to the absolute'' type ...
The primary objective of this research has been to develop algorithms for large scale computational problems arising in control, filtering, and system theory. Much work has concentrated on matrix Riccati equations which are absolutely fundamental, but a r...
The final preflight calibration tests of the CVF(Circular Variable Filter) II spectroradiometer were performed in the Aerospace Research Chamber (7V). These tests included linearity, absolute responsivity, angular response, frequency response, and wavelen...
Particulate removal from nuclear offgases can be broken down into three parts: pretreatment, prefiltration, and absolute filtration. Pretreatment, using conventional air cleaning devices in most cases, is sometimes required to temper the gases and remove heavy concentrations of particulate matter. Prefiltration, if required, serves primarily to protect the final ...
An absolute spectral irradiance scale for the 700-2400 nm range has been developed. The scale is based on an absolute radiometer and a series of interference filters, which were used to determine the spectral irradiance of quartz halogen incandescent lamps at a number of discrete wavelengths. Values at intermediate wavelengths have ...
An absolute displacement-sensing system based on channeled spectrum processing capable of simultaneous interrogation of fiber Bragg gratings and fiber-optic interferometric sensors is presented in which the role of the optical spectrometer is performed by a scanning Fabry-Perot filter. We demonstrate a resolution of +/-50 nm with an estimated dynamic range ...
Reviewed here are the design and characterization procedures used in our program for developing absolute x-ray spectrometry in the 100 to 10,000 eV region. Described are the selection and experimental calibration of the x-ray filters, mirror momochromator...
In this paper, a new fuzzy filter for the removal of random impulse noise in color video is presented. By working with different successive filtering steps, a very good tradeoff between detail preservation and noise removal is obtained. One strong filtering step that should remove all noise at once would inevitably also remove a ...
A method for calibrating incandescent lamps for spectral irradiance by means of absolute radiometers is described in which a secondary radiometer is calibrated spectrally against absolute radiometers and then used in conjunction with a series of filters to calibrate the lamps. Considering both narrowband and wideband ...
The electron beam ion trap (EBIT) facility at the Lawrence Livermore National Laboratory is being used to absolutely calibrate the transmission efficiency of X-ray filters employed by diodes and spectrometers used to diagnose laser-produced plasmas. EBIT emits strong, discrete mono-energetic lines at appropriately chosen X-ray energies. X rays are detected ...
-Estudio de las isoenzimas en liquenes bipolares. -Estudio microclimatico en comunidades liquenicas. -Continuacion del estudio del desarrollo primario en la ...
Estudio de productividad fitoplanctonica. - Estudio de la actividad metabolica del microplancton. - Estudio de la composicion y aspectos faunmsticos del ...
We have developed a low-cost, robust, multifoil-filtered spectrometer to provide absolute measurements of low-z impurity concentrations in the Madison Symmetric Torus reversed-field pinch. The spectrometer utilizes an array of six thin-film coated soft x-ray diodes. Each multilayered coating is specifically tailored to isolate the K-shell emission lines of ...
of a filtered vector space inherits a na* *tural filtration: if S V , then we define Si = S \\ V i, and if V an "object" = 1 + 2; is not a filtration of V , but we can still define deg V = deg1 V + deg2 V and V semistability o* *f slope 0. Faltings defined a Harder-Narasimhan filtration on filtered isocrystals so t
This paper present the results of an extensive study of the effect of a filter upon the performance of a resistive SQUID noise thermometer used to define an absolute temperature scale below 1 K. Agreement between the model for this effect and the experimental results indicated that the temperature scale defined by the noise thermometer is accurate to 0.1%.
We review the filtered x-ray diode technique used to measure absolute soft x-ray spectra at the LLNL laser irradiation facilities. We describe the new, improved ten channel system, designated the H, that has been installed on the Shiva target chamber and ...
Different measuring system were use to examine the performance of the coil B604. The first set up contains a Krohn-Hite model 3202 filter and a LeCroy 9410 digital scoop (with fast Fourier transform and calculation package) to determine the absolute values of the signals and the background signals. The filter was replaced by the ...
Glass wool, nonabsorbent cotton, fiberglass filter medium, and a commercial absolute filter were tested for effectiveness in removing aerosolized bacterial viruses under low flow rate (1 ft3/min) and high flow rate (10 to 25 ft3/min) air-flow conditions. Special equipment was designed for ...
The temporal stability of the National Institute of Standards and Technology (NIST) spectral irradiance scale as measured with broadband filter radiometers calibrated for absolute spectral irradiance responsivity is described. The working standard free-electron laser (FEL) lamps and the check standard FEL lamps have been monitored with radiometers in the ...
A high-precision absolute electrical substitution radiometer with a thermally stabilized cavity as a receiving element was designed at VNIIOFI and used to derive the Russian Special Standard of the solar irradiance. This nonselective radiometer is used in the measuring range from 50 to 2000 W/m2 with uncertainty of 0.1% and from 1 to 50 W/m2 with uncertainty not more than ...
