Study of algorithms determining valid signal maximum parameters in measurement problems

1991 ◽  
Vol 34 (12) ◽  
pp. 1234-1236
Author(s):  
A. G. Ramazanova
Keyword(s):  
Valid Signal ◽  
Maximum Parameters ◽  
Signal Maximum

Laboratory X-ray powder diffraction: a comparison of different geometries with special attention to the usage of the CuKα doublet

1999 ◽  
Vol 32 (4) ◽  
pp. 799-807 ◽  
Author(s):  
Martin Oetzel ◽  
Gernot Heger
Keyword(s):  
Powder Diffraction ◽  
Profile Analysis ◽  
Rietveld Method ◽  
Structure Refinement ◽  
Strong Dependence ◽  
Line Profile Analysis ◽  
X Ray ◽  
Diffraction Angle ◽  
Maximum Parameters ◽  
The Right

In a laboratory X-ray powder diffraction study, the evaluation of the patterns of three Bragg–Brentano powder diffractometers with different monochromator geometries has been undertaken. For the measurements on each diffractometer, the standard reference material SRM 640 (silicon) and the corundum samples SRM 674a and SRM 1976 have been used. In each case, the peak profiles were fitted with a split Pearson VII function and the FWHM (full width at half-maximum) parameters and exponentmwere determined for the left (lower 2θ) and the right (higher 2θ) sides of the Bragg peaks. It was found that there is a strong dependence of both the FWHM and the exponentmon the diffraction angle for the two configurations that included monochromators, whereas nearly constant values ofmwere found for the geometrically simplest diffractometer working without a monochromator. Finally, the two components of the CuKα doublet show systematically different peak profiles. There is a clear difference not only concerning the FWHM, which becomes more obvious at higher 2θ values, but also in the course ofmwith respect to the diffraction angle for the left and the right tails of the powder reflections. This is the main reason for the difficulties inKα2stripping and also in single-line-profile analysis when using theKα doublet. Therefore, it is not surprising that this phenomenon, which can be explained by Heisenberg's uncertainty principle, does affect the reliability (represented by standardRvalues) of structure refinement by the Rietveld method.

Monitoring exercise programmes and improving cardiovascular performance

2019 ◽  
pp. 389-400
Author(s):  
Stephan Mueller ◽  
Flavia Baldassarri ◽  
Julia Schönfeld ◽  
Martin Halle
Keyword(s):  
Exercise Training ◽  
Cardiopulmonary Exercise Testing ◽  
Relevant Information ◽  
Peak Oxygen Consumption ◽  
Performance Diagnosis ◽  
Maximal Load ◽  
Cardiovascular Performance ◽  
Exercise Programmes ◽  
Maximum Parameters ◽  
The Individual

Cardiovascular exercise performance is associated with lower morbidity and mortality. In addition to maximal load, heart rate, and peak oxygen consumption, cardiopulmonary exercise testing and lactate analyses can provide relevant information on cardiovascular performance, diagnosis, exercise prescription, and monitoring of exercise programmes based on submaximal parameters. Using submaximal thresholds has the advantage that the prescription and effect of exercise training are directly linked to the underlying energy metabolism and therefore can reveal the specific needs of the individual. There are several methods ofr strength testing that are all based on maximum parameters and should be chosen according to the best-fit principle to the underlying strength training programme. In addition, new media such as wearables, innovative gadgets and telemonitoring have become increasingly popular in recent years and can be used to monitor the exercise training sessions, providing information for evaluation and adjustment of training if necessary.

A new field test to estimate the aerobic and anaerobic thresholds and maximum parameters

2019 ◽  
Vol 20 (4) ◽  
pp. 437-443 ◽  
Author(s):  
Nicola Giovanelli ◽  
Stefano Scaini ◽  
Veronique Billat ◽  
Stefano Lazzer
Keyword(s):  
Field Test ◽  
Maximum Parameters ◽  
Aerobic And Anaerobic

Fixing the signal maximum in pulsed laser rangefinders

2006 ◽  
Vol 73 (8) ◽  
pp. 539
Author(s):  
G. A. Aver'yanov ◽  
A. V. Nuzhin
Keyword(s):  
Pulsed Laser ◽  
Signal Maximum

scholarly journals PETROGRAPHIC CHARACTERISTICS OF THE RESERVOIR ROCKS IN THE BAT-UPPER JURASSIC DEPOSITS OF THE SOUTH OF WESTERN-SIBERIAN PETROLEUM BASIN

2019 ◽  
Vol 2 (1) ◽  
pp. 25-31
Author(s):  
Lyudmila Vakulenko ◽  
Aleksey Popov ◽  
Sergey Rodyakin ◽  
Evgeniy Khabarov ◽  
Peter Yan
Keyword(s):  
Oil And Gas ◽  
Upper Jurassic ◽  
The South ◽  
Reservoir Properties ◽  
Petrographic Composition ◽  
Reservoir Rocks ◽  
Regional Sources ◽  
Porosity And Permeability ◽  
Maximum Parameters ◽  
Petroleum Basin

The features of the petrographic composition of the bath-upper Jurassic silt-sand rocks exposed by wells in the South of the West Siberian oil and gas basin are considered. The study is focused on the parameters that had a significant influence on the reservoir properties of rocks: granulometric and mineral-petrographic composition of the clastic part of rocks, cement content, structure and composition. Some conclusions are drawn on the spatial distribution of rocks of different composition within the subisochronous sedimentary complexes. It is assumed that significant variations in their composition are caused by a complex combination of varying degrees of interdependent factors: influence of local and regional sources of clastic material, peculiarities of redistribution of material during its transportation and sedimentation, and post-sedimentation changes. Most variable values of reservoir properties, with a recorded maximum parameters of porosity and permeability are obtained for the rocks of Medium-Upper Oxford complex on Verkhnetarskaya, Dedovskaya, Basinskaya, Veselovskaya, to a lesser extent, Kasmanskaya, Vostochnaya and Tai-Dasskaya drilling sites.

scholarly journals On the Probability of Erasure for MIMO-OFDM

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Kasturi Vasudevan ◽  
A. Phani Kumar Reddy ◽  
Gyanesh Kumar Pathak ◽  
Shivani Singh
Keyword(s):  
Fading Channels ◽  
Communication Systems ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Spatial Multiplexing ◽  
Main Requirement ◽  
Valid Signal ◽  
Input Multiple Output ◽  
Mimo Ofdm ◽  
Wireless Standards

Detecting the presence of a valid signal is an important task of a telecommunication receiver. When the receiver is unable to detect the presence of a valid signal, due to noise and fading, it is referred to as an erasure. This work deals with the probability of erasure computation for orthogonal frequency division multiplexed (OFDM) signals used by multiple input multiple output (MIMO) systems. The theoretical results are validated by computer simulations. OFDM is widely used in present day wireless communication systems due to its ability to mitigate intersymbol interference (ISI) caused by frequency selective fading channels. MIMO systems offer the advantage of spatial multiplexing, resulting in increased bit-rate, which is the main requirement of the recent wireless standards like 5G and beyond.

A rapid and accurate spectrofluorometric method for quantification and screening of urinary porphyrins.

1988 ◽  
Vol 34 (2) ◽  
pp. 345-351 ◽  
Author(s):  
J Westerlund ◽  
M Pudek ◽  
W E Schreiber
Keyword(s):  
Quantitative Method ◽  
Limit Of Detection ◽  
Sodium Thiosulfate ◽  
Fluorescence Method ◽  
Isosbestic Point ◽  
High Concentration ◽  
Preliminary Purification ◽  
Spectrofluorometric Method ◽  
Signal Maximum ◽  
Urinary Porphyrins

Abstract We describe a fluorescence method for screening and quantifying urinary porphyrins. New and effective approaches are used to oxidize prophyrinogens, correct the baseline, and ensure that uroporphyrin (uro) and coproporphyrin (copro) are equally detected, mole for mole. No preliminary purification is required. A 45-microL aliquot of urine is oxidized with 3 mmol/L iodine in 3 mol/L HCl to convert porphyrinogens to porphyrins, and then decolorized with 5 mL of 0.45 mmol/L sodium thiosulfate. An excitation scan is done from 350 nm to 440 nm, monitoring emission at 650 nm. Total porphyrin content is determined at the isosbestic point for uro and copro, and the mole fractions of uro and copro are estimated from the wavelength of the signal maximum. There is no interference from protein, glucose, bilirubin, or hemoglobin in high concentration. The limit of detection is less than 30 nmol/L and linearity is maintained up to 3200 nmol/L. Recoveries and precision are excellent. This is a rapid, sensitive screen for porphyrinuria as well as an accurate and precise quantitative method. We compared the method with existing methods and discuss some shortcomings common to many of them.

A design of a valid signal selecting and position decoding ASIC for PET using silicon photomultipliers

2017 ◽  
Vol 12 (01) ◽  
pp. C01089-C01089 ◽  
Author(s):  
M. Cho ◽  
K.-t. Lim ◽  
H. Kim ◽  
J.-y. Yeom ◽  
J. Kim ◽  
...  
Keyword(s):  
Silicon Photomultipliers ◽  
Valid Signal
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