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Standards and Technical Documents - Data Transforms For Spectral Analyses Of Heart Rate Variablity - BIOMED 2008
Description: Autoregressive and fast Fourier transform spectral analyses of high-frequency heart rate variability (HF-HRV) result in exponentially-distributed values that make standard parametric statistical analyses problematic. In this paper, we evaluate three transforms of raw HF-HRV spectral power. TwoShow More
Supplier: ABB Measurement & Analytics
Description: An important activity in the optimization of the HF alkylation process is the analysis of re-circulating acid. This is normally achieved by taking off-line samples and conducting laboratory analyses on a periodic basis. There are, however, a number of problems associated with this approach
- Spectrometer Type: Fourier Transform (FTIR)
- Display Options: Video Display
Description: efficiency,OROS 3-Series analyzers innovate in both hardware and software architectures.NVGate®, the OROS Noise and Vibration software platform, controls all the analyses and measurements carried out by OR38 as part of OR3X analyzers range, OR38 benefits from the innovative functions developed
- Mounting Type: Portable/Benchtop
- Analyzer Type: Instrument, PC-Based
- Test Type: Noise
- Analysis Type: Fast Fourier Transform (FFT)
Supplier: Scantek, Inc.
Description: The SC260 is a user-friendly, class 2 integrating sound level meter. It can be used as either a sound level meter or as a real time spectrum analyser in one-third octave bands and octave bands, with class 2 filters. The SC260 measures all functions simultaneously, with all frequency weightings
- Meter Style: Sound Level Meter
- Sound Level Measurement Modes: A-Weighted SPL (LA), C-Weighted SPL (LC), Z-Weighted SPL (LZ)
- Time Response: Fast, Slow, Impulse
- Control Panel: Digital
Supplier: Allied Electronics, Inc.
Description: the Dual Waveform Math (DWM) and Fast Fourier Transform (FFT) functions (in the U1604A/U1604B model) to perform quick waveform analyses in both time and frequency domains. The built-in 6000 resolution count true RMS digital multimeter (DMM) comes with an auto-range feature that gives users the flexibility
- Bandwidth: 4.00E7 Hz
- Number of Input Channels: 2 (# channels)
- Features: Hand-held Unit, Integral Display
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LabVIEW Real-Time Module
) control and fast Fourier transforms (FFTs)-in your stand-alone systems. Real-time hardware drivers are also available with most NI I/O modules, so you can acquire data deterministically using the same API calls (for example, NI-DAQmx) as in LabVIEW for the desktop. (read more)
Browse Embedded Programming Software Datasheets for National Instruments
Buehler, an ITW Company
SimpliMet 4000™ automatic duplexing mounting press
Buehler Introduces SimpliMet 4000™ – Advanced Mounting System Designed for Speed, Durability & Ease of Use. Buehler is introducing the SimpliMet 4000, an automatic, duplexing mounting press designed specifically for use in industrial laboratories where fast reliable results are required. The Simpli (read more)
Browse Mounting Presses and Equipment Datasheets for Buehler, an ITW Company
Shock & Vibration Testing ISO:17025 Accredited
blows. Testing sequence will depend on the operating condition that is to be represented. Shock Testing Services Our shock testing engineers will condition, plot and help you analyze up to 128 channels of real time data - Shock Response Spectrum (SRS), Fast Fourier Transform (FFT) or modal analysis (read more)
Browse Shock and Vibration (Dynamics) Testing Services Datasheets for E-Labs, Inc.
Control System Automates Paleomagnetic Studies
up to 1000 Hz. The ADwin also helps to stabilize calibration data. Using ADwin as a controller for existing systems in this way makes these systems much more affordable. ADwin’s ability to quickly perform Fast Fourier Transforms (FFTs) is equally useful when recording and monitoring waveform (read more)
Browse Data Acquisition Systems and Instruments Datasheets for CAS DataLoggers
High resolution offers 16x more detail
is ideal for finding noise, crosstalk or distortion in signals. The spectrum analyzer in PicoScope is of the Fast Fourier Transform (FFT) type which, unlike a traditional swept spectrum analyzer, can display the spectrum of a single, non-repeating waveform. A full range of settings gives you control (read more)
Browse Oscilloscopes Datasheets for Pico Technology
Knight Optical (USA) LLC
Germanium windows for Thermal Imaging applications
is higher than the two of them, to form corrected doublets and lens systems. These systems include, for example, Forward Looking Infra-Red (FLIR) systems, and thermography See our stock range of Germanium Windows, available for fast worldwide delivery! Typical specs: Material: Germanium Diameter: Up (read more)
Browse Optical Windows Datasheets for Knight Optical (USA) LLC
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Effects of analysed signal duration and phase on the results of fast fourier transform analysis of the surface electrocardiogram in sub- jects with and without late potentials.
OSA | Pulsed quantum cascade laser-based CRDS substance detection: real-time detection of TNT
M. Mazurenka, R. Wada, A. J. L. Shillings, T. J. A. Butler, J. M. Beames, and A. J. Orr-Ewing, “ Fast fourier transform analysis in cavity ring-down spectroscopy: application to an optical detector for atmospheric NO2,” Appl. Phys. B81 …
OSA | A zero-crossing detection method applied to Doppler OCT
C.Â Di Mario, J. R. T. C.Â Roelandt, P.Â deJaegere, D. T.Â Linker, J.Â Oomen, and P. W.Â Serruys, "Limitations of the zero crossing detector in the analysis of intracoronary Doppler: A comparison with fast Fourier transform analysis of basal, hyperemic, and …
Location feasibility of degradation in cable through Fourier transform analysis of broadband impedance spectra
The difference in impedance between the damaged and sound cables is made clear by fast Fourier transform analyses , from which the damaged portion can be located.
Differences in collagen architecture between keloid, hypertrophic scar, normotrophic scar, and normal skin: An objective histopathological analysis
In 2002, Van Zuijlen et al.25 showed the possibility of performing accurate and reliable objective measurements of the collagen orientation in burn scars, using the fast fourier transform analysis .
Tuning the power spectrum of physiological finger tremor frequency with flickering light
Abstract Fast Fourier Transform analyses were performed on finger tremor movements at 0.2‐Hz intervals from 0.4 to 40 Hz in 10 human subjects, under a flickering light condition of 4–15 Hz and an unstimulated control condition.
Study of an efficient real-time monitoring and control system for BUE and cutter breakage for CNC machine tools
Fast Fourier Transform analysis will be applied to on-line analyze the .
Algorithm for sleep scoring in experimental animals based on fast Fourier transform power spectrum analysis of the electroencephalogram
Abstract We developed a simple computer‐based, sleep scoring algorithm that categorizes three vigilance states of rats and mice as wakefulness, rapid eye movement (REM) sleep and non‐rapid eye movement (NREM) sleep, based on fast Fourier transform analyses of an electroencephalogram (EEG) classified …
Analysis of polycyclic aromatic hydrocarbon sequences in a premixed laminar flame by on‐line time‐of‐flight mass spectrometry
Fast Fourier transform analysis .
Color Doppler‐enhanced Endoscopic Ultrasonographic Diagnosis of Upper Gastrointestinal Submucosal Lesions
For leiomyomatous tumors less than 5 cm including leiomysarcoma, the presence of turbulent, pulsatile flow, as demonstrated on fast Fourier transform analysis , was associated with a sensitivity of 100% (7/7) and a specificity of 77.8% (7/9).