Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 105 for “"sampling frequency"”.
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Spatial Ecology of the Desert Tortoise: Sampling Frequency and Biological Influences
… methodological variables, such as sample size, sampling frequency, and the choice of estimator. Further confounding these estimates are a number of physical, social, and ecological factors. Identifying the main determinants of space use patterns by a species may aid conservation efforts.</p> …
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An Investigation on In-Process SPC Sampling Frequency for Shaft Bearing Turning Process
1 PDF file (56 pages)
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Post-Processing Method for Determining Peaks in Noisy Strain Gauge Data with a Low Sampling Frequency
… rear brake levers of motorcycles to record the frequency and magnitude of brake presses. The recorded data was sampled at 10 hertz and had a significant amount of noise introduced from temperature and electromagnetic interference. This thesis proposes a peak detection algorithm, written in …
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Automated symbolic model identification for nonlinear dynamical systems from time-series data with limited sampling frequency and precision
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Identifying Sources of Fecal Pollution in Water as Function of Sampling Frequency Under Low and High Stream Flow Conditions
… fecal pollution were evaluated as a function of sampling frequency with stream samples from Mill Creek, Montgomery County, VA. Samples were collected monthly for one year, plus weekly for four consecutive weeks during seasonal high flows (March), and seasonal low flows (September-October), plus …
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Integrated Aeration for Enhanced Nitrogen Conversion and Removal and the Effect of Sampling Frequency on Productivity Estimates in Algae-Based Wastewater Treatment Systems
… quality also raises the question of the optimal frequency and timing of grab sample collection, to obtain representative water quality data. Three sets of triplicate pilot raceways (1,000-L, 0.30-m deep, fed primary clarifier effluent) were operated at an inland central California wastewater …
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APPLICATION OF CONDITIONAL SIMULATION MODEL TO RUN-OF-MINE COAL SAMPLING FREQUENCY DETERMINATION AND COAL QUALITY CONTROL AT THE POWER PLANT (BLENDING, GOAL PROGRAMMING, MICROCOMPUTER).
Run-of-mine (ROM) coal sampling is one of the most important factors in determining the disposition of ROM coal for an overall emission control strategy. Determination of the amount of sample, or still better, the frequency of ROM coal sampling is thus essential to the analysis of overall emission …
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Pulse Time-Code Modulation System
… (PCM), the signal is sampled at a constant frequency, and pulse groups representing the signal amplitude are transmitted. The sampling frequency has to be related to the highest frequency in the signal; consequently, the sampling frequency is higher than is necessary during those times when …
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1-Gs/s, 14-Bit Digital -to -Analog Converter and Track -and -Hold Amplifier
… Simulation results are 83-dB SFDR at 100-MHz sampling frequency, 65-dB SFDR at 1-GHz sampling frequency, and 60-dB SFDR at 2-GHz sampling frequency under all Nyquist conditions.
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Comparative analysis of nitrate load estimation techniques in watersheds with different land-use characteristics
… The challenge is to determine the optimal data sampling frequency and the best method for the estimation of nutrient concentrations that minimizes the uncertainty caused by data and modeling errors in the estimated data. For that purpose, researchers have used various regression models such as …
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A continuous-time multi-stage noise-shaping delta-sigma modulator for next generation wireless applications
… (DT) SMASH architecture due to the inherent sampling frequency limitation of the DT implementation. Furthermore, the proposed CT SMASH architecture provides a better quantization noise suppression capability than the DT SMASH architecture by more completely canceling the quantization noise …
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Quantification of Nitrate Sources and Sinks Using a Water Quality Network in Morro Bay Estuary, California
… Estuary, California from 2007 to 2010 (15 min sampling frequency), this study addressed the two objectives of constructing a nitrate budget and assessing the influence of sampling frequency on water quality parameters. These two objectives led to the submission of an original report of research …
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Assessment and enhancement of lower extremity power of athletes
… DURING COUNTERMOVEMENT JUMP AND INFLUENCE OF SAMPLING FREQUENCY. STUDY 2: COMPARISON OF FOUR DIFFERENT METHODS TO MEASURE POWER OUTPUT DURING THE HANG POWER CLEAN AND THE WEIGHTED JUMP SQUAT. STUDY 3: DOES PERFORMANCE OF HANG POWER CLEAN DIFFERENTIATE PERFORMANCE OF JUMPING, SPRINTING, AND …
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A fourth order [Sigma] [Delta] bandpass modulator
… signal at eight times the carrier frequency and achieves an SNR of 82dB with a sampling frequency of 640kHz and a bandwidtn o 1.oKnz. ms document snows that bandpass [Sigma] [Delta] modulation offers the advantage of a high oversampling rate without the need to demodulate the signal …
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Development of error correction techniques for nitrate-N load estimation models
… loads. This study used a Monte Carlo sub-sampling method and error-corrected statistical models to estimate annual nitrate-N loads from two watersheds in central Illinois. The performance of three load estimation methods (the seven-parameter log-linear model, the ratio estimator, and the …
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Multicomponent distillation dynamics
… was increased for a five-minute period. The sampling frequency for the steady state and transient tests was one sample per minute from the.liquid of each of the plates and the feed, bottoms, and reflux streams. The sampling frequency for the pulse test was one sample every thirty seconds from …
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A zero-crossing based pipelined analog-to-digital converter with supply voltage scalibility
… Supply voltage scaling based on the required sampling frequency and resolution provides high energy efficiency over a wide range of sampling frequencies and resolutions. A two phase charge transfer scheme (course charge transfer and fine charge transfer) is used to achieve high speed and high …
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Low-Power and High Precision Sensing Circuit for a Three-Channel Electrochemical Sensor
… readout to be replaced with a low-power radio frequency transmitter for continuous monitoring. The proposed circuit is highly precise with an average current draw of 21 micro amps for a sampling frequency of once per minute. The target application is livestock health monitoring, which would be …
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The New Concept of GRACE Gradiometry and the Unravelling of the Mystery of Stripes
… to conclude that the GRACE spatial sampling pattern is responsible for the stripe artifacts. GRACE sampling characteristics are quantified and used to prove that the stripes are sub-Nyquist (pseudo-moir) artifacts. We show that the stripes are the result of oversampling the low …
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Optimizing a long-term monitoring program to track toxic cyanobacteria blooms in a Great Lakes estuary
… structure? (2) What temporal resolution and sampling window should a future monitoring program use, and can lagged effects of environmental conditions be used to predict cHABs? (3) What locations should be monitored to capture spatial heterogeneity in environmental conditions and …
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