Search results for "error analysi"

Accuracy assessment and position correction for low-cost non-differential GPS as applied on an industrial peat bog

1999

A low-cost, non-differentially corrected hand-held GPS receiver was tested on an industrial peat production bog. A correction procedure (‘pseudo-differential correction’) was derived that corrected data points to the nearest position on a line defining the centre of each 15-m wide field. The result was a corrected log of track points for each field for all points lying along the field. It was found that the mean orthogonal distance from a field centreline was linearly correlated with mean uncorrected GPS data error (r 2 0.99) such that as GPS error increased so the accuracy obtained by correction decreased. For a signal with a mean uncorrected error of 30 m it was possible to reduce the err…

Gramatikas kļūdu analīze 12. klases angļu valodas eksāmena rakstiskajā daļā

2016

Angļu valodas centralizētais eksāmens 12. klasei sastāv no atsevišķām sadaļām katras valodas prasmes pārbaudei, bet rakstīšanas daļa sevī ietver vairāku prasmju pārbaudi. Rakstīšana un gramatika ir cieši saistītas. Šī pētījuma mērķis ir reģistrēt un klasificēt 12. klases skolēnu pieļautās gramatiskās kļūdas 2014. un 2015. gada centralizēto angļu valodas eksāmenu esejās. Diskursa analīze ir galvenā šī darba pētījuma metode. Pētījuma ietvaros tika analizētas simts esejas un noteiktas tajās esošās biežākās gramatiskās kļūdas un to cēloņi. Pētījuma rezultāti rāda, ka visbiežāk pieļautās gramatiskās kļūdas ir nepareizs artikulu lietojums, lietvārda un darbības vārda saskaņošana un nepareiza vārd…

Dual-Diameter Laterals in Center-Pivot Irrigation System

2022

Design strategies to enhance modern irrigation practices, reduce energy consumption, and improve water use efficiency and crop yields are fundamental for sustainability. Concerning Center-Pivot Irrigation Systems, different design procedures aimed at optimizing water use efficiency have been proposed. Recently, following a gradually decreasing sprinkler spacing along the pivot lateral with constant diameter and sprinkler flow rate, a new design method providing a uniform water application rate has been introduced. However, no suggestions were given to design multiple-diameter laterals characterized by different values of the inside pipe diameter. In this paper, first the previous design pro…

Estimation of significant solvent concentration ranges and its application to the enhancement of the accuracy of gradient predictions.

2004

Abstract The solvent concentration range actually useful for gradient predictions is significantly narrower than the total range scanned in a gradient run. This range, called “solvent informative range” (SIR), if known with the highest accuracy, allows to predict gradient retention times ( t g ) with minimal error. The small size of the SIR supports the application of the linear solvent strength theory (LSST). Furthermore, LSST allows a closed-form solution to the integral required to predict gradient retention times, which eliminates numerical integration, needed with other retention models. A methodology that calculates the SIR by applying error analysis, and uses it to improve the accura…

Guaranteed lower bounds for cost functionals of time-periodic parabolic optimization problems

2019

In this paper, a new technique is shown for deriving computable, guaranteed lower bounds of functional type (minorants) for two different cost functionals subject to a parabolic time-periodic boundary value problem. Together with previous results on upper bounds (majorants) for one of the cost functionals, both minorants and majorants lead to two-sided estimates of functional type for the optimal control problem. Both upper and lower bounds are derived for the second new cost functional subject to the same parabolic PDE-constraints, but where the target is a desired gradient. The time-periodic optimal control problems are discretized by the multiharmonic finite element method leading to lar…

Efficacy of screen recording in the other-revision of translations: episodic memory and event models

2014

In a 2011 study, Angelone compared the self-revision results of graduate German translation students. Participants documented their original translations using Integrated Problem and Decision Reporting (IPDR) logs (Gile 2004), think-aloud protocols and screen recordings. They then used this documentation to assist self-revision of their translations. Angelone found a significant improvement in error detection overall and in each of six discrete error categories when participants used screen recordings to assist their self-revision. We sought to partially replicate Angelone’s findings concerning the efficacy of screen recording in translation revision. Instead of focusing on self-revision, w…

Suggestions for revised scoring of the Tower of Hanoi test

2000

Detailed time and error analyses of the Tower of Hanoi (TOH) test was performed using four repeated assessments of eight children (ages 9-12 years), who had perceptual and problem solving deficits. The time before each move was measured. In addition to the traditionally counted time scores, new, relative time scores were computed in order to separate the planning time from the general reaction speed. New error scores were defined and sum scores of serious errors (perserative moves, illegal moves, and wrong results) and mild errors (self-corrected moves, almost performed moves, and interrupted trials) were computed. The relative planning time correlated positively with the achieved score, a…

On the property of diffusion in the spatial error model.

2005

International audience; The aim of this paper is to illustrate the property of global spillover effects in the first-order spatial autoregressive error model and the associated diffusion process of spatial shocks. An application is provided on a sample of 145 regions over 1989–1999 and highlights the most influential regions.

Language for International communication: Linking Interdisciplinary Perspectives on Cultural, Professional and Scientific Capacity Building: Book of …

2019

Analytical solution of kinematic wave time of concentration for overland flow under green-ampt infiltration

2015

In this paper the well-known kinematic wave equation for computing the time of concentration for impervious surfaces has been extended to the case of pervious hillslopes, accounting for infiltration. An analytical solution for the time of concentration for overland flow on a rectangular plane surface is derived using the kinematic wave equation under the Green-Ampt infiltration. The relative time of concentration is defined as the ratio between the time of concentration of an infiltrating plane and the soil sorptivity time scale, depending on the normalized rainfall intensity and a parameter synthesizing the soil and hillslope characteristics. It is shown that for a more complex case (corre…