Results 31 to 40 of about 379,419 (302)

Linear Active Disturbance Rejection Control System for the Travel Speed of an Electric Reel Sprinkling Irrigation Machine

open access: yesAgriculture
The uniformity of the travel speed of electric reel sprinkling irrigation machines is a key factor affecting irrigation quality. However, conventional PID control is susceptible to sudden disturbances under complex farmland conditions, leading to reduced
Lingdi Tang   +5 more
doaj   +1 more source

Produtividade do feijoeiro sob diferentes uniformidades de distribuição de água na superfície e na subsuperfície do solo Dry bean yield under different uniformity of water distribution on soil surface and undersurface

open access: yesEngenharia Agrícola, 2007
Com o objetivo de comparar a uniformidade de lâminas aplicadas, uniformidade de umidades no solo e produtividade da cultura do feijoeiro, conduziu-se um experimento utilizando a cultivar de feijão IAPAR 57.
José A. Frizzone   +3 more
doaj   +1 more source

Uniform Space [PDF]

open access: yesFormalized Mathematics, 2016
Abstract In this article, we formalize in Mizar [1] the notion of uniform space introduced by André Weil using the concepts of entourages [2]. We present some results between uniform space and pseudo metric space. We introduce the concepts of left-uniformity and right-uniformity of a topological group. Next,
openaire   +3 more sources

Water distribution in laterals and units of subsurface drip irrigation. II: Field evaluation. [PDF]

open access: yes, 2009
The performance of drip irrigation and subsurface drip irrigation (SDI) laterals has been compared. Two emitter models (one compensating and the other noncompensating) were assessed.
Rodríguez Sinobas, Leonor   +3 more
core   +1 more source

Design Method for Laser Target Simulator Illumination System With High Energy Utilization and High Uniformity

open access: yesIEEE Photonics Journal
In this paper, a novel design of the illumination optical system for a laser target simulator is investigated to determine the optimal relationship between the uniformity of the illumination system and the energy utilization in a laser target simulator ...
Huibo Shao   +4 more
doaj   +1 more source

Preparation of Phosphate Ore Reference Materials for Chemical Composition Analysis

open access: yesYankuang ceshi, 2017
For the development and comprehensive utilization of phosphate ore it is not only necessary to analyze the main elements such as phosphorus, but it is also necessary to determine accurately the rare earth, trace and other elements.
ZENG Mei-yun   +3 more
doaj   +1 more source

VALUE OF INCREASING KERNEL UNIFORMITY [PDF]

open access: yes, 2017
Kernel uniformity is an important quality attribute that can now be measured at low cost. This study analyzes the profitability of sorting to increase wheat kernel uniformity. Nonlinear programming is used to sort grain loads to maximize flour yield by
Yoon, Byung-Sam   +2 more
core   +1 more source

A New Method for Evaluating the Homogeneity and Structure of Remolded Loess Samples with the Air Permeability Coefficient

open access: yesApplied Sciences, 2022
The uniformity of remolded loess samples prepared in the laboratory directly determines the reliability of various test results. While many tests have been designed to reflect the properties of undisturbed loess, there are obvious structural differences ...
Zhitao Hao   +7 more
doaj   +1 more source

Optimizing Perforated Bellows Formation: Achieving Uniformity and Precision through Proportional Roll Mold Transfer and Length Reduction

open access: yesTehnički Glasnik
This study presents an experimental device designed for single-process formation of perforated bellows through proportional control transfer of the roll mold, ensuring uniformity in thickness and height.
Nam Do Baek   +4 more
doaj   +1 more source

Effect of metal slots on the heating uniformity of multisource cavity microwave

open access: yesFrontiers in Energy Research, 2023
Microwave heating as a new type of heating has been widely used in numerous fields; however, microwave heating in multi-source cavity still poses several problems, including non-uniformity, low efficiency, restriction of the heating object, and “thermal ...
Shumeng Yin, Shumeng Yin
doaj   +1 more source

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