Results 11 to 20 of about 4,797,913 (239)

Study of a set of factors influencing the error of surveying mine facilities using a geodesic quadcopter

open access: yesЗаписки Горного института, 2022
The factors influencing the qualitative and quantitative components of the result of surveying in open-pit mining using a quadcopter were identified and systematized, and the mathematical dependence of the influence of factors on the final error of ...
Vladimir N. Gusev   +2 more
doaj   +1 more source

Establishment and optimization of high-frequency regeneration system for Zoysia japonica Steed

open access: yes浙江大学学报. 农业与生命科学版, 2007
Regeneration system of Zoysia japonica Steud. in vitro was studied with leaves as explants. The results showed that optimal medium for callus induction was MS+1.5 mg·L-1 2, 4-dichlorophenoxyacetic acid (2,4-D)+0.5 tng·L-1 6-benzyladenine (6-BA)+26 g·L-1 ...
DU Min-hua, CHAI Chun-yue, TIAN Long
doaj   +1 more source

Study on the Influence and Optimization of the Venturi Effect on the Natural Ventilation of Buildings in the Xichang Area

open access: yesEnergies, 2021
Natural ventilation is a way to reduce the energy consumption of building operations and improve the indoor living environment comfort. The venturi cap is designed with a roof, grille and wind deflector to intensify the natural ventilation of buildings ...
Lili Zhang   +8 more
doaj   +1 more source

Variance Analysis of Randomized Consensus in Switching Directed Networks [PDF]

open access: yes, 2009
In this paper, we study the asymptotic properties of distributed consensus algorithms over switching directed random networks. More specifically, we focus on consensus algorithms over independent and identically distributed, directed Erdos-Renyi random ...
Jadbabaie, Ali   +2 more
core   +5 more sources

Mobility and transverse flow visualization using phase variance contrast with spectral domain optical coherence tomography [PDF]

open access: yes, 2007
Phase variance-based motion contrast is demonstrated using two phase analysis methods in a spectral domain optical coherence tomography system. Mobility contrast is demonstrated for an intensity matched Intralipid solution placed without flow within ...
Fingler, Jeff   +3 more
core   +1 more source

Noise variance estimation based on image segmentation

open access: yes工程科学学报, 2015
A new two-step noise variance estimation algorithm was proposed based on image segmentation. In the first step, a noisy image was smoothed and was segmented by the statistical region merge (SRM) algorithm, then the variance of each region was computed ...
WANG Zhi-ming
doaj   +1 more source

Jarzynski's equality, fluctuation theorems, and variance reduction: Mathematical analysis and numerical algorithms [PDF]

open access: yes, 2019
In this paper, we study Jarzynski's equality and fluctuation theorems for diffusion processes. While some of the results considered in the current work are known in the (mainly physics) literature, we review and generalize these nonequilibrium theorems ...
Hartmann, Carsten   +2 more
core   +2 more sources

The inquiry into the economic life of Croatian municipalities [PDF]

open access: yesZbornik radova Ekonomskog fakulteta u Rijeci : časopis za ekonomsku teoriju i praksu, 2014
The aim of this paper is to analyze the main determinants of the economic life in Croatian municipalities. For that purpose, we collected data related to the municipal budgets and business results of entrepreneurs registered in 427 municipalities ...
Ivana Rašić Bakarić   +2 more
doaj  

Modeling and optimization of face milling process parameters for AISI 4140 steel

open access: yesTehnički Glasnik, 2018
In this study, the effect of cutting parameters such as the depth of cut, feed rate, cutting speed and the number of inserts on surface roughness were investigated in the milling of the AISI 4140 steel.
Gokhan Basar   +3 more
doaj   +1 more source

Characteristics and main influence factors of heat waves in Beijing–Tianjin–Shijiazhuang cities of northern China in recent 50 years

open access: yesAtmospheric Science Letters, 2020
Heat wave is serious natural disaster that can harm human health and affect social economy, transportation and ecological environment. This paper investigates the long term trends of high temperature events in three major cities (Beijing, Tianjin and ...
Zuofang Zheng   +4 more
doaj   +1 more source

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