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Loss Analytic Calculation and Error Analysis for HVDC Converter

open access: yesZhongguo dianli, 2022
The loss of modular multilevel converter (MMC) HVDC converter valve is not only an important performance and economic evaluation index of the system, but also the direct basis for the selection of converter valve power devices, junction temperature ...
Biaojun LI   +3 more
doaj   +1 more source

Research Progress on Vanillin in Alcoholic Beverages

open access: yesShipin gongye ke-ji, 2022
Vanillin is a very important aroma compound in alcoholic beverages. It has been widely concerned because of its pleasant sweet aroma, vanilla aroma and physiological function.
Xinliang MO   +4 more
doaj   +1 more source

On the character sums analogous to high dimensional Kloosterman sums

open access: yesAIMS Mathematics, 2022
The main purpose of this paper is using the properties of the classical Gauss sums and the analytic methods to study the computational problem of one kind of character sums analogous to high dimensional Kloosterman sums, and give some interesting ...
Jianghua Li , Xi Zhang
doaj   +1 more source

The generalized Kloosterman's sums and its fourth power mean

open access: yesAIMS Mathematics, 2023
The main purpose of this article is to study the calculating problem of one kind fourth power mean of the generalized Kloosterman's sums and provide an accurate calculating formula for it utilizing analytical methods and character sums' properties ...
Junfeng Cui , Li Wang
doaj   +1 more source

Optimizing tight oil extraction from low permeability tight reservoirs: a study on stress sensitivity effects and applications in carbon capture, utilization, and storage

open access: yesFrontiers in Energy Research, 2023
This paper takes into consideration the impact of stress sensitivity on bioenergy production from low permeability tight reservoirs, focusing on the post-fracturing phase.
Xin Jiang, Gaoming Yu
doaj   +1 more source

Describing the scattering of keV protons through graphene

open access: yesFrontiers in Chemistry, 2023
Implementing two-dimensional materials in technological solutions requires fast, economic, and non-destructive tools to ensure efficient characterization.
Jakob Bühler   +2 more
doaj   +1 more source

Green analytical methods [PDF]

open access: yesAnalytical and Bioanalytical Chemistry, 2012
In 1995 an analytical journal published the first small issue on green analytical chemistry entitled “Environmentally conscientious analytical chemistry”, which was devoted to environmental deleterious side effects of analytical methods, thus indicating that, in spite of the great advances in automation, miniaturization, and alternative sample ...
Miguel, de la Guardia, Sergio, Armenta
openaire   +2 more sources

A Simplified Mechanical Model and Analysis for the Settlement Deformation of Buried Pipelines Caused by Open-Cut Excavation

open access: yesApplied Sciences, 2023
This study aims to reveal the deformation characteristics of buried pipelines and the effects of various parameters on settlement displacement using the analytical analysis method.
Yulin Lu   +3 more
doaj   +1 more source

Research Review on Quality Detection of Fresh Tea Leaves Based on Spectral Technology

open access: yesFoods, 2023
As the raw material for tea making, the quality of tea leaves directly affects the quality of finished tea. The quality of fresh tea leaves is mainly assessed by manual judgment or physical and chemical testing of the content of internal components ...
Ting Tang   +5 more
doaj   +1 more source

Analytical modeling and calculation of core grounding current in converter transformer

open access: yesFrontiers in Energy Research, 2023
In recent years, the calculation of the core grounding current of the converter transformer is difficult, low precision, and time-consuming, especially when the core is grounded by multiple points.
Xiu Zhou   +6 more
doaj   +1 more source

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