scholarly journals A Fast Finite Sample Count Symmetric Component Extraction Method for Use in Grid Side Converters

2021 ◽  
Author(s):  
Ruzica Cvetanovic ◽  
Zarko Janda
Keyword(s):  
Extraction Method ◽  
New Method ◽  
Finite Sample ◽  
Symmetrical Components ◽  
Symmetric Component ◽  
Sample Count ◽  
Component Extraction ◽  
Grid Side ◽  
Fast Extraction

This paper proposes a new method for very fast extraction of symmetrical components.

scholarly journals A Fast Finite Sample Count Symmetric Component Extraction Method for Use in Grid Side Converters

2021 ◽  
Author(s):  
Ruzica Cvetanovic ◽  
Zarko Janda
Keyword(s):  
Extraction Method ◽  
New Method ◽  
Finite Sample ◽  
Symmetrical Components ◽  
Symmetric Component ◽  
Sample Count ◽  
Component Extraction ◽  
Grid Side ◽  
Fast Extraction

This paper proposes a new method for very fast extraction of symmetrical components.

scholarly journals Quaternary Alloy Quantum Dots as Fluorescence Probes for Total Acidity Detection of Paper-Based Relics

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1726
Author(s):  
Zhuorui Wang ◽  
Cong Cheng ◽  
Yongjuan Cheng ◽  
Lizhen Zheng ◽  
Daodao Hu
Keyword(s):  
Quantum Dots ◽  
Extraction Method ◽  
Quaternary Alloy ◽  
New Method ◽  
Fluorescence Probes ◽  
Total Acidity ◽  
Weak Acids ◽  
Paper Sample ◽  
Composition And Structure ◽  
Alloy Quantum Dots

Traditionally, the acidity of paper-based relics was determined by an extraction method and using a pH meter. This method could not obtain the total acidity of the paper-based relics because it only detected the concentration of free protons in the aqueous soaking solution. To overcome this defect, a new method for determining the total acidity of paper-based relics has been established by using quaternary alloy quantum dots. The quantum dots, CdZnSeS, modified by p-Aminothiophenol (pATP) were prepared, and their composition and structure were characterized. The fluorescence behavior of prepared quantum dots with acidity was investigated. The following results were obtained. The fluorescence of CdZnSeS-pATP quantum dots could decrease with increases in acidity because pATP dissociated from the surfaces of the quantum dots due to protons or undissociated weak acids. Based on this feature, a method for determining the acidity of paper-based relics was constructed, and this method was used to evaluate the acidity of actual paper-based relics. Obviously, for a given paper sample, since both free protons and bound protons can be determined by this method, the acidity measured by this method is more reasonable than that by pH meter.

scholarly journals Study of an Edible Vegetable Oil Component Extraction Method Suitable for Measurements by the Taste Sensing System

2015 ◽  
Vol 62 (9) ◽  
pp. 454-460 ◽  
Author(s):  
Ryuichi Itoyama ◽  
Katsuyuki Ishihara ◽  
Naoko Sugihara ◽  
Rui Sakuma ◽  
Koichi Hato ◽  
...  
Keyword(s):  
Vegetable Oil ◽  
Extraction Method ◽  
Sensing System ◽  
Component Extraction ◽  
Edible Vegetable Oil

Study on Liposoluble Constituents Fingerprinting of Panax Quinquefolius and Panax Ginseng

2014 ◽  
Vol 687-691 ◽  
pp. 4420-4425
Author(s):  
Yan Qiao ◽  
Chang Mo Li ◽  
Qian Li ◽  
Ting Tang ◽  
Xiao Zhen Xu ◽  
...  
Keyword(s):  
Panax Ginseng ◽  
Extraction Method ◽  
Full Range ◽  
Panax Quinquefolius ◽  
New Method

We adopted a new extraction method - Accelerated Solvent Extractor (ASE)[1] to extract the liposoluble constituents of Panax quinquefolius and Panax ginseng. GC-MS was used to analyze extract constituents with liposoluble, and which main peaks were identified. It was the fingerprints of liposoluble constituents of Panax quinquefolius and Panax ginseng [2]. This method was able to expose liposoluble constituents with a full range offering a new method for identification and controlling quality of Panax quinquefolius and Panax ginseng.

scholarly journals RESEARCH ON SHORT-CIRCUIT IMPEDANCES OF NEW CONVERTER TRANSFORMER

2020 ◽  
Vol 38 (02) ◽  
Author(s):  
TRAN THANH NGOC
Keyword(s):  
Theoretical Analysis ◽  
Topological Structure ◽  
Short Circuit ◽  
Experimental Results ◽  
New Method ◽  
Mathematical Relationship ◽  
Hvdc System ◽  
Grid Side ◽  
Relationship Of ◽  
Circuit Impedance

The short-circuit impedance of converter transformers is one of the most important specifications in HVDC system. Compared with the traditional converter transformers, the new converter transformer has unique windings connection diagrams. Based on the topological structure of the new converter transformer, this paper proposes a new method to establish the mathematical relationship of short-circuit impedances and filters impedances under considering the valve side and grid side shortcircuit conditions. The analysis on short circuit at valve side and grid side shows that short-circuit impedances values are almost the same in both two conditions, so that the impedance of the new converter transformer is symmetrical. Finally, simulation and experimental results verify the correctness of the theoretical analysis.

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