Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: January 2014
Authors: Wei Wang, Ping Hao Ni
The system consists of distributed data acquisition devices, a communication system based on field bus, and a host based on B/S structure.
During the long-term period of operation, the insulation strength of a circuit breaker will reduce, its electrical life will shorten, and its mechanical condition will be damaged, even it will break down, due to the influence of mechanics, hot and damp weather, high voltage, chemistry, and other environmental factors.
System Structure The data acquisition unit of the circuit breaker is based on a microprocessor, and it mainly acquires and transmits the monitoring data from the circuit breaker.
The host of the monitoring system is based on the B/S structure, namely Browser/Server structure, and the host is generally installed in the central control room of the plant where the monitored circuit breakers locate.
Therefore, its feature values will greatly change when loose, abrasion, rupture, and other abnormal events occur in the mechanical structure of the circuit breakers.
During the long-term period of operation, the insulation strength of a circuit breaker will reduce, its electrical life will shorten, and its mechanical condition will be damaged, even it will break down, due to the influence of mechanics, hot and damp weather, high voltage, chemistry, and other environmental factors.
System Structure The data acquisition unit of the circuit breaker is based on a microprocessor, and it mainly acquires and transmits the monitoring data from the circuit breaker.
The host of the monitoring system is based on the B/S structure, namely Browser/Server structure, and the host is generally installed in the central control room of the plant where the monitored circuit breakers locate.
Therefore, its feature values will greatly change when loose, abrasion, rupture, and other abnormal events occur in the mechanical structure of the circuit breakers.
Online since: July 2011
Authors: Ke Yu Chen, Meng Xi Sun, Liang Chao Li, Qiu Shi Xiao, Feng Xu
The structure, composition and morphology and electromagnetic property of the obtained samples were characterized by means of modern testing techniques.
Introduction M.X.Wan et al.[1] had reported the structure and electrical property of poly(o-toluidine) (POT) as early as in 1995.
The structure and morphology of obtained samples were characterized by means of TG-DTA, XRD, FT-IR, UV-Vis, TEM and SEM.
It was learned from Fig.1(a) that the main diffraction peaks of BFA samples in the range of 20~65° presented the characteristic of hexagonal structure, and the indices of crystal planes of each peak were consistent with standard card (JCPDS CARD 78-0133) of hexagonal structure.[9] The XRD patterns of POT doped with hydrochloric acid shown in Fig.1(c) presented two broad diffraction peaks at 13.9 ° and 24.8 ° and a weaker one at 19.1 °, which were in well agreement with the result reported by Karim et.al [10] .
Hence, POT/BFA composites showed an obvious core-shell structure, in which BFA particles were core and POT were shell.
Introduction M.X.Wan et al.[1] had reported the structure and electrical property of poly(o-toluidine) (POT) as early as in 1995.
The structure and morphology of obtained samples were characterized by means of TG-DTA, XRD, FT-IR, UV-Vis, TEM and SEM.
It was learned from Fig.1(a) that the main diffraction peaks of BFA samples in the range of 20~65° presented the characteristic of hexagonal structure, and the indices of crystal planes of each peak were consistent with standard card (JCPDS CARD 78-0133) of hexagonal structure.[9] The XRD patterns of POT doped with hydrochloric acid shown in Fig.1(c) presented two broad diffraction peaks at 13.9 ° and 24.8 ° and a weaker one at 19.1 °, which were in well agreement with the result reported by Karim et.al [10] .
Hence, POT/BFA composites showed an obvious core-shell structure, in which BFA particles were core and POT were shell.
Online since: January 2013
Authors: Jie Ying Huang, Xiao Chun Xu, Yuan Xiang Zhou, Li Wei Chen
The experimental results also indicated that PAM had a significantly adhesive effect on soil particles than EDTA,improved the soil structure to a certain role,each matrix pH value varies between 7-8, and there are no significant difference between PAM and EDTA processing matrix.
The structure of the matrix was observed by the microscope.
In this study, we use 16x4microscope observed soil structure under dry and wet two kinds of condition.
Adding appropriate red soil combined with PAM, can ameliorate the soil structure to a certain degree.
Environmental chemistry. 26(5)(2007)606-611 [17]Y.H.
The structure of the matrix was observed by the microscope.
In this study, we use 16x4microscope observed soil structure under dry and wet two kinds of condition.
Adding appropriate red soil combined with PAM, can ameliorate the soil structure to a certain degree.
Environmental chemistry. 26(5)(2007)606-611 [17]Y.H.
Online since: December 2022
Authors: Shao Min Zhu, Yu Bin Yang, Hong Feng Xu, Shuo Jia Zhang
Fe2O3-C-Ni heterojunction structured composite on foam Ni was successfully prepared by simple and effective hydrothermal reaction.
The structure, ionic composition and the number of active sites were key factors determining the properties of electrode materials for electrochemical capacitors [1, 3].
The mesh structure is relatively uniform with the diameter of nanowires about 30-40 nm.
It is speculated that this structure is induced by growth of carbon microspheres.
Glycerol-assisted tuning of the phase and morphology of iron oxide nanostructures for supercapacitor electrode materials, Materials Chemistry Frontiers, 5(6), PP: 2758-2770, 2021. https://doi.org/10.1039/d0qm00900h [4] Cheng L, Zhang Q, Xu M, Zhai Q and Zhang C.
The structure, ionic composition and the number of active sites were key factors determining the properties of electrode materials for electrochemical capacitors [1, 3].
The mesh structure is relatively uniform with the diameter of nanowires about 30-40 nm.
It is speculated that this structure is induced by growth of carbon microspheres.
Glycerol-assisted tuning of the phase and morphology of iron oxide nanostructures for supercapacitor electrode materials, Materials Chemistry Frontiers, 5(6), PP: 2758-2770, 2021. https://doi.org/10.1039/d0qm00900h [4] Cheng L, Zhang Q, Xu M, Zhai Q and Zhang C.
Online since: June 2009
Authors: Bernard Legrand, Christophe Boyaval, Djamila Hourlier, Pierre Perrot
Here we describe a simple and effective approach to make silicon-based-nanowires
structured materials which can be utilized in a range of high technology electronic devices.
By convention, the standard state is solid Au (cfc structure), solid Si (diamond structure) and gases under 0.1 MPa pressure.
The HCl may further complicate the chemistry of the process if one considers the following reactions: + 4HCl SiCl4 + 2H2
SiH4(g) + 4HCl(g) SiCl4(g) + 4H2
+ 3HCl(g) SiHC13(g) + H2(g)
All these reactions are thermodynamically quite favourable and relatively large values of
SiClx species are expected.
It is important to emphasize several features of nanowires synthesized by this simple approach: first nanowires grow along the [111] direction perpendicular to the microfabricated structures (Fig. 5d).
Ruda: Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 15 (1997), 554
By convention, the standard state is solid Au (cfc structure), solid Si (diamond structure) and gases under 0.1 MPa pressure.
The HCl may further complicate the chemistry of the process if one considers the following reactions:
It is important to emphasize several features of nanowires synthesized by this simple approach: first nanowires grow along the [111] direction perpendicular to the microfabricated structures (Fig. 5d).
Ruda: Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 15 (1997), 554
Online since: February 2016
Authors: Pyotr P. Shchetinin, Margarita Shurupova
It is supposed that it was mainly due to the high-porous structure of the material.
This is probably due to the histological structure and high porosity of the material, which has an effect on the grass meal’s AA.
This can be due to an optimal ratio betwen the specific contacting area and undistorted cell structures with micropores of the studied material.
It is supposed that it was mainly due to the high-porous structure of the material.
Chemistry [Zhurnal sibirskogo federal'nogo universiteta.
This is probably due to the histological structure and high porosity of the material, which has an effect on the grass meal’s AA.
This can be due to an optimal ratio betwen the specific contacting area and undistorted cell structures with micropores of the studied material.
It is supposed that it was mainly due to the high-porous structure of the material.
Chemistry [Zhurnal sibirskogo federal'nogo universiteta.
Online since: January 2022
Authors: Ye Xuan Cheng
These microporous structures often have large potential voids, leading to a high surface area.
Structures of UTSA-280 are shown in Fig. 1.
Structure of activated UTSA-280 (i.e. water molecules are removed), showing empty one dimensional channel.
Structure of UTSA-280 binding with ethylene, showing one dimensional channel occupied by ethylene molecules.
MOFs have their advantaged structures that can offer both selectivity and rigidity.
Structures of UTSA-280 are shown in Fig. 1.
Structure of activated UTSA-280 (i.e. water molecules are removed), showing empty one dimensional channel.
Structure of UTSA-280 binding with ethylene, showing one dimensional channel occupied by ethylene molecules.
MOFs have their advantaged structures that can offer both selectivity and rigidity.
Online since: March 2012
Authors: Yi Guo Su, Xiao Qing Liu, Xiao Jing Wang, Li Lv, Yu Zhe Xie
Controllable synthesis of CaMoO4 microcrystals with tailored morphologies and optical properties
Li Lv1, 2, a, Yuzhe Xie1, b, Xiaoqing Liu,1, c Yiguo Su,1, d and Xiaojing Wang1*, e
1College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.
Moreover, it is seen that CaMoO4 can be well crystallized with tetragonal structure at room temperature.
The SEM images shown in figure 3 clearly reveal the crystallite structures of as-prepared CaMoO4.
The scheelite crystal structure of CaMoO4 is characterized by the tetragonal space group I41/a or C4h6.
For Td-symmetry, the scheelite structure has four vibrations, specified as ν1 (A1), ν2 (E), ν3 (F2) and ν4 (F2).
Moreover, it is seen that CaMoO4 can be well crystallized with tetragonal structure at room temperature.
The SEM images shown in figure 3 clearly reveal the crystallite structures of as-prepared CaMoO4.
The scheelite crystal structure of CaMoO4 is characterized by the tetragonal space group I41/a or C4h6.
For Td-symmetry, the scheelite structure has four vibrations, specified as ν1 (A1), ν2 (E), ν3 (F2) and ν4 (F2).
Online since: September 2012
Authors: Pin Jiang Li, Li Juan Sun, Xin Bing Zhu, Yan Ge Zhang, Zhen Hua Zhang, Li Bo Fan, Peng Wang
China
3 Institute of Chemistry and Chemical Engineering, Xuchang University, Xuchang 461000, China.
4 School of Physical Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, 450001, China.
1College of Electrical and Information Engineering, Xuchang University, Xuchang 461000, China.
2Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang 461000, China.
A film solar cellCubic-like lead sulfide (PbS) films wereas in situ fabricated on lead (Pb) foil on a large scalemade by with a structure of Glass/ITO/CdS/PbS/Al.
A photovoltaic device was made with a structure of Glass/ITO/CdS/PbS/Al.
Results and discussion The XRD technique was used to characterize the phase structure and crystallinity of the as-prepared products.
Fig.ure 5 3 b shows the schematic device structure of the heterojunctionhybrid solar cells of Al/P3HT:PbS/PEDOT:PSS/ITO/GlassGlass/ITO/CdS/PbS/Al.
A film solar cellCubic-like lead sulfide (PbS) films wereas in situ fabricated on lead (Pb) foil on a large scalemade by with a structure of Glass/ITO/CdS/PbS/Al.
A photovoltaic device was made with a structure of Glass/ITO/CdS/PbS/Al.
Results and discussion The XRD technique was used to characterize the phase structure and crystallinity of the as-prepared products.
Fig.ure 5 3 b shows the schematic device structure of the heterojunctionhybrid solar cells of Al/P3HT:PbS/PEDOT:PSS/ITO/GlassGlass/ITO/CdS/PbS/Al.
Online since: November 2021
Authors: Aivars Vembris, Valdis Kokars, Elmārs Zariņš, Karlis Balodis, Deins Alksnis, Patricija Paulsone
Based on the research conducted previously [12-13] it is expected that piperidine group and bulky triphenylgroup in compound Wq-2N and Wq-2XTr chemical structures would promote the solution processing ability of synthesized Alq3 complexes.
Various functional groups could be further incorporated in the chemical structure of the Wq-2NOH ligand of related Alq3 complex through hydroxyethyl-piperaznenyl linkers.
Cleavage of Boc protective group for continued ligand chemical structure modification could be done for this compound or for the corresponding Alq3 complex.
To the best of our knowledge, weak luminescence of quinolin-8-ol derivatives in solutions with similar chemical structures has been reported only in literature [10].
Conclusions Reliable methods of organic synthesis of 5-substituted derivatives of quinolin-8-ol were developed by experimental improvements of already known procedures and the chemical structures of the desired target products were confirmed by the NMR.
Various functional groups could be further incorporated in the chemical structure of the Wq-2NOH ligand of related Alq3 complex through hydroxyethyl-piperaznenyl linkers.
Cleavage of Boc protective group for continued ligand chemical structure modification could be done for this compound or for the corresponding Alq3 complex.
To the best of our knowledge, weak luminescence of quinolin-8-ol derivatives in solutions with similar chemical structures has been reported only in literature [10].
Conclusions Reliable methods of organic synthesis of 5-substituted derivatives of quinolin-8-ol were developed by experimental improvements of already known procedures and the chemical structures of the desired target products were confirmed by the NMR.