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Online since: September 2013
Authors: Zheng Xin Yan, Ming Li, Dong Zhi Yan, Hua Ping Yang
For coal molecule models, researchers promoted averaged structure unit model, net structure model, synthesis structure model, chemical structure model and physical structure model etc, which of them, Fuchs structure model, Given structure model, Wiser structure model, Honda structure model, Shinn structure model and two phase model, were appreciated in different simulations.
The model was structured and optimized in GaussView.
Coal Structure and Its Reactivtity [M].Beijing:Science Press,2002.
(In Chinese) [6] Ji-shun Yu.Coal Chemistry [M].Beijing:Metallurgical Industry Press,2000:163(In Chinese) [7] Hua-ping Yang, Ming Li, Zheng-xin Yan.
FTIR study of the evolution of coal structure during the coalification process[J].Org Geochem,1996,24(6/7):725-735 [10]G.A.Carlson.Computer simulation of the molecular structure of bituminous coal [J].
The model was structured and optimized in GaussView.
Coal Structure and Its Reactivtity [M].Beijing:Science Press,2002.
(In Chinese) [6] Ji-shun Yu.Coal Chemistry [M].Beijing:Metallurgical Industry Press,2000:163(In Chinese) [7] Hua-ping Yang, Ming Li, Zheng-xin Yan.
FTIR study of the evolution of coal structure during the coalification process[J].Org Geochem,1996,24(6/7):725-735 [10]G.A.Carlson.Computer simulation of the molecular structure of bituminous coal [J].
Online since: January 2017
Authors: Tanapak Metanawin, Praripatsaya Panutumrong, Siripan Metanawin
The crystal structure of hybrid nano-zinc oxide was explored by X-ray diffraction spectroscopy.
The SEM image of the well-defined structure of the miniemulsion is shown in Fig. 2.
SEM micrographs showed the well-defined structure of hybrid nano-zinc oxide.
Durrant, Hybrid polymer/metal oxide solar cells based on ZnO columnar structures, J.
Durana, Photocatalytic efficiency of ZnO plates in degradation of azo dye solutions, Journal of Photochemistry and Photobiology A: Chemistry 198 (2008) 1–6
The SEM image of the well-defined structure of the miniemulsion is shown in Fig. 2.
SEM micrographs showed the well-defined structure of hybrid nano-zinc oxide.
Durrant, Hybrid polymer/metal oxide solar cells based on ZnO columnar structures, J.
Durana, Photocatalytic efficiency of ZnO plates in degradation of azo dye solutions, Journal of Photochemistry and Photobiology A: Chemistry 198 (2008) 1–6
Online since: October 2011
Authors: Shao Bin Huang, Shui Xia Chen, Hui Xing Huang
The reasons of the high electrocatalytic activity due to the high surface area resulted from the hollow nanosphere structure with porous shell.
The center portions of the nanospheres are brighter than their wall edge, illustrating a hollow structure.
The enhanced CH3OH oxidation activity was also observed on other PtRu particles and can be explained by bifunctional mechanism [6], the Pt electronic structure change and its especial hollow structure .
Conclusions In summary, a PtRu catalyst with a hollow nanosphere structure has been synthesized by employing cobalt metal nanoparticles as the sacrificial templates.
This PtRu hollow nanospheres catalyst showed a superior electrocatalytic activity towards the methanol oxidation reaction compared to the solid PtRu catalyst because of large surface area structure and ideal surface structure.
The center portions of the nanospheres are brighter than their wall edge, illustrating a hollow structure.
The enhanced CH3OH oxidation activity was also observed on other PtRu particles and can be explained by bifunctional mechanism [6], the Pt electronic structure change and its especial hollow structure .
Conclusions In summary, a PtRu catalyst with a hollow nanosphere structure has been synthesized by employing cobalt metal nanoparticles as the sacrificial templates.
This PtRu hollow nanospheres catalyst showed a superior electrocatalytic activity towards the methanol oxidation reaction compared to the solid PtRu catalyst because of large surface area structure and ideal surface structure.
Online since: September 2009
Authors: Rodica Stancu, Paula Drob, Ecaterina Vasilescu, Cora Vasilescu, Mihaela Mindroiu, Cristian Pirvu
Oltenitei 103, Bucharest, Romania
3
Institute of Physical Chemistry, Spl.
It was resulted that the binder structure is decisive for the protective properties of the paint film.
So, the paint film with the AC binder, which has linear structure, presents the lowest performance.
But, the binders with three-dimensional structure improve the anticorrosion properties of the paint films.
The best performance is presented by the AL binder, which has a cross linking structure.
It was resulted that the binder structure is decisive for the protective properties of the paint film.
So, the paint film with the AC binder, which has linear structure, presents the lowest performance.
But, the binders with three-dimensional structure improve the anticorrosion properties of the paint films.
The best performance is presented by the AL binder, which has a cross linking structure.
Online since: July 2011
Authors: Guo Lin Jing, Wen Ting Du, Huan Yi, Xiang Chen
Prediction model in electrodialysis process based on ANFIS
Jing Guolin1,a, Du Wenting1,a, Chen Xiang2, Huan Yi3
1College of Chemistry and Chemical Engineering, Northeastern Petroleum University,
Daqing 163318, People’s Republic of China
2Oil Recovery Plant No.10, Daqing Oilfield Corp.Ltd., Daqing, Heilongjiang 163500, People’s Republic of China
3PetroChina Daqing No.2 Lubricating Oil Blending Plant, Daqing, Heilongjiang 163411, People’s Republic of China
ajingguolin@yahoo.cn
Key word: Electrodialysis, Fuzzy system, ANFIS, Prediction model
Abstract.
Besides, in the MATLAB, ANFIS(Adaptive Neuro-Fuzzy Inference System) based on Sugeno fuzzy model, its structure was similar to neural network and could generate fuzzy rules automatically.
ANFIS generated a model structure (Fig. 1): Voltage Flow rate Temperature Concentration SP input inputmf rule output outputmf Fig. 1 ANFIS node structure Experimental 1) Experimental principle Electrodialysis technology is one of membrane separation technologies.
Besides, in the MATLAB, ANFIS(Adaptive Neuro-Fuzzy Inference System) based on Sugeno fuzzy model, its structure was similar to neural network and could generate fuzzy rules automatically.
ANFIS generated a model structure (Fig. 1): Voltage Flow rate Temperature Concentration SP input inputmf rule output outputmf Fig. 1 ANFIS node structure Experimental 1) Experimental principle Electrodialysis technology is one of membrane separation technologies.
Online since: June 2010
Authors: Nai Xiang Jiang, Gui Zhen Fang, Shi Ya Han, Ming Hua Zhu, Zhan Qian Song, Wei Li
In this paper, the hydrophobic nano-calcium carbonate (CaCO3) was prepared by organic
matter (the bolaform surfactant Disodium Sulfodehydroabietate as template) modifying surface
structure of calcium carbonate (made by anhydrous sodium carbonate and anhydrous calcium
chloride) at 40°C for 2h.
Conclusion Due to template effect of surfactant micelle, the bolaform surfactant Disodium Sulfodehydroabietate as template, the hydrophobic nano-calcium carbonate (CaCO3) was prepared by reaction with the organic matter at 40°C for 2h to modify the surface structure of products.
XRD and TEM analysis indicated that nano-CaCO3 existed in calcite and rod-like structure, which contact angle with liquid solid was 117.49°.
Chemistry and Industry of Forest Products 2008, 28(1):103-107 fig.4 contact angle of CaCO3 measurement 20 40 60 80 intensity(a.u.) 2theta(degree) fig.3 XRD spectrum of CaCO3 fig.2 TEM spectrum of CaCO3
Conclusion Due to template effect of surfactant micelle, the bolaform surfactant Disodium Sulfodehydroabietate as template, the hydrophobic nano-calcium carbonate (CaCO3) was prepared by reaction with the organic matter at 40°C for 2h to modify the surface structure of products.
XRD and TEM analysis indicated that nano-CaCO3 existed in calcite and rod-like structure, which contact angle with liquid solid was 117.49°.
Chemistry and Industry of Forest Products 2008, 28(1):103-107 fig.4 contact angle of CaCO3 measurement 20 40 60 80 intensity(a.u.) 2theta(degree) fig.3 XRD spectrum of CaCO3 fig.2 TEM spectrum of CaCO3
Online since: December 2013
Authors: Milan Palko
ANSYS program structure in CFX module.
It has wide application in a range of sectors such as construction (statics, technical building equipment ...), chemistry (chemical reactions ...), health and safety (fire, smoke-quarts [5], evacuation ...), engineering (engine simulation, cars aerodynamics ...), electrical engineering (electromagnetics ...), environmental area (wind, water ...), medicine (blood flow in the arteries, heart ...).
The main structure of the program (module CFX) is described in Figure1 ..
In: ATF 2013: 2nd Conference on Acoustics, Light and Thermal Physics in Architecture and Building Structures.Book of proceedings.
It has wide application in a range of sectors such as construction (statics, technical building equipment ...), chemistry (chemical reactions ...), health and safety (fire, smoke-quarts [5], evacuation ...), engineering (engine simulation, cars aerodynamics ...), electrical engineering (electromagnetics ...), environmental area (wind, water ...), medicine (blood flow in the arteries, heart ...).
The main structure of the program (module CFX) is described in Figure1 ..
In: ATF 2013: 2nd Conference on Acoustics, Light and Thermal Physics in Architecture and Building Structures.Book of proceedings.
Online since: February 2008
Authors: Young Seok Kim, Kyu Ho Lee, Tae Ho Kim, Young Joon Jung, Bong Ki Ryu
It can be predicted that the glass
structure will be reinforced when B2O3 is replaced by ZnO until 10
mol% is reached.
IR spectra have been used for the analysis of glass structure [13] with aid of the identification of the coordination number of boron.
From the above results, it follows that when zinc is used to form glass networks at ZnO 10mol%, the glass structure is enhanced and that B CN converted to 3 from 4 and Zn CN to 6 from 4 weakening the glass structure when zinc is greater than ZnO 20mol%.
Molecular Structure Vol. 77 (1999), p. 511 [15] H.
Videau: Physics and Chemistry of Glasses Vol. 34 (1993), p. 212 Fig. 5 Rate of weight loss versus time of 20Bao-xZnO-(80-x)B2O3 glasses Fig. 6 IR spectra of 20Bao-xZnO-(80-x)B2O3
IR spectra have been used for the analysis of glass structure [13] with aid of the identification of the coordination number of boron.
From the above results, it follows that when zinc is used to form glass networks at ZnO 10mol%, the glass structure is enhanced and that B CN converted to 3 from 4 and Zn CN to 6 from 4 weakening the glass structure when zinc is greater than ZnO 20mol%.
Molecular Structure Vol. 77 (1999), p. 511 [15] H.
Videau: Physics and Chemistry of Glasses Vol. 34 (1993), p. 212 Fig. 5 Rate of weight loss versus time of 20Bao-xZnO-(80-x)B2O3 glasses Fig. 6 IR spectra of 20Bao-xZnO-(80-x)B2O3
Online since: June 2011
Authors: Wei Qiang Sun, Sheng Yong Xu, Yong Yang
Dielectric Constant Measurement of Liquids
Using Nanosecond-Pulsed Signals
Weiqiang Suna, Yong Yang and Shengyong Xub
Key Laboratory for the Physics and Chemistry of Nanodevices,
Department of Electronics, Peking University, Beijing, China
aswq-frank@163.com, bxusy@pku.edu.cn
Key words: Dielectric constant, Liquid material, Coaxial structure, Pulse signal
Abstract.
The copper wire (diameter ~ 0.5mm) works as the core of the coaxial structure, connecting with the two BNC connectors.
The whole coaxial structure is then put into the aluminum shielding box (Fig. 1a).
The diagram of the coaxial structure device for dielectric constant measurement of liquid materials.
Meanwhile, the impedance match required for a lossless transport in a coaxial structure cannot always be satisfied for different material, which can cause attenuation in experiments.
The copper wire (diameter ~ 0.5mm) works as the core of the coaxial structure, connecting with the two BNC connectors.
The whole coaxial structure is then put into the aluminum shielding box (Fig. 1a).
The diagram of the coaxial structure device for dielectric constant measurement of liquid materials.
Meanwhile, the impedance match required for a lossless transport in a coaxial structure cannot always be satisfied for different material, which can cause attenuation in experiments.
Online since: July 2011
Authors: Vishakantaiah Jayaram, Singh Preetam, K. P. J. Reddy
J. 2,c
1Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India.
2Department of Aerospace Engineering, Indian Institute of Science, Bangalore, India.
We confirmed the phase transformation and electronic structure of the material after exposure to shock by XRD and XPS studies.
Structures were refined by Rietveld method, using FullProf-fp2k program.
The powder X-ray results reveal that the compound crystallizing in the cubic fluorite structure (JCPDS No. 81-0792) with space group Fm-3m (No. 221).
In general, interaction of moderate shock pressure and high enthalpy gaseous species with solid materials for a short duration (2-6 ms) in a single pulse shock tube will opens up a new area of research in the material chemistry.
We confirmed the phase transformation and electronic structure of the material after exposure to shock by XRD and XPS studies.
Structures were refined by Rietveld method, using FullProf-fp2k program.
The powder X-ray results reveal that the compound crystallizing in the cubic fluorite structure (JCPDS No. 81-0792) with space group Fm-3m (No. 221).
In general, interaction of moderate shock pressure and high enthalpy gaseous species with solid materials for a short duration (2-6 ms) in a single pulse shock tube will opens up a new area of research in the material chemistry.