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Search Results: 1 - 10 of 120115 matches for " Wang Yilin "
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Research on Constructing Innovation-Driven Development Evaluation System Based on the Essential Component of Intellectual Property  [PDF]
Yueping Du, Yilin Wang
Open Journal of Business and Management (OJBM) , 2017, DOI: 10.4236/ojbm.2017.51014
Abstract: The innovation-driven development strategy based on the essential component of intellectual property is an important strategy in the new period of China. Based on the understanding of generalized innovation and the model of input-output, the article analyzes the support for innovation-driven development of intellectual property, and from three aspects of intellectual property: investment, conversion and output, starting to build a model of three first-level indicators and twenty-four secondary indicators to evaluate the innovation-driven economic development based on the essential component of intellectual property.
The Fracture Density and Fractal Dimension Prediction Based on Support Vector Machine  [PDF]
Lei Zhao, Liehui Zhang, Yilin Wang
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.44062
Abstract:

The key of effective development for the fractured reservoir is to describe the distribution of the fracture and build the fracture geological model. To acquire more optimal exploration and development of the oilfield, objective geologic model of reservoir fractures is needed for further knowledge of the spatial distribution condition of fractures. Adopting well-logging and seismic techniques can be expensive and usually yield multiple solutions, yet resolution will disturb the seismic method, making it difficult to acquire accurate and sound fracture parameters from seismic data. In this paper, the theoretical foundation for support vector machine, fractal geometry, combined the various information in geology, logging, well core, seism and field outcrop about the fracture and calculate the parameters of the fracture (fracture density and fractal dimension), and the good foundation is established for fractured reservoir description of discrete fracture network model. Based on analysis of conventional prediction methods of development indices and factor influencing the parameters of the fracture, a support vector machine method is established to predict the parameters of the fracture. The new support vector machine method is based on time series analysis to select the kernel function. Trains and tests the support vector machine network with historical data to construct the support vector regression prediction model. A case was fit into the model to test and analyse its reliability, the results suggested that the model had a high prediction performance, and could be well applied to the prediction of fracture parameters.

ONE-POT SYNTHESIS OF HIGHLY LUMINESCENT CdTe QUANTUM DOTS USING SODIUM TELLURITE AS TELLURIUM SOURCE IN AQUEOUS SOLUTION
WANG,YILIN; LIU,SHENGYAN;
Journal of the Chilean Chemical Society , 2012, DOI: 10.4067/S0717-97072012000200011
Abstract: a novel technology has been developed for the synthesis of thioglycolic acid (tga)-capped cdte quantum dots (qds) in aqueous medium. the reaction was carried out in air atmosphere with one-pot by using na2teo3 to replace te or al2te3. the mechanism for the formation of cdte qds is elucidated. the influences of various experimental variables, including refluxing time, ph value, cd/te and cd/tga molar ratios, on the luminescent properties of the obtained cdte qds have been systematically investigated. furthermore, the obtained qds were characterized by fourier transform infrared spectra (ftir), x-ray powder diffraction (xrd) and transmission electron microscopy (tem), respectively. the results demonstrate that, under the optimized experimental conditions, the obtained cdte qds exhibited a narrow photoluminescence band (fwhm33-45 nm) with reproducible room-temperature quantum yields as high as 28 %, the emission color is tunable from green to orange with increasing diameter of qds.
ONE-POT SYNTHESIS OF HIGHLY LUMINESCENT CdTe QUANTUM DOTS USING SODIUM TELLURITE AS TELLURIUM SOURCE IN AQUEOUS SOLUTION
YILIN WANG,SHENGYAN LIU
Journal of the Chilean Chemical Society , 2012,
Abstract: A novel technology has been developed for the synthesis of thioglycolic acid (TGA)-capped CdTe quantum dots (QDs) in aqueous medium. The reaction was carried out in air atmosphere with one-pot by using Na2TeO3 to replace Te or Al2Te3. The mechanism for the formation of CdTe QDs is elucidated. The influences of various experimental variables, including refluxing time, pH value, Cd/Te and Cd/TGA molar ratios, on the luminescent properties of the obtained CdTe QDs have been systematically investigated. Furthermore, the obtained QDs were characterized by fourier transform infrared spectra (FTIR), X-ray powder diffraction (XRD) and transmission electron microscopy (TEM), respectively. The results demonstrate that, under the optimized experimental conditions, the obtained CdTe QDs exhibited a narrow photoluminescence band (fwhm33-45 nm) with reproducible room-temperature quantum yields as high as 28 %, the emission color is tunable from green to orange with increasing diameter of QDs.
Dynamical screening in strongly correlated metal SrVO3
Li Huang,Yilin Wang
Physics , 2012, DOI: 10.1209/0295-5075/99/67003
Abstract: The consequences of dynamical screening of Coulomb interaction among correlated electrons in realistic materials have not been widely considered before. In this letter we try to incorporate a frequency dependent Coulomb interaction into the state-of-the-art ab initio electronic structure computing framework of local density approximation plus dynamical mean-field theory, and then choose SrVO3 as a prototype material to demonstrate the importance of dynamical screening effect. It is shown to renormalise the spectral weight near the Fermi level, to increase the effective mass, and to suppress the t2g quasiparticle band width apparently. The calculated results are in accordance with very recent angle-resolved photoemission spectroscopy experiments and Bose factor ansatz calculations.
Dynamical Screening Effect on Local Two-Particle Vertex Functions
Li Huang,Yilin Wang
Physics , 2013,
Abstract: In principle, the electronic Coulomb interaction among the correlated orbitals is frequency-dependent. Though it is generally believed that the dynamically screened interaction may play a crucial role in understanding the subtle electronic structures of strongly correlated materials, hitherto we know very little about it. In the Letter, we demonstrate that within the framework of single-site dynamical mean-field theory the local two-particle Green's functions $\chi$ and vertex functions $\Gamma$ are strongly modified by the dynamically screened interaction. Since both $\chi$ and $\Gamma$ represent the main ingredients to compute momentum-resolved response functions and to treat non-local spatial correlations by means of diagrammatic extensions of dynamical mean-field theory, it is urgent to reexamine previous results by taking the dynamical screening effect into account. The modifications should be very considerable.
DETERMINATION OF IRON IN CHINESE HERBAL MEDICINE BASED ON THE FLUORESCENCE QUENCHING OF RHODAMINE 6G
Yilin Wang, Jianping Lu, Hong Yang
Bulletin of the Chemical Society of Ethiopia , 2009,
Abstract: A fluorescence quenching method was developed for determination of Fe3+ with rhodamine 6G as fluorescent reagent. Fe3+ reacting with KI in diluted sulfuric acid produced I3- anion which reacted subsequently with rhodamine 6G to form a non-fluorescence compound. As a result, the compound quenched the fluorescence intensity of the system. The fluorescence intensity decreased linearly with the Fe3+ concentration in the range from 20 to 200 μg/L. The detection limit was 8.3 μg/L. This method has been applied to determine the iron in Chinese herbal medicine with satisfactory results. KEY WORDS: Rhodamine 6G, Fluorescence quenching, Iron Bull. Chem. Soc. Ethiop. 2009, 23(1), 113-116.
Determination of iron in chinese herbal medicine based on the fluorescence quenching of rhodamine 6G
Yilin Wang,Jianping Lu,Hong Yang
Bulletin of the Chemical Society of Ethiopia , 2009,
Abstract: A fluorescence quenching method was developed for determination of Fe3+ with rhodamine 6G as fluorescent reagent. Fe3+ reacting with KI in diluted sulfuric acid produced I3- anion which reacted subsequently with rhodamine 6G to form a non-fluorescence compound. As a result, the compound quenched the fluorescence intensity of the system. The fluorescence intensity decreased linearly with the Fe3+ concentration in the range from 20 to 200 μg/L. The detection limit was 8.3 μg/L. This method has been applied to determine the iron in Chinese herbal medicine with satisfactory results.
Orbital-Selective Mott Transition and Evolution of the Zhang-Rice State in Cubic Phase UO$_{2}$ Under Pressure
Li Huang,Yilin Wang,Philipp Werner
Physics , 2015,
Abstract: We study the electronic structure of cubic phase uranium dioxide at different volumes using a combination of density functional theory and dynamical mean-field theory. The \emph{ab initio} calculations predict an orbital-selective Mott insulator-metal transition at a moderate pressure of $\approx 45$ GPa. At this pressure the $j=5/2$ states become metallic, while the $j=7/2$ states remain insulating up to about 60 GPa. In the metallic state, we observe a rapid decrease of the 5$f$ occupation and total angular momentum with pressure. Simultaneously, the generalized Zhang-Rice state, which is of predominantly $j=5/2$ character, quickly disappears after the transition into the metallic phase.
Lattice Boltzmann method for shape optimization of fluid distributor
Limin Wang,Yilin Fan,Lingai Luo
Physics , 2013, DOI: 10.1016/j.compfluid.2014.01.034
Abstract: This paper presents the shape optimization of a flat-type arborescent fluid distributor for the purpose of process intensification. A shape optimization algorithm based on the lattice Boltzmann method (LBM) is proposed with the objective of decreasing the flow resistance of such distributor at the constraint of constant fluid volume. Prototypes of the initial distributor as well as the optimized one are designed. Fluid distribution and hydraulic characteristics of these distributors are investigated numerically. Results show that the pressure drop of the optimized distributor is between 15.9% and 25.1% lower than that of the initial reference while keeping a uniform flow distribution, demonstrating the process intensification in fluid distributor, and suggesting the interests of the proposed optimization algorithm in engineering optimal design.
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