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Search Results: 1 - 10 of 28288 matches for " Deshuai Sun "
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Adsorption of Reactive Dyes on Activated Carbon Developed from Enteromorpha prolifera  [PDF]
Deshuai Sun, Zhongyi Zhang, Mengling Wang, Yude Wu
American Journal of Analytical Chemistry (AJAC) , 2013, DOI: 10.4236/ajac.2013.47A003

Activated carbon was prepared from Enteromorpha prolifera by zinc chloride activation. The adsorption behaviors of three reactive dyes (Reactive Red 23, Reactive Blue 171 and Reactive Blue 4) onto this biomass activated carbon were investigated in batch systems. The experimental findings showed that the removal efficiencies of three dyes onto activated carbon were maximum at the initial solution pH of 4.5 - 6.0. Thermodynamic studies suggested that adsorption reaction was an endothermic and spontaneous process. Adsorption isotherm of the three dyes obeyed Freundlich isotherm modal. Dye adsorption capacities of activated carbon were 59.88, 71.94 and 131.93 mg·g?1 for RR23, RB171 and RB4 at 27?C, respectively. Second-order kinetic models fitted better to the equilibrium data of three dyes. The adsorption process on activated carbon was mainly controlled by intraparticle diffusion mechanism.

Simulation of Particle Agglomeration in Turbulent Flow  [PDF]
Peiling Yan, Deshuai Sun, Yang Yu, Xiankun Shen, Yanfei Qi
Journal of Materials Science and Chemical Engineering (MSCE) , 2018, DOI: 10.4236/msce.2018.64006
Turbulence agglomeration is an effective way to promote agglomeration of particles. The coupling of classic Eulerian-Eulerian two-fluid model with population balance model was used to simulate the agglomeration process. The simulation results show that turbulence agglomeration could reduce 56% of emission of fine particles less than 10 μm. Smallest particles less than 2 μm were easily be removed, while the removal values of particles with medium size was very low. The suitable spacing of vanes was benefit to remove the fine particles from gas flow. Small angle of the vanes could improve the removal of fine particles.
Formal Derivation of the Combinatorics Problems with PAR Method  [PDF]
Lingyu SUN, Yatian SUN
Journal of Software Engineering and Applications (JSEA) , 2009, DOI: 10.4236/jsea.2009.23026
Abstract: Partition-and-Recur (PAR) method is a simple and useful formal method. It can be used to design and testify algo-rithmic programs. In this paper, we propose that PAR method is an effective formal method on solving combinatorics problems. Furthermore, we formally derive combinatorics problems by PAR method, which cannot only simplify the process of algorithmic program's designing, but also improve its automatization, standardization and correctness. We develop algorithms for two typical combinatorics problems, the number of string scheme and the number of error per-mutation scheme. Lastly, we obtain accurate C++ programs which are transformed by automatic transforming system of PAR platform.
Accuracy Improvement of PLIC-VOF Volume-Tracking Method Using the Equation of Surface Normal Vector  [PDF]
Mingyu Sun
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.31A031

The PLIC/SN method that combines the second-order volume tracking method (PLIC-VOF) with the equation of surface normal (SN) vector was recently proposed (M. Sun, Volume Tracking of Subgrid Particles, International Journal for Numerical Methods in Fluids, Vol. 66, No. 12, 2011, pp. 1530-1554). The method is able to track the motion of a subgrid particle, but the accuracy is not as good as expected on high resolution grids for vortical flows. In this paper, a simple unsplit multidimensional advection algorithm is coupled with the equation of SN vector. The advection algorithm is formulated as the finite volume method, so that it can be used readily for both structured and unstructured grids while maintaining the exact mass conservation. The new method improves the accuracy significantly for high resolution grids. In the well-known test of the time-resolved vortex problem of T = 2, the circular interface is resolved with an accuracy better than ever using the equation of SN vector.

Positive Solutions for a Boundary Value Problem with a Derivative Argument  [PDF]
Bo Sun
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.14014

In this paper, several existence results of multiple positive solutions are obtained for a boundary value problem with p-Laplacian, by applying a fixed point theorem in cones. The interesting point is that the nonlinear term f is involved with the first-order derivative explicitly.

Is Urban China’s CPI Underreported?  [PDF]
Sun Wenkai
Chinese Studies (ChnStd) , 2013, DOI: 10.4236/chnstd.2013.24024
Abstract: Many have doubts about statistics, including the consumer price index (CPI) released by Chinese Government. We re-estimate the CPI in urban China from 1997 to 2009, with two widely accepted approaches to treating owner-occupied housing (i.e., user cost approach and consumption cost approach). The results are not considerably different from the NBS statistics, especially for recent years.
Retrospect and Prospect of the Research into Chinese Hezhe Nationality  [PDF]
Yan Sun
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.28020
Abstract: Through the scientometric analysis of these sample documents is related to the ten-year academic researches on Chinese Hezhe nationality, it could find out that the continuous study in this field provides a solid intelligence support for the development of Chinese ethnic minorities. However, problems still exist for the present, that is, the research content need to be deepened while the research perspective is expanded. And what’s more, the lack of the comparative analysis and the empirical research also should be given more attention in the future study. This essay would like to focus on the existing disadvantages by strengthening the problem consciousness which can help improve the researchers’ concern over the Hezhe nationality, reinforce the comparative analysis and empirical research, enhance the comprehensive analysis of multi-disciplinary and multi-perspective and constantly promote the further development of the research in this field.
Several Classes of Permutation Polynomials over Finite Fields  [PDF]
Guanghong Sun
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24003

Several classes of permutation polynomials of the form \"\"  over finite fields are presented in this paper, which is a further investigation on a recent work of Li et al.

Fair Value and Its Economic Consequence on the Volatility Measures of Earnings, Stock Price and Government Debt Yield  [PDF]
Lan Sun
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.49114
Abstract: Many banks and commentators argued that fair value accounting was the root caused the procyclical decline in bank assets and capitals, the failures of large financial sector and extreme volatility in financial asset prices during the GFC. Fair value measurements may result in different figures for earnings and capital, both of which are important as buffers against insolvency. Fair value may also convey different messages to the market, either value relevance or volatility, it will lead to different economic consequences in allocating capital resource. This study is an attempt to review the studies of fair value and its impact on earnings volatility and stock price volatility and takes a step further it shows the way in which fair value could potentially introduce volatility into the financial system in particularly a mathematical derivation shows that the government bonds volatility is affected by earnings volatility and its decomposition of fair value and historical cost earnings volatilities. As such, fair value may contribute to a highly volatile market and general investors need to understand the tradeoff between fair value relevance and volatility in making an investment decision.
Exploring the Causes of Recruiting Failure  [PDF]
Linnan Sun
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.81005
Abstract: With the continuous development of social economy, competition among enterprises has evolved into the talent competition. Talents as the important resource of the enterprises have drawn extensive attention. As an important access for the enterprises to absorb talents, recruiting is not only the important means of achieving human resources increase in an organization, but also ensuring the long development of the organization. However, the work of recruiting human resources in many enterprises are inefficient or ineffectiveness. Given this, this paper summarizes the views of recruiting effectiveness according to the related literatures domestic and abroad, and it analyzes four key causes of recruiting failure and provides corresponding solutions.
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