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Search Results: 1 - 10 of 17075 matches for " Paixian Fu "
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How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels
Dianzhong Li,Xing-Qiu Chen,Paixian Fu,Xiaoping Ma,Hongwei Liu,Yun Chen,Yikun Luan,Yiyi Li
Physics , 2013,
Abstract: The phenomenon, channel segregates (CS) as a result of gravity-driven flow due to density contrast occurred in the solid-liquid mushy zones1during solidification, often causes the severe destruction of homogeneity and even some fatal damages. Investigation on its mechanism sheds light on the understanding and controlling of the formation of solidifying metals,earth's core, igneous rock and sea ice. Until now, it still remains controversial what composes the density contrasts and, to what extent, how it affects channel segregates. Here, we show that in experimental 500kg and 100 ton commercial cast steel ingots CS originates from oxide Al2O3/MnS impurity clusters (OICs) initially nucleated from the oxide (Al2O3) particles, which induce an extra flow due to sharp density contrast between clusters and melt. The results uncover that, as OICs enrich and grow, their driven flow becomes stronger than the traditionally recognized inter-dendritic thermo-solutal convection, dominating the subsequent opening of the channels. This study extends the classical macrosegregation theory, highlights a significant technological breakthrough to control CS, and could quickly yield practical benefits to the worldwide manufacture of over 50 million tons of ingots, super-thick slab and heavy castings annually, as well as has general implications for the elaboration of other related natural phenomena.
Research on the High-Tech Enterprise Performance Index System  [PDF]
Lan Fu, Rong Fu
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.23008
Abstract:

The purpose of this essay is to design a framework of a performance system which is subject to the characteristics of China high-tech enterprises. It is based on analyzing the principles and significance of the performance system of high-tech enterprises. The framework will promote the standardization management of high-tech enterprises of China.

Extended TOPSISs for Belief Group Decision Making  [PDF]
Chao Fu
Journal of Service Science and Management (JSSM) , 2008, DOI: 10.4236/jssm.2008.11002
Abstract: Multiple attribute decision analysis (MADA) problems in the situation of belief group decision making (BGDM) are a special class of decision problems, where the attribute evaluations of each decision maker (DM) are represented by belief functions. In order to solve these special problems, in this paper, TOPSIS (technique for order preference by similarity to ideal solution) model is extended by three approaches, by which group preferences are aggregated in different manners. Corresponding to the three approaches, three extended TOPSIS models, the pre-model, post-model, and inter-model, are developed and their procedures are elaborated step by step. Aggregating group preferences in the three extended models respectively depends on Dempster’s rule or its modifications, some social choice functions, and some mean approaches. Furthermore, a numerical example clearly illustrates the procedures of the three extended models for BGDM.
Research on the Technology Enterprise Performance Evaluation Index System  [PDF]
Lan Fu
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.53B002
Abstract:

The purpose of this essay is to design a framework of a performance evaluation system which is subject to the characteristics of China technology enterprises. It based on the analyzing the principles and significance of the performance evaluation system of technology enterprises. The framework will promote the standardize management of technology enterprises of China.

A Modified Pareto Dominance Based Real-Coded Genetic Algorithm for Groundwater Management Model  [PDF]
Fu Li
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.612100
Abstract: This study proposes a groundwater management model in which the solution is performed through a combined simulation-optimization model. In the proposed model, a modular three-dimensional finite difference groundwater flow model, MODFLOW is used as simulation model. This model is then integrated with an optimization model, in which a modified Pareto dominance based Real-Coded Genetic Algorithm (mPRCGA) is adopted. The performance of the proposed mPRCGA based management model is tested on a hypothetical numerical example. The results indicate that the proposed mPRCGA based management model is an effective way to obtain good optimum management strategy and may be used to solve other type of groundwater simulation-optimization problems.
Research on the Construction of the Emergency Logistics System in the Large State-Owned Enterprises  [PDF]
Lan Fu
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.29010
Abstract:

The purpose of this essay is to discuss some issues about the government how to improve the construction of the infrastructures, transportation system and communication system and how to enhance the capability of resisting natural disaster as the disaster comes. Emergent logistics information system not only can help the power group to collect information and forecast the future disaster but also has the function of decision-making and supporting. Furthermore the emergency logistics information system can assist the power group to decrease the loss from the disaster.

The Discriminate Analysis and Dimension Reduction Methods of High Dimension  [PDF]
Lan Fu
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.33002
Abstract:

Statistical methods have been getting constant development since 1970s. However, the statistical methods of the big data are no longer restricted with these methods which are listed in the textbook. This paper mainly demonstrates the Discrimination Analysis of Multivariate Statistical Analysis, Linear Dimensionality Reduction and Nonlinear Dimensionality Reduction Method under the circumstances of the wide range of applications of high-dimensional data. This paper includes three parts. To begin with, the paper illustrates a developing trend from the data to the high-dimensional. Meanwhile, it analyzes the impacts of the high-dimensional data on discriminate analysis methods. The second part represents the necessity of the dimensionality reduction studies in the era of the high-dimensional data overflowing. Then, the paper focuses on introducing the main methods of the linear dimensionality reduction. In addition, this paper covers the basic idea of the nonlinear dimensionality reduction. Moreover, it systematically analyzes the breakthrough of the traditional methods. Furthermore, it chronologically demonstrates the developing trend of the dimensionality reduction method. The final part shows a comprehensive and systematic conclusion to the whole essay and describes a developing prospect of the dimension reduction methods in the future. The purpose of this essay is to design a framework of a performance system which is subject to the characteristics of China High-tech enterprises. It based on the analysing the principles and significance of the performance system of High-tech enterprises. The framework will promote the standardize management of High-tech enterprises of China.

Oxidative Stress Induced by CuO Nanoparticles (CuO NPs) to Human Hepatocarcinoma (HepG2) Cells  [PDF]
Xin Fu
Journal of Cancer Therapy (JCT) , 2015, DOI: 10.4236/jct.2015.610097
Abstract: The toxicity of CuO nanoparticles (CuO NPs) to human hepatocarcinoma (HepG2) cells was investigated in this study. CuO NPs (1 - 40 mg/L) had significant toxicity to HepG2 cells. The antioxidant N-acetyl-L-cysteine (NAC) significantly reduces the cytotoxicity induced by the CuO NPs, supporting the hypothesis that oxidative stress contributes to the cytotoxicity of CuO NPs. To further explore the oxidative mechanisms of cytotoxicity, we examined CuO NPs-induced production of reactive oxygen species (ROS) in HepG2 cells. CuO NPs generated intracellular ROS in HepG2 cells in a concentration-dependent manner.
RETRACTED: The Validation of a Week-Long Questionnaire against Objective Measures of Light Exposure among a Sample of University Students  [PDF]
Chaojun Fu
Open Journal of Ophthalmology (OJOph) , 2015, DOI: 10.4236/ojoph.2015.52013
Abstract:

Short Retraction Notice

The author of the paper has no right to publish this article under his own and sole name. This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. Aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

Editor guiding this retraction: Dr. Pinakin Gunvant Davey (EiC of OJOph)

The full retraction notice in PDF is preceding the original paper, which is marked \"RETRACTED\".

Does Indirect Tax Increase the Income Gap between Urban and Rural Areas?
—Based on the Analysis of Thayer Index
 [PDF]

Rong Fu
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.41021
Abstract: In the process of economic and social development, serious income gap exists between urban and rural areas in our country, indirect tax—as our main taxes should play income distribution function to narrow the income gap between urban and rural areas. By using the consumption expenditure data of urban residents, the indirect tax burden of urban residents is estimated. The indirect tax burden of rural residents will be estimated by using the indirect tax data and the rural population. Compared with their respective income levels, we can draw the conclusion that the indirect tax is regressive between urban and rural residents. Using Tal index between 1994 and 2013 to measure urban and rural residents income gap, the empirical analysis of commodity tax shows that value added tax has a negative effect on income gap between urban and rural areas; business tax and consumption tax has a positive effect on income gap between urban and rural areas. However, negative effects brought by the VAT tax are greater than the business tax and consumption tax, indirect tax whose main body is VAT is worsening income distribution as a whole. The reform program to replace the business tax with a value-added tax will be expanded so that the proportion of value added tax will further increase. Combined with the empirical results, we put forward the policy which can perfect the indirect tax’s influence on income gap between urban and rural areas.
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