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Search Results: 1 - 10 of 18985 matches for " Nana Gao "
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Probabilistic Fuzzy Regression Approach from the Point of View Risk  [PDF]
Nana Gao, Qiujun Lu
Journal of Data Analysis and Information Processing (JDAIP) , 2018, DOI: 10.4236/jdaip.2018.64010
Abstract: Fuzzy regression analysis is an important regression analysis method to predict uncertain information in the real world. In this paper, the input data are crisp with randomness; the output data are trapezoid fuzzy number, and three different risk preferences and chaos optimization algorithm are introduced to establish fuzzy regression model. On the basis of the principle of the minimum total spread between the observed and the estimated values, risk-neutral, risk-averse, and risk-seeking fuzzy regression model are developed to obtain the parameters of fuzzy linear regression model. Chaos optimization algorithm is used to determine the digital characteristic of random variables. The mean absolute percentage error and variance of errors are adopted to compare the modeling results. A stock rating case is used to evaluate the fuzzy regression models. The comparisons with five existing methods show that our proposed method has satisfactory performance.
Strong Local Non-Determinism of Sub-Fractional Brownian Motion  [PDF]
Nana Luan
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.613194
Abstract: Let \"\" be a subfractional Brownian motion in \"\" . We prove that \"\" is strongly locally nondeterministic.
Reasons, Consequences and Solutions to Anti-Business Logic Behavior of State-Owned Enterprises Controllers  [PDF]
Nana Zhang
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.88119
Abstract: Focusing on the anti-business logic behavior of state-owned enterprises controllers, this paper finds that the behavior is characterized by lack of cost constraints, control of commodity prices to make it lower than market equilibrium price, stressing on scale while neglecting efficiency, etc., which causes consequences of overcapacity in some state-owned enterprises, zombie enterprises, the loss of state-owned assets, financial burdens for the state, and unequal market status for private enterprises. Finally, the paper puts forward effective solutions.
Effects of Antimicrobial Peptide Revealed by Simulations: Translocation, Pore Formation, Membrane Corrugation and Euler Buckling
Licui Chen,Nana Jia,Lianghui Gao,Weihai Fang,Leonardo Golubovic
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms14047932
Abstract: We explore the effects of the peripheral and transmembrane antimicrobial peptides on the lipid bilayer membrane by using the coarse grained Dissipative Particle Dynamics simulations. We study peptide/lipid membrane complexes by considering peptides with various structure, hydrophobicity and peptide/lipid interaction strength. The role of lipid/water interaction is also discussed. We discuss a rich variety of membrane morphological changes induced by peptides, such as pore formation, membrane corrugation and Euler buckling.
Construction of the 1,2-Dialkenylcyclohexane Framework via Ireland-Claisen Rearrangement and Intramolecular Barbier Reaction: Application to the Synthesis of (±)-Geijerone and a Diastereoisomeric Mixture with Its 5-Epimer
Dawei Liang,Nana Gao,Wei Liu,Jinhua Dong
Molecules , 2014, DOI: 10.3390/molecules19011238
Abstract: The elemene-type terpenoids, which possess various biological activities, contain a syn- or anti-1,2-dialkenylcyclohexane framework. An efficient synthetic route to the syn- and anti-1,2-dialkenylcyclohexane core and its application in the synthesis of (±)-geijerone and its diastereomer is reported. Construction of the syn- and anti-1,2-dialkenyl moiety was achieved via Ireland-Claisen rearrangement of the ( E)-allylic ester, and the cyclohexanone moiety was derived from the iodoaldehyde via intramolecular Barbier reaction. The synthetic strategy allows rapid access to various epimers and analogues of elemene-type products.
Effects of Teachers Level of Education and Experience on Teacher-Child Interactions in Early Childhood Institutions  [PDF]
Nana Yaa Nyarko, Hillar Addo
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.411131
Abstract:

Early childhood care and development (ECCD) in Ghana have received attention in the lat decade. To ensure quality of instruction and build capacity of early childhood teachers and caregivers, the National Nursery Teachers’ Training Centre was set up by the government to offer specialized training in nursery education for teachers and nursery attendants. Universities and the Colleges of Education have been mandated to train teachers for early childhood education. This study therefore sought to find out the effects of level of education and years of experience of teachers on their interactions with children (3 - 5) in early-childhood institutions in Ghana using the Caregiver Child Interaction Scale (r = 0.77). The sample (N = 103; Female 99%): made up of teachers from thirty-one preschools in the Greater Accra Region of Ghana were observed during their normal classroom routine. There appeared not to be any statistically significant difference between the teachers’ level of education and years of experience on the interaction scores.

Generalization of the Global Error Minimization for Constructing Analytical Solutions to Nonlinear Evolution Equations  [PDF]
Serge Bruno Yamgoué, Bonaventure Nana
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.39142
Abstract: The global error minimization is a variational method for obtaining approximate analytical solutions to nonlinear oscillator equations which works as follows. Given an ordinary differential equation, a trial solution containing unknowns is selected. The method then converts the problem to an equivalent minimization problem by averaging the squared residual of the differential equation for the selected trial solution. Clearly, the method fails if the integral which defines the average is undefined or infinite for the selected trial. This is precisely the case for such non-periodic solutions as heteroclinic (front or kink) and some homoclinic (dark-solitons) solutions. Based on the fact that these types of solutions have vanishing velocity at infinity, we propose to remedy to this shortcoming of the method by averaging the product of the residual and the derivative of the trial solution. In this way, the method can apply for the approximation of all relevant type of solutions of nonlinear evolution equations. The approach is simple, straightforward and accurate as its original formulation. Its effectiveness is demonstrated using a Helmholtz-Duffing oscillator.
-Estimates of the Bergman projection in the Lie ball of
Cyrille Nana
Journal of Function Spaces and Applications , 2011, DOI: 10.1155/2011/291620
Abstract: In this paper, we consider estimates with loss for the Bergman projections of bounded symmetric domains of ℂn in their Harish-Chandra realizations. This paper is twofold: on one side we develop transfer methods between these bounded domains and their Cayley transform; on the other side we give a new range of q such that the Bergman projection is bounded from L∞(ℬn) to Lq(ℬn) where ℬn is the Lie ball of ℂn.
-Estimates of the Bergman projection in the Lie ball of
Cyrille Nana
Journal of Function Spaces , 2011, DOI: 10.1155/2011/291620
Abstract: In this paper, we consider estimates with loss for the Bergman projections of bounded symmetric domains of ? n in their Harish-Chandra realizations. This paper is twofold: on one side we develop transfer methods between these bounded domains and their Cayley transform; on the other side we give a new range of q such that the Bergman projection is bounded from L ∞ ( ? n ) to L q ( ? n ) where ? n is the Lie ball of ? n .
Hilbert Huang Transform for Predicting Proteins Subcellular Location  [PDF]
Feng SHI, Qiujian CHEN, Nana LI
Journal of Biomedical Science and Engineering (JBiSE) , 2008, DOI: 10.4236/jbise.2008.11009
Abstract: Apoptosis proteins have a central role in the development and homeostasis of an organism. These proteins are very important for the understanding the mechanism of programmed cell death, and their function is related to their types. The apoptosis proteins are categorized into the following four types: (1) Cytoplasmic protein; (2) Plasma membrane-bound protein; (3) Mitochondrial inner and outer proteins; (4) Other proteins. A novel method, the Hilbert-Huang transform, is applied for predicting the type of a given apoptosis protein with support vector machine. High success rates were obtained by the re-substitute test (98/98=100%), jackknife test (91/98 = 92.9%).
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