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Search Results: 1 - 10 of 104083 matches for " Yanjie Zhang "
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On the Average Errors of Multivariate Lagrange Interpolation  [PDF]
Zengbo Zhang, Yanjie Jiang
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.16001

In this paper, we discuss the average errors of multivariate Lagrange interpolation based on the Chebyshev nodes of the first kind. The average errors of the interpolation sequence are determined on the multivariate Wiener space.

The Average Errors for Linear Combinations of Bernstein Operators on the Wiener Space*  [PDF]
Yanjie Jiang, Ziqing Zhang
Journal of Data Analysis and Information Processing (JDAIP) , 2013, DOI: 10.4236/jdaip.2013.14009

In this paper, we discuss the average errors of function approximation by linear combinations of Bernstein operators. The strongly asymptotic orders for the average errors of the combinations of Bernstein operators sequence are determined on the Wiener space.

Effects of Stratification and Hormone Treatments on Germination and Physio-Biochemical Properties of Taxus chinensis var. mairei Seed  [PDF]
Yanjie Zhang, Shunbao Lu, Handong Gao
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.37100
Abstract: In order to learn dormancy mechanism of Taxtts chinensis var. mairei seed, effects of stratification and hormone treatments on physiological and biochemical indexes of the seeds after stratifying for eight months were researched. The content of amylase activity and soluble sugar gradually increased at first stratification, and then to the maximum for the end of after-ripening period. With the dormancy of seed relieving, some soluble sugar of endosperm was used or consumed by respiration and that led to their content decreased. Seed soluble protein was gradually accumulated at the beginning of stratification and then the initial raw material of protein synthesis of embryo during development had been used or in part converted into carbohydrates for energy consumption, so that the soluble protein content decreased. The fat and starch content slowly decreased during stratification, which showed that the storage of material had continually carrying out catabolism and conversion, which might provide energy sources for seed germination in the stratification process. The peroxidase activity of Taxus seeds increased gradually at the beginning of stratification, and then reached maximum point during stratification for 4 months in A1 and A2. The G-6-PDH and 6-PGDH joint activity was rapidly increased to reach the maximum during stratification for 4 months in A1, which showed the pentose phosphate pathway was activated at this time. The peroxidase activity rapidly increased might also be related to respiratory metabolic pathway during stratification. In plants, acid phosphatase hydrolyze PAM metabolites, namely phosphate material was related to energy metabolism, especially to high-energy phosphate, and phosphate enzyme activity changes affected the energy metabolism. The acid phosphatase activity of Taxus seeds in different treatments has no significant changes during stratification process, but there were two maximums. Energy metabolism might get benefit from the increase of acid phosphatase activity. There were significant differences in amylase activity, peroxidase activity, soluble sugar and soluble protein content with different treatments. Effect of promoting seed germination soaked by GA before stratification was obvious, but the concentration of GA should not be too high. The high concentration of GA caused seed to rot and reduce the seed germination rate. In this study, the highest germination rate of seed was 71.8% and soaked in 200 mg·L-1 gibberellin.
An Optimal Inequality for One-Parameter Mean  [PDF]
Hongya Gao, Yanjie Zhang, Tian Wang
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.15006

In the present paper, we answer the question: for 0 < α < 1 fixed, what are the greatest value p(a) and the least

value q(a) such that the inequality.

For more information about abstract,please download the PDF file.

Overview of Stabilizing Ligands for Biocompatible Quantum Dot Nanocrystals
Yanjie Zhang,Aaron Clapp
Sensors , 2011, DOI: 10.3390/s111211036
Abstract: Luminescent colloidal quantum dots (QDs) possess numerous advantages as fluorophores in biological applications. However, a principal challenge is how to retain the desirable optical properties of quantum dots in aqueous media while maintaining biocompatibility. Because QD photophysical properties are directly related to surface states, it is critical to control the surface chemistry that renders QDs biocompatible while maintaining electronic passivation. For more than a decade, investigators have used diverse strategies for altering the QD surface. This review summarizes the most successful approaches for preparing biocompatible QDs using various chemical ligands.
An Optimal Double Inequality among the One-Parameter, Arithmetic and Geometric Means  [PDF]
Hongya Gao, Shuangli Li, Yanjie Zhang, Hong Tian
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.17001

In the present paper, we answer the question: for 0< a <1 fixed, what are the greatest value p(a)

and the least value q(a) such that the double inequality Jp(a,b)< aA(a,b)+ (1-a)G(a,b)<Jq(a,b)

holds for all a,b>0 with a is not equal to b ?

Integrability for Solutions of Anisotropic Obstacle Problems
Hongya Gao,Yanjie Zhang,Shuangli Li
International Journal of Mathematics and Mathematical Sciences , 2012, DOI: 10.1155/2012/549285
Abstract: This paper deals with anisotropic obstacle problem for the -harmonic equation ∑=1((,()))=0. An integrability result is given under suitable assumptions, which show higher integrability of the boundary datum, and the obstacle force solutions have higher integrability as well.
Preparation of hydroxyapatite ceramic through centrifugal casting process using ultra-fine spherical particles as precursor and its decomposition at high temperatures
Yanjie Zhang,Jinjun Lu,Shengrong Yang
Journal of Advanced Ceramics , 2012, DOI: 10.1007/s40145-012-0006-0
Abstract: Ultra-fine hydroxyapatite (HAp) powder with a diameter of about 10 nm was used as precursor for preparation of HAp ceramic. The precursor hydroxyapatite was single phase and highly crystallized without any additional thermal treatment. Highly densified HAp ceramic was fabricated through centrifugal infiltration casting (CIC), followed by pressureless sintering. The relative densities of compacts prepared at 1100°C and 1200°C were 77.8% and 94.1%, respectively. SEM micrographs of HAp ceramic sintered at 1100°C showed a porous microstructure with a grain size of 1 μm. HAp ceramic fabricated at 1200°C revealed a dense microstructure with nano-sized spherical α-TCP distributed at grain boundaries and triple points. The mechanism of decomposition from HAp to α-TCP at 1200°C was discussed on the basis of SEM, XRD and FTIR results.
Establishment of Output Models and Constraints Analysis for Independent Wind/PV/Storage System  [PDF]
Linjing Hu, Yanjie Fu
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.29015

In remote areas far from the grid, wind/PV/storage generating system is relatively a good choice, whatever in resource configuration, performance or prices. For the independent hybrid power system, the output models of wind turbines, photovoltaic arrays and batteries are built in this paper, and based on the objectives of the capacity configuration optimal model, constraints used in the process of capacity configuration are analyzed. These provide convenient conditions and theoretical basis for the optimal capacity configuration of independent wind/PV/storage system.

H2 Enhances Arabidopsis Salt Tolerance by Manipulating ZAT10/12-Mediated Antioxidant Defence and Controlling Sodium Exclusion
Yanjie Xie, Yu Mao, Diwen Lai, Wei Zhang, Wenbiao Shen
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0049800
Abstract: Background The metabolism of hydrogen gas (H2) in bacteria and algae has been extensively studied for the interesting of developing H2-based fuel. Recently, H2 is recognized as a therapeutic antioxidant and activates several signalling pathways in clinical trials. However, underlying physiological roles and mechanisms of H2 in plants as well as its signalling cascade remain unknown. Methodology/Principal Findings In this report, histochemical, molecular, immunological and genetic approaches were applied to characterize the participation of H2 in enhancing Arabidopsis salt tolerance. An increase of endogenous H2 release was observed 6 hr after exposure to 150 mM NaCl. Arabidopsis pretreated with 50% H2-saturated liquid medium, mimicking the induction of endogenous H2 release when subsequently exposed to NaCl, effectively decreased salinity-induced growth inhibition. Further results showed that H2 pretreatment modulated genes/proteins of zinc-finger transcription factor ZAT10/12 and related antioxidant defence enzymes, thus significantly counteracting the NaCl-induced reactive oxygen species (ROS) overproduction and lipid peroxidation. Additionally, H2 pretreatment maintained ion homeostasis by regulating the antiporters and H+ pump responsible for Na+ exclusion (in particular) and compartmentation. Genetic evidence suggested that SOS1 and cAPX1 might be the target genes of H2 signalling. Conclusions Overall, our findings indicate that H2 acts as a novel and cytoprotective regulator in coupling ZAT10/12-mediated antioxidant defence and maintenance of ion homeostasis in the improvement of Arabidopsis salt tolerance.
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