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| 1 | A Globally Convergent Polak-Ribiere-Polyak Conjugate Gradient Method with Armijo-Type Line Search显示文摘In this paper, we propose a globally convergent Polak-Ribiere-Polyak (PRP) conjugate gradient method for nonconvex minimization of differentiable functions by employing an Armijo-type line search which is simpler and less demanding than those defined in [4,10]. A favorite property of this method is that we can choose the initial stepsize as the one-dimensional minimizer of a quadratic modelΦ(t):= f(xk)+tgkTdk+(1/2) t2dkTQkdk, where Qk is a positive definite matrix that carries some second order information of the objective function f. So, this line search may make the stepsize tk more easily accepted. Preliminary numerical results show that this method is efficient. | Gaohang Yu Lutai Guan Zengxin Wei | 2006 | Numerical Mathematics A Journal of Chinese Universities(English Series)2006，15，4： | 11 |
| 2 | Morphology cluster and prediction of growth of human brain pyramidal neurons显示文摘Predicting neuron growth is valuable to understand the morphology of neurons, thus it is helpful in the research of neuron classification. This study sought to propose a new method of predicting the growth of human neurons using 1 907 sets of data in human brain pyramidal neurons obtained from the website of NeuroMorpho.Org. First, we analyzed neurons in a morphology field and used an expectation-maximization algorithm to specify the neurons into six clusters. Second, naive Bayes classifier was used to verify the accuracy of the expectation-maximization algorithm. Experiment results proved that the cluster groups here were efficient and feasible. Finally, a new method to rank the six expectation-maximization algorithm clustered classes was used in predicting the growth of human pyramidal neurons. | Chao Yu Zengxin Han Wencong Zeng Shenquan Liu | 2012 | Neural Regeneration Research2012，7，1： | 2 |
| 3 | The Dynamic Experiment on Treating Acid Mine Drainage with Iron Scrap and Sulfate Reducing Bacteria Using Biomass Materials as Carbon Source显示文摘The study is aimed at the problem of high content of Cr^(6+),Cr^(3+)and SO_(4)^(2-)is high and low pH value in acid mine drainage(AMD).Moreover,treatment of AMD by sulfate reducing bacteria(SRB)requires the addition of carbon source,while the treating effectiveness is not good enough on its own.The sugarcane slag,the corn cob and the sunflower straw were selected as the SRB carbon source cooperating with iron scrap to construct the dynamic columns 1,2 and 3.The mechanism of removing Cr^(6+),Cr^(3+),SO_(4)^(2-)and H+and the regularity of sustained release of carbon source and TFe release was studied in AMD.The removal efficiency of heavy metal ions,the ability of sustained release of carbon source,and the ability of adjusting acid by the three dynamic columns were compared.The result shows that the average removal rates of Cr^(6+),Cr^(3+)and SO_(4)^(2-)in effluent of dynamic column 1,filled by sugarcane slag,iron scrap and SRB,were 96.9%,67.1%and 54.3%.The average release of TFe and chemical oxygen demand(COD)were 4.4 and 287.3 mg/L.Its average pH was 6.98.Compared with the performance of dynamic columns 1,2 and 3,dynamic column 1 performed best in removing Cr^(6+),Cr^(3+)and SO_(4)^(2-)from AMD and controlling the release of COD and TFe,adjusting the pH of the solution.The study is of significance in treatment of AMD by taking for biomass materials as SRB carbon source in cooperation with iron scrap. | Xianjun Wang Junzhen Di Yanrong Dong Yu Yang Bing Liang Fankang Meng Tingting Wang Wenbo An Zengxin Li Jianzhi Guo | 2021 | Journal of Renewable Materials2021，9，1： | 2 |
| 4 | A descent nonlinear conjugate gradient method for large-scale unconstrained optimization显示文摘 | Yu Gaohang Zhao Yanlin Wei Zengxin | 2007 | Applied Mathematics and Computation2007，183，： | 1 |
| 5 | A descent nonlinear conjugate gradient method for large-scale uncon- strained optimization 显示文摘 | Yu Gaohang Zhao Yanlin Wei Zengxin | 2007 | Applied Mathematics and Computation2007，187，： | 1 |
| 6 | A descent nonlin- ear conjugate gradient method for large - scale unconstrained optimization 显示文摘 | Yu Gaohang Zhao Yanlin Wei Zengxin | 2007 | Applied mathematics and computation2007，187，： | 1 |
| 7 | A descent nonlinear conjugate gradient method for large-scale unconstrained optimization 显示文摘 | Yu Gaohang Zhao Yanlin Wei Zengxin | 2007 | Applied Mathematics and Computation2007，187，2： | 1 |
| 8 | A Simple Analysis Method for Contact Deformation of Tire 显示文摘 | Yu Zengxin Tan Huifeng Du Xingwen | 2001 | Vehicle System Dynamics2001，36，6： | 1 |
| 9 | A descentnonlinear conjugate gradient method for large-scale un-constrained optimization显示文摘 | Gaohang Yu Yanlin Zhao Zengxin Wei | 2007 | Applied Mathematicsand Computation2007，187，2： | 1 |
| 10 | The superlinear convergence of a modified BFGS-type method for unconstrained opti- mization显示文摘 | Wei Zengxin Yu Gaoyang | 2004 | Computational Optimization and Applica- tion2004，，29： | 1 |
| 11 | SIX-VARIABLE GEOMETRICAL NONLINEAR LAMINATED THEORY FOR LARGE DEFORMATION显示文摘A six-variable geometrical nonlinear shear deformation laminated theory is presented bywhich normal stress and strain distribution can be calculated.By considering some affective factorsthat were neglected under the finite deformation condition,an improved yon Karman geometrical non-linear deformation-strain relation is used for large deformation analysis.After analyzing the bendingproblem of laminated plates,and comparing it with 3-D elasticity solutions and J.N.Reddy five-vari-able simple higher-order shear deformation laminated theory,we can conclude that a satisfactory cal-culation precision has been achieved,which shows that it is especially suitable for the calculation in thecondition of large deformation and the laminated thick plate analysis. | Tan Huifeng Yu Zengxin Du Xingwen | 1999 | Acta Mechanica Solida Sinica1999，12，3： | 0 |
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