Immobilization of uranium soil with nHAP and composite

Research on Chemical Intermediates - One of the more concerning issues in the world today is that radioactive uranium contaminates the soil and threatens the organisms. The focus of contaminated...     

多目标子空间搜索演化算法MOSSSEA

在研究已有的求解多目标函数优化问题的演化算法的基础上,提出了一个结合Rank排名和子空间搜索的新的以杂交为主的演化算法MOSSSEA(Multi-Object Sub-Space Search Evolutionary Algorithm),将MOSSSEA应用到求解静态多目标函数优化问题中.一组测试函数的结果表明MOSSSEA表现出了优于同类算法的收敛性和多样性.     

氧存在下钙钛矿LaCoO3硫化过程的XPS研究

 采用XPS,XRD和TEM对含氧气氛下钙钛矿LaCoO3硫化活化过程中不同阶段的催化剂进行了表征分析．在硫化初期,经SO2预中毒后,吸附氧种不存在,Co2p3／2结合能发生明显的位移,La3d的XPS双峰变得不明显,同时出现不稳态的S4＋物种,表明催化剂LaCoO3被SO2的强吸附所覆盖;催化剂LaCoO3仍为钙钛结构并没有新的物相产生,SO2中毒仅在催化剂表面进行．在进一步的硫化活化过程中,出现吸附氧物种,Co出现三种价态,分别对应于LaCoO3,Co3O4和CoSO4,La3d的XPS双峰变得特别明显,同时催化剂表面出现S2－物种和S6＋物种．可以认为,在含氧气氛下硫化LaCoO3的过程中,SO2预中毒为进一步硫化提供硫物种,吸附氧物种保证硫化过程中钙钛矿结构不会被完全破坏．     

Isotonicity of the Metric Projection and Complementarity Problems in Hilbert Spaces

In this paper, as the extension of the isotonicity of the metric projection, the isotonicity characterizations with respect to two arbitrary order relations induced by cones of the metric projection operator are studied in Hilbert spaces, when one cone is a subdual cone and some relations between the two orders hold. Moreover, if the metric projection is not isotone in the whole space, we prove that the metric projection is isotone in some domains in both Hilbert lattices and Hilbert quasi-lattices. By using the isotonicity characterizations with respect to two arbitrary order relations of the metric projection, some solvability and approximation theorems for the complementarity problems are obtained. Our results generalize and improve various recent results in the field of study.     

加一张纸的别样复习课

"教师之为教,不在全盘授予,而在相机诱导."这是叶圣陶写给所有教师的一句名言,一直激励着笔者在教育实践中不断拓宽自己的思路和攀登.初三的物理复习课,一直以来都是很多教师的研究课题,笔者也不例外,要在一节复习课上完成复习若干个知识点不难,难的是如何进行教学设计,让题目多、实验少的一节复习课充满生机,让学生不仅     

非线性退缩抛物型方程弱解的梯度的Holder连续性

本文我们讨论如下的非线性退缩抛物型方程：设为上述方程的弱解．在一些结构性条件下，我们得到△ｕ的Ｈ　ｌｄｅｒ连续性．     

Positive solutions for m-point boundary-value problems with one-dimensional p-Laplacian

In this paper, we investigate the existence of positive solutions for a classes of m-point boundary value problems with p-Laplacian. By applying a monotone iterative technique, some sufficient conditions for the existence of twin positive solutions are established.     

Second-order nonlinear singular Sturm-Liouville problems with integral boundary conditions

This paper is concerned with the second-order singular Sturm-Liouville integral boundary value problems

     

A systematic study of (n, 2n) cross sections at 14 MeV

The experimental (n,2n) cross sections around 14 MeV have been collected, analyzed, and evaluated. Data were taken from 124 nuclei for A=19–209 up to the end of 1983. Relation between σn, 2n and (N-Z)/A has been studied. No neutron shell effect is found. The cross sections for some nuclei have been calculated by using a statistical theory. The good agreement with the experimental σn, 2n at 14 MeV has been obtained in terms of a single set of fitting parameters.