拟协调元的精度分析

利用双参数有限元的框架，证明利用拟协调元方法构造的非协调三角形板元都具有一个非常特殊的性质。即相容误差比插值误差高一阶。这是常规有限元和一般非协调元所不具备的。     

149Gd(b1)和153Dy(b1)超形变带能量的ΔI=2Staggering

粒子一转子模型推广到用于描述A-150区奇A梭超形变核态,首次成功地拟合了¹⁴⁹Gd(b1)和¹⁵³Dy(b1)能量的ΔI=2 Staggering.     

STABLE DOUBLE LR ALGORITHM AND ITS ERROR ANALYSIS

In this paper, the normative matrices and their double LR transformation with origin shifts are defined, and the essential relationship between the double LR transformation of a normative matrix and the QR transformation of the related symmetric tridiagonal matrix is proved. We obtain a stable double LR algorithm for double LR transformation of normative matrices and give the error analysis of our algorithm. The operation number of the stable double LR algorithm for normative matrices is only four sevenths of the rational QR algorithm for reed symmetric tridiagonal matrices.     

Enantioseparation of Dencichine and D-Isomer on L-Cysteine Derivative Phase by Ligand-exchange Chromatography

Dencichine (β-N-oxalyl-L-α, β-diaminopropionic acid, L-ODAP), a nonprotein amino acid, is a haemostatic agent present in important Chinese medicinal herbs such as Panax notoginseng, as well as other Panax species1. It was first isolated from the seeds …     

电热泵用于蔬菜温室供热的经济性分析

现代化蔬菜温室是我国都市农业发展中的一个重要组成部分，目前这类温室的冬季加热均以燃煤方式为主．伴随着越加严重的城市环境污染，温室供热系统也面临着改造问题，需要引入清洁供热方式，热泵供热是其中的一种．本文以上海地区现代化蔬菜温室为研究对象，分析了蔬菜温室中使用电热泵供热的运行成本，并与燃煤供热方式进行了对比．就热泵供热系统在温室中的应用前景及可行性、经济性进行了分析，为热泵在温室供热系统中的应用提供了可参考依据．     

采用二叉树编码的遗传算法实现数据似合

针对采用数值分析方法进行数据似合求解复杂度高、运算最大而精度较低的缺陷，本给出一种基于二叉树编码的遗传算法来进行数据拟合，取得了较好的效果。     

试样研磨对铜合金主要元素分析结果的影响

本文从砂带，研磨方法，试样表现状况三个方面，分析了试样研磨对铜合金主要元素测试结果的影响。     

Experimental Study of Capillary Effect in Porous Silicon Using Micro-Raman Spectroscopy and X-Ray Diffraction

We investigate the capillary effect and the residual stress evolution in the wetting, drying and rewetting stages of porous silicon using x-ray diffraction and micro-Raman spectroscopy. A reversible capillary effect and an irreversible oxidation effect are the driving forces for the residual stress evolution. The lattice expansion of the porous-silicon layer is observed to decrease slightly by x-ray diffraction and the tensile residual stress increases rapidly by micro-Raman spectroscopy, with the change of about 82 MPa for the oxidation effect and the change of 2.78 GPa (enough for cracking) for the capillary effect. Therefore, the capillary effect plays a major role in the residual stress evolution in the stages. A simple microscopic liquid-bridge model is introduced to explain the capillary effect and its reversibility. The capillary emergence has a close relation with a great deal of the micro-pore structure of porous silicon.     

原子物理中时间反演对称性成立吗：原子系统中永久电偶极矩的探查

本文将介绍在基本对称性研究领域具有重要意义但至今尚无答案的一项研究工作──微观粒子永久性电偶极矩的探查．其中重点介绍原子电偶极矩的探查．这一工作的意义在于它是对探索ＣＰ不守恒或Ｔ反演对称性破坏的来源的理论的检验；还在于微观粒子电偶极矩的非零值意味着电磁相互作用中时间反演对称性的破坏．本文将介绍这一工作的研究背景及其重要意义，基本概念，实验原理和方法．