四角场S=2离子ZFS高阶微扰公式的收敛性

本文以~５Ｂ＿２为基态，在强场图象下用微扰理论推导出了轴向零场分裂参量Ｄ的１到４阶微扰计算公式（~５Ｄ近似），并就公式的微扰收敛性进行了系统的讨论．通过计算和分析表明，当第一激发态靠近基态使得其能量与旋轨耦合常数ζ可比拟时．微扰公式是发散的．这时，微扰近似方法将不再有效。但在大多数情况下，公式保持有较好的收敛性．同时，给出了使微扰松式有效的晶场参量Ｄ＿９、δ和μ的近似取值范围，为~５Ｄ近似公式的应用提供了有价值的参考。     

ON DIRECT METHOD OF SOLUTION FOR A CLASS OF SINGULAR INTEGRAL EQUATIONS

In this article, by introducing characteristic singular integral operator and associate singular integral equations (SIEs), the authors discuss the direct method of solution for a class of singular integral equations with certain analytic inputs. They obtain both the conditions of solvability and the solutions in closed form. It is noteworthy that the method is different from the classical one that is due to Lu.     

地震参数综合处理方法在储层横向预测中的应用

建立了一套计算机上可实现的地震参数综合研究的算法和程序,将地震参数综合处理方法变为计算机处理过程,再将地球物理数据转换为地质解释语言.从现有的模式识别或统计分析方法中,选用了输出能量最大准则滤波的综合参数法和标准样本学习的判别分析法进行储层岩性预测.尽管综合参数或判别函数本身已失去了各个参数原有的明确的物理意义,但它却代表了多参数共同性的变化,较可靠地反映出产生这些变化的地质因素.     

山西高校高水平田径运动员竞赛焦虑的研究

通过调查研究，结果表明山西省高校高水平田径运动员竞赛焦虑品质与焦虑状态女子均高于男子；运动项目不同，运动员产生赛前焦虑也不同；并且随着比赛赛次的进展，焦虑程度也随之增高；高水平田径运动员适宜的焦虑区域为32-50之间。     

Operator Matrix Forms of Positive Operators

If a 3-tuple (A:H1→H1,B:H2→H1,C:H2→H2）of operators on Hibert spaces is given,we proved that the operator ～↑A:=(↑A ↓B^*↑B ↓C) on H=H1 H2 is ≥0 is and only if A≥0,R(B)∪→R（A^1/2) and C≥B^* A^ b,where A^ is the generalized inverse of A.In general,A^ is a closed operator,but since R(B)∪→R(A^1/2,B^* A^ B is bounded yet.     

断裂带中岩石硅化的微束研究

断裂带中岩石的硅化现象,通常称之为硅化岩或硅化破碎带,即经动力变质作用的断层岩,通过微束技术对其观察,它们显示出下列特征:在扫描电镜(SEM)下,硅化物质表现为细脉状,而在偏光里微镜下则表现为浸染状;对硅化岩进行组构观察,可见压扁 S 面和剪切 S 面;在透射电镜(TEM)下,可进一步区别不同的位错现象;断裂带岩石的硅化现象是受组成岩石的化学元素的构造地球化学作用所制约的,包括动力分异和化学亲和作用,动热变质作用和退化变质作用,氧化和还原作用以及脱水和水解作用。     

激光辐照Fe81.5P18.4Yb0.1非晶合金的晶化特征

本文用扫描电镜（ＳＥＭ）和示差扫描量热法（ＤＳＣ）研究了ＸｅＣｌ准分子激光辐照Ｆｅ＿（８１．５）Ｐ＿（１８．４）Ｙｂ＿（０．１）非晶合金的晶化特征。结果发现，辐照样品的断面上有类冲击波纹样的层状规则的晶粒分布，其晶粒尺寸由辐照表面向样品内部逐渐减小，最后是近纳米尺度的微晶排布，样品的热稳定性也明显改善。     

时间词义赋值的个别差异的初步研究

运用模糊统计对１０个持续时间词进行了初步研究，然后选出其中２个，让不同个性特征的男女被试对其赋值。结果表明：在时间词的估计值和估值范围上，Ａ型行为类型者的赋值都小于Ｂ型行为类型者；低焦虑者的时间词的估值范围大于高焦虑者；在赋值特征上性别差异不显著．     

Dialdehyde starch‐crosslinked chitosan films and their antimicrobial effects

For improved mechanical and water‐swelling properties of chitosan films, a series of transparent films were prepared with dialdehyde starch as a crosslinking agent. Fourier transform infrared and X‐ray analysis results demonstrated that the formation of Schiff's base disturbed the crystallization of chitosan. The mechanical properties and water‐swelling properties of the films were significantly improved. The best values of the tensile strength and breaking elongation were 113.1 MPa and 27.0%, respectively, when the dialdehyde starch content was 5%. All the crosslinked films still retained obvious antimicrobial effects toward S. aureus and E. coli, and they showed potential for biomedical applications. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 993–997, 2003     

Difference in micellar properties of sodium dodecyl sulfonate from sodium 4-decyl naphthalene sulfonate in D2O solution studied by 1H NMR relaxation and 2D NOESY

¹H chemical shift changes of sodium 4-decyl naphthalene sulfonate (SDNS) at 313 K show that its critical micellar concentration lies between 0.82 and 0.92 mmol/dm³, which is in the same range as that of the previous study at 298 K. The spin–lattice relaxation time, spin–spin relaxation time and two-dimensional nuclear Overhauser enhancement spectroscopy experiments give information about the structure of the SDNS micelle and the dynamics of the molecules in the micelle. The size of the SDNS micelle remains almost unchanged in the temperature range from 298 to 313 K as deduced by analyzing the self-diffusion coefficient. Special arrangement of the naphthyl rings of SDNS in the micelles affects the packing of these hydrophobic chains. The methylene groups of the alkyl chain nearest the naphthalene groups penetrate into the aromatic region, which results in a more tightly packed hydrophobic micellar core than that of sodium dodecyl sulfonate.