氟喹诺酮类抗菌药物与过渡金属离子Cr3+, Mn2+和Fe3+形成配合物配位位置的研究

通过1D ¹H NMR, ¹³C NMR和1H自旋-晶格弛豫时间T₁对氟喹诺酮类抗菌药物与过渡金属离子Cr³⁺, Mn²⁺和Fe³⁺形成配合物的位置进行了研究, 合成了固体配合物对其进行了元素分析. 实验结果表明过渡金属离子Cr³⁺, Mn²⁺和Fe³⁺与氟喹诺酮类抗菌药物形成1∶2的配合物, 并确定了配位位置.     

Correlation between Post-LASIK Starburst Symptom and Ocular Wavefront Aberrations

Monochromatic aberrations in post laser in-situ keratomileusis （LASIK） eyes are measured. The data are categorized into reference group and starburst group according to the visual symptoms. Statistic analysis has been made to find the correlation between the ocular wavefront aberrations and the starburst symptom. The rms aberrations of the 3rd and 4th orders for the starburst group are significantly larger than those for the reference group. The starburst symptom shows a strong correlation with vertical coma, total coma, spherical aberrations. For 3-mm pupil size and 5.8-mm pupil size, the modulation transfer function （MTF） of the starburst group are lower than those of the reference group, but their visual acuities are close. MTF and PSF analyses are made for two groups, and the results are consistent with the statistical analysis, which means the difference between the two groups is mainly due to the third- and fourth-order Zernike aberrations.     

有限时区非线性系统的最优切换控制

This paper proposes a optimal control problem for a general nonlinear systems with finitely many admissible control settings and with costs assigned to switching of controls. With dynamic programming and viscosity solution theory we show that the switching lower-value function is a viscosity solution of the appropriate systems of quasi-variational inequalities(the appropriate generalization of the Hamilton-Jacobi equation in this context) and that the minimal such switching-storage function is equal to the continuous switching lower-value for the game. With the lower value function a optimal switching control is designed for minimizing the cost of running the systems.     

物理实验教学新模式的探索与实践

提出了一种新的物理实验教学模式，论述了建立实验教学模式所遵循的基本原则和基本做法，简要介绍实施新的教学模式所取得的教学成果。     

一般非线性控制系统的最小Hamiltonian实现问题研究

本文给出了一般非线性控制系统的最小Ｈａｍｉｌｔｏｎｉａｎ实现的存在性条件和唯一性结果。     

Cs-He光学碰撞中的非绝热跃迁

激光激发Cs He碰撞复合物,测量了Cs(62P)精细结构布居数分支比,由此证实了发生在光学碰撞中的非绝热跃迁.激光频率从Cs(6P3/2)红翼30cm-1调至蓝翼30cm-1,在6P3/2的近翼,分支比与矢谐量有很大的关系.同时测量了Cs(6PJ)态的精细结构转移截面,截面值σ21=9.8×10-19cm2.     

Resonant Reaction in Rb-Cs Vapour Mixture Rb（5P1/2） ＋ Cs（6P3/2） → Cs（8S1/2）＋Rb（5S1/2）

We experimentally study energy-pooling collision in the Rb-Cs vapour mixture at low densities in a cell. Atoms are excited to Rb（5P1/2） and Cs（6P3/2） states using two single-mode diode lasers. To isolate the heteronuclear contribution in the fluorescence spectrum, a double-modulation technique is adopted. The excited-atom density and spatial distribution are mapped by monitoring the absorption of a counterpropagating single-mode diode laser beam, tuned to Rb（5P1/2 → 7S1/2） and Cs（6Pa/2 → 8S1/2） transitions, respectively, which could be translated parallel to the pump beams. The excited atom densities are combined with the measured fluorescence ratios to determine cross section for the energy-pooling process [i.e. Rb（5P1/2） ＋Cs （6P3/2） → Cs（8S1/2）＋Rb （5S1/2）]. The cross section is 3.79 × 10^-14 cm^2 ± 45%.     

TOCM彩色摄影技术用于大学物理实验的研究

经过多年的发展，采用全光彩色调制器进行彩色摄影的技术已经相当成熟．作为大专院校的学生，有必要了解这一领域的研究成果．为此，开设了TOCM彩色摄影实验，本文介绍了该实验的原理和实验内容．     

用白光信息处理作褪色透明片的彩色复原

本文提供了用白光信息处理技术作褪色透明彩色照片彩色复原的原理和实验,其中之一是由空间编码和彩色滤波两步骤完成的,即将待处理的透明彩色片用空间编码技术编制在一张黑白感光底片上,在白光光学处理系统的傅里叶平面中对这编码的黑白片的频谱进行彩色滤波,最后在系统的输出平面给出彩色增强或复原的图象,另一种是用白光处理技术作褪色透明彩色片的彩色复原实时处理,它可供及时的直接观察并且有操作简便,成本经济和能灵活多用的特点,这两种技术为彩色图象的彩色增强和复原提供了新方法。 关键词：     

密环菌甲素晶体结构研究

密环菌甲素(C₂₄H₃₀O₆)属正交晶系,空间群为P2₁ 2₁ 2₁,晶胞参数为a=18.784(9)?,b=14.002(7)?,c=8.598(5)?,z=4,计算密度D_c=1.216g·cm^-1。使用菲利浦PW-1100四圆衍射仪收集衍射强度。该结构是在MULTAN-78求解失败以后,使用MULTAN-80,在正切修正时选择统 关键词：