1,3,5-三芳基-2-吡唑啉化合物光物理行为的研究

合成了一组带不同取代基的三芳基吡唑啉化合物,对它们在不同极性溶剂中的光物理行为(如荧光量子产率,荧光寿命等)进行了测定指出:这类化合物在光的激发下除存在有分子内共轭条件下的电荷转移行为外,还存在着分子内非共轭条件下的电子转移,本工作还以三芳基吡唑啉化合物为猝灭剂对氧鎓盐的荧光猝灭能力进行了研究,并对所得结果作了讨论。     

2,9,16,23-四-[4-二甲氨基苯氧基]锌酞菁的合成和分子内光致电荷转移反应的研究

光敏电荷转移是近年来十分活跃的研究领域,人们设计了各种电子给体和电子受体用共价键相连结的化合物,如:卟啉电子给体,醌^[1]、硝基苯、甲基紫精作为电子受体,模拟自然界的光合作用。     

2-吡唑啉类化合物光物理行为的研究──分子内两种电荷转移机制的竞争

近年来,1,3,5-三芳基-2-吡唑啉类化合物的光物理及光化学问题研究引起了广泛兴趣^[1,2],这是由于2-吡唑啉化合物不仅是一种良好的荧光增白剂,在纺织工业中得到普遍应用,而且还是一种可在静电复印中应用的良好光导材料^[3,4].     

基于形变晶粒增殖过程的弹塑性本构模型*

本文根据多晶金属变形的细观过程特征,将形变晶粒分为三类.提出塑性形变晶粒增殖的概念,并由此导出较为简洁的弹塑性本构关系.能对若干实验结果给出合理的解释.表明材料的宏观屈服、率相关和加工硬化等现象与形变晶粒演化的动力学过程密切相关.     

Fixed point theorems in probabilistic inner product spaces

The purpose of this paper is to introduce a new maditying detinition for probabilistie inner product space, and to establish seveeral new fixed point theorems for mappings on such kind of spaces, As an example of applications. we utilize the results of this paper to study the existence and uniqueness of solution of Uryson’s integral equation in IV.     

ARMA-GARCH模型对上海铜期货市场收益率的建模与分析

本文首先对沪铜期货收益率序列的进行了分析,在单位根检验中克服了观察等价性的影响,并得到为该收益率服从ARIMA（0,1,1）-GARCH（1,1）模型.在此基础上,利用TARCH和EGARCH模型对收益率的杠杆效应进行了检验.     

A Novel Porphyrin-Labeled Poly(N-Isopropylacrylamide): Spectral and Luminescent Properties

A novel water-soluble tetraarylporphyrin-containing polymer has been synthesized by the reaction of bromoalkyl-containing poly(N-isopropylacrylamide) with 5-(4-pyridyl)-10,15,20-tri(4-methoxyphenyl)porphyrin. Some physicochemical properties of the obtained polymers are reported. It has been shown that a strong interaction between the porphyrin units takes place in liquid aqueous medium at temperatures below the lower critical solution temperature (LCST). This phenomenon results in considerable broadening of the Soret band in the absorption spectrum and in strong quenching of fluorescence. Higher than LCST fluorescence enhancement is observed.     

端部受斜冲击的刚塑性悬臂梁的双铰模型

斜冲击载荷作用在刚塑性悬臂梁的端部,引起作用在梁横截面处的弯矩以及轴力;在发生塑性变形截面处,弯矩及轴力满足交互作用屈服条件。广义应力在移行铰的邻域不违背屈服条件,屈服函数可在移行铰的背面取极大值,移行铰处的剪切力不必为零。如果悬臂梁足够长,在响应的初始阶段移行铰处非零的剪力会在梁上引起多铰变形。通过对双铰模型与单铰模型的比较发现,双铰模型计算的结果与单铰模型计算的结果很接近,单铰模型作为一个近似模型具有一定的合理性。     

Computer simulation of proton channelling in silicon

The channelling of 3 MeV protons in the 〈110〉 direction of silicon has been simulated using Vineyard model taking into account thermally vibrating nuclei and energy loss due to ion-electron interactions. A beam made up of constant energy particles but with spatial divergence has been simulated for the purpose. The values of the minimum scattering yield and half width of the channelling dip are shown to be depth sensitive and agree well with the measured values. The dependence of yield on the angle of incidence has been found to give information of all three types of channelling. The critical angles for the three types of channelling and wavelength of planar oscillations are consistent with the previous calculations.     

失效准则在广义Mohr空间的表示及应用

在广义的Mohr空间研究材料的破坏和屈服(失效),找到了主应力空间和广义Mohr空 间中失效曲面的变换,以及适用于所有失效准则的应力和失效面法向的普适相容关系. 对于 双剪强度理论,根据它在广义Mohr空间的表示,将之归于最大偏应力理论一类.