Soft-template synthesis and optical Properties of Sb2S3 semiconductor quasi-nanospheres

The reverse micelle system composed of four phases of Hexamethylene/Triton-100/n-pentanol/water (containing 1 ml 0.1 M Sb³⁺ or 1 ml 0.1 M S²⁻), which ratio is 28:3:1:1, is prepared. Sb₂S₃ quasi-nanospheres with diameters between 160 and 240 nm are synthesized by above reverse micelle soft-template system. The result shows that the fluorescence peaks have a blue shift about 19 nm when it is excited at 219 nm, and the UV–Vis absorption peaks shift about 453 nm (2.74 eV).     

含全氟烷基香豆素的合成及其结构表征

间位取代苯酚与全氟炔酸酯或三氟乙酰乙酸乙酯在不同条件下反应生成全氟烷基香豆素. 通过对该化合物的¹H NMR、¹³C NMR、¹³C-¹H COSY及IR、MS的分析，归属了各NMR谱线，对相关化合物进行了结构确证，同时对反应机理进行了推测.     

一类最优投资随机控制模型的马氏链算法

现代金融经济中的很多问题可以构建成随机控制模型,而随机控制的求解却存在一定的困难.马氏链算法应该是一种有效的求解随机控制问题的数值方法.本文以Claus Munk的工作为基础,针对一类最优投资模型,具体确定了马氏链的转移矩阵并证明其满足算法收敛条件,并用MATLAB语言编成一个程序实现.     

求全局最优解的新算法

利用局部极大值点与动力系统的稳定奇点的对应性，计算代数方程的根、无约束极大值点、有约束极大值点、非线性规划解、及最小二乘解．我们采用了常微分方程数值解的Euler算法及网格初始点的循序迭代算法，并以具体的例子和程序说明创立的方法具有通用性，同时考虑了一些存在的问题以便在理论和算法上作进一步的改进。     

一氯二茂钛在有机合成中的应用研究

综述了近年来一氯二茂钛在有机合成中的应用研究, 主要涉及环氧化物的还原开环、其它还原反应、Reformatsky反应、呐醇偶联反应、不饱和金属卡宾与自由基的加成反应、制备烯糖化合物的反应、制备C-苷的反应等.     

变系数KdV方程组的精确解

将Jacobi椭圆正弦函数展开法与Jacobi椭圆余弦函数展开法引入到变系数KdV方程组的求解中,得到了三组类周期波解．这些解析解在一定条件下退化为类孤波解．     

基于假彩色的红外双波段图像融合方法

分析了人眼视觉和基于假彩色的NRL方法,并将其扩展应用到中波/长波双波段红外图像融合处理中.该方法以双波段红外图像不同的目标响应特征为基础,对RGB三通道分别赋值融合,给出了仿真实验的结果.利用熵和交叉熵等统计参量对多种融合方法的性能进行了定量的评价和比较,实验结果表明基于假彩色的红外双波段图像融合技术简单有效,有利于实时处理.     

广义KdV方程孤子解的存在参数区

§ 1　IntroductionThe classic Kd V equation has the formut=32gh uux +32 αux +13σuxxx . (1 )Where g,h,α,andσ are physical parameters.After some transformations,various ver-sions of the modified Kd V equation may appear.The Kd V equation is a classic soliton e-quation and is well discussed.Different methods have been created to find the precise orapproximate solitons or solitary waves.The following Kd V equation is the mostcommonone:ut-6 uux +uxxx =0 . (2 )Considering traveling waves an…     

Explicit Analysis of Creating Maximally Entangled State in the Mott Insulator State

We clarify the essence of the method proposed by You (Phys. Rev. Lett. 90 (2004) 030402) to create the maximally entangled atomic N-GHZ state in the Mott insulator state. Based on the time-independent perturbation theory,we find that the validity of the method can be summarized as that the Hamiltonian governing the evolution is approximately equivalent to the type αJx^2 bJx, which is the well known form used to create the maximally entangled state.     

One-pot three-component reaction of C60, amino acid and fluorinated benzaldehyde to C60-pyrrolidine derivatives

A series of fluorinated 2,5-disubstituted C₆₀-pyrrolidine derivatives were synthesized via one-pot three-component reaction of C₆₀, amino acid and fluorinated benzaldehyde under reflux in toluene or microwave irradiation. The cis- and trans-isomers could be isolated by chromatography and fully confirmed by ¹H NMR.