Ar原子偶宇称3p5(2P1/2)nl′ [K′]J (l′=1, 3)自电离Rydberg态共振增强激发光谱

用脉冲直流放电产生Ar原子亚稳态3p⁵4s[3/2]₂和3p⁵4s′[1/2]₀．在单光子32500～35600 cm^-1能量范围内, 结合飞行时间质谱技术获得Ar原子共振增强激发光谱．光谱分析表明,所有谱线来源于Ar原子3p⁵4s[3/2]₂和3p⁵4s′[1/2]₀两个亚稳态吸收单个光子向偶宇称np′、nf′自电离Rydberg态序列的跃迁．实验观测到许多新的自电离能级,并获得更精确和系统的能级位置和量子亏损值数据．     

Fibonacci数列倒数的无穷和

利用初等方法以及取整函数的性质研究了Fibonacci数列三次倒数的求和问题,获得了该和式倒数取整后的确切值,也就是给出了一个包含Fibonacci数列有趣的恒等式.     

CdSe量子点/核壳结构的制备及在敏化太阳能电池中的应用进展

综述了CdSe量子点和核-壳型量子点的制备及其在敏化太阳能电池方面的应用进展.     

求解无容量设施选址问题的拉格朗日蝙蝠算法

无容量设施选址问题(Uncapacitated Facility Location Problem,UFLP)是一类经典的组合优化问题,被证明是一种NP-hard问题,易于描述却难于求解.首先根据UFLP的数学模型及其具体特征,重新设计了蝙蝠算法的操作算子,给出了求解UFLP的蝙蝠算法.其次构建出三种可行化方法,并将其与求解UFLP的蝙蝠算法和拉格朗日松弛算法相结合,设计了求解该问题的拉格朗日蝙蝠算法.最后通过仿真实例和与其他算法进行比较的方式,验证了该混合算法用来求解UFLP的可行性,是解决离散型问题的一种有效方式.     

基于屏蔽数据的部件可靠性指标的贝叶斯估计

基于屏蔽数据,在单元的屏蔽与失效不独立的情形下,研究系统中Burr XII部件可靠性指标的估计问题。在三种不同的损失函数下,推算出部件寿命参数及可靠性指标的贝叶斯估计。最后利用随机模拟对两种估计方法进行比较分析,并讨论屏蔽概率和屏蔽水平对估计结果的影响。     

富勒烯吡咯烷衍生物的应用研究进展

综述了近几年来富勒烯吡咯烷衍生物的应用研究,着重从生物活性、分子磁性和光电材料等几个方面介绍了富勒烯吡咯烷衍生物研究的最新进展。参考文献54篇。     

溶剂调控布洛芬乙烯酯酶促水解的立体选择性的热力学研究

采用高效液相色谱研究了不同溶剂体系中褶皱假丝酵母菌脂肪酶（CRL）催化布洛芬乙烯酯水解反应的立体选择性.研究发现,在单一溶剂体系中Eyring曲线呈线性,在10~50 ℃的实验温度内均呈S选择性;在混合溶剂体系中Eyring曲线呈非线性,且观察到不同的转变温度（T_inv）.研究还发现：在亲水性有机溶剂二氧六环/水均相混合溶剂体系中,Eyring曲线的T_inv处立体选择性E 值为极小值,在疏水性有机溶剂异辛烷/水两相混合溶剂体系中,T_inv处E 值为极大值,而在氯仿/水两相混合溶剂体系中,随着温度的变化,立体选择性发生了反转.     

Correcting the systematic error of the density functional theory calculation: the alternate combination approach of genetic algorithm and neural network

The alternate combinational approach of genetic algorithm and neural network (AGANN) has been presented to correct the systematic error of the density functional theory (DFT) calculation.It treats the DFT as a black box and models the error through external statistical information.As a demonstration,the AGANN method has been applied in the correction of the lattice energies from the DFT calculation for 72 metal halides and hydrides.Through the AGANN correction,the mean absolute value of the relative errors of the calculated lattice energies to the experimental values decreases from 4.93% to 1.20% in the testing set.For comparison,the neural network approach reduces the mean value to 2.56%.And for the common combinational approach of genetic algorithm and neural network,the value drops to 2.15%.The multiple linear regression method almost has no correction effect here.     

Laser spectroscopy of jet－cooled CuF in visible region

The laser-induced fluorescence excitation spectra of jet-cooled CuF have been recorded in the range of 19000－21470cm^{-1}, in which the CuF radicals were produced by the reaction of SF_6 with copper atoms from a dc discharge-sputtering source under supersonic jet conditions. Eight observed vibronic transition bands have been assigned as the transition from the ground state X(^1Σ^+) to B(^1Σ^+), C(^1Π) and an unreported upper state. The rotational structure of all observed bands has been analysed at the estimated rotational temperature 80K. We determined the newly observed band to be the (^1Π, v=1)－X(^1Σ^+v=0) transition according to the character of the rotational structure and the isotopic shift analysis. In addition, the lifetimes of the states involved in these bands were measured.     

基于规则学习的传统纹样统一生成模式研究

传统纹样的生成是图案生成领域最具代表性的研究方向之一，从传统纹样的构图规则出发生成纹样是最常用的方法之一。以传统纹样为研究对象，针对现有传统纹样生成方法泛化能力差的问题，通过对不同传统纹样进行特征分析，找出其生成规则的异同，提出了一种传统纹样统一生成模式：寓意嵌入的层次迭代生成模式。选取几何纹、动物纹、植物纹中的典型纹样，利用统一生成模式进行重构，验证了模式的有效性。实验结果表明，统一生成模式适合多种传统纹样的重构，一定程度上是对传统纹样重构的创新应用。