Dissipation-Managed Bright Soliton in a 1D Bose-Einstein Condensate in an Optical-Lattice Potential

We study the formation of a dynamically-stabilized dissipation-managed bright soliton in a quasi-onedimensional Bose-Einstein condensate by including an imaginary three-body recombination loss term and an imaginary linear feeding one in the Gross Pitaevskii equation, trapped in a shallow optical-lattice potential. Based on the direct approach of perturbation theory for the nonlinear Schroedinger equation, we demonstrate that the height （as well as width） of bright soliton may have little change through selecting experimental parameters.     

Interactions between Components of Various Vector Solitons in Bose-Einstein Condensates

We investigate the interactions between components of various vector solitons in Bos-Einstein condensates by means of the least action principle, and derive the effective potentials for different vector solitons, which indicate that the interactions are of short range, and may be repulsive or attractive decided by the different intra- and inter-species interactions in such a system. In the case of attraction, the two solitons will oscillate about and pass through each other around the equilibrium state. The comparison of analytical results with mumertical simulation is presented.     

中频对向靶磁控溅射制备超薄ZnO薄膜及其在太阳电池中的应用

中频溅射制备ZnO薄膜可改善射频磁控溅射方式中沉积速率过慢的缺点.对于多层薄膜的制备,对向靶的设计可使样品避开等离子体直接轰击,减少基底薄膜的损伤.本文采用这项技术制备厚度约为50nm的ZnO薄膜,通过调整工作压强、溅射功率、氧氩比等工艺条件,制备出均匀致密,结晶质量高,电阻率在102～103Ω·cm之间,可见光区透过率达到90;的ZnO薄膜.将其应用到CIGS太阳电池中发现,具有50nm厚度的ZnO层的CIGS太阳电池的性能较无ZnO层的太阳电池都有了很大提高.     

3,5—二溴—4—氨基苯基苯光酮荧光熄灭法测定微量锆的研究

本文研究在阳离子表面活性剂ＣＴＭＡＢ存在下,３,５－二溴－４－氨基苯基荧光酮（ＤＢＡＰＦ）与锆形成络合物荧光熄灭法测定微量锆的实验条件。试验了１０多种离子的干扰情况,并应用于分析组合中微量锆的测定,结果满意。     

钼酸铵分光光度法测定水质中总磷时砷的干扰消除研究

采用单一影响因素和正交因素水平研究相结合,试验不同形态砷对钼酸铵分光光度法测磷过程的干扰、干扰的主要因素、硫代硫酸钠最佳加入量及最佳显色时间.结果表明不同形态砷的干扰强度依次是,五价砷[As(V)]大于三价砷[As(Ⅲ)],而三价砷[As(Ⅲ)]又远远大于二甲基砷[DMAA].当As(V)浓度小于2.0 mg/L时,显色时间为测定的主要影响因素;当As(V)的浓度为0.1～5.0 mg/L时,考虑到操作以及实际水样中As(V)的含量等因素,选择硫代硫酸钠0.5 mL(40 mg/mL)为最佳量1,5 min为最佳显色时间。     

洛美沙星在胶束体系中的荧光特性研究及应用

研究了洛美沙星在胶束中的荧光特性,发现十二烷基磺酸钠(SDS)对洛美沙星的荧光有较强的增敏作用。据此,提出了胶束增敏荧光光谱法测定痕量洛美沙星的新方法,洛美沙星含量在0.04~4μg/mL范围内与其荧光强度线性关系良好,相关系数r=0.9995。方法的平均回收率为96.2%~100.8%。     

Structural Elucidation and HPLC Analysis of Six Flavone Glycosides from Artemisia frigida Willd.

An investigation of the EtOAc-soluble fraction from the aerial parts of Artemisia frigida Willd.(A. frigida) led to the isolation of three new flavonoid glycosides together with three known compounds. Their structures were elucidated by spectral experiments. At the same time, high-performance liquid chromatographic(HPLC) method was used for the simultaneous determination of the six flavonoid glycosides from the aerial parts of A. frigida. The separation by gradient elution was performed on a Hypersil ODS-2 column(250 mm×4.6 mm, 5 μm) at 30 ℃ with acetonitrile and water as the mobile phase, and monitored by absorbance at 276 nm. The parameters of linearity, precision, accuracy and specificity of the method were evaluated. The recovery of the method is 96.50%―98.01%, and linearity(r>0.9992) was obtained for all the flavonoid glycosides. A high degree of specificity as well as repeatability and reproducibility(relative standard deviation values less than 2.0%) were also achieved. This assay was applied to the determination of six flavonoid glycosides in ten samples. The results indicate that the developed assay method was rapid, accurate, reliable and could be readily utilized as a quantitative analysis method for A. frigida.     

三峡水库回水末端浮游藻类分布特征及其与DOM荧光特性的相关性研究

为了研究三峡水库库尾水域中浮游藻类的群落结构、组成、分布及其在水库水位定期涨落影响及变化规律,尤其是浮游藻类对库区水质状况的影响机理,选择了三峡水库回水区末端,即重庆朝天门至下游太洪岗约50 km水域的6个代表性的断面,在库区水位由最高蓄水水位稍落的开始阶段,即水华的敏感期2012年3月、4月、5月,采集各个断面水体中的水样,获得了三峡水库末端回水区域浮游藻类的种类、组成及其分布特征的初步信息,并将其与同时段水体的水质参数和溶解有机质(DOM)的三维荧光光谱（EEM）特性的进行了相关性拟合研究。研究结果表明,三峡水库水华敏感期,其回水末端优势藻有属蓝藻门的蓝纤维藻、属绿藻门的小球藻、属硅藻门的直链藻和舟形藻,藻密度分别在0.40～0.56×106,1.9～0.8×106,0.36～0.25×106,0.42～0.15×106 cells·L-1;此外在少数断面鱼腥藻、席藻、刚毛藻、羽纹藻和卵形藻,优势藻密度的变化规律与DOM中类蛋白质荧光峰强度、呈显著相关。为便捷检测水华提供有益参考。     

Mo(Ⅵ)-邻硝基苯基荧光酮配合物光谱探针测定蛋白质

研究了Mo(Ⅵ)-邻硝基苯基荧光酮(o-NPF)配合物与蛋白质的相互作用及光谱性质. 提出了以Mo(Ⅵ)-邻硝基苯基荧光酮配合物作为光谱探针测定微量蛋白质的方法. 结果表明, 在pH为2.2的 HAc-NaAc缓冲介质中, 乳化剂OP存在下, o-NPF-Mo(Ⅵ)在40 ℃加热10 min后与蛋白质形成稳定的复合物, 最大吸收波长红移至587 nm. 蛋白质质量浓度在0～10 mg/L 范围内符合比尔定律, 复合物的表观摩尔吸光系数为3.53×106 L·mol-1·cm-1. 该方法具有很高的灵敏度和选择性, 可直接用于人尿、新生牛血清中蛋白质的测定, 回收率分别为93%和99%.     

与正弦函数有关的星形函数逆的Toeplitz行列式

Let S*s be the class of normalized functions f defined in the open unit U = {z ∈ C:丨z丨 ＜ 1} such that the quantity zf'(z)/f(z)lies in an eight-shaped region in ...