Na原子斯塔克态寿命的实验测定

在１２５０￣２０００Ｖ／ｃｍ的静电场变化范围内，用可调谐激发实现Ｎａ原子在ｎ＝１７，ｍ＝０斯塔克族各能态布局，采用延迟脉冲场电离方法测量了各斯塔克能态在不同外电场下的寿命，讨论了外电场强度和环境黑体辐射对斯塔克态寿命的影响。     

玉米麸质锌对Cr（Ⅵ）的吸附作用

本文研究了玉米麸质锌对Cr(Ⅵ)负离子的吸附能力。结果表明,玉米麸质锌对Cr(Ⅵ)负离子有很好的吸附作用。在从酸性到碱性的很大范围内,都有很高的吸附率。当流速为4ml·min~(-1)时,吸附率达99.9％。饱和吸附容量是21mg·g~(-1)。用20％NaCl溶液可再生。本研究为玉米麸质锌的应用提供了基础数据。     

光折变晶体中双光束反向传输引起非稳

实验研究了光折变晶体中双光束反向传输引起非稳的时空特性，从实时信号的功率谱分析和相关维数的计算，确证了系统由准周期运动经周期三到达混沌。     

改进的多目标规划遗传算法

本讨论了[1]中多目标规划遗传算法存在的缺陷，并提出了相应改进策略．这些策略包括：引进精粹策略，杂交限制，终止条件，个体表示改进等方面，利用这些策略使算法能克服终止准则和小生境聚集的缺陷，使得算法能更快的收敛到Pareto最优解集同时又有好有分布的Pareto最优解集．     

Efficient synthesis of polysubstituted isochromanones via a novel photochemical rearrangement

A novel and convenient approach to the synthesis of polysubstituted isochromanones is described. Irradiation of 2-formyl phenylalkeno-derivatives with UV light in benzene solution afforded the corresponding products in up to 98% yield. The possible reaction mechanism is proposed and further supported by the isotopic experiments.     

Formation of nitric oxide and nitrous oxide in electron-irradiated H(2)18O/N2 ice mixtures--evidence for the existence of free oxygen atoms in interstellar and solar system analog ices

We investigated the irradiation of low temperature H(2)(18)O/N(2) ice mixtures with energetic electrons in an ultrahigh vacuum chamber. The newly formed species, such as nitric oxide (N(18)O), nitrous oxide (NN(18)O), hydrogen peroxide (H(2)(18)O(2)) and hydrazine (N(2)H(4)), were identified in the experiments with infrared absorption spectroscopy and mass spectrometry. The results suggest that the unimolecular decomposition of water molecules within water ices at 10 K can lead to the formation of transient, suprathermal oxygen atoms. These oxygen atoms may play an important role in the formation of oxygen-containing biomolecules such as amino acids and sugar, as well as the decomposition of the biomolecules in the ices.     

水滑石无机阴离子交换剂的合成与表征

采用水热法制成了镁铝碳酸盐型、镁铝硝酸盐型、镁铝盐酸盐型、镁铝羟基型等插层镁铝类水滑石,比较了层间含不同阴离子类水滑石的结构差异和高温热处理后的结构稳定性.通过离子交换方式以镁铝羟基型为基材插层组装无机阴离子基团MoO42-、WO42-、CO32-和NO3-制得不同的阴离子插层类水滑石.通过XRD、TEM、XPS和热分析方法对镁铝类水滑石和阴离子插层类水滑石进行了表征.     

A uniform estimate for rough paths

It is well known that for two p  -rough paths, if their first ⌊p⌋$\lfloor p\rfloor$ levels of iterated integrals are close in p  -variation sense, then all levels of their iterated integrals are close. In this paper, we prove that a similar result holds for the paths provided the first ⌊p⌋$\lfloor p\rfloor$ terms are close in a ‘uniform’ sense. The estimate is explicit, dimension free, and only involves the p  -variation of two paths and the ‘uniform’ distance between the first ⌊p⌋$\lfloor p\rfloor$ terms. Applications include estimation of the difference of the signatures of two uniformly close paths (Lyons and Xu, 2011 [6]), and convergence rates for Gaussian rough paths (Riedel and Xu, 2012 [7]).     

多芯光子晶体光纤高功率超连续谱光源

分析基于单芯光子晶体光纤的超连续谱光源在提升平均输出功率时所面临的问题,指出采用多芯光子晶体光纤作为超连续谱产生介质是一种实现高功率超连续谱产生的潜在方案。使用自制皮秒光纤激光器泵浦一段国产多芯光子晶体光纤,实现了光谱范围750~1700 nm,平均功率42.3 W的全光纤化高功率超连续谱输出。     

刺激响应性共聚物修饰金纳米棒的制备及其抗肿瘤性能

以1-叔丁氧基羰基-2-丙烯酰肼(Boc-AH)、N-(3,4-二羟基苯乙基)丙烯酰胺(DA)和聚乙二醇甲醚丙烯酸酯(mPEGA)为单体,利用可逆加成-断裂链转移聚合法制备了嵌段共聚物聚丙烯酰肼-聚N-(3,4-二羟基苯乙基)丙烯酰胺-聚单甲氧基聚乙二醇丙烯酸酯(PAH-b-PAD-b-PmPEGA,缩写为HDP),该...