立方烷型2-羟甲基-N-邻羟基苯亚甲基苯胺四核镍配合物的合成与晶体结构

The tetranuclear cubane-like complex, [NiL（EtOH）]4·0.5EtOH （1） with tridentate Schiff base ligand （H2L= 2-Hydroxymethyl-N-salicylideneaniline） has been synthesized and its crystal structure and spectroscopic properties have been studied. The complex consists of a tetranuclear （NiO）4 cubane core, of which four nickel（Ⅱ） ions are bridged by μ3-alkoxide group and each nickel（Ⅱ） ion is coordinated to three μ3-alkoxide oxygen atoms, one imino nitrogen atom and one phenoxide oxygen atom from Schiff base ligand, and further ligated by one EtOH molecule, completing a distorted octahedral geometry.     

全反射X射线荧光分析在生物医学中的应用

介绍了利用北京同步辐射实验室的全反射X射线荧光谱仪测量生物细胞样品的可行性.并用此谱仪测量了正常的和受辐照的小白鼠小肠细胞的痕量元素含量,发现K、Ca、Fe等元素含量有明显的提高,Cu元素含量明显降低,Mn元素含量变化不大,Zn元素含量基本稳定,并讨论了其在临床医学上的重要价值.     

正交群Ω3(V)的自同构(V定向)

确定正交群Ω₃(V)和Ω₄(V)(V定向)的自同构,是在美国Pennsylvania召开的代数群抽象同态会议上提出的公开问题之一。本文证明了Ω₃(V)的任一自同构皆具有标准形,即由一个保持正交性的半线性变换所诱导。     

纠缠相干态及其非经典特性

通过引入正交基矢，连续变量形式的纠缠相干态转化成分立形式，然后用concurrence方法计算了纠缠度，同时研究了其非经典效应(压缩效应，反聚束效应).发现纠缠总是伴随着压缩效应和反聚束效应两者之一，并随相应非经典效应的增大而增大. 关键词： 纠缠 非经典效应 concurrence     

高精度准分布式光纤光栅地震检波解调系统的研究

提出了一种利用光纤超荧光光源的线性边带做边缘滤波器进行多点多参量实时测量的地震波信号解调系统.由于光源波长检测灵敏度对解调系统的灵敏度起决定作用,故对光源进行了优化设计,使得光源所用的线性段斜率得到了大幅度提高.所设计的解调系统以光源在吸收峰1530 nm 处的两段斜边将系统分为两个部分,各部分对应4个通道.通过对其中两个通道进行地震检波模拟测量,传感解调系统的两部分静态波长灵敏度分别为887.5 mV/nm和-971.7 mV/nm,应变分辨力分别达到了0.95με和0.86με关键词： 光纤光学 地震检波解调 边沿滤波器 光纤光源     

Manipulating vector solitons with super-sech pulse shapes

Theoretical simulations about manipulating vector solitons with super-sech pulse shapes are conducted based on an optical fiber system. By changing the temporal pulses' parameters when the orthogonally polarized pulses have the same or different input central wavelengths, the output modes in orthogonal directions will demonstrate different properties. When the input orthogonal modes have the same central wavelength, the “2+2” pseudo-high-order vector soliton can be generated when the time delay is changed. While under the condition of different central wavelengths, orthogonal pulses with multiple peaks accompanied with two wavelengths can be achieved through varying the projection angle, time delay or phase difference. Our simulations are helpful to the study of optical soliton dynamics in optical fiber systems.