校正空间分块镜复位误差所需的最少自由度的确定

可收展式分块镜共相位成像技术是实现光学系统超大口径、超高分辨率成像的关键技术。分块镜复位误差会引起各子镜之间的共相位误差和整个拼接镜面的面形误差。合理确定校正分块镜复位误差所需的自由度具有非常重要的意义。计算机仿真分析了分块镜的复位误差对拼接镜面面形误差的影响。结果表明,所需的校正自由度的个数不仅与展开机构的复位精度有关,而且与分块镜镜面的几何参数有关。     

稀土、2,2''''-联吡啶、邻氨基苯基苯甲酸配合物合成、光谱表征及荧光性质

2,2'-联吡啶(bipy)、邻氨基苯基苯甲酸(HL)与稀土离子(RE=Tb,Eu,Sm,Nd)合成了固体稀土配合物.用元素分析、摩尔电导、紫外光谱、红外光谱、差热-热重分析和荧光光谱,对配合物的组成进行了确定和表征,并对TbL3和TbL3·bipy·3H2O的荧光性能进行了测试和讨论.TbL3·bipy·3H2O的荧光强度比TbL3的荧光强度强.     

激光二极管反馈干涉的实验观测

利用LabView软件虚拟示波器和信号源,观测了激光二极管反馈干涉实验现象．实验证明反馈回激光二极管的光的入射方向和入射光强以及信号处理电路的带宽,对反馈干涉信号有很大的影响．     

Darboux Transformation for Tzitzeica Equation

We present a Darboux transformation for Tzitzeica equation associated with 3 × 3 matrix spectral problem. The explicit solution of Tzitzeica equation is obtained.     

与HBV X蛋白相互作用的细胞蛋白的筛选及其鉴定

参考GenBank核苷酸序列库中的HBV的核苷酸序列设计合成了一对对应于HBx基因的引物，从原发性肝癌(hepatocellular carcinoma，HCC)患者的血清中提取HBV基因组DNA作为模板，扩增HBx编码区并测定了核苷酸序列．将该编码区克隆到酵母双杂交系统的诱饵蛋白表达载体pGBKT7中，转入酵母细胞AH109，进行表型鉴定．然后通过Mating实验从已制备好用于酵母双杂交系统的肝cDNA表达文库中筛选与HBx相互作用的细胞蛋白，并用体外免疫共沉淀实验进一步验证．研究表明，分离得到的与HBx基因编码的蛋白相互作用的4种新的细胞蛋白，分别是醛缩酶B、C8α亚基、一种丝氨酸蛋白酶Hepsin和一种未知蛋白．     

BOUNDEDNESS OF MAXIMAL SINGULAR INTEGRALS

The authors study the singular integrals under the Hormander condition and the measure not satisfying the doubling condition. At first, if the corresponding singular integral is bounded from L2 to itself, it is proved that the maximal singular integral is bounded from L∞to RBMO except that it is infinite μ-a.e. on Rd. A sufficient condition and a necessary condition such that the maximal singular integral is bounded from L2 to itself are also obtained. There is a small gap between the two conditions.     

The Design for Automation of Pellet-Forming Process in HL-2A Pellet Fueling System

In the ever fusion experiments in SWIP, pellet forming process was carried out through adjusting relative devices by staff member in site, which will make every pellet-forming process slight distinction and will result in pellet difference in shape, size and intensity. In the intervals of HL-2A discharges, staff member have to go site to accomplish the pellet-forming process, this wastes human power and increase the potential danger. So it is necessary to develop a remote control system to perform the pellet-forming process. The control system needs have the features of real-time, reliability and be easy to operate and maintain.     

Approaches to improving critical current density of YBCO superconducting thick films deposited by electrophoresis

The irreversibility field (Hirr) of Y-based superconductor is much higher than that of Bi-based superconductor. Y-based superconductor is capable of maintaining stable electrical currents in high magnetic field and electric field, so it is a better suited mate-rial for electric-current applications. Commonly, the Y-based tapes comprise a YBCO thick film deposited on a flexible substrate, typically with an intermediate buffer layer, and an overcoat of noble metal. In this process, the interm…     

双奇核136La的集体带结构

通过重离子核反应与在束γ谱的实验技术, 对A=130缺中子核区的双奇核¹³⁶La的高自旋态进行了研究, 所用核反应为¹³⁰Te(¹¹B,5n). 实验结果扩展了¹³⁶La的能级纲图, 包括3个集体转动带, 最高自旋态达20h. 对于\uppi h_{11/2}\otimes \upnu h_{11/2}$~带, 观测到了旋称反转与集体回弯现象. 通过系统学比较, 对旋称反转特性进行了讨论. 由推转壳模型的计算指出, 此集体回弯是由一对中子的角动量顺排引起的. 另外两个集体带为具有~$\gamma\approx -60^\circ$~的扁椭形变带, 其可能的组态为: $\uppi h_{11/2}\otimes \upnu g_{7/2}h_{11/2}^2$~与~$\uppi g_{7/2}\otimes\upnu g_{7/2}^2 d_{5/2} h_{11/2}^2$.     

Atomic-scale simulation of nano-grains:structure and diffusion properties

Nanograins are characterized by a typical grain size from lto 100 nm.Mclecular dynamics aimubations have been carried out for the nanograin sphere with the diameters from 1.45 to 10.12 nm.We study the influence of grain size on structure and diffusion properties of the nanograins.The results reveal that as the grain size is reduced,the fraction of grain surface increases significantly,and the surface width is approximately constant；the diffusicn coefficlent is increased sharply,and the relation of the diffusion coefficient and the grain size is close to exponential relation below 10nm.