用主量化学组成研究汝官瓷和钧官瓷的原料来源

将84个清凉寺窑汝官瓷和钧台窑钧官瓷样品进行质子激发X射线荧光分析,得到每个样品胎和釉的7种主量化学组分。将所有样品的7种主量化学组成数据进行散布分析,以确定汝官瓷和钧官瓷原料来源是否相同。从散布分析图可以看出,汝官瓷釉和 钧官瓷釉样品的原料产地和配方明显不同,汝官瓷胎和钧官瓷胎样品的原料产地和成分接近,但有所不同。The seven main chemical components of the body and glaze samples of 84 RuGuan porcelains from Qingliangsi kiln and JunGuan porcelains from Juntai kiln are determined by the proton induced X-ray emission （ PIXE）. Then these data are analyzed by scatter analysis to confirm whether the sources of the raw materials of Ru-Guan porcelain from Qingliangsi kiln and JunGuan porcelain from Juntai kiln are the same or not. The figure of the scatter diagram shows that the sourcing area of the raw material and batch formula of RuGuan porcelain and Jun-Guan porcelain glaze are obviously different and the sources of the raw materials and components of their body samples are close but a bit different.     

我们心目中的楷模

于敏先生是我国核科技事业的卓越指挥者，是为“两弹一星”研制做出突出贡献的科学家。我们认识他并在他指导下工作是在氢弹突破之后的20世纪60年代末，我跟着他参加过几个大项目的理论设计研究工作。在工作中，需要用计算机对设计方案进行物理验证，一个方案需经反复验证，多次修改才能方案定型．通常初步计算结果出来之后，搞物理的找出问题所在，迅速做出修改，并交由计算工作者修改程序，再上机，在理论设计比较成熟的基础上，通过冷实验加以验证，得出结果后再做物理分析，再上机计算，最终由热试验加以检验。这一过程有点像在涌浪波涛间行船，能够最终抵达彼岸需要经历许多困难和曲折。     

Simulation of Helium Behaviour in Titanium Crystals Using Molecular Dynamics

The behaviour of helium in Ti crystals at 300 K has been investigated by means of the molecular dynamics. The study is focused on the influences of He-Ti interaction on the aggregation of helium atoms in the substrate. When a Born-Mayer potential is used to describe the He-Ti interaction, the He atoms are unable to cluster with each other due to the weak bridge barrier that cannot trap the helium atoms, Whereas using a He-Ti potential that is constructed by fitting the ab initio pairwise He-Ti potential, the clustering of He atoms can be observed. The results indicate that suitable He-Ti potential plays an important role in the formation of He clusters in metals. Moreover, it is noted that the shape of the formed He cluster is irregular, and the produced defect prefers to congregating on one side of the He cluster rather than spreading symmetrically around it.     

Block Entanglement in the Single-Hole Hubbard Model

We investigate the distribution of the entanglement of the one-dimensional single-hole Hubbard model （HM） and study the relationship between the entanglement and quantum phase transition in the model. The von Neumann entropy of a block with neighbouring spins L for a single-hole HM is calculated using the densitymatrix renormalization group. The distributions of the entanglement entropy in the ground state, as a function of block length, show a dramatic effect, i.e. effectively decoupling with the centres, no matter how the Coulomb interaction u 〉0 or u 〈0. Contrarily, for the Coulomb interaction u = 0 or close to zero, the entanglement entropy in the single-hole model reaches a saturation value for a certain block size. For a fixed size L = 40, the ground state entanglement entropy measure, as a function of u1 shows a peak corresponding to the critical quantum phase transition.     

Effect of Alumina and Chromium Interlayers on Microstructures and Optical Properties of Thin Ag Films on Glass Substrates

Effects of alumina and chromium interlayers on the microstructure and optical properties of thin Ag films are investigated by using spectrophotometry, x-ray diffraction and AFM. The characteristics of Ag films in Ag/glass, Ag/l2O3/glass and Ag/Cr/glass stacks are analysed. The results indicate that the insertion of an Al2O3 or Cr layer decreases the grains and influences the reflectance of Ag films. The reflectance of the Ag film can be increased by controlling the thickness of alumina interlayer. The stability of Ag films is improved and the adhesion of Ag films on glass substrates is enhanced by alumina as an interlayer.     

荧光法研究牛血清白蛋白与三羟基苯基荧光酮-钼(Ⅵ) 配合物探针的作用机理

用荧光光谱法研究了三羟基苯基荧光酮(TH-PF)-钼(Ⅵ)配合物与牛血清白蛋白的结合反应。探讨了TH-PF-Mo(Ⅵ)配合物对蛋白质内源荧光的猝灭机理,并测定了不同温度下的结合常数,温度为25 ℃时,荧光猝灭法测得该反应的结合常数为K=4.78×104 L·mol-1,温度为40 ℃时,荧光猝灭法测得该反应的结合常数为K=3.72×104 L·mol-1。根据Frster非辐射能量转移理论,确定了给体-受体之间的作用距离和能量转移效率(E=0.314),并根据热力学参数确定了TH-PF-Mo(Ⅵ)配合物与牛血清白蛋白之间的作用力类型,以静电引力为主。     

无催化纳米氧化锌的制备及其光学性质研究

本文采用无催化剂直接蒸发高纯Zn粉,在800℃氧气氛条件下,在Si(111)衬底上生长得到以四角状为主的纳米ZnO(T-ZnO)。T-ZnO纳米线每个角约互成110°,长度约为1.5μm,直径100nm左右;Raman分析表明E2(H)普遍存在于各形态的ZnO;光致发光光谱表明,T-ZnO纳米线的光致发光除了与材料性质有关,还与杂质缺陷有关,蓝绿光带是ZnO的缺陷产生的。     

Global Chaos Synchronization between Two New Different Chaotic Systems via Active Control

We present chaos synchronization between two new different chaotic systems by using active control. The proposed controller ensures that the states of the controlled chaotic response system asymptotically synchronizes the states of the drive system. Numerical simulations are shown to verify the result.     

最有效的相容剂是两嵌段还是多嵌段聚合物？

采用Monte Carlo模拟方法研究了多嵌段聚合物在A／B／嵌段聚合物三组份体系作为相容剂使用的有效性．占总体积19％的A组份在体系中为分散相．模拟结果显示了两嵌段和多嵌段聚合物在界面上的聚集行为,以及如何影响这个不相容体系的相形为．两嵌段聚合物趋于直立在相界面上,而多嵌段聚合物更容易横跨在相界面上并占据较大的界面积．从而导致多嵌段聚合物更有效的阻止体系相分离的发生．     

非挥发性溶质对共沸物沸点的影响

测定了 10种非挥发性溶质对甲醇 -四氢呋喃共沸物沸点的影响 .发现与共沸物平衡的气相组成因非挥发性溶质不同发生了不同的变化 ,但所有非挥发性溶质都引起共沸物沸点升高。运用热力学原理对实验结果进行了讨论 .理论分析及对分析结果的实验检验表明 ,少量非挥发性溶质总引起共沸物沸点升高是一个具有普遍意义的结论