K-非常凸空间

本文引入了一种新的K凸空间K-非常凸空间,及其对偶空间K-非常光滑空间,它们分别是非常凸空间和非常光滑空间的推广但又严格弱于非常凸空间和非常光滑空间,因此它们又有许多独特的性质.本文讨论了它们的一些特性及与其它K凸性和K光滑性的关系,推广了[3]、[6]、[7]、[8]中的一些结果.     

微波吸收法研究Mn,Cu掺杂对ZnS:Mn,Cu光生载流子复合过程的影响

采用微波吸收法，测量了ZnS:Mn,Cu粉末材料受到超短脉冲激光激发后，其光生电子和浅束缚态电子的衰减过程.发现Mn,Cu的浓度对导带电子的寿命有明显的影响，提高掺杂浓度会使光生电子的寿命大大缩短，还研究了掺杂浓度对光致发光强度的影响. 关键词： 发光材料 硫化锌 光电子 微波吸收技术     

走近电离辐射

 提起辐射,人们很自然地联想到手机、电脑的电磁辐射,对电离辐射则比较陌生。其实,这种电磁辐射就是电离辐射的一种。电离辐射还包括电子、质子、中子及较重粒子的粒子源,微波辐射,光辐射,同步辐射等。我们的生活环境中存在着天然电离辐射和人工电离辐射,可以说,电离辐射就在我们身边。电离辐射可以造福于人类,它在工业、医学、农业上有着广泛的应用;电离辐射也可以给人类带来巨大的灾难,特别是核武器和辐射事故的发生。因此,我们对待电离辐射这把双刃剑时,既要充分利用它来造福人类,又要严防它的危害。     

蓝光相变光盘的多层膜结构设计

为了使光盘获得优良的记录／读出性能并能够长期稳定地使用，必须优化设计相变光盘的多层膜结构。采用自行设计的模拟分析相变光盘读出过程设计软件，从光学角度出发模拟计算了蓝光(405nm)相变光盘的膜层结构，研究了多层膜系的反射率和反射率对比度等光学参量与各层膜厚度和槽深的关系。研究得出的最佳多层膜结构为：下介电层／记录层／上介电层／反射层的厚度对于台记录为100nm／10nm／25nm，／60nm，而对于槽记录则为140nm／15nm／30nm，／60nm，槽深为50nm。模拟计算结果对于将来高密度蓝光相变光盘的制备具有一定的指导意义。     

Equivalent Antisymmetry Performance of Three—Dimensional Heterogeneous Anisotropic Composites

Starting from the physical features of materials, heterogeneous anisotropic composites (HAGs) are analysed on the basis of the understanding and applications of its equivalent antisymmetry performance. Moreover, the design parameter is optimized to attain the goal of maximizing the use of materials, which is quite meaningful. The HAG structure is defined as a kind of equivalent structures according to the structure and properties of materials.We apply the mature plate theory and the composite materials laminate theory in analysis of the HAG structure,and in this way a new concept and a new idea are expected.     

半参数方差误差模型的估计

本文综合近邻权函数法及最小二乘法，用两阶段最小二乘估计的方法得到了半参数EV模型中参数的估计量及其强相合性，渐近正态性。同时也得到了非参数函数的估计量及其强相合性，一致强相合性。     

Crystal Structure of Adduct 2-Phenyl-imidazo [ 4,5-f ] 1,10-phenanthroline Methanol

The structure of the title adduct comprises a phenanthroline derivative 2-phenyl-imidazo[4,5-f]1,10-phenanthroline and a methanol.The composition of the crystalline adduct was characterized as C19H12N4.CH3OH.It belongs to orthorhombic system,space group Pna21 with a=1.3693(4)nm,b=2.2988(7)nm,c=0.51338(15)nm,V=1.6160(8)nm^3.Z=4,and final R1=0.0423.wR2=0.1012 .Crystal structure shows that all the 19 carbon atoms and 4 nitrogen atoms are coplanar.The bond length data indicated that a very extensive conjugation system was formed.This conjugation makes the compound being a potentially excellent energy transformer used for luminescent materials.     

Release Behaviour of Shock Loaded LY12 Aluminium Alloy

By making use of a light gas gun, a specially designed target is impacted by the LY12 flyer, and the pressure is taken in the range of 0.6-3 GPa. Based on the stress profiles measured in the buffer materials by manganese gauges, the Hugoniot curve and release curves of LY12 aluminium alloy are obtained. Meanwhile, the release curves from different initial shocked states are described in both the pressure-particle velocity plane and the pressure-specific volume plane.     

二次锂电池正极材料LixNi0.3Co0.7O2的XPS与XRD研究

结果表明，ＬｉｘＮｉ０．３Ｃｏ０．７Ｏ２具有六方晶系Ｒ３＾－ｍ空间群结构。当Ｘ－１，０．３１５时，其晶胞参数分别为ａ＝２．８２６ｎｍ，ｃ＝１４．１３０ｎｍ和ａ＝０．２８０８ｎｍ，ｃ＝１．４２５３ｎｍ；ＭＯ６（Ｍ＝Ｎｉ，Ｃｏ）八面体中Ｍ－Ｏ平均距离分别为０。１９４１ｎｍ和０．１９３３ｎｍ。ＸＰＳ分析结果表明ＬＩｘＮｉ０．３ＣＯ０．７Ｏ２表面存在Ｌｉ２Ｏ，同时探讨了其中过渡金属离子的３ｄ电子结构变化。     

广义{1,3,5}-{1,4,5}自相似集的Lipschitz 等价

讨论广义{1,3,5}-{1,4,5}自相似集D=(r₁D)∪(r₂D+ (1+r₁-r₂-r₃)/2)∪(r₃ D+1-r₃)以及E=(r₁E)∪(r₂E+1-r₂-r₃)∪(r₃E+1-r₃)的Lipschitz等价性, 并证明了D与E为Lipschitz等价当且仅当存在正整数m和n, 使得 r₁^m=r₃ⁿ.