浙江丽水地区畲族与汉族成人头影测量分析对比研究

目的 比较畲族和汉族成人头影测量标准值的差别，为临床正畸治疗错牙合畸形提供依据。方法 按照准入标准选择浙江丽水地区汉族和畲族成人正常牙合各40 例，均拍摄头颅X线侧位片,采用北京大学口腔医院头影测量分析法进行测量分析。结果 测量结果显示，畲族成人的面角、上下中切牙夹角、Y 轴角以及下颌平面角（MP-FH）和上中切牙突距均较汉族显著增加（P＜0.05 或0.01），而颌凸角及下中切牙突距显著减小（P＜0.01）；畲族女性成人下颌平面角（MP-SN）和面角均较男性成人显著增加（P＜0.05），其他测量指标差异无统计学意义（P＞0.05）。结论 畲族成人较汉族相对是长面型，垂直生长型较多。而畲族男女比较，女性长面型较男性更明显。     

水热污泥与煤在混燃过程中的协同效应特性研究

以城市污泥衍生的水热污泥(SS-derived hydrochar)为对象,结合傅里叶红外光谱分析(FT-IR)、X射线荧光光谱分析(XRF)和X射线衍射分析(XRD)等对比研究了水热污泥与三种不同品阶煤(褐煤、烟煤和无烟煤)在有机/无机结构与燃料特性上的异同;同时,通过热重(TG)与偏差分析(Deviation)考察水热污泥与各阶煤在不同混合比例条件下的协同燃烧行为及其作用机制。结果表明,污泥经过水热处理后其有机结构和燃烧行为均提升至与煤相似的水平,该过程不仅改善污泥的燃烧特性,并增强其与煤之间的协同燃烧效应。水热污泥中适量的轻质组分与(碱)碱土金属能在混合燃烧过程中加速煤的失重速率,其对三种煤的促进作用可达4.4%-16.1%(褐煤)、1.9%-9.4%(烟煤)和4.8%-12.1%(无烟煤)。总体而言,水热污泥与褐煤混合而成的燃料在燃料性能上具有较大的优势,并且其混合比例以30%(水热污泥):70%(褐煤)与50%(水热污泥):50%(褐煤)为宜。     

锂离子电池高电压正极材料LiNiVO4的合成与表征

通过流变相反应法成功合成了LiNiVO4．利用热重-差热分析、粉末X射线衍射、扫描电子显微镜和粒度分析对产物进行了表征;采用循环伏安技术评价了其电化学性能．结果表明,利用流变相反应法在500℃即可制备纯相的LiNiVO4产物．与常规的固相反应产物相比,流变相产物表现出了较小的晶胞常数和颗粒尺寸,其中600℃的流变相产物具有良好的循环伏安特性．     

Population of Unstable Nuclides and Nuclear Temperature Extraction in 46.7MeV/u 12C Induced Reaction

The experiment results of unstable nucliaes decay by using the light charged particle correlation function obtained in ¹²C 46.7MeV/u+⁵⁸Ni experiment are reported.Under the assumption of statistical equilibrium,the nuclear temperatures are extracted,and the influence of the reaction mechanism on the nuclear temperature are also investigated.     

The Effect of the Neutron Skin and the Neutron Distribution Diffusion on Nuclear Potential

The interaction potentials between two heavy ions are calculated by using the energy density formalism and the nuclear Fermi density distributions,the factor of the neutron skin and the surface diffusion of the neutron distribution increasing with the increases of the neutron excess is considered.In this calculation,the experimental fusion barriers are well reproduced,and improved for the intermediate heavier nuclear systems.It is found that the neutron skin and the neutron distribution diffusion can explain the influence of the neutron excess degree of freedom on the proximity scaling.     

Dynamics of Atom-Cavity System: Comparison Between the Kerr and Stark Effects

Taking into account the effects of Stark shift and Kerr medium, the dynamics of a two-level atom interacting with a quantized cavity field and the evolution of the cavity field entropy are investigated in this paper, the comparison between both systems of Stark shift and Kerr medium is given. The results show that, the effects of Stark shift and Kerr medium change the quasiperiod of the atomic inversion and the field entropy evolution.     

碳纳米管的激光溅射产生

碳纳米管的激光溅射产生程大典,余荣清,刘朝阳,张强,王育煌,黄荣彬,詹梦熊,郑兰荪（固体表面物理化学国家重点实验室,厦门大学化学系,厦门,３６１００５）关键词碳纳米管,激光溅射,碳球Ｓｍａｌｌｅｙ等［１］曾以脉冲激光束在超声分子束喷口的喉道处蒸发石墨...     

Synthesis and Electro-optical Conducting Properties of Disperse Red 1 Functionlized Polymethylphenylsilane

Polymethylphenylsilane (PMPS) was modified by chloromethylation then condensed with Na salt of Disperse Red 1(DR1). The product, DR1 functionlized PMPS(PMPS-DRD, was thoroughly washed until it had no DRl or other dopant. Its glass transition temperature is 155℃, contains 4.5% weight of DRl residue. The UV-Vis spectrum of PMPS-DRl shows a broad ab-sorption band in the range 400-700 nm. Photoconductivity measured on a 2 μm film made of PMPS-DR1, using a 632.8 nm He-Ne laser beam, shows that it is electric field dependent and in the range of 10^-13 to 10^-11S/cm. The electro-optical coefficient of PMPS-DRl was measured as a value of r₃₃=0.8 pm/V.     

片状卤化银晶体的制备、结构与性能的研究——Ⅲ.碘离子分布对片状卤化银晶体光电性能的影响

本文制备了一系列结构不同的片状卤化银晶体,用扫描透射电子显微镜和X射线能谱仪相结合的方法对单个微晶进行了亚显微结构分析。半定量地测定了碘离子在不同结构的片状晶体中的分布,同时测量了各样品相应的介电损耗、Dember效应的光电压及高低照互易律失效。结果表明,在四种碘离子分布不同的片状卤化银晶体中,其微晶的离子电导率、高低照互易律失效、Dember效应的光电压衰减都随微晶中碘离子的分布不同而异,而且与乳剂的感光性能有很好的对应关系。     

红条毛肤石鳖齿舌的磁性研究

研究了红条毛肤石鳖（Acanthochton rubrolinestus LISCHKE)齿舌的磁性及其中磁性粒子的结构,并且讨论了磁性粒子在齿舌中生成的取向性和磁晶各向异性. 关键词：