衬底温度和退火处理对类金刚石非晶碳膜光电发射谱的影响

在硅衬底下,用等离子辉光放电的方法制备了一组衬底温度为20℃、100℃、200℃和280℃的样品。在光电子能谱仪中测量了它们在HeⅠ(21.2eV)激发下的UPS谱。此外还测量了衬底为常温的样品在退火温度为200℃、350℃、500℃、700℃和800℃时的UPS谱。实验结果表明,衬底温度在200℃至280℃时,金刚石成分略有增加,当退火温度低于350℃时,金刚石成分有所增加,但高于350℃后,迅速向石墨方向转化。本文对实验结果进行了讨论,认为氢在其中起了重要作用。     

非均匀磁场中键稀疏和各向异性的三链伊辛(Ising)带的磁性质

本文在有效场理论的框架内,讨论了健稀疏和各向异性三条链伊辛(Ising)带在非均匀磁场中的平均磁化对于磁场强度、键浓度以及各向异性交换作用的依赖关系。     

梁式结构非线性有限元分析及其在微型机上的实现

本文讨论梁式结构几何非性静力分析的有限元方法,推导了空间梁大位移切线刚度矩阵,研究了在微型机上实施的方法。为了提高计算效率,采取了分别管理单元线性刚度阵及非线性刚度阵、一次形成线性总刚度阵而多次修改总刚度阵、按内存资源自动分块法修改总刚度阵的策略。节省了计算时间及内存资源,从而在微型机上实现了结构非线性分析。在IBM-PC-XT、机上编制了结构非线性静力分析有限元程序NONDJ-W。给出了对梁、平面柔性刚架、空间柔性刚架的计算实例。有解析近似解的算例表明用有限元的计算结果具有一定的精确度。     

High Q Characteristics of the Helical Resonance Polycavity and its Coupling Field

In the 30~(MHZ)-1000~(MHZ) frequency band, the oscillator or filter is constructed by high Q screw resonatores. However, we can convennient ly expand or compress the frequency band. In fact, it is impossible to make UHF, VHF oscillators or a filter with the crystal resonatores or composite paramenter devices, in the frequency board within the VHF higher end and UHF band. So it is most important to study the screw resonator for the design of the duplexing technology on the satellite, frequency multiplier, oscillator or polycavity screw filter.This article deals with the monocavity field distrubution, chromatic dispersion charactor and polycavity mutual inductance help each other and has made apractic film of the experiment.     

Hydrogen Bonding in Hydrogenated Amorphous Germanium

Thin films of hydrogenated amorphous germanium (a-Ge:H) were prepared by radio frequency glow discharge deposition at various substrate temperatures. The hydrogen distribution and bonding structure in a-Ge:H were discussed based on infrared absorption data. The correlation between infrared absorption spectra and hydrogen effusion measurements was used to determine the proportionality constant for each vibration mode of the Ge-H bonds. The results reveal that the bending mode appearing at 835 cm^-1 is associated with the Ge-H2 (dihydride) groups on the internal surfaces of voids. While 1880 cm^-1 is assigned to vibrations of Ge-H (monohydride) groups in the bulk, the 2000 cm^-1 stretching mode is attributed to Ge-H and Ge-H2 bonds located on the surfaces of voids. For films associated with bending modes in the infrared spectra, the proportionality constant values of the stretching modes near 1880 and 2000 cm^-1 are found to be lower than those of films which had no correspondina bending modes.     

论有限序列的组织复杂性

通过分析关联谱的分布特征,提出了一种组织复杂性的定义。关联谱是序列各阶信息剩余度的Fourier变换,对于长度为N,Shannon熵为H的序列。当N很大时,其最大组织复杂性趋于NH。周期序列的复杂性为O(logN)。所以本文提出的复杂性度量可能能够回答“Bach的音乐为什么比猴子的音乐复杂?”的问题。     

J/Ψ和Υ家族的轻子衰变和辐射跃迁宽度

从伸缩子-胶子有效耦合理论得到的重夸克势(Dilaton)势出发，计算了重介子的轻子衰变和辐射跃迁宽度，并与Cornell势所得到的相应结果作了比较．结果表明，Dilaton势的计算结果比Cornell势的相应结果更好地符合实验数据．     

PT-28对常见无机酸和有机酸的萃取行为研究

系统地研究了2－乙基己氧基甲基磷酸二（2－乙基己基）酯（代号PT－28）对硫酸、磷酸、硝酸、高氯酸、盐酸和醋酸六种酸的萃取行为，发现PT－28对硫酸、磷酸、盐酸和醋酸均不萃取，只对硝酸和醋酸萃取，这与中性磷氧萃取剂甲基膦酸二甲庚酯（P350）和磷酸三正丁酯（TBP）对强酸的萃取有显著的不同，并对其萃取机理进行了讨论。     

Michaelis-Menten模型近似回归方法的改进

对在生命科学中广泛应用的Michaelis-Menten模型，人们通常采用Y=1/Y代换，然后用最小二乘法求出近似回归模型，该近似回归模型对原始数据的测量误差较敏感，严重时会使模型无实用价值，通过对该现象的分析，找出了导致模型失败的原因，给出了一个解决问题的简单实用的方法。     

重介子谱的真空色屏蔽效应

在重夸克势模型理论框架下，研究了重介子谱的色屏蔽效应，结果表明，具有真空色屏蔽效应的重夸克势对重介子的实验能谱给出了更好的理论解释。