埋入SiO2薄膜中的Ge,Si和C团的电学性质

研究了埋入ＳｉＯ２薄膜中的Ｇｅ，Ｓｉ，Ｃ微晶的电学性质与温度的关系。结合对光致发光（ＰＬ）的测量、电导激活能、电导与发光强度和峰位关系的测量发现，当测量温度高于６０℃时，埋入ＳｉＯ２中的Ｇｅ，Ｓｉ，Ｃ微结构具有半导体导电规律，尽管Ｃ／ＳｉＯ２复合膜在室温至６０℃之间表现出金属导电性质。对电导和ＰＬ机制进行了讨论。     

温度回路-小孔脉管制冷中的新现象

一台可工作在双向进气模式和小孔模式下的单级脉管制冷机,当双向进气方式采用并联双阀双向进气时,最低制冷温度为19.3K,50K以下的制冷量变化约为2W/K;当双向进气阀门关闭时,制冷机就工作在小孔模式下,最近的研究工作发现,当制冷机工作在小孔模式下时出现了一个新的现象-脉管冷端温度存在温度回路,该特点与脉管冷端的热负荷及小孔开度的调节方法有关,该现象的发现对于理解双向进气模式下温度不稳定问题提供了一个新的思路。     

原子吸收光谱仪七种元素吸收谱图的研究

原子吸收光谱分析法具有许多优越性，但其线性范围较窄。各元素的线性浓度范围，国内外仪器厂及有关专著均未给出，这给我们的分析工作带来诸多不利。为此，作者对7种元素的原子吸收谱图进行了分析研究，分别找出了7种元素在4种仪器工作条件下的浓度线性区。对减少样品前处理过程中的盲目性以及提高分析数据的准确性具有重要意义。     

具多个非线性反馈项的一般Lurie控制系统的绝对稳定性

本文研究了具多个非线性反馈项的一般Lurie控制系统的绝对稳定性问题,由Lyapunov函数方法,得出了绝对稳定的新的充分必要条件和一些实用的充分条件,这些条件推广了集合稳定性.一个数值例子说明了本文结果的有效性.     

Systematic Study on Alpha Decay Half-Lives of Superheavy Nuclei

The α-decay half-lives of a set of superheavy nuclear isotope chain from Z = 105 to 120 have been analyzed systematically within the WKB method, and some nuclear structure features are found. The decay barriers have been determined in the quasi-molecular shape path within the Generalized Liquid Drop Model (GLDM) including the proximity effects between nucleons in a neck and the mass and charge asymmetry. The results are in reasonable agreement with the published experimental data for the alpha decay half-lives of isotopes of charge 112, 114, and 116, of the element 294118 and of some decay products. A comparison of present calculations with the results by the DDM3Y effective interaction and by the Viola-Seaborg-Sobiczewski (VSS) formulae is also made. The experimental α decay half lives all stand in between the GLDM calculations and VSS formula results. This demonstrates the possibility of these models to provide reasonable estimates for the half-lives of nuclear decays by α emissions for the domain of SHN. The half-lives of these new nuclei are thus well tested from the reasonable consistence of the macroscopic, the microscopic, the empirical formulae and the experimental data. This also shows that the present data of SHN themselves are consistent.It could suggest that the present experimental claims on the existence of new elements Z = 110 ～ 118 are reliable.It is expected that greater deviations of a few SHN between the data and the model may be eliminated by further improvements on the precision of the measurements.     

Experimental Study of a Pulsed Ytterbium-Doped Fibre Laser with Fast and Slow Saturable Absorbers in a Linear Cavity

We present a linear-cavity stretched-pulse fibre laser and by semiconductor saturable-absorber mirrors. A with mode locking by a nonlinear polarization rotation Q-switched mode-locking cw train and a mode-locking pulse train are obtained in the experiment. We investigate the effects of the equivalent fast saturable absorber and the slow saturable absorbers in experiment. It is found that neither the nonlinear polarization evolution effect nor a semiconductor saturable absorber mirror is enough to produce the stable cw mode-locking pulses in this experiment. A nonlinear polarization evolution effect controls the cavity loss to literally carve the pulses; semiconductor saturable absorber mirrors provide the self-restarting and maintain the stability of the modelocking operation.     

三价铬电沉积的动力学数学模型

系统分析了三价铬电沉积阴极各反应间的逻辑关系，采用数学方法推导了三价铬电沉积速度与镀液Cr^3＋浓度、搅拌（对流）强度、温度等因素的相互关系，建立了三价铬电沉积动力学数学模型．从所建模型可知，三价铬电沉积第一步反应（Cr^3＋→Cr^3＋）的电流密度受液相传质步骤控制，强搅拌下此反应可生成更多的Cr^2＋，但同时也加速了Cr^2＋从电极表面向镀液本体的扩散．Cr^2＋的还原（Cr^2＋→Cr^o）是整个三价铬电沉积过程的速度控制步骤，其电流密度与镀液扩散状况无关．选择合适的配体，加速Cr^2＋的电荷转移是提高三价铬电沉积质量的关键．     

RIP协议在CMTS中的实现

CMTS系统是HFC网络中的关键设备之一，它能够使有线电视用户实现宽带接入并享受交互式综合业务服务。在分析了RIP协议的基础上，详细描述了在CMTS上如何实现RIP协议。     

测量大数值孔径光学系统小光斑的方法

介绍了一种小孔扫描测量大数值孔径光学系统小光斑的方法。利用近场光学显微镜的光纤探针采样技术和压电陶瓷扫描技术 ,可对光学系统小光斑的光强分布进行高空间分辨的测量。由于光纤探针采样点的大小为几十纳米或更小 ,压电陶瓷扫描间距为几纳米或更小 ,因此该方法特别适合大数值孔径光学系统小光斑的测量。实验证明 ,采用该方法 ,测量的空间分辨率可达 5 0～ 10 0nm左右。     

环境扫描电子显微镜工作原理及实现

系统介绍了环境扫描电子显微镜(ESEM)的研制历程和采用的关键技术。从常规扫描电子显微镜(SEM)的基本工作原理出发，列出了SEM成像信号产生的方式及特点。针对SEM在实际应用中暴露出的缺陷，ESEM提出了解决问题的措施。多重狭缝的采用，使样品室内压强可以大幅提高，而气体二次电子探头(GSED)的发明，使作为成像信号的二次电子信号得到加强。