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An AES study of the initial oxidation of Ce-5wt.% La alloy at room temperature and low oxygen pressure

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An AES study of the initial oxidation of Ce-5wt.% La alloy a...

2004年国际稀土研究应用研讨会

作者： YANG Jiangrong, WANG Xiaolin, XIAO Hong, ZHOU Wei, JIANG Chunli,LU Lei (China Academy of Engineering Physics, P.O.Box 919-71,Mianyang, P.R.China, 621900)

Lanthanum and Cerium are the first two , and the most reactive , members of the lanthanide series. In particular ,Cerium exhibits a variety of interesting phenomena under various conditions. Besides being an antiferromagnet, a superconductor, and a mixed valence system, it is the one pure element to exhibit Kondo scattering and a solid-solid critical point. The phenomena occur because the energy of the inner 4f lever is nearly the same as those of the outer 5d and 6s levers, and only small amounts of energy are required to change the relative occupancy of the electronic levels giving rise to a variable electronic structure. Due to the 4f levels are very close to that of 5d and 6s, cerium is quite sensitive to external influence such as temperature, pressure and chemical environment. In this present paper, Auger Electron Spectroscopy has been used to characterize the initial oxidation of Ce-5wt.%La alloy in an oxygen atmosphere at low pressure(0-6Pa) and room temperature after cleaning the surface by Ar+ -ion bombardment. It is conclude from this work that oxidation proceeds as follows: (a)dissociative chemisorption for oxygen exposure lower that 5L(Langmuir), and the kinetics of oxidation follows a linear law;(b) formation of oxide layer between 5 and 25L, and its growth follows a parabolic relationship;(c) thickening of the oxide film grown in the previous stage, and the uptake of oxygen reachs saturation at oxygen exposure of 25L,and the oxide film mainly consists of Ce2O3, no CeO2 evidence was observed lower than 60L.

关键词： Auger Electron Spectroscopy Oxidation Ce-La alloy

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室温硫化硅橡胶胶粘剂的增强方法

弹性体 2003年第2期13卷 44-46页

作者：廖宏中国工程物理研究院化工材料研究所四川绵阳621900

通过硅橡胶丙烯酸(酯)改性、自制偶联剂、选择活性高分子材料、改善填料在胶粘剂中的分散性等方法,较好地提高了双组份室温硫化硅橡胶的粘接强度。

关键词：室温硫化硅橡胶胶粘剂增强方法改性偶联剂选择活性

Bio-distribution research of a novel 188Re-TPPS4 in mice

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Bio-distribution research of a novel 188Re-TPPS4 in mice

首届全国分子核医学暨分子影像学学术交流会

作者： JIA Zhiyun, DENG Houfu, PU Manfey l.Dept. of Nuclear Medicine, West China Hospital. Sichuan University, Sichuan Chengdu 610041, China Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan Mianyang 621900

Objective To evaluate biological behaviors of a novel 188Re-TPPS4 porphyrin derivative in normal mice and tumor nude mice. Methods TPPS4 (meso-tetrakis4-sulfophenyl) porphyrin) was synthesized and characterized with improving methods. 188ReO4- was acquired from an 188W/188Re generator. The labelling of TPPS4 with 188ReO4- were optimized and achieved by varying reaction conditions. Neoplasm transplantation model of nude mice bearing melanoma or hepatoma were set up and divided randomly into 2 groups, each contains 5 animals;Normal Kunming mice were randomly divided into 10 groups, 10 animals in each group.188Re-TPPS4 were injected respectively into nude mice and Kunming mice via tail veins , SPECT imaging of the nude mice were carried out at different time and the mice were killed with radioactivity of major organs or tumour determined accordingly. Results It showed that the complexation yield was more than>98% as estimated by paper chromatography in acetone and in saline, with the specific activity up to 16.9GBq (mol.T3,4CPP)-1.188Re-TPPS4 did not significantly decrease during the period of 48h after the derivative formation with the preparation containing lOmg.L-1 Vc (Vitamin C) and via dilution ratio of 188Re-TPPS4 preparation within the range of 5 to 15 using physiological saline. It proved that Vc could increase stability of the derivative in vivo;and 188Re-TPPS4 had biological property of fast blood clearance(-90% 24h post-injection), certain uptake in kidney and liver, lower activity in other tissues and major renal clearance with its metabolites. At 8h post-injection, the uptake of 188Re-TPPS4 was up to 5.7% and 4.4%(%ID.g-1) in liver tumor and melanoma, respectively;tumour/blood and tumour/muscle ratios in hepatoma-bearing and melanomas-bearing mice were observed to be 3.8、26.0 and 2.6、21.0, respectively. This uptake in the tumour was retained until 24h post-injection with major activity showing renal clearance, no significant activity was present in other o

关键词： 188Re porphyrin derivative bio-distribution mice tumor-bearing nude mice

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电液振动台系统建模及仿真模型应用

系统仿真学报 2008年第S1期20卷 258-260,264页

作者：王珏牛宝良胡绍全中国工程物理研究院总体工程研究所四川绵阳621900

以伺服阀非线性建模为核心,利用MATLAB/SIMULINK建立的电液振动台非线性仿真模型,在与某型号地震模拟振动台实验对比中,仿真出了该系统在某些频段内存在的加速度波形失真趋势,且具有一定的准确性。仿真模型在离心场中电液振动台设计方... 详细信息

以伺服阀非线性建模为核心,利用MATLAB/SIMULINK建立的电液振动台非线性仿真模型,在与某型号地震模拟振动台实验对比中,仿真出了该系统在某些频段内存在的加速度波形失真趋势,且具有一定的准确性。仿真模型在离心场中电液振动台设计方面的应用表明:量化直观的仿真结果为系统参数设计和优化提供了重要参考;仿真系统为波形失真消除方案设计、控制算法研究和系统参数优化提供了良好的仿真平台。

关键词：系统仿真液压系统非线性建模电液振动台

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环境因子的定义及研究现状

信息与电子工程 2003年第1期1卷 88-92页

作者：胡斌中国工程物理研究院电子工程研究所四川绵阳621900

从普遍接受的三个基本假设出发,讨论环境因子的定义和失效机理不变的约束条件,重点综述环境因子的研究现状和常用方法,并探讨引入反应论模型解决环境因子预测问题的可能途径。

关键词：环境因子可靠性寿命分布反应论模型

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一种高效融合MATLAB与VB的编程技术

信息与电子工程 2003年第3期1卷 64-66页

作者：杨莉中国工程物理研究院电子工程研究所四川绵阳621900

介绍了一种基于动态链接库(DLL)调用的融合MATLAB与VB的编程技术,它以Matcom技术编制的Mideva软件为中介,集中发挥了两种语言的各自优点,并能使集成后的软件完全脱离Matlab的运行环境。提供的实现过程和编程实例均说明,此方法简单、方... 详细信息

介绍了一种基于动态链接库(DLL)调用的融合MATLAB与VB的编程技术,它以Matcom技术编制的Mideva软件为中介,集中发挥了两种语言的各自优点,并能使集成后的软件完全脱离Matlab的运行环境。提供的实现过程和编程实例均说明,此方法简单、方便、可操作性强。

关键词：动态链接库 MATLAB VisualBasic 混合编程 Mideva软件

基于第三方控件动态报表打印控件的设计与实现

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信息与电子工程 2004年第3期2卷 225-228页

作者：宋涛西南计算中心四川绵阳621900

传统的报表打印功能在系统开发时就已定制好,不同系统不能共享报表的设计。本文从面向对象的角度出发,将报表划分成五个部分,并对报表建模,然后利用 ActiveX控件技术把对象模型实现为动态报表打印控件。只需在系统设计阶段引用控件,并... 详细信息

传统的报表打印功能在系统开发时就已定制好,不同系统不能共享报表的设计。本文从面向对象的角度出发,将报表划分成五个部分,并对报表建模,然后利用 ActiveX控件技术把对象模型实现为动态报表打印控件。只需在系统设计阶段引用控件,并通过可视化的界面简单地把数据源绑定到控件上,就可快速设计出用于打印的报表,从而达到报表设计复用的目的,同时也能提高系统的开发速度。

关键词：计算机软件动态报表打印控件第三方控件复用面向对象