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INVESTIGATION OF THE STRUCTURES OF ZnTe/GaSb BY X-RAY TRIPLE-AXIS SCATTERING AND CRYSTAL TRUNCATION ROD
ZnTe/GaSb结构的X射线三轴晶散射和晶体截断杆研究

LI CHAO-RONG,<br>
物理学报 , 1997,
Abstract: 用X射线三轴晶散射和晶体截断杆扫描研究了不同工艺条件下分子束外延生长的ZnTe/GaSb结构.X射线晶体截断扫描显示,从衬底表面清洁温度到生长温度退火过程中采用Zn气氛的样品具有清晰的干涉条纹,而在Te气氛下退火则晶体截断扫描没有干涉条纹.在倒易点004,115附近X射线散射的二维强度分布图显示,两种条件下生长样品的晶格失配应力都没有弛豫.二维等强度分布图和沿[110]方向的扫描,都显示在Te气氛下生长的膜具有较强的漫散射,并且分布较宽.这种漫散射来源于界面相Ga2Te3<
Diversity and ecological function of free\|living heterotrophic flagellates
自由生活的异养鞭毛虫多样性及生态功能

li fengchao,<br>,曹卫,康现江
生态学报 , 2009,
Abstract: As increasing attention has recently been paid to the structure and function of the water ecosystems, the ecological function of free\|living heterotrophic flagellates in water ecosystems has emerged as a central issue in water ecological research. Researches have shown that heterotrophic flagellates are being important members of microbial food webs. Strengthen and expand the researches on heterotrophic flagellate diversity, community structure and their function in nutrient recycling will contribute to understanding on the structure, function and the process of water ecosystems. In this paper, species diversity, community structure and feeding ecology of heterotrophic flagellate were summarized. The mechanism in nutrient recycling and the function in water ecosystem of heterotrophic flagellate were also discussed.
Extensions to Athena for Analyzing Guessing Attack
针对猜测攻击的Athena方法的扩展

LI Chao,DONG Rong-Sheng,<br>,
计算机科学 , 2007,
Abstract: 猜测攻击是安全协议中一类特殊问题,对其进行研究具有现实意义。本文针对猜测攻击,引入了基于串空间模型的Athena分析方法,并考虑了攻击者对弱口令的猜测能力。为此,在串空间模型的消息项中引入了可验证项的概念,以描述猜测攻击条件中的验证项,同时扩展了串空间中攻击者的能力,赋予了攻击者对弱口令的猜测能力;为在Athena后继函数搜索算法中实现对验证项的关联,以判断猜测攻击,在Athena方法的状态表示法中引入猜测验证目标及猜测验证目标绑定的概念,对状态、推理规则进行相应的修改,同时扩展后继状态函数,使扩展后的函数具备分析猜测攻击的能力;最后运用扩展后的Athena方法对会话密钥建立协议(key-establishment protocol)进行分析。分析发现,当pk为对称密钥时,协议存在猜测攻击,并给出了攻击路径。
Development of Satellite Data Catalogue and Archive System
新型遥感卫星数据目录服务系统的研制

WANG Chao-liang,LI Chuan-rong,JIA Bin,<br>汪,,贾斌
遥感学报 , 2007,
Abstract: With the development of the remote sensing technology,many new types of remote sensing sensor are being developed immediately and used for earth observation.Large numbers of earth images,which are very important to research earth,are obtained.As remote sensing satellite data has a tendency to become high temporal,spatial and spectral resolution,its volume is increasing sharply.It is a great problem on how to efficiently restore,manage and search mass of remote sensing satellite data.And satellite data catalogue and archive system,a mass storage and searching web-based system,is just the tool to solve the problem.In order to develop high efficient,high reliable and maintainable archive and catalogue system,the characteristics of satellite data's metadata are analyzed in the paper firstly,which determine the structure of storage organization.Then some critical technology on developing new type of archive and catalogue system are provided,including mass storage,spatial data storage,the implementation of high reliable system,archive and catalogue database's optimization.At last,archive and catalogue system's hardware structure is shown and its main functions are introduced briefly and an example of searching RESOURCESAT-1 satellite data is given.
x射线三晶衍射及其应用

物理 , 1994,
Abstract: ?x射线三晶衍射由于同时采用了单色器和分析器,因而能区分样品中由完美晶体部分对x射线的动力学衍射和由缺陷部分引起的运动学散射,还可把晶体中晶格常数的变化和晶格取向缺陷区别开,并可测定倒易点附近x射线散射强度的二维分布图。近来,x射线三晶衍射技术广泛应用于研究晶体的表面和界面粗糙度、表面损伤、晶体内的微缺陷以及精确确定外延膜的结构参数等。此外,还简要地介绍了x射线三晶衍射的技术、原理和应用。
Effects of AM fungi on leaf photosynthetic physiological parameters and antioxidant enzyme activities under low temperature
丛枝菌根真菌对低温下黄瓜幼苗光合生理和抗氧化酶活性的影响

LIU Airong,CHEN Shuangchen,LIU Yanying,LI Yannan,HE Chaoxing,<br>刘爱,陈双臣,刘燕英,艳楠,
生态学报 , 2011,
Abstract: 作者于塑料连栋大棚栽培条件下,研究了接种丛枝菌根真菌(AMF)Glomus mossea-2对低温下黄瓜(Cucumis sativus L.)幼苗同化产物积累、光合生理和过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)、抗坏血酸过氧化物酶(APX)的活性及基因表达的影响。结果表明:低温显著抑制了AMF对黄瓜根系的侵染能力和菌根相对依赖性。接菌后30d—45d AMF为快速侵染期。接种AMF植株的鲜重根冠比、总干重、总鲜重均显著大于未接菌处理。低温胁迫下,接种AMF延缓了光合速率、根系活力、羧化效率和叶绿素、可溶性蛋白含量的下降,并且使丙二醛(MDA) 的含量保持相对较低的水平,诱导了抗氧化酶基因的表达及活性提高。接种AMF可以使叶片维持较高的抗氧化酶水平和光合能力,增强了对低温胁迫的抗性。 关键词:黄瓜;丛枝菌根真菌;低温;抗氧化酶
Feeding ecology of dorab wolf-herring, Chirocentrus dorab from the Beibu Gulf
北部湾宝刀鱼的摄食生态

YAN Yunrong,YANG Houchao,LU Huosheng,LI Rongwei,<br>颜云榕,杨厚,卢伙胜,
生态学报 , 2011,
Abstract: Based on the monthly sampling in the main fishing ports such as Beihai,Basuo,Jianghong and Sanya of the Beibu Gulf from October 2008 to September 2009,and combined with the fishery-dependent trawl survey in February 2010,traditional stomach contents analysis and stable isotope analysis were used to study the prey category,trophic position and ontogenetic feeding habit shifts of the dorab wolf-herring,Chirocentrus dorab in the Beibu Gulf,South China Sea.A total of 645(344 stomachs with contents) dorab wolf-h...
THE INFLUENCE OF THE DEVIATION ANGLE ON THE ROCKING CURVE AND ITS WIDETH
晶体表面偏角对摇摆曲线及其半峰宽的影响

LI CHAO-RONG,MAI ZHEN-HONG,CUI SHU-FAN,<br>,麦振洪,崔树范
物理学报 , 1992,
Abstract: The influence of the deviation angle of the sample surface from the exact crystalline surface on the X-ray double crystal rocking curves an{d its full width at half maximum (FWHM) were investigated based on the X-ray dynamical diffraction theory. The results show that when the sample surface has a deviation from the exact crystalline surface, the profile of rocking curves and their FWHMs are dependent on the incident angle and the direction of X-ray beam. Moreover, with the decreasing of the incident angle, the FWHM of rocking curve increases, and the reflection peaks shift to the high angle region. This influence becomes more significant when the asymmetrical diffraction is used.
X-RAY TRIPLE AXIS SCATTERING STUDIES OF YBa2Cu3Oy SUPERCONDUCTING THIN FILM
X射线三晶衍射研究YBa2Cu3Oy超导薄膜

LI CHAO-RONG,MAI ZHEN-HONG,P D HATTON,C H DU,<br>,麦振洪,P. D. HATTON,C. H. DU
物理学报 , 1993,
Abstract: The YBa2Cu3Oy thin film on LaAlO3 substrate was investigated by triple axis scattering. Stress, main defects in the film and the crystallographic relationship between the thin film and substrate were studied. Experimental results show that the thin film on substrate was slmost totally relaxed and very low strain and stress existed in the film. The film behaves as a "free" bulk layer on the subtrate. The larger mosaic width of the film indicates the film has poor crystallinity and includes a lot of lattice misorientation defects. Misorientations between the film and substrate were observed in both the perpendicular and parallel direction of the surface.
STUDIES OF THE IMPURITY EFFECTS ON CRYSTALLINE QUALITY BY HIGH-RESOLUTION X-RAY DIFFRACTION
高分辨X射线衍射研究杂质对晶体结构完整性的影响

LI CHAO-RONG,WU LI-JUN,CHEN WAN-CHUN,<br>,吴立军,陈万春
物理学报 , 2001,
Abstract: Sr(NO 3) 2 single crystals with different impurities doped were grown from aqueous solutions. The distribution of impurities in Sr(NO 3) 2 crystals were investigated by electron probe micoranalysis. Results show that the distribution of impurities illustrates a compositional zoning behaviour. The Ba 2 has a higher concentration in the {100} growth sectors than in the {111} sectors. On the contrary, Pb 2 has a higher concentration in {111} growth sectors than in {100} sectors. The crystalline perfection of the pure and Ba 2 or Pb 2 doped Sr(NO 3) 2 crystals was studied by high-resolution X-ray rocking curve technique. The high-resolution X-ray rocking curve of the ideal Sr(NO 3) 2 crystal was theoretically calculated based on the dynamical X-ray diffraction theory. High-resolution X-ray diffraction results show that the crystalline quality in the growth sectors of the pure Sr(NO 3) 2 crystal is fairly high, since its experimental rocking curve is very close to the theoretical calculation. However, in the areas of the sector boundary the full width at half maximum of the rocking curve gets broader due to the lattice stress in the boundary area. The doping of impurities will deteriorate the quality of the crystal and induce an inhomogeneity behaviour of the crystalline quality. As for the Ba 2 doped Sr(NO 3) 2 crystal, the crystalline quality in {111} growth sectors is higher than that in {100} sectors. On the contrary, the crystalline quality in {100} growth sectors is higher than that in {111} sectors for Pb 2 doped Sr(NO 3) 2 crystal. This coincides well with the composition distributions of the dopants.
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