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重镧系离子在发光材料中的应用

中国稀土学报 2002年第6期20卷 485-490页

作者：苏锵梁宏彬赫泓陶冶吕玉华中山大学光电子材料与技术国家重点实验室广东广州510275 中国科学院长春应用化学研究所稀土化学与物理重点实验室吉林长春130022 中国科学院高能物理所正负电子对撞机国家实验室北京100039

Spectroscopic properties of heavy lanthanide ions Gd 3. , Tb 3. , Dy 3. , Ho 3. , Er 3. , Tm 3. , Yb 3. , Yb 2. and Lu 3. , and the prospect for their application in luminescence materials in the near future were disc... 详细信息

关键词：重镧系离子发光材料应用光谱性质发光性能稀土离子

A GRB Follow-up System at the Xinglong Observatory and Detection of the High-Redshift GRB 06092.

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chinese Journal of Astronomy and Astrophysics 2008年第6期8卷 693-699页

作者： Wei-Kang Zheng Jin-Song Deng Meng Zhai Li-Ping Xin Yu-Lei Qiu Jing Wang Xiao-Meng Lu Jian-Yan Wei Jing-Yao Hu National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Graduate School of chinese academy of sciences Beijing 100049 China

A gamma-ray burst （GRB） optical photometric follow-up system at the Xinglong Observatory of National Astronomical Observatories of china （NAOC） has been constructed. It uses the 0.8-m Tsinghua-NAOC Telescope （TNT） and the 1-m EST telescope, and can au- tomatically respond to GRB Coordinates Network （GCN） alerts. Both telescopes slew relatively fast, being able to point to a new target field within - 1 min upon a request. Whenever available, the 2.16-m NAOC telescope is also used. In 2.06 the system responded to 15 GRBs and detected seven early afterglows. In 2.07 six GRBs have been detected among 18 follow- up observations. TNT observations of the second most distant GRB 06092. （z = 5.5） are shown, which started as early as 91 s after the GRB trigger. The afterglow was detected in the combined image of the first 19 × 2. s unfiltered exposures. This GRB follow-up system has joined the East-Asia GRB Follow-up Observation Network （EAFON）.

关键词： gamma-rays: bursts gamma-rays: observations telescopes

Research progress in Shigella in the postgenomic era

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Science china(Life sciences) 2010年第11期53卷 1284-1290页

作者： PENG JunPing, YANG Jian & JIN Qi State Key Laboratory for Molecular Virology and Genetic Engineering, institute of Pathogen Biology,chinese {2. of Medical {3. & Peking Union Medical College, beijing 100176, china State Key Laboratory for Molecular Virology and Genetic Engineering Institute of Pathogen Biology Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China

Gram-negative,facultative intracellular anaerobes of the genus Shigella,the principal etiologic agents of shigellosis,continue to pose a threat to public health. Shigellosis causes 1.1 million deaths with over 164 million annual cases. The Shigella spp. can be divided into four serogroups:Shigella dysenteriae,Shigella flexneri, Shigella boydii and Shigella sonnei. The completion of seven Shigella genome sequences of representative strains from each of the Shigella species has introduced an era of whole-genome *** paper reviews contemporary understanding of genomics,transcriptomics,proteomics and the structural biology of Shigella.

关键词： Shigella genomics transcriptomics proteomics structural biology

Cloning, expression, and characterization of pollen allergens from Humulus scandens (Lour) Merr and Ambrosia artemisiifolia L

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Acta Pharmacologica Sinica 2005年第10期26卷 1225-1232页

作者： Ai-lin TAO~(2.3., Shao-heng HE~(2.4) Allergy and Inflammation Research institute, Shantou University Medical College, Shantou 51503.,{3.," ~The Second Affiliated Hospital of Guangzhou Medical College, Guangzhou 5102.0,{3. Allergy and Inflammation Research institute Shantou University Medical College Shantou China The Second Affiliated Hospital of Guangzhou Medical College Guangzhou China

Aim: To clone the pollen allergen genes in Humulus scandens (Lour) Merr (LuCao in chinese) and short ragweed (Ambrosia artemisiifolia L) for recombinant allergen production and immunotherapy. Methods: The allergen genes were selectively amplified in the weed pollen cDNA pool by using a special PCR profile, with the primers designed by a modeling procedure. Following truncated gene cloning and confirmation of the pollen source, unknown 3.cDNA ends were identified by using the 3.-RACE method. The gene function conferred by the full-length coding region was evaluated by a homologue search in the GenBank database. Recombinant proteins expressed in Escherichia coli pET-44 RosettaBlue cells were subsequently characterized by N-terminal end sequencing, IgE binding, and crossreactivity. Results: Three full-length cDNAs were obtained in each weed. Multiple alignment analysis revealed that the deduced amino acid sequences were 83. identical to each other and 56%-90% identical to panallergen profilins from other species. Five recombinant proteins were abundantly expressed in nonfusion forms and were confirmed by using the N-terminal end sequence identity. Sera from patients who were allergic to A artemisiifolia reacted not only with rAmb a 8(D03. derived from A artemisiifolia, but also with recombinant protein rHum s 1(LCM9) derived from H scandens, which confirmed the allergenicity and cross-reactivity of the recombinant proteins from the 2.sources. Comparison of the degenerate primers used for truncated gene cloning with the full-length cDNA demonstrated that alternative nucleotide degeneracy occurred. Conclusion: This study demonstrates a useful method for cloning homologous allergen genes across different species, particularly for little-studied species. The recombinant allergens obtained might be useful for the immunotherapeutic treatment of H scandens and/or A artemisiifolia pollen allergies.

关键词： pollen allergen profilin gene expression

A Dynamic Solution for Document Redundancies in Multiple Sources

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现代图书情报技术 2002年第S1期 129-133,149页

作者： Gong Zhiguo(Faculty of Science and Technology University of Macao,Macao 3.01,china)Zhou Longxiang (institute of Mathematics {2. {3. of Science beijing 100080 china) FacultyofScienceandTechnologyUniversityofMacauMacau3.010china instituteofMathematicschinese{2.ofScience{3.100080china

With the development of IT,more andmore document resources are available over the *** to facilitate users’retrieval of the digital documents,Integrations of the multi source systems are necessary,Sincethe individual sources collect their information independently,the same papers may be stored in different source *** traditional solutions to the redundancy problems in thedistributed environments are usually based on the globalcatalogs which keep the redundancy information for thesyst...

关键词： A Dynamic Solution for Document Redundancies in Multiple Sources

A NUMERICAL STUDY ON MECHANISM OF S-STARTS OF NORTHERN PIKE (ESOX LUCIUS)

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Journal of Hydrodynamics 2007年第2期19卷 135-142页

作者： HU Wen-rong TONG Bing-gang LIU Hao Department of Engineering Mechanics Shanghai Jiaotong University Shanghai 200240 China Laboratory for Biomechanics of Animal Locomotion Graduate University of the Chinese Academy of Sciences Beijing 100039 China Laboratory for Biomechanics of Animal Locomotion Graduate University of the Chinese Academy otSciences Beijing 100039 China Department of Electronics and Mechanical Engineering Chiba University Japan

Northern pike is regarded as a specialist in swimming acceleration. The force production mechanism of northern pike, Esox lucius, during its predation S-starts was numerically studied in this article. The problem was reasonably simplified to a loose-coupling problem of fish swimming dynamics and hydrodynamics just in the swimming direction. The approach involved the simulation of the flow by solving the two-dimensional unsteady incompressible Navier-Stokes equations and decribing the fish motion dynamics based on Newton＇s Second Law. Visualizations of flow fields and vortex structures were performed. The results show that the large acceleration is obtained mainly in the first undulatory cycle in which the amplitude increases. In the second cycle, a couple of vortices are generated and induce a jet. In the third cycle, the jet is strengthened by the mergence of the vortices in the same direction. Through discussing the effects of various controllable factors on the swimming performance, it is found that the actual locomotion mode of the northern pike in nature is just the best choice.

关键词： S-starts of fish swimming Navier-Stokesequations mechanism of force production

Change in the tilting of the ridgeline surface of the subtropical anticyclone and the predictability of the onset of the Asian summer monsoon

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chinese Science Bulletin 2003年第S2期48卷 18-23页

作者： MAO Jiangyu, DUAN Anmin, LIU Yimin WU Guoxiong State Key Laboratory of Numerical Modeling for Almospheric sciences and Geophysical Fluid Dynamics (LASG), institute of Atmospheric Physics,{2., {3. 10002., china chinese Acad Sci Inst Atmospher Phys Lab Numer Modeling Atmospher Sci & Geophys Fluid LASGState Key Lab Numer Modeling Atmospher Sci & Beijing 100029 Peoples R China

The NCEP/NCAR reanalysis data are used tostudy the relationships among the change in the tilting of theridgeline surface of the subtropical anticyclone, the estab-lishment of the so-called "seasonal transition axis (STA)" andthe onset of the Asian summer monsoon. It is shown that themonsoon onset is characterized by the overturning of themeridional temperature gradient (MTG) in the vicinity of theridgeline surface. A MTG index is then constructed to inves-tigate the predictability of the Asian summer monsoon onsetconceptually. Data diagnoses show that if the initial MTG isknown and the meridional gradient across the ridgeline sur-face of the local temperature tendency can be estimated, alate or early onset of the summer monsoon can be qualita-tively predicted in advance.

关键词： ridgeline surface meridional temperature gradient summer monsoon onset predictability.

REVIEW OF MIDDLE AND UPPER ATMOSPHERIC RESEARCH IN china

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空间科学学报 1998年第S1期18卷 53-60页

作者： WANG Ying-jian(Center for Space Science and Applied Researeh,The chinese academy of sciences, beijing 100080)

In past two years, the studies of planetary waves, gravity waves, photochemical processes and effects of solar and human activities in china have made encouraging progress. Some new instruments, e.g., VHF radar, sodium lidar,mesospheric microwave measurements and tilting filter photometer etc., have bring into operation, it enhances the observing ability to middle and upper atn1osphere greatly. In this paper main progress of the research in the upper stratosphere, mesosphere and lower thermosphere in china in the past two years is reviewed.

关键词： Middle and upper atmosphere Middle atmospheric dynamics Middle atmospheric photochemistry Atmospheric remote sensing

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RSA算法的内在特性、破解与防范措施

天津大学学报 2006年第B6期39卷 379-382页

作者：周绯菲鲁士文中国科学院研究生院

为了给RSA(Rivet、Shamir和Adelman提出的)算法的使用者提供参考,从不动点、周期性、对明文的要求、保密性和加密速度等方面分析了这种加密算法的内在特性,从理论和实际两方面对该算法的脆弱性以及针对该算法的攻击方法进行了分析。归... 详细信息

为了给RSA(Rivet、Shamir和Adelman提出的)算法的使用者提供参考,从不动点、周期性、对明文的要求、保密性和加密速度等方面分析了这种加密算法的内在特性,从理论和实际两方面对该算法的脆弱性以及针对该算法的攻击方法进行了分析。归纳出如何防范针对该算法攻击的结论,得出了RSA使用者使用的密钥匙位数必须大于2.48位才能保证算法安全性这一结果．通过给黑客的攻击方法进行分类,从算法维护和安全策略定制的角度,总结了网络安全人员提升加密算法安全性的办法．

关键词：加密算法解密破解