大数据时代信息资源利用研究

当今不断增长的数据量和数据种类衍生出“大数据”这一现象。阐述了大数据时代信息资源的特点,分析了基于大数据的信息源的选择,探讨了大数据时代信息资源的利用。     

Fuzzy分级统计在生物龄估算中的应用

本文利用 Fuzzy 分级统计建立了生物龄估算模型,并对166人进行了生物龄估算,同时,又用分明分级统计给出的生物龄估算模型对上述166人进行了生物龄估算,结果用 Fuzzy 分级统计给出的生物龄估算模型比用分明分级统计给出的生物龄估算模型估算的符合率高。     

Inhibition of proliferation by 1-8U in interferon-α-responsive and non-responsive cell lines

Interferon (IFN)-inducible proteins of the 1-8 gene family mediate homotypic adhesion and transduction of antiproliferative signals. Their induction correlates with inhibition of cell growth while they are often repressed in the course of malignant transformation and tumor development. Ras-mediated transformation of mouse mast cells is associated with downregulation of 1-8U expression and interferon-α (IFN-α) treatment reverts the proliferation rate to normal levels together with induction of 1-8U. Conversely, the antiproliferative responses of IFN-α in sensitive human melanoma cells are accompanied by 1-8U induction. Here we provide direct evidence that recombinant expression of 1-8U in human cell lines is sufficient to block cell proliferation. Based on the abundant expression and subcellular localization to the plasma membrane and exosome-like structures, we propose a model capable of explaining the pleiotropic functions of 1-8 family proteins in tumor cells and during normal development. Received 15 January 2003; received after revision 21 March 2003; accepted 25 March 2003 RID="*" ID="*"Corresponding author.     

Molecular basis of osteoarthritis: biomechanical aspects

The unique biomechanical properties of healthy cartilage ensure that articular cartilage is able to transmit force between the joints while maintaining almost friction-free limb movement. In osteoarthritis, the biomechanical properties are compromised, but we still do not understood whether this precedes the onset of the disease or is a result of it. This review focuses on the physical changes to cartilage with age, disease, and mechanical loading, with specific reference to the increased collagen cross-linking that occurs with age (nonenzymatic glycation), and the response of chondrocytes to physiological and pathological loads. In addition, the biomechanical properties and matrix biosynthesis of cartilage from various joint surfaces of the knee and ankle are compared to elucidate reasons why the ankle is less affected by progressive osteoarthritis than the knee.     

中国外交的"路径依赖"和思维定势反思

新中国外交仍有一些基于自身文化传统的思维定势,如政治价值观上的整体思维、政治分析中的类比方法、政治认知方式中的"家国观"、政治发展方式上的"变法"形式等.它们可能与以美国为主导的现有国际制度建构思路和国际组织操作方式发生对峙甚至冲撞.借用制度经济学"路径依赖"的审阅视角,能够帮助我们正视和预知自己的思维惯性和处事模式,尽可能避免频繁的外交冲突和误解.     

Zircon U-Pb dating of basement gneisses in the super-large Bayan Obo REE-Fe-Nb deposit,Inner Mongolia

Zircon U-Pb ages have been determined for basement gneisses in the Bayan Obo REE-Fe-Nb deposit. On the U-Pb concordia diagram data of three samples yield upper intercept ages of 1948-1917 Ma. Thus, these basement gneisses are of Paleoproterozoic. Rock association of these basement gneisses includes tonalite, syenite and paragneiss, not belonging to a sedimentary package. It is more appropriate to consider this association as a basement complex rather than a stratigraphic "Group".     

人才系统规划的一种仿真方法

本文研究多级人才系统的控制(规划)问题,人才在该系统中以不同年龄分布在不同级别中。人才系统的年龄与级别结构往往不很理想,如何控制人才的流动才能使人才系统的结构变得更为合理是人才系统规划的重要问题。在现有文献中。都将招聘作为控制手段,而晋升则为随机变量。本文则适合我国国情,将招聘作为外生变量而用晋升作为控制手段,并以仿真方法解决了使人才系统能跟踪一个理想变化轨迹而最后达到理想的优化控制。最后并以某大学的教师队伍结构调整为例,示明本文所提方法是有效和可用的。     

配位副反应系数的实验测定

提出了配位副反应系数的实验测定方法．本方法手续与计算简便，试用于钢（铀）－偶氮胂Ⅰ体系，获得了令人满意的结果．