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生物多样性的科学信息系统需要提供技术评估资料。对所收集的数据、模型与专家系统、技术支撑系统等的评估,是为用户提供指引性的概述。其数据分析与评估、信息系统技术评估是最基本的和最重要的内容之一。评估技术与空间数据查询技术构成广义的人机界面的基本部分之一。 相似文献
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生物多样性信息系统建设的现状及CBIS简介 总被引:18,自引:0,他引:18
为了实现生物多样性保护和持续利用,履行《生物多样性公约》,各国政府及组织建立了大量的生物多样性信息(数据库)系统,为保护和利用的决策提供科学的支持。信息技术特别是计算机网络的发展为生物多样性信息系统的建设提供了强有力的工具和基础,使全球化的信息共享成为可能。本文简要介绍了国际上几个著名的生物多样性信息系统的建设目的、内容、现状和特点,并对国内生物多样性信息系统建设的代表——中国生物多样性信息系统(CBIS)做了介绍。 相似文献
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网络是医院信息系统正常运行的平台。本文结合医院实际,从组网技术、拓扑结构、VLAN、防火墙和网管系统等多方面讨论医院网络的建设。 相似文献
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中国濒危动物物种信息系统(CESIS) 总被引:1,自引:0,他引:1
中国濒危动物物种信息系统(CESIS)解焱陈焰邹学英王迪汪松(中国科学院动物研究所,北京100080)1前言中国濒危动物物种信息系统已在中国科学院动物研究所基本建立,该信息系统作为中国科学院“八五”重大项目“生物多样性信息系统的初步建立”的课题之一,... 相似文献
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目的 结合我国当前实际,参考国外发达国家的经验,建立先进的医院信息系统,为改善病人就诊环境,赢得最优的服务效率和质量,为各级医院信息化的进一步发展提升提供参考。方法 在广泛收集国内外研究成果的基础上,将理论与实证分析相结合,分析国外发达地区医院信息系统发展与我国的不同及差距,重点分析美国医院信息系统的发展。结果 通过分析可以看出以下方面的差距:(1)政府的作用,(2)医院信息化的投资规模,(3)标准化的推广和保险体制的完善,(4)信息技术应用的深度和广度。结论 通过对比分析,总结经验与教训以及我国须注意和改进的具体问题,得出了对我国有益的启示。 相似文献
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统计软件系统在医院信息化建设中的应用 总被引:1,自引:0,他引:1
医疗统计信息系统是国家八五重点攻关课题一中国医院信息系统(CHIS)中一个重要的应用系统。随着医疗信息技术的快速发展以及新医疗保险制度的实施,越来越多的医院实行了计算机网络化管理,这给传统模式的医院统计工作带来巨大冲击。医院在全面建设信息化的过程中,统计软件系统能更好地满足当前数字化医院发展的需要。 相似文献
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GIS支持下的青石山小流域农业生态信息系统(QWAEIS)及其应用研究 总被引:13,自引:2,他引:11
应用地理信息系统(GIS),建立了青石山小流域农业生态信息系统(QWAEIS),该系统综合了土壤、土地利用、水资源及地形地貌等空间信息和气候、人口、农业生产等基本信息。该系统能对小流域农业生态信息进行有效地分析和管理,应用此系统,进行了小流域的土地适宜性评价,获得土地适宜性评价结果,为小流域规划提供了空间定位信息。 相似文献
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Although the importance of the endosperm as a food store inmany angiosperm seeds is well known, its significance duringearly embryogenesis has been neglected. In many interspecifichybrids, and in some other situations, embryos do not developfully and abort. It has often been stated that this is causedby the endosperm failing to conduct sufficient nutrients tothe embryo, but seldom has it been suggested that the endospermactively controls most of the early stages of morphogenesisof the embryo. Information gleaned from a broad survey of theliterature, combined with additional evidence presented here,obtained fromSolanum incanumand interspecific hybrids, indicatethat the endosperm is dynamic and very active in regulatingearly embryo development. This requires highly integrated geneticcontrol of rapidly changing metabolism in the endosperm. Ininterspecific hybrids, lack of coordination may cause unbalancedproduction of growth regulating substances by the endospermand hence abortion of the embryo, or even unregulated productionof nucleases and proteases resulting firstly in autolysis ofthe endosperm and then digestion of the embryo. The endospermmay thus serve to detect inappropriate hybridization of speciesor ploidy levels and so prevent waste of resources by producingseeds that would result in sterile hybrids or unthrifty subsequentgenerations. This discriminatory function of the endosperm hasdiminished during evolution and domestication of the crop plantSolanummelongenaL.Copyright 1998 Annals of Botany Company Solanum, embryo morphogenesis, endosperm, hybrid, seed development. 相似文献
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Michele Rivkin-Flsh 《Medical anthropology quarterly》2000,14(1):119-120
Pragmatic Women and Body Politics. Margaret Lock and Patricia A. Kaufert. eds. Cambridge, UK: Cambridge University Press, 1998. xii +364 pp.
Maternities and Modernities: Colonial and Postcolonial Experiences in Asia and the Pacific. Kalpana Ram and Margaret Jolly. eds. Cambridge, UK: Cambridge University Press, 1998. xiv. 305 pp. 相似文献
Maternities and Modernities: Colonial and Postcolonial Experiences in Asia and the Pacific. Kalpana Ram and Margaret Jolly. eds. Cambridge, UK: Cambridge University Press, 1998. xiv. 305 pp. 相似文献
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Höpfl G Ogunshola O Gassmann M 《American journal of physiology. Regulatory, integrative and comparative physiology》2004,286(4):R608-R623
For most organisms oxygen is essential fo life. When oxygen levels drop below those required to maintain the minimum physiological oxygen requirement of an organism or tissue it is termed hypoxia. To counter act possible deleterious effects of such a state, an immediate molecular response is initiated causing adaptation responses aimed at cell survival. This response is mediated by the hypoxia-inducible factor-1 (HIF-1), which is a heterodimer consisting of an alpha- and a beta-subunit. HIF-1 alpha protein is stabilized under hypoxic conditions and therefore confers selectivity to this response. Hypoxia is characteristic of tumors, mainly because of impaired blood supply resulting from abnormal growth. Over the past few years enormous progress has been made in the attempt to understand how the activation of the physiological response to hypoxia influences neoplastic growth. In this review some aspects of HIF-1 pathway activation in tumors and the consequences for pathophysiology and treatment of neoplasia are discussed. 相似文献
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Studies of human constitution and mental features are traditionally among the main concepts of anthropological research. In
this research, we attempted to discover connections between morphological and constitutional features and self-esteem in children
and adolescents. Such a connection was discovered in some studied age groups. The obtained results could serve as a basis
for further studies in this field. 相似文献