共查询到20条相似文献,搜索用时 56 毫秒
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在一场足球比赛中,我们把同一个球员射进三个进球称为“帽子戏法”,通常射术高超的球员在比赛中完成一次“帽子戏法”往往能给球迷带来无限的享受。当然,对球员来说,要想在比赛中完成“帽子戏法”也是一件非常不容易的事情, 相似文献
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在视神经横切面图像中,将每个神经纤维的边界精确地分割出来,是视神经形态分析的重要环节。由于神经纤维数量巨大、形态各异,单纯采用一种分割方法无法获得满意效果。采用基于Watersnake的分割方法,整合Watershed和Snake在图像分割方面的优势,分两步进行纤维分割。首先由Watershed获取纤维的粗轮廓,在此基础上由Snake经曲线演化获得纤维的精细轮廓。实验结果表明,Watersnake能较好地识别神经纤维的内外轮廓,为后续的神经纤维形态分析奠定基础。 相似文献
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聚乙烯醇(PVA)是一种用途很广的高分子聚合物,其毒性低,生物相容性好,亲水性强,有良好的成膜性、黏结力和乳化性,在生物医学领域有广泛应用.主要介绍聚乙烯醇在支架材料、骨材料、药物释放系统、膜剂、涂膜剂及外科手术等中的应用研究.对聚乙烯醇的进一步研究和开发,将赋予其更广泛的医药应用前景.
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Polyvinyl alcohol (PVA) is a very useful polymer, which has low toxicity, good bioeompatibility and high hydrophilieity and good abilities of film-forming, adhering and high emulsification. It has been widely used in many biomedical areas. In this review, we mainly focused on introducing the applications of PVA in scaf-fold material, bone material, drug delivery system(DDS), film, surgery and so on. With further research and devel-opment, PVA will be given a wider range of pharmaceutical and medical applications. 相似文献
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因不能和自己所爱的人结婚,很多同性恋者会依从周围人的意愿,与一个自己并不喜欢的异性步入婚姻。结婚后,当婚姻不能带来充分的满足感时,他们只能开始在婚外寻找同性朋友。而他们的配偶在知情后,不得不重新审视对方性取向给自己生活带来的重大影响。在当今这个性取向多元化的时代,同性恋者和异性恋组成的家庭问题也开始浮出水面。 相似文献
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高校是培养高素质人才的摇篮,辅导员工作是培养学生健全人格、优秀品格、进取精神的重要保证。高校辅导员是一支特殊的队伍,与学生联系最多,相处时间最长,接触机会最频繁,是学生思想政治工作第一线的组织者和教育者,扮演着指导学生在校期间德智体全面发展的特殊角色。 相似文献
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临床决策支持系统(Clinicdecisionsupportsystem,CDSS)是近年医院信息化建设的又一个热点问题,其所涉及的逻辑推理方法、知识库建立、数据挖掘、以及与现有HIS的整合等问题都处于探索阶段。本文从HIS、CDSS等有关概念谈传统CDSS的不足,以及基于HIS的CDSS的研究思路,最后重点分析基于HIS的CDSS的功能要求,为CDSS的研究提供参考资料。 相似文献
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Shuler ML 《Annals of biomedical engineering》2012,40(7):1399-1407
We seek to construct physical and mathematical models of life. Such models allow us to test our understanding of how living systems function and how they respond to human imposed stimuli. One system is a genomically and chemically complete model of a minimal cell. This cell is a hypothetical bacterium with the fewest number of genes possible. Such a minimal cell provides a platform to ask about the essential features of a living cell and forms a platform to investigate “synthetic biology.” A second system is “Body-on-a-Chip” which is a microfabricated microfluidic system with cells or tissue constructs representing various organs in the body. It can be constructed from human or animal cells and used in drug discovery development. That model is a physical representation of a physiologically based pharmacokinetic model. Both the computer and the physical models provide insight into the underlying biology and provide new tools to make use of that understanding to provide benefits to society. 相似文献
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Endometrial cancer risk is influenced by reproductive behaviours, including parity and breastfeeding, and timing of life history events such as age at menarche and menopause. One potential mechanism by which altered reproductive strategies may influence endometrial cancer risk is through exposure to reproductive hormones. Current theory suggests that high lifetime exposure to oestrogen, unopposed by progesterone, increases endometrial cancer risk; here we suggest that progesterone deficiency itself may also play a significant role. Additionally, given that reproductive profile variables are themselves influenced by early childhood conditions, we hypothesise that endometrial cancer risk may be influenced by the childhood psychosocial environment as mediated through changes to adolescent and adult reproductive behaviours and hormone exposures. Investigating reproductive cancers, including endometrial cancer, using a life history approach may help to increase understanding of why these cancers occur and potentially help implementation of early detection and screening processes in the future. 相似文献
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Kadmon P 《American journal of medical genetics. Part A》2007,(17):1958-1959