半相合供者淋巴细胞输注抗中、高危非霍奇金氏淋巴瘤的实验研究     

罗纯 《襄樊职业技术学院学报》2008,7(3):25-27

目的阐明半相合供者淋巴细胞输注（DLI）抗中、高危非霍奇金氏淋巴瘤（NHL）的机制。方法通过预实验确定输注最佳时间及最佳浓度,并检测此条件下加入去CD8^＋T细胞和去CD4^＋T细胞半相合DLs培养后细胞的凋亡率及培养液中白细胞介素-2（IL-2）的浓度。培果在最佳输注时间（培养后24小时）、最佳浓度（2．5×10^5／ml）下加入去CD8^＋T细胞半相合DLs进行培养,淋巴瘤细胞凋亡率（17．6±2．5）％与对照组（4．6±1．2）％及加入去CD4^＋T细胞半相合DLs（5．2±1．6）％相比较,有显著性差异,而且加入去CD4^＋T细胞半相合DLs的培养液中IL-2浓度显著高于加入去CD4^＋T细胞者和对照组。结论CD4^＋T细胞在移植物抗淋巴瘤效应中可能起着比CD8^＋T细胞更重要的作用,在临床使用中,选择性去除CD4^＋T细胞,可减少或减轻移植物抗宿主病（CVHD）,并且不影响移植物抗淋巴瘤效应。IL-2在半相合DIs发挥移植物抗淋巴瘤效应过程中可能起着重要的作用。  相似文献   

Relationships amongst cultural dimensions,educational expenditure and class size of different nations     

Hoi Yan Cheung  Alex W.H. Chan 《International Journal of Educational Development》2008

Many studies have concentrated on investigating educational expenditure and pupil–teacher ratio to see how these two factors can influence the quality of education. This study chooses to examine these two educational factors from a different perspective. If educational expenditure and pupil–teacher ratio really have a significant impact on the quality of education as many studies have claimed, it is important to step back and understand why some regions choose to have high/low educational expenditure and high/low pupil–teacher ratios. This study found that culture has an important impact on these two educational factors. Hofstede's cultural dimensions, namely Power Distance and Individualism, were applied and results showed that these two cultural dimensions, when applied to 43 regions around the world, demonstrated a significant impact on educational expenditure and pupil–teacher ratio.  相似文献   

基于ASP.NET的交叉表的—种新的实现方法     

韩姣红 《中国科技信息》2005,(16A):47-47,43

对数据库的交叉表的实现有很多的实现方案，但是以前的实现方法不能在作为字段名称的原表中的字段数据未如时实现交叉表，本文提出的这种实现方法能解决这一情况，并结合实例介绍这种方案的具体实现。  相似文献   

浅谈跨文化的英语教学          下载免费PDF全文

田青 《惠州学院学报》2003,23(4):81-86

本文从跨文化的角度探索新形势下的英语教学，阐明了语言与文化的关系、中西方文化的差异，以及中学生常犯的跨文化交流方面的错误和原因，并就当前英语教学中存在的问题提出了一些解决的办法。  相似文献   

Comparing beliefs about appropriate practice among early childhood education and care professionals from the U.S., China, Taiwan, Korea and Turkey   总被引：1，自引：0，他引：1  

Mary McMullen  James Elicker  Jianhong Wang  Zeynep Erdiller  Sun-Mi Lee  Chia-Hui Lin  Ping-Yun Sun 《Early childhood research quarterly》2005,20(4):451-464

The purpose of this study was to examine what, if anything, caregivers and teachers of 3- to 5-year-old children from the U.S. (n = 412), China (n = 244), Taiwan (n = 222), Korea (n = 574), and Turkey (n = 214), had in common in terms of self-reported beliefs and self-reported practices related to the National Association for the Education of Young Children's (NAEYC) policy statement for developmentally appropriate practices (DAP). DAP is widely endorsed by early childhood education and care professionals in the U.S. and is assumed to have far reaching impact on curricular beliefs and practices throughout the world. Pearson correlations and one-way ANOVA were used to compare overall mean scores for beliefs measured by the Teachers Beliefs Scale (TBS) to those of practices measured by the Instructional Activities Scale (IAS) [Charlesworth, R., Hart, C. H., Burts, D. C., & Hernandez, S. (1991). Kindergarten teachers’ beliefs and practices. Early Child Development and Care, 70, 17–35]. Item-by-item analyses were conducted using factor analysis and χ² analyses within and across countries. Similarities emerged related to, in particular, those beliefs and teaching practices associated with integrating across the curriculum, promoting social/emotional development, providing concrete/hands-on materials, and allowing play/choice in the curriculum.  相似文献   

Proposal for a cross layer scheme for real-time wireless video     

JEYARAJ Arulsaravana CHENG Liang EL ZARKI Magda 《浙江大学学报(A卷英文版)》2006,7(10):1690-1694

INTRODUCTION Increase in wireless system capacity through 3G services and innovative low bit rate video coding techniques have made it possible to have mobile multimedia services on hand-held systems. High quality real-time multimedia services are slowly be- ing deployed on hand-held systems. However large scale deployment at low cost is still to be realized due to technological challenges such as stringent power control under severely fading environments and the susceptibility of high qu…  相似文献   

基于不对称开发的快速路横断面优化设计     

刘琦  陈大伟 《中国科技信息》2007,(9):90-92

这篇文章首先介绍了快速路设计中几种常见的横断面型式,然后根据快速路两侧土地开发不对称的情况,结合政府对该地区的用地政策及开发计划,同时分析其两侧交通出行的特点,提出横断面优化设计方案。  相似文献   

“十字交叉法”巧解化学计算题     

陈建如 《河北北方学院学报(社会科学版)》1998,(Z2)

介绍了中学化学计算中常用的一种简化运算形成一“十字交叉法”,并通过例证加以说明,以澄清部分老师和学生不明其理只会引用的模糊概念,弄清其来龙去脉。  相似文献   

跨行政区域创新策源能力评价与实证——基于熵权法、TOPSIS法、灰色关联分析   总被引：1，自引：0，他引：1  

肖玉贤  宁连举  崔然  刘经涛 《科技管理研究》2021,41(20):44-51

跨行政区域创新策源能力的形成与发展是我国现阶段重要战略,包含创新策源的主体、条件、途径与内容多个要素.通过重新解读创新策源能力,从创新政策、创新投入、创新产出、开放发展4个方面选择36个三级指标,构建跨行政区域创新策源能力评价指标体系,运用我国八大经济区指标数据,采用熵权法、灰色关联分析法和TOPSIS法确定评价指标权重和关联度、确定八大区创新策源能力排序及其关联度.结果显示:创新投入、开放发展是区域创新策源能力的重要影响因素,尤其是科学新发现;八大区创新策源能力具有明显差异,华南、华东、华北、华中、西南五大经济区的创新策源水平高于东北、西北两大经济区,其中东部沿海综合经济区与长江中游综合经济区、南部沿海经济区的创新策源能力关联度最高.  相似文献   

Back to common sense: Oxford dictionary descriptive knowledge augmentation for aspect-based sentiment analysis     

《Information processing & management》2023,60(3):103260

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