ERP成分N400运用于语言理解的实证研究综述     

周莉 《桂林师范高等专科学校学报》2009,23(3):102-105

语言加工是连续的、具有多个分析层次的复杂过程。而新近发展起来的ERP技术具有精确的时间分辨率和多维探测指标,可以对语言进行连续的测量,同时对不同层次的分析有不同的敏感指标。ERP成分N400在单词加工、语义加工以及在句法加工中都有着极大的影响与作用。广大英语教师应在这一方面增强和提高理论知识,为教学实践与改革找到理论依据,并从中获得有益的启发和帮助作用。  相似文献   

逆N_0-矩阵的一些性质     

李华 《许昌学院学报》2010,29(2):7-10

在严格对角占优矩阵性质的基础上,给出了不可约对角占优的逆N0-矩阵的若干性质,并且讨论了N0-矩阵和逆N0-矩阵的Hadamard积的模最小特征值的估计.  相似文献   

非物质文化遗产保护视角下的沂源牛郎织女传说解析     

孙金奉 《山东教育学院学报》2010,25(6):86-88

近年来,非物质文化遗产的保护工作进行得如火如荼,成为民俗学界乃至社会关注的焦点。民间传说是非物质文化遗产重要的组成部分,如何保护非物质文化遗产中的民间传说是国家政府和民俗学者共同关心的问题。从非物质文化遗产保护的视角对沂源县牛郎织女传说进行解析,将有利于拓宽其传承和发展的空间。  相似文献   

北京永定河河岸带生态修复对河流水质的影响   总被引：1，自引：0，他引：1  

王紫琦  张娜  孙威  王鲜鲜 《中国科学院大学学报》2015,32(4):498-505

为探讨河岸带生态修复措施对河流水质的直接影响,以永定河已修复的门城湖—莲石湖区段为研究对象,于2013年7—10月沿西岸选取8个采样点,测定溶解氧(DO)、氨氮(NH₄⁺—N)、硝氮(NO₃^-—N)和总磷(TP)的质量浓度.结果表明,河流DO浓度和各营养物质浓度均有明显的季节变化.大部分采样点的DO、NH₄⁺—N和TP浓度未达到地表水IV类水体标准.水生植物较多的河岸带处,河流NH₄⁺—N浓度较低.在生长旺季,长势好的水生植物越多,河流DO和NO₃^-—N浓度越高,TP浓度越低;在生长末期,枯落物较多的河岸带处,河流DO浓度较低,TP浓度较高.凸岸处的河流DO和NO₃^-—N浓度较高,而NH₄⁺—N浓度较低.因此,改变护岸类型、水生植物的多度及河岸的弯曲程度等河岸带结构特征可引起河流水质的变化.  相似文献   

论新四军的体育运动     

吴云峰 《军事体育进修学院学报》2010,29(1):79-82

新四军重视体育运动,通过开展多种运动项目,举办运动会,生产劳动锻炼,进行早锻炼,开展军事技术训练来提高干部战士的身体素质。新四军体育运动的特点是：注重体育设施建设,注重实效,不拘泥于形式,注重运动的普及性,遵循由易到难,循序渐进的原则,要求严格。新四军体育运动的开展,提高了部队的战斗力,推动了统一战线工作的开展,丰富了军民文化生活。  相似文献   

当代台湾寒山研究管窥     

贺莉 《台州学院学报》2009,31(4):5-9

20世纪70年代,台湾文化界兴起了一股对唐代隐逸诗人寒山的研究热潮,相关成果汇编为《寒山子传记资料》。其中收集的六十余篇文章中,寒山其人的还原、寒山诗歌的研究、日美“寒山热”现象的分析等等,构成了这一时期寒山研究的主要内容。这次研究热潮体现出了关注度高、成果丰富、研究者的身份多元化和研究方法的多样性等特色,取得了不小的成绩,但也存在着学理性偏弱和某些形式上的不足等。  相似文献   

ISSR markers based on GA and AG repeats reveal genetic relationship among rice varieties tolerant to drought, flood, or salinity     

Ch Surendhar Reddy  A. Prasad Babu  B. P. Mallikarjuna Swamy  K. Kaladhar  N. Sarla 《Journal of Zhejiang University. Science. B》2009,10(2):133-141

Drought,flood,salinity,or a combination of these limits rice production.Several rice varieties are well known for their tolerance to specific abiotic stresses.We determined genetic relationship among 12 rice varieties including 9 tolerant to drought,flood,or salinity using inter-simple sequence repeat (ISSR) markers.Based on all markers,the nine tolerant varieties formed one cluster distinct from the cluster of three control varieties.The salt-tolerant varieties were closest to two flood-tolerant varieties,and together they were distinct from the drought-tolerant varieties.(GA)8 YG was the most informative primer,showing the highest polymorphic information content (PIC) and resolving power (Rp).The drought-,flood-,and salt-tolerant varieties grouped in three distinct clusters within the group of tolerant varieties,when (GA)8 YG was used.Sabita was the only exception.The two aus varieties,Nagina22 and FR13A,were separated and grouped with the drought-and flood-tolerant varieties,respectively,but they were together in dendrograms based on other primers.The results show that ISSR markers associated with (GA)8 YG delineated the three groups of stress-tolerant varieties from each other and can be used to identify genes/new alleles associated with the three abiotic stresses in rice germplasm.  相似文献   

Enhancive effect of N,N′-dinitrosopiperazine on inducing precancerous lesion on nasal and/or nasopharyngeal epithelia of TgN(p53mt-LMP1)/HT mice     

Dao-fa Tian  Ying-chun He  Fang-guo Lu  Fa-qing Tang 《Journal of Zhejiang University. Science. B》2009,10(3):172-179

Objective  To investigate the enhancive effect of N,N′-dinitrosopiperazine (DNP) on induced carcinogenesis in nasal and/or nasopharyngeal epithelia among TgN(p53mt-LMP1)/HT transgenic mice to examine the underlying mechanism for the development of nasopharyngeal carcinoma (NPC). Methods  TgN(p53mt-LMP1)/HT transgenic mice and the same strain of C₅₇BL/6J wild-type mice both at the age of 5 months were randomly divided into 2 groups in parallel, respectively, i.e., TgN(p53mt-LMP1)/HT cancerous lesion-inducing group (TI), TgN(p53mt-LMP1)/HT control group (TC), C₅₇BL/6J cancerous lesion-inducing group (CI), and C₅₇BL/6J control group (CC). TI and CI mice were treated only with DNP for 16 weeks, twice each week, while TC and CC mice were given the same volume of saline as controls. At the end of treatment, animals were sacrificed to collect epithelial tissue samples from nasal cavity and nasopharynx for pathohistological evaluation by haematoxylin and eosin (HE) staining and for determination on the expression of TRAF2, c-Jun, and p16 by immunohistochemistry. Results  Atypical hyperplasia was more significant in the samples of TI than in those of TC, CI, and CC, with the rates of lesions being 90%, 10%, 0, and 0 (P<0.01) respectively, though DNP was used alone in a much shortened inducing period at less dosage and without the use of carcinogenic promoter 12-O-tetradecanoylphorbol-13-acetate as usual. The expressions of tumor necrosis factor (TNF) receptor-associated factor 2 (TRAF2) and c-Jun in these samples were significantly up-regulated in TI (P<0.01), while the expression of p16 was significantly lower in TI than in the other groups (P<0.01). Conclusion  TgN(p53mt-LMP1)/HT mice hold inherited constitutional defect in immune surveillance function, which can be aggravated by environmental carcinogens, such as DNP used even though in a much less strength. The enhanced carcinogenesis-inducing effect of DNP on TgN(p53mt-LMP1)/HT mice should be closely associated with abnormal signaling of activator protein-1 (AP-1) pathway, especially up-regulated expressions of TRAF2 and c-Jun, and down-regulated expression of p16. Project supported by the National Natural Science Foundation of China (Nos. 30672738, 30572455 and 30572408), Hunan Provincial Natural Science Foundation for Distinguished Young Scholars (No. 03JJY1006) and for General Projects (Nos. 05JJ40029 and 07JJ6038), the Research Foundation of Hunan Provincial Scientific and Technological Department for International Cooperative Academic Projects (No. 06WK3016), and the Research Foundation of Hunan Provincial Education Department for Outstanding Young Scholars (No. 06B070), China  相似文献   

水下无人航行器回收技术研究     

杨咚 《科技广场》2013,(5):177-182

本文阐述了水下UUV对接回收的几种方式,以及这些对接回收方式的优缺点。分析了影响水下UUV对接回收技术的力学、控制以及导航等关键技术难题和相应的解决思路,探讨了水下UUV对接回收技术的发展趋势。  相似文献   

基于STM32的远程升级系统的设计     

温世坚  张伟波 《科技广场》2013,(5):97-100

本文介绍了一种基于STM32芯片的远程升级系统的设计方案。简述了从数据下载线、客户端、服务器到数据库MYSQL设计的全部过程,并提供了客户端、服务器的通信细节分析,提供了升级操作的可靠性和便利性。  相似文献