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1.
本研究含慢变量非线性系统边值问题：x′=f(t,x,y,ε)x(1,ε)= α（ε）εy″=F（t，x，y，y′，ε），y（1,ε）=b(ε),y(0,ε=c(ε)当F（t,x,y,y′，ε)关于y′的Jacabi矩阵Fy′的特征值具有非零实部时，应用对角化技巧证明了摄动解的存在性，并给出了解的零阶近似。 相似文献
2.
罗天法 《广西广播电视大学学报》2007,18(3):70-73
本文以yahoo网站主页的每日新闻标题为材料自建语料库,分两次从中选出英语新闻标题共280条,每次140条,旨在用语料库的方法证实英语新闻标题是否在语法上(动词时态上、语态上)、用词上等方面有其显著特点。 相似文献
3.
Amanda Spink Bernard J. Jansen Chris Blakely Sherry Koshman 《Information processing & management》2006
The performance and capabilities of Web search engines is an important and significant area of research. Millions of people world wide use Web search engines very day. This paper reports the results of a major study examining the overlap among results retrieved by multiple Web search engines for a large set of more than 10,000 queries. Previous smaller studies have discussed a lack of overlap in results returned by Web search engines for the same queries. The goal of the current study was to conduct a large-scale study to measure the overlap of search results on the first result page (both non-sponsored and sponsored) across the four most popular Web search engines, at specific points in time using a large number of queries. The Web search engines included in the study were MSN Search, Google, Yahoo! and Ask Jeeves. Our study then compares these results with the first page results retrieved for the same queries by the metasearch engine Dogpile.com. Two sets of randomly selected user-entered queries, one set was 10,316 queries and the other 12,570 queries, from Infospace’s Dogpile.com search engine (the first set was from Dogpile, the second was from across the Infospace Network of search properties were submitted to the four single Web search engines). Findings show that the percent of total results unique to only one of the four Web search engines was 84.9%, shared by two of the three Web search engines was 11.4%, shared by three of the Web search engines was 2.6%, and shared by all four Web search engines was 1.1%. This small degree of overlap shows the significant difference in the way major Web search engines retrieve and rank results in response to given queries. Results point to the value of metasearch engines in Web retrieval to overcome the biases of individual search engines. 相似文献
4.
《鹿鼎记》不同于作者以往的武侠小说,呈现和建构了一个"非武侠"的世界。作者使用宏大叙事与大话文学的内在张力,体现对政治/权威的反讽,并通过"非武非侠"对经典"武侠"叙事的消解,体现对正统文化的解构,呈现出狂欢化叙事与文本的反讽效果。 相似文献
5.
苗雪梅 《河北广播电视大学学报》2013,(2):60-63
《墨子》是阐述墨家思想的重要著作,其中政治思想、伦理思想、哲学思想、逻辑思想和军事思想都比较突出。目前,针对《墨子》李译本的研究为数甚少。结合具体实例,从李译本的翻译成果看,李译本中存在文本误释现象,因此,观察造成文本误释现象的主客观原因,探讨译者的翻译策略,正确解读文化差异尤为重要。 相似文献
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微波技术发展及应用综述 总被引：1，自引：0，他引：1
微波技术是近一个世纪以来最重要的科学技术之一，从雷达到广播电视、无线电通信再到微波炉，微波技术对社会的发展和人们生活的进步产生着深远的影响。本文介绍了微波技术的发展以及在各个领域中的应用，并对微波技术未来的发展方向进行了讨论。 相似文献
7.
王秀艳 《昭通师范高等专科学校学报》2007,29(6):29-32
从生态女性主义的视角分析《啊,拓荒者!》中的人物形象,从女主人公对待自我女性身份和与其他女性的关系等来分析其女性意识,从她对待土地的态度来分析其自然观,结果表明:女主人公由于受到父权制世界观和人类中心主义的影响,缺乏对女性身份及自然的正确认知,因而性格中曾经存在着男权倾向,排斥女性身份并以征服和利用土地来满足自我利益;但随着其认知的深入,主人公逐渐接受自我身份,并产生了对人类与自然相互依存关系的深层认知。 相似文献
8.
徐明丽 《连云港师范高等专科学校学报》2007,(1):20-22
《啊!拓荒者》是薇拉·凯瑟最有特色的一部代表作.凯瑟的宗教观影响了她对小说中人物的看法和命运安排;她对《圣经》中的某些诫律和典故的套用,丰富和充实了作品的内容;她对"叙述暴力"的适度运用,使作品产生了撼人心魄的效果.凯瑟捍卫传统的道德观,鄙视违反宗教教义的不忠与苟合.与此同时,她又对某些宗教教叉产生了怀疑,并希望对其进行改革. 相似文献
9.
《Public Library Quarterly》2013,32(3-4):27-40
The survey was conducted to further substantiate and extend knowledge of the vital role of children's sewices in ublic library sewice. The findings are compared with two studies ofsimi- lar inquiry. It was determined that frequent childhood use portends adult use. Family interest, school media center access, sex, and education are significantly associated with adult library use. Adult patronage is principally for personal rather than work or other pur- poses. The findings gu~de the formulation of marketing strategy, par- ticularly market develo ment and promotional policy, designed to live patrons. i increase the use of chi1 ren's services and to develop long-term aclive patrons. 相似文献
10.
This study investigated the ability of the English and Spanish versions of the Get Ready to Read! Screener (E-GRTR and S-GRTR) administered at the beginning of the preschool year to predict the oral language and phonological
and print processing skills of Spanish-speaking English-language learners (ELLs) and English-only speaking children (EO) at
the end of the year. The results revealed that the E-GRTR predicted the EO and ELL children’s English emergent literacy skills
and the ELL children’s Spanish emergent literacy skills, and the S-GRTR predicted the ELL children’s English and Spanish emergent
literacy skills. For both groups, the E-GRTR and the S-GRTR were better at predicting children’s print knowledge in English
and Spanish compared to the other emergent literacy measures. The findings suggest that both screeners can be used effectively
to assess preschool children’s emergent literacy skills. 相似文献