共查询到20条相似文献，搜索用时 62 毫秒
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胡舒合 《韩山师范学院学报》2003,24(3):13-15
研究了独立或相依样本时非参数回归函数的Nadaraya-Watson估计，在简洁合理的条件下，证明了估计量的渐近正态性，获得的结论可在时间序列分析中得到应用． 相似文献
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本文给出正交态及非正交态的量子缠绕，通过分析两个实例，发现能够产生不遵守Ｂｅｌｌ不等式最大限度的缠绕态。 相似文献
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张睿 《南昌教育学院学报》2013,(12):173-174
日语可能态在日语中占据着重要的作用。由于可能态的表达方式复杂多样,日语学习者较难正确地掌握,本文通过引用、举例、对比和归纳相结合的方法,来分析日语可能态与汉语可能表现的对应关系。从中找出与汉语最接近的对应翻译,进而总结出日语可能态与汉语可能表现的对译规律和技巧。 相似文献
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《佳木斯教育学院学报》2015,(12)
在现代外语教育领域中,多媒体和网络技术的广泛运用使多模态英语课堂教学日益成为现代教学的一个重要特征。在多模态英语课堂教学中,传统的以关注语言模态的教学模式已不能满足学生对信息资源的优化输入及师生更好地交际表达。因此非语言模态与语言模态的相互补充,互相促进及非语言模态自身的配合引起不容小觑的作用,最终使多模态英语课堂教学能够达到最佳的教学效果。 相似文献
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非语义性是音乐审美活动的特征之一;音乐的非语义性特征在审美实践中表现为抒情、意会、传神,且更具艺术纯粹性;探讨与研究如何理解音乐的非语义性特征有着积极而重要的意义. 相似文献
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姬振豫 《天津职业技术师范学院学报》1995,(1):8-9
本文分别用特征函数与stirling公式证明了x^2-分布与t-分布的渐近正态性。在统计推断中，正态变量扮演着重要角色。由于正态变量总可以化为标准正态变量，所以仅用标准正态分布表即可处理一切正态变量的问题，而且正态变量还有其他许多优良的性质，更便于我们进行统计推断工作，而x^2变量t变量等则不然，它们的分布与自由度有关，因此它们的分布表就不能旧为一个表。然而幸好一些分布具有渐近正态的性质，在一定的条件下使问题得到解决。本文就x^2-分布及t-分布进行这一问题的探索。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献