共查询到20条相似文献,搜索用时 78 毫秒
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在能量表象和坐标表象中,分别计算了一维谐振子综的密度矩阵,并得到了在温度T时的平均密度分布,最后讨论了高温极限(T→∞)和低温极限(T→∞). 相似文献
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设T是作用在希耳伯特空间H上的有界线形算子,W(T)是T的数值域.文中讨论了数值域W(T)的端点和角点的一些性质,并推广了文献[1]中的一个结果. 相似文献
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主要讨论了LF拓扑空间上的T2和弱T2分离性的关系,给出了二之间的一些等价条件,并得出了弱T2空间的一些好的性质. 相似文献
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L-fuzzy相对T-1,相对T0与相对次T0分离性 总被引:1,自引:0,他引:1
李尧龙 《宁夏师范学院学报》2004,25(3):1-5
定义了L-fuzzy拓扑空间中的相对T-1,相对T0与相对次T0分离性,讨论了相对T-1,相对T0与相对次T0分离性的一系列性质.证明了相对T-1,相对T0与相对次T0分离性是遗传的、传递的、弱同胚不变的及可乘性等性质,并给出了一些例子。 相似文献
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甘智林 《四川教育学院学报》2003,19(5):37-39
动词的数量特征、名词的时间性是决定“V T (的) N”格式中“T”的语义指向的关键因素,章根据“T”,的语义指向将该格式分析为A:“V ←T (的) N”及B:“V T→ (的) N”两种类型,并着重讨论了将A式分析为述补关系带宾语的原因。 相似文献
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器官移植排斥与耐受的研究进展 总被引:2,自引:0,他引:2
吴文林 《泉州师范学院学报》2003,21(4):77-82
综述了同种异体排斥反应中MHC抗原提呈、T细胞抗原识别、T细胞激活和分化、T细胞免疫效应等机制的研究进展,诱导和维持免疫耐受的机制和方法,包括单克隆抗体、阻断T细胞激活第二信号和转基因技术诱导移植免疫耐受. 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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《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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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献