共查询到20条相似文献，搜索用时 62 毫秒
1.
通过应用权函数的方法及实分析的技巧,建立了全平面上一个新的具有最佳常数因子的-2齐次核为1/(x-y)2+axy(0相似文献
2.
讨论了多变量情形下的非线性积分不等式,和已有的结果相比,该结果不受函数单调性的限制,从而把Cheung和Ma的相关结果作为本文结果的特殊情形,并将结果应用到证明偏微分方程解的有界性上． 相似文献
3.
4.
熊斌 《数学学习与研究(教研版)》2007,(1):73-74,78
平面图形中所含的线段长度、角的大小及图形的面积在许多情形下会呈现不等的关系，由于这些不等关系出现在几何问题中，故称之为几何不等式。 相似文献
5.
6.
对一道公开征解的不等式进行了证明,并将该不等式推广到更一般的情形,对一般情形也予以证明.最后,探讨了特殊情形下不等式的几何意义. 相似文献
7.
8.
杨必成 《广东教育学院学报》2007,27(5):1-5
通过引入参数及估算权函数,建立一个核为-3齐次的Hilbert型积分不等式及其等价式,并用复分析的方法,算出其最佳常数因子的积分值,还考虑了逆向的情形及一些特殊结果. 相似文献
9.
杨必成 《广东教育学院学报》2014,(5):1-23
引入独立参量,应用权函数的方法及实分析技巧,建立一个具有最佳常数因子的全平面非齐次核Hilbert型积分不等式,考虑了其等价式、逆式及相关的齐次式与Hardy型不等式;定义了全平面Hilbert型积分算子,还求出了一些特殊核的算子范数. 相似文献
10.
在有关定积分不等式中，Minkowski不等式占有重要地位。将《数学分析》中提到的Minkowski不等式推广到更加一般的情形．从而改进已有的结论。 相似文献
11.
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
12.
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
13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
14.
15.
16.
《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
17.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
18.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
20.
《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