共查询到19条相似文献，搜索用时 62 毫秒
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胡爱莲 《喀什师范学院学报》2007,28(6):4-8
给出了如下的半线性椭圆方程Neumann-Δu-|μx|u2=|ux|ps-λu,x∈Ω;u>0,x∈Ω;Dγu=σφ(x),x∈Ω\{0}.边值问题正解的存在性和非存在性;其中Ω∈RN(N≥5)是一个边界为C1的有界光滑区域,0∈Ω,10,σ>0,0<μ<μ*,γ是定义在边界Ω上的单位外法向,φ(x)∈Cα(Ω),且φ(x)≥0,φ(x)≠0. 相似文献
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讨论了当0＜m＜1-2/N(N≥3)时,柯西问题ut=Δum-up u(x,0)=0 x∈RN\{0}的非平凡解的存在性. 相似文献
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蒋良军 《南京晓庄学院学报》2012,(6):17-20
文章讨论一类具齐次Dirichlet边界条件的方程组ut=Δu+emu(x0,t)+pv(x0,t),vt=Δv+equ(x0,t)+nv(x0,t).其中x0是RN中有界区域内的固定点.通过四个充分与必要条件,得到解同时与不同时爆破的完整分类.有趣的是,在某指数范围内,大初值u0(v0)引起u(v)的爆破,而在这些初值之间,出现同时爆破. 相似文献
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考虑如下Kirchhoff方程:-(a+b ∫R｜▽u 〡2dx)△u=V(x)u=f(x,u),x∈RN(E)非平凡弱解的存在性问题,利用临界点理论中的山路引理,方程(E)弱解的存在性结果被证明. 相似文献
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陈明玉 《泉州师范学院学报》2002,20(4):3-7
讨论带吸收项的非线性双重退缩抛物方程ut =div(| um|p-2 um) -uq 具有初值u(x ,0 ) =μ∈L∞loc(RN)的Cauchy问题 .利用正则化方法 ,首先得到了正则化问题非负古典解的一致估计 ,最后在初值满足一定的增长条件下 ,证明了双重退缩抛物方程Cauchy问题弱解的存在性与不存在性 . 相似文献
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设f:RN×R ×RN→R 和g:R →R 连续.本文研究形如△u f(x,u,V u)g(u)=0,x∈RN(N≥3)的拟线性椭圆方程的正整体解,给出了该类方程具有有界的正整体解的若干充分条件;同时,为了求其上、下解,我们以Schauder-Tychonoff不动点定理为工具研究相应方程的径向对称解存在性. 相似文献
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一类混合单调算子的不动点定理及其应用 总被引：1，自引：0，他引：1
吴焱生 《赣南师范学院学报》2000,(6)
本文利用半序方法研究了一类混合单调算子 ,在非紧性非连续性假设下得到了不动点的存在唯一性 ,并把所得结果应用于RN 上的Hammerstain积分方程之中 相似文献
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本文研究非线性反应扩散方程,满足初始条件u(x,0)=u0(x)∈L2(RN)(2)的解的存在性。 相似文献
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奇异拟线性椭圆方程的正整体有界解 总被引：1，自引：0，他引：1
吴炯圻 《Journal of Zhangzhou Technical Institute》2006,8(4):1-6
设β≥0是常数,f:RN×R ×RN→RN是一个连续函数．本文研究形如△u f(x,u,▽u)u-β=0,x∈RN(N≥3)的奇异拟线性椭圆方程的正整体解,给出了该类方程具有界的正整体解的若干充分条件． 相似文献
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0～1评分法是工程经济分析中的一种思维方式、组织管理方法、设计理念和建造原则,它以功能分析为核心,以产品、工艺技术等为研究对象,以有组织的集体创造活动为基础,以提高产品价值为目标.0～1评分法是一种识别和消除不必要的费用（在不牺牲质量和可靠性的前提下）的有组织的努力. 相似文献
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Gillian U. Bayne 《Cultural Studies of Science Education》2009,4(3):559-567
This article reviews significant contributions made by Joe L. Kincheloe to critical research in science education, especially
through a multimethodological, multitheoretical, and multidisciplinary informed lens that incorporates social, cultural, political,
economic, and cognitive dynamics—the bricolage. Kincheloe’s ideas provide for a compelling understanding of, and insights
into, the forces that shape the intricacies of teaching and learning science and science education. They have implications
in improving science education policies, in developing actions that challenge and cultivate the intellect while operating
in ways that are more understanding of difference and are socially just.
Gillian U. Bayne is an assistant professor of science education at Lehman College, City University of New York. Having also completed a master’s degree in secondary science education at New York University, she has taught science both in New York City’s public school system and in independent schools for over 10 years. Gillian’s research interests are focused on the utilization of cogenerative dialogues with high school and college students, their teachers and other stakeholders to improve science teaching and learning. 相似文献
| Gillian U. BayneEmail: |
Gillian U. Bayne is an assistant professor of science education at Lehman College, City University of New York. Having also completed a master’s degree in secondary science education at New York University, she has taught science both in New York City’s public school system and in independent schools for over 10 years. Gillian’s research interests are focused on the utilization of cogenerative dialogues with high school and college students, their teachers and other stakeholders to improve science teaching and learning. 相似文献
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对迹非零非对称本原矩阵的本原指数集作出了完全刻划.所得的结论是：（1）把迹非零非对称本原矩阵类QBn的结构按照矩阵的迹划分为互不相交的两大子类：QBn=QBn（Ⅰ）∪QBn（Ⅱ）,QBn（Ⅰ）∩QBn（Ⅱ）=φ;（2）确定出子类QBn（Ⅰ）的本原指数集E1={2,3,...,n-1}和子类QBn（Ⅱ）的本原指数集E2={2,3,...,2n-2};（3）进而确定出迹非零非对称本原矩阵类QBn的本原指数集En=E1∪E2={2,3,...,2n-3,2n-2}. 相似文献
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This paper addresses the dilemma of trying to prepare primarily white preservice teachers for educational arenas in which they will interface with students of colour and many who are socially disadvantaged. This paper describes how diversity study circles can be integrated as integral to education that is multicultural in the development of preservice teachers’ critical self-reflection as a bridge to developing a critical lens for classroom practice and a democratic society. 相似文献
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R.T. Pithers Rebecca Soden 《Educational research; a review for teachers and all concerned with progress in education》2013,55(3):237-249
National governments and employers have argued that it is important for all sectors of education to prepare individuals who are able to think well and for themselves. 'Good thinking' and 'thinking well' are commonly used terms bound up with what is called 'critical thinking' in the research literature. Evidence is presented in this paper, however, which suggests that not all students may be good at critical thinking; nor do some teachers appear to teach students 'good thinking' skills. A review of the research literature in this area was undertaken and the methods and conceptions of teaching likely to inhibit and enhance critical thinking are outlined, as well as what is required to improve students' thinking skills. Ways forward in teaching critical thinking, and in helping students to learn to think well and for themselves, are described and discussed. 相似文献
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施洁 《淮北职业技术学院学报》2003,2(4):78-79
当今市场瞬息万变,企业应及时抓住市场变化,并将变化反应在战略之中,并付诸实施,平衡计分卡仅适用于战略实施与评估,在战略形成方面具有局限性,而关键成功因素法有利于战略形成,它也可作为平衡计分卡制定的基础,将二者结合起来,能够把战略制定、战略实施和战略评估有机地联系起来。 相似文献